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
|
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Free Documentation License
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of this
** file.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\example statemachine/eventtransitions
\title Event Transitions Example
The Event Transitions example shows how to use event transitions, a
feature of \l{The State Machine Framework}.
\snippet examples/statemachine/eventtransitions/main.cpp 0
The \c Window class's constructors begins by creating a button.
\snippet examples/statemachine/eventtransitions/main.cpp 1
Two states, \c s1 and \c s2, are created; upon entry they will assign
"Outside" and "Inside" to the button's text, respectively.
\snippet examples/statemachine/eventtransitions/main.cpp 2
When the button receives an event of type QEvent::Enter and the state
machine is in state \c s1, the machine will transition to state \c s2.
\snippet examples/statemachine/eventtransitions/main.cpp 3
When the button receives an event of type QEvent::Leave and the state
machine is in state \c s2, the machine will transition back to state \c
s1.
\snippet examples/statemachine/eventtransitions/main.cpp 4
Next, the state \c s3 is created. \c s3 will be entered when the button
receives an event of type QEvent::MouseButtonPress and the state machine
is in state \c s2. When the button receives an event of type
QEvent::MouseButtonRelease and the state machine is in state \c s3, the
machine will transition back to state \c s2.
\snippet examples/statemachine/eventtransitions/main.cpp 5
Finally, the states are added to the machine as top-level states, the
initial state is set to be \c s1 ("Outside"), and the machine is started.
\snippet examples/statemachine/eventtransitions/main.cpp 6
The main() function constructs a Window object and shows it.
*/
|
