Method mousePressEvent

src/frontend/worksheet/WorksheetView.cpp:896–920

}

void WorksheetView::mousePressEvent(QMouseEvent* event) {
	// prevent the deselection of items when context menu event
	// was triggered (right button click)
	if (event->button() == Qt::RightButton) {
		event->accept();
		return;
	}

	if (event->button() == Qt::LeftButton && m_mouseMode == MouseMode::ZoomSelection) {
		m_selectionStart = event->pos();
		m_selectionEnd = m_selectionStart; // select&zoom'g starts -> reset the end point to the start point
		m_selectionBandIsShown = true;
		QGraphicsView::mousePressEvent(event);
		return;
	}

	// select the worksheet in the project explorer if the view was clicked
	// and there is no selection currently. We need this for the case when
	// there is a single worksheet in the project and we change from the project-node
	// in the project explorer to the worksheet-node by clicking the view.
	if (scene()->selectedItems().isEmpty())
		m_worksheet->setSelectedInView(true);

	QGraphicsView::mousePressEvent(event);
}

void WorksheetView::mouseReleaseEvent(QMouseEvent* event) {
	if (event->button() == Qt::LeftButton && m_mouseMode == MouseMode::ZoomSelection) {