Qt 5.9 | Qt Widgets | Sliders Example | slidersgroup.cpp Example File

Qt 5.9.9 Reference Documentation

# slidersgroup.cpp Example File

widgets/sliders/slidersgroup.cpp

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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);
      }