[jimtabor] 23905: User32 combo.c: - Patch by Dmitry Timoshkov - do not force repainting on WM_WINDOWPOSCHANGED in combobox, it breaks Z-order based painting. - do nothing in the combobox WM_ERASEBKGND handler do all painting in WM_PAINT like Windows does.

Author: jimtabor
Date: Mon Sep  4 07:03:14 2006
New Revision: 23905

URL: http://svn.reactos.org/svn/reactos?rev=23905&view=rev
Log:
User32 combo.c:
 - Patch by Dmitry Timoshkov
  - do not force repainting on WM_WINDOWPOSCHANGED in combobox, it
    breaks Z-order based painting.
  - do nothing in the combobox WM_ERASEBKGND handler do all painting in
    WM_PAINT like Windows does.

Modified:
    trunk/reactos/dll/win32/user32/controls/combo.c
    trunk/reactos/media/doc/README.WINE

Modified: trunk/reactos/dll/win32/user32/controls/combo.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/user32/controls/c...
==============================================================================
--- trunk/reactos/dll/win32/user32/controls/combo.c (original)
+++ trunk/reactos/dll/win32/user32/controls/combo.c Mon Sep  4 07:03:14 2006
@@ -909,34 +909,6 @@
   return hBkgBrush;
 }

-/***********************************************************************
- *           COMBO_EraseBackground
- */
-static LRESULT COMBO_EraseBackground(
-  HWND        hwnd,
-  LPHEADCOMBO lphc,
-  HDC         hParamDC)
-{
-  HBRUSH  hBkgBrush;
-  HDC 	  hDC;
-
-  if(lphc->wState & CBF_EDIT)
-      return TRUE;
-
-  hDC = (hParamDC) ? hParamDC
-		   : GetDC(hwnd);
-  /*
-   * Retrieve the background brush
-   */
-  hBkgBrush = COMBO_PrepareColors(lphc, hDC);
-
-  FillRect(hDC, &lphc->textRect, hBkgBrush);
-
-  if (!hParamDC)
-    ReleaseDC(hwnd, hDC);
-
-  return TRUE;
-}

/***********************************************************************
  *           COMBO_Paint
@@ -962,6 +934,8 @@
       hBkgBrush = COMBO_PrepareColors(lphc, hDC);

hPrevBrush = SelectObject( hDC, hBkgBrush );
+      if (!(lphc->wState & CBF_EDIT))
+        FillRect(hDC, &lphc->textRect, hBkgBrush);

/*
        * In non 3.1 look, there is a sunken border on the combobox
@@ -1603,7 +1577,7 @@
 /***********************************************************************
  *           COMBO_Size
  */
-static void COMBO_Size( LPHEADCOMBO lphc )
+static void COMBO_Size( LPHEADCOMBO lphc, BOOL bRedraw )
   {
   CBCalcPlacement(lphc->self,
    	  lphc,
@@ -1611,7 +1585,7 @@
    	  &lphc->buttonRect,
    	  &lphc->droppedRect);

-  CBResetPos( lphc, &lphc->textRect, &lphc->droppedRect, TRUE );
+  CBResetPos( lphc, &lphc->textRect, &lphc->droppedRect, bRedraw );
 }

@@ -1904,15 +1878,15 @@
    }

case WM_PRINTCLIENT:
-	        if (lParam & PRF_ERASEBKGND)
-		  COMBO_EraseBackground(hwnd, lphc, (HDC)wParam);
-
    	/* Fallthrough */
      	case WM_PAINT:
    	/* wParam may contain a valid HDC! */
    	return  COMBO_Paint(lphc, (HDC)wParam);
+
    case WM_ERASEBKGND:
-		return  COMBO_EraseBackground(hwnd, lphc, (HDC)wParam);
+                /* do all painting in WM_PAINT like Windows does */
+                return 1;
+
    case WM_GETDLGCODE:
    {
    	LRESULT result = DLGC_WANTARROWS | DLGC_WANTCHARS;
@@ -1933,10 +1907,13 @@
          * get a WM_SIZE. Since we still want to update the Listbox, we have to
          * do it here.
          */
+        /* we should not force repainting on WM_WINDOWPOSCHANGED, it breaks
+         * Z-order based painting.
+         */
         /* fall through */
    case WM_SIZE:
            if( lphc->hWndLBox &&
-		  !(lphc->wState & CBF_NORESIZE) ) COMBO_Size( lphc );
+                  !(lphc->wState & CBF_NORESIZE) ) COMBO_Size( lphc, message == WM_SIZE );
    	return  TRUE;
    case WM_SETFONT:
    	COMBO_Font( lphc, (HFONT)wParam, (BOOL)lParam );

Modified: trunk/reactos/media/doc/README.WINE
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/media/doc/README.WINE?rev=2...
==============================================================================
--- trunk/reactos/media/doc/README.WINE (original)
+++ trunk/reactos/media/doc/README.WINE Mon Sep  4 07:03:14 2006
@@ -119,7 +119,7 @@

User32 -
   reactos/dll/win32/user32/controls/button.c    # Synced at 20060621
-  reactos/dll/win32/user32/controls/combo.c     # Synced at 20060617
+  reactos/dll/win32/user32/controls/combo.c     # Synced at 20060904
   reactos/dll/win32/user32/controls/edit.c      # Synced at 20060710
   reactos/dll/win32/user32/controls/icontitle.c # Synced at 20060617
   reactos/dll/win32/user32/controls/listbox.c   # Synced at 20060616