1// Copyright (c) 2010 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_CONTROLS_H_
6#define PDF_FADING_CONTROLS_H_
7
8#include <list>
9
10#include "pdf/control.h"
11
12namespace chrome_pdf {
13
14class FadingControls : public Control,
15                       public ControlOwner {
16 public:
17  enum FadingState {
18    NONE,
19    FADING_IN,
20    FADING_OUT
21  };
22
23  FadingControls();
24  virtual ~FadingControls();
25  virtual bool CreateFadingControls(
26      uint32 id, const pp::Rect& rc, bool visible,
27      Control::Owner* delegate, uint8 transparency);
28
29  // Control interface.
30  virtual void Paint(pp::ImageData* image_data, const pp::Rect& rc);
31  virtual bool HandleEvent(const pp::InputEvent& event);
32  virtual void OnTimerFired(uint32 timer_id);
33  virtual void EventCaptureReleased();
34  virtual void MoveBy(const pp::Point& offset, bool invalidate);
35
36  // ControlOwner interface.
37  virtual void OnEvent(uint32 control_id, uint32 event_id, void* data);
38  virtual void Invalidate(uint32 control_id, const pp::Rect& rc);
39  virtual uint32 ScheduleTimer(uint32 control_id, uint32 timeout_ms);
40  virtual void SetEventCapture(uint32 control_id, bool set_capture);
41  virtual void SetCursor(uint32 control_id, PP_CursorType_Dev cursor_type);
42  virtual pp::Instance* GetInstance();
43
44  // FadingControls interface
45  // This function takes ownership of the control, and will destoy it
46  // when control is destroyed.
47  // Input control MUST be located inside FadingControls boundaries, and has
48  // this instance of FadingControls as a delegate.
49  virtual bool AddControl(Control* control);
50  virtual void RemoveControl(uint32 control_id);
51  virtual Control* GetControl(uint32 id);
52  virtual pp::Rect GetControlsRect();
53
54  // Expand/Shrink area which triggers inner control appearance to the left.
55  virtual bool ExpandLeft(int offset);
56
57  // Fade-in, then show controls for time_ms, and then fade-out. Any mouse
58  // event in this control area will interrupt splash mode.
59  virtual void Splash(uint32 time_ms);
60
61  uint8 current_transparency() const { return current_transparency_; }
62
63 private:
64  bool NotifyControls(const pp::InputEvent& event);
65  void FadeIn();
66  void FadeOut();
67  void OnFadingComplete();
68  void CancelSplashMode();
69
70  std::list<Control*> controls_;
71  FadingState state_;
72  uint8 current_transparency_;
73  uint32 fading_timer_id_;
74  uint32 current_capture_control_;
75  uint32 fading_timeout_;
76  uint32 alpha_shift_;
77  bool splash_;
78  uint32 splash_timeout_;
79};
80
81}  // namespace chrome_pdf
82
83#endif  // PDF_FADING_CONTROLS_H_
84
85