[gtk+] win32: Make grab cursors work again

[Alexander Larsson <alexl src gnome org>]

commit a2b879fe532f4d60ceb88d56f6b581a0a7aca3b1
Author: Alexander Larsson <alexl redhat com>
Date:   Thu Nov 10 21:32:50 2011 +0100

    win32: Make grab cursors work again

 gdk/win32/gdkdevice-win32.c  |   43 ++++++++++++++++++++++++++++-
 gdk/win32/gdkevents-win32.c  |   60 ++---------------------------------------
 gdk/win32/gdkprivate-win32.h |    2 +
 3 files changed, 46 insertions(+), 59 deletions(-)
---
diff --git a/gdk/win32/gdkdevice-win32.c b/gdk/win32/gdkdevice-win32.c
index 09ec36a..93fc519 100644
--- a/gdk/win32/gdkdevice-win32.c
+++ b/gdk/win32/gdkdevice-win32.c
@@ -318,8 +318,37 @@ gdk_device_win32_grab (GdkDevice    *device,
                        GdkCursor    *cursor,
                        guint32       time_)
 {
+  GdkWindowImplWin32 *impl = GDK_WINDOW_IMPL_WIN32 (window->impl);
+  HCURSOR hcursor;
+  GdkWin32Cursor *cursor_private;
+
+  cursor_private = (GdkWin32Cursor*) cursor;
+
   if (gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD)
-    SetCapture (GDK_WINDOW_HWND (window));
+    {
+      if (!cursor)
+	hcursor = NULL;
+      else if ((hcursor = CopyCursor (cursor_private->hcursor)) == NULL)
+	WIN32_API_FAILED ("CopyCursor");
+
+      if (_gdk_win32_grab_cursor != NULL)
+	{
+	  if (GetCursor () == _gdk_win32_grab_cursor)
+	    SetCursor (NULL);
+	  DestroyCursor (_gdk_win32_grab_cursor);
+	}
+
+      _gdk_win32_grab_cursor = hcursor;
+
+      if (_gdk_win32_grab_cursor != NULL)
+	SetCursor (_gdk_win32_grab_cursor);
+      else if (impl->hcursor != NULL)
+	SetCursor (impl->hcursor);
+      else
+	SetCursor (LoadCursor (NULL, IDC_ARROW));
+
+      SetCapture (GDK_WINDOW_HWND (window));
+    }
 
   return GDK_GRAB_SUCCESS;
 }
@@ -338,7 +367,17 @@ gdk_device_win32_ungrab (GdkDevice *device,
     info->serial_end = 0;
 
   if (gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD)
-    ReleaseCapture ();
+    {
+      if (_gdk_win32_grab_cursor != NULL)
+	{
+	  if (GetCursor () == _gdk_win32_grab_cursor)
+	    SetCursor (NULL);
+	  DestroyCursor (_gdk_win32_grab_cursor);
+	}
+      _gdk_win32_grab_cursor = NULL;
+
+      ReleaseCapture ();
+    }
 
   _gdk_display_device_grab_update (display, device, NULL, 0);
 }
diff --git a/gdk/win32/gdkevents-win32.c b/gdk/win32/gdkevents-win32.c
index 2627e79..6fc6f58 100644
--- a/gdk/win32/gdkevents-win32.c
+++ b/gdk/win32/gdkevents-win32.c
@@ -112,7 +112,7 @@ static gboolean gdk_event_dispatch (GSource     *source,
 static GList *client_filters;	/* Filters for client messages */
 extern gint       _gdk_input_ignore_core;
 
-static HCURSOR p_grab_cursor;
+HCURSOR _gdk_win32_grab_cursor;
 
 static GSourceFuncs event_funcs = {
   gdk_event_prepare,
@@ -445,60 +445,6 @@ event_mask_string (GdkEventMask mask)
 
 #endif
 
-GdkGrabStatus
-_gdk_windowing_device_grab (GdkDevice    *device,
-                            GdkWindow    *window,
-                            GdkWindow    *native_window,
-                            gboolean      owner_events,
-                            GdkEventMask	event_mask,
-                            GdkWindow    *confine_to,
-                            GdkCursor    *cursor,
-                            guint32	      time)
-{
-  HCURSOR hcursor;
-  GdkWin32Cursor *cursor_private;
-  gint return_val;
-  GdkWindowImplWin32 *impl = GDK_WINDOW_IMPL_WIN32 (native_window->impl);
-
-  g_return_val_if_fail (window != NULL, 0);
-  g_return_val_if_fail (GDK_IS_WINDOW (window), 0);
-  g_return_val_if_fail (confine_to == NULL || GDK_IS_WINDOW (confine_to), 0);
-  
-  cursor_private = (GdkWin32Cursor*) cursor;
-  
-  if (!cursor)
-    hcursor = NULL;
-  else if ((hcursor = CopyCursor (cursor_private->hcursor)) == NULL)
-    WIN32_API_FAILED ("CopyCursor");
-
-  return_val = GDK_DEVICE_GET_CLASS (device)->grab (device,
-                                                    native_window,
-                                                    owner_events,
-                                                    event_mask,
-                                                    confine_to,
-                                                    cursor,
-                                                    time);
-
-  /* TODO_CSW: grab brokens, confine window, input_grab */
-  if (p_grab_cursor != NULL)
-    {
-      if (GetCursor () == p_grab_cursor)
-        SetCursor (NULL);
-      DestroyCursor (p_grab_cursor);
-    }
-
-  p_grab_cursor = hcursor;
-
-  if (p_grab_cursor != NULL)
-    SetCursor (p_grab_cursor);
-  else if (impl->hcursor != NULL)
-    SetCursor (impl->hcursor);
-  else
-    SetCursor (LoadCursor (NULL, IDC_ARROW));
-
-  return return_val;
-}
-
 static GdkWindow *
 find_window_for_mouse_event (GdkWindow* reported_window,
 			     MSG*       msg)
@@ -2682,8 +2628,8 @@ gdk_event_translate (MSG  *msg,
       if (grab_window == NULL && LOWORD (msg->lParam) != HTCLIENT)
 	break;
 
-      if (grab_window != NULL && p_grab_cursor != NULL)
-	hcursor = p_grab_cursor;
+      if (grab_window != NULL && _gdk_win32_grab_cursor != NULL)
+	hcursor = _gdk_win32_grab_cursor;
       else if (!GDK_WINDOW_DESTROYED (window))
 	hcursor = GDK_WINDOW_IMPL_WIN32 (window->impl)->hcursor;
       else
diff --git a/gdk/win32/gdkprivate-win32.h b/gdk/win32/gdkprivate-win32.h
index c039c9e..c9625cb 100644
--- a/gdk/win32/gdkprivate-win32.h
+++ b/gdk/win32/gdkprivate-win32.h
@@ -356,6 +356,8 @@ extern GHashTable	*_format_atom_table;
 /* Hold the result of a delayed rendering */
 extern HGLOBAL		_delayed_rendering_data;
 
+extern HCURSOR _gdk_win32_grab_cursor;
+
 HGLOBAL _gdk_win32_selection_convert_to_dib (HGLOBAL  hdata,
 					     GdkAtom  target);