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

# lcdrange.cpp Example File
tutorials/tutorial/t14/lcdrange.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** 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 files LICENSE.GPL2 and LICENSE.GPL3
     ** included in the packaging of this file.  Alternatively you may (at
     ** your option) use any later version of the GNU General Public
     ** License if such license has been publicly approved by Trolltech ASA
     ** (or its successors, if any) and the KDE Free Qt Foundation. In
     ** addition, as a special exception, Trolltech gives you certain
     ** additional rights. These rights are described in the Trolltech GPL
     ** Exception version 1.2, which can be found at
     ** http://www.trolltech.com/products/qt/gplexception/ and in the file
     ** GPL_EXCEPTION.txt in this package.
     **
     ** Please review the following information to ensure GNU General
     ** Public Licensing requirements will be met:
     ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
     ** you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
     ** or contact the sales department at sales@trolltech.com.
     **
     ** In addition, as a special exception, Trolltech, 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.
     **
     ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
     ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
     ** granted herein.
     **
     ** 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 <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);
         label->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);

         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);
     }