stage-window: Add :backend and :wrapper properties

All StageWindow implementation already have back pointers, but we need a
unified API to actually set them from the generic code path; we can use
properties on the StageWindow interface — though this requires fixing
all backends at the same time, to avoid GObject complaining.

clutter/clutter-stage-window.c

@@ -15,6 +15,25 @@ G_DEFINE_INTERFACE (ClutterStageWindow, clutter_stage_window, G_TYPE_OBJECT);
 static void
 clutter_stage_window_default_init (ClutterStageWindowInterface *iface)
 {
+  GParamSpec *pspec;
+
+  pspec = g_param_spec_object ("backend",
+                               "Backend",
+                               "Back pointer to the Backend instance",
+                               CLUTTER_TYPE_BACKEND,
+                               G_PARAM_WRITABLE |
+                               G_PARAM_CONSTRUCT_ONLY |
+                               G_PARAM_STATIC_STRINGS);
+  g_object_interface_install_property (iface, pspec);
+
+  pspec = g_param_spec_object ("wrapper",
+                               "Wrapper",
+                               "Back pointer to the Stage actor",
+                               CLUTTER_TYPE_STAGE,
+                               G_PARAM_WRITABLE |
+                               G_PARAM_CONSTRUCT_ONLY |
+                               G_PARAM_STATIC_STRINGS);
+  g_object_interface_install_property (iface, pspec);
 }
 
 ClutterActor *

clutter/cogl/clutter-stage-cogl.c

@@ -565,19 +565,8 @@ _clutter_stage_cogl_class_init (ClutterStageCoglClass *klass)
 
   gobject_class->set_property = clutter_stage_cogl_set_property;
 
-  g_object_class_install_property (gobject_class, PROP_WRAPPER,
-				   g_param_spec_object ("wrapper",
-							"Wrapper",
-							"ClutterStage wrapping this native stage",
-							CLUTTER_TYPE_STAGE,
-							CLUTTER_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
-
-  g_object_class_install_property (gobject_class, PROP_BACKEND,
-				   g_param_spec_object ("backend",
-							"ClutterBackend",
-							"The Clutter backend singleton",
-							CLUTTER_TYPE_BACKEND,
-							CLUTTER_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
+  g_object_class_override_property (gobject_class, PROP_WRAPPER, "wrapper");
+  g_object_class_override_property (gobject_class, PROP_BACKEND, "backend");
 }
 
 static void

clutter/osx/clutter-stage-osx.c

@@ -32,6 +32,14 @@
 
 #import <AppKit/AppKit.h>
 
+enum
+{
+  PROP_0,
+
+  PROP_BACKEND,
+  PROP_WRAPPER
+};
+
 static void clutter_stage_window_iface_init (ClutterStageWindowIface *iface);
 
 #define clutter_stage_osx_get_type      _clutter_stage_osx_get_type
@@ -608,15 +616,17 @@ _clutter_stage_osx_new (ClutterBackend *backend,
 {
   ClutterStageOSX *self;
 
-  self = g_object_new (CLUTTER_TYPE_STAGE_OSX, NULL);
-  self->backend = backend;
-  self->wrapper = wrapper;
+  self = g_object_new (CLUTTER_TYPE_STAGE_OSX,
+                       "backend", backend,
+                       "wrapper", wrapper,
+                       NULL);
+
   self->isHiding = false;
   self->haveRealized = false;
   self->view = NULL;
   self->window = NULL;
 
-  return CLUTTER_STAGE_WINDOW(self);
+  return CLUTTER_STAGE_WINDOW (self);
 }
 
 /*************************************************************************/
@@ -628,6 +638,30 @@ clutter_stage_osx_init (ClutterStageOSX *self)
   self->acceptFocus = TRUE;
 }
 
+static void
+clutter_stage_osx_set_property (GObject      *gobject,
+                                guint         prop_id,
+                                const GValue *value,
+                                GParamSpec   *pspec)
+{
+  ClutterStageOSX *self = CLUTTER_STAGE_OSX (gobject);
+
+  switch (prop_id)
+    {
+    case PROP_BACKEND:
+      self->backend = g_value_get_object (value);
+      break;
+
+    case PROP_WRAPPER:
+      self->wrapper = g_value_get_object (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
+      break;
+    }
+}
+
 static void
 clutter_stage_osx_finalize (GObject *gobject)
 {
@@ -645,6 +679,10 @@ clutter_stage_osx_class_init (ClutterStageOSXClass *klass)
 {
   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 
+  gobject_class->set_property = clutter_stage_osx_set_property;
   gobject_class->finalize = clutter_stage_osx_finalize;
   gobject_class->dispose = clutter_stage_osx_dispose;
+
+  g_object_class_override_property (gobject_class, PROP_BACKEND, "backend");
+  g_object_class_override_property (gobject_class, PROP_WRAPPER, "wrapper");
 }

clutter/wayland/clutter-stage-wayland.c

@@ -58,6 +58,14 @@ wayland_swap_buffers (ClutterStageWayland *stage_wayland);
 
 static void clutter_stage_window_iface_init (ClutterStageWindowIface *iface);
 
+enum
+{
+  PROP_0,
+
+  PROP_BACKEND,
+  PROP_WRAPPER
+};
+
 G_DEFINE_TYPE_WITH_CODE (ClutterStageWayland,
                          _clutter_stage_wayland,
                          G_TYPE_OBJECT,
@@ -427,9 +435,38 @@ clutter_stage_window_iface_init (ClutterStageWindowIface *iface)
   iface->ignoring_redraw_clips = clutter_stage_wayland_ignoring_redraw_clips;
 }
 
+static void
+clutter_stage_wayland_set_property (GObject      *gobject,
+                                    guint         prop_id,
+                                    const GValue *value,
+                                    GParamSpec   *pspec)
+{
+  ClutterStageWayland *self = CLUTTER_STAGE_WAYLAND (gobject);
+
+  switch (prop_id)
+    {
+    case PROP_BACKEND:
+      self->backend = g_value_get_object (value);
+      break;
+
+    case PROP_WRAPPER:
+      self->wrapper = g_value_get_object (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
+    }
+}
+
 static void
 _clutter_stage_wayland_class_init (ClutterStageWaylandClass *klass)
 {
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+  gobject_class->set_property = clutter_stage_wayland_set_property;
+
+  g_object_class_override_property (gobject_class, PROP_BACKEND, "backend");
+  g_object_class_override_property (gobject_class, PROP_WRAPPER, "wrapper");
 }
 
 static void

clutter/win32/clutter-stage-win32.c

@@ -42,6 +42,14 @@
 
 static void clutter_stage_window_iface_init (ClutterStageWindowIface *iface);
 
+enum
+{
+  PROP_0,
+
+  PROP_BACKEND,
+  PROP_WRAPPER
+};
+
 G_DEFINE_TYPE_WITH_CODE (ClutterStageWin32,
 			 clutter_stage_win32,
 			 G_TYPE_OBJECT,
@@ -544,6 +552,29 @@ clutter_stage_win32_get_active_framebuffer (ClutterStageWindow *stage_window)
   return COGL_FRAMEBUFFER (stage_win32->onscreen);
 }
 
+static void
+clutter_stage_win32_set_property (GObject      *gobject,
+                                  guint         prop_id,
+                                  const GValue *value,
+                                  GParamSpec   *pspec)
+{
+  ClutterStageWin32 *self = CLUTTER_STAGE_WIN32 (gobject);
+
+  switch (prop_id)
+    {
+    case PROP_BACKEND:
+      self->backend = g_value_get_object (value);
+      break;
+
+    case PROP_WRAPPER:
+      self->wrapper = g_value_get_object (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
+    }
+}
+
 static void
 clutter_stage_win32_dispose (GObject *gobject)
 {
@@ -569,7 +600,11 @@ clutter_stage_win32_class_init (ClutterStageWin32Class *klass)
 {
   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 
+  gobject_class->set_property = clutter_stage_win32_set_property;
   gobject_class->dispose = clutter_stage_win32_dispose;
+
+  g_object_class_override_property (gobject_class, PROP_BACKEND, "backend");
+  g_object_class_override_property (gobject_class, PROP_WRAPPER, "wrapper");
 }
 
 static void