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 36 #include "SlowMenu.h" 37 38 39 const int32 kItemsToAddChunk = 20; 40 const bigtime_t kMaxTimeBuildingMenu = 200000; 41 42 43 // #pragma mark - BSlowMenu 44 45 46 BSlowMenu::BSlowMenu(const char* title, menu_layout layout) 47 : 48 BMenu(title, layout), 49 fMenuBuilt(false) 50 { 51 } 52 53 54 bool 55 BSlowMenu::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 91 bool 92 BSlowMenu::StartBuildingItemList() 93 { 94 return true; 95 } 96 97 98 bool 99 BSlowMenu::AddNextItem() 100 { 101 TRESPASS(); 102 // pure virtual, shouldn't be here 103 return true; 104 } 105 106 107 void 108 BSlowMenu::DoneBuildingItemList() 109 { 110 TRESPASS(); 111 // pure virtual, shouldn't be here 112 } 113 114 115 void 116 BSlowMenu::ClearMenuBuildingState() 117 { 118 TRESPASS(); 119 // pure virtual, shouldn't be here 120 } 121