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
|
// 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/app_list/page_switcher.h"
#include "third_party/skia/include/core/SkPath.h"
#include "ui/app_list/pagination_model.h"
#include "ui/base/animation/throb_animation.h"
#include "ui/gfx/canvas.h"
#include "ui/views/controls/button/custom_button.h"
#include "ui/views/layout/box_layout.h"
namespace {
const int kButtonSpacing = 10;
const int kButtonWidth = 60;
const int kButtonHeight = 6;
const int kButtonHeightPadding = 10;
const int kButtonCornerRadius = 2;
// 0.16 black
const SkColor kHoverColor = SkColorSetARGB(0x2A, 0x00, 0x00, 0x00);
// 0.2 black
const SkColor kNormalColor = SkColorSetARGB(0x33, 0x00, 0x00, 0x00);
// 0.33 black
const SkColor kSelectedColor = SkColorSetARGB(0x55, 0x00, 0x00, 0x00);
class PageSwitcherButton : public views::CustomButton {
public:
explicit PageSwitcherButton(views::ButtonListener* listener)
: views::CustomButton(listener),
selected_(false) {
}
virtual ~PageSwitcherButton() {}
void SetSelected(bool selected) {
if (selected == selected_)
return;
selected_ = selected;
SchedulePaint();
}
// Overridden from views::View:
virtual gfx::Size GetPreferredSize() OVERRIDE {
return gfx::Size(kButtonWidth, kButtonHeight + kButtonHeightPadding);
}
virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
if (selected_ || state() == BS_PUSHED) {
PaintButton(canvas, kSelectedColor);
} else if (state() == BS_HOT) {
PaintButton(canvas, kHoverColor);
} else {
PaintButton(canvas, kNormalColor);
}
}
private:
// Paints a button that has two rounded corner at bottom.
void PaintButton(gfx::Canvas* canvas, SkColor color) {
gfx::Rect rect(GetContentsBounds());
rect.set_height(kButtonHeight);
gfx::Point center = rect.CenterPoint();
SkPath path;
path.incReserve(12);
path.moveTo(SkIntToScalar(rect.x()), SkIntToScalar(rect.y()));
path.arcTo(SkIntToScalar(rect.x()), SkIntToScalar(rect.bottom()),
SkIntToScalar(center.x()), SkIntToScalar(rect.bottom()),
SkIntToScalar(kButtonCornerRadius));
path.arcTo(SkIntToScalar(rect.right()), SkIntToScalar(rect.bottom()),
SkIntToScalar(rect.right()), SkIntToScalar(rect.y()),
SkIntToScalar(kButtonCornerRadius));
path.lineTo(SkIntToScalar(rect.right()), SkIntToScalar(rect.y()));
path.close();
SkPaint paint;
paint.setStyle(SkPaint::kFill_Style);
paint.setColor(color);
canvas->DrawPath(path, paint);
}
bool selected_;
DISALLOW_COPY_AND_ASSIGN(PageSwitcherButton);
};
// Gets PageSwitcherButton at |index| in |buttons|.
PageSwitcherButton* GetButtonByIndex(views::View* buttons, int index) {
return static_cast<PageSwitcherButton*>(buttons->child_at(index));
}
} // namespace
namespace app_list {
PageSwitcher::PageSwitcher(PaginationModel* model)
: model_(model),
buttons_(NULL) {
buttons_ = new views::View;
buttons_->SetLayoutManager(new views::BoxLayout(
views::BoxLayout::kHorizontal, 0, 0, kButtonSpacing));
AddChildView(buttons_);
TotalPagesChanged();
SelectedPageChanged(-1, model->selected_page());
model_->AddObserver(this);
}
PageSwitcher::~PageSwitcher() {
model_->RemoveObserver(this);
}
gfx::Size PageSwitcher::GetPreferredSize() {
// Always return a size with correct height so that container resize is not
// needed when more pages are added.
return gfx::Size(kButtonWidth, kButtonHeight + kButtonHeightPadding);
}
void PageSwitcher::Layout() {
gfx::Rect rect(GetContentsBounds());
buttons_->SetBoundsRect(rect.Center(buttons_->GetPreferredSize()));
}
void PageSwitcher::ButtonPressed(views::Button* sender,
const views::Event& event) {
for (int i = 0; i < buttons_->child_count(); ++i) {
if (sender == static_cast<views::Button*>(buttons_->child_at(i))) {
model_->SelectPage(i);
break;
}
}
}
void PageSwitcher::TotalPagesChanged() {
buttons_->RemoveAllChildViews(true);
for (int i = 0; i < model_->total_pages(); ++i) {
PageSwitcherButton* button = new PageSwitcherButton(this);
button->SetSelected(i == model_->selected_page());
buttons_->AddChildView(button);
}
buttons_->SetVisible(model_->total_pages() > 1);
Layout();
}
void PageSwitcher::SelectedPageChanged(int old_selected, int new_selected) {
if (old_selected >= 0 && old_selected < buttons_->child_count())
GetButtonByIndex(buttons_, old_selected)->SetSelected(false);
if (new_selected >= 0 && new_selected < buttons_->child_count())
GetButtonByIndex(buttons_, new_selected)->SetSelected(true);
}
} // namespace app_list
|
