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#ifndef _SLOW_MENU_H
35#define _SLOW_MENU_H
36
37
38// SlowMenu is a convenience class that makes it easier to
39// use the AddDynamicItem callback to implement a menu that can
40// checks periodically between creating new items and quits
41// early if needed
42
43
44#include <Menu.h>
45#include <MenuItem.h>
46#include <Debug.h>
47
48
49namespace BPrivate {
50
51class BSlowMenu : public BMenu {
52public:
53	BSlowMenu(const char* title, menu_layout layout = B_ITEMS_IN_COLUMN);
54
55protected:
56	virtual bool StartBuildingItemList();
57		// set up state to start building the item list
58		// returns false if setup failed
59	virtual bool AddNextItem() = 0;
60		// returns false if done
61	virtual void DoneBuildingItemList() = 0;
62		// default version adds items from itemList to menu and deletes
63		// the list; override to sort items first, etc.
64
65	virtual void ClearMenuBuildingState() = 0;
66
67protected:
68	virtual bool AddDynamicItem(add_state state);
69		// this is the callback from BMenu, you shouldn't need to
70		// override this
71
72	bool fMenuBuilt;
73};
74
75} // namespace BPrivate
76
77using namespace BPrivate;
78
79
80#endif	// _SLOW_MENU_H
81