/****************************************************************************
 **
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the test suite of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:GPL-EXCEPT$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
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 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License version 3 as published by the Free Software
 ** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
 ** included in the packaging of this file. Please review the following
 ** information to ensure the GNU General Public License requirements will
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 ****************************************************************************/

#include <QApplication>
#include <QPushButton>
#include <QVBoxLayout>

class TopWidget : public QWidget
{
    Q_OBJECT
public:
    TopWidget(QWidget *parent = 0) : QWidget(parent)
    {
        QVBoxLayout *layout = new QVBoxLayout;
        QPushButton *button = new QPushButton("Change app icon");
        connect(button, SIGNAL(clicked()), this, SLOT(changeIcon()));
        layout->addWidget(button);
        setLayout(layout);
    }
public slots:
    void changeIcon()
    {
        QPixmap pix(32, 32);
        pix.fill(Qt::red);
        QIcon i(pix);
        qApp->setWindowIcon(i);
    }
};

#include "main.moc"

int main(int argc, char **argv)
{
    QApplication a(argc, argv);
    TopWidget w;
    w.show();
    return a.exec();
}