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 accessibility mode changes.
  38   virtual void OnAccessibilityModeChanged(
  39       ui::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   ~AccessibilityDetailedView() override {}
  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   void OnViewClicked(views::View* sender) override;
  80   // Overridden from ButtonListener.
  81   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
  82
  83   views::View* spoken_feedback_view_;
  84   views::View* high_contrast_view_;
  85   views::View* screen_magnifier_view_;
  86   views::View* large_cursor_view_;
  87   views::View* help_view_;
  88   views::View* settings_view_;
  89   views::View* autoclick_view_;
  90   views::View* virtual_keyboard_view_;
  91
  92   bool spoken_feedback_enabled_;
  93   bool high_contrast_enabled_;
  94   bool screen_magnifier_enabled_;
  95   bool large_cursor_enabled_;
  96   bool autoclick_enabled_;
  97   bool virtual_keyboard_enabled_;
  98   user::LoginStatus login_;
  99
 100   friend class chromeos::TrayAccessibilityTest;
 101   DISALLOW_COPY_AND_ASSIGN(AccessibilityDetailedView);
 102 };
 103
 104 }  // namespace tray
 105
 106 class TrayAccessibility : public TrayImageItem,
 107                           public AccessibilityObserver {
 108  public:
 109   explicit TrayAccessibility(SystemTray* system_tray);
 110   ~TrayAccessibility() override;
 111
 112  private:
 113   void SetTrayIconVisible(bool visible);
 114   tray::AccessibilityDetailedView* CreateDetailedMenu();
 115
 116   // Overridden from TrayImageItem.
 117   bool GetInitialVisibility() override;
 118   views::View* CreateDefaultView(user::LoginStatus status) override;
 119   views::View* CreateDetailedView(user::LoginStatus status) override;
 120   void DestroyDefaultView() override;
 121   void DestroyDetailedView() override;
 122   void UpdateAfterLoginStatusChange(user::LoginStatus status) override;
 123
 124   // Overridden from AccessibilityObserver.
 125   void OnAccessibilityModeChanged(
 126       ui::AccessibilityNotificationVisibility notify) override;
 127
 128   views::View* default_;
 129   tray::AccessibilityPopupView* detailed_popup_;
 130   tray::AccessibilityDetailedView* detailed_menu_;
 131
 132   // Bitmap of fvalues from AccessibilityState.  Can contain any or
 133   // both of A11Y_SPOKEN_FEEDBACK A11Y_BRAILLE_DISPLAY_CONNECTED.
 134   uint32 request_popup_view_state_;
 135
 136   bool tray_icon_visible_;
 137   user::LoginStatus login_;
 138
 139   // Bitmap of values from AccessibilityState enum.
 140   uint32 previous_accessibility_state_;
 141
 142   // A11y feature status on just entering the lock screen.
 143   bool show_a11y_menu_on_lock_screen_;
 144
 145   friend class chromeos::TrayAccessibilityTest;
 146   DISALLOW_COPY_AND_ASSIGN(TrayAccessibility);
 147 };
 148
 149 }  // namespace ash
 150
 151 #endif  // ASH_SYSTEM_TRAY_ACCESSIBILITY_H_