Method createContextMenu

src/backend/core/AbstractAspect.cpp:316–432

* \brief Return a new context menu. * * The caller takes ownership of the menu. */

 * The caller takes ownership of the menu.
 */
QMenu* AbstractAspect::createContextMenu() {
	QMenu* menu = new QMenu();
	menu->addSection(this->name());

	// TODO: activate this again when the functionality is implemented
	// 	menu->addAction( KStandardAction::cut(this) );

	QAction* actionDuplicate = nullptr;
	if (!isFixed() && m_type != AspectType::Project && m_type != AspectType::Notebook) {
		// copy action:
		// don't allow to copy fixed aspects
		auto* action = KStandardAction::copy(this);
		connect(action, &QAction::triggered, this, &AbstractAspect::copy);
		menu->addAction(action);

		// duplicate action:
		// don't allow to duplicate legends in the plots
		if (m_type != AspectType::CartesianPlotLegend) {
			actionDuplicate = new QAction(QIcon::fromTheme(QLatin1String("edit-copy")), i18n("Duplicate Here"), this);
			actionDuplicate->setShortcut(Qt::CTRL | Qt::Key_D);
			connect(actionDuplicate, &QAction::triggered, this, &AbstractAspect::duplicate);
			menu->addAction(actionDuplicate);
		}
	}

	// paste action:
	// determine the aspect type of the content available in the clipboard
	// and enable the paste entry if the content is labplot specific
	// and if it can be pasted into the current aspect
	QString name;
	auto t = clipboardAspectType(name);
	if (t != AspectType::AbstractAspect && pasteTypes().indexOf(t) != -1) {
		auto* action = KStandardAction::paste(this);
		action->setText(i18n("Paste '%1'", name));
		if (actionDuplicate)
			menu->insertAction(actionDuplicate, action);
		else
			menu->addAction(action);
		connect(action, &QAction::triggered, [=]() {
			paste();
		});
	}
	menu->addSeparator();

	// action to create data spreadsheet based on the results of the calculations for types that support it
	QAction* actionDataSpreadsheet = new QAction(QIcon::fromTheme(QLatin1String("labplot-spreadsheet")), i18n("Create Data Spreadsheet"), this);

	// handle types that support it
	bool dataAvailable = false;
	if (const auto* analysisCurve = dynamic_cast<XYAnalysisCurve*>(this)) {
		if (analysisCurve->resultAvailable()) {
			connect(actionDataSpreadsheet, &QAction::triggered, static_cast<XYAnalysisCurve*>(this), &XYAnalysisCurve::createDataSpreadsheet);
			dataAvailable = true;
		}
	} else if (const auto* equationCurve = dynamic_cast<XYEquationCurve*>(this)) {
		if (equationCurve->dataAvailable()) {
			connect(actionDataSpreadsheet, &QAction::triggered, static_cast<XYEquationCurve*>(this), &XYEquationCurve::createDataSpreadsheet);
			dataAvailable = true;