Add a CefHandler::HandleSetFocus() callback that gets called when the browser control or a child widget requests focus. This callback gives the client an opportunity to cancel the focus change. (Issue #34, initial patch by tux316).

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@29 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

include/cef.h

@@ -525,11 +525,18 @@ public:
   virtual RetVal HandleTakeFocus(CefRefPtr<CefBrowser> browser,
                                  bool reverse) =0;
 
-  // Event called for adding values to a frame's JavaScript 'window' object. The
+  // Event called for adding values to a frame's JavaScript 'window' object. The
   // return value is currently ignored.
   virtual RetVal HandleJSBinding(CefRefPtr<CefBrowser> browser,
                                  CefRefPtr<CefFrame> frame,
                                  CefRefPtr<CefV8Value> object) =0;
+
+  // Called when the browser component is requesting focus. |isWidget| will be
+  // true if the focus is requested for a child widget of the browser window.
+  // Return RV_CONTINUE to allow the focus to be set or RV_HANDLED to cancel
+  // setting the focus.
+  virtual RetVal HandleSetFocus(CefRefPtr<CefBrowser> browser,
+                                bool isWidget) =0;
 };