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
|
// Copyright (c) 2009 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 VIEWS_EXAMPLES_SCROLL_BAR_EXAMPLE_H_
#define VIEWS_EXAMPLES_SCROLL_BAR_EXAMPLE_H_
#include "base/compiler_specific.h"
#include "base/string_util.h"
#include "views/controls/button/radio_button.h"
#include "views/controls/button/text_button.h"
#include "views/controls/scroll_view.h"
#include "views/examples/example_base.h"
namespace examples {
class ScrollViewExample : public ExampleBase,
public views::ButtonListener {
public:
explicit ScrollViewExample(ExamplesMain* main): ExampleBase(main) {}
virtual ~ScrollViewExample() {}
virtual std::wstring GetExampleTitle() {
return L"Scroll View";
}
virtual void CreateExampleView(views::View* container) {
wide_ = new views::TextButton(this, L"Wide");
tall_ = new views::TextButton(this, L"Tall");
big_square_ = new views::TextButton(this, L"Big Square");
small_square_ = new views::TextButton(this, L"Small Square");
scroll_to_ = new views::TextButton(this, L"Scroll to");
scrollable_ = new ScrollableView();
scroll_view_ = new views::ScrollView();
scroll_view_->SetContents(scrollable_);
scrollable_->SetBounds(0, 0, 1000, 100);
scrollable_->SetColor(SK_ColorYELLOW, SK_ColorCYAN);
views::GridLayout* layout = new views::GridLayout(container);
container->SetLayoutManager(layout);
// Add scroll view.
views::ColumnSet* column_set = layout->AddColumnSet(0);
column_set->AddColumn(views::GridLayout::FILL, views::GridLayout::FILL, 1,
views::GridLayout::USE_PREF, 0, 0);
layout->StartRow(1, 0);
layout->AddView(scroll_view_);
// Add control buttons.
column_set = layout->AddColumnSet(1);
for (int i = 0; i < 5; i++) {
column_set->AddColumn(views::GridLayout::FILL, views::GridLayout::FILL, 1,
views::GridLayout::USE_PREF, 0, 0);
}
layout->StartRow(0, 1);
layout->AddView(wide_);
layout->AddView(tall_);
layout->AddView(big_square_);
layout->AddView(small_square_);
layout->AddView(scroll_to_);
}
private:
// ScrollView's content, which draws gradient color on background.
// TODO(oshima): add child views as well.
class ScrollableView : public views::View {
public:
ScrollableView() {
SetColor(SK_ColorRED, SK_ColorCYAN);
AddChildView(new views::TextButton(NULL, L"Button"));
AddChildView(new views::RadioButton(L"Radio Button", 0));
}
virtual gfx::Size GetPreferredSize() {
return gfx::Size(width(), height());
}
void SetColor(SkColor from, SkColor to) {
set_background(
views::Background::CreateVerticalGradientBackground(from, to));
}
void PlaceChildY(int index, int y) {
views::View* view = GetChildViewAt(index);
gfx::Size size = view->GetPreferredSize();
view->SetBounds(0, y, size.width(), size.height());
}
virtual void Layout() {
PlaceChildY(0, 0);
PlaceChildY(1, height() / 2);
SizeToPreferredSize();
}
private:
DISALLOW_COPY_AND_ASSIGN(ScrollableView);
};
// ButtonListner implementation.
virtual void ButtonPressed(views::Button* sender, const views::Event& event) {
if (sender == wide_) {
scrollable_->SetBounds(0, 0, 1000, 100);
scrollable_->SetColor(SK_ColorYELLOW, SK_ColorCYAN);
} else if (sender == tall_) {
scrollable_->SetBounds(0, 0, 100, 1000);
scrollable_->SetColor(SK_ColorRED, SK_ColorCYAN);
} else if (sender == big_square_) {
scrollable_->SetBounds(0, 0, 1000, 1000);
scrollable_->SetColor(SK_ColorRED, SK_ColorGREEN);
} else if (sender == small_square_) {
scrollable_->SetBounds(0, 0, 100, 100);
scrollable_->SetColor(SK_ColorYELLOW, SK_ColorGREEN);
} else if (sender == scroll_to_) {
scroll_view_->ScrollContentsRegionToBeVisible(
gfx::Rect(20, 500, 1000, 500));
}
scroll_view_->Layout();
}
// Control buttons to change the size of scrollable and jump to
// predefined position.
views::TextButton* wide_, *tall_, *big_square_, *small_square_, *scroll_to_;
// The content of the scroll view.
ScrollableView* scrollable_;
// The scroll view to test.
views::ScrollView* scroll_view_;
DISALLOW_COPY_AND_ASSIGN(ScrollViewExample);
};
} // namespace examples
#endif // VIEWS_EXAMPLES_SCROLL_BAR_EXAMPLE_H_
|
