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
50
51
52
|
// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_TOUCH_SELECTION_TOUCH_SELECTION_DRAGGABLE_H_
#define UI_TOUCH_SELECTION_TOUCH_SELECTION_DRAGGABLE_H_
#include "ui/gfx/geometry/point_f.h"
#include "ui/touch_selection/ui_touch_selection_export.h"
namespace ui {
class MotionEvent;
class TouchSelectionDraggable;
// Interface through which TouchSelectionDraggable manipulates the selection.
class UI_TOUCH_SELECTION_EXPORT TouchSelectionDraggableClient {
public:
virtual ~TouchSelectionDraggableClient() {}
virtual void OnDragBegin(const TouchSelectionDraggable& draggable,
const gfx::PointF& start_position) = 0;
virtual void OnDragUpdate(const TouchSelectionDraggable& draggable,
const gfx::PointF& new_position) = 0;
virtual void OnDragEnd(const TouchSelectionDraggable& draggable) = 0;
virtual bool IsWithinTapSlop(const gfx::Vector2dF& delta) const = 0;
};
// Generic interface for entities that manipulate the selection via dragging.
class UI_TOUCH_SELECTION_EXPORT TouchSelectionDraggable {
public:
// GENERATED_JAVA_ENUM_PACKAGE: org.chromium.ui.touch_selection
// GENERATED_JAVA_CLASS_NAME_OVERRIDE: TouchSelectionDraggableType
enum class Type {
kNone,
kTouchHandle,
kLongpress,
};
protected:
virtual ~TouchSelectionDraggable() {}
// Offers a touch sequence to the draggable target. Returns true if the event
// was consumed, in which case the caller should cease further handling.
virtual bool WillHandleTouchEvent(const MotionEvent& event) = 0;
// Whether a drag is active OR being detected for the current touch sequence.
virtual bool IsActive() const = 0;
};
} // namespace ui
#endif // UI_TOUCH_SELECTION_TOUCH_SELECTION_DRAGGABLE_H_
|
