* Implemented BestSize cache

* Added calls to InvalidateBestSize where things affecting BestSize
  are modified.  There are probably several other places where this
  still needs to be done...

* Added wxWindowBase::GetBestFittingSize that will merge the BestSize
  into the MinSize, (if any) and return the result.

* SetBestFittingSize will now only set the MinSize to the value that
  was passed to it, without merging in the BestSize


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@28010 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/stattext.cpp

@@ -215,8 +215,8 @@ void wxStaticText::SetLabel(const wxString& label)
     // disabled
     if ( !(GetWindowStyle() & wxST_NO_AUTORESIZE) )
     {
+        InvalidateBestSize();
         DoSetSize(-1, -1, -1, -1, wxSIZE_AUTO_WIDTH | wxSIZE_AUTO_HEIGHT);
-        SetSizeHints(GetSize());
     }
 }
 
@@ -229,8 +229,8 @@ bool wxStaticText::SetFont(const wxFont& font)
     // disabled
     if ( !(GetWindowStyle() & wxST_NO_AUTORESIZE) )
     {
+        InvalidateBestSize();
         DoSetSize(-1, -1, -1, -1, wxSIZE_AUTO_WIDTH | wxSIZE_AUTO_HEIGHT);
-        SetSizeHints(GetSize());
     }
 
     return ret;