lcdrange.cpp Example File
tutorials/tutorial/t12/lcdrange.cpp
#include <QLCDNumber>
#include <QLabel>
#include <QSlider>
#include <QVBoxLayout>
#include "lcdrange.h"
LCDRange::LCDRange(QWidget *parent)
: QWidget(parent)
{
init();
}
LCDRange::LCDRange(const QString &text, QWidget *parent)
: QWidget(parent)
{
init();
setText(text);
}
void LCDRange::init()
{
QLCDNumber *lcd = new QLCDNumber(2);
lcd->setSegmentStyle(QLCDNumber::Filled);
slider = new QSlider(Qt::Horizontal);
slider->setRange(0, 99);
slider->setValue(0);
label = new QLabel;
label->setAlignment(Qt::AlignHCenter | Qt::AlignTop);
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);
layout->addWidget(label);
setLayout(layout);
setFocusProxy(slider);
}
int LCDRange::value() const
{
return slider->value();
}
QString LCDRange::text() const
{
return label->text();
}
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);
}
void LCDRange::setText(const QString &text)
{
label->setText(text);
}
Copyright © 2008 Nokia Corporation and/or its subsidiary(-ies) |
Trademarks |
Qt 4.4.3 |