blob: da9560f81a36eb278947034718fbbaf4b54f263f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
// 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 ASH_DISPLAY_EVENT_TRANSFORMATION_HANDLER_H_
#define ASH_DISPLAY_EVENT_TRANSFORMATION_HANDLER_H_
#include "ash/ash_export.h"
#include "base/compiler_specific.h"
#include "ui/events/event_handler.h"
namespace ash {
namespace internal {
// An event filter that transforms input event properties in extended desktop
// environment.
class ASH_EXPORT EventTransformationHandler : public ui::EventHandler {
public:
enum TransformationMode {
TRANSFORM_AUTO, // Transform events by the default amount.
// 1. Linear scaling w.r.t. the device scale factor.
// 2. Add 20% more for non-integrated displays.
TRANSFORM_NONE, // No transformation.
};
EventTransformationHandler();
virtual ~EventTransformationHandler();
void set_transformation_mode(TransformationMode transformation_mode) {
transformation_mode_ = transformation_mode;
}
// Overridden from ui::EventHandler.
virtual void OnScrollEvent(ui::ScrollEvent* event) OVERRIDE;
#if defined(OS_CHROMEOS)
virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
#endif // defined(OS_CHROMEOS)
private:
TransformationMode transformation_mode_;
DISALLOW_COPY_AND_ASSIGN(EventTransformationHandler);
};
} // namespace internal
} // namespace ash
#endif // ASH_DISPLAY_EVENT_TRANSFORMATION_HANDLER_H_
|
