[fireball] 46778: - Copy whole window bits when moving a window, SWM's job. Fixes "repainting" issues when moving a window.

Author: fireball
Date: Thu Apr  8 11:09:26 2010
New Revision: 46778

URL: http://svn.reactos.org/svn/reactos?rev=46778&view=rev
Log:
- Copy whole window bits when moving a window, SWM's job. Fixes "repainting"
issues when moving a window.

Modified:
    branches/arwinss/reactos/dll/win32/winent.drv/userdrv.c

Modified: branches/arwinss/reactos/dll/win32/winent.drv/userdrv.c
URL:
http://svn.reactos.org/svn/reactos/branches/arwinss/reactos/dll/win32/winen…
==============================================================================
--- branches/arwinss/reactos/dll/win32/winent.drv/userdrv.c [iso-8859-1] (original)
+++ branches/arwinss/reactos/dll/win32/winent.drv/userdrv.c [iso-8859-1] Thu Apr  8
11:09:26 2010
@@ -83,6 +83,23 @@
         else RedrawWindow( data->hwnd, NULL, rgn, RDW_INVALIDATE | RDW_ERASE |
RDW_ALLCHILDREN );
         DeleteObject( rgn );
     }
+}
+
+void swm_move_whole_window( struct ntdrv_win_data *data, const RECT *old_rect )
+{
+    HDC hdc_src, hdc_dst;
+    HWND parent;
+
+    parent = GetAncestor( data->hwnd, GA_PARENT );
+    hdc_src = GetDCEx( parent, 0, DCX_CACHE );
+    hdc_dst = GetDCEx( data->hwnd, 0, DCX_CACHE | DCX_WINDOW );
+
+    BitBlt( hdc_dst, 0, 0,
+        data->whole_rect.right - data->whole_rect.left, data->whole_rect.bottom
- data->whole_rect.top,
+        hdc_src, old_rect->left, old_rect->top, SRCCOPY );
+
+    ReleaseDC( data->hwnd, hdc_dst );
+    ReleaseDC( parent, hdc_src );
 }
 
 HKL CDECL RosDrv_ActivateKeyboardLayout( HKL layout, UINT flags )
@@ -936,7 +953,12 @@
 
     /* Sync position change */
     if (!(swp_flags & SWP_NOREDRAW)) // HACK: When removing this, explorer's
start menu starts to appear partially. Investigate!
+    {
         SwmPosChanged(hwnd, &data->whole_rect, &old_whole_rect, insert_after,
swp_flags);
+
+        /* SWM: Move whole window bits */
+        swm_move_whole_window( data, &old_whole_rect );
+    }
 
     /* Pass show/hide information to the window manager */
     if (swp_flags & SWP_SHOWWINDOW)