1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef ASH_SHELF_SHELF_ITEM_DELEGATE_H_ 6 #define ASH_SHELF_SHELF_ITEM_DELEGATE_H_ 7 8 #include "ash/ash_export.h" 9 #include "base/strings/string16.h" 10 11 namespace aura { 12 class Window; 13 } 14 15 namespace ui { 16 class Event; 17 class MenuModel; 18 } 19 20 namespace ash { 21 22 class ShelfMenuModel; 23 24 // Delegate for the LauncherItem. 25 class ASH_EXPORT ShelfItemDelegate { 26 public: 27 virtual ~ShelfItemDelegate() {} 28 29 // Invoked when the user clicks on a window entry in the launcher. 30 // |event| is the click event. The |event| is dispatched by a view 31 // and has an instance of |views::View| as the event target 32 // but not |aura::Window|. If the |event| is of type KeyEvent, it is assumed 33 // that this was triggered by keyboard action (Alt+<number>) and special 34 // handling might happen. 35 // Returns true if a new item was created. 36 virtual bool ItemSelected(const ui::Event& event) = 0; 37 38 // Returns the title to display. 39 virtual base::string16 GetTitle() = 0; 40 41 // Returns the context menumodel for the specified item on 42 // |root_window|. Return NULL if there should be no context 43 // menu. The caller takes ownership of the returned model. 44 virtual ui::MenuModel* CreateContextMenu(aura::Window* root_window) = 0; 45 46 // Returns the application menu model for the specified item. There are three 47 // possible return values: 48 // - A return of NULL indicates that no menu is wanted for this item. 49 // - A return of a menu with one item means that only the name of the 50 // application/item was added and there are no active applications. 51 // Note: This is useful for hover menus which also show context help. 52 // - A list containing the title and the active list of items. 53 // The caller takes ownership of the returned model. 54 // |event_flags| specifies the flags of the event which triggered this menu. 55 virtual ShelfMenuModel* CreateApplicationMenu(int event_flags) = 0; 56 57 // Whether the launcher item is draggable. 58 virtual bool IsDraggable() = 0; 59 60 // Returns true if a tooltip should be shown. 61 virtual bool ShouldShowTooltip() = 0; 62 }; 63 64 } // namespace ash 65 66 #endif // ASH_SHELF_SHELF_ITEM_DELEGATE_H_ 67
