1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "ui/views/examples/scroll_view_example.h"
6
7 #include "base/strings/stringprintf.h"
8 #include "base/strings/utf_string_conversions.h"
9 #include "ui/views/background.h"
10 #include "ui/views/controls/button/label_button.h"
11 #include "ui/views/controls/button/radio_button.h"
12 #include "ui/views/layout/grid_layout.h"
13 #include "ui/views/view.h"
14
15 using base::ASCIIToUTF16;
16
17 namespace views {
18 namespace examples {
19
20 // ScrollView's content, which draws gradient color on background.
21 // TODO(oshima): add child views as well.
22 class ScrollViewExample::ScrollableView : public View {
23 public:
ScrollableView()24 ScrollableView() {
25 SetColor(SK_ColorRED, SK_ColorCYAN);
26 AddChildView(new LabelButton(NULL, ASCIIToUTF16("Button")));
27 AddChildView(new RadioButton(ASCIIToUTF16("Radio Button"), 0));
28 }
29
GetPreferredSize() const30 virtual gfx::Size GetPreferredSize() const OVERRIDE {
31 return gfx::Size(width(), height());
32 }
33
SetColor(SkColor from,SkColor to)34 void SetColor(SkColor from, SkColor to) {
35 set_background(Background::CreateVerticalGradientBackground(from, to));
36 }
37
PlaceChildY(int index,int y)38 void PlaceChildY(int index, int y) {
39 View* view = child_at(index);
40 gfx::Size size = view->GetPreferredSize();
41 view->SetBounds(0, y, size.width(), size.height());
42 }
43
Layout()44 virtual void Layout() OVERRIDE {
45 PlaceChildY(0, 0);
46 PlaceChildY(1, height() / 2);
47 SizeToPreferredSize();
48 }
49
50 private:
51 DISALLOW_COPY_AND_ASSIGN(ScrollableView);
52 };
53
ScrollViewExample()54 ScrollViewExample::ScrollViewExample() : ExampleBase("Scroll View") {
55 }
56
~ScrollViewExample()57 ScrollViewExample::~ScrollViewExample() {
58 }
59
CreateExampleView(View * container)60 void ScrollViewExample::CreateExampleView(View* container) {
61 wide_ = new LabelButton(this, ASCIIToUTF16("Wide"));
62 tall_ = new LabelButton(this, ASCIIToUTF16("Tall"));
63 big_square_ = new LabelButton(this, ASCIIToUTF16("Big Square"));
64 small_square_ = new LabelButton(this, ASCIIToUTF16("Small Square"));
65 scroll_to_ = new LabelButton(this, ASCIIToUTF16("Scroll to"));
66 scrollable_ = new ScrollableView();
67 scroll_view_ = new ScrollView();
68 scroll_view_->SetContents(scrollable_);
69 scrollable_->SetBounds(0, 0, 1000, 100);
70 scrollable_->SetColor(SK_ColorYELLOW, SK_ColorCYAN);
71
72 GridLayout* layout = new GridLayout(container);
73 container->SetLayoutManager(layout);
74
75 // Add scroll view.
76 ColumnSet* column_set = layout->AddColumnSet(0);
77 column_set->AddColumn(GridLayout::FILL, GridLayout::FILL, 1,
78 GridLayout::USE_PREF, 0, 0);
79 layout->StartRow(1, 0);
80 layout->AddView(scroll_view_);
81
82 // Add control buttons.
83 column_set = layout->AddColumnSet(1);
84 for (int i = 0; i < 5; i++) {
85 column_set->AddColumn(GridLayout::FILL, GridLayout::FILL, 1,
86 GridLayout::USE_PREF, 0, 0);
87 }
88 layout->StartRow(0, 1);
89 layout->AddView(wide_);
90 layout->AddView(tall_);
91 layout->AddView(big_square_);
92 layout->AddView(small_square_);
93 layout->AddView(scroll_to_);
94 }
95
ButtonPressed(Button * sender,const ui::Event & event)96 void ScrollViewExample::ButtonPressed(Button* sender, const ui::Event& event) {
97 if (sender == wide_) {
98 scrollable_->SetBounds(0, 0, 1000, 100);
99 scrollable_->SetColor(SK_ColorYELLOW, SK_ColorCYAN);
100 } else if (sender == tall_) {
101 scrollable_->SetBounds(0, 0, 100, 1000);
102 scrollable_->SetColor(SK_ColorRED, SK_ColorCYAN);
103 } else if (sender == big_square_) {
104 scrollable_->SetBounds(0, 0, 1000, 1000);
105 scrollable_->SetColor(SK_ColorRED, SK_ColorGREEN);
106 } else if (sender == small_square_) {
107 scrollable_->SetBounds(0, 0, 100, 100);
108 scrollable_->SetColor(SK_ColorYELLOW, SK_ColorGREEN);
109 } else if (sender == scroll_to_) {
110 scroll_view_->contents()->ScrollRectToVisible(
111 gfx::Rect(20, 500, 1000, 500));
112 }
113 scroll_view_->Layout();
114 }
115
116 } // namespace examples
117 } // namespace views
118