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
15namespace {
16
17const double kStepSize = 0.1;
18
19double SetToMax(double percent) {
20  return std::min(std::max(percent, 0.0), 1.0);
21}
22
23}  // namespace
24
25namespace views {
26namespace examples {
27
28ProgressBarExample::ProgressBarExample()
29    : ExampleBase("Progress Bar"),
30      minus_button_(NULL),
31      plus_button_(NULL),
32      progress_bar_(NULL),
33      current_percent_(0.0) {
34}
35
36ProgressBarExample::~ProgressBarExample() {
37}
38
39void 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
62void 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