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don't try to update TLW default button in WM_SET/KILLFOCUS handlers if the TLW is being deleted (bug 1660913) [backport from HEAD]

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@45958 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2007-05-11 13:04:33 +00:00
parent 843179c40f
commit 9038e724d3
1 changed files with 27 additions and 6 deletions
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33
src/msw/button.cpp
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@@ -357,12 +357,33 @@ void wxButton::SetDefault()
SetDefaultStyle(this, true);
}
// special version of wxGetTopLevelParent() which is safe to call when the
// parent is being destroyed: wxGetTopLevelParent() would just return NULL in
// this case because wxWindow version of IsTopLevel() is used when it's called
// during window destruction instead of wxTLW one, but we want to distinguish
// between these cases
static wxTopLevelWindow *GetTLWParentIfNotBeingDeleted(wxWindow *win)
{
for ( ; win; win = win->GetParent() )
{
if ( win->IsBeingDeleted() )
return NULL;
if ( win->IsTopLevel() )
break;
}
wxASSERT_MSG( win, _T("button without top level parent?") );
return wxDynamicCast(win, wxTopLevelWindow);
}
// set this button as being currently default
void wxButton::SetTmpDefault()
{
wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
wxCHECK_RET( tlw, _T("button without top level window?") );
wxTopLevelWindow * const tlw = GetTLWParentIfNotBeingDeleted(GetParent());
if ( !tlw )
return;
wxWindow *winOldDefault = tlw->GetDefaultItem();
tlw->SetTmpDefaultItem(this);
@@ -374,9 +395,9 @@ void wxButton::SetTmpDefault()
// unset this button as currently default, it may still stay permanent default
void wxButton::UnsetTmpDefault()
{
wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
wxCHECK_RET( tlw, _T("button without top level window?") );
wxTopLevelWindow * const tlw = GetTLWParentIfNotBeingDeleted(GetParent());
if ( !tlw )
return;
tlw->SetTmpDefaultItem(NULL);