diff --git a/goldendict.pro b/goldendict.pro index 3b2a229e..bc1c2ecf 100644 --- a/goldendict.pro +++ b/goldendict.pro @@ -281,3 +281,5 @@ QMAKE_EXTRA_COMPILERS += updateqm TS_OUT = $$TRANSLATIONS TS_OUT ~= s/.ts/.qm/g PRE_TARGETDEPS += $$TS_OUT + +include( qtsingleapplication/src/qtsingleapplication.pri ) diff --git a/hotkeywrapper.cc b/hotkeywrapper.cc index f7cc168c..c89bd77a 100644 --- a/hotkeywrapper.cc +++ b/hotkeywrapper.cc @@ -11,7 +11,14 @@ ////////////////////////////////////////////////////////////////////////// -QHotkeyApplication::QHotkeyApplication(int & argc, char ** argv) : QApplication(argc,argv) +QHotkeyApplication::QHotkeyApplication( int & argc, char ** argv ): + QtSingleApplication( argc, argv ) +{ +} + +QHotkeyApplication::QHotkeyApplication( QString const & id, + int & argc, char ** argv ): + QtSingleApplication( id, argc, argv ) { } diff --git a/hotkeywrapper.hh b/hotkeywrapper.hh index 500f9121..c51a980a 100644 --- a/hotkeywrapper.hh +++ b/hotkeywrapper.hh @@ -15,6 +15,7 @@ #include "ex.hh" +#include "qtsingleapplication.h" ////////////////////////////////////////////////////////////////////////// @@ -136,14 +137,15 @@ public: {} }; -class QHotkeyApplication : public QApplication +class QHotkeyApplication : public QtSingleApplication { friend class HotkeyWrapper; QList< DataCommitter * > dataCommitters; public: - QHotkeyApplication(int & argc, char ** argv); + QHotkeyApplication( int & argc, char ** argv ); + QHotkeyApplication( QString const & id, int & argc, char ** argv ); void addDataCommiter( DataCommitter & ); void removeDataCommiter( DataCommitter & ); diff --git a/main.cc b/main.cc index 157f9f0b..670ebaf6 100644 --- a/main.cc +++ b/main.cc @@ -78,7 +78,10 @@ int main( int argc, char ** argv ) #endif - QHotkeyApplication app( argc, argv ); + QHotkeyApplication app( "GoldenDict", argc, argv ); + + if ( app.sendMessage("bringToFront") ) + return 0; // Another instance is running app.setApplicationName( "GoldenDict" ); app.setOrganizationDomain( "http://goldendict.org/" ); @@ -97,49 +100,6 @@ int main( int argc, char ** argv ) cfg.hunspell.dictionariesPath = Config::getPortableVersionMorphoDir(); } - // Prevent execution of the 2nd copy - - // get pid - quint64 current_pid = QCoreApplication::applicationPid(); - -// QString app_fname = QFileInfo(QCoreApplication::applicationFilePath()).baseName(); -// quint64 pid = ProcessWrapper::findProcess( -// app_fname.toAscii().data(), -// current_pid); -// -// qDebug() << "pid " << pid; -// qDebug() << "current_pid " << current_pid; - - // check pid file - QFile pid_file( Config::getPidFileName() ); - - if ( pid_file.exists() ) // pid file exists, check it - { - pid_file.open( QIODevice::ReadWrite ); - QDataStream ds( &pid_file ); - quint64 tmp; ds >> tmp; - pid_file.close(); - - bool isExist = ProcessWrapper::processExists(tmp); - if ( isExist && tmp != current_pid ) - { - puts( "Another GoldenDict copy started already." ); - return 1; - } - -// if ( tmp == pid ) // it is active - exiting -// { -// // to do: switch to pid ? -// return 1; -// } - } - - pid_file.open( QIODevice::WriteOnly ); - QDataStream ds( &pid_file ); - ds << current_pid; - pid_file.close(); - - // Load translations QTranslator qtTranslator; @@ -175,12 +135,12 @@ int main( int argc, char ** argv ) app.addDataCommiter( m ); + QObject::connect( &app, SIGNAL(messageReceived(const QString&)), + &m, SLOT(messageFromAnotherInstanceReceived(const QString&))); + int r = app.exec(); app.removeDataCommiter( m ); - // remove pid file - pid_file.remove(); - return r; } diff --git a/mainwindow.cc b/mainwindow.cc index 1a6d2ce8..1a88c009 100644 --- a/mainwindow.cc +++ b/mainwindow.cc @@ -2031,3 +2031,11 @@ void MainWindow::applyWordsZoomLevel() wordsZoomBase->setEnabled( cfg.preferences.wordsZoomLevel != 0 ); } + +void MainWindow::messageFromAnotherInstanceReceived( QString const & message ) +{ + if ( message == "bringToFront" ) + toggleMainWindow( true ); + else + qWarning() << "Unknown message received from another instance: " << message; +} diff --git a/mainwindow.hh b/mainwindow.hh index 17e4dd4f..0ac0a9c5 100644 --- a/mainwindow.hh +++ b/mainwindow.hh @@ -38,6 +38,10 @@ public: virtual void commitData( QSessionManager & ); +public slots: + + void messageFromAnotherInstanceReceived( QString const & ); + private: void commitData(); diff --git a/qtsingleapplication/INSTALL.TXT b/qtsingleapplication/INSTALL.TXT new file mode 100644 index 00000000..bbb74a9d --- /dev/null +++ b/qtsingleapplication/INSTALL.TXT @@ -0,0 +1,254 @@ +INSTALLATION INSTRUCTIONS + +These instructions refer to the package you are installing as +some-package.tar.gz or some-package.zip. The .zip file is intended for use +on Windows. + +The directory you choose for the installation will be referred to as +your-install-dir. + +Note to Qt Visual Studio Integration users: In the instructions below, +instead of building from command line with nmake, you can use the menu +command 'Qt->Open Solution from .pro file' on the .pro files in the +example and plugin directories, and then build from within Visual +Studio. + +Unpacking and installation +-------------------------- + +1. Unpacking the archive (if you have not done so already). + + On Unix and Mac OS X (in a terminal window): + + cd your-install-dir + gunzip some-package.tar.gz + tar xvf some-package.tar + + This creates the subdirectory some-package containing the files. + + On Windows: + + Unpack the .zip archive by right-clicking it in explorer and + choosing "Extract All...". If your version of Windows does not + have zip support, you can use the infozip tools available + from www.info-zip.org. + + If you are using the infozip tools (in a command prompt window): + cd your-install-dir + unzip some-package.zip + +2. Configuring the package. + + The configure script is called "configure" on unix/mac and + "configure.bat" on Windows. It should be run from a command line + after cd'ing to the package directory. + + You can choose whether you want to use the component by including + its source code directly into your project, or build the component + as a dynamic shared library (DLL) that is loaded into the + application at run-time. The latter may be preferable for + technical or licensing (LGPL) reasons. If you want to build a DLL, + run the configure script with the argument "-library". Also see + the note about usage below. + + (Components that are Qt plugins, e.g. styles and image formats, + are by default built as a plugin DLL.) + + The configure script will prompt you in some cases for further + information. Answer these questions and carefully read the license text + before accepting the license conditions. The package cannot be used if + you do not accept the license conditions. + +3. Building the component and examples (when required). + + If a DLL is to be built, or if you would like to build the + examples, next give the commands + + qmake + make [or nmake if your are using Microsoft Visual C++] + + The example program(s) can be found in the directory called + "examples" or "example". + + Components that are Qt plugins, e.g. styles and image formats, are + ready to be used as soon as they are built, so the rest of this + installation instruction can be skipped. + +4. Building the Qt Designer plugin (optional). + + Some of the widget components are provided with plugins for Qt + Designer. To build and install the plugin, cd into the + some-package/plugin directory and give the commands + + qmake + make [or nmake if your are using Microsoft Visual C++] + + Restart Qt Designer to make it load the new widget plugin. + + Note: If you are using the built-in Qt Designer from the Qt Visual + Studio Integration, you will need to manually copy the plugin DLL + file, i.e. copy + %QTDIR%\plugins\designer\some-component.dll + to the Qt Visual Studio Integration plugin path, typically: + C:\Program Files\Trolltech\Qt VS Integration\plugins + + Note: If you for some reason are using a Qt Designer that is built + in debug mode, you will need to build the plugin in debug mode + also. Edit the file plugin.pro in the plugin directory, changing + 'release' to 'debug' in the CONFIG line, before running qmake. + + + +Solutions components are intended to be used directly from the package +directory during development, so there is no 'make install' procedure. + + +Using a component in your project +--------------------------------- + +To use this component in your project, add the following line to the +project's .pro file (or do the equivalent in your IDE): + + include(your-install-dir/some-package/src/some-package.pri) + +This adds the package's sources and headers to the SOURCES and HEADERS +project variables respectively (or, if the component has been +configured as a DLL, it adds that library to the LIBS variable), and +updates INCLUDEPATH to contain the package's src +directory. Additionally, the .pri file may include some dependencies +needed by the package. + +To include a header file from the package in your sources, you can now +simply use: + + #include + +or alternatively, in pre-Qt 4 style: + + #include + +Refer to the documentation to see the classes and headers this +components provides. + + + +Install documentation (optional) +-------------------------------- + +The HTML documentation for the package's classes is located in the +your-install-dir/some-package/doc/html/index.html. You can open this +file and read the documentation with any web browser. + +To install the documentation into Qt Assistant (for Qt version 4.4 and +later): + +1. In Assistant, open the Edit->Preferences dialog and choose the + Documentation tab. Click the Add... button and select the file + your-install-dir/some-package/doc/html/some-package.qch + +For Qt versions prior to 4.4, do instead the following: + +1. The directory your-install-dir/some-package/doc/html contains a + file called some-package.dcf. Execute the following commands in a + shell, command prompt or terminal window: + + cd your-install-dir/some-package/doc/html/ + assistant -addContentFile some-package.dcf + +The next time you start Qt Assistant, you can access the package's +documentation. + + +Removing the documentation from assistant +----------------------------------------- + +If you have installed the documentation into Qt Assistant, and want to uninstall it, do as follows, for Qt version 4.4 and later: + +1. In Assistant, open the Edit->Preferences dialog and choose the + Documentation tab. In the list of Registered Documentation, select + the item com.nokia.qtsolutions.some-package_version, and click + the Remove button. + +For Qt versions prior to 4.4, do instead the following: + +1. The directory your-install-dir/some-package/doc/html contains a + file called some-package.dcf. Execute the following commands in a + shell, command prompt or terminal window: + + cd your-install-dir/some-package/doc/html/ + assistant -removeContentFile some-package.dcf + + + +Using the component as a DLL +---------------------------- + +1. Normal components + + The shared library (DLL) is built and placed in the + some-package/lib directory. It is intended to be used directly + from there during development. When appropriate, both debug and + release versions are built, since the run-time linker will in some + cases refuse to load a debug-built DLL into a release-built + application or vice versa. + + The following steps are taken by default to help the dynamic + linker to locate the DLL at run-time (during development): + + Unix: The some-package.pri file will add linker instructions to + add the some-package/lib directory to the rpath of the + executable. (When distributing, or if your system does not support + rpath, you can copy the shared library to another place that is + searched by the dynamic linker, e.g. the "lib" directory of your + Qt installation.) + + Mac: The full path to the library is hardcoded into the library + itself, from where it is copied into the executable at link time, + and ready by the dynamic linker at run-time. (When distributing, + you will want to edit these hardcoded paths in the same way as for + the Qt DLLs. Refer to the document "Deploying an Application on + Mac OS X" in the Qt Reference Documentation.) + + Windows: the .dll file(s) are copied into the "bin" directory of + your Qt installation. The Qt installation will already have set up + that directory to be searched by the dynamic linker. + + +2. Plugins + + For Qt Solutions plugins (e.g. image formats), both debug and + release versions of the plugin are built by default when + appropriate, since in some cases the release Qt library will not + load a debug plugin, and vice versa. The plugins are automatically + copied into the plugins directory of your Qt installation when + built, so no further setup is required. + + Plugins may also be built statically, i.e. as a library that will be + linked into your application executable, and so will not need to + be redistributed as a separate plugin DLL to end users. Static + building is required if Qt itself is built statically. To do it, + just add "static" to the CONFIG variable in the plugin/plugin.pro + file before building. Refer to the "Static Plugins" section in the + chapter "How to Create Qt Plugins" for explanation of how to use a + static plugin in your application. The source code of the example + program(s) will also typically contain the relevant instructions + as comments. + + + +Uninstalling +------------ + + The following command will remove any fils that have been + automatically placed outside the package directory itself during + installation and building + + make distclean [or nmake if your are using Microsoft Visual C++] + + If Qt Assistant documentation or Qt Designer plugins have been + installed, they can be uninstalled manually, ref. above. + + +Enjoy! :) + +- The Qt Solutions Team. diff --git a/qtsingleapplication/README.TXT b/qtsingleapplication/README.TXT new file mode 100644 index 00000000..06abb095 --- /dev/null +++ b/qtsingleapplication/README.TXT @@ -0,0 +1,33 @@ +Qt Solutions Component: Single Application + +The QtSingleApplication component provides support for +applications that can be only started once per user. + + + +Version history: + +2.0: - Version 1.3 ported to Qt 4. + +2.1: - Fix compilation problem on Mac. + +2.2: - Really fix the Mac compilation problem. + - Mac: fix crash due to wrong object releasing. + - Mac: Fix memory leak. + +2.3: - Windows: Force creation of internal widget to make it work + with Qt 4.2. + +2.4: - Fix the system for automatic window raising on message + reception. NOTE: minor API change. + +2.5: - Mac: Fix isRunning() to work and report correctly. + +2.6: - - initialize() is now obsolete, no longer necessary to call + it + - - Fixed race condition where multiple instances migth be started + - - QtSingleCoreApplication variant provided for non-GUI (console) + usage + - Complete reimplementation. Visible changes: + - LGPL release. + diff --git a/qtsingleapplication/buildlib/buildlib.pro b/qtsingleapplication/buildlib/buildlib.pro new file mode 100644 index 00000000..37dddcda --- /dev/null +++ b/qtsingleapplication/buildlib/buildlib.pro @@ -0,0 +1,13 @@ +TEMPLATE=lib +CONFIG += qt dll qtsingleapplication-buildlib +mac:CONFIG += absolute_library_soname +win32|mac:!wince*:!win32-msvc:!macx-xcode:CONFIG += debug_and_release build_all +include(../src/qtsingleapplication.pri) +TARGET = $$QTSINGLEAPPLICATION_LIBNAME +DESTDIR = $$QTSINGLEAPPLICATION_LIBDIR +win32 { + DLLDESTDIR = $$[QT_INSTALL_BINS] + QMAKE_DISTCLEAN += $$[QT_INSTALL_BINS]\\$${QTSINGLEAPPLICATION_LIBNAME}.dll +} +target.path = $$DESTDIR +INSTALLS += target diff --git a/qtsingleapplication/common.pri b/qtsingleapplication/common.pri new file mode 100644 index 00000000..8f5fc804 --- /dev/null +++ b/qtsingleapplication/common.pri @@ -0,0 +1,6 @@ +infile(config.pri, SOLUTIONS_LIBRARY, yes): CONFIG += qtsingleapplication-uselib +TEMPLATE += fakelib +QTSINGLEAPPLICATION_LIBNAME = $$qtLibraryTarget(QtSolutions_SingleApplication-head) +TEMPLATE -= fakelib +QTSINGLEAPPLICATION_LIBDIR = $$PWD/lib +unix:qtsingleapplication-uselib:!qtsingleapplication-buildlib:QMAKE_RPATHDIR += $$QTSINGLEAPPLICATION_LIBDIR diff --git a/qtsingleapplication/configure b/qtsingleapplication/configure new file mode 100755 index 00000000..3c4edfff --- /dev/null +++ b/qtsingleapplication/configure @@ -0,0 +1,25 @@ +#!/bin/sh + +if [ "x$1" != "x" -a "x$1" != "x-library" ]; then + echo "Usage: $0 [-library]" + echo + echo "-library: Build the component as a dynamic library (DLL). Default is to" + echo " include the component source code directly in the application." + echo + exit 0 +fi + +rm -f config.pri +if [ "x$1" = "x-library" ]; then + echo "Configuring to build this component as a dynamic library." + echo "SOLUTIONS_LIBRARY = yes" > config.pri +fi + +echo +echo "This component is now configured." +echo +echo "To build the component library (if requested) and example(s)," +echo "run qmake and your make command." +echo +echo "To remove or reconfigure, run make distclean." +echo diff --git a/qtsingleapplication/configure.bat b/qtsingleapplication/configure.bat new file mode 100644 index 00000000..72c1b83b --- /dev/null +++ b/qtsingleapplication/configure.bat @@ -0,0 +1,39 @@ +@echo off + +rem +rem "Main" +rem + +if not "%1"=="" ( + if not "%1"=="-library" ( + call :PrintUsage + goto EOF + ) +) + +if exist config.pri. del config.pri +if "%1"=="-library" ( + echo Configuring to build this component as a dynamic library. + echo SOLUTIONS_LIBRARY = yes > config.pri +) + +echo . +echo This component is now configured. +echo . +echo To build the component library (if requested) and example(s), +echo run qmake and your make or nmake command. +echo . +echo To remove or reconfigure, run make (nmake) distclean. +echo . + +:PrintUsage +echo Usage: configure.bat [-library] +echo . +echo -library: Build the component as a dynamic library (DLL). Default is to +echo include the component source directly in the application. +echo A DLL may be preferable for technical or licensing (LGPL) reasons. +echo . +goto EOF + + +:EOF diff --git a/qtsingleapplication/doc/html/classic.css b/qtsingleapplication/doc/html/classic.css new file mode 100644 index 00000000..b8cae8e1 --- /dev/null +++ b/qtsingleapplication/doc/html/classic.css @@ -0,0 +1,284 @@ +BODY,H1,H2,H3,H4,H5,H6,P,CENTER,TD,TH,UL,DL,DIV { + font-family: Arial, Geneva, Helvetica, sans-serif; +} +H1 { + text-align: center; + font-size: 160%; +} +H2 { + font-size: 120%; +} +H3 { + font-size: 100%; +} + +h3.fn,span.fn +{ + background-color: #eee; + border-width: 1px; + border-style: solid; + border-color: #ddd; + font-weight: bold; + padding: 6px 0px 6px 10px; + margin: 42px 0px 0px 0px; +} + +hr { + border: 0; + color: #a0a0a0; + background-color: #ccc; + height: 1px; + width: 100%; + text-align: left; + margin: 34px 0px 34px 0px; +} + +table.valuelist { + border-width: 1px 1px 1px 1px; + border-style: solid; + border-color: #dddddd; + border-collapse: collapse; + background-color: #f0f0f0; +} + +table.indextable { + border-width: 1px 1px 1px 1px; + border-style: solid; + border-collapse: collapse; + background-color: #f0f0f0; + border-color:#555; + font-size: 100%; +} + +table td.largeindex { + border-width: 1px 1px 1px 1px; + border-collapse: collapse; + background-color: #f0f0f0; + border-color:#555; + font-size: 120%; +} + +table.valuelist th { + border-width: 1px 1px 1px 2px; + padding: 4px; + border-style: solid; + border-color: #666; + color:white; + background-color:#666; +} + +th.titleheader { + border-width: 1px 0px 1px 0px; + padding: 2px; + border-style: solid; + border-color: #666; + color:white; + background-color:#555; + background-image:url('images/gradient.png')}; + background-repeat: repeat-x; + font-size: 100%; +} + + +th.largeheader { + border-width: 1px 0px 1px 0px; + padding: 4px; + border-style: solid; + border-color: #444; + color:white; + background-color:#555555; + font-size: 120%; +} + +p { + + margin-left: 4px; + margin-top: 8px; + margin-bottom: 8px; +} + +a:link +{ + color: #0046ad; + text-decoration: none +} + +a:visited +{ + color: #672967; + text-decoration: none +} + +a.obsolete +{ + color: #661100; + text-decoration: none +} + +a.compat +{ + color: #661100; + text-decoration: none +} + +a.obsolete:visited +{ + color: #995500; + text-decoration: none +} + +a.compat:visited +{ + color: #995500; + text-decoration: none +} + +body +{ + background: #ffffff; + color: black +} + +table.generic, table.annotated +{ + border-width: 1px; + border-color:#bbb; + border-style:solid; + border-collapse:collapse; +} + +table td.memItemLeft { + width: 180px; + padding: 2px 0px 0px 8px; + margin: 4px; + border-width: 1px; + border-color: #E0E0E0; + border-style: none; + font-size: 100%; + white-space: nowrap +} + +table td.memItemRight { + padding: 2px 8px 0px 8px; + margin: 4px; + border-width: 1px; + border-color: #E0E0E0; + border-style: none; + font-size: 100%; +} + +table tr.odd { + background: #f0f0f0; + color: black; +} + +table tr.even { + background: #e4e4e4; + color: black; +} + +table.annotated th { + padding: 3px; + text-align: left +} + +table.annotated td { + padding: 3px; +} + +table tr pre +{ + padding-top: 0px; + padding-bottom: 0px; + padding-left: 0px; + padding-right: 0px; + border: none; + background: none +} + +tr.qt-style +{ + background: #96E066; + color: black +} + +body pre +{ + padding: 0.2em; + border: #e7e7e7 1px solid; + background: #f1f1f1; + color: black +} + +table tr.qt-code pre +{ + padding: 0.2em; + border: #e7e7e7 1px solid; + background: #f1f1f1; + color: black +} + +span.preprocessor, span.preprocessor a +{ + color: darkblue; +} + +span.comment +{ + color: darkred; + font-style: italic +} + +span.string,span.char +{ + color: darkgreen; +} + +.title +{ + text-align: center +} + +.subtitle +{ + font-size: 0.8em +} + +.small-subtitle +{ + font-size: 0.65em +} + +.qmlitem { + padding: 0; +} + +.qmlname { + white-space: nowrap; +} + +.qmltype { + text-align: center; + font-size: 160%; +} + +.qmlproto { + background-color: #eee; + border-width: 1px; + border-style: solid; + border-color: #ddd; + font-weight: bold; + padding: 6px 10px 6px 10px; + margin: 42px 0px 0px 0px; +} + +.qmlreadonly { + float: right; + color: red +} + +.qmldoc { +} + +*.qmlitem p { +} diff --git a/qtsingleapplication/doc/html/images/qt-logo.png b/qtsingleapplication/doc/html/images/qt-logo.png new file mode 100644 index 00000000..794162f5 Binary files /dev/null and b/qtsingleapplication/doc/html/images/qt-logo.png differ diff --git a/qtsingleapplication/doc/html/index.html b/qtsingleapplication/doc/html/index.html new file mode 100644 index 00000000..af9dab10 --- /dev/null +++ b/qtsingleapplication/doc/html/index.html @@ -0,0 +1,48 @@ + + + + + + Single Application + + + + + + + +
  Home

Single Application
+

+ +

Description

+

The QtSingleApplication component provides support for applications that can be only started once per user.

+

For some applications it is useful or even critical that they are started only once by any user. Future attempts to start the application should activate any already running instance, and possibly perform requested actions, e.g. loading a file, in that instance.

+

The QtSingleApplication class provides an interface to detect a running instance, and to send command strings to that instance. For console (non-GUI) applications, the QtSingleCoreApplication variant is provided, which avoids dependency on QtGui.

+ +

Classes

+ + +

Examples

+ + +

Tested platforms

+ +

+ + + + +
Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)Trademarks
Qt Solutions
+ diff --git a/qtsingleapplication/doc/html/qtsingleapplication-example-loader.html b/qtsingleapplication/doc/html/qtsingleapplication-example-loader.html new file mode 100644 index 00000000..c305ae5b --- /dev/null +++ b/qtsingleapplication/doc/html/qtsingleapplication-example-loader.html @@ -0,0 +1,177 @@ + + + + + + Loading Documents + + + + + + + +
  Home

Loading Documents
+

+

The application in this example loads or prints the documents passed as commandline parameters to further instances of this application.

+
 /****************************************************************************
+ **
+ ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ ** All rights reserved.
+ **
+ ** Contact: Nokia Corporation (qt-info@nokia.com)
+ **
+ ** This file is part of a Qt Solutions component.
+ **
+ ** You may use this file under the terms of the BSD license as follows:
+ **
+ ** "Redistribution and use in source and binary forms, with or without
+ ** modification, are permitted provided that the following conditions are
+ ** met:
+ **   * Redistributions of source code must retain the above copyright
+ **     notice, this list of conditions and the following disclaimer.
+ **   * Redistributions in binary form must reproduce the above copyright
+ **     notice, this list of conditions and the following disclaimer in
+ **     the documentation and/or other materials provided with the
+ **     distribution.
+ **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+ **     the names of its contributors may be used to endorse or promote
+ **     products derived from this software without specific prior written
+ **     permission.
+ **
+ ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+ **
+ ****************************************************************************/
+
+ #include <qtsingleapplication.h>
+ #include <QtCore/QFile>
+ #include <QtGui/QMainWindow>
+ #include <QtGui/QPrinter>
+ #include <QtGui/QPainter>
+ #include <QtGui/QTextEdit>
+ #include <QtGui/QMdiArea>
+ #include <QtCore/QTextStream>
+
+ class MainWindow : public QMainWindow
+ {
+     Q_OBJECT
+ public:
+     MainWindow();
+
+ public slots:
+     void handleMessage(const QString& message);
+
+ signals:
+     void needToShow();
+
+ private:
+     QMdiArea *workspace;
+ };
+

The user interface in this application is a QMainWindow subclass with a QMdiArea as the central widget. It implements a slot handleMessage() that will be connected to the messageReceived() signal of the QtSingleApplication class.

+
 MainWindow::MainWindow()
+ {
+     workspace = new QMdiArea(this);
+
+     setCentralWidget(workspace);
+ }
+

The MainWindow constructor creates a minimal user interface.

+
 void MainWindow::handleMessage(const QString& message)
+ {
+     enum Action {
+         Nothing,
+         Open,
+         Print
+     } action;
+
+     action = Nothing;
+     QString filename = message;
+     if (message.toLower().startsWith("/print ")) {
+         filename = filename.mid(7);
+         action = Print;
+     } else if (!message.isEmpty()) {
+         action = Open;
+     }
+     if (action == Nothing) {
+         emit needToShow();
+         return;
+     }
+
+     QFile file(filename);
+     QString contents;
+     if (file.open(QIODevice::ReadOnly))
+         contents = file.readAll();
+     else
+         contents = "[[Error: Could not load file " + filename + "]]";
+
+     QTextEdit *view = new QTextEdit;
+     view->setPlainText(contents);
+
+     switch(action) {
+

The handleMessage() slot interprets the message passed in as a filename that can be prepended with /print to indicate that the file should just be printed rather than loaded.

+
     case Print:
+         {
+             QPrinter printer;
+             view->print(&printer);
+             delete view;
+         }
+         break;
+
+     case Open:
+         {
+             workspace->addSubWindow(view);
+             view->setWindowTitle(message);
+             view->show();
+             emit needToShow();
+         }
+         break;
+     default:
+         break;
+     };
+ }
+

Loading the file will also activate the window.

+
 #include "main.moc"
+
+ int main(int argc, char **argv)
+ {
+     QtSingleApplication instance("File loader QtSingleApplication example", argc, argv);
+     QString message;
+     for (int a = 1; a < argc; ++a) {
+         message += argv[a];
+         if (a < argc-1)
+             message += " ";
+     }
+
+     if (instance.sendMessage(message))
+         return 0;
+

The main entry point function creates a QtSingleApplication object, and creates a message to send to a running instance of the application. If the message was sent successfully the process exits immediately.

+
     MainWindow mw;
+     mw.handleMessage(message);
+     mw.show();
+
+     QObject::connect(&instance, SIGNAL(messageReceived(const QString&)),
+                      &mw, SLOT(handleMessage(const QString&)));
+
+     instance.setActivationWindow(&mw, false);
+     QObject::connect(&mw, SIGNAL(needToShow()), &instance, SLOT(activateWindow()));
+
+     return instance.exec();
+ }
+

If the message could not be sent the application starts up. Note that false is passed to the call to setActivationWindow() to prevent automatic activation for every message received, e.g. when the application should just print a file. Instead, the message handling function determines whether activation is requested, and signals that by emitting the needToShow() signal. This is then simply connected directly to QtSingleApplication's activateWindow() slot.

+

+ + + + +
Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)Trademarks
Qt Solutions
+ diff --git a/qtsingleapplication/doc/html/qtsingleapplication-example-trivial.html b/qtsingleapplication/doc/html/qtsingleapplication-example-trivial.html new file mode 100644 index 00000000..b3a19102 --- /dev/null +++ b/qtsingleapplication/doc/html/qtsingleapplication-example-trivial.html @@ -0,0 +1,103 @@ + + + + + + A Trivial Example + + + + + + + +
  Home

A Trivial Example
+

+

The application in this example has a log-view that displays messages sent by further instances of the same application.

+

The example demonstrates the use of the QtSingleApplication class to detect and communicate with a running instance of the application using the sendMessage() API. The messageReceived() signal is used to display received messages in a QTextEdit log.

+
 /****************************************************************************
+ **
+ ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ ** All rights reserved.
+ **
+ ** Contact: Nokia Corporation (qt-info@nokia.com)
+ **
+ ** This file is part of a Qt Solutions component.
+ **
+ ** You may use this file under the terms of the BSD license as follows:
+ **
+ ** "Redistribution and use in source and binary forms, with or without
+ ** modification, are permitted provided that the following conditions are
+ ** met:
+ **   * Redistributions of source code must retain the above copyright
+ **     notice, this list of conditions and the following disclaimer.
+ **   * Redistributions in binary form must reproduce the above copyright
+ **     notice, this list of conditions and the following disclaimer in
+ **     the documentation and/or other materials provided with the
+ **     distribution.
+ **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+ **     the names of its contributors may be used to endorse or promote
+ **     products derived from this software without specific prior written
+ **     permission.
+ **
+ ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+ **
+ ****************************************************************************/
+
+ #include <qtsingleapplication.h>
+ #include <QtGui/QTextEdit>
+
+ class TextEdit : public QTextEdit
+ {
+     Q_OBJECT
+ public:
+     TextEdit(QWidget *parent = 0)
+         : QTextEdit(parent)
+     {}
+ public slots:
+     void append(const QString &str)
+     {
+         QTextEdit::append(str);
+     }
+ };
+
+ #include "main.moc"
+
+ int main(int argc, char **argv)
+ {
+     QtSingleApplication instance(argc, argv);
+

The example has only the main entry point function. A QtSingleApplication object is created immediately.

+
     if (instance.sendMessage("Wake up!"))
+         return 0;
+

If another instance of this application is already running, sendMessage() will succeed, and this instance just exits immediately.

+
     TextEdit logview;
+     logview.setReadOnly(true);
+     logview.show();
+

Otherwise the instance continues as normal and creates the user interface.

+
     instance.setActivationWindow(&logview);
+
+     QObject::connect(&instance, SIGNAL(messageReceived(const QString&)),
+                      &logview, SLOT(append(const QString&)));
+
+     return instance.exec();
+

The logview object is also set as the application's activation window. Every time a message is received, the window will be raised and activated automatically.

+

The messageReceived() signal is also connected to the QTextEdit's append() slot. Every message received from further instances of this application will be displayed in the log.

+

Finally the event loop is entered.

+

+ + + + +
Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)Trademarks
Qt Solutions
+ diff --git a/qtsingleapplication/doc/html/qtsingleapplication-members.html b/qtsingleapplication/doc/html/qtsingleapplication-members.html new file mode 100644 index 00000000..c995ce3f --- /dev/null +++ b/qtsingleapplication/doc/html/qtsingleapplication-members.html @@ -0,0 +1,235 @@ + + + + + + List of All Members for QtSingleApplication + + + + + + + +
  Home

List of All Members for QtSingleApplication

+

This is the complete list of members for QtSingleApplication, including inherited members.

+

+ +
+

+

+ + + + +
Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)Trademarks
Qt Solutions
+ diff --git a/qtsingleapplication/doc/html/qtsingleapplication-obsolete.html b/qtsingleapplication/doc/html/qtsingleapplication-obsolete.html new file mode 100644 index 00000000..0d07dfae --- /dev/null +++ b/qtsingleapplication/doc/html/qtsingleapplication-obsolete.html @@ -0,0 +1,31 @@ + + + + + + Obsolete Members for QtSingleApplication + + + + + + + +
  Home

Obsolete Members for QtSingleApplication

+

The following class members are obsolete. They are provided to keep old source code working. We strongly advise against using them in new code.

+

+

Public Functions

+ + +
void initialize ( bool dummy = true )   (obsolete)
+
+

Member Function Documentation

+

void QtSingleApplication::initialize ( bool dummy = true )

+

+ + + + +
Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)Trademarks
Qt Solutions
+ diff --git a/qtsingleapplication/doc/html/qtsingleapplication.dcf b/qtsingleapplication/doc/html/qtsingleapplication.dcf new file mode 100644 index 00000000..d81f87fb --- /dev/null +++ b/qtsingleapplication/doc/html/qtsingleapplication.dcf @@ -0,0 +1,40 @@ + + +
+
+ QtSingleApplication + activateWindow + activationWindow + id + isRunning + messageReceived + sendMessage + setActivationWindow +
+
+
+
+ QtSingleCoreApplication + id + isRunning + messageReceived + sendMessage +
+
+
+
+
+ A non-GUI example +
+
+ A Trivial Example +
+
+ Loading Documents +
+
+ Single Application +
+
+
+ diff --git a/qtsingleapplication/doc/html/qtsingleapplication.html b/qtsingleapplication/doc/html/qtsingleapplication.html new file mode 100644 index 00000000..2754a3b9 --- /dev/null +++ b/qtsingleapplication/doc/html/qtsingleapplication.html @@ -0,0 +1,162 @@ + + + + + + QtSingleApplication Class Reference + + + + + + + +
  Home

QtSingleApplication Class Reference

+

The QtSingleApplication class provides an API to detect and communicate with running instances of an application. More...

+
 #include <QtSingleApplication>

Inherits QApplication.

+ +
+ +

Public Functions

+ + + + + + + + + + + +
QtSingleApplication ( int & argc, char ** argv, bool GUIenabled = true )
QtSingleApplication ( const QString & appId, int & argc, char ** argv )
QtSingleApplication ( int & argc, char ** argv, Type type )
QtSingleApplication ( Display * dpy, Qt::HANDLE visual = 0, Qt::HANDLE cmap = 0 )
QtSingleApplication ( Display * dpy, int & argc, char ** argv, Qt::HANDLE visual = 0, Qt::HANDLE cmap = 0 )
QtSingleApplication ( Display * dpy, const QString & appId, int argc, char ** argv, Qt::HANDLE visual = 0, Qt::HANDLE cmap = 0 )
QWidget * activationWindow () const
QString id () const
bool isRunning ()
void setActivationWindow ( QWidget * aw, bool activateOnMessage = true )
+ +
+ +

Public Slots

+ + + +
void activateWindow ()
bool sendMessage ( const QString & message, int timeout = 5000 )
+ +
+ +

Signals

+ + +
void messageReceived ( const QString & message )
+ +

Additional Inherited Members

+ + +
+

Detailed Description

+

The QtSingleApplication class provides an API to detect and communicate with running instances of an application.

+

This class allows you to create applications where only one instance should be running at a time. I.e., if the user tries to launch another instance, the already running instance will be activated instead. Another usecase is a client-server system, where the first started instance will assume the role of server, and the later instances will act as clients of that server.

+

By default, the full path of the executable file is used to determine whether two processes are instances of the same application. You can also provide an explicit identifier string that will be compared instead.

+

The application should create the QtSingleApplication object early in the startup phase, and call isRunning() to find out if another instance of this application is already running. If isRunning() returns false, it means that no other instance is running, and this instance has assumed the role as the running instance. In this case, the application should continue with the initialization of the application user interface before entering the event loop with exec(), as normal.

+

The messageReceived() signal will be emitted when the running application receives messages from another instance of the same application. When a message is received it might be helpful to the user to raise the application so that it becomes visible. To facilitate this, QtSingleApplication provides the setActivationWindow() function and the activateWindow() slot.

+

If isRunning() returns true, another instance is already running. It may be alerted to the fact that another instance has started by using the sendMessage() function. Also data such as startup parameters (e.g. the name of the file the user wanted this new instance to open) can be passed to the running instance with this function. Then, the application should terminate (or enter client mode).

+

If isRunning() returns true, but sendMessage() fails, that is an indication that the running instance is frozen.

+

Here's an example that shows how to convert an existing application to use QtSingleApplication. It is very simple and does not make use of all QtSingleApplication's functionality (see the examples for that).

+
 // Original
+ int main(int argc, char **argv)
+ {
+     QApplication app(argc, argv);
+
+     MyMainWidget mmw;
+     mmw.show();
+     return app.exec();
+ }
+
+ // Single instance
+ int main(int argc, char **argv)
+ {
+     QtSingleApplication app(argc, argv);
+
+     if (app.isRunning())
+         return !app.sendMessage(someDataString);
+
+     MyMainWidget mmw;
+     app.setActivationWindow(&mmw);
+     mmw.show();
+     return app.exec();
+ }
+

Once this QtSingleApplication instance is destroyed (normally when the process exits or crashes), when the user next attempts to run the application this instance will not, of course, be encountered. The next instance to call isRunning() or sendMessage() will assume the role as the new running instance.

+

For console (non-GUI) applications, QtSingleCoreApplication may be used instead of this class, to avoid the dependency on the QtGui library.

+

See also QtSingleCoreApplication.

+
+

Member Function Documentation

+

QtSingleApplication::QtSingleApplication ( int & argc, char ** argv, bool GUIenabled = true )

+

Creates a QtSingleApplication object. The application identifier will be QCoreApplication::applicationFilePath(). argc, argv, and GUIenabled are passed on to the QAppliation constructor.

+

If you are creating a console application (i.e. setting GUIenabled to false), you may consider using QtSingleCoreApplication instead.

+

QtSingleApplication::QtSingleApplication ( const QString & appId, int & argc, char ** argv )

+

Creates a QtSingleApplication object with the application identifier appId. argc and argv are passed on to the QAppliation constructor.

+

QtSingleApplication::QtSingleApplication ( int & argc, char ** argv, Type type )

+

Creates a QtSingleApplication object. The application identifier will be QCoreApplication::applicationFilePath(). argc, argv, and type are passed on to the QAppliation constructor.

+

QtSingleApplication::QtSingleApplication ( Display * dpy, Qt::HANDLE visual = 0, Qt::HANDLE cmap = 0 )

+

Special constructor for X11, ref. the documentation of QApplication's corresponding constructor. The application identifier will be QCoreApplication::applicationFilePath(). dpy, visual, and cmap are passed on to the QApplication constructor.

+

QtSingleApplication::QtSingleApplication ( Display * dpy, int & argc, char ** argv, Qt::HANDLE visual = 0, Qt::HANDLE cmap = 0 )

+

Special constructor for X11, ref. the documentation of QApplication's corresponding constructor. The application identifier will be QCoreApplication::applicationFilePath(). dpy, argc, argv, visual, and cmap are passed on to the QApplication constructor.

+

QtSingleApplication::QtSingleApplication ( Display * dpy, const QString & appId, int argc, char ** argv, Qt::HANDLE visual = 0, Qt::HANDLE cmap = 0 )

+

Special constructor for X11, ref. the documentation of QApplication's corresponding constructor. The application identifier will be appId. dpy, argc, argv, visual, and cmap are passed on to the QApplication constructor.

+

void QtSingleApplication::activateWindow ()   [slot]

+

De-minimizes, raises, and activates this application's activation window. This function does nothing if no activation window has been set.

+

This is a convenience function to show the user that this application instance has been activated when he has tried to start another instance.

+

This function should typically be called in response to the messageReceived() signal. By default, that will happen automatically, if an activation window has been set.

+

See also setActivationWindow(), messageReceived(), and initialize().

+

QWidget * QtSingleApplication::activationWindow () const

+

Returns the applications activation window if one has been set by calling setActivationWindow(), otherwise returns 0.

+

See also setActivationWindow().

+

QString QtSingleApplication::id () const

+

Returns the application identifier. Two processes with the same identifier will be regarded as instances of the same application.

+

bool QtSingleApplication::isRunning ()

+

Returns true if another instance of this application is running; otherwise false.

+

This function does not find instances of this application that are being run by a different user (on Windows: that are running in another session).

+

See also sendMessage().

+

void QtSingleApplication::messageReceived ( const QString & message )   [signal]

+

This signal is emitted when the current instance receives a message from another instance of this application.

+

See also sendMessage(), setActivationWindow(), and activateWindow().

+

bool QtSingleApplication::sendMessage ( const QString & message, int timeout = 5000 )   [slot]

+

Tries to send the text message to the currently running instance. The QtSingleApplication object in the running instance will emit the messageReceived() signal when it receives the message.

+

This function returns true if the message has been sent to, and processed by, the current instance. If there is no instance currently running, or if the running instance fails to process the message within timeout milliseconds, this function return false.

+

See also isRunning() and messageReceived().

+

void QtSingleApplication::setActivationWindow ( QWidget * aw, bool activateOnMessage = true )

+

Sets the activation window of this application to aw. The activation window is the widget that will be activated by activateWindow(). This is typically the application's main window.

+

If activateOnMessage is true (the default), the window will be activated automatically every time a message is received, just prior to the messageReceived() signal being emitted.

+

See also activationWindow(), activateWindow(), and messageReceived().

+

+ + + + +
Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)Trademarks
Qt Solutions
+ diff --git a/qtsingleapplication/doc/html/qtsingleapplication.index b/qtsingleapplication/doc/html/qtsingleapplication.index new file mode 100644 index 00000000..56052c2a --- /dev/null +++ b/qtsingleapplication/doc/html/qtsingleapplication.index @@ -0,0 +1,90 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/qtsingleapplication/doc/html/qtsingleapplication.qhp b/qtsingleapplication/doc/html/qtsingleapplication.qhp new file mode 100644 index 00000000..ff42d9df --- /dev/null +++ b/qtsingleapplication/doc/html/qtsingleapplication.qhp @@ -0,0 +1,53 @@ + + + com.nokia.qtsolutions.qtsingleapplication_head + qdoc + + qt + solutions + qtsingleapplication + + + qt + solutions + qtsingleapplication + +
+
+
+
+
+
+ + + + + + + + + + + + + + + + + + + + + + + qtsingleapplication.html + index.html + qtsingleapplication-example-trivial.html + qtsinglecoreapplication.html + qtsingleapplication-example-loader.html + qtsinglecoreapplication-example-console.html + classic.css + images/qt-logo.png + + + diff --git a/qtsingleapplication/doc/html/qtsinglecoreapplication-example-console.html b/qtsingleapplication/doc/html/qtsinglecoreapplication-example-console.html new file mode 100644 index 00000000..5c4f6426 --- /dev/null +++ b/qtsingleapplication/doc/html/qtsinglecoreapplication-example-console.html @@ -0,0 +1,120 @@ + + + + + + A non-GUI example + + + + + + + +
  Home

A non-GUI example
+

+

This example shows how to use the single-application functionality in a console application. It does not require the QtGui library at all.

+

The only differences from the GUI application usage demonstrated in the other examples are:

+

1) The .pro file should include qtsinglecoreapplication.pri instead of qtsingleapplication.pri

+

2) The class name is QtSingleCoreApplication instead of QtSingleApplication.

+

3) No calls are made regarding window activation, for obvious reasons.

+

console.pro:

+
 TEMPLATE   = app
+ CONFIG    += console
+ SOURCES   += main.cpp
+ include(../../src/qtsinglecoreapplication.pri)
+ QT -= gui
+

main.cpp:

+
 /****************************************************************************
+ **
+ ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ ** All rights reserved.
+ **
+ ** Contact: Nokia Corporation (qt-info@nokia.com)
+ **
+ ** This file is part of a Qt Solutions component.
+ **
+ ** You may use this file under the terms of the BSD license as follows:
+ **
+ ** "Redistribution and use in source and binary forms, with or without
+ ** modification, are permitted provided that the following conditions are
+ ** met:
+ **   * Redistributions of source code must retain the above copyright
+ **     notice, this list of conditions and the following disclaimer.
+ **   * Redistributions in binary form must reproduce the above copyright
+ **     notice, this list of conditions and the following disclaimer in
+ **     the documentation and/or other materials provided with the
+ **     distribution.
+ **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+ **     the names of its contributors may be used to endorse or promote
+ **     products derived from this software without specific prior written
+ **     permission.
+ **
+ ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+ **
+ ****************************************************************************/
+
+ #include "qtsinglecoreapplication.h"
+ #include <QtCore/QDebug>
+
+ void report(const QString& msg)
+ {
+     qDebug("[%i] %s", (int)QCoreApplication::applicationPid(), qPrintable(msg));
+ }
+
+ class MainClass : public QObject
+ {
+     Q_OBJECT
+ public:
+     MainClass()
+         : QObject()
+         {}
+
+ public slots:
+     void handleMessage(const QString& message)
+         {
+             report( "Message received: \"" + message + "\"");
+         }
+ };
+
+ int main(int argc, char **argv)
+ {
+     report("Starting up");
+
+     QtSingleCoreApplication app(argc, argv);
+
+     if (app.isRunning()) {
+         QString msg(QString("Hi master, I am %1.").arg(QCoreApplication::applicationPid()));
+         bool sentok = app.sendMessage(msg, 2000);
+         QString rep("Another instance is running, so I will exit.");
+         rep += sentok ? " Message sent ok." : " Message sending failed; the other instance may be frozen.";
+         report(rep);
+         return 0;
+     } else {
+         report("No other instance is running; so I will.");
+         MainClass mainObj;
+         QObject::connect(&app, SIGNAL(messageReceived(const QString&)),
+                          &mainObj, SLOT(handleMessage(const QString&)));
+         return app.exec();
+     }
+ }
+
+ #include "main.moc"
+

+ + + + +
Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)Trademarks
Qt Solutions
+ diff --git a/qtsingleapplication/doc/html/qtsinglecoreapplication-members.html b/qtsingleapplication/doc/html/qtsinglecoreapplication-members.html new file mode 100644 index 00000000..69fb8581 --- /dev/null +++ b/qtsingleapplication/doc/html/qtsinglecoreapplication-members.html @@ -0,0 +1,126 @@ + + + + + + List of All Members for QtSingleCoreApplication + + + + + + + +
  Home

List of All Members for QtSingleCoreApplication

+

This is the complete list of members for QtSingleCoreApplication, including inherited members.

+

+ +
+

+

+ + + + +
Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)Trademarks
Qt Solutions
+ diff --git a/qtsingleapplication/doc/html/qtsinglecoreapplication.html b/qtsingleapplication/doc/html/qtsinglecoreapplication.html new file mode 100644 index 00000000..a20cf2f4 --- /dev/null +++ b/qtsingleapplication/doc/html/qtsinglecoreapplication.html @@ -0,0 +1,98 @@ + + + + + + QtSingleCoreApplication Class Reference + + + + + + + +
  Home

QtSingleCoreApplication Class Reference

+

A variant of the QtSingleApplication class for non-GUI applications. More...

+
 #include <QtSingleCoreApplication>

Inherits QCoreApplication.

+ +
+ +

Public Functions

+ + + + + +
QtSingleCoreApplication ( int & argc, char ** argv )
QtSingleCoreApplication ( const QString & appId, int & argc, char ** argv )
QString id () const
bool isRunning ()
+ +
+ +

Public Slots

+ + +
bool sendMessage ( const QString & message, int timeout = 5000 )
+ +
+ +

Signals

+ + +
void messageReceived ( const QString & message )
+ +

Additional Inherited Members

+ + +
+

Detailed Description

+

A variant of the QtSingleApplication class for non-GUI applications.

+

This class is a variant of QtSingleApplication suited for use in console (non-GUI) applications. It is an extension of QCoreApplication (instead of QApplication). It does not require the QtGui library.

+

The API and usage is identical to QtSingleApplication, except that functions relating to the "activation window" are not present, for obvious reasons. Please refer to the QtSingleApplication documentation for explanation of the usage.

+

A QtSingleCoreApplication instance can communicate to a QtSingleApplication instance if they share the same application id. Hence, this class can be used to create a light-weight command-line tool that sends commands to a GUI application.

+

See also QtSingleApplication.

+
+

Member Function Documentation

+

QtSingleCoreApplication::QtSingleCoreApplication ( int & argc, char ** argv )

+

Creates a QtSingleCoreApplication object. The application identifier will be QCoreApplication::applicationFilePath(). argc and argv are passed on to the QCoreAppliation constructor.

+

QtSingleCoreApplication::QtSingleCoreApplication ( const QString & appId, int & argc, char ** argv )

+

Creates a QtSingleCoreApplication object with the application identifier appId. argc and argv are passed on to the QCoreAppliation constructor.

+

QString QtSingleCoreApplication::id () const

+

Returns the application identifier. Two processes with the same identifier will be regarded as instances of the same application.

+

bool QtSingleCoreApplication::isRunning ()

+

Returns true if another instance of this application is running; otherwise false.

+

This function does not find instances of this application that are being run by a different user (on Windows: that are running in another session).

+

See also sendMessage().

+

void QtSingleCoreApplication::messageReceived ( const QString & message )   [signal]

+

This signal is emitted when the current instance receives a message from another instance of this application.

+

See also sendMessage().

+

bool QtSingleCoreApplication::sendMessage ( const QString & message, int timeout = 5000 )   [slot]

+

Tries to send the text message to the currently running instance. The QtSingleCoreApplication object in the running instance will emit the messageReceived() signal when it receives the message.

+

This function returns true if the message has been sent to, and processed by, the current instance. If there is no instance currently running, or if the running instance fails to process the message within timeout milliseconds, this function return false.

+

See also isRunning() and messageReceived().

+

+ + + + +
Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)Trademarks
Qt Solutions
+ diff --git a/qtsingleapplication/doc/images/qt-logo.png b/qtsingleapplication/doc/images/qt-logo.png new file mode 100644 index 00000000..794162f5 Binary files /dev/null and b/qtsingleapplication/doc/images/qt-logo.png differ diff --git a/qtsingleapplication/doc/index.qdoc b/qtsingleapplication/doc/index.qdoc new file mode 100644 index 00000000..9c3308d8 --- /dev/null +++ b/qtsingleapplication/doc/index.qdoc @@ -0,0 +1,47 @@ +/*! + \page index.html + \title Single Application + + \section1 Description + + The QtSingleApplication component provides support + for applications that can be only started once per user. + + + + For some applications it is useful or even critical that they are started + only once by any user. Future attempts to start the application should + activate any already running instance, and possibly perform requested + actions, e.g. loading a file, in that instance. + + The QtSingleApplication class provides an interface to detect a running + instance, and to send command strings to that instance. + For console (non-GUI) applications, the QtSingleCoreApplication variant is provided, which avoids dependency on QtGui. + + + + + \section1 Classes + \list + \i QtSingleApplication \i QtSingleCoreApplication\endlist + + \section1 Examples + \list + \i \link qtsingleapplication-example-trivial.html A Trivial Example \endlink \i \link qtsingleapplication-example-loader.html Loading Documents \endlink \i \link qtsinglecoreapplication-example-console.html A Non-GUI Example \endlink \endlist + + + + + + + \section1 Tested platforms + \list + \i Qt 4.4, 4.5 / Windows XP / MSVC.NET 2005 + \i Qt 4.4, 4.5 / Linux / gcc + \i Qt 4.4, 4.5 / MacOS X 10.5 / gcc + \endlist + + + + + */ \ No newline at end of file diff --git a/qtsingleapplication/examples/console/console.pro b/qtsingleapplication/examples/console/console.pro new file mode 100644 index 00000000..e0390e23 --- /dev/null +++ b/qtsingleapplication/examples/console/console.pro @@ -0,0 +1,5 @@ +TEMPLATE = app +CONFIG += console +SOURCES += main.cpp +include(../../src/qtsinglecoreapplication.pri) +QT -= gui diff --git a/qtsingleapplication/examples/console/console.qdoc b/qtsingleapplication/examples/console/console.qdoc new file mode 100644 index 00000000..7bef07cb --- /dev/null +++ b/qtsingleapplication/examples/console/console.qdoc @@ -0,0 +1,64 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + +/*! \page qtsinglecoreapplication-example-console.html + \title A non-GUI example + + This example shows how to use the single-application functionality + in a console application. It does not require the \c QtGui library + at all. + + The only differences from the GUI application usage demonstrated + in the other examples are: + + 1) The \c.pro file should include \c qtsinglecoreapplication.pri + instead of \c qtsingleapplication.pri + + 2) The class name is \c QtSingleCoreApplication instead of \c + QtSingleApplication. + + 3) No calls are made regarding window activation, for obvious reasons. + + console.pro: + \quotefile console/console.pro + + main.cpp: + \quotefile console/main.cpp + +*/ diff --git a/qtsingleapplication/examples/console/main.cpp b/qtsingleapplication/examples/console/main.cpp new file mode 100644 index 00000000..de4816a8 --- /dev/null +++ b/qtsingleapplication/examples/console/main.cpp @@ -0,0 +1,88 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + + +#include "qtsinglecoreapplication.h" +#include + + +void report(const QString& msg) +{ + qDebug("[%i] %s", (int)QCoreApplication::applicationPid(), qPrintable(msg)); +} + +class MainClass : public QObject +{ + Q_OBJECT +public: + MainClass() + : QObject() + {} + +public slots: + void handleMessage(const QString& message) + { + report( "Message received: \"" + message + "\""); + } +}; + +int main(int argc, char **argv) +{ + report("Starting up"); + + QtSingleCoreApplication app(argc, argv); + + if (app.isRunning()) { + QString msg(QString("Hi master, I am %1.").arg(QCoreApplication::applicationPid())); + bool sentok = app.sendMessage(msg, 2000); + QString rep("Another instance is running, so I will exit."); + rep += sentok ? " Message sent ok." : " Message sending failed; the other instance may be frozen."; + report(rep); + return 0; + } else { + report("No other instance is running; so I will."); + MainClass mainObj; + QObject::connect(&app, SIGNAL(messageReceived(const QString&)), + &mainObj, SLOT(handleMessage(const QString&))); + return app.exec(); + } +} + + +#include "main.moc" diff --git a/qtsingleapplication/examples/examples.pro b/qtsingleapplication/examples/examples.pro new file mode 100644 index 00000000..36b8fd38 --- /dev/null +++ b/qtsingleapplication/examples/examples.pro @@ -0,0 +1,4 @@ +TEMPLATE = subdirs +SUBDIRS = trivial \ + loader \ + console diff --git a/qtsingleapplication/examples/loader/file1.qsl b/qtsingleapplication/examples/loader/file1.qsl new file mode 100644 index 00000000..50fcd26d --- /dev/null +++ b/qtsingleapplication/examples/loader/file1.qsl @@ -0,0 +1 @@ +File 1 diff --git a/qtsingleapplication/examples/loader/file2.qsl b/qtsingleapplication/examples/loader/file2.qsl new file mode 100644 index 00000000..4475433e --- /dev/null +++ b/qtsingleapplication/examples/loader/file2.qsl @@ -0,0 +1 @@ +File 2 diff --git a/qtsingleapplication/examples/loader/loader.pro b/qtsingleapplication/examples/loader/loader.pro new file mode 100644 index 00000000..673497a4 --- /dev/null +++ b/qtsingleapplication/examples/loader/loader.pro @@ -0,0 +1,5 @@ +TEMPLATE = app + +include(../../src/qtsingleapplication.pri) + +SOURCES += main.cpp diff --git a/qtsingleapplication/examples/loader/loader.qdoc b/qtsingleapplication/examples/loader/loader.qdoc new file mode 100644 index 00000000..2ae59e32 --- /dev/null +++ b/qtsingleapplication/examples/loader/loader.qdoc @@ -0,0 +1,80 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + +/*! \page qtsingleapplication-example-loader.html + \title Loading Documents + + The application in this example loads or prints the documents + passed as commandline parameters to further instances of this + application. + + \quotefromfile loader/main.cpp + \printuntil }; + The user interface in this application is a QMainWindow subclass + with a QMdiArea as the central widget. It implements a slot + \c handleMessage() that will be connected to the messageReceived() + signal of the QtSingleApplication class. + + \printuntil } + The MainWindow constructor creates a minimal user interface. + + \printto case Print: + The handleMessage() slot interprets the message passed in as a + filename that can be prepended with \e /print to indicate that + the file should just be printed rather than loaded. + + \printto #include + Loading the file will also activate the window. + + \printto mw + The \c main entry point function creates a QtSingleApplication + object, and creates a message to send to a running instance + of the application. If the message was sent successfully the + process exits immediately. + + \printuntil } + If the message could not be sent the application starts up. Note + that \c false is passed to the call to setActivationWindow() to + prevent automatic activation for every message received, e.g. when + the application should just print a file. Instead, the message + handling function determines whether activation is requested, and + signals that by emitting the needToShow() signal. This is then + simply connected directly to QtSingleApplication's + activateWindow() slot. +*/ diff --git a/qtsingleapplication/examples/loader/main.cpp b/qtsingleapplication/examples/loader/main.cpp new file mode 100644 index 00000000..7bc56868 --- /dev/null +++ b/qtsingleapplication/examples/loader/main.cpp @@ -0,0 +1,151 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + +#include +#include +#include +#include +#include +#include +#include +#include + +class MainWindow : public QMainWindow +{ + Q_OBJECT +public: + MainWindow(); + +public slots: + void handleMessage(const QString& message); + +signals: + void needToShow(); + +private: + QMdiArea *workspace; +}; + +MainWindow::MainWindow() +{ + workspace = new QMdiArea(this); + + setCentralWidget(workspace); +} + +void MainWindow::handleMessage(const QString& message) +{ + enum Action { + Nothing, + Open, + Print + } action; + + action = Nothing; + QString filename = message; + if (message.toLower().startsWith("/print ")) { + filename = filename.mid(7); + action = Print; + } else if (!message.isEmpty()) { + action = Open; + } + if (action == Nothing) { + emit needToShow(); + return; + } + + QFile file(filename); + QString contents; + if (file.open(QIODevice::ReadOnly)) + contents = file.readAll(); + else + contents = "[[Error: Could not load file " + filename + "]]"; + + QTextEdit *view = new QTextEdit; + view->setPlainText(contents); + + switch(action) { + case Print: + { + QPrinter printer; + view->print(&printer); + delete view; + } + break; + + case Open: + { + workspace->addSubWindow(view); + view->setWindowTitle(message); + view->show(); + emit needToShow(); + } + break; + default: + break; + }; +} + +#include "main.moc" + +int main(int argc, char **argv) +{ + QtSingleApplication instance("File loader QtSingleApplication example", argc, argv); + QString message; + for (int a = 1; a < argc; ++a) { + message += argv[a]; + if (a < argc-1) + message += " "; + } + + if (instance.sendMessage(message)) + return 0; + + MainWindow mw; + mw.handleMessage(message); + mw.show(); + + QObject::connect(&instance, SIGNAL(messageReceived(const QString&)), + &mw, SLOT(handleMessage(const QString&))); + + instance.setActivationWindow(&mw, false); + QObject::connect(&mw, SIGNAL(needToShow()), &instance, SLOT(activateWindow())); + + return instance.exec(); +} diff --git a/qtsingleapplication/examples/trivial/main.cpp b/qtsingleapplication/examples/trivial/main.cpp new file mode 100644 index 00000000..8552fe3e --- /dev/null +++ b/qtsingleapplication/examples/trivial/main.cpp @@ -0,0 +1,77 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + +#include +#include + +class TextEdit : public QTextEdit +{ + Q_OBJECT +public: + TextEdit(QWidget *parent = 0) + : QTextEdit(parent) + {} +public slots: + void append(const QString &str) + { + QTextEdit::append(str); + } +}; + +#include "main.moc" + + + +int main(int argc, char **argv) +{ + QtSingleApplication instance(argc, argv); + if (instance.sendMessage("Wake up!")) + return 0; + + TextEdit logview; + logview.setReadOnly(true); + logview.show(); + + instance.setActivationWindow(&logview); + + QObject::connect(&instance, SIGNAL(messageReceived(const QString&)), + &logview, SLOT(append(const QString&))); + + return instance.exec(); +} diff --git a/qtsingleapplication/examples/trivial/trivial.pro b/qtsingleapplication/examples/trivial/trivial.pro new file mode 100644 index 00000000..673497a4 --- /dev/null +++ b/qtsingleapplication/examples/trivial/trivial.pro @@ -0,0 +1,5 @@ +TEMPLATE = app + +include(../../src/qtsingleapplication.pri) + +SOURCES += main.cpp diff --git a/qtsingleapplication/examples/trivial/trivial.qdoc b/qtsingleapplication/examples/trivial/trivial.qdoc new file mode 100644 index 00000000..3185199c --- /dev/null +++ b/qtsingleapplication/examples/trivial/trivial.qdoc @@ -0,0 +1,75 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + +/*! \page qtsingleapplication-example-trivial.html + \title A Trivial Example + + The application in this example has a log-view that displays + messages sent by further instances of the same application. + + The example demonstrates the use of the QtSingleApplication + class to detect and communicate with a running instance of + the application using the sendMessage() API. The messageReceived() + signal is used to display received messages in a QTextEdit log. + + \quotefromfile trivial/main.cpp + \printuntil instance + The example has only the \c main entry point function. + A QtSingleApplication object is created immediately. + + \printuntil return + If another instance of this application is already running, + sendMessage() will succeed, and this instance just exits + immediately. + + \printuntil show() + Otherwise the instance continues as normal and creates the + user interface. + + \printuntil return instance.exec(); + The \c logview object is also set as the application's activation + window. Every time a message is received, the window will be raised + and activated automatically. + + The messageReceived() signal is also connected to the QTextEdit's + append() slot. Every message received from further instances of + this application will be displayed in the log. + + Finally the event loop is entered. +*/ diff --git a/qtsingleapplication/qtsingleapplication.pro b/qtsingleapplication/qtsingleapplication.pro new file mode 100644 index 00000000..07257c5d --- /dev/null +++ b/qtsingleapplication/qtsingleapplication.pro @@ -0,0 +1,5 @@ +TEMPLATE=subdirs +CONFIG += ordered +include(common.pri) +qtsingleapplication-uselib:SUBDIRS=buildlib +SUBDIRS+=examples diff --git a/qtsingleapplication/source.txt b/qtsingleapplication/source.txt new file mode 100644 index 00000000..fa6ec656 --- /dev/null +++ b/qtsingleapplication/source.txt @@ -0,0 +1,3 @@ +This package was copied from the cloned qtsolutions git for GoldenDict: + + git clone git://gitorious.org/qt-solutions/qt-solutions.git diff --git a/qtsingleapplication/src/QtLockedFile b/qtsingleapplication/src/QtLockedFile new file mode 100644 index 00000000..16b48ba9 --- /dev/null +++ b/qtsingleapplication/src/QtLockedFile @@ -0,0 +1 @@ +#include "qtlockedfile.h" diff --git a/qtsingleapplication/src/QtSingleApplication b/qtsingleapplication/src/QtSingleApplication new file mode 100644 index 00000000..d111bf72 --- /dev/null +++ b/qtsingleapplication/src/QtSingleApplication @@ -0,0 +1 @@ +#include "qtsingleapplication.h" diff --git a/qtsingleapplication/src/qtlocalpeer.cpp b/qtsingleapplication/src/qtlocalpeer.cpp new file mode 100644 index 00000000..382d182d --- /dev/null +++ b/qtsingleapplication/src/qtlocalpeer.cpp @@ -0,0 +1,199 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + + +#include "qtlocalpeer.h" +#include +#include + +#if defined(Q_OS_WIN) +#include +#include +typedef BOOL(WINAPI*PProcessIdToSessionId)(DWORD,DWORD*); +static PProcessIdToSessionId pProcessIdToSessionId = 0; +#endif +#if defined(Q_OS_UNIX) +#include +#endif + +namespace QtLP_Private { +#include "qtlockedfile.cpp" +#if defined(Q_OS_WIN) +#include "qtlockedfile_win.cpp" +#else +#include "qtlockedfile_unix.cpp" +#endif +} + +const char* QtLocalPeer::ack = "ack"; + +QtLocalPeer::QtLocalPeer(QObject* parent, const QString &appId) + : QObject(parent), id(appId) +{ + QString prefix = id; + if (id.isEmpty()) { + id = QCoreApplication::applicationFilePath(); +#if defined(Q_OS_WIN) + id = id.toLower(); +#endif + prefix = id.section(QLatin1Char('/'), -1); + } + prefix.remove(QRegExp("[^a-zA-Z]")); + prefix.truncate(6); + + QByteArray idc = id.toUtf8(); + quint16 idNum = qChecksum(idc.constData(), idc.size()); + socketName = QLatin1String("qtsingleapp-") + prefix + + QLatin1Char('-') + QString::number(idNum, 16); + +#if defined(Q_OS_WIN) + if (!pProcessIdToSessionId) { + QLibrary lib("kernel32"); + pProcessIdToSessionId = (PProcessIdToSessionId)lib.resolve("ProcessIdToSessionId"); + } + if (pProcessIdToSessionId) { + DWORD sessionId = 0; + pProcessIdToSessionId(GetCurrentProcessId(), &sessionId); + socketName += QLatin1Char('-') + QString::number(sessionId, 16); + } +#else + socketName += QLatin1Char('-') + QString::number(::getuid(), 16); +#endif + + server = new QLocalServer(this); + QString lockName = QDir(QDir::tempPath()).absolutePath() + + QLatin1Char('/') + socketName + + QLatin1String("-lockfile"); + lockFile.setFileName(lockName); + lockFile.open(QIODevice::ReadWrite); +} + + + +bool QtLocalPeer::isClient() +{ + if (lockFile.isLocked()) + return false; + + if (!lockFile.lock(QtLP_Private::QtLockedFile::WriteLock, false)) + return true; + + bool res = server->listen(socketName); +#if defined(Q_OS_UNIX) && (QT_VERSION >= QT_VERSION_CHECK(4,5,0)) + // ### Workaround + if (!res && server->serverError() == QAbstractSocket::AddressInUseError) { + QFile::remove(QDir::cleanPath(QDir::tempPath())+QLatin1Char('/')+socketName); + res = server->listen(socketName); + } +#endif + if (!res) + qWarning("QtSingleCoreApplication: listen on local socket failed, %s", qPrintable(server->errorString())); + QObject::connect(server, SIGNAL(newConnection()), SLOT(receiveConnection())); + return false; +} + + +bool QtLocalPeer::sendMessage(const QString &message, int timeout) +{ + if (!isClient()) + return false; + + QLocalSocket socket; + bool connOk = false; + for(int i = 0; i < 2; i++) { + // Try twice, in case the other instance is just starting up + socket.connectToServer(socketName); + connOk = socket.waitForConnected(timeout/2); + if (connOk || i) + break; + int ms = 250; +#if defined(Q_OS_WIN) + Sleep(DWORD(ms)); +#else + struct timespec ts = { ms / 1000, (ms % 1000) * 1000 * 1000 }; + nanosleep(&ts, NULL); +#endif + } + if (!connOk) + return false; + + QByteArray uMsg(message.toUtf8()); + QDataStream ds(&socket); + ds.writeBytes(uMsg.constData(), uMsg.size()); + bool res = socket.waitForBytesWritten(timeout); + if (res) { + res &= socket.waitForReadyRead(timeout); // wait for ack + if (res) + res &= (socket.read(qstrlen(ack)) == ack); + } + return res; +} + + +void QtLocalPeer::receiveConnection() +{ + QLocalSocket* socket = server->nextPendingConnection(); + if (!socket) + return; + + while (socket->bytesAvailable() < (int)sizeof(quint32)) + socket->waitForReadyRead(); + QDataStream ds(socket); + QByteArray uMsg; + quint32 remaining; + ds >> remaining; + uMsg.resize(remaining); + int got = 0; + char* uMsgBuf = uMsg.data(); + do { + got = ds.readRawData(uMsgBuf, remaining); + remaining -= got; + uMsgBuf += got; + } while (remaining && got >= 0 && socket->waitForReadyRead(2000)); + if (got < 0) { + qWarning("QtLocalPeer: Message reception failed %s", socket->errorString().toLatin1().constData()); + delete socket; + return; + } + QString message(QString::fromUtf8(uMsg)); + socket->write(ack, qstrlen(ack)); + socket->waitForBytesWritten(1000); + delete socket; + emit messageReceived(message); //### (might take a long time to return) +} diff --git a/qtsingleapplication/src/qtlocalpeer.h b/qtsingleapplication/src/qtlocalpeer.h new file mode 100644 index 00000000..869af2ac --- /dev/null +++ b/qtsingleapplication/src/qtlocalpeer.h @@ -0,0 +1,72 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + + +#include +#include +#include + +#include "qtlockedfile.h" + +class QtLocalPeer : public QObject +{ + Q_OBJECT + +public: + QtLocalPeer(QObject *parent = 0, const QString &appId = QString()); + bool isClient(); + bool sendMessage(const QString &message, int timeout); + QString applicationId() const + { return id; } + +Q_SIGNALS: + void messageReceived(const QString &message); + +protected Q_SLOTS: + void receiveConnection(); + +protected: + QString id; + QString socketName; + QLocalServer* server; + QtLP_Private::QtLockedFile lockFile; + +private: + static const char* ack; +}; diff --git a/qtsingleapplication/src/qtlockedfile.cpp b/qtsingleapplication/src/qtlockedfile.cpp new file mode 100644 index 00000000..3e73ba65 --- /dev/null +++ b/qtsingleapplication/src/qtlockedfile.cpp @@ -0,0 +1,192 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + +#include "qtlockedfile.h" + +/*! + \class QtLockedFile + + \brief The QtLockedFile class extends QFile with advisory locking + functions. + + A file may be locked in read or write mode. Multiple instances of + \e QtLockedFile, created in multiple processes running on the same + machine, may have a file locked in read mode. Exactly one instance + may have it locked in write mode. A read and a write lock cannot + exist simultaneously on the same file. + + The file locks are advisory. This means that nothing prevents + another process from manipulating a locked file using QFile or + file system functions offered by the OS. Serialization is only + guaranteed if all processes that access the file use + QLockedFile. Also, while holding a lock on a file, a process + must not open the same file again (through any API), or locks + can be unexpectedly lost. + + The lock provided by an instance of \e QtLockedFile is released + whenever the program terminates. This is true even when the + program crashes and no destructors are called. +*/ + +/*! \enum QtLockedFile::LockMode + + This enum describes the available lock modes. + + \value ReadLock A read lock. + \value WriteLock A write lock. + \value NoLock Neither a read lock nor a write lock. +*/ + +/*! + Constructs an unlocked \e QtLockedFile object. This constructor + behaves in the same way as \e QFile::QFile(). + + \sa QFile::QFile() +*/ +QtLockedFile::QtLockedFile() + : QFile() +{ +#ifdef Q_OS_WIN + wmutex = 0; + rmutex = 0; +#endif + m_lock_mode = NoLock; +} + +/*! + Constructs an unlocked QtLockedFile object with file \a name. This + constructor behaves in the same way as \e QFile::QFile(const + QString&). + + \sa QFile::QFile() +*/ +QtLockedFile::QtLockedFile(const QString &name) + : QFile(name) +{ +#ifdef Q_OS_WIN + wmutex = 0; + rmutex = 0; +#endif + m_lock_mode = NoLock; +} + +/*! + Opens the file in OpenMode \a mode. + + This is identical to QFile::open(), with the one exception that the + Truncate mode flag is disallowed. Truncation would conflict with the + advisory file locking, since the file would be modified before the + write lock is obtained. If truncation is required, use resize(0) + after obtaining the write lock. + + Returns true if successful; otherwise false. + + \sa QFile::open(), QFile::resize() +*/ +bool QtLockedFile::open(OpenMode mode) +{ + if (mode & QIODevice::Truncate) { + qWarning("QtLockedFile::open(): Truncate mode not allowed."); + return false; + } + return QFile::open(mode); +} + +/*! + Returns \e true if this object has a in read or write lock; + otherwise returns \e false. + + \sa lockMode() +*/ +bool QtLockedFile::isLocked() const +{ + return m_lock_mode != NoLock; +} + +/*! + Returns the type of lock currently held by this object, or \e + QtLockedFile::NoLock. + + \sa isLocked() +*/ +QtLockedFile::LockMode QtLockedFile::lockMode() const +{ + return m_lock_mode; +} + +/*! + \fn bool QtLockedFile::lock(LockMode mode, bool block = true) + + Obtains a lock of type \a mode. The file must be opened before it + can be locked. + + If \a block is true, this function will block until the lock is + aquired. If \a block is false, this function returns \e false + immediately if the lock cannot be aquired. + + If this object already has a lock of type \a mode, this function + returns \e true immediately. If this object has a lock of a + different type than \a mode, the lock is first released and then a + new lock is obtained. + + This function returns \e true if, after it executes, the file is + locked by this object, and \e false otherwise. + + \sa unlock(), isLocked(), lockMode() +*/ + +/*! + \fn bool QtLockedFile::unlock() + + Releases a lock. + + If the object has no lock, this function returns immediately. + + This function returns \e true if, after it executes, the file is + not locked by this object, and \e false otherwise. + + \sa lock(), isLocked(), lockMode() +*/ + +/*! + \fn QtLockedFile::~QtLockedFile() + + Destroys the \e QtLockedFile object. If any locks were held, they + are released. +*/ diff --git a/qtsingleapplication/src/qtlockedfile.h b/qtsingleapplication/src/qtlockedfile.h new file mode 100644 index 00000000..07a42bff --- /dev/null +++ b/qtsingleapplication/src/qtlockedfile.h @@ -0,0 +1,96 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + +#ifndef QTLOCKEDFILE_H +#define QTLOCKEDFILE_H + +#include +#ifdef Q_OS_WIN +#include +#endif + +#if defined(Q_WS_WIN) +# if !defined(QT_QTLOCKEDFILE_EXPORT) && !defined(QT_QTLOCKEDFILE_IMPORT) +# define QT_QTLOCKEDFILE_EXPORT +# elif defined(QT_QTLOCKEDFILE_IMPORT) +# if defined(QT_QTLOCKEDFILE_EXPORT) +# undef QT_QTLOCKEDFILE_EXPORT +# endif +# define QT_QTLOCKEDFILE_EXPORT __declspec(dllimport) +# elif defined(QT_QTLOCKEDFILE_EXPORT) +# undef QT_QTLOCKEDFILE_EXPORT +# define QT_QTLOCKEDFILE_EXPORT __declspec(dllexport) +# endif +#else +# define QT_QTLOCKEDFILE_EXPORT +#endif + +namespace QtLP_Private { + +class QT_QTLOCKEDFILE_EXPORT QtLockedFile : public QFile +{ +public: + enum LockMode { NoLock = 0, ReadLock, WriteLock }; + + QtLockedFile(); + QtLockedFile(const QString &name); + ~QtLockedFile(); + + bool open(OpenMode mode); + + bool lock(LockMode mode, bool block = true); + bool unlock(); + bool isLocked() const; + LockMode lockMode() const; + +private: +#ifdef Q_OS_WIN + Qt::HANDLE wmutex; + Qt::HANDLE rmutex; + QVector rmutexes; + QString mutexname; + + Qt::HANDLE getMutexHandle(int idx, bool doCreate); + bool waitMutex(Qt::HANDLE mutex, bool doBlock); + +#endif + LockMode m_lock_mode; +}; +} +#endif diff --git a/qtsingleapplication/src/qtlockedfile_unix.cpp b/qtsingleapplication/src/qtlockedfile_unix.cpp new file mode 100644 index 00000000..715c7d9b --- /dev/null +++ b/qtsingleapplication/src/qtlockedfile_unix.cpp @@ -0,0 +1,114 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + +#include +#include +#include +#include + +#include "qtlockedfile.h" + +bool QtLockedFile::lock(LockMode mode, bool block) +{ + if (!isOpen()) { + qWarning("QtLockedFile::lock(): file is not opened"); + return false; + } + + if (mode == NoLock) + return unlock(); + + if (mode == m_lock_mode) + return true; + + if (m_lock_mode != NoLock) + unlock(); + + struct flock fl; + fl.l_whence = SEEK_SET; + fl.l_start = 0; + fl.l_len = 0; + fl.l_type = (mode == ReadLock) ? F_RDLCK : F_WRLCK; + int cmd = block ? F_SETLKW : F_SETLK; + int ret = fcntl(handle(), cmd, &fl); + + if (ret == -1) { + if (errno != EINTR && errno != EAGAIN) + qWarning("QtLockedFile::lock(): fcntl: %s", strerror(errno)); + return false; + } + + + m_lock_mode = mode; + return true; +} + + +bool QtLockedFile::unlock() +{ + if (!isOpen()) { + qWarning("QtLockedFile::unlock(): file is not opened"); + return false; + } + + if (!isLocked()) + return true; + + struct flock fl; + fl.l_whence = SEEK_SET; + fl.l_start = 0; + fl.l_len = 0; + fl.l_type = F_UNLCK; + int ret = fcntl(handle(), F_SETLKW, &fl); + + if (ret == -1) { + qWarning("QtLockedFile::lock(): fcntl: %s", strerror(errno)); + return false; + } + + m_lock_mode = NoLock; + return true; +} + +QtLockedFile::~QtLockedFile() +{ + if (isOpen()) + unlock(); +} + diff --git a/qtsingleapplication/src/qtlockedfile_win.cpp b/qtsingleapplication/src/qtlockedfile_win.cpp new file mode 100644 index 00000000..4cd20039 --- /dev/null +++ b/qtsingleapplication/src/qtlockedfile_win.cpp @@ -0,0 +1,206 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + +#include "qtlockedfile.h" +#include +#include + +#define MUTEX_PREFIX "QtLockedFile mutex " +// Maximum number of concurrent read locks. Must not be greater than MAXIMUM_WAIT_OBJECTS +#define MAX_READERS MAXIMUM_WAIT_OBJECTS + +Qt::HANDLE QtLockedFile::getMutexHandle(int idx, bool doCreate) +{ + if (mutexname.isEmpty()) { + QFileInfo fi(*this); + mutexname = QString::fromLatin1(MUTEX_PREFIX) + + fi.absoluteFilePath().toLower(); + } + QString mname(mutexname); + if (idx >= 0) + mname += QString::number(idx); + + Qt::HANDLE mutex; + if (doCreate) { + QT_WA( { mutex = CreateMutexW(NULL, FALSE, (TCHAR*)mname.utf16()); }, + { mutex = CreateMutexA(NULL, FALSE, mname.toLocal8Bit().constData()); } ); + if (!mutex) { + qErrnoWarning("QtLockedFile::lock(): CreateMutex failed"); + return 0; + } + } + else { + QT_WA( { mutex = OpenMutexW(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, (TCHAR*)mname.utf16()); }, + { mutex = OpenMutexA(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, mname.toLocal8Bit().constData()); } ); + if (!mutex) { + if (GetLastError() != ERROR_FILE_NOT_FOUND) + qErrnoWarning("QtLockedFile::lock(): OpenMutex failed"); + return 0; + } + } + return mutex; +} + +bool QtLockedFile::waitMutex(Qt::HANDLE mutex, bool doBlock) +{ + Q_ASSERT(mutex); + DWORD res = WaitForSingleObject(mutex, doBlock ? INFINITE : 0); + switch (res) { + case WAIT_OBJECT_0: + case WAIT_ABANDONED: + return true; + break; + case WAIT_TIMEOUT: + break; + default: + qErrnoWarning("QtLockedFile::lock(): WaitForSingleObject failed"); + } + return false; +} + + + +bool QtLockedFile::lock(LockMode mode, bool block) +{ + if (!isOpen()) { + qWarning("QtLockedFile::lock(): file is not opened"); + return false; + } + + if (mode == NoLock) + return unlock(); + + if (mode == m_lock_mode) + return true; + + if (m_lock_mode != NoLock) + unlock(); + + if (!wmutex && !(wmutex = getMutexHandle(-1, true))) + return false; + + if (!waitMutex(wmutex, block)) + return false; + + if (mode == ReadLock) { + int idx = 0; + for (; idx < MAX_READERS; idx++) { + rmutex = getMutexHandle(idx, false); + if (!rmutex || waitMutex(rmutex, false)) + break; + CloseHandle(rmutex); + } + bool ok = true; + if (idx >= MAX_READERS) { + qWarning("QtLockedFile::lock(): too many readers"); + rmutex = 0; + ok = false; + } + else if (!rmutex) { + rmutex = getMutexHandle(idx, true); + if (!rmutex || !waitMutex(rmutex, false)) + ok = false; + } + if (!ok && rmutex) { + CloseHandle(rmutex); + rmutex = 0; + } + ReleaseMutex(wmutex); + if (!ok) + return false; + } + else { + Q_ASSERT(rmutexes.isEmpty()); + for (int i = 0; i < MAX_READERS; i++) { + Qt::HANDLE mutex = getMutexHandle(i, false); + if (mutex) + rmutexes.append(mutex); + } + if (rmutexes.size()) { + DWORD res = WaitForMultipleObjects(rmutexes.size(), rmutexes.constData(), + TRUE, block ? INFINITE : 0); + if (res != WAIT_OBJECT_0 && res != WAIT_ABANDONED) { + if (res != WAIT_TIMEOUT) + qErrnoWarning("QtLockedFile::lock(): WaitForMultipleObjects failed"); + m_lock_mode = WriteLock; // trick unlock() to clean up - semiyucky + unlock(); + return false; + } + } + } + + m_lock_mode = mode; + return true; +} + +bool QtLockedFile::unlock() +{ + if (!isOpen()) { + qWarning("QtLockedFile::unlock(): file is not opened"); + return false; + } + + if (!isLocked()) + return true; + + if (m_lock_mode == ReadLock) { + ReleaseMutex(rmutex); + CloseHandle(rmutex); + rmutex = 0; + } + else { + foreach(Qt::HANDLE mutex, rmutexes) { + ReleaseMutex(mutex); + CloseHandle(mutex); + } + rmutexes.clear(); + ReleaseMutex(wmutex); + } + + m_lock_mode = QtLockedFile::NoLock; + return true; +} + +QtLockedFile::~QtLockedFile() +{ + if (isOpen()) + unlock(); + if (wmutex) + CloseHandle(wmutex); +} diff --git a/qtsingleapplication/src/qtsingleapplication.cpp b/qtsingleapplication/src/qtsingleapplication.cpp new file mode 100644 index 00000000..5a8f1b03 --- /dev/null +++ b/qtsingleapplication/src/qtsingleapplication.cpp @@ -0,0 +1,344 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + + +#include "qtsingleapplication.h" +#include "qtlocalpeer.h" +#include + + +/*! + \class QtSingleApplication qtsingleapplication.h + \brief The QtSingleApplication class provides an API to detect and + communicate with running instances of an application. + + This class allows you to create applications where only one + instance should be running at a time. I.e., if the user tries to + launch another instance, the already running instance will be + activated instead. Another usecase is a client-server system, + where the first started instance will assume the role of server, + and the later instances will act as clients of that server. + + By default, the full path of the executable file is used to + determine whether two processes are instances of the same + application. You can also provide an explicit identifier string + that will be compared instead. + + The application should create the QtSingleApplication object early + in the startup phase, and call isRunning() to find out if another + instance of this application is already running. If isRunning() + returns false, it means that no other instance is running, and + this instance has assumed the role as the running instance. In + this case, the application should continue with the initialization + of the application user interface before entering the event loop + with exec(), as normal. + + The messageReceived() signal will be emitted when the running + application receives messages from another instance of the same + application. When a message is received it might be helpful to the + user to raise the application so that it becomes visible. To + facilitate this, QtSingleApplication provides the + setActivationWindow() function and the activateWindow() slot. + + If isRunning() returns true, another instance is already + running. It may be alerted to the fact that another instance has + started by using the sendMessage() function. Also data such as + startup parameters (e.g. the name of the file the user wanted this + new instance to open) can be passed to the running instance with + this function. Then, the application should terminate (or enter + client mode). + + If isRunning() returns true, but sendMessage() fails, that is an + indication that the running instance is frozen. + + Here's an example that shows how to convert an existing + application to use QtSingleApplication. It is very simple and does + not make use of all QtSingleApplication's functionality (see the + examples for that). + + \code + // Original + int main(int argc, char **argv) + { + QApplication app(argc, argv); + + MyMainWidget mmw; + mmw.show(); + return app.exec(); + } + + // Single instance + int main(int argc, char **argv) + { + QtSingleApplication app(argc, argv); + + if (app.isRunning()) + return !app.sendMessage(someDataString); + + MyMainWidget mmw; + app.setActivationWindow(&mmw); + mmw.show(); + return app.exec(); + } + \endcode + + Once this QtSingleApplication instance is destroyed (normally when + the process exits or crashes), when the user next attempts to run the + application this instance will not, of course, be encountered. The + next instance to call isRunning() or sendMessage() will assume the + role as the new running instance. + + For console (non-GUI) applications, QtSingleCoreApplication may be + used instead of this class, to avoid the dependency on the QtGui + library. + + \sa QtSingleCoreApplication +*/ + + +void QtSingleApplication::sysInit(const QString &appId) +{ + actWin = 0; + peer = new QtLocalPeer(this, appId); + connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&))); +} + + +/*! + Creates a QtSingleApplication object. The application identifier + will be QCoreApplication::applicationFilePath(). \a argc, \a + argv, and \a GUIenabled are passed on to the QAppliation constructor. + + If you are creating a console application (i.e. setting \a + GUIenabled to false), you may consider using + QtSingleCoreApplication instead. +*/ + +QtSingleApplication::QtSingleApplication(int &argc, char **argv, bool GUIenabled) + : QApplication(argc, argv, GUIenabled) +{ + sysInit(); +} + + +/*! + Creates a QtSingleApplication object with the application + identifier \a appId. \a argc and \a argv are passed on to the + QAppliation constructor. +*/ + +QtSingleApplication::QtSingleApplication(const QString &appId, int &argc, char **argv) + : QApplication(argc, argv) +{ + sysInit(appId); +} + + +/*! + Creates a QtSingleApplication object. The application identifier + will be QCoreApplication::applicationFilePath(). \a argc, \a + argv, and \a type are passed on to the QAppliation constructor. +*/ +QtSingleApplication::QtSingleApplication(int &argc, char **argv, Type type) + : QApplication(argc, argv, type) +{ + sysInit(); +} + + +#if defined(Q_WS_X11) +/*! + Special constructor for X11, ref. the documentation of + QApplication's corresponding constructor. The application identifier + will be QCoreApplication::applicationFilePath(). \a dpy, \a visual, + and \a cmap are passed on to the QApplication constructor. +*/ +QtSingleApplication::QtSingleApplication(Display* dpy, Qt::HANDLE visual, Qt::HANDLE cmap) + : QApplication(dpy, visual, cmap) +{ + sysInit(); +} + +/*! + Special constructor for X11, ref. the documentation of + QApplication's corresponding constructor. The application identifier + will be QCoreApplication::applicationFilePath(). \a dpy, \a argc, \a + argv, \a visual, and \a cmap are passed on to the QApplication + constructor. +*/ +QtSingleApplication::QtSingleApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual, Qt::HANDLE cmap) + : QApplication(dpy, argc, argv, visual, cmap) +{ + sysInit(); +} + +/*! + Special constructor for X11, ref. the documentation of + QApplication's corresponding constructor. The application identifier + will be \a appId. \a dpy, \a argc, \a + argv, \a visual, and \a cmap are passed on to the QApplication + constructor. +*/ +QtSingleApplication::QtSingleApplication(Display* dpy, const QString &appId, int argc, char **argv, Qt::HANDLE visual, Qt::HANDLE cmap) + : QApplication(dpy, argc, argv, visual, cmap) +{ + sysInit(appId); +} +#endif + + +/*! + Returns true if another instance of this application is running; + otherwise false. + + This function does not find instances of this application that are + being run by a different user (on Windows: that are running in + another session). + + \sa sendMessage() +*/ + +bool QtSingleApplication::isRunning() +{ + return peer->isClient(); +} + + +/*! + Tries to send the text \a message to the currently running + instance. The QtSingleApplication object in the running instance + will emit the messageReceived() signal when it receives the + message. + + This function returns true if the message has been sent to, and + processed by, the current instance. If there is no instance + currently running, or if the running instance fails to process the + message within \a timeout milliseconds, this function return false. + + \sa isRunning(), messageReceived() +*/ +bool QtSingleApplication::sendMessage(const QString &message, int timeout) +{ + return peer->sendMessage(message, timeout); +} + + +/*! + Returns the application identifier. Two processes with the same + identifier will be regarded as instances of the same application. +*/ +QString QtSingleApplication::id() const +{ + return peer->applicationId(); +} + + +/*! + Sets the activation window of this application to \a aw. The + activation window is the widget that will be activated by + activateWindow(). This is typically the application's main window. + + If \a activateOnMessage is true (the default), the window will be + activated automatically every time a message is received, just prior + to the messageReceived() signal being emitted. + + \sa activateWindow(), messageReceived() +*/ + +void QtSingleApplication::setActivationWindow(QWidget* aw, bool activateOnMessage) +{ + actWin = aw; + if (activateOnMessage) + connect(peer, SIGNAL(messageReceived(const QString&)), this, SLOT(activateWindow())); + else + disconnect(peer, SIGNAL(messageReceived(const QString&)), this, SLOT(activateWindow())); +} + + +/*! + Returns the applications activation window if one has been set by + calling setActivationWindow(), otherwise returns 0. + + \sa setActivationWindow() +*/ +QWidget* QtSingleApplication::activationWindow() const +{ + return actWin; +} + + +/*! + De-minimizes, raises, and activates this application's activation window. + This function does nothing if no activation window has been set. + + This is a convenience function to show the user that this + application instance has been activated when he has tried to start + another instance. + + This function should typically be called in response to the + messageReceived() signal. By default, that will happen + automatically, if an activation window has been set. + + \sa setActivationWindow(), messageReceived(), initialize() +*/ +void QtSingleApplication::activateWindow() +{ + if (actWin) { + actWin->setWindowState(actWin->windowState() & ~Qt::WindowMinimized); + actWin->raise(); + actWin->activateWindow(); + } +} + + +/*! + \fn void QtSingleApplication::messageReceived(const QString& message) + + This signal is emitted when the current instance receives a \a + message from another instance of this application. + + \sa sendMessage(), setActivationWindow(), activateWindow() +*/ + + +/*! + \fn void QtSingleApplication::initialize(bool dummy = true) + + \obsolete +*/ diff --git a/qtsingleapplication/src/qtsingleapplication.h b/qtsingleapplication/src/qtsingleapplication.h new file mode 100644 index 00000000..7bf6837a --- /dev/null +++ b/qtsingleapplication/src/qtsingleapplication.h @@ -0,0 +1,98 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + + +#include + +class QtLocalPeer; + +#if defined(Q_WS_WIN) +# if !defined(QT_QTSINGLEAPPLICATION_EXPORT) && !defined(QT_QTSINGLEAPPLICATION_IMPORT) +# define QT_QTSINGLEAPPLICATION_EXPORT +# elif defined(QT_QTSINGLEAPPLICATION_IMPORT) +# if defined(QT_QTSINGLEAPPLICATION_EXPORT) +# undef QT_QTSINGLEAPPLICATION_EXPORT +# endif +# define QT_QTSINGLEAPPLICATION_EXPORT __declspec(dllimport) +# elif defined(QT_QTSINGLEAPPLICATION_EXPORT) +# undef QT_QTSINGLEAPPLICATION_EXPORT +# define QT_QTSINGLEAPPLICATION_EXPORT __declspec(dllexport) +# endif +#else +# define QT_QTSINGLEAPPLICATION_EXPORT +#endif + +class QT_QTSINGLEAPPLICATION_EXPORT QtSingleApplication : public QApplication +{ + Q_OBJECT + +public: + QtSingleApplication(int &argc, char **argv, bool GUIenabled = true); + QtSingleApplication(const QString &id, int &argc, char **argv); + QtSingleApplication(int &argc, char **argv, Type type); +#if defined(Q_WS_X11) + QtSingleApplication(Display* dpy, Qt::HANDLE visual = 0, Qt::HANDLE colormap = 0); + QtSingleApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual = 0, Qt::HANDLE cmap= 0); + QtSingleApplication(Display* dpy, const QString &appId, int argc, char **argv, Qt::HANDLE visual = 0, Qt::HANDLE colormap = 0); +#endif + + bool isRunning(); + QString id() const; + + void setActivationWindow(QWidget* aw, bool activateOnMessage = true); + QWidget* activationWindow() const; + + // Obsolete: + void initialize(bool dummy = true) + { isRunning(); Q_UNUSED(dummy) } + +public Q_SLOTS: + bool sendMessage(const QString &message, int timeout = 5000); + void activateWindow(); + + +Q_SIGNALS: + void messageReceived(const QString &message); + + +private: + void sysInit(const QString &appId = QString()); + QtLocalPeer *peer; + QWidget *actWin; +}; diff --git a/qtsingleapplication/src/qtsingleapplication.pri b/qtsingleapplication/src/qtsingleapplication.pri new file mode 100644 index 00000000..5909f049 --- /dev/null +++ b/qtsingleapplication/src/qtsingleapplication.pri @@ -0,0 +1,16 @@ +include(../common.pri) +INCLUDEPATH += $$PWD +DEPENDPATH += $$PWD +QT *= network + +qtsingleapplication-uselib:!qtsingleapplication-buildlib { + LIBS += -L$$QTSINGLEAPPLICATION_LIBDIR -l$$QTSINGLEAPPLICATION_LIBNAME +} else { + SOURCES += $$PWD/qtsingleapplication.cpp $$PWD/qtlocalpeer.cpp + HEADERS += $$PWD/qtsingleapplication.h $$PWD/qtlocalpeer.h +} + +win32 { + contains(TEMPLATE, lib):contains(CONFIG, shared):DEFINES += QT_QTSINGLEAPPLICATION_EXPORT + else:qtsingleapplication-uselib:DEFINES += QT_QTSINGLEAPPLICATION_IMPORT +} diff --git a/qtsingleapplication/src/qtsinglecoreapplication.cpp b/qtsingleapplication/src/qtsinglecoreapplication.cpp new file mode 100644 index 00000000..cf607710 --- /dev/null +++ b/qtsingleapplication/src/qtsinglecoreapplication.cpp @@ -0,0 +1,148 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + + +#include "qtsinglecoreapplication.h" +#include "qtlocalpeer.h" + +/*! + \class QtSingleCoreApplication qtsinglecoreapplication.h + \brief A variant of the QtSingleApplication class for non-GUI applications. + + This class is a variant of QtSingleApplication suited for use in + console (non-GUI) applications. It is an extension of + QCoreApplication (instead of QApplication). It does not require + the QtGui library. + + The API and usage is identical to QtSingleApplication, except that + functions relating to the "activation window" are not present, for + obvious reasons. Please refer to the QtSingleApplication + documentation for explanation of the usage. + + A QtSingleCoreApplication instance can communicate to a + QtSingleApplication instance if they share the same application + id. Hence, this class can be used to create a light-weight + command-line tool that sends commands to a GUI application. + + \sa QtSingleApplication +*/ + +/*! + Creates a QtSingleCoreApplication object. The application identifier + will be QCoreApplication::applicationFilePath(). \a argc and \a + argv are passed on to the QCoreAppliation constructor. +*/ + +QtSingleCoreApplication::QtSingleCoreApplication(int &argc, char **argv) + : QCoreApplication(argc, argv) +{ + peer = new QtLocalPeer(this); + connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&))); +} + + +/*! + Creates a QtSingleCoreApplication object with the application + identifier \a appId. \a argc and \a argv are passed on to the + QCoreAppliation constructor. +*/ +QtSingleCoreApplication::QtSingleCoreApplication(const QString &appId, int &argc, char **argv) + : QCoreApplication(argc, argv) +{ + peer = new QtLocalPeer(this, appId); + connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&))); +} + + +/*! + Returns true if another instance of this application is running; + otherwise false. + + This function does not find instances of this application that are + being run by a different user (on Windows: that are running in + another session). + + \sa sendMessage() +*/ + +bool QtSingleCoreApplication::isRunning() +{ + return peer->isClient(); +} + + +/*! + Tries to send the text \a message to the currently running + instance. The QtSingleCoreApplication object in the running instance + will emit the messageReceived() signal when it receives the + message. + + This function returns true if the message has been sent to, and + processed by, the current instance. If there is no instance + currently running, or if the running instance fails to process the + message within \a timeout milliseconds, this function return false. + + \sa isRunning(), messageReceived() +*/ + +bool QtSingleCoreApplication::sendMessage(const QString &message, int timeout) +{ + return peer->sendMessage(message, timeout); +} + + +/*! + Returns the application identifier. Two processes with the same + identifier will be regarded as instances of the same application. +*/ + +QString QtSingleCoreApplication::id() const +{ + return peer->applicationId(); +} + + +/*! + \fn void QtSingleCoreApplication::messageReceived(const QString& message) + + This signal is emitted when the current instance receives a \a + message from another instance of this application. + + \sa sendMessage() +*/ diff --git a/qtsingleapplication/src/qtsinglecoreapplication.h b/qtsingleapplication/src/qtsinglecoreapplication.h new file mode 100644 index 00000000..ef529a8f --- /dev/null +++ b/qtsingleapplication/src/qtsinglecoreapplication.h @@ -0,0 +1,66 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of a Qt Solutions component. +** +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +****************************************************************************/ + + +#include + +class QtLocalPeer; + +class QtSingleCoreApplication : public QCoreApplication +{ + Q_OBJECT + +public: + QtSingleCoreApplication(int &argc, char **argv); + QtSingleCoreApplication(const QString &id, int &argc, char **argv); + + bool isRunning(); + QString id() const; + +public Q_SLOTS: + bool sendMessage(const QString &message, int timeout = 5000); + + +Q_SIGNALS: + void messageReceived(const QString &message); + + +private: + QtLocalPeer* peer; +}; diff --git a/qtsingleapplication/src/qtsinglecoreapplication.pri b/qtsingleapplication/src/qtsinglecoreapplication.pri new file mode 100644 index 00000000..d2d6cc3e --- /dev/null +++ b/qtsingleapplication/src/qtsinglecoreapplication.pri @@ -0,0 +1,10 @@ +INCLUDEPATH += $$PWD +DEPENDPATH += $$PWD +HEADERS += $$PWD/qtsinglecoreapplication.h $$PWD/qtlocalpeer.h +SOURCES += $$PWD/qtsinglecoreapplication.cpp $$PWD/qtlocalpeer.cpp + +QT *= network + +win32:contains(TEMPLATE, lib):contains(CONFIG, shared) { + DEFINES += QT_QTSINGLECOREAPPLICATION_EXPORT=__declspec(dllexport) +}