ash/system/tray_accessibility.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 ASH_SYSTEM_TRAY_ACCESSIBILITY_H_
   6 #define ASH_SYSTEM_TRAY_ACCESSIBILITY_H_
   7
   8 #include "ash/accessibility_delegate.h"
   9 #include "ash/shell_observer.h"
  10 #include "ash/system/tray/tray_details_view.h"
  11 #include "ash/system/tray/tray_image_item.h"
  12 #include "ash/system/tray/view_click_listener.h"
  13 #include "base/gtest_prod_util.h"
  14 #include "ui/gfx/font.h"
  15 #include "ui/views/controls/button/button.h"
  16
  17 namespace chromeos {
  18 class TrayAccessibilityTest;
  19 }
  20
  21 namespace views {
  22 class Button;
  23 class ImageView;
  24 class View;
  25 }
  26
  27 namespace ash {
  28
  29 class SystemTrayItem;
  30
  31 class ASH_EXPORT AccessibilityObserver {
  32  public:
  33   virtual ~AccessibilityObserver() {}
  34
  35   // Notifies when accessibilty mode changes.
  36   virtual void OnAccessibilityModeChanged(
  37       AccessibilityNotificationVisibility notify) = 0;
  38 };
  39
  40 namespace internal {
  41
  42 class HoverHighlightView;
  43
  44 namespace tray {
  45
  46 class AccessibilityPopupView;
  47
  48 class AccessibilityDetailedView : public TrayDetailsView,
  49                                   public ViewClickListener,
  50                                   public views::ButtonListener,
  51                                   public ShellObserver {
  52  public:
  53   explicit AccessibilityDetailedView(SystemTrayItem* owner,
  54                                      user::LoginStatus login);
  55   virtual ~AccessibilityDetailedView() {}
  56
  57  private:
  58   // Add the accessibility feature list.
  59   void AppendAccessibilityList();
  60
  61   // Add help entries.
  62   void AppendHelpEntries();
  63
  64   HoverHighlightView* AddScrollListItem(const base::string16& text,
  65                                         gfx::Font::FontStyle style,
  66                                         bool checked);
  67   // Overridden from ViewClickListener.
  68   virtual void OnViewClicked(views::View* sender) OVERRIDE;
  69   // Overridden from ButtonListener.
  70   virtual void ButtonPressed(views::Button* sender,
  71                              const ui::Event& event) OVERRIDE;
  72
  73   views::View* spoken_feedback_view_;
  74   views::View* high_contrast_view_;
  75   views::View* screen_magnifier_view_;
  76   views::View* large_cursor_view_;
  77   views::View* help_view_;
  78   views::View* settings_view_;
  79   views::View* autoclick_view_;
  80   views::View* virtual_keyboard_view_;
  81
  82   bool spoken_feedback_enabled_;
  83   bool high_contrast_enabled_;
  84   bool screen_magnifier_enabled_;
  85   bool large_cursor_enabled_;
  86   bool autoclick_enabled_;
  87   bool virtual_keyboard_enabled_;
  88   user::LoginStatus login_;
  89
  90   friend class chromeos::TrayAccessibilityTest;
  91   DISALLOW_COPY_AND_ASSIGN(AccessibilityDetailedView);
  92 };
  93
  94 }  // namespace tray
  95
  96 class TrayAccessibility : public TrayImageItem,
  97                           public AccessibilityObserver {
  98  public:
  99   explicit TrayAccessibility(SystemTray* system_tray);
 100   virtual ~TrayAccessibility();
 101
 102  private:
 103   void SetTrayIconVisible(bool visible);
 104   tray::AccessibilityDetailedView* CreateDetailedMenu();
 105
 106   // Overridden from TrayImageItem.
 107   virtual bool GetInitialVisibility() OVERRIDE;
 108   virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
 109   virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE;
 110   virtual void DestroyDefaultView() OVERRIDE;
 111   virtual void DestroyDetailedView() OVERRIDE;
 112   virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE;
 113
 114   // Overridden from AccessibilityObserver.
 115   virtual void OnAccessibilityModeChanged(
 116       AccessibilityNotificationVisibility notify) OVERRIDE;
 117
 118   views::View* default_;
 119   tray::AccessibilityPopupView* detailed_popup_;
 120   tray::AccessibilityDetailedView* detailed_menu_;
 121
 122   bool request_popup_view_;
 123   bool tray_icon_visible_;
 124   user::LoginStatus login_;
 125
 126   // Bitmap of values from AccessibilityState enum.
 127   uint32 previous_accessibility_state_;
 128
 129   // A11y feature status on just entering the lock screen.
 130   bool show_a11y_menu_on_lock_screen_;
 131
 132   friend class chromeos::TrayAccessibilityTest;
 133   DISALLOW_COPY_AND_ASSIGN(TrayAccessibility);
 134 };
 135
 136 }  // namespace internal
 137 }  // namespace ash
 138
 139 #endif  // ASH_SYSTEM_TRAY_ACCESSIBILITY_H_