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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
// Copyright (c) 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.
#include "ui/views/controls/throbber.h"
#include "base/time/time.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/image/image.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/resources/grit/ui_resources.h"
using base::Time;
using base::TimeDelta;
namespace views {
Throbber::Throbber(int frame_time_ms,
bool paint_while_stopped)
: running_(false),
paint_while_stopped_(paint_while_stopped),
frames_(NULL),
frame_time_(TimeDelta::FromMilliseconds(frame_time_ms)) {
SetFrames(ui::ResourceBundle::GetSharedInstance().GetImageNamed(
IDR_THROBBER).ToImageSkia());
}
Throbber::~Throbber() {
Stop();
}
void Throbber::Start() {
if (running_)
return;
start_time_ = Time::Now();
timer_.Start(FROM_HERE, frame_time_ - TimeDelta::FromMilliseconds(10),
this, &Throbber::Run);
running_ = true;
SchedulePaint(); // paint right away
}
void Throbber::Stop() {
if (!running_)
return;
timer_.Stop();
running_ = false;
SchedulePaint(); // Important if we're not painting while stopped
}
void Throbber::SetFrames(const gfx::ImageSkia* frames) {
frames_ = frames;
DCHECK(frames_->width() > 0 && frames_->height() > 0);
DCHECK(frames_->width() % frames_->height() == 0);
frame_count_ = frames_->width() / frames_->height();
PreferredSizeChanged();
}
void Throbber::Run() {
DCHECK(running_);
SchedulePaint();
}
gfx::Size Throbber::GetPreferredSize() const {
return gfx::Size(frames_->height(), frames_->height());
}
void Throbber::OnPaint(gfx::Canvas* canvas) {
if (!running_ && !paint_while_stopped_)
return;
const TimeDelta elapsed_time = Time::Now() - start_time_;
const int current_frame =
static_cast<int>(elapsed_time / frame_time_) % frame_count_;
int image_size = frames_->height();
int image_offset = current_frame * image_size;
canvas->DrawImageInt(*frames_,
image_offset, 0, image_size, image_size,
0, 0, image_size, image_size,
false);
}
// Smoothed throbber ---------------------------------------------------------
// Delay after work starts before starting throbber, in milliseconds.
static const int kStartDelay = 200;
// Delay after work stops before stopping, in milliseconds.
static const int kStopDelay = 50;
SmoothedThrobber::SmoothedThrobber(int frame_time_ms)
: Throbber(frame_time_ms, /* paint_while_stopped= */ false),
start_delay_ms_(kStartDelay),
stop_delay_ms_(kStopDelay) {
}
SmoothedThrobber::~SmoothedThrobber() {}
void SmoothedThrobber::Start() {
stop_timer_.Stop();
if (!running_ && !start_timer_.IsRunning()) {
start_timer_.Start(FROM_HERE, TimeDelta::FromMilliseconds(start_delay_ms_),
this, &SmoothedThrobber::StartDelayOver);
}
}
void SmoothedThrobber::StartDelayOver() {
Throbber::Start();
}
void SmoothedThrobber::Stop() {
if (!running_)
start_timer_.Stop();
stop_timer_.Stop();
stop_timer_.Start(FROM_HERE, TimeDelta::FromMilliseconds(stop_delay_ms_),
this, &SmoothedThrobber::StopDelayOver);
}
void SmoothedThrobber::StopDelayOver() {
Throbber::Stop();
}
// Checkmark throbber ---------------------------------------------------------
CheckmarkThrobber::CheckmarkThrobber()
: Throbber(kFrameTimeMs, false),
checked_(false),
checkmark_(ui::ResourceBundle::GetSharedInstance().GetImageNamed(
IDR_CHECKMARK).ToImageSkia()) {
}
void CheckmarkThrobber::SetChecked(bool checked) {
bool changed = checked != checked_;
if (changed) {
checked_ = checked;
SchedulePaint();
}
}
void CheckmarkThrobber::OnPaint(gfx::Canvas* canvas) {
if (running_) {
// Let the throbber throb...
Throbber::OnPaint(canvas);
return;
}
// Otherwise we paint our tick mark or nothing depending on our state.
if (checked_) {
int checkmark_x = (width() - checkmark_->width()) / 2;
int checkmark_y = (height() - checkmark_->height()) / 2;
canvas->DrawImageInt(*checkmark_, checkmark_x, checkmark_y);
}
}
} // namespace views
|
