1 // Copyright (c) 2012 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/progress_bar_example.h"
6
7 #include <algorithm>
8
9 #include "base/strings/utf_string_conversions.h"
10 #include "ui/views/controls/button/label_button.h"
11 #include "ui/views/controls/progress_bar.h"
12 #include "ui/views/layout/grid_layout.h"
13 #include "ui/views/view.h"
14
15 namespace {
16
17 const double kStepSize = 0.1;
18
SetToMax(double percent)19 double SetToMax(double percent) {
20 return std::min(std::max(percent, 0.0), 1.0);
21 }
22
23 } // namespace
24
25 namespace views {
26 namespace examples {
27
ProgressBarExample()28 ProgressBarExample::ProgressBarExample()
29 : ExampleBase("Progress Bar"),
30 minus_button_(NULL),
31 plus_button_(NULL),
32 progress_bar_(NULL),
33 current_percent_(0.0) {
34 }
35
~ProgressBarExample()36 ProgressBarExample::~ProgressBarExample() {
37 }
38
CreateExampleView(View * container)39 void ProgressBarExample::CreateExampleView(View* container) {
40 GridLayout* layout = new GridLayout(container);
41 container->SetLayoutManager(layout);
42
43 ColumnSet* column_set = layout->AddColumnSet(0);
44 column_set->AddColumn(GridLayout::LEADING, GridLayout::FILL,
45 0, GridLayout::USE_PREF, 0, 0);
46 column_set->AddPaddingColumn(0, 8);
47 column_set->AddColumn(GridLayout::FILL, GridLayout::FILL,
48 1, GridLayout::USE_PREF, 0, 0);
49 column_set->AddPaddingColumn(0, 8);
50 column_set->AddColumn(GridLayout::TRAILING, GridLayout::FILL,
51 0, GridLayout::USE_PREF, 0, 0);
52
53 layout->StartRow(0, 0);
54 minus_button_ = new LabelButton(this, base::ASCIIToUTF16("-"));
55 layout->AddView(minus_button_);
56 progress_bar_ = new ProgressBar();
57 layout->AddView(progress_bar_);
58 plus_button_ = new LabelButton(this, base::ASCIIToUTF16("+"));
59 layout->AddView(plus_button_);
60 }
61
ButtonPressed(Button * sender,const ui::Event & event)62 void ProgressBarExample::ButtonPressed(Button* sender, const ui::Event& event) {
63 if (sender == minus_button_)
64 current_percent_ = SetToMax(current_percent_ - kStepSize);
65 else if (sender == plus_button_)
66 current_percent_ = SetToMax(current_percent_ + kStepSize);
67
68 progress_bar_->SetValue(current_percent_);
69 }
70
71 } // namespace examples
72 } // namespace views
73