Method onAction

src/app/MenuBar.cpp:135–173

struct EditButton : MenuButton {
	void onAction(const ActionEvent& e) override {
		ui::Menu* menu = createMenu();
		menu->cornerFlags = BND_CORNER_TOP;
		menu->box.pos = getAbsoluteOffset(math::Vec(0, box.size.y));

		struct UndoItem : ui::MenuItem {
			void step() override {
				bool canUndo = APP->history->canUndo();
				text = canUndo ? string::f(string::translate("MenuBar.edit.undoAction"), APP->history->getUndoName()) : string::translate("MenuBar.edit.undo");
				disabled = !canUndo;
				MenuItem::step();
			}
			void onAction(const ActionEvent& e) override {
				APP->history->undo();
			}
		};
		menu->addChild(createMenuItem<UndoItem>("", widget::getKeyCommandName(GLFW_KEY_Z, RACK_MOD_CTRL)));

		struct RedoItem : ui::MenuItem {
			void step() override {
				bool canRedo = APP->history->canRedo();
				text = canRedo ? string::f(string::translate("MenuBar.edit.redoAction"), APP->history->getRedoName()) : string::translate("MenuBar.edit.redo");
				disabled = !canRedo;
				MenuItem::step();
			}
			void onAction(const ActionEvent& e) override {
				APP->history->redo();
			}
		};
		menu->addChild(createMenuItem<RedoItem>("", widget::getKeyCommandName(GLFW_KEY_Z, RACK_MOD_CTRL | GLFW_MOD_SHIFT)));

		menu->addChild(createMenuItem(string::translate("MenuBar.edit.clearCables"), "", [=]() {
			APP->patch->disconnectDialog();
		}));

		menu->addChild(new ui::MenuSeparator);

		APP->scene->rack->appendSelectionContextMenu(menu);
	}
};