- Qt 5.5
- Qt Widgets
- Sliders Example
- window.cpp Example File
- Qt 5.5.1 Reference Documentation

# window.cpp Example File

widgets/sliders/window.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
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    **     contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
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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);
    }