[Athena] Make a quick power button tap suspend the device

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/screen/public/screen_manager.h"
 #include "athena/system/background_controller.h"
 #include "athena/system/orientation_controller.h"
 #include "athena/system/power_button_controller.h"
@@ skipping 58 matching lines @@
   views::View* time_view_;
   views::View* status_icon_view_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemInfoView);
 };
 
 class SystemUIImpl : public SystemUI {
  public:
   SystemUIImpl(scoped_refptr<base::TaskRunner> blocking_task_runner)
       : orientation_controller_(new OrientationController()),
-        power_button_controller_(new PowerButtonController),
         background_container_(NULL),
         system_modal_container_(NULL) {
     orientation_controller_->InitWith(blocking_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);
 
+    power_button_controller_.reset(
+        new PowerButtonController(system_modal_container_));

[flackr, 2014/09/19 14:45:29]

This container doesn't seem to show above the login screen.

[pkotwicz, 2014/09/20 00:01:59]

Thanks for catching this!

I have added a new container with priority CP_LOGIN_SCREEN_SYSTEM_MODAL
Eventually, we will want to pick the appropriate container based on whether the
user has logged in. However, I am leaving that for later

     background_controller_.reset(
         new BackgroundController(background_container_));
   }
 
   virtual void SetBackgroundImage(const gfx::ImageSkia& image) OVERRIDE {
     background_controller_->SetImage(image);
   }
 
   virtual views::View* CreateSystemInfoView(ColorScheme color_scheme) OVERRIDE {
     return new SystemInfoView(color_scheme, system_modal_container_);
@@ skipping 31 matching lines @@
 }
 
 // static
 void SystemUI::Shutdown() {
   CHECK(instance);
   delete instance;
   instance = NULL;
 }
 
 }  // namespace athena