slidersgroup.cpp Example File

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 #include <QtWidgets>

 #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);
 }