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authorQt by Nokia <qt-info@nokia.com>2011-04-27 12:05:43 +0200
committeraxis <qt-info@nokia.com>2011-04-27 12:05:43 +0200
commit38be0d13830efd2d98281c645c3a60afe05ffece (patch)
tree6ea73f3ec77f7d153333779883e8120f82820abe /doc/src/examples/eventtransitions.qdoc
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+/****************************************************************************
+**
+** 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.
+
+*/