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   ~Link() override;
  30
  31   const LinkListener* listener() { return listener_; }
  32   void set_listener(LinkListener* listener) { listener_ = listener; }
  33
  34   // Label:
  35   const char* GetClassName() const override;
  36   gfx::NativeCursor GetCursor(const ui::MouseEvent& event) override;
  37   bool CanProcessEventsWithinSubtree() const override;
  38   bool OnMousePressed(const ui::MouseEvent& event) override;
  39   bool OnMouseDragged(const ui::MouseEvent& event) override;
  40   void OnMouseReleased(const ui::MouseEvent& event) override;
  41   void OnMouseCaptureLost() override;
  42   bool OnKeyPressed(const ui::KeyEvent& event) override;
  43   void OnGestureEvent(ui::GestureEvent* event) override;
  44   bool SkipDefaultKeyEventProcessing(const ui::KeyEvent& event) override;
  45   void GetAccessibleState(ui::AXViewState* state) override;
  46   void OnEnabledChanged() override;
  47   void OnFocus() override;
  48   void OnBlur() override;
  49   void SetFontList(const gfx::FontList& font_list) override;
  50   void SetText(const base::string16& text) override;
  51   void OnNativeThemeChanged(const ui::NativeTheme* theme) override;
  52   void SetEnabledColor(SkColor color) override;
  53
  54   void SetPressedColor(SkColor color);
  55   void SetUnderline(bool underline);
  56
  57   static const char kViewClassName[];
  58
  59  private:
  60   void Init();
  61
  62   void SetPressed(bool pressed);
  63
  64   void RecalculateFont();
  65
  66   SkColor GetEnabledColor();
  67   SkColor GetPressedColor();
  68
  69   LinkListener* listener_;
  70
  71   // Whether the link should be underlined when enabled.
  72   bool underline_;
  73
  74   // Whether the link is currently pressed.
  75   bool pressed_;
  76
  77   // The color when the link is neither pressed nor disabled.
  78   SkColor requested_enabled_color_;
  79   bool requested_enabled_color_set_;
  80
  81   // The color when the link is pressed.
  82   SkColor requested_pressed_color_;
  83   bool requested_pressed_color_set_;
  84
  85   DISALLOW_COPY_AND_ASSIGN(Link);
  86 };
  87
  88 }  // namespace views
  89
  90 #endif  // UI_VIEWS_CONTROLS_LINK_H_