added a menu allowing to change the border style used by the widget

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38772 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/widgets/widgets.h

@@ -45,6 +45,14 @@ public:
     // some pages show 2 controls, in this case override this one as well
     virtual wxControl *GetWidget2() const { return NULL; }
 
+    // recreate the control shown by this page
+    //
+    // this is currently used only to take into account the border flags
+    virtual void RecreateWidget() = 0;
+
+    // the default flags for the widget, currently only contains border flags
+    static int ms_defaultFlags;
+
 protected:
     // several helper functions for page creation