Qt 5.6 | Qt Widgets | Sliders Example | window.cpp Example File

Qt 5.6.3 Reference Documentation

# window.cpp Example File

widgets/sliders/window.cpp

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      #include <QtWidgets>

      #include "slidersgroup.h"
      #include "window.h"

      Window::Window()
      {
          horizontalSliders = new SlidersGroup(Qt::Horizontal, tr("Horizontal"));
          verticalSliders = new SlidersGroup(Qt::Vertical, tr("Vertical"));

          stackedWidget = new QStackedWidget;
          stackedWidget->addWidget(horizontalSliders);
          stackedWidget->addWidget(verticalSliders);

          createControls(tr("Controls"));

          connect(horizontalSliders, SIGNAL(valueChanged(int)),
                  verticalSliders, SLOT(setValue(int)));
          connect(verticalSliders, SIGNAL(valueChanged(int)),
                  valueSpinBox, SLOT(setValue(int)));
          connect(valueSpinBox, SIGNAL(valueChanged(int)),
                  horizontalSliders, SLOT(setValue(int)));

          QHBoxLayout *layout = new QHBoxLayout;
          layout->addWidget(controlsGroup);
          layout->addWidget(stackedWidget);
          setLayout(layout);

          minimumSpinBox->setValue(0);
          maximumSpinBox->setValue(20);
          valueSpinBox->setValue(5);

          setWindowTitle(tr("Sliders"));
      }

      void Window::createControls(const QString &title)
      {
          controlsGroup = new QGroupBox(title);

          minimumLabel = new QLabel(tr("Minimum value:"));
          maximumLabel = new QLabel(tr("Maximum value:"));
          valueLabel = new QLabel(tr("Current value:"));

          invertedAppearance = new QCheckBox(tr("Inverted appearance"));
          invertedKeyBindings = new QCheckBox(tr("Inverted key bindings"));

          minimumSpinBox = new QSpinBox;
          minimumSpinBox->setRange(-100, 100);
          minimumSpinBox->setSingleStep(1);

          maximumSpinBox = new QSpinBox;
          maximumSpinBox->setRange(-100, 100);
          maximumSpinBox->setSingleStep(1);

          valueSpinBox = new QSpinBox;
          valueSpinBox->setRange(-100, 100);
          valueSpinBox->setSingleStep(1);

          orientationCombo = new QComboBox;
          orientationCombo->addItem(tr("Horizontal slider-like widgets"));
          orientationCombo->addItem(tr("Vertical slider-like widgets"));

          connect(orientationCombo, SIGNAL(activated(int)),
                  stackedWidget, SLOT(setCurrentIndex(int)));
          connect(minimumSpinBox, SIGNAL(valueChanged(int)),
                  horizontalSliders, SLOT(setMinimum(int)));
          connect(minimumSpinBox, SIGNAL(valueChanged(int)),
                  verticalSliders, SLOT(setMinimum(int)));
          connect(maximumSpinBox, SIGNAL(valueChanged(int)),
                  horizontalSliders, SLOT(setMaximum(int)));
          connect(maximumSpinBox, SIGNAL(valueChanged(int)),
                  verticalSliders, SLOT(setMaximum(int)));
          connect(invertedAppearance, SIGNAL(toggled(bool)),
                  horizontalSliders, SLOT(invertAppearance(bool)));
          connect(invertedAppearance, SIGNAL(toggled(bool)),
                  verticalSliders, SLOT(invertAppearance(bool)));
          connect(invertedKeyBindings, SIGNAL(toggled(bool)),
                  horizontalSliders, SLOT(invertKeyBindings(bool)));
          connect(invertedKeyBindings, SIGNAL(toggled(bool)),
                  verticalSliders, SLOT(invertKeyBindings(bool)));

          QGridLayout *controlsLayout = new QGridLayout;
          controlsLayout->addWidget(minimumLabel, 0, 0);
          controlsLayout->addWidget(maximumLabel, 1, 0);
          controlsLayout->addWidget(valueLabel, 2, 0);
          controlsLayout->addWidget(minimumSpinBox, 0, 1);
          controlsLayout->addWidget(maximumSpinBox, 1, 1);
          controlsLayout->addWidget(valueSpinBox, 2, 1);
          controlsLayout->addWidget(invertedAppearance, 0, 2);
          controlsLayout->addWidget(invertedKeyBindings, 1, 2);
          controlsLayout->addWidget(orientationCombo, 3, 0, 1, 3);
          controlsGroup->setLayout(controlsLayout);
      }