From 671427803a1b676141d60692780cadc6f95c6be6 Mon Sep 17 00:00:00 2001
From: xiaoyifang <105986+xiaoyifang@users.noreply.github.com>
Date: Mon, 5 Jun 2023 21:22:20 +0800
Subject: [PATCH] fix: replace suggestion list with QCompleter (#808)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* fix: replace suggestionList with QCompleter


* 🎨 apply clang-format changes


* fix: code smells

---------

Co-authored-by: xiaoyifang <xiaoyifang@users.noreply.github.com>
---
 goldendict.pro         |   2 -
 src/dict/dictionary.hh |  15 ++-
 src/dict/mediawiki.cc  |   7 +-
 src/ui/mainwindow.cc   | 157 +++++++++++++++--------
 src/ui/mainwindow.hh   |  10 +-
 src/ui/mainwindow.ui   |   7 +-
 src/ui/scanpopup.cc    |  62 ++++-----
 src/ui/scanpopup.hh    |   1 -
 src/ui/translatebox.cc | 285 +++++++----------------------------------
 src/ui/translatebox.hh |  47 ++-----
 src/wordfinder.cc      | 195 ++++++++++++----------------
 src/wordfinder.hh      |   5 +-
 src/wordlist.cc        | 109 ----------------
 src/wordlist.hh        |  45 -------
 14 files changed, 286 insertions(+), 661 deletions(-)
 delete mode 100644 src/wordlist.cc
 delete mode 100644 src/wordlist.hh

diff --git a/goldendict.pro b/goldendict.pro
index 4e2580be..814c21aa 100644
--- a/goldendict.pro
+++ b/goldendict.pro
@@ -409,7 +409,6 @@ HEADERS += \
     src/webmultimediadownload.hh \
     src/weburlrequestinterceptor.hh \
     src/wordfinder.hh \
-    src/wordlist.hh \
     src/zipfile.hh \
     thirdparty/tomlplusplus/toml++/toml.h
 
@@ -530,7 +529,6 @@ SOURCES += \
     src/webmultimediadownload.cc \
     src/weburlrequestinterceptor.cc \
     src/wordfinder.cc \
-    src/wordlist.cc \
     src/zipfile.cc \
     thirdparty/fmt/format.cc
 
diff --git a/src/dict/dictionary.hh b/src/dict/dictionary.hh
index c016193f..e1220e02 100644
--- a/src/dict/dictionary.hh
+++ b/src/dict/dictionary.hh
@@ -220,16 +220,21 @@ class WordSearchRequestInstant: public WordSearchRequest
 public:
 
   WordSearchRequestInstant()
-  { finish(); }
+  {
+    finish();
+  }
 
-  virtual void cancel()
-  {}
+  void cancel() override {}
 
   vector< WordMatch > & getMatches()
-  { return matches; }
+  {
+    return matches;
+  }
 
   void setUncertain( bool value )
-  { uncertain = value; }
+  {
+    uncertain = value;
+  }
 };
 
 /// A helper class for synchronous data read implementations.
diff --git a/src/dict/mediawiki.cc b/src/dict/mediawiki.cc
index 6b372a37..c99aa574 100644
--- a/src/dict/mediawiki.cc
+++ b/src/dict/mediawiki.cc
@@ -123,7 +123,7 @@ MediaWikiWordSearchRequest::MediaWikiWordSearchRequest( wstring const & str,
                                                         QNetworkAccessManager & mgr ) :
   isCancelling( false )
 {
-  GD_DPRINTF( "request begin\n" );
+  GD_DPRINTF( "wiki request begin\n" );
   QUrl reqUrl( url + "/api.php?action=query&list=allpages&aplimit=40&format=xml" );
 
   GlobalBroadcaster::instance()->addWhitelist( reqUrl.host() );
@@ -188,8 +188,9 @@ void MediaWikiWordSearchRequest::downloadFinished()
 
         QMutexLocker _( &dataMutex );
 
-        for( int x = 0; x < nl.length(); ++x )
-          matches.push_back( gd::toWString( nl.item( x ).toElement().attribute( "title" ) ) );
+        qDebug() << "matches" << matches.size();
+        for ( int x = 0; x < nl.length(); ++x )
+          matches.emplace_back( gd::toWString( nl.item( x ).toElement().attribute( "title" ) ) );
       }
     }
     GD_DPRINTF( "done.\n" );
diff --git a/src/ui/mainwindow.cc b/src/ui/mainwindow.cc
index 65d20c61..5501a2db 100644
--- a/src/ui/mainwindow.cc
+++ b/src/ui/mainwindow.cc
@@ -35,6 +35,8 @@
 #include <QThreadPool>
 #include <QSslConfiguration>
 #include <QStyleFactory>
+#include "weburlrequestinterceptor.hh"
+#include "folding.hh"
 
 #include <set>
 #include <map>
@@ -46,6 +48,7 @@
 #include "help.hh"
 #include "ui_authentication.h"
 #include "resourceschemehandler.hh"
+#include <QListWidgetItem>
 
 #include "globalregex.hh"
 
@@ -55,8 +58,6 @@
 
 #ifdef Q_OS_WIN32
   #include <windows.h>
-  #include "wstring.hh"
-  #include "wstring_qt.hh"
 #endif
 
 #include <QWebEngineSettings>
@@ -315,22 +316,19 @@ MainWindow::MainWindow( Config::Class & cfg_ ):
   {
     groupList     = groupListInDock;
     translateLine = ui.translateLine;
-    wordList      = ui.wordList;
   }
   else {
     groupList     = groupListInToolbar;
     translateLine = translateBox->translateLine();
-    wordList      = translateBox->wordList();
   }
-  wordList->attachFinder( &wordFinder );
+  connect( &wordFinder, &WordFinder::updated, this, &MainWindow::prefixMatchUpdated );
+  connect( &wordFinder, &WordFinder::finished, this, &MainWindow::prefixMatchFinished );
 
-  // for the old UI:
-  ui.wordList->setTranslateLine( ui.translateLine );
 
   groupList->setFocusPolicy( Qt::ClickFocus );
-  wordList->setFocusPolicy( Qt::ClickFocus );
+  ui.wordList->setFocusPolicy( Qt::ClickFocus );
 
-  wordListDefaultFont      = wordList->font();
+  wordListDefaultFont      = ui.wordList->font();
   translateLineDefaultFont = translateLine->font();
   groupListDefaultFont     = groupList->font();
 
@@ -627,7 +625,7 @@ MainWindow::MainWindow( Config::Class & cfg_ ):
 
   connect( ui.translateLine, &QLineEdit::textChanged, this, &MainWindow::translateInputChanged );
 
-  connect( translateBox->translateLine(), &QLineEdit::textChanged, this, &MainWindow::translateInputChanged );
+  connect( translateBox->translateLine(), &QLineEdit::textEdited, this, &MainWindow::translateInputChanged );
 
   connect( ui.translateLine, &QLineEdit::returnPressed, [ this ]() {
     translateInputFinished( true );
@@ -638,17 +636,8 @@ MainWindow::MainWindow( Config::Class & cfg_ ):
 
   connect( ui.wordList, &QListWidget::itemSelectionChanged, this, &MainWindow::wordListSelectionChanged );
 
-  connect( translateBox->wordList(),
-           SIGNAL( itemDoubleClicked( QListWidgetItem * ) ),
-           this,
-           SLOT( wordListItemActivated( QListWidgetItem * ) ) );
-
   connect( ui.wordList, &QListWidget::itemClicked, this, &MainWindow::wordListItemActivated );
 
-  connect( ui.wordList, &WordList::statusBarMessage, this, &MainWindow::showStatusBarMessage );
-
-  connect( translateBox->wordList(), &WordList::statusBarMessage, this, &MainWindow::showStatusBarMessage );
-
   connect( ui.dictsList, &QListWidget::itemSelectionChanged, this, &MainWindow::dictsListSelectionChanged );
 
   connect( ui.dictsList, &QListWidget::itemDoubleClicked, this, &MainWindow::dictsListItemActivated );
@@ -661,10 +650,8 @@ MainWindow::MainWindow( Config::Class & cfg_ ):
   translateBox->translateLine()->installEventFilter( this );
 
   ui.wordList->installEventFilter( this );
-  translateBox->wordList()->installEventFilter( this );
 
   ui.wordList->viewport()->installEventFilter( this );
-  translateBox->wordList()->viewport()->installEventFilter( this );
 
   ui.dictsList->installEventFilter( this );
   ui.dictsList->viewport()->installEventFilter( this );
@@ -889,6 +876,83 @@ MainWindow::MainWindow( Config::Class & cfg_ ):
   useSmallIconsInToolbarsTriggered();
 }
 
+void MainWindow::prefixMatchUpdated()
+{
+  updateMatchResults( false );
+}
+
+void MainWindow::prefixMatchFinished()
+{
+  updateMatchResults( true );
+}
+
+void MainWindow::updateMatchResults( bool finished )
+{
+  WordFinder::SearchResults const & results = wordFinder.getResults();
+
+  if ( cfg.preferences.searchInDock ) {
+    ui.wordList->setUpdatesEnabled( false );
+    //clear all existed items
+    ui.wordList->clear();
+
+    for ( const auto & result : results ) {
+      auto i = new QListWidgetItem( result.first, ui.wordList );
+      i->setToolTip( result.first );
+
+      if ( result.second ) {
+        QFont f = i->font();
+        f.setItalic( true );
+        i->setFont( f );
+      }
+
+      i->setTextAlignment( Qt::AlignLeft );
+    }
+
+    if ( ui.wordList->count() ) {
+      ui.wordList->scrollToItem( ui.wordList->item( 0 ), QAbstractItemView::PositionAtTop );
+      ui.wordList->setCurrentItem( nullptr, QItemSelectionModel::Clear );
+    }
+
+    ui.wordList->setUpdatesEnabled( true );
+    ui.wordList->unsetCursor();
+  }
+  else {
+
+    QStringList _results;
+    _results.clear();
+
+    for ( const auto & result : results ) {
+      _results << result.first;
+    }
+    translateBox->setModel( _results );
+  }
+
+  if ( finished ) {
+
+    refreshTranslateLine();
+
+    if ( !wordFinder.getErrorString().isEmpty() )
+      emit showStatusBarMessage( tr( "WARNING: %1" ).arg( wordFinder.getErrorString() ),
+                                 20000,
+                                 QPixmap( ":/icons/error.svg" ) );
+  }
+}
+
+void MainWindow::refreshTranslateLine()
+{
+  if ( !translateLine )
+    return;
+
+  // Visually mark the input line to mark if there's no results
+  bool setMark = wordFinder.getResults().empty() && !wordFinder.wasSearchUncertain();
+
+  if ( translateLine->property( "noResults" ).toBool() != setMark ) {
+    translateLine->setProperty( "noResults", setMark );
+
+    Utils::Widget::setNoResultColor( translateLine, setMark );
+  }
+}
+
 void MainWindow::clipboardChange( QClipboard::Mode m )
 {
   if ( !scanPopup ) {
@@ -963,9 +1027,10 @@ void MainWindow::updateSearchPaneAndBar( bool searchInDock )
 
     groupList     = groupListInDock;
     translateLine = ui.translateLine;
-    wordList      = ui.wordList;
 
     translateBoxToolBarAction->setVisible( false );
+
+    translateBox->setPopupEnabled( false );
   }
   else
   {
@@ -988,7 +1053,6 @@ void MainWindow::updateSearchPaneAndBar( bool searchInDock )
 
     groupList     = groupListInToolbar;
     translateLine = translateBox->translateLine();
-    wordList      = translateBox->wordList();
 
     translateBoxToolBarAction->setVisible( true );
   }
@@ -1003,8 +1067,6 @@ void MainWindow::updateSearchPaneAndBar( bool searchInDock )
   // reset the flag when switching UI modes
   wordListSelChanged = false;
 
-  wordList->attachFinder( &wordFinder );
-
   updateGroupList();
   applyWordsZoomLevel();
 
@@ -1014,7 +1076,6 @@ void MainWindow::updateSearchPaneAndBar( bool searchInDock )
 
 void MainWindow::mousePressEvent( QMouseEvent * event )
 {
-
   if ( handleBackForwardMouseButtons( event ) ) {
     return;
   }
@@ -2197,7 +2258,7 @@ void MainWindow::updateCurrentGroupProperty()
 
   if ( grp && translateLine->property( "currentGroup" ).toString() != grp->name ) {
     translateLine->setProperty( "currentGroup", grp->name );
-    wordList->setProperty( "currentGroup", grp->name );
+    ui.wordList->setProperty( "currentGroup", grp->name );
     QString ss = styleSheet();
 
     // Only update stylesheet if it mentions currentGroup, as updating the
@@ -2231,8 +2292,8 @@ void MainWindow::updateSuggestionList( QString const & newValue )
   // If some word is selected in the word list, unselect it. This prevents
   // triggering a set of spurious activation signals when the list changes.
 
-  if ( wordList->selectionModel()->hasSelection() )
-    wordList->setCurrentItem( 0, QItemSelectionModel::Clear );
+  if ( ui.wordList->selectionModel()->hasSelection() )
+    ui.wordList->setCurrentItem( 0, QItemSelectionModel::Clear );
 
   QString req = newValue.trimmed();
 
@@ -2240,8 +2301,8 @@ void MainWindow::updateSuggestionList( QString const & newValue )
   {
     // An empty request always results in an empty result
     wordFinder.cancel();
-    wordList->clear();
-    wordList->unsetCursor();
+    ui.wordList->clear();
+    ui.wordList->unsetCursor();
 
     // Reset the noResults mark if it's on right now
     if ( translateLine->property( "noResults" ).toBool() )
@@ -2253,8 +2314,7 @@ void MainWindow::updateSuggestionList( QString const & newValue )
     return;
   }
 
-  wordList->setCursor( Qt::WaitCursor );
-
+  ui.wordList->setCursor( Qt::WaitCursor );
   wordFinder.prefixMatch( req, getActiveDicts() );
 }
 
@@ -2393,19 +2453,14 @@ bool MainWindow::eventFilter( QObject * obj, QEvent * ev )
   if ( ev->type() == QEvent::MouseButtonPress ) {
     QMouseEvent * event = static_cast< QMouseEvent * >( ev );
 
-    // clicks outside of the word list should hide it.
-    if ( obj != translateBox->wordList() && obj != translateBox->wordList()->viewport() ) {
-      translateBox->setPopupEnabled( false );
-    }
-
     return handleBackForwardMouseButtons( event );
   }
 
   if ( ev->type() == QEvent::KeyPress ) {
-    QKeyEvent * keyevent = static_cast< QKeyEvent * >( ev );
+    auto keyevent = dynamic_cast< QKeyEvent * >( ev );
 
-    bool handleCtrlTab = ( obj == translateLine || obj == wordList || obj == ui.historyList || obj == ui.favoritesTree
-                           || obj == ui.dictsList || obj == groupList );
+    bool handleCtrlTab = ( obj == translateLine || obj == ui.wordList || obj == ui.historyList
+                           || obj == ui.favoritesTree || obj == ui.dictsList || obj == groupList );
 
     if ( keyevent->modifiers() == Qt::ControlModifier && keyevent->key() == Qt::Key_Tab ) {
       if ( cfg.preferences.mruTabOrder ) {
@@ -2436,10 +2491,10 @@ bool MainWindow::eventFilter( QObject * obj, QEvent * ev )
 
       if ( cfg.preferences.searchInDock )
       {
-        if ( keyEvent->matches( QKeySequence::MoveToNextLine ) && wordList->count() )
+        if ( keyEvent->matches( QKeySequence::MoveToNextLine ) && ui.wordList->count() )
         {
-          wordList->setFocus( Qt::ShortcutFocusReason );
-          wordList->setCurrentRow( 0, QItemSelectionModel::ClearAndSelect );
+          ui.wordList->setFocus( Qt::ShortcutFocusReason );
+          ui.wordList->setCurrentRow( 0, QItemSelectionModel::ClearAndSelect );
           return true;
         }
       }
@@ -2451,18 +2506,18 @@ bool MainWindow::eventFilter( QObject * obj, QEvent * ev )
       return false;
     }
   }
-  else if ( obj == wordList ) {
+  else if ( obj == ui.wordList ) {
     if ( ev->type() == QEvent::KeyPress ) {
       QKeyEvent * keyEvent = static_cast< QKeyEvent * >( ev );
 
-      if ( keyEvent->matches( QKeySequence::MoveToPreviousLine ) && !wordList->currentRow() ) {
-        wordList->setCurrentRow( 0, QItemSelectionModel::Clear );
+      if ( keyEvent->matches( QKeySequence::MoveToPreviousLine ) && !ui.wordList->currentRow() ) {
+        ui.wordList->setCurrentRow( 0, QItemSelectionModel::Clear );
         translateLine->setFocus( Qt::ShortcutFocusReason );
         return true;
       }
 
       if ( keyEvent->matches( QKeySequence::InsertParagraphSeparator ) &&
-           wordList->selectedItems().size() )
+           ui.wordList->selectedItems().size() )
       {
         if ( cfg.preferences.searchInDock )
         {
@@ -2508,7 +2563,7 @@ void MainWindow::wordListItemActivated( QListWidgetItem * item )
 
 void MainWindow::wordListSelectionChanged()
 {
-  QList< QListWidgetItem * > selected = wordList->selectedItems();
+  QList< QListWidgetItem * > selected = ui.wordList->selectedItems();
 
   if ( selected.size() )
   {
@@ -3438,8 +3493,8 @@ void MainWindow::applyWordsZoomLevel()
     font.setPointSize( ps );
   }
 
-  if ( wordList->font().pointSize() != ps )
-    wordList->setFont( font );
+  if ( ui.wordList->font().pointSize() != ps )
+    ui.wordList->setFont( font );
 
   font = translateLineDefaultFont;
 
diff --git a/src/ui/mainwindow.hh b/src/ui/mainwindow.hh
index 341d86ff..efa2f741 100644
--- a/src/ui/mainwindow.hh
+++ b/src/ui/mainwindow.hh
@@ -11,7 +11,6 @@
 #include <QNetworkAccessManager>
 #include <QProgressDialog>
 #include "ui_mainwindow.h"
-#include "folding.hh"
 #include "config.hh"
 #include "dict/dictionary.hh"
 #include "article_netmgr.hh"
@@ -26,13 +25,11 @@
 #include "mainstatusbar.hh"
 #include "mruqmenu.hh"
 #include "translatebox.hh"
-#include "wordlist.hh"
 #include "dictheadwords.hh"
 #include "fulltextsearch.hh"
 #include "base_type.hh"
 
 #include "hotkeywrapper.hh"
-#include "weburlrequestinterceptor.hh"
 #include "resourceschemehandler.hh"
 #include "iframeschemehandler.hh"
 #ifdef HAVE_X11
@@ -141,7 +138,7 @@ private:
                                     // in a separate thread
   AudioPlayerFactory audioPlayerFactory;
 
-  WordList * wordList;
+  //current active translateLine;
   QLineEdit * translateLine;
 
   WordFinder wordFinder;
@@ -462,7 +459,10 @@ private slots:
   void clipboardChange( QClipboard::Mode m );
 
   void inspectElement( QWebEnginePage * );
-
+  void prefixMatchUpdated();
+  void prefixMatchFinished();
+  void updateMatchResults( bool finished );
+  void refreshTranslateLine();
 signals:
   /// Retranslate Ctrl(Shift) + Click on dictionary pane to dictionary toolbar
   void clickOnDictPane( QString const & id );
diff --git a/src/ui/mainwindow.ui b/src/ui/mainwindow.ui
index 30c4d3a2..056fbc21 100644
--- a/src/ui/mainwindow.ui
+++ b/src/ui/mainwindow.ui
@@ -192,7 +192,7 @@
       </widget>
      </item>
      <item>
-      <widget class="WordList" name="wordList"/>
+      <widget class="QListWidget" name="wordList"/>
      </item>
     </layout>
    </widget>
@@ -607,11 +607,6 @@
    <header>historypanewidget.hh</header>
    <container>1</container>
   </customwidget>
-  <customwidget>
-   <class>WordList</class>
-   <extends>QListWidget</extends>
-   <header>wordlist.hh</header>
-  </customwidget>
   <customwidget>
    <class>FavoritesPaneWidget</class>
    <extends>QWidget</extends>
diff --git a/src/ui/scanpopup.cc b/src/ui/scanpopup.cc
index 062fb228..7dc84264 100644
--- a/src/ui/scanpopup.cc
+++ b/src/ui/scanpopup.cc
@@ -111,14 +111,12 @@ ScanPopup::ScanPopup( QWidget * parent,
   connect( definition, &ArticleView::sendWordToHistory, this, &ScanPopup::sendWordToHistory );
   connect( definition, &ArticleView::typingEvent, this, &ScanPopup::typingEvent );
 
-  wordListDefaultFont      = ui.translateBox->wordList()->font();
+  wordListDefaultFont      = ui.translateBox->completerWidget()->font();
   translateLineDefaultFont = ui.translateBox->font();
   groupListDefaultFont = ui.groupList->font();
 
   ui.mainLayout->addWidget( definition );
 
-  ui.translateBox->wordList()->attachFinder( &wordFinder );
-  ui.translateBox->wordList()->setFocusPolicy(Qt::ClickFocus);
   ui.translateBox->translateLine()->installEventFilter( this );
   definition->installEventFilter(this);
   this->installEventFilter(this);
@@ -127,15 +125,6 @@ ScanPopup::ScanPopup( QWidget * parent,
 
   connect( ui.translateBox->translateLine(), &QLineEdit::returnPressed, this, &ScanPopup::translateInputFinished );
 
-  connect( ui.translateBox->wordList(), &QListWidget::itemClicked, this, &ScanPopup::wordListItemActivated );
-
-  connect( ui.translateBox->wordList(),
-    SIGNAL( itemDoubleClicked( QListWidgetItem * ) ),
-    this,
-    SLOT( wordListItemActivated( QListWidgetItem * ) ) );
-
-  connect( ui.translateBox->wordList(), &WordList::statusBarMessage, this, &ScanPopup::showStatusBarMessage );
-
   ui.pronounceButton->setDisabled( true );
 
   ui.groupList->fill( groups );
@@ -155,7 +144,7 @@ ScanPopup::ScanPopup( QWidget * parent,
     Config::Group * grp = cfg.getGroup( cfg.lastPopupGroupId );
     if( igrp && grp )
       igrp->checkMutedDictionaries( &grp->popupMutedDictionaries );
-    dictionaryBar.setMutedDictionaries( grp ? &grp->popupMutedDictionaries : 0 );
+    dictionaryBar.setMutedDictionaries( grp ? &grp->popupMutedDictionaries : nullptr );
   }
 
   addToolBar( Qt::RightToolBarArea, &dictionaryBar );
@@ -280,10 +269,9 @@ ScanPopup::ScanPopup( QWidget * parent,
 #ifdef HAVE_X11
   scanFlag = new ScanFlag( this );
 
-  connect( scanFlag, &ScanFlag::requestScanPopup,
-    this, [=]{
+  connect( scanFlag, &ScanFlag::requestScanPopup, this, [ this ] {
     translateWordFromSelection();
-  });
+  } );
 
   // Use delay show to prevent multiple popups while selection in progress
   selectionDelayTimer.setSingleShot( true );
@@ -362,11 +350,11 @@ void ScanPopup::applyWordsZoomLevel()
     font.setPointSize( ps );
   }
 
-  if ( ui.translateBox->wordList()->font().pointSize() != ps )
-    ui.translateBox->wordList()->setFont( font );
+  if ( ui.translateBox->completerWidget()->font().pointSize() != ps )
+    ui.translateBox->completerWidget()->setFont( font );
 
   font = translateLineDefaultFont;
-  ps = font.pointSize();
+  ps   = font.pointSize();
 
   if ( cfg.preferences.wordsZoomLevel != 0 )
   {
@@ -413,12 +401,12 @@ Qt::WindowFlags ScanPopup::unpinnedWindowFlags() const
 
 void ScanPopup::translateWordFromClipboard()
 {
-	return translateWordFromClipboard(QClipboard::Clipboard);
+  return translateWordFromClipboard( QClipboard::Clipboard );
 }
 
 void ScanPopup::translateWordFromSelection()
 {
-	return translateWordFromClipboard(QClipboard::Selection);
+  return translateWordFromClipboard( QClipboard::Selection );
 }
 
 void ScanPopup::editGroupRequested()
@@ -627,7 +615,7 @@ void ScanPopup::currentGroupChanged( int )
         dictionaryBar.setMutedDictionaries( &grp->popupMutedDictionaries );
       }
       else
-        dictionaryBar.setMutedDictionaries( 0 );
+        dictionaryBar.setMutedDictionaries( nullptr );
     }
 
   updateDictionaryBar();
@@ -641,11 +629,6 @@ void ScanPopup::currentGroupChanged( int )
   cfg.lastPopupGroupId = ui.groupList->getCurrentGroup();
 }
 
-void ScanPopup::wordListItemActivated( QListWidgetItem * item )
-{
-  showTranslationFor( item->text() );
-}
-
 void ScanPopup::translateInputChanged( QString const & text )
 {
   updateSuggestionList( text );
@@ -659,7 +642,6 @@ void ScanPopup::updateSuggestionList()
 void ScanPopup::updateSuggestionList( QString const & text )
 {
   mainStatusBar->clearMessage();
-  ui.translateBox->wordList()->setCurrentItem( 0, QItemSelectionModel::Clear );
 
   QString req = text.trimmed();
 
@@ -667,8 +649,6 @@ void ScanPopup::updateSuggestionList( QString const & text )
   {
     // An empty request always results in an empty result
     wordFinder.cancel();
-    ui.translateBox->wordList()->clear();
-    ui.translateBox->wordList()->unsetCursor();
 
     // Reset the noResults mark if it's on right now
     if ( ui.translateBox->translateLine()->property( "noResults" ).toBool() )
@@ -681,8 +661,6 @@ void ScanPopup::updateSuggestionList( QString const & text )
     return;
   }
 
-  ui.translateBox->wordList()->setCursor( Qt::WaitCursor );
-
   wordFinder.prefixMatch( req, getActiveDicts() );
 }
 
@@ -959,9 +937,20 @@ void ScanPopup::prefixMatchFinished()
     {
       ui.queryError->setToolTip( wordFinder.getErrorString() );
       ui.queryError->show();
+      showStatusBarMessage( tr( "WARNING: %1" ).arg( wordFinder.getErrorString() ),
+                            20000,
+                            QPixmap( ":/icons/error.svg" ) );
     }
-    else
+    else {
       ui.queryError->hide();
+      auto results = wordFinder.getResults();
+      QStringList _results;
+      for ( auto const & [ fst, snd ] : results ) {
+        _results << fst;
+      }
+
+      ui.translateBox->setModel( _results );
+    }
   }
 }
 
@@ -1121,10 +1110,9 @@ void ScanPopup::updateDictionaryBar()
 
   if( currentId == Instances::Group::AllGroupId )
     dictionaryBar.setMutedDictionaries( &cfg.popupMutedDictionaries );
-  else
-  {
-    Config::Group * grp = cfg.getGroup( currentId );
-    dictionaryBar.setMutedDictionaries( grp ? &grp->popupMutedDictionaries : 0 );
+  else {
+    Config::Group * group = cfg.getGroup( currentId );
+    dictionaryBar.setMutedDictionaries( group ? &group->popupMutedDictionaries : nullptr );
   }
 
   setDictionaryIconSize();
diff --git a/src/ui/scanpopup.hh b/src/ui/scanpopup.hh
index c4e56890..0bfa2515 100644
--- a/src/ui/scanpopup.hh
+++ b/src/ui/scanpopup.hh
@@ -222,7 +222,6 @@ private slots:
 
   void translateInputChanged(QString const & text);
   void translateInputFinished();
-  void wordListItemActivated( QListWidgetItem * );
 
   void focusTranslateLine();
 
diff --git a/src/ui/translatebox.cc b/src/ui/translatebox.cc
index 903b0a07..18a66843 100644
--- a/src/ui/translatebox.cc
+++ b/src/ui/translatebox.cc
@@ -11,209 +11,50 @@
 #include <QModelIndex>
 #include <QScrollBar>
 #include <QStyle>
-
-namespace
-{
-#define MAX_POPUP_ROWS 17
-}
-
-CompletionList::CompletionList(TranslateBox * parent) : WordList(parent),
-  translateBox(parent)
-{
-#ifdef Q_OS_WIN
-  setWindowFlags(Qt::ToolTip);
-#else
-  setParent( parent->window() );
-  setAutoFillBackground( true );
-#endif
-
-  connect( this, &QAbstractItemView::activated, this, &CompletionList::acceptCurrentEntry );
-
-  connect( this, &QListWidget::itemClicked, this, &CompletionList::acceptCurrentEntry );
-
-  translateBox->window()->installEventFilter(this);
-}
-
-bool CompletionList::eventFilter( QObject * obj, QEvent * ev )
-{
-  // when the main window is moved or resized, hide the word list suggestions
-  if ( obj != this && !isAncestorOf( qobject_cast< QWidget * >( obj ) )
-       && ( ev->type() == QEvent::Move || ev->type() == QEvent::Resize ) )
-  {
-    translateBox->setPopupEnabled( false );
-    return false;
-  }
-
-  return QWidget::eventFilter( obj, ev );
-}
-
-int CompletionList::preferredHeight() const
-{
-#if( QT_VERSION < QT_VERSION_CHECK( 6, 0, 0 ) )
-  const QSize itemSizeHint = itemDelegate()->sizeHint( viewOptions(), model()->index( 0, 0 ) );
-#else
-  QStyleOptionViewItem option;
-  initViewItemOption( &option );
-  const QSize itemSizeHint = itemDelegate()->sizeHint(option, model()->index( 0, 0 ) );
-#endif
-  int rows = qMin( count(), MAX_POPUP_ROWS );
-
-  int scrollBarHeight = 0;
-
-  bool hBarIsVisible = horizontalScrollBar()->maximum() > 0;
-
-  if ( hBarIsVisible )
-    scrollBarHeight += QApplication::style()->pixelMetric( QStyle::PM_ScrollBarExtent );
-
-  return rows == 0 ? 0 : itemSizeHint.height() * rows + frameWidth() * 2 + scrollBarHeight;
-}
-
-bool CompletionList::acceptCurrentEntry()
-{
-  if (!isVisible())
-  {
-    return false;
-  }
-
-  const QModelIndex index = currentIndex();
-  if ( !index.isValid() )
-  {
-    return false;
-  }
-
-  emit doubleClicked(index);
-  translateBox->setPopupEnabled( false );
-
-  return true;
-}
+#include <QStringListModel>
 
 TranslateBox::TranslateBox( QWidget * parent ):
-    QWidget( parent ),
-    word_list( new CompletionList( this ) ),
-    translate_line( new QLineEdit( this ) ),
-    m_popupEnabled( false )
+  QWidget( parent ),
+  translate_line( new QLineEdit( this ) ),
+  m_popupEnabled( false )
 {
-  // initially hidden
-  word_list->hide();
+  completer = new QCompleter( words, this );
+  resize( 200, 90 );
+  QSizePolicy sizePolicy( QSizePolicy::Fixed, QSizePolicy::Preferred );
+  sizePolicy.setHorizontalStretch( 0 );
+  sizePolicy.setVerticalStretch( 0 );
+  setSizePolicy( sizePolicy );
 
-  resize(200, 90);
-  QSizePolicy sizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred);
-  sizePolicy.setHorizontalStretch(0);
-  sizePolicy.setVerticalStretch(0);
-  setSizePolicy(sizePolicy);
-  // setMinimumSize(QSize(800, 0));
-
-  setFocusProxy(translate_line);
-  translate_line->setObjectName("translateLine");
+  setFocusProxy( translate_line );
+  translate_line->setObjectName( "translateLine" );
   translate_line->setPlaceholderText( tr( "Type a word or phrase to search dictionaries" ) );
-  word_list->setTranslateLine(translate_line);
 
-  // completer = new QCompleter(m_completionList->model(), this);
-  // completer->setCaseSensitivity(Qt::CaseInsensitive);
-  // completer->setCompletionMode(QCompleter::InlineCompletion);
+  auto layout = new QHBoxLayout( this );
+  setLayout( layout );
+  layout->setContentsMargins( 0, 0, 0, 0 );
+  layout->addWidget( translate_line );
 
-  QHBoxLayout *layout = new QHBoxLayout(this);
-  setLayout(layout);
-  layout->setContentsMargins(0,0,0,0);
-  layout->addWidget(translate_line);
+  auto dropdown = new QAction( QIcon( ":/icons/1downarrow.svg" ), tr( "Drop-down" ), this );
+  connect( dropdown, &QAction::triggered, this, &TranslateBox::rightButtonClicked );
 
-  QAction * dropdown = new QAction( QIcon(":/icons/1downarrow.svg"), tr("Drop-down"),this);
-  connect( dropdown,&QAction::triggered,this, &TranslateBox::rightButtonClicked );
+  translate_line->addAction( dropdown, QLineEdit::TrailingPosition );
+  translate_line->addAction( new QAction( QIcon( ":/icons/system-search.svg" ), "", this ),
+                             QLineEdit::LeadingPosition );
 
-  translate_line->addAction( dropdown,QLineEdit::TrailingPosition);
-  translate_line->addAction( new QAction(QIcon(":/icons/system-search.svg"),"",this),QLineEdit::LeadingPosition);
-
-  translate_line->setFocusPolicy(Qt::ClickFocus);
+  translate_line->setFocusPolicy( Qt::ClickFocus );
 
   translate_line->installEventFilter( this );
-  this->installEventFilter( this );
 
-  connect( translate_line, &QLineEdit::textChanged, this, &TranslateBox::onTextEdit );
+  translate_line->setCompleter( completer );
+  completer->setCompletionMode( QCompleter::UnfilteredPopupCompletion );
+  completer->setMaxVisibleItems( 16 );
 
-
-  connect( word_list, &WordList::contentChanged, this, &TranslateBox::showPopup );
+  connect( completer, QOverload< const QString & >::of( &QCompleter::activated ), this, [ = ]( const QString & text ) {
+    emit translate_line->returnPressed();
+  } );
 }
 
-bool TranslateBox::eventFilter(QObject *obj, QEvent *event)
-{
-    // hide the suggestions list when the window is not active
-    if ( event->type() == QEvent::WindowDeactivate )
-    {
-      if (!word_list->isActiveWindow())
-      {
-        setPopupEnabled( false );
-      }
-      return false;
-    }
-
-    if (obj == translate_line && event->type() == QEvent::KeyPress) {
-        QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
-        switch (keyEvent->key()) {
-        case Qt::Key_Up:
-        case Qt::Key_Down:
-        case Qt::Key_PageUp:
-        case Qt::Key_PageDown:
-          if ( !word_list->isVisible() )
-          {
-            setPopupEnabled( true );
-          }
-          else
-          {
-            QApplication::sendEvent(word_list, event);
-          }
-          return true;
-        case Qt::Key_Enter:
-        case Qt::Key_Return:
-          return word_list->acceptCurrentEntry();
-        case Qt::Key_Escape:
-          setPopupEnabled( false );
-          return true;
-        case Qt::Key_Tab:
-          if ( !word_list->isVisible() )
-          {
-            setPopupEnabled( true );
-          }
-          else
-          {
-            QKeyEvent event( QEvent::KeyPress, Qt::Key_Down, Qt::NoModifier );
-            QApplication::sendEvent( word_list, &event );
-          }
-          return true;
-        case Qt::Key_Backtab:
-          if ( !word_list->isVisible() )
-          {
-            setPopupEnabled( true );
-          }
-          else
-          {
-            QKeyEvent event( QEvent::KeyPress, Qt::Key_Up, Qt::NoModifier );
-            QApplication::sendEvent( word_list, &event );
-          }
-          return true;
-        default:
-            break;
-        }
-    } else if (obj == translate_line && event->type() == QEvent::FocusOut) {
-#if defined(Q_OS_WIN)
-        QFocusEvent *fev = static_cast<QFocusEvent*>(event);
-        if (fev->reason() != Qt::ActiveWindowFocusReason ||
-            (fev->reason() == Qt::ActiveWindowFocusReason && !word_list->isActiveWindow()))
-#endif
-          setPopupEnabled( false );
-    } else if (obj == translate_line && event->type() == QEvent::FocusIn) {
-      // By default, focusing the traslate line does not show
-      // the popup window.
-    } else if (obj == this && event->type() == QEvent::ShortcutOverride) {
-        QKeyEvent *ke = static_cast<QKeyEvent *>(event);
-        if (ke->key() == Qt::Key_Escape && !ke->modifiers() && word_list->isVisible() ) {
-            event->accept();
-            return true;
-        }
-    }
-    return QWidget::eventFilter(obj, event);
-}
-
-void TranslateBox::setText( QString text, bool showPopup )
+void TranslateBox::setText( const QString & text, bool showPopup )
 {
   setPopupEnabled( showPopup );
   translate_line->setText( text );
@@ -232,56 +73,22 @@ void TranslateBox::setSizePolicy( QSizePolicy policy )
     translate_line->setSizePolicy( policy );
 }
 
+void TranslateBox::setModel( QStringList & _words )
+{
+  auto model = (QStringListModel *)( completer->model() );
+
+  model->setStringList( _words );
+}
+
 void TranslateBox::showPopup()
 {
-  // completer->setCompletionPrefix( m_fileLineEdit->text() );
-  // qDebug() << "COMPLETION:" << completer->currentCompletion();
-
-  // Don't allow recursive call
-  if( translateBoxMutex.tryLock() )
-    translateBoxMutex.unlock();
-  else
-    return;
-  QMutexLocker _( &translateBoxMutex );
-
-  if (translate_line->text().trimmed().isEmpty() || word_list->count() == 0)
-  {
-    // nothing to show
-    if (word_list->isVisible())
-    {
-      word_list->hide();
-      translate_line->setFocus();
-    }
-    return;
+  if ( m_popupEnabled ) {
+    completer->popup()->show();
+    completer->complete();
   }
-
-  if ( !m_popupEnabled )
-  {
-    word_list->hide();
-    return;
+  else {
+    completer->popup()->hide();
   }
-
-  int preferredHeight = word_list->preferredHeight();
-
-  QPoint origin( translate_line->x(), translate_line->y() + translate_line->height() );
-
-  if ( word_list->isWindow() )
-  {
-    origin = mapToGlobal( origin );
-  }
-  else
-  {
-    origin = mapTo( window(), origin );
-    preferredHeight = qMin( translate_line->window()->height() - origin.y(), preferredHeight );
-  }
-
-  const QSize size(width(), preferredHeight);
-  const QRect rect( origin, size );
-
-  word_list->setGeometry(rect);
-  word_list->show();
-  word_list->raise();
-  translate_line->setFocus();
 }
 
 QLineEdit * TranslateBox::translateLine()
@@ -289,18 +96,16 @@ QLineEdit * TranslateBox::translateLine()
   return translate_line;
 }
 
-WordList * TranslateBox::wordList()
+QWidget * TranslateBox::completerWidget()
 {
-  return word_list;
+  return completer->widget();
 }
 
 void TranslateBox::rightButtonClicked()
 {
   setPopupEnabled( !m_popupEnabled );
 }
-
-void TranslateBox::onTextEdit()
+void TranslateBox::setSizePolicy( QSizePolicy::Policy hor, QSizePolicy::Policy ver )
 {
-  if ( translate_line->hasFocus() )
-    setPopupEnabled( true );
+  setSizePolicy( QSizePolicy( hor, ver ) );
 }
diff --git a/src/ui/translatebox.hh b/src/ui/translatebox.hh
index 41e72168..c0205589 100644
--- a/src/ui/translatebox.hh
+++ b/src/ui/translatebox.hh
@@ -4,51 +4,25 @@
 #ifndef TRANSLATEBOX_HH
 #define TRANSLATEBOX_HH
 
-#include "wordlist.hh"
-
-
 #include <QLineEdit>
 #include <QWidget>
 #include <QListWidget>
 #include <QFocusEvent>
-
-class TranslateBox;
-
-class CompletionList : public WordList
-{
-  Q_OBJECT
-
-public:
-  CompletionList(TranslateBox * parent);
-  int preferredHeight() const;
-  virtual void setTranslateLine(QLineEdit * line)
-  {
-    WordList::setTranslateLine( line );
-    setFocusProxy( line );
-  }
-
-public slots:
-  bool acceptCurrentEntry();
-
-private:
-  virtual bool eventFilter( QObject *, QEvent * );
-  TranslateBox * translateBox;
-};
+#include <QCompleter>
 
 class TranslateBox : public QWidget
 {
   Q_OBJECT
 
 public:
-  explicit TranslateBox(QWidget * parent = 0);
+  explicit TranslateBox( QWidget * parent = nullptr );
   QLineEdit * translateLine();
-  WordList * wordList();
-  void setText(QString text, bool showPopup=true);
-  void setSizePolicy(QSizePolicy policy);
-  inline void setSizePolicy(QSizePolicy::Policy hor, QSizePolicy::Policy ver)
-  { setSizePolicy(QSizePolicy(hor, ver)); }
+  QWidget * completerWidget();
+  void setText( const QString & text, bool showPopup = true );
+  void setSizePolicy( QSizePolicy policy );
+  void setSizePolicy( QSizePolicy::Policy hor, QSizePolicy::Policy ver );
 
-signals:
+  void setModel( QStringList & _words );
 
 public slots:
   void setPopupEnabled(bool enable);
@@ -56,15 +30,12 @@ public slots:
 private slots:
   void showPopup();
   void rightButtonClicked();
-  void onTextEdit();
 
 private:
-  bool eventFilter(QObject *obj, QEvent *event);
-  CompletionList * word_list;
   QLineEdit * translate_line;
   bool m_popupEnabled;
-  QMutex translateBoxMutex;
-  // QCompleter * completer; // disabled for now
+  QCompleter * completer;
+  QStringList words;
 };
 
 #endif // TRANSLATEBOX_HH
diff --git a/src/wordfinder.cc b/src/wordfinder.cc
index 2c840f48..ed98d15e 100644
--- a/src/wordfinder.cc
+++ b/src/wordfinder.cc
@@ -131,28 +131,23 @@ void WordFinder::startSearch()
   
   allWordWritings[ 0 ] = gd::toWString( inputWord );
 
-  for( size_t x = 0; x < inputDicts->size(); ++x )
-  {
-    vector< wstring > writings = (*inputDicts)[ x ]->getAlternateWritings( allWordWritings[ 0 ] );
+  for ( const auto & inputDict : *inputDicts ) {
+    vector< wstring > writings = inputDict->getAlternateWritings( allWordWritings[ 0 ] );
 
     allWordWritings.insert( allWordWritings.end(), writings.begin(), writings.end() );
   }
 
   // Query each dictionary for all word writings
 
-  for( size_t x = 0; x < inputDicts->size(); ++x )
-  {
-    if ( ( (*inputDicts)[ x ]->getFeatures() & requestedFeatures ) != requestedFeatures )
+  for ( const auto & inputDict : *inputDicts ) {
+    if ( ( inputDict->getFeatures() & requestedFeatures ) != requestedFeatures )
       continue;
 
-    for( size_t y = 0; y < allWordWritings.size(); ++y )
-    {
-      try
-      {
-        sptr< Dictionary::WordSearchRequest > sr =
-          ( searchType == PrefixMatch || searchType == ExpressionMatch ) ?
-            (*inputDicts)[ x ]->prefixMatch( allWordWritings[ y ], requestedMaxResults ) :
-            (*inputDicts)[ x ]->stemmedMatch( allWordWritings[ y ], stemmedMinLength, stemmedMaxSuffixVariation, requestedMaxResults );
+    for ( const auto & allWordWriting : allWordWritings ) {
+      try {
+        sptr< Dictionary::WordSearchRequest > sr = ( searchType == PrefixMatch || searchType == ExpressionMatch ) ?
+          inputDict->prefixMatch( allWordWriting, requestedMaxResults ) :
+          inputDict->stemmedMatch( allWordWriting, stemmedMinLength, stemmedMaxSuffixVariation, requestedMaxResults );
 
         connect( sr.get(), &Dictionary::Request::finished, this, &WordFinder::requestFinished, Qt::QueuedConnection );
 
@@ -161,7 +156,9 @@ void WordFinder::startSearch()
       catch( std::exception & e )
       {
         gdWarning( "Word \"%s\" search error (%s) in \"%s\"\n",
-                   inputWord.toUtf8().data(), e.what(), (*inputDicts)[ x ]->getName().c_str() );
+                   inputWord.toUtf8().data(),
+                   e.what(),
+                   inputDict->getName().c_str() );
       }
     }
   }
@@ -191,15 +188,12 @@ void WordFinder::requestFinished()
   bool newResults = false;
 
   // See how many new requests have finished, and if we have any new results
-  for( list< sptr< Dictionary::WordSearchRequest > >::iterator i =
-         queuedRequests.begin(); i != queuedRequests.end(); )
-  {
-    if ( (*i)->isFinished() )
-    {
-      if ( searchInProgress && !(*i)->getErrorString().isEmpty() )
+  for ( auto i = queuedRequests.begin(); i != queuedRequests.end(); ) {
+    if ( ( *i )->isFinished() ) {
+      if ( searchInProgress && !( *i )->getErrorString().isEmpty() )
         searchErrorString = tr( "Failed to query some dictionaries." );
 
-      if ( (*i)->isUncertain() )
+      if ( ( *i )->isUncertain() )
         searchResultsUncertain = true;
 
       if ( (*i)->matchesCount() )
@@ -233,8 +227,7 @@ void WordFinder::requestFinished()
     return;
   }
 
-  if ( newResults && queuedRequests.size() && !updateResultsTimer.isActive() )
-  {
+  if ( newResults && !queuedRequests.empty() && !updateResultsTimer.isActive() ) {
     // If we have got some new results, but not all of them, we would start a
     // timer to update a user some time in the future
     updateResultsTimer.start();
@@ -297,17 +290,13 @@ void WordFinder::updateResults()
 
   wstring original = Folding::applySimpleCaseOnly( allWordWritings[ 0 ] );
 
-  for( list< sptr< Dictionary::WordSearchRequest > >::iterator i =
-         finishedRequests.begin(); i != finishedRequests.end(); )
-  {
-    for( size_t count = (*i)->matchesCount(), x = 0; x < count; ++x )
-    {
-      wstring match = (**i)[ x ].word;
-      int weight = (**i)[ x ].weight;
+  for ( auto i = finishedRequests.begin(); i != finishedRequests.end(); ) {
+    for ( size_t count = ( *i )->matchesCount(), x = 0; x < count; ++x ) {
+      wstring match      = ( **i )[ x ].word;
+      int weight         = ( **i )[ x ].weight;
       wstring lowerCased = Folding::applySimpleCaseOnly( match );
 
-      if( searchType == ExpressionMatch )
-      {
+      if ( searchType == ExpressionMatch ) {
         unsigned ws;
 
         for( ws = 0; ws < allWordWritings.size(); ws++ )
@@ -330,9 +319,8 @@ void WordFinder::updateResults()
         }
         weight = ws;
       }
-      pair< ResultsIndex::iterator, bool > insertResult =
-        resultsIndex.insert( pair< wstring, ResultsArray::iterator >( lowerCased,
-                                                                      resultsArray.end() ) );
+      auto insertResult =
+        resultsIndex.insert( pair< wstring, ResultsArray::iterator >( lowerCased, resultsArray.end() ) );
 
       if ( !insertResult.second )
       {
@@ -347,7 +335,7 @@ void WordFinder::updateResults()
       }
       else
       {
-        resultsArray.push_back( OneResult() );
+        resultsArray.emplace_back();
 
         resultsArray.back().word = match;
         resultsArray.back().rank = INT_MAX;
@@ -361,14 +349,11 @@ void WordFinder::updateResults()
 
   size_t maxSearchResults = 500;
 
-  if ( resultsArray.size() )
-  {
-    if ( searchType == PrefixMatch )
-    {
+  if ( !resultsArray.empty() ) {
+    if ( searchType == PrefixMatch ) {
       /// Assign each result a category, storing it in the rank's field
-  
-      enum Category
-      {
+
+      enum Category {
         ExactMatch,
         ExactNoFullCaseMatch,
         ExactNoDiaMatch,
@@ -385,66 +370,55 @@ void WordFinder::updateResults()
         Multiplier = 256 // Categories should be multiplied by Multiplier
       };
 
-      for( unsigned wr = 0; wr < allWordWritings.size(); ++wr )
-      {
-        wstring target = Folding::applySimpleCaseOnly( allWordWritings[ wr ] );
+      for ( const auto & allWordWriting : allWordWritings ) {
+        wstring target           = Folding::applySimpleCaseOnly( allWordWriting );
         wstring targetNoFullCase = Folding::applyFullCaseOnly( target );
-        wstring targetNoDia = Folding::applyDiacriticsOnly( targetNoFullCase );
-        wstring targetNoPunct = Folding::applyPunctOnly( targetNoDia );
-        wstring targetNoWs = Folding::applyWhitespaceOnly( targetNoPunct );
-    
+        wstring targetNoDia      = Folding::applyDiacriticsOnly( targetNoFullCase );
+        wstring targetNoPunct    = Folding::applyPunctOnly( targetNoDia );
+        wstring targetNoWs       = Folding::applyWhitespaceOnly( targetNoPunct );
+
         wstring::size_type matchPos = 0;
-    
-        for( ResultsIndex::const_iterator i = resultsIndex.begin(), j = resultsIndex.end();
-             i != j; ++i )
-        {
+
+        for ( const auto & i : resultsIndex ) {
           wstring resultNoFullCase, resultNoDia, resultNoPunct, resultNoWs;
 
           int rank;
-          
-          if ( i->first == target )
+
+          if ( i.first == target )
             rank = ExactMatch * Multiplier;
-          else
-          if ( ( resultNoFullCase = Folding::applyFullCaseOnly( i->first ) ) == targetNoFullCase )
+          else if ( ( resultNoFullCase = Folding::applyFullCaseOnly( i.first ) ) == targetNoFullCase )
             rank = ExactNoFullCaseMatch * Multiplier;
-          else
-          if ( ( resultNoDia = Folding::applyDiacriticsOnly( resultNoFullCase ) ) == targetNoDia )
+          else if ( ( resultNoDia = Folding::applyDiacriticsOnly( resultNoFullCase ) ) == targetNoDia )
             rank = ExactNoDiaMatch * Multiplier;
-          else
-          if ( ( resultNoPunct = Folding::applyPunctOnly( resultNoDia ) ) == targetNoPunct )
+          else if ( ( resultNoPunct = Folding::applyPunctOnly( resultNoDia ) ) == targetNoPunct )
             rank = ExactNoPunctMatch * Multiplier;
-          else
-          if ( ( resultNoWs = Folding::applyWhitespaceOnly( resultNoPunct ) ) == targetNoWs )
+          else if ( ( resultNoWs = Folding::applyWhitespaceOnly( resultNoPunct ) ) == targetNoWs )
             rank = ExactNoWsMatch * Multiplier;
-          else
-          if ( hasSurroundedWithWs( i->first, target, matchPos ) )
+          else if ( hasSurroundedWithWs( i.first, target, matchPos ) )
             rank = ExactInsideMatch * Multiplier + matchPos;
-          else
-          if ( hasSurroundedWithWs( resultNoDia, targetNoDia, matchPos ) )
+          else if ( hasSurroundedWithWs( resultNoDia, targetNoDia, matchPos ) )
             rank = ExactNoDiaInsideMatch * Multiplier + matchPos;
-          else
-          if ( hasSurroundedWithWs( resultNoPunct, targetNoPunct, matchPos ) )
+          else if ( hasSurroundedWithWs( resultNoPunct, targetNoPunct, matchPos ) )
             rank = ExactNoPunctInsideMatch * Multiplier + matchPos;
-          else
-          if ( i->first.size() > target.size() && i->first.compare( 0, target.size(), target ) == 0 )
-            rank = PrefixMatch * Multiplier + saturated( i->first.size() );
-          else
-          if ( resultNoDia.size() > targetNoDia.size() && resultNoDia.compare( 0, targetNoDia.size(), targetNoDia ) == 0 )
-            rank = PrefixNoDiaMatch * Multiplier + saturated( i->first.size() );
-          else
-          if ( resultNoPunct.size() > targetNoPunct.size() && resultNoPunct.compare( 0, targetNoPunct.size(), targetNoPunct ) == 0 )
-            rank = PrefixNoPunctMatch * Multiplier + saturated( i->first.size() );
-          else
-          if ( resultNoWs.size() > targetNoWs.size() && resultNoWs.compare( 0, targetNoWs.size(), targetNoWs ) == 0 )
-            rank = PrefixNoWsMatch * Multiplier + saturated( i->first.size() );
+          else if ( i.first.size() > target.size() && i.first.compare( 0, target.size(), target ) == 0 )
+            rank = PrefixMatch * Multiplier + saturated( i.first.size() );
+          else if ( resultNoDia.size() > targetNoDia.size()
+                    && resultNoDia.compare( 0, targetNoDia.size(), targetNoDia ) == 0 )
+            rank = PrefixNoDiaMatch * Multiplier + saturated( i.first.size() );
+          else if ( resultNoPunct.size() > targetNoPunct.size()
+                    && resultNoPunct.compare( 0, targetNoPunct.size(), targetNoPunct ) == 0 )
+            rank = PrefixNoPunctMatch * Multiplier + saturated( i.first.size() );
+          else if ( resultNoWs.size() > targetNoWs.size()
+                    && resultNoWs.compare( 0, targetNoWs.size(), targetNoWs ) == 0 )
+            rank = PrefixNoWsMatch * Multiplier + saturated( i.first.size() );
           else
             rank = WorstMatch * Multiplier;
 
-          if ( i->second->rank > rank )
-            i->second->rank = rank; // We store the best rank of any writing
+          if ( i.second->rank > rank )
+            i.second->rank = rank; // We store the best rank of any writing
         }
       }
-  
+
       resultsArray.sort( SortByRank() );
     }
     else
@@ -456,29 +430,26 @@ void WordFinder::updateResults()
       // in their beginnings, and second, the length of the strings. Here we assign
       // only the first one, storing it in rank. Then we sort the results using
       // SortByRankAndLength.
-      for( unsigned wr = 0; wr < allWordWritings.size(); ++wr )
-      {
-        wstring target = Folding::apply( allWordWritings[ wr ] );
-  
-        for( ResultsIndex::const_iterator i = resultsIndex.begin(), j = resultsIndex.end();
-             i != j; ++i )
-        {
-          wstring resultFolded = Folding::apply( i->first );
-  
+      for ( const auto & allWordWriting : allWordWritings ) {
+        wstring target = Folding::apply( allWordWriting );
+
+        for ( const auto & i : resultsIndex ) {
+          wstring resultFolded = Folding::apply( i.first );
+
           int charsInCommon = 0;
-  
-          for( wchar const * t = target.c_str(), * r = resultFolded.c_str();
-               *t && *t == *r; ++t, ++r, ++charsInCommon ) ;
-  
+
+          for ( wchar const *t = target.c_str(), *r = resultFolded.c_str(); *t && *t == *r; ++t, ++r, ++charsInCommon )
+            ;
+
           int rank = -charsInCommon; // Negated so the lesser-than
                                      // comparison would yield right
                                      // results.
 
-          if ( i->second->rank > rank )
-            i->second->rank = rank; // We store the best rank of any writing
+          if ( i.second->rank > rank )
+            i.second->rank = rank; // We store the best rank of any writing
         }
       }
-      
+
       resultsArray.sort( SortByRankAndLength() );
 
       maxSearchResults = 15;
@@ -488,24 +459,18 @@ void WordFinder::updateResults()
   searchResults.clear();
   searchResults.reserve( resultsArray.size() < maxSearchResults ? resultsArray.size() : maxSearchResults );
 
-  for( ResultsArray::const_iterator i = resultsArray.begin(), j = resultsArray.end();
-       i != j; ++i )
-  {
-    //GD_DPRINTF( "%d: %ls\n", i->second, i->first.c_str() );
-
+  for ( const auto & i : resultsArray ) {
     if ( searchResults.size() < maxSearchResults )
-      searchResults.push_back( std::pair< QString, bool >( QString::fromStdU32String( i->word ), i->wasSuggested ) );
+      searchResults.emplace_back( QString::fromStdU32String( i.word ), i.wasSuggested );
     else
       break;
   }
 
-  if ( queuedRequests.size() )
-  {
+  if ( !queuedRequests.empty() ) {
     // There are still some unhandled results.
     emit updated();
   }
-  else
-  {
+  else {
     // That were all of them.
     searchInProgress = false;
     emit finished();
@@ -514,8 +479,6 @@ void WordFinder::updateResults()
 
 void WordFinder::cancelSearches()
 {
-  for( list< sptr< Dictionary::WordSearchRequest > >::iterator i =
-         queuedRequests.begin(); i != queuedRequests.end(); ++i )
-    (*i)->cancel();
+  for ( auto & queuedRequest : queuedRequests )
+    queuedRequest->cancel();
 }
-
diff --git a/src/wordfinder.hh b/src/wordfinder.hh
index 8e6d49c6..1838a735 100644
--- a/src/wordfinder.hh
+++ b/src/wordfinder.hh
@@ -22,15 +22,14 @@ class WordFinder: public QObject
 
 public:
 
-  typedef std::vector< std::pair< QString, bool > > SearchResults; // bool is a "was suggested" flag
+  using SearchResults = std::vector< std::pair< QString, bool > >; // bool is a "was suggested" flag
 
 private:
 
   SearchResults searchResults;
   QString searchErrorString;
   bool searchResultsUncertain;
-  std::list< sptr< Dictionary::WordSearchRequest > > queuedRequests,
-                                                     finishedRequests;
+  std::list< sptr< Dictionary::WordSearchRequest > > queuedRequests, finishedRequests;
   bool searchInProgress;
 
   QTimer updateResultsTimer;
diff --git a/src/wordlist.cc b/src/wordlist.cc
deleted file mode 100644
index dca31671..00000000
--- a/src/wordlist.cc
+++ /dev/null
@@ -1,109 +0,0 @@
-/* This file is (c) 2013 Tvangeste <i.4m.l33t@yandex.ru>
- * Part of GoldenDict. Licensed under GPLv3 or later, see the LICENSE file */
-
-
-#include "wordlist.hh"
-
-WordList::WordList( QWidget * parent ) : QListWidget( parent )
-, listItemDelegate( itemDelegate() )
-{
-  wordFinder = 0;
-  translateLine = 0;
-  setItemDelegate( &listItemDelegate );
-}
-
-void WordList::attachFinder( WordFinder * finder )
-{
-  // qDebug() << "Attaching the word finder..." << finder;
-
-  if ( wordFinder == finder )
-    return;
-
-  if ( wordFinder )
-  {
-    disconnect( wordFinder, &WordFinder::updated, this, &WordList::prefixMatchUpdated );
-    disconnect( wordFinder, &WordFinder::finished, this, &WordList::prefixMatchFinished );
-  }
-
-  wordFinder = finder;
-
-  connect( wordFinder, &WordFinder::updated, this, &WordList::prefixMatchUpdated );
-  connect( wordFinder, &WordFinder::finished, this, &WordList::prefixMatchFinished );
-}
-
-void WordList::prefixMatchUpdated()
-{
-  updateMatchResults( false );
-}
-
-void WordList::prefixMatchFinished()
-{
-  updateMatchResults( true );
-}
-
-void WordList::updateMatchResults( bool finished )
-{
-  WordFinder::SearchResults const & results = wordFinder->getResults();
-
-  setUpdatesEnabled( false );
-  //clear all existed items
-  clear();
-
-  for( unsigned x = 0; x < results.size(); ++x )
-  {
-    QListWidgetItem * i = new QListWidgetItem( results[ x ].first, this );
-    i->setToolTip( results[ x ].first );
-
-    if( results[ x ].second )
-    {
-      QFont f = i->font();
-      f.setItalic( true );
-      i->setFont( f );
-    }
-
-    i->setTextAlignment( Qt::AlignLeft );
-  }
-
-  if ( count() )
-  {
-    scrollToItem( item( 0 ), QAbstractItemView::PositionAtTop );
-    setCurrentItem( 0, QItemSelectionModel::Clear );
-  }
-
-  setUpdatesEnabled( true );
-
-  if ( finished )
-  {
-    unsetCursor();
-
-    refreshTranslateLine();
-
-    if ( !wordFinder->getErrorString().isEmpty() )
-      emit statusBarMessage(tr("WARNING: %1").arg(wordFinder->getErrorString()),
-                            20000, QPixmap(":/icons/error.svg"));
-  }
-
-  if( !results.empty() && results.front().first.isRightToLeft() )
-    setLayoutDirection( Qt::RightToLeft );
-  else
-    setLayoutDirection( Qt::LeftToRight );
-
-  emit contentChanged();
-}
-
-void WordList::refreshTranslateLine()
-{
-  if ( !translateLine )
-    return;
-
-  // Visually mark the input line to mark if there's no results
-  bool setMark = wordFinder->getResults().empty() && !wordFinder->wasSearchUncertain();
-
-  if ( translateLine->property( "noResults" ).toBool() != setMark )
-  {
-    translateLine->setProperty( "noResults", setMark );
-
-    Utils::Widget::setNoResultColor( translateLine, setMark );
-  }
-
-}
diff --git a/src/wordlist.hh b/src/wordlist.hh
deleted file mode 100644
index 26a04bae..00000000
--- a/src/wordlist.hh
+++ /dev/null
@@ -1,45 +0,0 @@
-/* This file is (c) 2013 Tvangeste <i.4m.l33t@yandex.ru>
- * Part of GoldenDict. Licensed under GPLv3 or later, see the LICENSE file */
-
-#ifndef WORDLIST_HH
-#define WORDLIST_HH
-
-#include <QListWidget>
-#include <QLineEdit>
-
-#include "wordfinder.hh"
-#include "delegate.hh"
-
-class WordList : public QListWidget
-{
-  Q_OBJECT
-public:
-  explicit WordList(QWidget * parent = 0);
-  void attachFinder(WordFinder * finder);
-  virtual void setTranslateLine(QLineEdit * line)
-  { translateLine = line; }
-
-protected:
-
-signals:
-  void statusBarMessage(QString const & message, int timeout = 0, QPixmap const & pixmap = QPixmap());
-  void contentChanged();
-
-public slots:
-
-private slots:
-  void prefixMatchUpdated();
-  void prefixMatchFinished();
-  void updateMatchResults( bool finished );
-
-private:
-  void refreshTranslateLine();
-
-  WordFinder * wordFinder;
-  QLineEdit * translateLine;
-  WordListItemDelegate listItemDelegate;
-
-  QVector< QSize > resizedSizes;
-};
-
-#endif // WORDLIST_HH