pdf/fading_controls.h

   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
  12 namespace chrome_pdf {
  13
  14 class 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