X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/94aff5ff86189e39b7a95fc62e886374c060a2cf..773cca488793b26140468085d701ef2b702484a0:/src/msw/button.cpp

diff --git a/src/msw/button.cpp b/src/msw/button.cpp
index 7ca213e413..95f1ba1fa6 100644
--- a/src/msw/button.cpp
+++ b/src/msw/button.cpp
@@ -351,14 +351,37 @@ wxWindow *wxButton::SetDefault()
     // ... and Windows
     SetDefaultStyle(wxDynamicCast(winOldDefault, wxButton), false);
     SetDefaultStyle(this, true);
+
+    return winOldDefault;
+}
+
+// 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);
@@ -370,9 +393,9 @@ 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);
 
@@ -549,7 +572,8 @@ static void DrawButtonText(HDC hdc,
         // first we need to compute its bounding rect
         RECT rc;
         ::CopyRect(&rc, pRect);
-        ::DrawText(hdc, text, text.length(), &rc, DT_CENTER | DT_CALCRECT);
+        ::DrawText(hdc, text.wx_str(), text.length(), &rc,
+                   DT_CENTER | DT_CALCRECT);
 
         // now center this rect inside the entire button area
         const LONG w = rc.right - rc.left;
@@ -559,12 +583,12 @@ static void DrawButtonText(HDC hdc,
         rc.top = (pRect->bottom - pRect->top)/2 - h/2;
         rc.bottom = rc.top+h;
 
-        ::DrawText(hdc, text, text.length(), &rc, DT_CENTER);
+        ::DrawText(hdc, text.wx_str(), text.length(), &rc, DT_CENTER);
     }
     else // single line label
     {
         // Note: we must have DT_SINGLELINE for DT_VCENTER to work.
-        ::DrawText(hdc, text, text.length(), pRect,
+        ::DrawText(hdc, text.wx_str(), text.length(), pRect,
                    DT_SINGLELINE | DT_CENTER | DT_VCENTER);
     }