Conditionalize use of gdk_pointer_grab / gdk_pointer_ungrab

On GTK3 there is support for multiple pointer devices, so
rather than using  gdk_pointer_grab / gdk_pointer_ungrab
we should iterate over all devices, grabbing each one in
turn
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
Message-id: 1361805646-6425-5-git-send-email-berrange@redhat.com
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

ui/gtk.c

@@ -807,25 +807,79 @@ static void gd_ungrab_keyboard(GtkDisplayState *s)
 #endif
 }
 
+static void gd_grab_pointer(GtkDisplayState *s)
+{
+#if GTK_CHECK_VERSION(3, 0, 0)
+    GdkDisplay *display = gtk_widget_get_display(s->drawing_area);
+    GdkDeviceManager *mgr = gdk_display_get_device_manager(display);
+    GList *devices = gdk_device_manager_list_devices(mgr,
+                                                     GDK_DEVICE_TYPE_MASTER);
+    GList *tmp = devices;
+    while (tmp) {
+        GdkDevice *dev = tmp->data;
+        if (gdk_device_get_source(dev) == GDK_SOURCE_MOUSE) {
+            gdk_device_grab(dev,
+                            gtk_widget_get_window(s->drawing_area),
+                            GDK_OWNERSHIP_NONE,
+                            FALSE, /* All events to come to our
+                                      window directly */
+                            GDK_POINTER_MOTION_MASK |
+                            GDK_BUTTON_PRESS_MASK |
+                            GDK_BUTTON_RELEASE_MASK |
+                            GDK_BUTTON_MOTION_MASK |
+                            GDK_SCROLL_MASK,
+                            s->null_cursor,
+                            GDK_CURRENT_TIME);
+        }
+        tmp = tmp->next;
+    }
+    g_list_free(devices);
+#else
+    gdk_pointer_grab(gtk_widget_get_window(s->drawing_area),
+                     FALSE, /* All events to come to our window directly */
+                     GDK_POINTER_MOTION_MASK |
+                     GDK_BUTTON_PRESS_MASK |
+                     GDK_BUTTON_RELEASE_MASK |
+                     GDK_BUTTON_MOTION_MASK |
+                     GDK_SCROLL_MASK,
+                     NULL, /* Allow cursor to move over entire desktop */
+                     s->null_cursor,
+                     GDK_CURRENT_TIME);
+#endif
+}
+
+static void gd_ungrab_pointer(GtkDisplayState *s)
+{
+#if GTK_CHECK_VERSION(3, 0, 0)
+    GdkDisplay *display = gtk_widget_get_display(s->drawing_area);
+    GdkDeviceManager *mgr = gdk_display_get_device_manager(display);
+    GList *devices = gdk_device_manager_list_devices(mgr,
+                                                     GDK_DEVICE_TYPE_MASTER);
+    GList *tmp = devices;
+    while (tmp) {
+        GdkDevice *dev = tmp->data;
+        if (gdk_device_get_source(dev) == GDK_SOURCE_MOUSE) {
+            gdk_device_ungrab(dev,
+                              GDK_CURRENT_TIME);
+        }
+        tmp = tmp->next;
+    }
+    g_list_free(devices);
+#else
+    gdk_pointer_ungrab(GDK_CURRENT_TIME);
+#endif
+}
+
 static void gd_menu_grab_input(GtkMenuItem *item, void *opaque)
 {
     GtkDisplayState *s = opaque;
 
     if (gd_is_grab_active(s)) {
         gd_grab_keyboard(s);
-        gdk_pointer_grab(gtk_widget_get_window(GTK_WIDGET(s->drawing_area)),
-                         FALSE, /* All events to come to our window directly */
-                         GDK_POINTER_MOTION_MASK |
-                         GDK_BUTTON_PRESS_MASK |
-                         GDK_BUTTON_RELEASE_MASK |
-                         GDK_BUTTON_MOTION_MASK |
-                         GDK_SCROLL_MASK,
-                         NULL, /* Allow cursor to move over entire desktop */
-                         s->null_cursor,
-                         GDK_CURRENT_TIME);
+        gd_grab_pointer(s);
     } else {
         gd_ungrab_keyboard(s);
-        gdk_pointer_ungrab(GDK_CURRENT_TIME);
+        gd_ungrab_pointer(s);
     }
 
     gd_update_caption(s);