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

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

        /****************************************************************************
        **
        ** 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
    ** General Public Licensing requirements will be met:
    ** http://www.trolltech.com/products/qt/opensource.html
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    ** If you are unsure which license is appropriate for your use, please
    ** review the following information:
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        **
        ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
        ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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        ****************************************************************************/

        #include <QtGui>

        #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);
        }