source: trunk/doc/html/chart-element-cpp.html

Last change on this file was 190, checked in by rudi, 14 years ago

reference documentation added
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32<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>
33
34
35<pre>#include "element.h"
36
37#include &lt;<a href="qstringlist-h.html">qstringlist.h</a>&gt;
38#include &lt;<a href="qtextstream-h.html">qtextstream.h</a>&gt;
39
40const char FIELD_SEP = ':';
41const char PROPOINT_SEP = ';';
42const char XY_SEP = ',';
43
44
45void Element::init( double value, QColor valueColor, int valuePattern,
46 const <a href="qstring.html">QString</a>&amp; label, QColor labelColor )
47{
48 m_value = value;
49 m_valueColor = valueColor;
50 if ( valuePattern &lt; Qt::SolidPattern || valuePattern &gt; Qt::DiagCrossPattern )
51 valuePattern = Qt::SolidPattern;
52 m_valuePattern = valuePattern;
53 m_label = label;
54 m_labelColor = labelColor;
55}
56
57
58void Element::setValuePattern( int valuePattern )
59{
60 if ( valuePattern &lt; Qt::SolidPattern || valuePattern &gt; Qt::DiagCrossPattern )
61 valuePattern = Qt::SolidPattern;
62 m_valuePattern = valuePattern;
63}
64
65
66double Element::proX( int index ) const
67{
68 <a href="qapplication.html#Q_ASSERT">Q_ASSERT</a>(index &gt;= 0 &amp;&amp; index &lt; MAX_PROPOINTS);
69 return m_propoints[2 * index];
70}
71
72
73double Element::proY( int index ) const
74{
75 <a href="qapplication.html#Q_ASSERT">Q_ASSERT</a>(index &gt;= 0 &amp;&amp; index &lt; MAX_PROPOINTS);
76 return m_propoints[(2 * index) + 1];
77}
78
79
80void Element::setProX( int index, double value )
81{
82 <a href="qapplication.html#Q_ASSERT">Q_ASSERT</a>(index &gt;= 0 &amp;&amp; index &lt; MAX_PROPOINTS);
83 m_propoints[2 * index] = value;
84}
85
86
87void Element::setProY( int index, double value )
88{
89 <a href="qapplication.html#Q_ASSERT">Q_ASSERT</a>(index &gt;= 0 &amp;&amp; index &lt; MAX_PROPOINTS);
90 m_propoints[(2 * index) + 1] = value;
91}
92
93
94QTextStream &amp;operator&lt;&lt;( <a href="qtextstream.html">QTextStream</a> &amp;s, const Element &amp;element )
95{
96 s &lt;&lt; element.value() &lt;&lt; FIELD_SEP
97 &lt;&lt; element.valueColor().name() &lt;&lt; FIELD_SEP
98 &lt;&lt; element.valuePattern() &lt;&lt; FIELD_SEP
99 &lt;&lt; element.labelColor().name() &lt;&lt; FIELD_SEP;
100
101 for ( int i = 0; i &lt; Element::MAX_PROPOINTS; ++i ) {
102 s &lt;&lt; element.proX( i ) &lt;&lt; XY_SEP &lt;&lt; element.proY( i );
103 s &lt;&lt; ( i == Element::MAX_PROPOINTS - 1 ? FIELD_SEP : PROPOINT_SEP );
104 }
105
106 s &lt;&lt; element.label() &lt;&lt; '\n';
107
108 return s;
109}
110
111
112QTextStream &amp;operator&gt;&gt;( <a href="qtextstream.html">QTextStream</a> &amp;s, Element &amp;element )
113{
114 <a href="qstring.html">QString</a> data = s.<a href="qtextstream.html#readLine">readLine</a>();
115 element.setValue( Element::INVALID );
116
117 int errors = 0;
118 bool ok;
119
120 <a href="qstringlist.html">QStringList</a> fields = QStringList::<a href="qstringlist.html#split">split</a>( FIELD_SEP, data );
121 if ( fields.<a href="qvaluelist.html#count">count</a>() &gt;= 4 ) {
122 double value = fields[0].toDouble( &amp;ok );
123 if ( !ok )
124 errors++;
125 <a href="qcolor.html">QColor</a> valueColor = QColor( fields[1] );
126 if ( !valueColor.<a href="qcolor.html#isValid">isValid</a>() )
127 errors++;
128 int valuePattern = fields[2].toInt( &amp;ok );
129 if ( !ok )
130 errors++;
131 <a href="qcolor.html">QColor</a> labelColor = QColor( fields[3] );
132 if ( !labelColor.<a href="qcolor.html#isValid">isValid</a>() )
133 errors++;
134 <a href="qstringlist.html">QStringList</a> propoints = QStringList::<a href="qstringlist.html#split">split</a>( PROPOINT_SEP, fields[4] );
135 <a href="qstring.html">QString</a> label = data.<a href="qstring.html#section">section</a>( FIELD_SEP, 5 );
136
137 if ( !errors ) {
138 element.set( value, valueColor, valuePattern, label, labelColor );
139 int i = 0;
140 for ( QStringList::iterator point = propoints.<a href="qvaluelist.html#begin">begin</a>();
141 i &lt; Element::MAX_PROPOINTS &amp;&amp; point != propoints.<a href="qvaluelist.html#end">end</a>();
142 ++i, ++point ) {
143 errors = 0;
144 <a href="qstringlist.html">QStringList</a> xy = QStringList::<a href="qstringlist.html#split">split</a>( XY_SEP, *point );
145 double x = xy[0].toDouble( &amp;ok );
146 if ( !ok || x &lt;= 0.0 || x &gt;= 1.0 )
147 errors++;
148 double y = xy[1].toDouble( &amp;ok );
149 if ( !ok || y &lt;= 0.0 || y &gt;= 1.0 )
150 errors++;
151 if ( errors )
152 x = y = Element::NO_PROPORTION;
153 element.setProX( i, x );
154 element.setProY( i, y );
155 }
156 }
157 }
158
159 return s;
160}
161
162</pre><!-- eof -->
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