Home · All Classes · Main Classes · Grouped Classes · Modules · Functions

lcdrange.cpp Example File
^{tutorial/t9/lcdrange.cpp}

    /****************************************************************************
    **
    ** Copyright (C) 2005-2006 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
    **
    ** If you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://www.trolltech.com/products/qt/licensing.html or contact the
    ** sales department at sales@trolltech.com.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #include <QLCDNumber>
    #include <QSlider>
    #include <QVBoxLayout>

    #include "lcdrange.h"

    LCDRange::LCDRange(QWidget *parent)
        : QWidget(parent)
    {
        QLCDNumber *lcd = new QLCDNumber(2);
        lcd->setSegmentStyle(QLCDNumber::Filled);

        slider = new QSlider(Qt::Horizontal);
        slider->setRange(0, 99);
        slider->setValue(0);

        connect(slider, SIGNAL(valueChanged(int)),
                lcd, SLOT(display(int)));
        connect(slider, SIGNAL(valueChanged(int)),
                this, SIGNAL(valueChanged(int)));

        QVBoxLayout *layout = new QVBoxLayout;
        layout->addWidget(lcd);
        layout->addWidget(slider);
        setLayout(layout);

        setFocusProxy(slider);
    }

    int LCDRange::value() const
    {
        return slider->value();
    }

    void LCDRange::setValue(int value)
    {
        slider->setValue(value);
    }

    void LCDRange::setRange(int minValue, int maxValue)
    {
        if (minValue < 0 || maxValue > 99 || minValue > maxValue) {
            qWarning("LCDRange::setRange(%d, %d)\n"
                     "\tRange must be 0..99\n"
                     "\tand minValue must not be greater than maxValue",
                     minValue, maxValue);
            return;
        }
        slider->setRange(minValue, maxValue);
    }