pdf/thumbnail_control.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_THUMBNAIL_CONTROL_H_
   6 #define PDF_THUMBNAIL_CONTROL_H_
   7
   8 #include <map>
   9 #include <vector>
  10
  11 #include "pdf/control.h"
  12 #include "pdf/pdf_engine.h"
  13 #include "ppapi/cpp/input_event.h"
  14
  15 namespace chrome_pdf {
  16
  17 class NumberImageGenerator;
  18
  19 class ThumbnailControl : public Control {
  20  public:
  21   enum ThumbnailEventIds {
  22     EVENT_ID_THUMBNAIL_SELECTED = 100,
  23   };
  24
  25   explicit ThumbnailControl();
  26   virtual ~ThumbnailControl();
  27
  28   // Sets current position of the thumnail control.
  29   void SetPosition(int position, int total, bool invalidate);
  30   void SlideIn();
  31   void SlideOut();
  32
  33   virtual bool CreateThumbnailControl(
  34       uint32 id, const pp::Rect& rc,
  35       bool visible, Owner* owner, PDFEngine* engine,
  36       NumberImageGenerator* number_image_generator);
  37
  38   // Control interface.
  39   virtual void Show(bool visible, bool invalidate);
  40   virtual void Paint(pp::ImageData* image_data, const pp::Rect& rc);
  41   virtual bool HandleEvent(const pp::InputEvent& event);
  42   virtual void OnTimerFired(uint32 timer_id);
  43
  44   virtual void ResetEngine(PDFEngine* engine);
  45
  46  private:
  47   void ClearCache();
  48
  49   struct PageInfo {
  50     int index;
  51     pp::Rect rect;
  52   };
  53
  54   PDFEngine* engine_;
  55   pp::Rect visible_rect_;
  56   std::vector<PageInfo> visible_pages_;
  57   std::map<int, pp::ImageData*> image_cache_;
  58   int sliding_width_;
  59   int sliding_shift_;
  60   int sliding_timeout_;
  61   uint32 sliding_timer_id_;
  62   NumberImageGenerator* number_image_generator_;
  63 };
  64
  65 }  // namespace chrome_pdf
  66
  67 #endif  // PDF_THUMBNAIL_CONTROL_H_