Platform-plugin support for QSystemTrayIcon.

Implement QPlatformSystemTrayIcon providing QPA-plugin-support for
system tray icons. Make QSystemTrayIcon use this as new backend.

Ported over qsystemtrayicon_mac.mm to qcocoasystemtrayicon.mm to provide
Cocoa support for the new interface. It had to be changed to match the
interface, especially for icon and menu handling.

This interface is made to not use QStyle or QMenu which are related
classes of QSystemTrayIcon. It's therefore not introducing QtWidget
dependency into the platform plugin.

Task-number: QTBUG-20978

Change-Id: I0d0a73835698b3b4f97219d4f5bbcfa2af57dbe2
Reviewed-by: Christoph Schleifenbaum <christoph.schleifenbaum@kdab.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/gui/kernel/qplatformtheme.h b/src/gui/kernel/qplatformtheme.h
index f80f9e59d8..5ead94cd17 100644
--- a/src/gui/kernel/qplatformtheme.h
+++ b/src/gui/kernel/qplatformtheme.h
@@ -63,6 +63,7 @@ class QPlatformMenuItem;
 class QPlatformMenu;
 class QPlatformMenuBar;
 class QPlatformDialogHelper;
+class QPlatformSystemTrayIcon;
 class QVariant;
 class QPalette;
 class QFont;
@@ -170,6 +171,10 @@ public:
     virtual bool usePlatformNativeDialog(DialogType type) const;
     virtual QPlatformDialogHelper *createPlatformDialogHelper(DialogType type) const;
 
+#ifndef QT_NO_SYSTEMTRAYICON
+    virtual QPlatformSystemTrayIcon *createPlatformSystemTrayIcon() const;
+#endif
+
     virtual const QPalette *palette(Palette type = SystemPalette) const;
 
     virtual const QFont *font(Font type = SystemFont) const;