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/tray_notification_view.h"
  13 #include "ash/system/tray/view_click_listener.h"
  14 #include "base/gtest_prod_util.h"
  15 #include "ui/gfx/font.h"
  16 #include "ui/views/controls/button/button.h"
  17
  18 namespace chromeos {
  19 class TrayAccessibilityTest;
  20 }
  21
  22 namespace views {
  23 class Button;
  24 class ImageView;
  25 class Label;
  26 class View;
  27 }
  28
  29 namespace ash {
  30 class HoverHighlightView;
  31 class SystemTrayItem;
  32
  33 class ASH_EXPORT AccessibilityObserver {
  34  public:
  35   virtual ~AccessibilityObserver() {}
  36
  37   // Notifies when accessibilty mode changes.
  38   virtual void OnAccessibilityModeChanged(
  39       AccessibilityNotificationVisibility notify) = 0;
  40 };
  41
  42
  43 namespace tray {
  44
  45 class AccessibilityPopupView : public TrayNotificationView {
  46  public:
  47   AccessibilityPopupView(SystemTrayItem* owner, uint32 enabled_state_bits);
  48
  49   const views::Label* label_for_test() const { return label_; }
  50
  51  private:
  52   views::Label* CreateLabel(uint32 enabled_state_bits);
  53
  54   views::Label* label_;
  55
  56   DISALLOW_COPY_AND_ASSIGN(AccessibilityPopupView);
  57 };
  58
  59 class AccessibilityDetailedView : public TrayDetailsView,
  60                                   public ViewClickListener,
  61                                   public views::ButtonListener,
  62                                   public ShellObserver {
  63  public:
  64   explicit AccessibilityDetailedView(SystemTrayItem* owner,
  65                                      user::LoginStatus login);
  66   virtual ~AccessibilityDetailedView() {}
  67
  68  private:
  69   // Add the accessibility feature list.
  70   void AppendAccessibilityList();
  71
  72   // Add help entries.
  73   void AppendHelpEntries();
  74
  75   HoverHighlightView* AddScrollListItem(const base::string16& text,
  76                                         gfx::Font::FontStyle style,
  77                                         bool checked);
  78   // Overridden from ViewClickListener.
  79   virtual void OnViewClicked(views::View* sender) OVERRIDE;
  80   // Overridden from ButtonListener.
  81   virtual void ButtonPressed(views::Button* sender,
  82                              const ui::Event& event) OVERRIDE;
  83
  84   views::View* spoken_feedback_view_;
  85   views::View* high_contrast_view_;
  86   views::View* screen_magnifier_view_;
  87   views::View* large_cursor_view_;
  88   views::View* help_view_;
  89   views::View* settings_view_;
  90   views::View* autoclick_view_;
  91   views::View* virtual_keyboard_view_;
  92
  93   bool spoken_feedback_enabled_;
  94   bool high_contrast_enabled_;
  95   bool screen_magnifier_enabled_;
  96   bool large_cursor_enabled_;
  97   bool autoclick_enabled_;
  98   bool virtual_keyboard_enabled_;
  99   user::LoginStatus login_;
 100
 101   friend class chromeos::TrayAccessibilityTest;
 102   DISALLOW_COPY_AND_ASSIGN(AccessibilityDetailedView);
 103 };
 104
 105 }  // namespace tray
 106
 107 class TrayAccessibility : public TrayImageItem,
 108                           public AccessibilityObserver {
 109  public:
 110   explicit TrayAccessibility(SystemTray* system_tray);
 111   virtual ~TrayAccessibility();
 112
 113  private:
 114   void SetTrayIconVisible(bool visible);
 115   tray::AccessibilityDetailedView* CreateDetailedMenu();
 116
 117   // Overridden from TrayImageItem.
 118   virtual bool GetInitialVisibility() OVERRIDE;
 119   virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
 120   virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE;
 121   virtual void DestroyDefaultView() OVERRIDE;
 122   virtual void DestroyDetailedView() OVERRIDE;
 123   virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE;
 124
 125   // Overridden from AccessibilityObserver.
 126   virtual void OnAccessibilityModeChanged(
 127       AccessibilityNotificationVisibility notify) OVERRIDE;
 128
 129   views::View* default_;
 130   tray::AccessibilityPopupView* detailed_popup_;
 131   tray::AccessibilityDetailedView* detailed_menu_;
 132
 133   // Bitmap of fvalues from AccessibilityState.  Can contain any or
 134   // both of A11Y_SPOKEN_FEEDBACK A11Y_BRAILLE_DISPLAY_CONNECTED.
 135   uint32 request_popup_view_state_;
 136
 137   bool tray_icon_visible_;
 138   user::LoginStatus login_;
 139
 140   // Bitmap of values from AccessibilityState enum.
 141   uint32 previous_accessibility_state_;
 142
 143   // A11y feature status on just entering the lock screen.
 144   bool show_a11y_menu_on_lock_screen_;
 145
 146   friend class chromeos::TrayAccessibilityTest;
 147   DISALLOW_COPY_AND_ASSIGN(TrayAccessibility);
 148 };
 149
 150 }  // namespace ash
 151
 152 #endif  // ASH_SYSTEM_TRAY_ACCESSIBILITY_H_