Windows QPA: Move system tray icon implementation into the plugin

The system tray icon implementation relied on QMenu. After
the introduction of QPlatformSystemTrayIcon::contextMenuRequested(),
the code can be moved into the plugin, making use of native menus
when enabled or falling back to QMenu.
This enables the SystemTrayIcon QML Type to work.

[ChangeLog][QtGui][Windows] A native system tray icon is now
available for SystemTrayIcon.

Change-Id: I0fdbfb5cbb815c1ea6fb19305a9bceb9c5bcc034
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/plugins/platforms/windows/qwindowstheme.cpp b/src/plugins/platforms/windows/qwindowstheme.cpp
index 5fe7c7c071..3165835d2d 100644
--- a/src/plugins/platforms/windows/qwindowstheme.cpp
+++ b/src/plugins/platforms/windows/qwindowstheme.cpp
@@ -48,6 +48,9 @@
 #include "qwindowsdialoghelpers.h"
 #include "qwindowscontext.h"
 #include "qwindowsintegration.h"
+#if QT_CONFIG(systemtrayicon)
+#  include "qwindowssystemtrayicon.h"
+#endif
 #include "qt_windows.h"
 #include <commctrl.h>
 #include <objbase.h>
@@ -549,6 +552,13 @@ QPlatformDialogHelper *QWindowsTheme::createPlatformDialogHelper(DialogType type
     return QWindowsDialogs::createHelper(type);
 }
 
+#if QT_CONFIG(systemtrayicon)
+QPlatformSystemTrayIcon *QWindowsTheme::createPlatformSystemTrayIcon() const
+{
+    return new QWindowsSystemTrayIcon;
+}
+#endif
+
 void QWindowsTheme::windowsThemeChanged(QWindow * window)
 {
     refresh();