Qt 4.8: window.cpp Example File (widgets/sliders/window.cpp)

Qt Reference Documentation

- Qt 4.8
- ALL VERSIONS

- A
- A
- A
- Print

# 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:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of The Qt Company Ltd nor the names of its
     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
     **
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #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);
     }