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+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef VIEWS_REPEAT_CONTROLLER_H_
+#define VIEWS_REPEAT_CONTROLLER_H_
+
+#include "base/scoped_ptr.h"
+#include "base/timer.h"
+
+namespace views {
+
+///////////////////////////////////////////////////////////////////////////////
+//
+// RepeatController
+//
+// An object that handles auto-repeating UI actions. There is a longer initial
+// delay after which point repeats become constant. Users provide a callback
+// that is notified when each repeat occurs so that they can perform the
+// associated action.
+//
+///////////////////////////////////////////////////////////////////////////////
+class RepeatController {
+ public:
+ typedef Callback0::Type RepeatCallback;
+
+ // The RepeatController takes ownership of this callback object.
+ explicit RepeatController(RepeatCallback* callback);
+ virtual ~RepeatController();
+
+ // Start repeating.
+ void Start();
+
+ // Stop repeating.
+ void Stop();
+
+ private:
+ RepeatController();
+
+ // Called when the timer expires.
+ void Run();
+
+ // The current timer.
+ base::OneShotTimer<RepeatController> timer_;
+
+ scoped_ptr<RepeatCallback> callback_;
+
+ DISALLOW_COPY_AND_ASSIGN(RepeatController);
+};
+
+} // namespace views
+
+#endif // #ifndef VIEWS_REPEAT_CONTROLLER_H_