1. added possibility to test setting tooltip for the widget

2. added WidgetPage::GetWidget2() for pages like the spin one which shows
   2 widgets and not only one


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@32440 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/widgets/widgets.h

@@ -42,6 +42,9 @@ public:
     // return the control shown by this page
     virtual wxControl *GetWidget() const = 0;
 
+    // some pages show 2 controls, in this case override this one as well
+    virtual wxControl *GetWidget2() const { return NULL; }
+
 protected:
     // several helper functions for page creation