Remove WM_SYNCPAINT message handler

It was added to work around what seemed to be an OS or graphics
driver issue on Windows XP. The issue was not reproducible on
Windows Vista anyway.

References:
* https://bugzilla.gnome.org/show_bug.cgi?id=153567
* https://gitlab.gnome.org/GNOME/gtk/-/commit/c8fef535
* https://devblogs.microsoft.com/oldnewthing/20120723-00/?p=7073

diff --git a/gdk/win32/gdkevents-win32.c b/gdk/win32/gdkevents-win32.c
index 6327cca1c2cc6e473966970cec097761f2554212..bc7590aa1322496fe479701a9c681949cf17e128 100644 (file)
--- a/gdk/win32/gdkevents-win32.c
+++ b/gdk/win32/gdkevents-win32.c
@@ -157,7 +157,6 @@ static HKL latin_locale = NULL;
 
 static gboolean in_ime_composition = FALSE;
 static UINT     modal_timer;
-static UINT     sync_timer = 0;
 
 static int debug_indent = 0;
 
@@ -1453,23 +1452,6 @@ _gdk_win32_end_modal_call (GdkWin32ModalOpKind kind)
     }
 }
 
-static VOID CALLBACK
-sync_timer_proc (HWND     hwnd,
-                UINT     msg,
-                UINT_PTR id,
-                DWORD    time)
-{
-  MSG message;
-  if (PeekMessageW (&message, hwnd, WM_PAINT, WM_PAINT, PM_REMOVE))
-    {
-      return;
-    }
-
-  RedrawWindow (hwnd, NULL, NULL, RDW_INVALIDATE|RDW_UPDATENOW|RDW_ALLCHILDREN);
-
-  KillTimer (hwnd, sync_timer);
-}
-
 static gboolean
 handle_nchittest (HWND hwnd,
                   GdkSurface *window,
@@ -2854,12 +2836,6 @@ gdk_event_translate (MSG *msg,
       *ret_valp = 1;
       break;
 
-    case WM_SYNCPAINT:
-      sync_timer = SetTimer (GDK_SURFACE_HWND (window),
-                            1,
-                            200, sync_timer_proc);
-      break;
-
     case WM_PAINT:
       handle_wm_paint (msg, window);
       break;