Added DoGetClientBestSize() and use it for a couple of controls in wxMSW.

DoGetClientBestSize() returns the best size of the client area, without
accounting for the border which is done by GetBestSize() itself and
DoGetBorderSize() called from it.

Use DoGetClientBestSize() in wxStaticText (where it was done
insideDoGetBestSize() before) and in wxListBox, to fix its height calculation.

Also use correct height of listbox items as returned by the control itself
instead of trying to guess it.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61169 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/listbox.cpp

@@ -590,7 +590,7 @@ void wxListBox::SetHorizontalExtent(const wxString& s)
     //else: it shouldn't change
 }
 
-wxSize wxListBox::DoGetBestSize() const
+wxSize wxListBox::DoGetBestClientSize() const
 {
     // find the widest string
     int wLine;
@@ -609,22 +609,17 @@ wxSize wxListBox::DoGetBestSize() const
         wListbox = 100;
 
     // the listbox should be slightly larger than the widest string
-    int cx, cy;
-    wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
+    wListbox += 3*GetCharWidth();
 
-    wListbox += 3*cx;
-
-    // Add room for the scrollbar
+    // add room for the scrollbar
     wListbox += wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);
 
     // don't make the listbox too tall (limit height to 10 items) but don't
     // make it too small neither
-    int hListbox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)*
+    int hListbox = SendMessage(GetHwnd(), LB_GETITEMHEIGHT, 0, 0)*
                     wxMin(wxMax(m_noItems, 3), 10);
 
-    wxSize best(wListbox, hListbox);
-    CacheBestSize(best);
-    return best;
+    return wxSize(wListbox, hListbox);
 }
 
 // ----------------------------------------------------------------------------