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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<title>chart/element.cpp Example File</title>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>chart/element.cpp Example File</h1>

 
<pre>#include "element.h"

#include &lt;<a href="qstringlist-h.html">qstringlist.h</a>&gt;
#include &lt;<a href="qtextstream-h.html">qtextstream.h</a>&gt;

const char FIELD_SEP = ':';
const char PROPOINT_SEP = ';';
const char XY_SEP = ',';


void Element::init( double value, QColor valueColor, int valuePattern,
                    const <a href="qstring.html">QString</a>&amp; label, QColor labelColor )
{
    m_value = value;
    m_valueColor = valueColor;
    if ( valuePattern &lt; Qt::SolidPattern || valuePattern &gt; Qt::DiagCrossPattern )
        valuePattern = Qt::SolidPattern;
    m_valuePattern = valuePattern;
    m_label = label;
    m_labelColor = labelColor;
}


void Element::setValuePattern( int valuePattern )
{
    if ( valuePattern &lt; Qt::SolidPattern || valuePattern &gt; Qt::DiagCrossPattern )
        valuePattern = Qt::SolidPattern;
    m_valuePattern = valuePattern;
}


double Element::proX( int index ) const
{
    <a href="qapplication.html#Q_ASSERT">Q_ASSERT</a>(index &gt;= 0 &amp;&amp; index &lt; MAX_PROPOINTS);
    return m_propoints[2 * index];
}


double Element::proY( int index ) const
{
    <a href="qapplication.html#Q_ASSERT">Q_ASSERT</a>(index &gt;= 0 &amp;&amp; index &lt; MAX_PROPOINTS);
    return m_propoints[(2 * index) + 1];
}


void Element::setProX( int index, double value )
{
    <a href="qapplication.html#Q_ASSERT">Q_ASSERT</a>(index &gt;= 0 &amp;&amp; index &lt; MAX_PROPOINTS);
    m_propoints[2 * index] = value;
}


void Element::setProY( int index, double value )
{
    <a href="qapplication.html#Q_ASSERT">Q_ASSERT</a>(index &gt;= 0 &amp;&amp; index &lt; MAX_PROPOINTS);
    m_propoints[(2 * index) + 1] = value;
}


QTextStream &amp;operator&lt;&lt;( <a href="qtextstream.html">QTextStream</a> &amp;s, const Element &amp;element )
{
    s &lt;&lt; element.value() &lt;&lt; FIELD_SEP
      &lt;&lt; element.valueColor().name() &lt;&lt; FIELD_SEP
      &lt;&lt; element.valuePattern() &lt;&lt; FIELD_SEP
      &lt;&lt; element.labelColor().name() &lt;&lt; FIELD_SEP;

    for ( int i = 0; i &lt; Element::MAX_PROPOINTS; ++i ) {
        s &lt;&lt; element.proX( i ) &lt;&lt; XY_SEP &lt;&lt; element.proY( i );
        s &lt;&lt; ( i == Element::MAX_PROPOINTS - 1 ? FIELD_SEP : PROPOINT_SEP );
    }

    s &lt;&lt; element.label() &lt;&lt; '\n';

    return s;
}


QTextStream &amp;operator&gt;&gt;( <a href="qtextstream.html">QTextStream</a> &amp;s, Element &amp;element )
{
    <a href="qstring.html">QString</a> data = s.<a href="qtextstream.html#readLine">readLine</a>();
    element.setValue( Element::INVALID );

    int errors = 0;
    bool ok;

    <a href="qstringlist.html">QStringList</a> fields = QStringList::<a href="qstringlist.html#split">split</a>( FIELD_SEP, data );
    if ( fields.<a href="qvaluelist.html#count">count</a>() &gt;= 4 ) {
        double value = fields[0].toDouble( &amp;ok );
        if ( !ok )
            errors++;
        <a href="qcolor.html">QColor</a> valueColor = QColor( fields[1] );
        if ( !valueColor.<a href="qcolor.html#isValid">isValid</a>() )
            errors++;
        int valuePattern = fields[2].toInt( &amp;ok );
        if ( !ok )
            errors++;
        <a href="qcolor.html">QColor</a> labelColor = QColor( fields[3] );
        if ( !labelColor.<a href="qcolor.html#isValid">isValid</a>() )
            errors++;
        <a href="qstringlist.html">QStringList</a> propoints = QStringList::<a href="qstringlist.html#split">split</a>( PROPOINT_SEP, fields[4] );
        <a href="qstring.html">QString</a> label = data.<a href="qstring.html#section">section</a>( FIELD_SEP, 5 );

        if ( !errors ) {
            element.set( value, valueColor, valuePattern, label, labelColor );
            int i = 0;
            for ( QStringList::iterator point = propoints.<a href="qvaluelist.html#begin">begin</a>();
                i &lt; Element::MAX_PROPOINTS &amp;&amp; point != propoints.<a href="qvaluelist.html#end">end</a>();
                ++i, ++point ) {
                errors = 0;
                <a href="qstringlist.html">QStringList</a> xy = QStringList::<a href="qstringlist.html#split">split</a>( XY_SEP, *point );
                double x = xy[0].toDouble( &amp;ok );
                if ( !ok || x &lt;= 0.0 || x &gt;= 1.0 )
                    errors++;
                double y = xy[1].toDouble( &amp;ok );
                if ( !ok || y &lt;= 0.0 || y &gt;= 1.0 )
                    errors++;
                if ( errors )
                    x = y = Element::NO_PROPORTION;
                element.setProX( i, x );
                element.setProY( i, y );
            }
        }
    }

    return s;
}

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