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 36#include "SlowMenu.h" 37 38 39const int32 kItemsToAddChunk = 20; 40const bigtime_t kMaxTimeBuildingMenu = 200000; 41 42 43// #pragma mark - BSlowMenu 44 45 46BSlowMenu::BSlowMenu(const char* title, menu_layout layout) 47 : 48 BMenu(title, layout), 49 fMenuBuilt(false) 50{ 51} 52 53 54bool 55BSlowMenu::AddDynamicItem(add_state state) 56{ 57 if (fMenuBuilt) 58 return false; 59 60 if (state == B_ABORT) { 61 ClearMenuBuildingState(); 62 return false; 63 } 64 65 if (state == B_INITIAL_ADD && !StartBuildingItemList()) { 66 ClearMenuBuildingState(); 67 return false; 68 } 69 70 bigtime_t timeToBail = system_time() + kMaxTimeBuildingMenu; 71 for (int32 count = 0; count < kItemsToAddChunk; count++) { 72 if (!AddNextItem()) { 73 fMenuBuilt = true; 74 DoneBuildingItemList(); 75 ClearMenuBuildingState(); 76 return false; 77 // done with menu, don't call again 78 } 79 80 if (system_time() > timeToBail) { 81 // we've been in here long enough, come back later 82 break; 83 } 84 } 85 86 return true; 87 // call me again, got more to show 88} 89 90 91bool 92BSlowMenu::StartBuildingItemList() 93{ 94 return true; 95} 96 97 98bool 99BSlowMenu::AddNextItem() 100{ 101 TRESPASS(); 102 // pure virtual, shouldn't be here 103 return true; 104} 105 106 107void 108BSlowMenu::DoneBuildingItemList() 109{ 110 TRESPASS(); 111 // pure virtual, shouldn't be here 112} 113 114 115void 116BSlowMenu::ClearMenuBuildingState() 117{ 118 TRESPASS(); 119 // pure virtual, shouldn't be here 120} 121