1 /* 2 Open Tracker License 3 4 Terms and Conditions 5 6 Copyright (c) 1991-2000, Be Incorporated. All rights reserved. 7 8 Permission is hereby granted, free of charge, to any person obtaining a copy of 9 this software and associated documentation files (the "Software"), to deal in 10 the Software without restriction, including without limitation the rights to 11 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 12 of the Software, and to permit persons to whom the Software is furnished to do 13 so, subject to the following conditions: 14 15 The above copyright notice and this permission notice applies to all licensees 16 and shall be included in all copies or substantial portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF TITLE, MERCHANTABILITY, 20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 BE INCORPORATED BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 22 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF, OR IN CONNECTION 23 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 24 25 Except as contained in this notice, the name of Be Incorporated shall not be 26 used in advertising or otherwise to promote the sale, use or other dealings in 27 this Software without prior written authorization from Be Incorporated. 28 29 Tracker(TM), Be(R), BeOS(R), and BeIA(TM) are trademarks or registered trademarks 30 of Be Incorporated in the United States and other countries. Other brand product 31 names are registered trademarks or trademarks of their respective holders. 32 All 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 47 namespace BPrivate { 48 49 class 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 74 using namespace BPrivate; 75 76 #endif /* __SLOW_MENU__ */ 77