ash: Rename more Launcher classes to Shelf*.

ash/launcher/launcher_item_delegate.h

-// Copyright 2013 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_LAUNCHER_LAUNCHER_ITEM_DELEGATE_H_
-#define ASH_LAUNCHER_LAUNCHER_ITEM_DELEGATE_H_
-
-#include "ash/ash_export.h"
-#include "ash/launcher/launcher_types.h"
-#include "base/strings/string16.h"
-#include "ui/base/models/simple_menu_model.h"
-
-namespace aura {
-class RootWindow;
-}
-
-namespace ui {
-class Event;
-}
-
-namespace ash {
-
-// A special menu model which keeps track of an "active" menu item.
-class ASH_EXPORT LauncherMenuModel : public ui::SimpleMenuModel {
- public:
-  explicit LauncherMenuModel(ui::SimpleMenuModel::Delegate* delegate)
-      : ui::SimpleMenuModel(delegate) {}
-
-  // Returns |true| when the given |command_id| is active and needs to be drawn
-  // in a special state.
-  virtual bool IsCommandActive(int command_id) const = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(LauncherMenuModel);
-};
-
-// Delegate for the LauncherItem.
-class ASH_EXPORT LauncherItemDelegate {
- public:
-  virtual ~LauncherItemDelegate() {}
-
-  // Invoked when the user clicks on a window entry in the launcher.
-  // |event| is the click event. The |event| is dispatched by a view
-  // and has an instance of |views::View| as the event target
-  // but not |aura::Window|. If the |event| is of type KeyEvent, it is assumed
-  // that this was triggered by keyboard action (Alt+<number>) and special
-  // handling might happen.
-  // Returns true if a new item was created.
-  virtual bool ItemSelected(const ui::Event& event) = 0;
-
-  // Returns the title to display.
-  virtual base::string16 GetTitle() = 0;
-
-  // Returns the context menumodel for the specified item on
-  // |root_window|.  Return NULL if there should be no context
-  // menu. The caller takes ownership of the returned model.
-  virtual ui::MenuModel* CreateContextMenu(aura::Window* root_window) = 0;
-
-  // Returns the application menu model for the specified item. There are three
-  // possible return values:
-  //  - A return of NULL indicates that no menu is wanted for this item.
-  //  - A return of a menu with one item means that only the name of the
-  //    application/item was added and there are no active applications.
-  //    Note: This is useful for hover menus which also show context help.
-  //  - A list containing the title and the active list of items.
-  // The caller takes ownership of the returned model.
-  // |event_flags| specifies the flags of the event which triggered this menu.
-  virtual ash::LauncherMenuModel* CreateApplicationMenu(int event_flags) = 0;
-
-  // Whether the launcher item is draggable.
-  virtual bool IsDraggable() = 0;
-
-  // Returns true if a tooltip should be shown.
-  virtual bool ShouldShowTooltip() = 0;
-};
-
-}  // namespace ash
-
-#endif  // ASH_LAUNCHER_LAUNCHER_ITEM_DELEGATE_H_