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