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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Wt: Wt::Chart::WChartPalette Class Reference</title>
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<div class="navpath"><a class="el" href="namespaceWt.html">Wt</a>::<a class="el" href="namespaceWt_1_1Chart.html">Chart</a>::<a class="el" href="classWt_1_1Chart_1_1WChartPalette.html">WChartPalette</a>
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<div class="contents">
<h1>Wt::Chart::WChartPalette Class Reference<br>
<small>
[<a class="el" href="group__charts.html">Chart library</a>]</small>
</h1><!-- doxytag: class="Wt::Chart::WChartPalette" -->Abstract base class for styling rendered data series in charts.
<a href="#_details">More...</a>
<p>
<code>#include <Wt/Chart/WChartPalette></code>
<p>
<div class="dynheader">
Inheritance diagram for Wt::Chart::WChartPalette:</div>
<div class="dynsection">
<p><center><img src="classWt_1_1Chart_1_1WChartPalette__inherit__graph.png" border="0" usemap="#Wt_1_1Chart_1_1WChartPalette__inherit__map" alt="Inheritance graph"></center>
<map name="Wt_1_1Chart_1_1WChartPalette__inherit__map">
<area shape="rect" href="classWt_1_1Chart_1_1WStandardPalette.html" title="Standard styling for rendering series in charts." alt="" coords="5,80,195,107"></map>
<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center></div>
<p>
<a href="classWt_1_1Chart_1_1WChartPalette-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="72e713c7e44024ebc5044bd2c67a3812"></a><!-- doxytag: member="Wt::Chart::WChartPalette::~WChartPalette" ref="72e713c7e44024ebc5044bd2c67a3812" args="()" -->
virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Chart_1_1WChartPalette.html#72e713c7e44024ebc5044bd2c67a3812">~WChartPalette</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Destructor. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="classWt_1_1WBrush.html">WBrush</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Chart_1_1WChartPalette.html#a7e88bb175f4f83b245076150e658e99">brush</a> (int index) const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns a brush from the palette. <a href="#a7e88bb175f4f83b245076150e658e99"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="classWt_1_1WPen.html">WPen</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Chart_1_1WChartPalette.html#770025513b0e83146d54011743950726">borderPen</a> (int index) const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns a border pen from the palette. <a href="#770025513b0e83146d54011743950726"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="classWt_1_1WPen.html">WPen</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Chart_1_1WChartPalette.html#b395b91af20d3171c0cbb0abca85d967">strokePen</a> (int index) const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns a stroke pen from the palette. <a href="#b395b91af20d3171c0cbb0abca85d967"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="classWt_1_1WColor.html">WColor</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1Chart_1_1WChartPalette.html#4968d1f875e0aedac02d7dbc312d085f">fontColor</a> (int index) const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns a font color from the palette. <a href="#4968d1f875e0aedac02d7dbc312d085f"></a><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Abstract base class for styling rendered data series in charts.
<p>
This class provides an interface for a palette which sets strokes and fill strokes for data in a <a class="el" href="classWt_1_1Chart_1_1WAbstractChart.html">chart</a>. A palette is an ordered list of styles, which is indexed by the chart to get a suitable style for a particular series (in case of <a class="el" href="classWt_1_1Chart_1_1WCartesianChart.html" title="A cartesian chart.">WCartesianChart</a>) or data row (in case of <a class="el" href="classWt_1_1Chart_1_1WPieChart.html" title="A pie chart.">WPieChart</a>). Each style is defined by a brush, two pen styles (one for borders, and one for plain lines), and a font color that is appropriate for drawing text within the brushed area.<p>
To use a custom palette, you should reimplement this class, and then use <a class="el" href="classWt_1_1Chart_1_1WAbstractChart.html#044936e6358c8efc55699effc4b946d8" title="Set a palette for the chart.">WAbstractChart::setPalette()</a> to use an instance of the palette. <hr><h2>Member Function Documentation</h2>
<a class="anchor" name="a7e88bb175f4f83b245076150e658e99"></a><!-- doxytag: member="Wt::Chart::WChartPalette::brush" ref="a7e88bb175f4f83b245076150e658e99" args="(int index) const =0" -->
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<td class="memname">virtual <a class="el" href="classWt_1_1WBrush.html">WBrush</a> Wt::Chart::WChartPalette::brush </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>index</em> </td>
<td> ) </td>
<td> const<code> [pure virtual]</code></td>
</tr>
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<p>
Returns a brush from the palette.
<p>
Returns the brush for the style with given <em>index</em>.
<p>Implemented in <a class="el" href="classWt_1_1Chart_1_1WStandardPalette.html#43791f6f18e2986809d9ae8f062fc76e">Wt::Chart::WStandardPalette</a>.</p>
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<a class="anchor" name="770025513b0e83146d54011743950726"></a><!-- doxytag: member="Wt::Chart::WChartPalette::borderPen" ref="770025513b0e83146d54011743950726" args="(int index) const =0" -->
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<td class="memname">virtual <a class="el" href="classWt_1_1WPen.html">WPen</a> Wt::Chart::WChartPalette::borderPen </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>index</em> </td>
<td> ) </td>
<td> const<code> [pure virtual]</code></td>
</tr>
</table>
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<div class="memdoc">
<p>
Returns a border pen from the palette.
<p>
Returns the pen for stroking borders around an area filled using the brush at the same <em>index</em>.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1Chart_1_1WChartPalette.html#b395b91af20d3171c0cbb0abca85d967" title="Returns a stroke pen from the palette.">strokePen()</a>, <a class="el" href="classWt_1_1Chart_1_1WChartPalette.html#a7e88bb175f4f83b245076150e658e99" title="Returns a brush from the palette.">brush()</a> </dd></dl>
<p>Implemented in <a class="el" href="classWt_1_1Chart_1_1WStandardPalette.html#94ea33302229bc7ae115567ffb9acee4">Wt::Chart::WStandardPalette</a>.</p>
</div>
</div><p>
<a class="anchor" name="b395b91af20d3171c0cbb0abca85d967"></a><!-- doxytag: member="Wt::Chart::WChartPalette::strokePen" ref="b395b91af20d3171c0cbb0abca85d967" args="(int index) const =0" -->
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<td class="memname">virtual <a class="el" href="classWt_1_1WPen.html">WPen</a> Wt::Chart::WChartPalette::strokePen </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>index</em> </td>
<td> ) </td>
<td> const<code> [pure virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Returns a stroke pen from the palette.
<p>
Returns the pen for stroking lines for the style with given <em>index</em>.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1Chart_1_1WChartPalette.html#b395b91af20d3171c0cbb0abca85d967" title="Returns a stroke pen from the palette.">strokePen()</a> </dd></dl>
<p>Implemented in <a class="el" href="classWt_1_1Chart_1_1WStandardPalette.html#e8465be7c23762aef801707a48df862e">Wt::Chart::WStandardPalette</a>.</p>
</div>
</div><p>
<a class="anchor" name="4968d1f875e0aedac02d7dbc312d085f"></a><!-- doxytag: member="Wt::Chart::WChartPalette::fontColor" ref="4968d1f875e0aedac02d7dbc312d085f" args="(int index) const =0" -->
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<td class="memname">virtual <a class="el" href="classWt_1_1WColor.html">WColor</a> Wt::Chart::WChartPalette::fontColor </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>index</em> </td>
<td> ) </td>
<td> const<code> [pure virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Returns a font color from the palette.
<p>
Returns a font color suitable for rendering text in the area filled with the brush at the same <em>index</em>.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1Chart_1_1WChartPalette.html#a7e88bb175f4f83b245076150e658e99" title="Returns a brush from the palette.">brush()</a> </dd></dl>
<p>Implemented in <a class="el" href="classWt_1_1Chart_1_1WStandardPalette.html#980f085213550e9ae1365416cd385061">Wt::Chart::WStandardPalette</a>.</p>
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