Don't process WM_ERASEBKGND if we're being destroyed. This is at best useful
and at worst harmful as we currently crash in wxStaticBox::GetClientSize() if
there is no valid TLW parent.
Closes #14355.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71730
c3d73ce0-8a6f-49c7-b76d-
6d57e0e08775
bool wxWindowMSW::HandleEraseBkgnd(WXHDC hdc)
{
+ if ( IsBeingDeleted() )
+ {
+ // We can get WM_ERASEBKGND after starting the destruction of our top
+ // level parent. Handling it in this case is unnecessary and can be
+ // actually harmful as e.g. wxStaticBox::GetClientSize() doesn't work
+ // without a valid TLW parent (because it uses dialog units internally
+ // which use the dialog font), so just don't do anything then.
+ return false;
+ }
+
switch ( GetBackgroundStyle() )
{
case wxBG_STYLE_ERASE: