service/tray!: redesign menus / dbusmenu and add native menu support

Reworks dbusmenu menus to be displayable with a system context menu.

Breaks the entire DBusMenu api.

src/core/platformmenu.hpp

@@ -0,0 +1,72 @@
+#pragma once
+
+#include <functional>
+
+#include <qaction.h>
+#include <qactiongroup.h>
+#include <qcontainerfwd.h>
+#include <qmenu.h>
+#include <qobject.h>
+#include <qpoint.h>
+#include <qqmlintegration.h>
+#include <qqmllist.h>
+#include <qtclasshelpermacros.h>
+#include <qtmetamacros.h>
+
+#include "qsmenu.hpp"
+
+namespace qs::menu::platform {
+
+class PlatformMenuQMenu: public QMenu {
+public:
+	explicit PlatformMenuQMenu() = default;
+	~PlatformMenuQMenu() override;
+	Q_DISABLE_COPY_MOVE(PlatformMenuQMenu);
+
+	void setVisible(bool visible) override;
+
+	PlatformMenuQMenu* containingMenu = nullptr;
+};
+
+class PlatformMenuEntry: public QObject {
+	Q_OBJECT;
+
+public:
+	explicit PlatformMenuEntry(QsMenuEntry* menu);
+	~PlatformMenuEntry() override;
+	Q_DISABLE_COPY_MOVE(PlatformMenuEntry);
+
+	bool display(QObject* parentWindow, int relativeX, int relativeY);
+
+	static void registerCreationHook(std::function<void(PlatformMenuQMenu*)> hook);
+
+signals:
+	void closed();
+	void relayoutParent();
+
+public slots:
+	void relayout();
+
+private slots:
+	void onAboutToShow();
+	void onAboutToHide();
+	void onActionTriggered();
+	void onChildDestroyed();
+	void onEnabledChanged();
+	void onTextChanged();
+	void onIconChanged();
+	void onButtonTypeChanged();
+	void onCheckStateChanged();
+
+private:
+	void clearChildren();
+	void addToQMenu(PlatformMenuQMenu* menu);
+
+	QsMenuEntry* menu;
+	PlatformMenuQMenu* qmenu = nullptr;
+	QAction* qaction = nullptr;
+	QActionGroup* qactiongroup = nullptr;
+	QVector<PlatformMenuEntry*> childEntries;
+};
+
+} // namespace qs::menu::platform