1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
#ifdef HAVE_CONFIG_H
#include <../../nrnconf.h>
#endif
/*
* Copyright (c) 1992 Stanford University
* Copyright (c) 1992 Silicon Graphics, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that (i) the above copyright notices and this permission notice appear in
* all copies of the software and related documentation, and (ii) the names of
* Stanford and Silicon Graphics may not be used in any advertising or
* publicity relating to the software without the specific, prior written
* permission of Stanford and Silicon Graphics.
*
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL STANFORD OR SILICON GRAPHICS BE LIABLE FOR
* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
/*
* Observable - object to observe
*/
#include <InterViews/observe.h>
#include <OS/list.h>
declarePtrList(ObserverList,Observer)
implementPtrList(ObserverList,Observer)
Observable::Observable() {
observers_ = nil;
}
Observable::~Observable() {
ObserverList* list = observers_;
if (list != nil) {
// in case a disconnect removes items from the ObserverList
for (long i = list->count() - 1; i >= 0; --i) {
list->item(i)->disconnect(this);
if (i > list->count()) { i = list->count(); }
}
delete list;
}
}
void Observable::attach(Observer* o) {
ObserverList* list = observers_;
if (list == nil) {
list = new ObserverList(5);
observers_ = list;
}
list->append(o);
}
void Observable::detach(Observer* o) {
ObserverList* list = observers_;
if (list != nil) {
for (ListUpdater(ObserverList) i(*list); i.more(); i.next()) {
if (i.cur() == o) {
i.remove_cur();
break;
}
}
}
}
void Observable::notify() {
ObserverList* list = observers_;
if (list != nil) {
for (ListItr(ObserverList) i(*list); i.more(); i.next()) {
i.cur()->update(this);
}
}
}
Observer::Observer() { }
Observer::~Observer() { }
void Observer::update(Observable*) { }
void Observer::disconnect(Observable*) { }
|
