Method keyPressEvent

src/frontend/worksheet/WorksheetView.cpp:1027–1098

}

void WorksheetView::keyPressEvent(QKeyEvent* event) {
	// handle delete
	if (event->matches(QKeySequence::Delete)) {
		deleteElement();
		QGraphicsView::keyPressEvent(event);
		return;
	}

	// handle copy/paste/duplicate

	// determine the currently selected aspect
	AbstractAspect* aspect = nullptr;
	if (m_selectedItems.count() == 1) {
		// at the moment we allow to copy/paste/duplicate one single selcted object only
		const auto children = m_worksheet->children<WorksheetElement>(AbstractAspect::ChildIndexFlag::Recursive);
		const auto* item = m_selectedItems.constFirst();
		for (auto* child : children) {
			if (child->graphicsItem() == item) {
				aspect = child;
				break;
			}
		}
	} else
		aspect = m_worksheet;

	if (!aspect) {
		QGraphicsView::keyPressEvent(event);
		return;
	}

	if (event->matches(QKeySequence::Copy)) {
		exportToClipboard(); // export the image to the clipboard
		if (aspect != m_worksheet)
			aspect->copy(); // copy the selected object itself
	} else if (event->matches(QKeySequence::Paste)) {
		// paste
		QString name;
		auto t = AbstractAspect::clipboardAspectType(name);
		if (t != AspectType::AbstractAspect && aspect->pasteTypes().indexOf(t) != -1)
			aspect->paste();
	} else if ((event->modifiers() & Qt::ControlModifier) && (event->key() == Qt::Key_D) && aspect != m_worksheet) {
		// duplicate
		aspect->copy();
		aspect->parentAspect()->paste(true);

		/* zooming related key events, handle them here so we can also use them in PresenterWidget without registering shortcuts */
	} else if ((event->modifiers() & Qt::ControlModifier) && (event->key() == Qt::Key_Plus)) {
		changeZoom(zoomInViewAction);
	} else if ((event->modifiers() & Qt::ControlModifier) && (event->key() == Qt::Key_Minus)) {
		changeZoom(zoomOutViewAction);
	} else if ((event->modifiers() & Qt::ControlModifier) && (event->key() == Qt::Key_1)) {
		changeZoom(zoomOriginAction);
	} else if (event->key() == 32) {
		// space key - hide/show the current object
		auto* we = dynamic_cast<WorksheetElement*>(aspect);
		if (we)
			we->setVisible(!we->isVisible());
	} else if (aspect->type() == AspectType::CartesianPlot && m_worksheet->layout() != Worksheet::Layout::NoLayout) {