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authorHenrik Kinnunen <fluxgen@fluxbox.org>2008-04-27 19:22:18 (GMT)
committerHenrik Kinnunen <fluxgen@fluxbox.org>2008-04-27 19:22:18 (GMT)
commit80b10f7772b91f1f4a61eace4e5235a79060e1f0 (patch)
tree27057e59c41188e7c2f724614233265fed03c9b3 /src/FbTk
parent40e17b4d0ef1b9503f21509e697dd4dcb24d2bbf (diff)
downloadfluxbox_lack-80b10f7772b91f1f4a61eace4e5235a79060e1f0.zip
fluxbox_lack-80b10f7772b91f1f4a61eace4e5235a79060e1f0.tar.bz2
Added SimpleObserver class.
This class works in the same way as the SimpleCommand class. Use it with the makeObserver function. It calls the receiver's member function when the subject sends a signal.
Diffstat (limited to 'src/FbTk')
-rw-r--r--src/FbTk/Makefile.am2
-rw-r--r--src/FbTk/SimpleObserver.hh70
2 files changed, 71 insertions, 1 deletions
diff --git a/src/FbTk/Makefile.am b/src/FbTk/Makefile.am
index 6fa874a..fcf0304 100644
--- a/src/FbTk/Makefile.am
+++ b/src/FbTk/Makefile.am
@@ -44,7 +44,7 @@ libFbTk_a_SOURCES = App.hh App.cc Color.cc Color.hh Command.hh \
44 StringUtil.hh StringUtil.cc Parser.hh Parser.cc \ 44 StringUtil.hh StringUtil.cc Parser.hh Parser.cc \
45 RegExp.hh RegExp.cc \ 45 RegExp.hh RegExp.cc \
46 FbString.hh FbString.cc \ 46 FbString.hh FbString.cc \
47 Subject.hh Subject.cc Observer.hh Observer.cc \ 47 Subject.hh Subject.cc Observer.hh Observer.cc SimpleObserver.hh \
48 Transparent.hh Transparent.cc \ 48 Transparent.hh Transparent.cc \
49 FbPixmap.hh FbPixmap.cc \ 49 FbPixmap.hh FbPixmap.cc \
50 FbDrawable.hh FbDrawable.cc \ 50 FbDrawable.hh FbDrawable.cc \
diff --git a/src/FbTk/SimpleObserver.hh b/src/FbTk/SimpleObserver.hh
new file mode 100644
index 0000000..aafdf59
--- /dev/null
+++ b/src/FbTk/SimpleObserver.hh
@@ -0,0 +1,70 @@
1// SimpleObserver.hh
2// Copyright (c) 2008 Fluxbox Team (fluxgen at fluxbox dot org)
3//
4// Permission is hereby granted, free of charge, to any person obtaining a
5// copy of this software and associated documentation files (the "Software"),
6// to deal in the Software without restriction, including without limitation
7// the rights to use, copy, modify, merge, publish, distribute, sublicense,
8// and/or sell copies of the Software, and to permit persons to whom the
9// Software is furnished to do so, subject to the following conditions:
10//
11// The above copyright notice and this permission notice shall be included in
12// all copies or substantial portions of the Software.
13//
14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20// DEALINGS IN THE SOFTWARE.
21
22#include "Observer.hh"
23#include "SimpleCommand.hh"
24
25namespace FbTk {
26
27/** Functor for observers, instead of using this directly use makeObserver.
28 * Usage:
29 * @code
30 * class SomeClass {
31 * public:
32 * void doAction();
33 * };
34 *
35 * SomeClass some;
36 *
37 * Observer* obs = makeProxyObserver(some, &SomeClass::doAction);
38 * SomeSubject subj;
39 * subj.attach(obs);
40 * @endcode
41 */
42template <typename Receiver>
43class SimpleObserver: public Observer {
44public:
45 typedef void (Receiver::* Action)();
46 SimpleObserver(Receiver &r, Action a):
47 m_receiver(r), m_action(a) {
48
49 }
50 void update(Subject *changedSubj) {
51 (m_receiver.*m_action)();
52 }
53private:
54 Receiver &m_receiver;
55 Action m_action;
56};
57
58// Helpers
59/** Creates an observer that takes no arguments.
60 * @param receiver The receiving instance.
61 * @param action A function in the receiving class.
62 * @return allocated simple observer. @see SimpleObserver
63 */
64template <typename Receiver, typename Action>
65Observer *makeObserver(Receiver &receiver, Action action) {
66 return new SimpleObserver<Receiver>( receiver, action );
67}
68
69}
70