ui/views/controls/link.h

   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
  13 namespace views {
  14
  15 class 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 ////////////////////////////////////////////////////////////////////////////////
  25 class 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_