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#ifndef UI_VIEWS_CONTROLS_LINK_H_
6#define UI_VIEWS_CONTROLS_LINK_H_
7
8#include <string>
9
10#include "third_party/skia/include/core/SkColor.h"
11#include "ui/views/controls/label.h"
12
13namespace views {
14
15class LinkListener;
16
17////////////////////////////////////////////////////////////////////////////////
18//
19// Link class
20//
21// A Link is a label subclass that looks like an HTML link. It has a
22// controller which is notified when a click occurs.
23//
24////////////////////////////////////////////////////////////////////////////////
25class VIEWS_EXPORT Link : public Label {
26 public:
27  Link();
28  explicit Link(const base::string16& title);
29  virtual ~Link();
30
31  static SkColor GetDefaultEnabledColor();
32
33  const LinkListener* listener() { return listener_; }
34  void set_listener(LinkListener* listener) { listener_ = listener; }
35
36  // Label:
37  virtual const char* GetClassName() const OVERRIDE;
38  virtual gfx::NativeCursor GetCursor(const ui::MouseEvent& event) OVERRIDE;
39  virtual bool CanProcessEventsWithinSubtree() const OVERRIDE;
40  virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
41  virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE;
42  virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
43  virtual void OnMouseCaptureLost() OVERRIDE;
44  virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
45  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
46  virtual bool SkipDefaultKeyEventProcessing(
47      const ui::KeyEvent& event) OVERRIDE;
48  virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE;
49  virtual void OnEnabledChanged() OVERRIDE;
50  virtual void OnFocus() OVERRIDE;
51  virtual void OnBlur() OVERRIDE;
52  virtual void SetFontList(const gfx::FontList& font_list) OVERRIDE;
53  virtual void SetText(const base::string16& text) OVERRIDE;
54  virtual void SetEnabledColor(SkColor color) OVERRIDE;
55
56  void SetPressedColor(SkColor color);
57  void SetUnderline(bool underline);
58
59  static const char kViewClassName[];
60
61 private:
62  void Init();
63
64  void SetPressed(bool pressed);
65
66  void RecalculateFont();
67
68  LinkListener* listener_;
69
70  // Whether the link should be underlined when enabled.
71  bool underline_;
72
73  // Whether the link is currently pressed.
74  bool pressed_;
75
76  // The color when the link is neither pressed nor disabled.
77  SkColor requested_enabled_color_;
78
79  // The color when the link is pressed.
80  SkColor requested_pressed_color_;
81
82  DISALLOW_COPY_AND_ASSIGN(Link);
83};
84
85}  // namespace views
86
87#endif  // UI_VIEWS_CONTROLS_LINK_H_
88