Added wxRichToolTip class.

It can be used to show more customizable tooltips than the native wxToolTip
but at the price of using generic implementation in some cases (actually
almost always now, with the exceptions of text control tooltips under MSW).

Extra features include:
 - The balloon-like tooltip form.
 - Possibility to show an icon.
 - Title display in a different form.

More customization could be added later. It should be also possible to fully
implement this class natively under MSW.

Update the dialogs sample to show the rich tooltips in action.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69463 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/nonownedwnd.h

@@ -32,5 +32,28 @@ public:
         This method is available in this class only since wxWidgets 2.9.3,
         previous versions only provided it in wxTopLevelWindow.
     */
-    virtual bool SetShape(const wxRegion& region);
+    bool SetShape(const wxRegion& region);
+
+    /**
+        Set the window shape to the given path.
+
+        Set the window shape to the interior of the given path and also draw
+        the window border along the specified path.
+
+        For example, to make a clock-like circular window you could use
+        @code
+            wxSize size = GetSize();
+            wxGraphicsPath
+                path = wxGraphicsRenderer::GetDefaultRenderer()->CreatePath();
+            path.AddCircle(size.x/2, size.y/2, 30);
+            SetShape(path);
+        @endcode
+
+        As the overload above, this method is not guaranteed to work on all
+        platforms but currently does work in wxMSW, wxOSX/Cocoa and wxGTK (with
+        the appropriate but almost always present X11 extensions) ports.
+
+        @since 2.9.3
+     */
+    bool SetShape(const wxGraphicsPath& path);
 };