[ash-md] Applied Material Design layout to TrayItemMore system menu rows.

ash/common/system/tray/tray_popup_utils.h

+// Copyright 2016 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 ASH_COMMON_SYSTEM_TRAY_TRAY_POPUP_UTILS_H_
+#define ASH_COMMON_SYSTEM_TRAY_TRAY_POPUP_UTILS_H_
+
+#include "ash/common/system/tray/tri_view.h"
+#include "base/strings/string16.h"
+
+namespace views {
+class ButtonListener;
+class ImageView;
+class Label;
+class LabelButton;
+class LayoutManager;
+class Slider;
+class SliderListener;
+}  // namespace views
+
+namespace ash {
+
+// Factory/utility functions used by the system menu.
+class TrayPopupUtils {
+ public:
+  // Creates a default container view to be used most system menu rows. The
+  // caller takes over ownership of the created view.
+  //
+  // The returned view consists of 3 regions: START, CENTER, and END. Any child
+  // Views added to the START and END containers will be added horizonatlly and
+  // any Views added to the CENTER container will be added vertically.
+  //
+  // The START and END containers have a fixed width but can grow into the
+  // CENTER container if space is required and available.
+  //
+  // The CENTER container has a flexible width.
+  static TriView* CreateDefaultRowView();
+
+  // Creates the default layout manager by CreateDefault() row for the given
+  // |container|. To be used when mutliple targetable areas are required within
+  // a single row.
+  static std::unique_ptr<views::LayoutManager> CreateLayoutManager(
+      TriView::Container container);
+
+  // Returns a label that has been configured for system menu layout. This
+  // should be used by all rows that require a label, i.e. both default and
+  // detailed rows should use this.
+  //
+  // TODO(bruthig): Update all system menu rows to use this.
+  static views::Label* CreateDefaultLabel();
+
+  // Returns an image view to be used for the main image of a system menu row.
+  // This should be used by all rows that have a main image, i.e. both default
+  // and detailed rows should use this.
+  //
+  // TODO(bruthig): Update all system menu rows to use this.
+  static views::ImageView* CreateMainImageView();
+
+  // Returns an image view to be used for the 'more' arrow image on rows. In
+  // general this applies to all rows in the system menu that have a 'more'
+  // image however most, if not all, are default rows.
+  //
+  // TODO(bruthig): Update all default rows to use this.
+  static views::ImageView* CreateMoreImageView();
+
+ private:
+  TrayPopupUtils() = delete;
+  ~TrayPopupUtils() = delete;
+
+  // Configures the specified |container| view with the default layout. Used by
+  // CreateDefaultRowView().
+  static void ConfigureDefaultLayout(TriView* tri_view,
+                                     TriView::Container container);
+};
+
+}  // namespace ash
+
+#endif  // ASH_COMMON_SYSTEM_TRAY_TRAY_POPUP_UTILS_H_