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

lcdrange.cpp Example File
tutorials/tutorial/t12/lcdrange.cpp

 /****************************************************************************
 **
 ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: Qt Software Information (qt-info@nokia.com)
 **
 ** This file is part of the example classes of the Qt Toolkit.
 **
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License versions 2.0 or 3.0 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.fsf.org/licensing/licenses/info/GPLv2.html and
 ** http://www.gnu.org/copyleft/gpl.html.  In addition, as a special
 ** exception, Nokia gives you certain additional rights. These rights
 ** are described in the Nokia Qt GPL Exception version 1.3, included in
 ** the file GPL_EXCEPTION.txt in this package.
 **
 ** Qt for Windows(R) Licensees
 ** As a special exception, Nokia, as the sole copyright holder for Qt
 ** Designer, grants users of the Qt/Eclipse Integration plug-in the
 ** right for the Qt/Eclipse Integration to link to functionality
 ** provided by Qt Designer and its related libraries.
 **
 ** If you are unsure which license is appropriate for your use, please
 ** contact the sales department at qt-sales@nokia.com.
 **
 ****************************************************************************/

 #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);
 }