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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+** the names of its contributors may be used to endorse or promote
+** products derived from this software without specific prior written
+** permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtWidgets>
+
+//! [0]
+class Window : public QWidget
+{
+public:
+ Window(QWidget *parent = 0)
+ : QWidget(parent)
+ {
+ QPushButton *button = new QPushButton(this);
+ button->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+
+ QVBoxLayout *layout = new QVBoxLayout;
+ layout->addWidget(button);
+ layout->setContentsMargins(80, 80, 80, 80);
+ setLayout(layout);
+//! [0]
+
+//! [1]
+ QStateMachine *machine = new QStateMachine(this);
+
+ QState *s1 = new QState();
+ s1->assignProperty(button, "text", "Outside");
+
+ QState *s2 = new QState();
+ s2->assignProperty(button, "text", "Inside");
+//! [1]
+
+//! [2]
+ QEventTransition *enterTransition = new QEventTransition(button, QEvent::Enter);
+ enterTransition->setTargetState(s2);
+ s1->addTransition(enterTransition);
+//! [2]
+
+//! [3]
+ QEventTransition *leaveTransition = new QEventTransition(button, QEvent::Leave);
+ leaveTransition->setTargetState(s1);
+ s2->addTransition(leaveTransition);
+//! [3]
+
+//! [4]
+ QState *s3 = new QState();
+ s3->assignProperty(button, "text", "Pressing...");
+
+ QEventTransition *pressTransition = new QEventTransition(button, QEvent::MouseButtonPress);
+ pressTransition->setTargetState(s3);
+ s2->addTransition(pressTransition);
+
+ QEventTransition *releaseTransition = new QEventTransition(button, QEvent::MouseButtonRelease);
+ releaseTransition->setTargetState(s2);
+ s3->addTransition(releaseTransition);
+//! [4]
+
+//! [5]
+ machine->addState(s1);
+ machine->addState(s2);
+ machine->addState(s3);
+
+ machine->setInitialState(s1);
+ machine->start();
+ }
+};
+//! [5]
+
+//! [6]
+int main(int argc, char **argv)
+{
+ QApplication app(argc, argv);
+ Window window;
+ window.resize(300, 300);
+ window.show();
+
+ return app.exec();
+}
+//! [6]