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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_ANDROID_EDGE_EFFECT_H_
#define UI_ANDROID_EDGE_EFFECT_H_
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "ui/android/edge_effect_base.h"
#include "ui/android/ui_android_export.h"
namespace cc {
class Layer;
}
namespace ui {
class ResourceManager;
}
namespace ui {
// |EdgeEffect| mirrors its Android counterpart, EdgeEffect.java.
// Conscious tradeoffs were made to align this as closely as possible with the
// the original Android java version.
// All coordinates and dimensions are in device pixels.
class UI_ANDROID_EXPORT EdgeEffect : public EdgeEffectBase {
public:
explicit EdgeEffect(ui::ResourceManager* resource_manager,
float device_scale_factor);
~EdgeEffect() override;
void Pull(base::TimeTicks current_time,
float delta_distance,
float displacement) override;
void Absorb(base::TimeTicks current_time, float velocity) override;
bool Update(base::TimeTicks current_time) override;
void Release(base::TimeTicks current_time) override;
void Finish() override;
bool IsFinished() const override;
float GetAlpha() const override;
void ApplyToLayers(Edge edge,
const gfx::SizeF& viewport_size,
float offset) override;
void SetParent(cc::Layer* parent) override;
// Thread-safe trigger to load resources.
static void PreloadResources(ui::ResourceManager* resource_manager);
private:
class EffectLayer;
scoped_ptr<EffectLayer> edge_;
scoped_ptr<EffectLayer> glow_;
float base_edge_height_;
float base_glow_height_;
float edge_alpha_;
float edge_scale_y_;
float glow_alpha_;
float glow_scale_y_;
float edge_alpha_start_;
float edge_alpha_finish_;
float edge_scale_y_start_;
float edge_scale_y_finish_;
float glow_alpha_start_;
float glow_alpha_finish_;
float glow_scale_y_start_;
float glow_scale_y_finish_;
base::TimeTicks start_time_;
base::TimeDelta duration_;
State state_;
float pull_distance_;
DISALLOW_COPY_AND_ASSIGN(EdgeEffect);
};
} // namespace ui
#endif // UI_ANDROID_EDGE_EFFECT_H_
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