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Diffstat (limited to 'views/repeat_controller.h')
-rw-r--r-- | views/repeat_controller.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/views/repeat_controller.h b/views/repeat_controller.h new file mode 100644 index 0000000..9e01dd1 --- /dev/null +++ b/views/repeat_controller.h @@ -0,0 +1,53 @@ +// 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_ |