blob: bfc246bb171f96a214bf938ea11776b73353f40a (
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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
// Copyright 2012 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 CC_ANIMATION_SCROLLBAR_ANIMATION_CONTROLLER_H_
#define CC_ANIMATION_SCROLLBAR_ANIMATION_CONTROLLER_H_
#include "base/cancelable_callback.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "cc/base/cc_export.h"
#include "cc/layers/layer_impl.h"
#include "cc/layers/scrollbar_layer_impl_base.h"
#include "ui/gfx/geometry/vector2d_f.h"
namespace cc {
class ScrollbarAnimationController;
class CC_EXPORT ScrollbarAnimationControllerClient {
public:
virtual void PostDelayedScrollbarAnimationTask(const base::Closure& task,
base::TimeDelta delay) = 0;
virtual void SetNeedsRedrawForScrollbarAnimation() = 0;
virtual void SetNeedsAnimateForScrollbarAnimation() = 0;
virtual ScrollbarSet ScrollbarsFor(int scroll_layer_id) const = 0;
protected:
virtual ~ScrollbarAnimationControllerClient() {}
};
// This abstract class represents the compositor-side analogy of
// ScrollbarAnimator. Individual platforms should subclass it to provide
// specialized implementation.
class CC_EXPORT ScrollbarAnimationController {
public:
virtual ~ScrollbarAnimationController();
bool Animate(base::TimeTicks now);
virtual void DidScrollBegin();
virtual void DidScrollUpdate(bool on_resize);
virtual void DidScrollEnd();
virtual void DidMouseMoveOffScrollbar() {}
virtual void DidMouseMoveNear(float distance) {}
protected:
ScrollbarAnimationController(int scroll_layer_id,
ScrollbarAnimationControllerClient* client,
base::TimeDelta delay_before_starting,
base::TimeDelta resize_delay_before_starting,
base::TimeDelta duration);
virtual void RunAnimationFrame(float progress) = 0;
void StartAnimation();
void StopAnimation();
ScrollbarSet Scrollbars() const;
ScrollbarAnimationControllerClient* client_;
private:
// Returns how far through the animation we are as a progress value from
// 0 to 1.
float AnimationProgressAtTime(base::TimeTicks now);
void PostDelayedAnimationTask(bool on_resize);
base::TimeTicks last_awaken_time_;
base::TimeDelta delay_before_starting_;
base::TimeDelta resize_delay_before_starting_;
base::TimeDelta duration_;
bool is_animating_;
int scroll_layer_id_;
bool currently_scrolling_;
bool scroll_gesture_has_scrolled_;
base::CancelableClosure delayed_scrollbar_fade_;
base::WeakPtrFactory<ScrollbarAnimationController> weak_factory_;
};
} // namespace cc
#endif // CC_ANIMATION_SCROLLBAR_ANIMATION_CONTROLLER_H_
|
