A11y setting: mono audio UI

ash/system/tray_accessibility.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/system/tray_accessibility.h"
 
 #include "ash/accessibility_delegate.h"
 #include "ash/metrics/user_metrics_recorder.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
@@ skipping 21 matching lines @@
 
 enum AccessibilityState {
   A11Y_NONE = 0,
   A11Y_SPOKEN_FEEDBACK = 1 << 0,
   A11Y_HIGH_CONTRAST = 1 << 1,
   A11Y_SCREEN_MAGNIFIER = 1 << 2,
   A11Y_LARGE_CURSOR = 1 << 3,
   A11Y_AUTOCLICK = 1 << 4,
   A11Y_VIRTUAL_KEYBOARD = 1 << 5,
   A11Y_BRAILLE_DISPLAY_CONNECTED = 1 << 6,
+  A11Y_MONO_AUDIO = 1 << 7,
 };
 
 uint32_t GetAccessibilityState() {
   AccessibilityDelegate* delegate =
       Shell::GetInstance()->accessibility_delegate();
   uint32_t state = A11Y_NONE;
   if (delegate->IsSpokenFeedbackEnabled())
     state |= A11Y_SPOKEN_FEEDBACK;
   if (delegate->IsHighContrastEnabled())
     state |= A11Y_HIGH_CONTRAST;
   if (delegate->IsMagnifierEnabled())
     state |= A11Y_SCREEN_MAGNIFIER;
   if (delegate->IsLargeCursorEnabled())
     state |= A11Y_LARGE_CURSOR;
   if (delegate->IsAutoclickEnabled())
     state |= A11Y_AUTOCLICK;
   if (delegate->IsVirtualKeyboardEnabled())
     state |= A11Y_VIRTUAL_KEYBOARD;
   if (delegate->IsBrailleDisplayConnected())
     state |= A11Y_BRAILLE_DISPLAY_CONNECTED;
+  if (delegate->IsMonoAudioEnabled())
+    state |= A11Y_MONO_AUDIO;
   return state;
 }
 
 user::LoginStatus GetCurrentLoginStatus() {
   return Shell::GetInstance()->system_tray_delegate()->GetUserLoginStatus();
 }
 
 }  // namespace
 
 namespace tray {
@@ skipping 55 matching lines @@
     SystemTrayItem* owner, user::LoginStatus login) :
         TrayDetailsView(owner),
         spoken_feedback_view_(NULL),
         high_contrast_view_(NULL),
         screen_magnifier_view_(NULL),
         large_cursor_view_(NULL),
         help_view_(NULL),
         settings_view_(NULL),
         autoclick_view_(NULL),
         virtual_keyboard_view_(NULL),
+        mono_audio_view_(NULL),
         spoken_feedback_enabled_(false),
         high_contrast_enabled_(false),
         screen_magnifier_enabled_(false),
         large_cursor_enabled_(false),
         autoclick_enabled_(false),
         virtual_keyboard_enabled_(false),
+        mono_audio_enabled_(false),

[oshima, 2016/04/11 17:05:30]

is this used?

[Qiang(Joe) Xu, 2016/04/11 20:59:09]

Not used. It is now updated, deleting both mono_audio_view_ and
mono_audio_enabled_. This makes not showing a11y hand icon in tray when enabling
mono audio.

         login_(login) {
 
   Reset();
 
   AppendAccessibilityList();
   AppendHelpEntries();
   CreateSpecialRow(IDS_ASH_STATUS_TRAY_ACCESSIBILITY_TITLE, this);
 
   Layout();
 }
@@ skipping 128 matching lines @@
         delegate->IsAutoclickEnabled() ?
             ash::UMA_STATUS_AREA_DISABLE_AUTO_CLICK :
             ash::UMA_STATUS_AREA_ENABLE_AUTO_CLICK);
     delegate->SetAutoclickEnabled(!delegate->IsAutoclickEnabled());
   } else if (virtual_keyboard_view_ && sender == virtual_keyboard_view_) {
     Shell::GetInstance()->metrics()->RecordUserMetricsAction(
         delegate->IsVirtualKeyboardEnabled() ?
             ash::UMA_STATUS_AREA_DISABLE_VIRTUAL_KEYBOARD :
             ash::UMA_STATUS_AREA_ENABLE_VIRTUAL_KEYBOARD);
     delegate->SetVirtualKeyboardEnabled(!delegate->IsVirtualKeyboardEnabled());
+  } else if (mono_audio_view_ && sender == mono_audio_view_) {
+    Shell::GetInstance()->metrics()->RecordUserMetricsAction(
+        delegate->IsMonoAudioEnabled() ?
+            ash::UMA_STATUS_AREA_DISABLE_MONO_AUDIO :
+            ash::UMA_STATUS_AREA_ENABLE_MONO_AUDIO);
+    delegate->SetMonoAudioEnabled(!delegate->IsMonoAudioEnabled());
   }
 }
 
 void AccessibilityDetailedView::ButtonPressed(views::Button* sender,
                                               const ui::Event& event) {
   SystemTrayDelegate* tray_delegate =
       Shell::GetInstance()->system_tray_delegate();
   if (sender == help_view_)
     tray_delegate->ShowAccessibilityHelp();
   else if (sender == settings_view_)
@@ skipping 123 matching lines @@
     if (detailed_popup_)
       detailed_popup_->GetWidget()->Close();
     if (detailed_menu_)
       detailed_menu_->GetWidget()->Close();
   }
 
   previous_accessibility_state_ = accessibility_state;
 }
 
 }  // namespace ash