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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_FAST_INK_LASER_LASER_POINTER_VIEW_H_
#define ASH_FAST_INK_LASER_LASER_POINTER_VIEW_H_
#include "ash/fast_ink/fast_ink_points.h"
#include "ash/fast_ink/fast_ink_view.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "ui/views/widget/unique_widget_ptr.h"
namespace ash {
// LaserPointerView displays the palette tool laser pointer. It draws the laser,
// which consists of a point where the mouse cursor should be, as well as a
// trail of lines to help users track.
class LaserPointerView : public FastInkView {
public:
LaserPointerView(const LaserPointerView&) = delete;
LaserPointerView& operator=(const LaserPointerView&) = delete;
~LaserPointerView() override;
// Function to create a container Widget, initialize |cursor_view| and
// pass ownership as the contents view to the Widget.
static views::UniqueWidgetPtr Create(base::TimeDelta life_duration,
base::TimeDelta presentation_delay,
base::TimeDelta stationary_point_delay,
aura::Window* container);
void AddNewPoint(const gfx::PointF& new_point,
const base::TimeTicks& new_time);
void FadeOut(base::OnceClosure done);
private:
friend class LaserPointerControllerTestApi;
LaserPointerView(base::TimeDelta life_duration,
base::TimeDelta presentation_delay,
base::TimeDelta stationary_point_delay);
void AddPoint(const gfx::PointF& point, const base::TimeTicks& time);
void ScheduleUpdateBuffer();
void UpdateBuffer();
// Timer callback which adds a point where the stylus was last seen.
// This allows the trail to fade away when the stylus is stationary.
void UpdateTime();
gfx::Rect GetBoundingBox();
void Draw(gfx::Canvas& canvas);
FastInkPoints laser_points_;
FastInkPoints predicted_laser_points_;
const base::TimeDelta presentation_delay_;
// Timer which will add a new stationary point when the stylus stops moving.
// This will remove points that are too old.
base::RepeatingTimer stationary_timer_;
gfx::PointF stationary_point_location_;
// A callback for when the fadeout is complete.
base::OnceClosure fadeout_done_;
gfx::Rect laser_content_rect_;
bool pending_update_buffer_ = false;
base::WeakPtrFactory<LaserPointerView> weak_ptr_factory_{this};
};
} // namespace ash
#endif // ASH_FAST_INK_LASER_LASER_POINTER_VIEW_H_
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