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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/examples/life/life.doc:4 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Conway's Game of Life</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: #ffffff; color: black; }--></style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr bgcolor="#E5E5E5"><td valign=center> <a href="index.html"><font color="#004faf">Home</font></a> | <a href="classes.html"><font color="#004faf">All&nbsp;Classes</font></a> | <a href="mainclasses.html"><font color="#004faf">Main&nbsp;Classes</font></a> | <a href="annotated.html"><font color="#004faf">Annotated</font></a> | <a href="groups.html"><font color="#004faf">Grouped&nbsp;Classes</font></a> | <a href="functions.html"><font color="#004faf">Functions</font></a></td><td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Conway's Game of Life</h1>   <p> <hr><p> Header file:<p> <pre>/****************************************************************************** $Id:  qt/life.h   3.0.5   edited Oct 12 2001 $**** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.**** This file is part of an example program for Qt.  This example** program may be used, distributed and modified without limitation.*******************************************************************************/#ifndef LIFE_H#define LIFE_H#include &lt;<a href="qframe-h.html">qframe.h</a>&gt;class LifeWidget : public <a href="qframe.html">QFrame</a>{    <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>public:    LifeWidget( int s = 10, QWidget *parent = 0, const char *name = 0 );    void        setPoint( int i, int j );    int         maxCol() { return maxi; }    int         maxRow() { return maxj; }public slots:    void        nextGeneration();    void        clear();protected:    virtual void paintEvent( <a href="qpaintevent.html">QPaintEvent</a> * );    virtual void mouseMoveEvent( <a href="qmouseevent.html">QMouseEvent</a> * );    virtual void mousePressEvent( <a href="qmouseevent.html">QMouseEvent</a> * );    virtual void resizeEvent( <a href="qresizeevent.html">QResizeEvent</a> * );    void         mouseHandle( const <a href="qpoint.html">QPoint</a> &amp;pos );private:    enum { MAXSIZE = 50, MINSIZE = 10, BORDER = 5 };    bool        cells[2][MAXSIZE + 2][MAXSIZE + 2];    int         current;    int         maxi, maxj;    int pos2index( int x )    {        return ( x - BORDER ) / SCALE + 1;    }    int index2pos( int i )    {        return  ( i - 1 ) * SCALE + BORDER;    }    int SCALE;};#endif // LIFE_H</pre><p> <hr><p> Implementation:<p> <pre>/****************************************************************************** $Id:  qt/life.cpp   3.0.5   edited Oct 12 2001 $**** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.**** This file is part of an example program for Qt.  This example** program may be used, distributed and modified without limitation.*******************************************************************************/#include "life.h"#include &lt;<a href="qpainter-h.html">qpainter.h</a>&gt;#include &lt;<a href="qdrawutil-h.html">qdrawutil.h</a>&gt;#include &lt;<a href="qcheckbox-h.html">qcheckbox.h</a>&gt;#include &lt;<a href="qevent-h.html">qevent.h</a>&gt;#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;// The main game of life widget<a name="f516"></a>LifeWidget::LifeWidget( int s, QWidget *parent, const char *name )    : <a href="qframe.html">QFrame</a>( parent, name ){    SCALE = s;    maxi = maxj = 50;    <a href="qwidget.html#setMinimumSize">setMinimumSize</a>( MINSIZE * SCALE + 2 * BORDER,                   MINSIZE * SCALE + 2 * BORDER );    <a href="qwidget.html#setMaximumSize">setMaximumSize</a>( MAXSIZE * SCALE + 2 * BORDER,                   MAXSIZE * SCALE + 2 * BORDER );    <a href="qwidget.html#setSizeIncrement">setSizeIncrement</a>( SCALE, SCALE);    clear();    <a href="qwidget.html#resize">resize</a>( maxi * SCALE + 2 * BORDER , maxj * SCALE + 2 * BORDER );}void <a name="f517"></a>LifeWidget::clear(){    current = 0;    for ( int t = 0; t &lt; 2; t++ )        for ( int i = 0; i &lt; MAXSIZE + 2; i++ )            for ( int j = 0; j &lt; MAXSIZE + 2; j++ )                cells[t][i][j] = FALSE;    <a href="qwidget.html#repaint">repaint</a>();}// We assume that the size will never be beyond the maximum size set// this is not in general TRUE, but in practice it's good enough for// this program<a name="x1878"></a>void LifeWidget::<a href="qframe.html#resizeEvent">resizeEvent</a>( <a href="qresizeevent.html">QResizeEvent</a> * e ){<a name="x1884"></a>    maxi = (e-&gt;<a href="qresizeevent.html#size">size</a>().width()  - 2 * BORDER) / SCALE;    maxj = (e-&gt;<a href="qresizeevent.html#size">size</a>().height() - 2 * BORDER) / SCALE;}void <a name="f518"></a>LifeWidget::setPoint( int i, int j ){    if ( i &lt; 1 || i &gt; maxi || j &lt; 1 || j &gt; maxi )        return;    cells[current][i][j] = TRUE;    <a href="qwidget.html#repaint">repaint</a>( index2pos(i), index2pos(j), SCALE, SCALE, FALSE );}void <a name="f519"></a>LifeWidget::mouseHandle( const <a href="qpoint.html">QPoint</a> &amp;pos ){<a name="x1882"></a>    int i = pos2index( pos.<a href="qpoint.html#x">x</a>() );<a name="x1883"></a>    int j = pos2index( pos.<a href="qpoint.html#y">y</a>() );    setPoint( i, j );}<a name="x1885"></a>void LifeWidget::<a href="qwidget.html#mouseMoveEvent">mouseMoveEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> *e ){<a name="x1880"></a>    mouseHandle( e-&gt;<a href="qmouseevent.html#pos">pos</a>() );}<a name="x1886"></a>void LifeWidget::<a href="qwidget.html#mousePressEvent">mousePressEvent</a>( <a href="qmouseevent.html">QMouseEvent</a> *e ){<a name="x1879"></a>    if ( e-&gt;<a href="qmouseevent.html#button">button</a>() == QMouseEvent::LeftButton )        mouseHandle( e-&gt;<a href="qmouseevent.html#pos">pos</a>() );}void <a name="f520"></a>LifeWidget::nextGeneration(){    for ( int i = 1; i &lt;= MAXSIZE; i++ ) {        for ( int j = 1; j &lt;= MAXSIZE; j++ ) {            int t = cells[current][i - 1][j - 1]            + cells[current][i - 1][j]            + cells[current][i - 1][j + 1]            + cells[current][i][j - 1]            + cells[current][i][j + 1]            + cells[current][i + 1][j - 1]            + cells[current][i + 1][j]            + cells[current][i + 1][j + 1];            cells[!current][i][j] = ( t == 3 ||                                      t == 2 &amp;&amp; cells[current][i][j] );        }    }    current = !current;    <a href="qwidget.html#repaint">repaint</a>( FALSE );           // repaint without erase}<a name="x1877"></a>void LifeWidget::<a href="qframe.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">QPaintEvent</a> * e ){<a name="x1881"></a>    int starti = pos2index( e-&gt;<a href="qpaintevent.html#rect">rect</a>().left() );    int stopi  = pos2index( e-&gt;<a href="qpaintevent.html#rect">rect</a>().right() );    int startj = pos2index( e-&gt;<a href="qpaintevent.html#rect">rect</a>().top() );    int stopj  = pos2index( e-&gt;<a href="qpaintevent.html#rect">rect</a>().bottom() );    if (stopi &gt; maxi)        stopi = maxi;    if (stopj &gt; maxj)        stopj = maxj;    <a href="qpainter.html">QPainter</a> paint( this );    for ( int i = starti; i &lt;= stopi; i++ ) {        for ( int j = startj; j &lt;= stopj; j++ ) {            if ( cells[current][i][j] )                <a href="qpainter.html#qDrawShadePanel">qDrawShadePanel</a>( &amp;paint, index2pos( i ), index2pos( j ),                                 SCALE - 1, SCALE - 1, colorGroup() );            else if ( cells[!current][i][j] )                <a href="qwidget.html#erase">erase</a>(index2pos( i ), index2pos( j ), SCALE - 1, SCALE - 1);        }    }    <a href="qframe.html#drawFrame">drawFrame</a>( &amp;paint );}</pre><p> <hr><p> Main:<p> <pre>/****************************************************************************** $Id:  qt/main.cpp   3.0.5   edited Oct 12 2001 $**** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.**** This file is part of an example program for Qt.  This example** program may be used, distributed and modified without limitation.*******************************************************************************/#include "lifedlg.h"#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;#include &lt;stdlib.h&gt;void usage(){    <a href="qapplication.html#qWarning">qWarning</a>( "Usage: life [-scale scale]" );}int main( int argc, char **argv ){    <a href="qapplication.html">QApplication</a> a( argc, argv );    int scale = 10;    for ( int i = 1; i &lt; argc; i++ ){        <a href="qstring.html">QString</a> arg = argv[i];        if ( arg == "-scale" )            scale = atoi( argv[++i] );        else {            usage();            exit(1);        }    }    if ( scale &lt; 2 )        scale = 2;    LifeDialog *life = new LifeDialog( scale );    a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( life );    life-&gt;<a href="qwidget.html#setCaption">setCaption</a>("Qt Example - Life");    life-&gt;<a href="qwidget.html#show">show</a>();    return a.<a href="qapplication.html#exec">exec</a>();}</pre><p>See also <a href="examples.html">Examples</a>.<!-- eof --><p><address><hr><div align=center><table width=100% cellspacing=0 border=0><tr><td>Copyright &copy; 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a><td align=right><div align=right>Qt version 3.0.5</div></table></div></address></body></html>
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