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