pdf/fading_control.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef PDF_FADING_CONTROL_H_
   6 #define PDF_FADING_CONTROL_H_
   7
   8 #include "pdf/control.h"
   9
  10 namespace chrome_pdf {
  11
  12 class FadingControl : public Control {
  13  public:
  14   FadingControl();
  15   virtual ~FadingControl();
  16
  17   virtual void OnTimerFired(uint32 timer_id);
  18
  19   // Fade In/Out control depending on visible flag over the time of time_ms.
  20   virtual void Fade(bool visible, uint32 time_ms);
  21
  22   virtual void OnFadeInComplete() {}
  23   virtual void OnFadeOutComplete() {}
  24
  25  private:
  26   int alpha_shift_;
  27   uint32 timer_id_;
  28 };
  29
  30 }  // namespace chrome_pdf
  31
  32 #endif  // PDF_FADING_CONTROL_H_