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// Copyright (c) 2011 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_
#pragma once
#include "base/callback_old.h"
#include "base/memory/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_
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