1/* 2Open Tracker License 3 4Terms and Conditions 5 6Copyright (c) 1991-2000, Be Incorporated. All rights reserved. 7 8Permission is hereby granted, free of charge, to any person obtaining a copy of 9this software and associated documentation files (the "Software"), to deal in 10the Software without restriction, including without limitation the rights to 11use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 12of the Software, and to permit persons to whom the Software is furnished to do 13so, subject to the following conditions: 14 15The above copyright notice and this permission notice applies to all licensees 16and shall be included in all copies or substantial portions of the Software. 17 18THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF TITLE, MERCHANTABILITY, 20FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21BE INCORPORATED BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 22AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF, OR IN CONNECTION 23WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 24 25Except as contained in this notice, the name of Be Incorporated shall not be 26used in advertising or otherwise to promote the sale, use or other dealings in 27this Software without prior written authorization from Be Incorporated. 28 29Tracker(TM), Be(R), BeOS(R), and BeIA(TM) are trademarks or registered trademarks 30of Be Incorporated in the United States and other countries. Other brand product 31names are registered trademarks or trademarks of their respective holders. 32All rights reserved. 33*/ 34 35#ifndef __SLOW_MENU__ 36#define __SLOW_MENU__ 37 38#include <Menu.h> 39#include <MenuItem.h> 40#include <Debug.h> 41 42// SlowMenu is a convenience class that makes it easier to 43// use the AddDynamicItem callback to implement a menu that can 44// checks periodically between creating new items and quits 45// early if needed 46 47namespace BPrivate { 48 49class BSlowMenu : public BMenu { 50 public: 51 BSlowMenu(const char *title, menu_layout layout = B_ITEMS_IN_COLUMN); 52 53 protected: 54 virtual bool StartBuildingItemList(); 55 // set up state to start building the item list 56 // returns false if setup failed 57 virtual bool AddNextItem() = 0; 58 // returns false if done 59 virtual void DoneBuildingItemList() = 0; 60 // default version adds items from itemList to menu and deletes 61 // the list; override to sort items first, etc. 62 63 virtual void ClearMenuBuildingState() = 0; 64 65 protected: 66 virtual bool AddDynamicItem(add_state state); 67 // this is the callback from BMenu, you shouldn't need to override this 68 69 bool fMenuBuilt; 70}; 71 72} // namespace BPrivate 73 74using namespace BPrivate; 75 76#endif /* __SLOW_MENU__ */ 77