goldendict-ng/src/ui/scanflag.cc

#include "scanflag.hh"
#include <QCursor>
#include <QGuiApplication>
#include <QScreen>


ScanFlag::ScanFlag( QWidget * parent ):
  QMainWindow( parent ),
  pushButton( new QPushButton( this ) )
{

  pushButton->setIcon( QIcon( ":/icons/programicon.png" ) );

  setCentralWidget( pushButton );

  setFixedSize( 30, 30 );

  setWindowFlags( Qt::ToolTip | Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::WindowDoesNotAcceptFocus );


  setAttribute( Qt::WA_TranslucentBackground );
  setAttribute( Qt::WA_X11DoNotAcceptFocus );

  hideTimer.setSingleShot( true );
  hideTimer.setInterval( 1000 );

  connect( &hideTimer, &QTimer::timeout, this, &ScanFlag::hideWindow );
  connect( pushButton, &QPushButton::clicked, this, &ScanFlag::pushButtonClicked );
}

void ScanFlag::pushButtonClicked()
{
  hideTimer.stop();
  hide();
  emit requestScanPopup();
}

void ScanFlag::hideWindow()
{
  if ( isVisible() )
    hide();
}

void ScanFlag::showScanFlag()
{
  if ( isVisible() )
    hide();

  QPoint currentPos = QCursor::pos();

  auto screen = QGuiApplication::screenAt( currentPos );
  if ( !screen )
    return;

  QRect desktop = screen->geometry();

  QSize windowSize = geometry().size();

  int x, y;

  /// Try the to-the-right placement
  if ( currentPos.x() + 4 + windowSize.width() <= desktop.topRight().x() ) {
    x = currentPos.x() + 4;
  }
  else if ( currentPos.x() - 4 - windowSize.width() >= desktop.x() ) {
    /// Try the to-the-left placement
    x = currentPos.x() - 4 - windowSize.width();
  }
  else { // Center it
    x = desktop.x() + ( desktop.width() - windowSize.width() ) / 2;
  }

  /// Try the to-the-top placement
  if ( currentPos.y() - 15 - windowSize.height() >= desktop.y() ) {
    y = currentPos.y() - 15 - windowSize.height();
  }
  else if ( currentPos.y() + 15 + windowSize.height() <= desktop.bottomLeft().y() ) {
    /// Try the to-the-bottom placement
    y = currentPos.y() + 15;
  }
  else { // Center it
    y = desktop.y() + ( desktop.height() - windowSize.height() ) / 2;
  }

  move( x, y );

  show();
  hideTimer.start();
}