lcdrange.cpp Example File
tutorial/t8/lcdrange.cpp
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** Copyright (C) 2005-2005 Trolltech AS. All rights reserved.
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** This file is part of the documentation of the Qt Toolkit.
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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);
}