문제

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.

도움이 되었습니까?

해결책

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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