Date and Time dialog for when the clock isn't synced.

chrome/browser/ui/webui/options/chromeos/date_time_options_handler.h

+// 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.
+
+#ifndef CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_DATE_TIME_OPTIONS_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_DATE_TIME_OPTIONS_HANDLER_H_
+
+#include "base/compiler_specific.h"
+#include "chrome/browser/ui/webui/options/options_ui.h"
+#include "chromeos/dbus/system_clock_client.h"
+
+namespace chromeos {
+namespace options {
+
+// Chrome OS handler for the set date/time link in the Advanced settings page.
+class DateTimeOptionsHandler : public ::options::OptionsPageUIHandler,
+                               public SystemClockClient::Observer {
+ public:
+  DateTimeOptionsHandler();
+  virtual ~DateTimeOptionsHandler();
+
+  // OptionsPageUIHandler:
+  virtual void GetLocalizedValues(
+      base::DictionaryValue* localized_strings) OVERRIDE;
+  virtual void InitializeHandler() OVERRIDE;
+  virtual void InitializePage() OVERRIDE;
+  virtual void RegisterMessages() OVERRIDE;
+
+ private:
+  // SystemClockClient::Observer:
+  virtual void SystemClockCanSetTimeChanged(bool can_set_time) OVERRIDE;
+
+  // Callback for the "showSetTime" message to show the set time dialog. No
+  // arguments are expected.
+  void HandleShowSetTime(const base::ListValue* args);
+
+  // Only expose the button and dialog if the system time can be set.
+  bool can_set_time_;
+  bool page_initialized_;
+
+  DISALLOW_COPY_AND_ASSIGN(DateTimeOptionsHandler);
+};
+
+}  // namespace options
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_DATE_TIME_OPTIONS_HANDLER_H_