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<h1>QwtAbstractScaleDraw Class Reference</h1> </div>
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<!-- doxytag: class="QwtAbstractScaleDraw" -->
<p>A abstract base class for drawing scales.
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="qwt__abstract__scale__draw_8h_source.html">qwt_abstract_scale_draw.h</a>></code></p>
<div class="dynheader">
Inheritance diagram for QwtAbstractScaleDraw:</div>
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<div class="center"><img src="class_qwt_abstract_scale_draw__inherit__graph.png" border="0" usemap="#_qwt_abstract_scale_draw_inherit__map" alt="Inheritance graph"/></div>
<map name="_qwt_abstract_scale_draw_inherit__map" id="_qwt_abstract_scale_draw_inherit__map">
<area shape="rect" id="node3" href="class_qwt_round_scale_draw.html" title="A class for drawing round scales." alt="" coords="5,83,149,112"/><area shape="rect" id="node7" href="class_qwt_scale_draw.html" title="A class for drawing scales." alt="" coords="173,83,280,112"/><area shape="rect" id="node5" href="class_qwt_dial_scale_draw.html" title="A special scale draw made for QwtDial." alt="" coords="13,160,141,189"/></map>
<center><span class="legend">[<a href="graph_legend.html">legend</a>]</span></center></div>
<p><a href="class_qwt_abstract_scale_draw-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a26215d06a4d48adf401d0aa05d4193c5">ScaleComponent</a> { <br/>
  <a class="el" href="class_qwt_abstract_scale_draw.html#a26215d06a4d48adf401d0aa05d4193c5a61a6c4f4dec2b089edfb655e2b21c3a2">Backbone</a> = 0x01,
<br/>
  <a class="el" href="class_qwt_abstract_scale_draw.html#a26215d06a4d48adf401d0aa05d4193c5a1f23d080ce1229a0c4f70469e88acce0">Ticks</a> = 0x02,
<br/>
  <a class="el" href="class_qwt_abstract_scale_draw.html#a26215d06a4d48adf401d0aa05d4193c5ad2709d7efbb6f1618f0a8a3b6cafae96">Labels</a> = 0x04
<br/>
}</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">typedef QFlags< <a class="el" href="class_qwt_abstract_scale_draw.html#a26215d06a4d48adf401d0aa05d4193c5">ScaleComponent</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a0dd3ccdfa074fb6b1781b84ed2a4729a">ScaleComponents</a></td></tr>
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#aca3c3a7499112f52616d0ee8518fa5a6">draw</a> (QPainter *, const QPalette &) const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#af975410588db6103f281e49d0b43c6a6">enableComponent</a> (<a class="el" href="class_qwt_abstract_scale_draw.html#a26215d06a4d48adf401d0aa05d4193c5">ScaleComponent</a>, bool enable=true)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a1ac28ff3f13123bc6b67223a368c096f">extent</a> (const QFont &) const =0</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a95d74d9eaa5520754295efb33a4db50f">hasComponent</a> (<a class="el" href="class_qwt_abstract_scale_draw.html#a26215d06a4d48adf401d0aa05d4193c5">ScaleComponent</a>) const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="class_qwt_text.html">QwtText</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a4ff88bc827dd6c6ca9298de13483b61f">label</a> (double) const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#afac6ad0e98fefd9d103366726542a055">maxTickLength</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a563f102ef1370ecdfdc47133fb0c78ec">minimumExtent</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a8933b8da6332a6d4badfa83e67b74865">penWidth</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a19c944664a2e36f06ae71b745fbd442e">QwtAbstractScaleDraw</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const <a class="el" href="class_qwt_scale_div.html">QwtScaleDiv</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a82510027cd5bee269628c9d6302a19a9">scaleDiv</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const <a class="el" href="class_qwt_scale_map.html">QwtScaleMap</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#aac87f593525666a47a57d9e2b4f02c66">scaleMap</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_qwt_scale_map.html">QwtScaleMap</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#ae7488eb63ad73a2e69acb29ff069c904">scaleMap</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#ac174255c334b995ca010a6964597d5f2">setMinimumExtent</a> (double)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a098e1f813077c9bb0c5f83266035943a">setPenWidth</a> (int width)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a4399aac94a294f5ed6c52114dde00d2f">setScaleDiv</a> (const <a class="el" href="class_qwt_scale_div.html">QwtScaleDiv</a> &s)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#ae5bdaadb303510f7eb9dbec5c52f7a47">setSpacing</a> (double margin)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a7fed388e435aae791d61f48cc9ddf632">setTickLength</a> (<a class="el" href="class_qwt_scale_div.html#af21aedaa886dd5e067cf63505838736c">QwtScaleDiv::TickType</a>, double length)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a0011367eb32519070e6f276ac393dcfb">setTransformation</a> (<a class="el" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a> *)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a93561d85e879402086f2607e45e89cc2">spacing</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#aa43034f7ad87c33e9790c730ed48c55d">tickLength</a> (<a class="el" href="class_qwt_scale_div.html#af21aedaa886dd5e067cf63505838736c">QwtScaleDiv::TickType</a>) const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#adc4d3f491b28ee39d728a4a4a9cdd494">~QwtAbstractScaleDraw</a> ()</td></tr>
<tr><td colspan="2"><h2><a name="pro-methods"></a>
Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a15994a6033e689c3acdb8d83ae4f2a1c">drawBackbone</a> (QPainter *painter) const =0</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#aa78dc8bf05a0224450c947af54128d8d">drawLabel</a> (QPainter *painter, double value) const =0</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a31791e80bf07d23adbe500740aac5a58">drawTick</a> (QPainter *painter, double value, double len) const =0</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a4ed95cd23c5d779c1b05aa5295409aa6">invalidateCache</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const <a class="el" href="class_qwt_text.html">QwtText</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a5e703dcb115a51024f89f92e61c2c8d8">tickLabel</a> (const QFont &, double value) const </td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>A abstract base class for drawing scales. </p>
<p><a class="el" href="class_qwt_abstract_scale_draw.html" title="A abstract base class for drawing scales.">QwtAbstractScaleDraw</a> can be used to draw linear or logarithmic scales.</p>
<p>After a scale division has been specified as a <a class="el" href="class_qwt_scale_div.html" title="A class representing a scale division.">QwtScaleDiv</a> object using <a class="el" href="class_qwt_abstract_scale_draw.html#a4399aac94a294f5ed6c52114dde00d2f">QwtAbstractScaleDraw::setScaleDiv(const QwtScaleDiv &s)</a>, the scale can be drawn with the <a class="el" href="class_qwt_abstract_scale_draw.html#aca3c3a7499112f52616d0ee8518fa5a6" title="Draw the scale.">QwtAbstractScaleDraw::draw()</a> member. </p>
</div><hr/><h2>Member Typedef Documentation</h2>
<a class="anchor" id="a0dd3ccdfa074fb6b1781b84ed2a4729a"></a><!-- doxytag: member="QwtAbstractScaleDraw::ScaleComponents" ref="a0dd3ccdfa074fb6b1781b84ed2a4729a" args="" -->
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<td class="memname">typedef QFlags<<a class="el" href="class_qwt_abstract_scale_draw.html#a26215d06a4d48adf401d0aa05d4193c5">ScaleComponent</a>> <a class="el" href="class_qwt_abstract_scale_draw.html#a0dd3ccdfa074fb6b1781b84ed2a4729a">QwtAbstractScaleDraw::ScaleComponents</a></td>
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<p>Scale components. </p>
</div>
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<hr/><h2>Member Enumeration Documentation</h2>
<a class="anchor" id="a26215d06a4d48adf401d0aa05d4193c5"></a><!-- doxytag: member="QwtAbstractScaleDraw::ScaleComponent" ref="a26215d06a4d48adf401d0aa05d4193c5" args="" -->
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<td class="memname">enum <a class="el" href="class_qwt_abstract_scale_draw.html#a26215d06a4d48adf401d0aa05d4193c5">QwtAbstractScaleDraw::ScaleComponent</a></td>
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<div class="memdoc">
<p>Components of a scale </p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#af975410588db6103f281e49d0b43c6a6">enableComponent()</a>, <a class="el" href="class_qwt_abstract_scale_draw.html#a95d74d9eaa5520754295efb33a4db50f">hasComponent</a> </dd></dl>
<dl><dt><b>Enumerator: </b></dt><dd><table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" id="a26215d06a4d48adf401d0aa05d4193c5a61a6c4f4dec2b089edfb655e2b21c3a2"></a><!-- doxytag: member="Backbone" ref="a26215d06a4d48adf401d0aa05d4193c5a61a6c4f4dec2b089edfb655e2b21c3a2" args="" -->Backbone</em> </td><td>
<p>Backbone = the line where the ticks are located. </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="a26215d06a4d48adf401d0aa05d4193c5a1f23d080ce1229a0c4f70469e88acce0"></a><!-- doxytag: member="Ticks" ref="a26215d06a4d48adf401d0aa05d4193c5a1f23d080ce1229a0c4f70469e88acce0" args="" -->Ticks</em> </td><td>
<p>Ticks. </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="a26215d06a4d48adf401d0aa05d4193c5ad2709d7efbb6f1618f0a8a3b6cafae96"></a><!-- doxytag: member="Labels" ref="a26215d06a4d48adf401d0aa05d4193c5ad2709d7efbb6f1618f0a8a3b6cafae96" args="" -->Labels</em> </td><td>
<p>Labels. </p>
</td></tr>
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</dd>
</dl>
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<hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="a19c944664a2e36f06ae71b745fbd442e"></a><!-- doxytag: member="QwtAbstractScaleDraw::QwtAbstractScaleDraw" ref="a19c944664a2e36f06ae71b745fbd442e" args="()" -->
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<td class="memname">QwtAbstractScaleDraw::QwtAbstractScaleDraw </td>
<td>(</td>
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<p>Constructor. </p>
<p>The range of the scale is initialized to [0, 100], The spacing (distance between ticks and labels) is set to 4, the tick lengths are set to 4,6 and 8 pixels </p>
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<a class="anchor" id="adc4d3f491b28ee39d728a4a4a9cdd494"></a><!-- doxytag: member="QwtAbstractScaleDraw::~QwtAbstractScaleDraw" ref="adc4d3f491b28ee39d728a4a4a9cdd494" args="()" -->
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<td class="memname">QwtAbstractScaleDraw::~QwtAbstractScaleDraw </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [virtual]</code></td>
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<div class="memdoc">
<p>Destructor. </p>
</div>
</div>
<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="aca3c3a7499112f52616d0ee8518fa5a6"></a><!-- doxytag: member="QwtAbstractScaleDraw::draw" ref="aca3c3a7499112f52616d0ee8518fa5a6" args="(QPainter *, const QPalette &) const " -->
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<td class="memname">void QwtAbstractScaleDraw::draw </td>
<td>(</td>
<td class="paramtype">QPainter * </td>
<td class="paramname"><em>painter</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const QPalette & </td>
<td class="paramname"><em>palette</em> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td> const<code> [virtual]</code></td>
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<p>Draw the scale. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">painter</td><td>The painter</td></tr>
<tr><td class="paramname">palette</td><td>Palette, text color is used for the labels, foreground color for ticks and backbone </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a class="anchor" id="a15994a6033e689c3acdb8d83ae4f2a1c"></a><!-- doxytag: member="QwtAbstractScaleDraw::drawBackbone" ref="a15994a6033e689c3acdb8d83ae4f2a1c" args="(QPainter *painter) const =0" -->
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<td class="memname">virtual void QwtAbstractScaleDraw::drawBackbone </td>
<td>(</td>
<td class="paramtype">QPainter * </td>
<td class="paramname"><em>painter</em></td><td>)</td>
<td> const<code> [protected, pure virtual]</code></td>
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<p>Draws the baseline of the scale </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">painter</td><td>Painter</td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#a31791e80bf07d23adbe500740aac5a58">drawTick()</a>, <a class="el" href="class_qwt_abstract_scale_draw.html#aa78dc8bf05a0224450c947af54128d8d">drawLabel()</a> </dd></dl>
<p>Implemented in <a class="el" href="class_qwt_round_scale_draw.html#a845dc48b006ee168415112f39e80da09">QwtRoundScaleDraw</a>, and <a class="el" href="class_qwt_scale_draw.html#aa53015c17e2abb01b179473cc488f20c">QwtScaleDraw</a>.</p>
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<a class="anchor" id="aa78dc8bf05a0224450c947af54128d8d"></a><!-- doxytag: member="QwtAbstractScaleDraw::drawLabel" ref="aa78dc8bf05a0224450c947af54128d8d" args="(QPainter *painter, double value) const =0" -->
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<td class="memname">virtual void QwtAbstractScaleDraw::drawLabel </td>
<td>(</td>
<td class="paramtype">QPainter * </td>
<td class="paramname"><em>painter</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>value</em> </td>
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<tr>
<td></td>
<td>)</td>
<td></td><td> const<code> [protected, pure virtual]</code></td>
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<p>Draws the label for a major scale tick</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">painter</td><td>Painter </td></tr>
<tr><td class="paramname">value</td><td>Value</td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#a31791e80bf07d23adbe500740aac5a58">drawTick()</a>, <a class="el" href="class_qwt_abstract_scale_draw.html#a15994a6033e689c3acdb8d83ae4f2a1c">drawBackbone()</a> </dd></dl>
<p>Implemented in <a class="el" href="class_qwt_round_scale_draw.html#aa43bf3624c464727bb4f0cab28c3f6fe">QwtRoundScaleDraw</a>, and <a class="el" href="class_qwt_scale_draw.html#afc02a11a03efde4ea239d77c4d7711f4">QwtScaleDraw</a>.</p>
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<a class="anchor" id="a31791e80bf07d23adbe500740aac5a58"></a><!-- doxytag: member="QwtAbstractScaleDraw::drawTick" ref="a31791e80bf07d23adbe500740aac5a58" args="(QPainter *painter, double value, double len) const =0" -->
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<td class="memname">virtual void QwtAbstractScaleDraw::drawTick </td>
<td>(</td>
<td class="paramtype">QPainter * </td>
<td class="paramname"><em>painter</em>, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>value</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>len</em> </td>
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<td>)</td>
<td></td><td> const<code> [protected, pure virtual]</code></td>
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<p>Draw a tick</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">painter</td><td>Painter </td></tr>
<tr><td class="paramname">value</td><td>Value of the tick </td></tr>
<tr><td class="paramname">len</td><td>Lenght of the tick</td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#a15994a6033e689c3acdb8d83ae4f2a1c">drawBackbone()</a>, <a class="el" href="class_qwt_abstract_scale_draw.html#aa78dc8bf05a0224450c947af54128d8d">drawLabel()</a> </dd></dl>
<p>Implemented in <a class="el" href="class_qwt_round_scale_draw.html#a8e0363f57f85b8dcf316c9351ab72fc2">QwtRoundScaleDraw</a>, and <a class="el" href="class_qwt_scale_draw.html#a84badd947ddc95a462ec20fe64922b36">QwtScaleDraw</a>.</p>
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<a class="anchor" id="af975410588db6103f281e49d0b43c6a6"></a><!-- doxytag: member="QwtAbstractScaleDraw::enableComponent" ref="af975410588db6103f281e49d0b43c6a6" args="(ScaleComponent, bool enable=true)" -->
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<td class="memname">void QwtAbstractScaleDraw::enableComponent </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_qwt_abstract_scale_draw.html#a26215d06a4d48adf401d0aa05d4193c5">ScaleComponent</a> </td>
<td class="paramname"><em>component</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"><em>enable</em> = <code>true</code> </td>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>En/Disable a component of the scale</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">component</td><td>Scale component </td></tr>
<tr><td class="paramname">enable</td><td>On/Off</td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#a95d74d9eaa5520754295efb33a4db50f">hasComponent()</a> </dd></dl>
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<a class="anchor" id="a1ac28ff3f13123bc6b67223a368c096f"></a><!-- doxytag: member="QwtAbstractScaleDraw::extent" ref="a1ac28ff3f13123bc6b67223a368c096f" args="(const QFont &) const =0" -->
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<td class="memname">virtual double QwtAbstractScaleDraw::extent </td>
<td>(</td>
<td class="paramtype">const QFont & </td>
<td class="paramname"></td><td>)</td>
<td> const<code> [pure virtual]</code></td>
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<p>Calculate the extent</p>
<p>The extent is the distcance from the baseline to the outermost pixel of the scale draw in opposite to its orientation. It is at least <a class="el" href="class_qwt_abstract_scale_draw.html#a563f102ef1370ecdfdc47133fb0c78ec">minimumExtent()</a> pixels.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#ac174255c334b995ca010a6964597d5f2" title="Set a minimum for the extent.">setMinimumExtent()</a>, <a class="el" href="class_qwt_abstract_scale_draw.html#a563f102ef1370ecdfdc47133fb0c78ec">minimumExtent()</a> </dd></dl>
<p>Implemented in <a class="el" href="class_qwt_round_scale_draw.html#a786fd49ec94ab51bb75d7a2f495b2727">QwtRoundScaleDraw</a>, and <a class="el" href="class_qwt_scale_draw.html#a1fa0cebc2b8f69dce72b0514ad7653f0">QwtScaleDraw</a>.</p>
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<a class="anchor" id="a95d74d9eaa5520754295efb33a4db50f"></a><!-- doxytag: member="QwtAbstractScaleDraw::hasComponent" ref="a95d74d9eaa5520754295efb33a4db50f" args="(ScaleComponent) const " -->
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<td class="memname">bool QwtAbstractScaleDraw::hasComponent </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_qwt_abstract_scale_draw.html#a26215d06a4d48adf401d0aa05d4193c5">ScaleComponent</a> </td>
<td class="paramname"><em>component</em></td><td>)</td>
<td> const</td>
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<p>Check if a component is enabled </p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#af975410588db6103f281e49d0b43c6a6">enableComponent()</a> </dd></dl>
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<a class="anchor" id="a4ed95cd23c5d779c1b05aa5295409aa6"></a><!-- doxytag: member="QwtAbstractScaleDraw::invalidateCache" ref="a4ed95cd23c5d779c1b05aa5295409aa6" args="()" -->
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<td class="memname">void QwtAbstractScaleDraw::invalidateCache </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [protected]</code></td>
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<p>Invalidate the cache used by <a class="el" href="class_qwt_abstract_scale_draw.html#a5e703dcb115a51024f89f92e61c2c8d8" title="Convert a value into its representing label and cache it.">QwtAbstractScaleDraw::tickLabel</a></p>
<p>The cache is invalidated, when a new <a class="el" href="class_qwt_scale_div.html" title="A class representing a scale division.">QwtScaleDiv</a> is set. If the labels need to be changed. while the same <a class="el" href="class_qwt_scale_div.html" title="A class representing a scale division.">QwtScaleDiv</a> is set, <a class="el" href="class_qwt_abstract_scale_draw.html#a4ed95cd23c5d779c1b05aa5295409aa6">invalidateCache()</a> needs to be called manually. </p>
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<a class="anchor" id="a4ff88bc827dd6c6ca9298de13483b61f"></a><!-- doxytag: member="QwtAbstractScaleDraw::label" ref="a4ff88bc827dd6c6ca9298de13483b61f" args="(double) const " -->
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<td class="memname"><a class="el" href="class_qwt_text.html">QwtText</a> QwtAbstractScaleDraw::label </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>value</em></td><td>)</td>
<td> const<code> [virtual]</code></td>
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<p>Convert a value into its representing label. </p>
<p>The value is converted to a plain text using QLocale::system().toString(value). This method is often overloaded by applications to have individual labels.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">value</td><td>Value </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Label string. </dd></dl>
<p>Reimplemented in <a class="el" href="class_qwt_dial_scale_draw.html#aa497b0ca0f1c4d27a0bcc3c30556cb09">QwtDialScaleDraw</a>.</p>
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<a class="anchor" id="afac6ad0e98fefd9d103366726542a055"></a><!-- doxytag: member="QwtAbstractScaleDraw::maxTickLength" ref="afac6ad0e98fefd9d103366726542a055" args="() const " -->
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<td class="memname">double QwtAbstractScaleDraw::maxTickLength </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<dl class="return"><dt><b>Returns:</b></dt><dd>Length of the longest tick</dd></dl>
<p>Useful for layout calculations </p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#aa43034f7ad87c33e9790c730ed48c55d">tickLength()</a>, <a class="el" href="class_qwt_abstract_scale_draw.html#a7fed388e435aae791d61f48cc9ddf632">setTickLength()</a> </dd></dl>
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<a class="anchor" id="a563f102ef1370ecdfdc47133fb0c78ec"></a><!-- doxytag: member="QwtAbstractScaleDraw::minimumExtent" ref="a563f102ef1370ecdfdc47133fb0c78ec" args="() const " -->
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<td class="memname">double QwtAbstractScaleDraw::minimumExtent </td>
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<td class="paramname"></td><td>)</td>
<td> const</td>
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<p>Get the minimum extent </p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#a1ac28ff3f13123bc6b67223a368c096f">extent()</a>, <a class="el" href="class_qwt_abstract_scale_draw.html#ac174255c334b995ca010a6964597d5f2" title="Set a minimum for the extent.">setMinimumExtent()</a> </dd></dl>
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<a class="anchor" id="a8933b8da6332a6d4badfa83e67b74865"></a><!-- doxytag: member="QwtAbstractScaleDraw::penWidth" ref="a8933b8da6332a6d4badfa83e67b74865" args="() const " -->
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<td class="memname">int QwtAbstractScaleDraw::penWidth </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<div class="memdoc">
<dl class="return"><dt><b>Returns:</b></dt><dd>Scale pen width </dd></dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#a098e1f813077c9bb0c5f83266035943a" title="Specify the width of the scale pen.">setPenWidth()</a> </dd></dl>
<p>Reimplemented in <a class="el" href="class_qwt_dial_scale_draw.html#ada6f34e92c47bbe2916c50e67494a542">QwtDialScaleDraw</a>.</p>
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<a class="anchor" id="a82510027cd5bee269628c9d6302a19a9"></a><!-- doxytag: member="QwtAbstractScaleDraw::scaleDiv" ref="a82510027cd5bee269628c9d6302a19a9" args="() const " -->
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<td class="memname">const <a class="el" href="class_qwt_scale_div.html">QwtScaleDiv</a> & QwtAbstractScaleDraw::scaleDiv </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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<dl class="return"><dt><b>Returns:</b></dt><dd>scale division </dd></dl>
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<a class="anchor" id="aac87f593525666a47a57d9e2b4f02c66"></a><!-- doxytag: member="QwtAbstractScaleDraw::scaleMap" ref="aac87f593525666a47a57d9e2b4f02c66" args="() const " -->
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<td class="memname">const <a class="el" href="class_qwt_scale_map.html">QwtScaleMap</a> & QwtAbstractScaleDraw::scaleMap </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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</table>
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<dl class="return"><dt><b>Returns:</b></dt><dd>Map how to translate between scale and pixel values </dd></dl>
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<a class="anchor" id="ae7488eb63ad73a2e69acb29ff069c904"></a><!-- doxytag: member="QwtAbstractScaleDraw::scaleMap" ref="ae7488eb63ad73a2e69acb29ff069c904" args="()" -->
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<td class="memname"><a class="el" href="class_qwt_scale_map.html">QwtScaleMap</a> & QwtAbstractScaleDraw::scaleMap </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td></td>
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<dl class="return"><dt><b>Returns:</b></dt><dd>Map how to translate between scale and pixel values </dd></dl>
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<a class="anchor" id="ac174255c334b995ca010a6964597d5f2"></a><!-- doxytag: member="QwtAbstractScaleDraw::setMinimumExtent" ref="ac174255c334b995ca010a6964597d5f2" args="(double)" -->
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<td class="memname">void QwtAbstractScaleDraw::setMinimumExtent </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>minExtent</em></td><td>)</td>
<td></td>
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<p>Set a minimum for the extent. </p>
<p>The extent is calculated from the coomponents of the scale draw. In situations, where the labels are changing and the layout depends on the extent (f.e scrolling a scale), setting an upper limit as minimum extent will avoid jumps of the layout.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">minExtent</td><td>Minimum extent</td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#a1ac28ff3f13123bc6b67223a368c096f">extent()</a>, <a class="el" href="class_qwt_abstract_scale_draw.html#a563f102ef1370ecdfdc47133fb0c78ec">minimumExtent()</a> </dd></dl>
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<a class="anchor" id="a098e1f813077c9bb0c5f83266035943a"></a><!-- doxytag: member="QwtAbstractScaleDraw::setPenWidth" ref="a098e1f813077c9bb0c5f83266035943a" args="(int width)" -->
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<td class="memname">void QwtAbstractScaleDraw::setPenWidth </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>width</em></td><td>)</td>
<td></td>
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<p>Specify the width of the scale pen. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">width</td><td>Pen width </td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#a8933b8da6332a6d4badfa83e67b74865">penWidth()</a> </dd></dl>
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<a class="anchor" id="a4399aac94a294f5ed6c52114dde00d2f"></a><!-- doxytag: member="QwtAbstractScaleDraw::setScaleDiv" ref="a4399aac94a294f5ed6c52114dde00d2f" args="(const QwtScaleDiv &s)" -->
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<td class="memname">void QwtAbstractScaleDraw::setScaleDiv </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_qwt_scale_div.html">QwtScaleDiv</a> & </td>
<td class="paramname"><em>sd</em></td><td>)</td>
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<p>Change the scale division </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">sd</td><td>New scale division </td></tr>
</table>
</dd>
</dl>
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<a class="anchor" id="ae5bdaadb303510f7eb9dbec5c52f7a47"></a><!-- doxytag: member="QwtAbstractScaleDraw::setSpacing" ref="ae5bdaadb303510f7eb9dbec5c52f7a47" args="(double margin)" -->
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<td class="memname">void QwtAbstractScaleDraw::setSpacing </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>spacing</em></td><td>)</td>
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<p>Set the spacing between tick and labels. </p>
<p>The spacing is the distance between ticks and labels. The default spacing is 4 pixels.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">spacing</td><td>Spacing</td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#a93561d85e879402086f2607e45e89cc2" title="Get the spacing.">spacing()</a> </dd></dl>
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<a class="anchor" id="a7fed388e435aae791d61f48cc9ddf632"></a><!-- doxytag: member="QwtAbstractScaleDraw::setTickLength" ref="a7fed388e435aae791d61f48cc9ddf632" args="(QwtScaleDiv::TickType, double length)" -->
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<td class="memname">void QwtAbstractScaleDraw::setTickLength </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_qwt_scale_div.html#af21aedaa886dd5e067cf63505838736c">QwtScaleDiv::TickType</a> </td>
<td class="paramname"><em>tickType</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>length</em> </td>
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<td>)</td>
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<p>Set the length of the ticks</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">tickType</td><td>Tick type </td></tr>
<tr><td class="paramname">length</td><td>New length</td></tr>
</table>
</dd>
</dl>
<dl class="warning"><dt><b>Warning:</b></dt><dd>the length is limited to [0..1000] </dd></dl>
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<a class="anchor" id="a0011367eb32519070e6f276ac393dcfb"></a><!-- doxytag: member="QwtAbstractScaleDraw::setTransformation" ref="a0011367eb32519070e6f276ac393dcfb" args="(QwtScaleTransformation *)" -->
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<td class="memname">void QwtAbstractScaleDraw::setTransformation </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a> * </td>
<td class="paramname"><em>transformation</em></td><td>)</td>
<td></td>
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<p>Change the transformation of the scale </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">transformation</td><td>New scale transformation </td></tr>
</table>
</dd>
</dl>
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<a class="anchor" id="a93561d85e879402086f2607e45e89cc2"></a><!-- doxytag: member="QwtAbstractScaleDraw::spacing" ref="a93561d85e879402086f2607e45e89cc2" args="() const " -->
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<td class="memname">double QwtAbstractScaleDraw::spacing </td>
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<td> const</td>
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<p>Get the spacing. </p>
<p>The spacing is the distance between ticks and labels. The default spacing is 4 pixels.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#ae5bdaadb303510f7eb9dbec5c52f7a47" title="Set the spacing between tick and labels.">setSpacing()</a> </dd></dl>
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<a class="anchor" id="a5e703dcb115a51024f89f92e61c2c8d8"></a><!-- doxytag: member="QwtAbstractScaleDraw::tickLabel" ref="a5e703dcb115a51024f89f92e61c2c8d8" args="(const QFont &, double value) const " -->
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<td class="memname">const <a class="el" href="class_qwt_text.html">QwtText</a> & QwtAbstractScaleDraw::tickLabel </td>
<td>(</td>
<td class="paramtype">const QFont & </td>
<td class="paramname"><em>font</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>value</em> </td>
</tr>
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<td>)</td>
<td></td><td> const<code> [protected]</code></td>
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<p>Convert a value into its representing label and cache it. </p>
<p>The conversion between value and label is called very often in the layout and painting code. Unfortunately the calculation of the label sizes might be slow (really slow for rich text in Qt4), so it's necessary to cache the labels.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">font</td><td>Font </td></tr>
<tr><td class="paramname">value</td><td>Value</td></tr>
</table>
</dd>
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<dl class="return"><dt><b>Returns:</b></dt><dd>Tick label </dd></dl>
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<a class="anchor" id="aa43034f7ad87c33e9790c730ed48c55d"></a><!-- doxytag: member="QwtAbstractScaleDraw::tickLength" ref="aa43034f7ad87c33e9790c730ed48c55d" args="(QwtScaleDiv::TickType) const " -->
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<td class="memname">double QwtAbstractScaleDraw::tickLength </td>
<td>(</td>
<td class="paramtype"><a class="el" href="class_qwt_scale_div.html#af21aedaa886dd5e067cf63505838736c">QwtScaleDiv::TickType</a> </td>
<td class="paramname"><em>tickType</em></td><td>)</td>
<td> const</td>
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<p>Return the length of the ticks</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#a7fed388e435aae791d61f48cc9ddf632">setTickLength()</a>, <a class="el" href="class_qwt_abstract_scale_draw.html#afac6ad0e98fefd9d103366726542a055">maxTickLength()</a> </dd></dl>
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