[gtk+/touch-for-3.4] gdk: translate correctly from touch events into emulated pointer events

[Carlos Garnacho <carlosg src gnome org>]

commit 7bd8d8969492cf6d526f38c8acf994c9b27ffe5f
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Feb 27 12:32:01 2012 +0100

    gdk: translate correctly from touch events into emulated pointer events

 gdk/gdkwindow.c |  103 ++++++++++++++++++++++++++++++++++++++----------------
 1 files changed, 72 insertions(+), 31 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 51b7e76..fc39f45 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -9371,8 +9371,10 @@ proxy_pointer_event (GdkDisplay                 *display,
       guint evmask;
       gboolean is_hint;
       GdkTouchSequence *touch_sequence;
+      GdkEventType event_type;
 
       touch_sequence = gdk_event_get_touch_sequence (source_event);
+      event_type = source_event->type;
 
       event_win = get_event_window (display,
                                     device,
@@ -9383,7 +9385,7 @@ proxy_pointer_event (GdkDisplay                 *display,
                                     &evmask,
                                     serial);
 
-      if (source_event->type == GDK_TOUCH_UPDATE)
+      if (event_type == GDK_TOUCH_UPDATE)
         {
           if (_gdk_event_get_pointer_emulated (source_event))
             {
@@ -9397,7 +9399,7 @@ proxy_pointer_event (GdkDisplay                 *display,
                */
               if ((evmask & GDK_TOUCH_MASK) == 0 ||
                   !_gdk_display_has_touch_grab (display, device, touch_sequence, serial))
-                source_event->type = GDK_MOTION_NOTIFY;
+                event_type = GDK_MOTION_NOTIFY;
             }
           else if ((evmask & GDK_TOUCH_MASK) == 0)
             return TRUE;
@@ -9424,7 +9426,7 @@ proxy_pointer_event (GdkDisplay                 *display,
       is_hint = FALSE;
 
       if (event_win &&
-          source_event->type == GDK_MOTION_NOTIFY &&
+          event_type == GDK_MOTION_NOTIFY &&
 	  (evmask & GDK_POINTER_MOTION_HINT_MASK))
 	{
           gulong *device_serial;
@@ -9447,30 +9449,53 @@ proxy_pointer_event (GdkDisplay                 *display,
 
       if (!display->ignore_core_events)
         {
-          GdkEventType event_type;
-
-          event_type = source_event->type;
-
           event = gdk_event_new (event_type);
           event->any.window = g_object_ref (event_win);
           event->any.send_event = source_event->any.send_event;
-          event->motion.time = time_;
-          convert_toplevel_coords_to_window (event_win,
-                                             toplevel_x, toplevel_y,
-                                             &event->motion.x, &event->motion.y);
-          event->motion.x_root = source_event->motion.x_root;
-          event->motion.y_root = source_event->motion.y_root;
-          event->motion.state = state;
-          event->motion.is_hint = is_hint;
-          event->motion.device = source_event->motion.device;
-          event->motion.axes = g_memdup (source_event->motion.axes,
-                                         sizeof (gdouble) * gdk_device_get_n_axes (source_event->motion.device));
+
+          gdk_event_set_device (event, gdk_event_get_device (source_event));
           gdk_event_set_source_device (event, source_device);
 
+          if (event_type == GDK_TOUCH_UPDATE)
+            {
+              event->touch.time = time_;
+              event->touch.state = state | GDK_BUTTON1_MASK;
+              event->touch.sequence = source_event->touch.sequence;
+              convert_toplevel_coords_to_window (event_win,
+                                                 toplevel_x, toplevel_y,
+                                                 &event->touch.x, &event->touch.y);
+              gdk_event_get_root_coords (source_event,
+                                         &event->touch.x_root,
+                                         &event->touch.y_root);
+
+              event->touch.axes = g_memdup (source_event->touch.axes,
+                                            sizeof (gdouble) * gdk_device_get_n_axes (source_event->touch.device));
+            }
+          else
+            {
+              event->motion.time = time_;
+              event->motion.state = state;
+              event->motion.is_hint = is_hint;
+
+              convert_toplevel_coords_to_window (event_win,
+                                                 toplevel_x, toplevel_y,
+                                                 &event->motion.x, &event->motion.y);
+              gdk_event_get_root_coords (source_event,
+                                         &event->motion.x_root,
+                                         &event->motion.y_root);
+
+              if (is_touch_type (source_event->type))
+                event->motion.axes = g_memdup (source_event->touch.axes,
+                                               sizeof (gdouble) * gdk_device_get_n_axes (source_event->touch.device));
+              else
+                event->motion.axes = g_memdup (source_event->motion.axes,
+                                               sizeof (gdouble) * gdk_device_get_n_axes (source_event->motion.device));
+            }
+
           /* Just insert the event */
           _gdk_event_queue_insert_after (gdk_window_get_display (event_win),
                                          source_event, event);
-	}
+        }
     }
 
   /* unlink all move events from queue.
@@ -9601,9 +9626,9 @@ proxy_button_event (GdkEvent *source_event,
               !_gdk_display_has_touch_grab (display, device, touch_sequence, serial))
             {
               if (type == GDK_TOUCH_BEGIN)
-                source_event->type = type = GDK_BUTTON_PRESS;
+                type = GDK_BUTTON_PRESS;
               else if (type == GDK_TOUCH_END)
-                source_event->type = type = GDK_BUTTON_RELEASE;
+                type = GDK_BUTTON_RELEASE;
             }
         }
       else if ((evmask & GDK_TOUCH_MASK) == 0)
@@ -9616,9 +9641,9 @@ proxy_button_event (GdkEvent *source_event,
       if (_gdk_event_get_pointer_emulated (source_event))
         {
           if (type == GDK_TOUCH_BEGIN)
-            source_event->type = type = GDK_BUTTON_PRESS;
+            type = GDK_BUTTON_PRESS;
           else if (type == GDK_TOUCH_END)
-            source_event->type = type = GDK_BUTTON_RELEASE;
+            type = GDK_BUTTON_RELEASE;
         }
       else
         return TRUE;
@@ -9668,14 +9693,29 @@ proxy_button_event (GdkEvent *source_event,
       convert_toplevel_coords_to_window (event_win,
 					 toplevel_x, toplevel_y,
 					 &event->button.x, &event->button.y);
-      event->button.x_root = source_event->button.x_root;
-      event->button.y_root = source_event->button.y_root;
+      gdk_event_get_root_coords (source_event,
+				 &event->button.x_root,
+				 &event->button.y_root);
+      gdk_event_set_device (event, gdk_event_get_device (source_event));
+      gdk_event_set_source_device (event, source_device);
+
       event->button.state = state;
-      event->button.device = source_event->button.device;
-      event->button.axes = g_memdup (source_event->button.axes,
-                                     sizeof (gdouble) * gdk_device_get_n_axes (source_event->button.device));
 
-      gdk_event_set_source_device (event, source_device);
+      if (type == GDK_BUTTON_RELEASE)
+	event->button.state |= GDK_BUTTON1_MASK;
+
+      if (is_touch_type (source_event->type))
+	{
+	  event->button.button = 1;
+	  event->button.axes = g_memdup (source_event->touch.axes,
+					 sizeof (gdouble) * gdk_device_get_n_axes (source_event->touch.device));
+	}
+      else
+	{
+	  event->button.button = source_event->button.button;
+	  event->button.axes = g_memdup (source_event->button.axes,
+					 sizeof (gdouble) * gdk_device_get_n_axes (source_event->button.device));
+	}
 
       if (type == GDK_BUTTON_PRESS)
         _gdk_event_button_generate (display, event);
@@ -9703,8 +9743,9 @@ proxy_button_event (GdkEvent *source_event,
       convert_toplevel_coords_to_window (event_win,
                                          toplevel_x, toplevel_y,
                                          &event->button.x, &event->button.y);
-      event->touch.x_root = source_event->touch.x_root;
-      event->touch.y_root = source_event->touch.y_root;
+      gdk_event_get_root_coords (source_event,
+				 &event->touch.x_root,
+				 &event->touch.y_root);
       event->touch.state = state;
       event->touch.device = source_event->touch.device;
       event->touch.axes = g_memdup (source_event->touch.axes,