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// Copyright 2014 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 CONTENT_BROWSER_WEB_CONTENTS_AURA_GESTURE_NAV_SIMPLE_H_
#define CONTENT_BROWSER_WEB_CONTENTS_AURA_GESTURE_NAV_SIMPLE_H_
#include "base/memory/scoped_ptr.h"
#include "content/browser/renderer_host/overscroll_controller_delegate.h"
namespace gfx {
class Transform;
}
namespace ui {
class Layer;
}
namespace content {
class ArrowLayerDelegate;
class WebContentsImpl;
// A simple delegate for the overscroll controller that paints an arrow on top
// of the web-contents as a hint for pending navigations from overscroll.
class GestureNavSimple : public OverscrollControllerDelegate {
public:
explicit GestureNavSimple(WebContentsImpl* web_contents);
virtual ~GestureNavSimple();
private:
void ApplyEffectsAndDestroy(const gfx::Transform& transform, float opacity);
void AbortGestureAnimation();
void CompleteGestureAnimation();
bool ApplyEffectsForDelta(float delta_x);
// OverscrollControllerDelegate:
virtual gfx::Rect GetVisibleBounds() const override;
// Returns true if the scroll update was consumed.
virtual bool OnOverscrollUpdate(float delta_x, float delta_y) override;
virtual void OnOverscrollComplete(OverscrollMode overscroll_mode) override;
virtual void OnOverscrollModeChange(OverscrollMode old_mode,
OverscrollMode new_mode) override;
WebContentsImpl* web_contents_;
scoped_ptr<ui::Layer> clip_layer_;
scoped_ptr<ui::Layer> arrow_;
scoped_ptr<ArrowLayerDelegate> arrow_delegate_;
float completion_threshold_;
DISALLOW_COPY_AND_ASSIGN(GestureNavSimple);
};
} // namespace content
#endif // CONTENT_BROWSER_WEB_CONTENTS_AURA_GESTURE_NAV_SIMPLE_H_
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