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
|
// 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 COMPONENTS_EXO_POINTER_STYLUS_DELEGATE_H_
#define COMPONENTS_EXO_POINTER_STYLUS_DELEGATE_H_
#include "base/time/time.h"
#include "ui/events/event_constants.h"
namespace gfx {
class Vector2dF;
}
namespace exo {
class Pointer;
// Handles tool-specific event details on pointers. Used as an extension to the
// PointerDelegate.
class PointerStylusDelegate {
public:
// Called at the top of the pointer's destructor, to give observers a
// chance to remove themselves.
virtual void OnPointerDestroying(Pointer* pointer) = 0;
// Called when the type of pointer device changes.
virtual void OnPointerToolChange(ui::EventPointerType type) = 0;
// Called when the force (pressure) of the pointer changes.
// Normalized to be [0, 1]. NaN means pressure is not supported by the
// input device.
virtual void OnPointerForce(base::TimeTicks time_stamp, float force) = 0;
// Called when the tilt of a pen/stylus changes. Measured from surface normal
// as plane angle in degrees, values lie in [-90,90]. A positive x is to the
// right and a positive y is towards the user. Always 0 if the device does
// not support it.
virtual void OnPointerTilt(base::TimeTicks time_stamp,
const gfx::Vector2dF& tilt) = 0;
protected:
virtual ~PointerStylusDelegate() = default;
};
} // namespace exo
#endif // COMPONENTS_EXO_POINTER_STYLUS_DELEGATE_H_
|
