Add minimize feature to QWindow using wayland's xdg-shell

The feature is disabled by default,
and can be enabled at runtime
by exporting QT_WAYLAND_USE_XDG_SHELL env variable.

This patch relies on presence of protocol file
which has been imported from weston-1.4.0 sources,
until the xdg-shell is merge into wayland itself.

Because xdg-shell is experimental,
code fallback to WaylandShell if no XdgShell
but keep in mind those shells are exclusive.

Since xdg-shell and wayland-shell share most of the API,
some factorization is done by an (empty) abstraction class
to keep the code more readable.

Despite xdg-shell introduces new popups concept,
they're not used on this change for maitainance purpose.

Notes:

* This change depends on presence of xdg-shell protocol file.

* You can check a demo video
  (qt-tizen-cinematic-experience-20140430-rzr)
  of the test case at :
  https://www.youtube.com/watch?v=pY_XXvKc_0E#

* Use Super+Tab to show window again if hidden

Task-number: QTBUG-38633/part/2of2
Change-Id: I2d7ed85bea1847d82439fdfc893a3dbb2581c14a
Reviewed-by: Giulio Camuffo <giulio.camuffo@jollamobile.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/client/qwaylanddisplay_p.h b/src/client/qwaylanddisplay_p.h
index 40cb2b2c5..cf5dfc21d 100644
--- a/src/client/qwaylanddisplay_p.h
+++ b/src/client/qwaylanddisplay_p.h
@@ -51,6 +51,7 @@
 
 #include <QtWaylandClient/private/qwayland-wayland.h>
 #include <QtWaylandClient/private/qwaylandclientexport_p.h>
+#include <QtWaylandClient/private/qwayland-xdg-shell.h>
 
 struct wl_cursor_image;
 
@@ -78,6 +79,7 @@ namespace QtWayland {
     class qt_sub_surface_extension;
     class qt_surface_extension;
     class wl_text_input_manager;
+    class xdg_shell;
 }
 
 typedef void (*RegistryListener)(void *data,
@@ -113,6 +115,7 @@ public:
     QtWayland::wl_compositor *compositor() { return &mCompositor; }
 
     QtWayland::wl_shell *shell() { return mShell.data(); }
+    QtWayland::xdg_shell *shellXdg() { return mShellXdg.data(); }
 
     QList<QWaylandInputDevice *> inputDevices() const { return mInputDevices; }
     QWaylandInputDevice *defaultInputDevice() const;
@@ -168,6 +171,7 @@ private:
     QThread *mEventThread;
     QWaylandEventThread *mEventThreadObject;
     QScopedPointer<QtWayland::wl_shell> mShell;
+    QScopedPointer<QtWayland::xdg_shell> mShellXdg;
     QList<QPlatformScreen *> mScreens;
     QList<QWaylandInputDevice *> mInputDevices;
     QList<Listener> mRegistryListeners;