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// Copyright 2017 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_VIEWS_WIN_PEN_EVENT_PROCESSOR_H_
#define UI_VIEWS_WIN_PEN_EVENT_PROCESSOR_H_
#include <windows.h>
#include <memory>
#include "ui/events/event.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/sequential_id_generator.h"
#include "ui/views/views_export.h"
namespace views {
// This class handles the processing pen event state information
// from native Windows events and returning appropriate
// ui::Events for the current state.
class VIEWS_EXPORT PenEventProcessor {
public:
// |id_generator| must outlive this object's lifecycle.
PenEventProcessor(ui::SequentialIDGenerator* id_generator,
bool direct_manipulation_enabled);
~PenEventProcessor();
// Generate an appropriate ui::Event for a given pen pointer.
// May return nullptr if no event should be dispatched.
std::unique_ptr<ui::Event> GenerateEvent(
UINT message,
UINT32 pointer_id,
const POINTER_PEN_INFO& pen_pointer_info,
const gfx::Point& point);
private:
std::unique_ptr<ui::Event> GenerateMouseEvent(
UINT message,
UINT32 pointer_id,
const POINTER_INFO& pointer_info,
const gfx::Point& point,
const ui::PointerDetails& pointer_details);
std::unique_ptr<ui::Event> GenerateTouchEvent(
UINT message,
UINT32 pointer_id,
const POINTER_INFO& pointer_info,
const gfx::Point& point,
const ui::PointerDetails& pointer_details);
ui::SequentialIDGenerator* id_generator_;
bool direct_manipulation_enabled_;
bool pen_in_contact_ = false;
bool send_touch_for_pen_ = false;
bool sent_mouse_down_ = false;
bool sent_touch_start_ = false;
int eraser_pointer_id_ = -1;
DISALLOW_COPY_AND_ASSIGN(PenEventProcessor);
};
} // namespace views
#endif // UI_VIEWS_WIN_PEN_EVENT_PROCESSOR_H_