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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtGui>
#include <QApplication>

class MyPushButton : public QPushButton
{
public:
    MyPushButton(QWidget *parent = 0);

    void paintEvent(QPaintEvent *);
};

MyPushButton::MyPushButton(QWidget *parent)
    : QPushButton(parent)
{
}

//! [0]
void MyPushButton::paintEvent(QPaintEvent *)
{
    QStyleOptionButton option;
    option.initFrom(this);
    option.state = isDown() ? QStyle::State_Sunken : QStyle::State_Raised;
    if (isDefault())
        option.features |= QStyleOptionButton::DefaultButton;
    option.text = text();
    option.icon = icon();

    QPainter painter(this);
    style()->drawControl(QStyle::CE_PushButton, &option, &painter, this);
}
//! [0]



class MyStyle : public QStyle
{
public:
    MyStyle();

    void drawPrimitive(PrimitiveElement element, const QStyleOption *option,
                       QPainter *painter, const QWidget *widget);
};

MyStyle::MyStyle()
{
//! [1]
    QStyleOptionFrame *option;

    if (const QStyleOptionFrame *frameOption =
           qstyleoption_cast<const QStyleOptionFrame *>(option)) {
        QStyleOptionFrameV2 frameOptionV2(*frameOption);

        // draw the frame using frameOptionV2
    }
//! [1]

//! [2]
    if (const QStyleOptionProgressBar *progressBarOption =
           qstyleoption_cast<const QStyleOptionProgressBar *>(option)) {
        QStyleOptionProgressBarV2 progressBarV2(*progressBarOption);

        // draw the progress bar using progressBarV2
    }
//! [2]

//! [3]
    if (const QStyleOptionTab *tabOption =
           qstyleoption_cast<const QStyleOptionTab *>(option)) {
        QStyleOptionTabV2 tabV2(*tabOption);

        // draw the tab using tabV2
   }
//! [3]
}

//! [4]
void MyStyle::drawPrimitive(PrimitiveElement element,
                            const QStyleOption *option,
                            QPainter *painter,
                            const QWidget *widget)
{
    if (element == PE_FrameFocusRect) {
        const QStyleOptionFocusRect *focusRectOption =
                qstyleoption_cast<const QStyleOptionFocusRect *>(option);
        if (focusRectOption) {
            // ...
        }
    }
    // ...
}
//! [4]

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MyPushButton button;
    button.show();
    return app.exec();
}