Pregunta

Is there a way to catch resize events for docks in Qt? I need to be able to detect when a dock is resized (and not only when its location or 'features' change). It looks like there is no 'resized' signal for QDockWidget.

¿Fue útil?

Solución

If you do not wish to subclass to just get resize event control, you can installEventFilter

Small example would look like (MainWindow.h): (MainWindow holds DockWidget Here)

protected:
  bool eventFilter(QObject *obj, QEvent *event);

and in (MainWindow.cc):

MainWindow::MainWindow(QWidget* parent)
    : QWidget(parent) {
  ui_.setupUi(this);
  ui_.dockWidget->installEventFilter(this);
}

bool MainWindow::eventFilter(QObject *obj, QEvent *event) {
  if (event->type() == QEvent::Resize && obj == ui_.dockWidget) {
      QResizeEvent *resizeEvent = static_cast<QResizeEvent*>(event);
      qDebug("Dock Resized (New Size) - Width: %d Height: %d",
             resizeEvent->size().width(),
             resizeEvent->size().height());
  } 
  return QWidget::eventFilter(obj, event);
}
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