backported fix to wxSpinCtrl::GetClientSize() in wxMSW

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@52655 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -161,6 +161,8 @@ wxMSW:
 - Fixed rendering of borders for wxTextCtrl with wxTE_RICH(2) style when
   using Windows XP's Classic UI theme.
 - Text controls with wxTE_RICH style now also generate wxClipboardTextEvents.
+- Fixed wxSpinCtrl::GetClientSize() to return sensible value and not just
+  spin button's client size.
 
 wxGTK:
 

include/wx/msw/spinctrl.h

@@ -94,6 +94,10 @@ protected:
     virtual void DoMoveWindow(int x, int y, int width, int height);
     virtual wxSize DoGetBestSize() const;
     virtual void DoGetSize(int *width, int *height) const;
+#if wxABI_VERSION >= 20808
+    virtual void DoGetClientSize(int *x, int *y) const;
+#endif
+
 #if wxUSE_TOOLTIPS
     virtual void DoSetToolTip( wxToolTip *tip );
 #endif // wxUSE_TOOLTIPS

src/msw/spinctrl.cpp

@@ -681,6 +681,19 @@ void wxSpinCtrl::DoGetSize(int *x, int *y) const
         *y = ctrlrect.bottom - ctrlrect.top;
 }
 
+void wxSpinCtrl::DoGetClientSize(int *x, int *y) const
+{
+    RECT spinrect = wxGetClientRect(GetHwnd());
+    RECT textrect = wxGetClientRect(GetBuddyHwnd());
+    RECT ctrlrect;
+    UnionRect(&ctrlrect,&textrect, &spinrect);
+
+    if ( x )
+        *x = ctrlrect.right - ctrlrect.left;
+    if ( y )
+        *y = ctrlrect.bottom - ctrlrect.top;
+}
+
 void wxSpinCtrl::DoGetPosition(int *x, int *y) const
 {
     // hack: pretend that our HWND is the text control just for a moment