don't crash when trying to dump struct members which are NULL pointers

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

diff --git a/src/msw/window.cpp b/src/msw/window.cpp
index c332ba35effc6223edba8c3e93eb411442723db3..a17b0401d29e15b79db3bf669dff18bf5d3f0346 100644 (file)
--- a/src/msw/window.cpp
+++ b/src/msw/window.cpp
@@ -1122,7 +1122,7 @@ void wxWindowMSW::SetWindowStyleFlag(long flags)
 
         ::SetWindowLong(GetHwnd(), GWL_EXSTYLE, exstyleReal);
 
-        // we must call SetWindowPos() to flash the cached extended style and
+        // we must call SetWindowPos() to flush the cached extended style and
         // also to make the change to wxSTAY_ON_TOP style take effect: just
         // setting the style simply doesn't work
         if ( !::SetWindowPos(GetHwnd(),
@@ -1297,7 +1297,8 @@ void wxWindowMSW::Freeze()
 {
     if ( !m_frozenness++ )
     {
-        SendSetRedraw(GetHwnd(), false);
+        if ( IsShown() )
+            SendSetRedraw(GetHwnd(), false);
     }
 }
 
@@ -1307,11 +1308,14 @@ void wxWindowMSW::Thaw()
 
     if ( !--m_frozenness )
     {
-        SendSetRedraw(GetHwnd(), true);
+        if ( IsShown() )
+        {
+            SendSetRedraw(GetHwnd(), true);
 
-        // we need to refresh everything or otherwise he invalidated area is not
-        // repainted
-        Refresh();
+            // we need to refresh everything or otherwise the invalidated area
+            // is not going to be repainted
+            Refresh();
+        }
     }
 }
 
@@ -1320,18 +1324,27 @@ void wxWindowMSW::Refresh(bool eraseBack, const wxRect *rect)
     HWND hWnd = GetHwnd();
     if ( hWnd )
     {
+        RECT mswRect;
+        const RECT *pRect;
         if ( rect )
         {
-            RECT mswRect;
             mswRect.left = rect->x;
             mswRect.top = rect->y;
             mswRect.right = rect->x + rect->width;
             mswRect.bottom = rect->y + rect->height;
 
-            ::InvalidateRect(hWnd, &mswRect, eraseBack);
+            pRect = &mswRect;
         }
         else
-            ::InvalidateRect(hWnd, NULL, eraseBack);
+        {
+            pRect = NULL;
+        }
+
+        UINT flags = RDW_INVALIDATE | RDW_ALLCHILDREN;
+        if ( eraseBack )
+            flags |= RDW_ERASE;
+
+        ::RedrawWindow(hWnd, pRect, NULL, flags);
     }
 }
 
@@ -1507,12 +1520,12 @@ void wxWindowMSW::DoMoveWindow(int x, int y, int width, int height)
     // if our parent had prepared a defer window handle for us, use it (unless
     // we are a top level window)
     wxWindowMSW *parent = GetParent();
-    HDWP hdwp = (parent && !IsTopLevel()) ? (HDWP)parent->m_hDWP : NULL;
+    HDWP hdwp = parent && !IsTopLevel() ? (HDWP)parent->m_hDWP : NULL;
     if ( hdwp )
     {
         hdwp = ::DeferWindowPos(hdwp, GetHwnd(), NULL,
-                                x, y, width, height,
-                                SWP_NOZORDER);
+                            x, y, width, height,
+                            SWP_NOZORDER);
         if ( !hdwp )
         {
             wxLogLastError(_T("DeferWindowPos"));