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170 lines
6.1 KiB
170 lines
6.1 KiB
14 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/tutorial2.doc:3 -->
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>chart/element.cpp Example File</title>
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fn { margin-left: 1cm; text-indent: -1cm; }
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Main Classes</font></a>
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<font color="#004faf">Grouped Classes</font></a>
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<font color="#004faf">Functions</font></a>
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</td>
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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>
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<pre>#include "element.h"
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#include <<a href="qstringlist-h.html">qstringlist.h</a>>
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#include <<a href="qtextstream-h.html">qtextstream.h</a>>
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const char FIELD_SEP = ':';
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const char PROPOINT_SEP = ';';
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const char XY_SEP = ',';
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void Element::init( double value, QColor valueColor, int valuePattern,
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const <a href="qstring.html">QString</a>& label, QColor labelColor )
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{
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m_value = value;
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m_valueColor = valueColor;
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if ( valuePattern < Qt::SolidPattern || valuePattern > Qt::DiagCrossPattern )
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valuePattern = Qt::SolidPattern;
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m_valuePattern = valuePattern;
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m_label = label;
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m_labelColor = labelColor;
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}
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void Element::setValuePattern( int valuePattern )
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{
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if ( valuePattern < Qt::SolidPattern || valuePattern > Qt::DiagCrossPattern )
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valuePattern = Qt::SolidPattern;
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m_valuePattern = valuePattern;
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}
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double Element::proX( int index ) const
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{
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<a href="qapplication.html#Q_ASSERT">Q_ASSERT</a>(index >= 0 && index < MAX_PROPOINTS);
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return m_propoints[2 * index];
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}
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double Element::proY( int index ) const
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{
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<a href="qapplication.html#Q_ASSERT">Q_ASSERT</a>(index >= 0 && index < MAX_PROPOINTS);
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return m_propoints[(2 * index) + 1];
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}
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void Element::setProX( int index, double value )
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{
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<a href="qapplication.html#Q_ASSERT">Q_ASSERT</a>(index >= 0 && index < MAX_PROPOINTS);
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m_propoints[2 * index] = value;
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}
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void Element::setProY( int index, double value )
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{
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<a href="qapplication.html#Q_ASSERT">Q_ASSERT</a>(index >= 0 && index < MAX_PROPOINTS);
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m_propoints[(2 * index) + 1] = value;
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}
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QTextStream &operator<<( <a href="qtextstream.html">QTextStream</a> &s, const Element &element )
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{
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s << element.value() << FIELD_SEP
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<< element.valueColor().name() << FIELD_SEP
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<< element.valuePattern() << FIELD_SEP
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<< element.labelColor().name() << FIELD_SEP;
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for ( int i = 0; i < Element::MAX_PROPOINTS; ++i ) {
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s << element.proX( i ) << XY_SEP << element.proY( i );
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s << ( i == Element::MAX_PROPOINTS - 1 ? FIELD_SEP : PROPOINT_SEP );
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}
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s << element.label() << '\n';
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return s;
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}
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QTextStream &operator>>( <a href="qtextstream.html">QTextStream</a> &s, Element &element )
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{
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<a href="qstring.html">QString</a> data = s.<a href="qtextstream.html#readLine">readLine</a>();
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element.setValue( Element::INVALID );
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int errors = 0;
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bool ok;
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<a href="qstringlist.html">QStringList</a> fields = QStringList::<a href="qstringlist.html#split">split</a>( FIELD_SEP, data );
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if ( fields.<a href="qvaluelist.html#count">count</a>() >= 4 ) {
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double value = fields[0].toDouble( &ok );
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if ( !ok )
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errors++;
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<a href="qcolor.html">QColor</a> valueColor = QColor( fields[1] );
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if ( !valueColor.<a href="qcolor.html#isValid">isValid</a>() )
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errors++;
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int valuePattern = fields[2].toInt( &ok );
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if ( !ok )
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errors++;
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<a href="qcolor.html">QColor</a> labelColor = QColor( fields[3] );
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if ( !labelColor.<a href="qcolor.html#isValid">isValid</a>() )
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errors++;
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<a href="qstringlist.html">QStringList</a> propoints = QStringList::<a href="qstringlist.html#split">split</a>( PROPOINT_SEP, fields[4] );
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<a href="qstring.html">QString</a> label = data.<a href="qstring.html#section">section</a>( FIELD_SEP, 5 );
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if ( !errors ) {
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element.set( value, valueColor, valuePattern, label, labelColor );
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int i = 0;
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for ( QStringList::iterator point = propoints.<a href="qvaluelist.html#begin">begin</a>();
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i < Element::MAX_PROPOINTS && point != propoints.<a href="qvaluelist.html#end">end</a>();
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++i, ++point ) {
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errors = 0;
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<a href="qstringlist.html">QStringList</a> xy = QStringList::<a href="qstringlist.html#split">split</a>( XY_SEP, *point );
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double x = xy[0].toDouble( &ok );
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if ( !ok || x <= 0.0 || x >= 1.0 )
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errors++;
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double y = xy[1].toDouble( &ok );
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if ( !ok || y <= 0.0 || y >= 1.0 )
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errors++;
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if ( errors )
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x = y = Element::NO_PROPORTION;
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element.setProX( i, x );
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element.setProY( i, y );
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}
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}
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}
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return s;
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}
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</pre><!-- eof -->
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<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>Qt 3.3.8</div>
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</table></div></address></body>
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</html>
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