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lcdrange.cpp Example File
tutorial/t8/lcdrange.cpp

/****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** Licensees holding valid Qt Preview licenses may use this file in
** accordance with the Qt Preview License Agreement provided with the
** Software.
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** information about Qt Commercial License Agreements.
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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 <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);
}


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Qt 4.2.0-rc1