ash/high_contrast/high_contrast_controller.cc

   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 #include "ash/high_contrast/high_contrast_controller.h"
   6
   7 #include "ash/shell.h"
   8 #include "ui/aura/window_event_dispatcher.h"
   9 #include "ui/compositor/layer.h"
  10
  11 namespace ash {
  12
  13 HighContrastController::HighContrastController()
  14     : enabled_(false) {
  15   Shell::GetInstance()->AddShellObserver(this);
  16 }
  17
  18 HighContrastController::~HighContrastController() {
  19   Shell::GetInstance()->RemoveShellObserver(this);
  20 }
  21
  22 void HighContrastController::SetEnabled(bool enabled) {
  23   enabled_ = enabled;
  24
  25   // Update all active displays.
  26   aura::Window::Windows root_window_list = Shell::GetAllRootWindows();
  27   for (aura::Window::Windows::iterator it = root_window_list.begin();
  28       it != root_window_list.end(); it++) {
  29     UpdateDisplay(*it);
  30   }
  31 }
  32
  33 void HighContrastController::UpdateDisplay(aura::Window* root_window) {
  34   root_window->layer()->SetLayerInverted(enabled_);
  35 }
  36
  37 void HighContrastController::OnRootWindowAdded(aura::Window* root_window) {
  38   UpdateDisplay(root_window);
  39 }
  40
  41 }  // namespace ash