MultiMonitor support

ash/monitor/monitor_controller.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/monitor/monitor_controller.h"
+
+#include "ash/monitor/multi_monitor_manager.h"
+#include "ash/monitor/secondary_monitor_view.h"
+#include "ash/shell.h"
+#include "ash/wm/base_layout_manager.h"
+#include "ash/wm/root_window_layout_manager.h"
+#include "base/stl_util.h"
+#include "ui/aura/env.h"
+#include "ui/aura/monitor.h"
+#include "ui/aura/root_window.h"
+#include "ui/aura/window.h"
+
+namespace ash {
+namespace internal {
+
+namespace {
+
+void SetupAsSecondaryMonitor(aura::RootWindow* root) {
+  root->SetLayoutManager(new internal::RootWindowLayoutManager(root));
+  aura::Window* container = new aura::Window(NULL);
+  container->SetName("SecondaryMonitorContainer");
+  container->Init(ui::Layer::LAYER_NOT_DRAWN);
+  root->AddChild(container);
+  container->Show();
+  container->SetLayoutManager(new internal::BaseLayoutManager(root));
+  CreateSecondaryMonitorWidget(container);
+  root->ShowRootWindow();
+}
+
+}  // namespace
+
+MonitorController::MonitorController() {
+  aura::Env::GetInstance()->monitor_manager()->AddObserver(this);
+  Init();
+}
+
+MonitorController::~MonitorController() {
+  aura::Env::GetInstance()->monitor_manager()->RemoveObserver(this);
+  // Remove the root first.
+  aura::Monitor* monitor = Shell::GetRootWindow()->GetProperty(kMonitorKey);
+  root_windows_.erase(monitor);
+  STLDeleteContainerPairSecondPointers(
+      root_windows_.begin(), root_windows_.end());
+}
+
+void MonitorController::OnMonitorBoundsChanged(const aura::Monitor* monitor) {
+  if (aura::MonitorManager::use_fullscreen_host_window())
+    root_windows_[monitor]->SetHostBounds(monitor->bounds());
+}
+
+void MonitorController::Init() {
+  aura::MonitorManager* monitor_manager =
+      aura::Env::GetInstance()->monitor_manager();
+  for (size_t i = 0; i < monitor_manager->GetNumMonitors(); ++i) {
+    aura::Monitor* monitor = monitor_manager->GetMonitorAt(i);
+    const aura::Monitor* key = monitor;
+    if (i == 0) {
+      // Primary monitor
+      root_windows_[key] = Shell::GetRootWindow();
+    } else {
+      aura::RootWindow* root =
+          monitor_manager->CreateRootWindowForMonitor(monitor);
+      root_windows_[key] = root;
+      SetupAsSecondaryMonitor(root);
+    }
+  }
+}
+
+}  // namespace internal
+}  // namespace ash