[Athena] Add status icons and system time to the desktop background

athena/system/system_ui_impl.cc

 // Copyright 2014 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 "athena/system/public/system_ui.h"
 
+#include "athena/common/container_priorities.h"
+#include "athena/common/fill_layout_manager.h"
+#include "athena/screen/public/screen_manager.h"
+#include "athena/system/background_controller.h"
 #include "athena/system/device_socket_listener.h"
 #include "athena/system/orientation_controller.h"
 #include "athena/system/power_button_controller.h"
+#include "athena/system/status_icon_container_view.h"
+#include "athena/system/time_view.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "ui/aura/window.h"
 
 namespace athena {
 namespace {
 
 SystemUI* instance = NULL;
 
 class SystemUIImpl : public SystemUI {
  public:
   SystemUIImpl(scoped_refptr<base::TaskRunner> file_task_runner)
       : orientation_controller_(new OrientationController()),
-        power_button_controller_(new PowerButtonController) {
+        power_button_controller_(new PowerButtonController),
+        background_container_(NULL),
+        system_modal_container_(NULL) {
     orientation_controller_->InitWith(file_task_runner);
   }
 
   virtual ~SystemUIImpl() {
     // Stops file watching now if exists. Waiting until message loop shutdon
     // leads to FilePathWatcher crash.
     orientation_controller_->Shutdown();
   }
 
+  void Init() {
+    background_container_ = ScreenManager::Get()->CreateContainer(
+        ScreenManager::ContainerParams("AthenaBackground", CP_BACKGROUND));
+    background_container_->SetLayoutManager(
+        new FillLayoutManager(background_container_));
+    ScreenManager::ContainerParams system_modal_params(
+        "AthenaSystemModalContainer", CP_SYSTEM_MODAL);
+    system_modal_params.can_activate_children = true;
+    system_modal_container_ =
+        ScreenManager::Get()->CreateContainer(system_modal_params);
+
+    background_controller_.reset(
+        new BackgroundController(background_container_));
+  }
+
+  virtual void SetBackgroundImage(const gfx::ImageSkia& image) OVERRIDE {
+    background_controller_->SetImage(image);
+  }
+
+  virtual views::View* CreateTimeView() OVERRIDE {
+    return new TimeView;
+  }
+
+  virtual views::View* CreateStatusIconView() OVERRIDE {
+    return new StatusIconContainerView(system_modal_container_);
+  }
+
  private:
   scoped_refptr<OrientationController> orientation_controller_;
   scoped_ptr<PowerButtonController> power_button_controller_;
+  scoped_ptr<BackgroundController> background_controller_;
+
+  // The parent container for the background.
+  aura::Window* background_container_;
+
+  // The parent container used by the "select network" dialog.
+  aura::Window* system_modal_container_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemUIImpl);
 };
 
 }  // namespace
 
 // static
 SystemUI* SystemUI::Create(scoped_refptr<base::TaskRunner> file_task_runner) {
   DeviceSocketListener::CreateSocketManager(file_task_runner);
-  instance = new SystemUIImpl(file_task_runner);
+  SystemUIImpl* system_ui = new SystemUIImpl(file_task_runner);
+  instance = system_ui;
+  system_ui->Init();
   return instance;
 }
 
+// static
+SystemUI* SystemUI::Get() {
+  DCHECK(instance);
+  return instance;
+}
+
 // static
 void SystemUI::Shutdown() {
   CHECK(instance);
   delete instance;
   instance = NULL;
   DeviceSocketListener::ShutdownSocketManager();
 }
 
 }  // namespace athena