multiline_example.cc revision eb525c5499e34cc9c4b825d6d9e75bb07cc06ace 
1// Copyright 2013 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/multiline_example.h"
6
7#include "base/strings/utf_string_conversions.h"
8#include "ui/base/events/event.h"
9#include "ui/gfx/render_text.h"
10#include "ui/views/controls/label.h"
11#include "ui/views/controls/textfield/textfield.h"
12#include "ui/views/layout/grid_layout.h"
13#include "ui/views/view.h"
14
15namespace views {
16namespace examples {
17
18// A simple View that hosts a RenderText object.
19class MultilineExample::RenderTextView : public View {
20 public:
21  explicit RenderTextView(gfx::RenderText* render_text)
22      : render_text_(render_text) {
23    render_text_->SetColor(SK_ColorBLACK);
24    set_border(Border::CreateSolidBorder(2, SK_ColorGRAY));
25  }
26
27  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
28    View::OnPaint(canvas);
29    render_text_->Draw(canvas);
30  }
31
32  virtual gfx::Size GetPreferredSize() OVERRIDE {
33    return gfx::Size(0,
34        render_text_->GetFont().GetHeight() + GetInsets().height());
35  }
36
37  void SetText(const string16& new_contents) {
38    render_text_->SetText(new_contents);
39    SchedulePaint();
40  }
41
42 private:
43  virtual void OnBoundsChanged(const gfx::Rect& previous_bounds) OVERRIDE {
44    gfx::Rect bounds = GetLocalBounds();
45    bounds.Inset(GetInsets());
46    render_text_->SetDisplayRect(bounds);
47  }
48
49  scoped_ptr<gfx::RenderText> render_text_;
50
51  DISALLOW_COPY_AND_ASSIGN(RenderTextView);
52};
53
54MultilineExample::MultilineExample()
55    : ExampleBase("Multiline RenderText"),
56      render_text_view_(NULL),
57      label_(NULL),
58      textfield_(NULL) {
59}
60
61MultilineExample::~MultilineExample() {
62}
63
64void MultilineExample::CreateExampleView(View* container) {
65  const char kTestString[] = "test string asdf 1234 test string asdf 1234 "
66                             "test string asdf 1234 test string asdf 1234";
67
68  gfx::RenderText* render_text = gfx::RenderText::CreateInstance();
69  render_text->SetText(ASCIIToUTF16(kTestString));
70  render_text->SetHorizontalAlignment(gfx::ALIGN_CENTER);
71
72  render_text_view_ = new RenderTextView(render_text);
73
74  label_ = new Label();
75  label_->SetText(ASCIIToUTF16(kTestString));
76  label_->SetMultiLine(true);
77  label_->set_border(Border::CreateSolidBorder(2, SK_ColorCYAN));
78
79  textfield_ = new Textfield();
80  textfield_->SetController(this);
81  textfield_->SetText(ASCIIToUTF16(kTestString));
82
83  GridLayout* layout = new GridLayout(container);
84  container->SetLayoutManager(layout);
85
86  ColumnSet* column_set = layout->AddColumnSet(0);
87  column_set->AddColumn(GridLayout::LEADING, GridLayout::FILL,
88      0.0f, GridLayout::USE_PREF, 0, 0);
89  column_set->AddColumn(GridLayout::FILL, GridLayout::FILL,
90      1.0f, GridLayout::FIXED, 0, 0);
91
92  layout->StartRow(0, 0);
93  layout->AddView(new Label(ASCIIToUTF16("gfx::RenderText:")));
94  layout->AddView(render_text_view_);
95
96  layout->StartRow(0, 0);
97  layout->AddView(new Label(ASCIIToUTF16("views::Label:")));
98  layout->AddView(label_);
99
100  layout->StartRow(0, 0);
101  layout->AddView(new Label(ASCIIToUTF16("Sample Text:")));
102  layout->AddView(textfield_);
103}
104
105void MultilineExample::ContentsChanged(Textfield* sender,
106                                       const string16& new_contents) {
107  render_text_view_->SetText(new_contents);
108  label_->SetText(new_contents);
109}
110
111bool MultilineExample::HandleKeyEvent(Textfield* sender,
112                                      const ui::KeyEvent& key_event) {
113  return false;
114}
115
116}  // namespace examples
117}  // namespace views
118