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// Copyright 2015 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 COMPONENTS_EXO_TOUCH_H_
#define COMPONENTS_EXO_TOUCH_H_
#include <vector>
#include "base/macros.h"
#include "components/exo/surface_observer.h"
#include "ui/events/event_handler.h"
#include "ui/gfx/geometry/point_f.h"
namespace ui {
class TouchEvent;
}
namespace exo {
class TouchDelegate;
class TouchStylusDelegate;
// This class implements a client touch device that represents one or more
// touch devices.
class Touch : public ui::EventHandler, public SurfaceObserver {
public:
explicit Touch(TouchDelegate* delegate);
~Touch() override;
TouchDelegate* delegate() const { return delegate_; }
// Set delegate for stylus events.
void SetStylusDelegate(TouchStylusDelegate* delegate);
bool HasStylusDelegate() const;
// Overridden from ui::EventHandler:
void OnTouchEvent(ui::TouchEvent* event) override;
// Overridden from SurfaceObserver:
void OnSurfaceDestroying(Surface* surface) override;
private:
// Returns the effective target for |event|.
Surface* GetEffectiveTargetForEvent(ui::Event* event) const;
// The delegate instance that all events are dispatched to.
TouchDelegate* const delegate_;
// The delegate instance that all stylus related events are dispatched to.
TouchStylusDelegate* stylus_delegate_ = nullptr;
// The current focus surface for the touch device.
Surface* focus_ = nullptr;
// Vector of touch points in focus surface.
std::vector<int> touch_points_;
DISALLOW_COPY_AND_ASSIGN(Touch);
};
} // namespace exo
#endif // COMPONENTS_EXO_TOUCH_H_
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