Qt 4.0: slidersgroup.cpp Example File (widgets/sliders/slidersgroup.cpp)

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# slidersgroup.cpp Example File
widgets/sliders/slidersgroup.cpp

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        **
        ** Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be used under the terms of the GNU General Public
    ** License version 2.0 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 GNU
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    ** review the following information:
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        #include <QtGui>

        #include "slidersgroup.h"

        SlidersGroup::SlidersGroup(Qt::Orientation orientation, const QString &title,
                                   QWidget *parent)
            : QGroupBox(title, parent)
        {
            slider = new QSlider(orientation);
            slider->setFocusPolicy(Qt::StrongFocus);
            slider->setTickPosition(QSlider::TicksBothSides);
            slider->setTickInterval(10);
            slider->setSingleStep(1);

            scrollBar = new QScrollBar(orientation);
            scrollBar->setFocusPolicy(Qt::StrongFocus);

            dial = new QDial;
            dial->setFocusPolicy(Qt::StrongFocus);

            connect(slider, SIGNAL(valueChanged(int)), scrollBar, SLOT(setValue(int)));
            connect(scrollBar, SIGNAL(valueChanged(int)), dial, SLOT(setValue(int)));
            connect(dial, SIGNAL(valueChanged(int)), slider, SLOT(setValue(int)));
            connect(dial, SIGNAL(valueChanged(int)), this, SIGNAL(valueChanged(int)));

            QBoxLayout::Direction direction;

            if (orientation == Qt::Horizontal)
                direction = QBoxLayout::TopToBottom;
            else
                direction = QBoxLayout::LeftToRight;

            QBoxLayout *slidersLayout = new QBoxLayout(direction);
            slidersLayout->addWidget(slider);
            slidersLayout->addWidget(scrollBar);
            slidersLayout->addWidget(dial);
            setLayout(slidersLayout);
        }

        void SlidersGroup::setValue(int value)
        {
            slider->setValue(value);
        }

        void SlidersGroup::setMinimum(int value)
        {
            slider->setMinimum(value);
            scrollBar->setMinimum(value);
            dial->setMinimum(value);
        }

        void SlidersGroup::setMaximum(int value)
        {
            slider->setMaximum(value);
            scrollBar->setMaximum(value);
            dial->setMaximum(value);
        }

        void SlidersGroup::invertAppearance(bool invert)
        {
            slider->setInvertedAppearance(invert);
            scrollBar->setInvertedAppearance(invert);
            dial->setInvertedAppearance(invert);
        }

        void SlidersGroup::invertKeyBindings(bool invert)
        {
            slider->setInvertedControls(invert);
            scrollBar->setInvertedControls(invert);
            dial->setInvertedControls(invert);
        }