sys/ximage/ximagesink.c: Better X events handling, only take the latest events for configure and motion.

Original commit message from CVS:
2004-02-02  Julien MOUTTE  <julien@moutte.net>

* sys/ximage/ximagesink.c: (gst_ximagesink_renegotiate_size),
(gst_ximagesink_handle_xevents): Better X events handling, only take
the latest events for configure and motion.
* sys/xvimage/xvimagesink.c: (gst_xvimagesink_handle_xevents): same.

ChangeLog

@@ -1,3 +1,10 @@
+2004-02-02  Julien MOUTTE  <julien@moutte.net>
+
+	* sys/ximage/ximagesink.c: (gst_ximagesink_renegotiate_size),
+	(gst_ximagesink_handle_xevents): Better X events handling, only take
+	the latest events for configure and motion.
+	* sys/xvimage/xvimagesink.c: (gst_xvimagesink_handle_xevents): same.
+
 2004-02-02  Jon Trowbridge  <trow@gnu.org>
 
 	reviewed by: David Schleef  <ds@schleef.org>

sys/ximage/ximagesink.c

@@ -373,47 +373,22 @@ gst_ximagesink_xwindow_resize (GstXImageSink *ximagesink, GstXWindow *xwindow,
   g_mutex_unlock (ximagesink->x_lock);
 }
 
-/* This function handles XEvents that might be in the queue. It generates
-   GstEvent that will be sent upstream in the pipeline to handle interactivity
-   and navigation. It will also listen for configure events on the window to
-   trigger caps renegotiation so on the fly software scaling can work. */
 static void
-gst_ximagesink_handle_xevents (GstXImageSink *ximagesink, GstPad *pad)
+gst_ximagesink_renegotiate_size (GstXImageSink *ximagesink,
+                                 guint width, guint height)
 {
-  XEvent e;
-  
   g_return_if_fail (ximagesink != NULL);
   g_return_if_fail (GST_IS_XIMAGESINK (ximagesink));
   
-  /* We get all events on our window to throw them upstream */
-  g_mutex_lock (ximagesink->x_lock);
-  while (XCheckWindowEvent (ximagesink->xcontext->disp,
-                            ximagesink->xwindow->win,
-                            ExposureMask | StructureNotifyMask |
-                            PointerMotionMask | KeyPressMask |
-                            KeyReleaseMask | ButtonPressMask |
-                            ButtonReleaseMask, &e))
-    {
-      KeySym keysym;
+  /* Window got resized or moved. We do caps negotiation again to get video
+     scaler to fit that new size only if size of the window changed. */
   
-      /* We lock only for the X function call */
-      g_mutex_unlock (ximagesink->x_lock);
-      
-      switch (e.type)
-        {
-          case ConfigureNotify:
-            /* Window got resized or moved. We do caps negotiation
-               again to get video scaler to fit that new size only if size
-               of the window changed. */
-            GST_DEBUG ("ximagesink window is at %d, %d with geometry : %d,%d",
-                       e.xconfigure.x, e.xconfigure.y,
-                       e.xconfigure.width, e.xconfigure.height);
-            if ( (ximagesink->xwindow->width != e.xconfigure.width) ||
-                 (ximagesink->xwindow->height != e.xconfigure.height) )
+  if ( (ximagesink->xwindow->width != width) ||
+       (ximagesink->xwindow->height != height) )
     {
       GstPadLinkReturn r;
-                ximagesink->xwindow->width = e.xconfigure.width;
-                ximagesink->xwindow->height = e.xconfigure.height;
+      ximagesink->xwindow->width = width;
+      ximagesink->xwindow->height = height;
                 
       r = gst_pad_try_set_caps (GST_VIDEOSINK_PAD (ximagesink),
             gst_caps_new_simple ("video/x-raw-rgb",
@@ -423,41 +398,121 @@ gst_ximagesink_handle_xevents (GstXImageSink *ximagesink, GstPad *pad)
               "red_mask",   G_TYPE_INT, ximagesink->xcontext->visual->red_mask,
               "green_mask", G_TYPE_INT, ximagesink->xcontext->visual->green_mask,
               "blue_mask",  G_TYPE_INT, ximagesink->xcontext->visual->blue_mask,
-                      "width",      G_TYPE_INT, e.xconfigure.width,
-                      "height",     G_TYPE_INT, e.xconfigure.height,
+              "width",      G_TYPE_INT, width,
+              "height",     G_TYPE_INT, height,
               "framerate",  G_TYPE_DOUBLE, ximagesink->framerate,
               NULL));
 
       if ( (r == GST_PAD_LINK_OK) || (r == GST_PAD_LINK_DONE) )
         {
-                    GST_VIDEOSINK_WIDTH (ximagesink) = e.xconfigure.width;
-                    GST_VIDEOSINK_HEIGHT (ximagesink) = e.xconfigure.height;
+          GST_VIDEOSINK_WIDTH (ximagesink) = width;
+          GST_VIDEOSINK_HEIGHT (ximagesink) = height;
 
           if ( (ximagesink->ximage) &&
                ( (GST_VIDEOSINK_WIDTH (ximagesink) != ximagesink->ximage->width) ||
                  (GST_VIDEOSINK_HEIGHT (ximagesink) != ximagesink->ximage->height) ) )
             {
               /* We renew our ximage only if size changed */
-                        gst_ximagesink_ximage_destroy (ximagesink,
-                                                       ximagesink->ximage);
+              gst_ximagesink_ximage_destroy (ximagesink, ximagesink->ximage);
               
-                        ximagesink->ximage = gst_ximagesink_ximage_new (
-                                                            ximagesink,
+              ximagesink->ximage = gst_ximagesink_ximage_new (ximagesink,
                                              GST_VIDEOSINK_WIDTH (ximagesink),
                                              GST_VIDEOSINK_HEIGHT (ximagesink));
             }
         }
     }
+}
+
+/* This function handles XEvents that might be in the queue. It generates
+   GstEvent that will be sent upstream in the pipeline to handle interactivity
+   and navigation. It will also listen for configure events on the window to
+   trigger caps renegotiation so on the fly software scaling can work. */
+static void
+gst_ximagesink_handle_xevents (GstXImageSink *ximagesink, GstPad *pad)
+{
+  XEvent e;
+  guint new_width = 0, new_height = 0, pointer_x = 0, pointer_y = 0;
+  gboolean pointer_moved = FALSE;
+  
+  g_return_if_fail (ximagesink != NULL);
+  g_return_if_fail (GST_IS_XIMAGESINK (ximagesink));
+  
+  /* First we get all structure modification events. Only the last one is 
+     interesting */
+  g_mutex_lock (ximagesink->x_lock);
+  while (XCheckWindowEvent (ximagesink->xcontext->disp,
+                            ximagesink->xwindow->win,
+                            StructureNotifyMask, &e))
+    {
+      g_mutex_unlock (ximagesink->x_lock);
+      
+      switch (e.type)
+        {
+          case ConfigureNotify:
+            new_width = e.xconfigure.width;
+            new_height = e.xconfigure.height;
             break;
+          default:
+            break;
+        }
+        
+      g_mutex_lock (ximagesink->x_lock);
+    }
+  g_mutex_unlock (ximagesink->x_lock);
+    
+  if ( (new_width != 0) && (new_height != 0) )
+    {
+      GST_DEBUG ("ximagesink window geometry is : %d,%d",
+                 new_width, new_height);
+      gst_ximagesink_renegotiate_size (ximagesink, new_width, new_height);
+    }
+  
+  /* Then we get all pointer motion events, only the last position is
+     interesting. */
+  g_mutex_lock (ximagesink->x_lock);
+  while (XCheckWindowEvent (ximagesink->xcontext->disp,
+                            ximagesink->xwindow->win,
+                            PointerMotionMask, &e))
+    {
+      g_mutex_unlock (ximagesink->x_lock);
+      
+      switch (e.type)
+        {
           case MotionNotify:
-            /* Mouse pointer moved over our window. We send upstream
-               events for interactivity/navigation */
-            GST_DEBUG ("ximagesink pointer moved over window at %d,%d",
-                       e.xmotion.x, e.xmotion.y);
-            gst_navigation_send_mouse_event (GST_NAVIGATION (ximagesink),
-                                             "mouse-move", 0,
-                                             e.xmotion.x, e.xmotion.y);
+            pointer_x = e.xmotion.x;
+            pointer_y = e.xmotion.y;
+            pointer_moved = TRUE;
             break;
+          default:
+            break;
+        }
+        
+      g_mutex_lock (ximagesink->x_lock);
+    }
+  g_mutex_unlock (ximagesink->x_lock);
+
+  if (pointer_moved)
+    {
+      GST_DEBUG ("ximagesink pointer moved over window at %d,%d",
+                 pointer_x, pointer_y);
+      gst_navigation_send_mouse_event (GST_NAVIGATION (ximagesink),
+                                       "mouse-move", 0, pointer_x, pointer_y);
+    }
+    
+  /* We get all remaining events on our window to throw them upstream */
+  g_mutex_lock (ximagesink->x_lock);
+  while (XCheckWindowEvent (ximagesink->xcontext->disp,
+                            ximagesink->xwindow->win,
+                            KeyPressMask | KeyReleaseMask |
+                            ButtonPressMask | ButtonReleaseMask, &e))
+    {
+      KeySym keysym;
+      
+      /* We lock only for the X function call */
+      g_mutex_unlock (ximagesink->x_lock);
+      
+      switch (e.type)
+        {
           case ButtonPress:
             /* Mouse button pressed/released over our window. We send upstream
                events for interactivity/navigation */

sys/xvimage/xvimagesink.c

@@ -474,16 +474,49 @@ static void
 gst_xvimagesink_handle_xevents (GstXvImageSink *xvimagesink, GstPad *pad)
 {
   XEvent e;
+  guint pointer_x = 0, pointer_y = 0;
+  gboolean pointer_moved = FALSE;
   
   g_return_if_fail (xvimagesink != NULL);
   g_return_if_fail (GST_IS_XVIMAGESINK (xvimagesink));
   
+  /* We get all pointer motion events, only the last position is
+     interesting. */
+  g_mutex_lock (xvimagesink->x_lock);
+  while (XCheckWindowEvent (xvimagesink->xcontext->disp,
+                            xvimagesink->xwindow->win,
+                            PointerMotionMask, &e))
+    {
+      g_mutex_unlock (xvimagesink->x_lock);
+      
+      switch (e.type)
+        {
+          case MotionNotify:
+            pointer_x = e.xmotion.x;
+            pointer_y = e.xmotion.y;
+            pointer_moved = TRUE;
+            break;
+          default:
+            break;
+        }
+        
+      g_mutex_lock (xvimagesink->x_lock);
+    }
+  g_mutex_unlock (xvimagesink->x_lock);
+
+  if (pointer_moved)
+    {
+      GST_DEBUG ("xvimagesink pointer moved over window at %d,%d",
+                 pointer_x, pointer_y);
+      gst_navigation_send_mouse_event (GST_NAVIGATION (xvimagesink),
+                                       "mouse-move", 0, pointer_x, pointer_y);
+    }
+  
   /* We get all events on our window to throw them upstream */
   g_mutex_lock (xvimagesink->x_lock);
   while (XCheckWindowEvent (xvimagesink->xcontext->disp,
                             xvimagesink->xwindow->win,
-                            ExposureMask | StructureNotifyMask |
-                            PointerMotionMask | KeyPressMask |
+                            StructureNotifyMask | KeyPressMask |
                             KeyReleaseMask | ButtonPressMask |
                             ButtonReleaseMask, &e))
     {
@@ -502,15 +535,6 @@ gst_xvimagesink_handle_xevents (GstXvImageSink *xvimagesink, GstPad *pad)
             xvimagesink->xwindow->width = e.xconfigure.width;
             xvimagesink->xwindow->height = e.xconfigure.height;
             break;
-          case MotionNotify:
-            /* Mouse pointer moved over our window. We send upstream
-               events for interactivity/navigation */
-            GST_DEBUG ("xvimagesink pointer moved over window at %d,%d",
-                       e.xmotion.x, e.xmotion.y);
-            gst_navigation_send_mouse_event (GST_NAVIGATION (xvimagesink),
-                                             "mouse-move", 0, 
-                                             e.xmotion.x, e.xmotion.y);
-            break;
           case ButtonPress:
             /* Mouse button pressed over our window. We send upstream
                events for interactivity/navigation */