content/browser/android/edge_effect.h

   1 // Copyright (c) 2013 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 CONTENT_BROWSER_ANDROID_EDGE_EFFECT_H_
   6 #define CONTENT_BROWSER_ANDROID_EDGE_EFFECT_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "content/browser/android/edge_effect_base.h"
  10
  11 namespace cc {
  12 class Layer;
  13 }
  14
  15 namespace ui {
  16 class ResourceManager;
  17 }
  18
  19 namespace content {
  20
  21 // |EdgeEffect| mirrors its Android counterpart, EdgeEffect.java.
  22 // Conscious tradeoffs were made to align this as closely as possible with the
  23 // the original Android java version.
  24 // All coordinates and dimensions are in device pixels.
  25 class EdgeEffect : public EdgeEffectBase {
  26  public:
  27   explicit EdgeEffect(ui::ResourceManager* resource_manager,
  28                       float device_scale_factor);
  29   ~EdgeEffect() override;
  30
  31   void Pull(base::TimeTicks current_time,
  32             float delta_distance,
  33             float displacement) override;
  34   void Absorb(base::TimeTicks current_time, float velocity) override;
  35   bool Update(base::TimeTicks current_time) override;
  36   void Release(base::TimeTicks current_time) override;
  37
  38   void Finish() override;
  39   bool IsFinished() const override;
  40   float GetAlpha() const override;
  41
  42   void ApplyToLayers(Edge edge,
  43                      const gfx::SizeF& viewport_size,
  44                      float offset) override;
  45   void SetParent(cc::Layer* parent) override;
  46
  47   // Thread-safe trigger to load resources.
  48   static void PreloadResources(ui::ResourceManager* resource_manager);
  49
  50  private:
  51   class EffectLayer;
  52   scoped_ptr<EffectLayer> edge_;
  53   scoped_ptr<EffectLayer> glow_;
  54
  55   float base_edge_height_;
  56   float base_glow_height_;
  57
  58   float edge_alpha_;
  59   float edge_scale_y_;
  60   float glow_alpha_;
  61   float glow_scale_y_;
  62
  63   float edge_alpha_start_;
  64   float edge_alpha_finish_;
  65   float edge_scale_y_start_;
  66   float edge_scale_y_finish_;
  67   float glow_alpha_start_;
  68   float glow_alpha_finish_;
  69   float glow_scale_y_start_;
  70   float glow_scale_y_finish_;
  71
  72   base::TimeTicks start_time_;
  73   base::TimeDelta duration_;
  74
  75   State state_;
  76
  77   float pull_distance_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(EdgeEffect);
  80 };
  81
  82 }  // namespace content
  83
  84 #endif  // CONTENT_BROWSER_ANDROID_EDGE_EFFECT_H_