Fix for broken wxGTK1 compilation

[wxWidgets.git] / src / msw / window.cpp

diff --git a/src/msw/window.cpp b/src/msw/window.cpp
index a310475417b7de62d15bbcd49d0a80f2230287d8..165c03c207403833de03d066b2de8ae08f67cdf1 100644 (file)
--- a/src/msw/window.cpp
+++ b/src/msw/window.cpp
@@ -182,6 +182,13 @@
 extern wxMenu *wxCurrentPopupMenu;
 #endif
 
+#if wxUSE_UXTHEME
+// This is a hack used by the owner-drawn wxButton implementation to ensure
+// that the brush used for erasing its background is correctly aligned with the
+// control.
+extern wxWindowMSW *wxWindowBeingErased = NULL;
+#endif // wxUSE_UXTHEME
+
 namespace
 {
 
@@ -4884,9 +4891,30 @@ bool wxWindowMSW::DoEraseBackground(WXHDC hDC)
 }
 
 WXHBRUSH
-wxWindowMSW::MSWGetBgBrushForChild(WXHDC WXUNUSED(hDC),
-                                   wxWindowMSW * WXUNUSED(child))
+wxWindowMSW::MSWGetBgBrushForChild(WXHDC hDC, wxWindowMSW *child)
 {
+    // Test for the custom background brush first.
+    WXHBRUSH hbrush = MSWGetCustomBgBrush();
+    if ( hbrush )
+    {
+        // We assume that this is either a stipple or hatched brush and not a
+        // solid one as otherwise it would have been enough to set the
+        // background colour and such brushes need to be positioned correctly
+        // in order to align when different windows are painted, so do it here.
+        RECT rc;
+        ::GetWindowRect(GetHwndOf(child), &rc);
+
+        ::MapWindowPoints(NULL, GetHwnd(), (POINT *)&rc, 1);
+
+        if ( !::SetBrushOrgEx((HDC)hDC, -rc.left, -rc.top, NULL) )
+        {
+            wxLogLastError(wxT("SetBrushOrgEx(bg brush)"));
+        }
+
+        return hbrush;
+    }
+
+    // Otherwise see if we have a custom background colour.
     if ( m_hasBgCol )
     {
         wxBrush *
@@ -4900,9 +4928,17 @@ wxWindowMSW::MSWGetBgBrushForChild(WXHDC WXUNUSED(hDC),
 
 WXHBRUSH wxWindowMSW::MSWGetBgBrush(WXHDC hDC)
 {
+    // Use the special wxWindowBeingErased variable if it is set as the child
+    // being erased.
+    wxWindowMSW * const child =
+#if wxUSE_UXTHEME
+                                wxWindowBeingErased ? wxWindowBeingErased :
+#endif
+                                this;
+
     for ( wxWindowMSW *win = this; win; win = win->GetParent() )
     {
-        WXHBRUSH hBrush = win->MSWGetBgBrushForChild(hDC, this);
+        WXHBRUSH hBrush = win->MSWGetBgBrushForChild(hDC, child);
         if ( hBrush )
             return hBrush;