class_qwt_log_scale_engine.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<a href="#pub-methods">Public Member Functions</a> |
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<p>A scale engine for logarithmic scales.
<a href="class_qwt_log_scale_engine.html#details">More...</a></p>
<p><code>#include <<a class="el" href="qwt__scale__engine_8h_source.html">qwt_scale_engine.h</a>></code></p>
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Inheritance diagram for QwtLogScaleEngine:</div>
<div class="dyncontent">
<div class="center"><img src="class_qwt_log_scale_engine__inherit__graph.png" border="0" usemap="#_qwt_log_scale_engine_inherit__map" alt="Inheritance graph"/></div>
<map name="_qwt_log_scale_engine_inherit__map" id="_qwt_log_scale_engine_inherit__map">
<area shape="rect" id="node2" href="class_qwt_scale_engine.html" title="Base class for scale engines." alt="" coords="16,5,132,32"/></map>
<center><span class="legend">[<a href="graph_legend.html">legend</a>]</span></center></div>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a68f89f870f918c2ecc56d8d2b0074a3a"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_log_scale_engine.html#a68f89f870f918c2ecc56d8d2b0074a3a">QwtLogScaleEngine</a> (uint <a class="el" href="class_qwt_scale_engine.html#a5bfe4467f5b311b3879253b0a4470a2c">base</a>=10)</td></tr>
<tr class="separator:a68f89f870f918c2ecc56d8d2b0074a3a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad749149c492c7105fb6e5518abd323c9"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ad749149c492c7105fb6e5518abd323c9"></a>
virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_log_scale_engine.html#ad749149c492c7105fb6e5518abd323c9">~QwtLogScaleEngine</a> ()</td></tr>
<tr class="memdesc:ad749149c492c7105fb6e5518abd323c9"><td class="mdescLeft"> </td><td class="mdescRight">Destructor. <br/></td></tr>
<tr class="separator:ad749149c492c7105fb6e5518abd323c9"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5020a25dde6a7d4dbf16012445c4cc81"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_log_scale_engine.html#a5020a25dde6a7d4dbf16012445c4cc81">autoScale</a> (int maxSteps, double &x1, double &x2, double &stepSize) const </td></tr>
<tr class="separator:a5020a25dde6a7d4dbf16012445c4cc81"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a883cc249cfcc290675af84960e4eccaf"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="class_qwt_scale_div.html">QwtScaleDiv</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_log_scale_engine.html#a883cc249cfcc290675af84960e4eccaf">divideScale</a> (double x1, double x2, int numMajorSteps, int numMinorSteps, double stepSize=0.0) const </td></tr>
<tr class="memdesc:a883cc249cfcc290675af84960e4eccaf"><td class="mdescLeft"> </td><td class="mdescRight">Calculate a scale division. <a href="#a883cc249cfcc290675af84960e4eccaf">More...</a><br/></td></tr>
<tr class="separator:a883cc249cfcc290675af84960e4eccaf"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_methods_class_qwt_scale_engine"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_class_qwt_scale_engine')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="class_qwt_scale_engine.html">QwtScaleEngine</a></td></tr>
<tr class="memitem:a4ad501667558e5095d36cc190d12790d inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#a4ad501667558e5095d36cc190d12790d">QwtScaleEngine</a> (uint <a class="el" href="class_qwt_scale_engine.html#a5bfe4467f5b311b3879253b0a4470a2c">base</a>=10)</td></tr>
<tr class="separator:a4ad501667558e5095d36cc190d12790d inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab9c21b4550d44d9a82c1865864cb8943 inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab9c21b4550d44d9a82c1865864cb8943"></a>
virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#ab9c21b4550d44d9a82c1865864cb8943">~QwtScaleEngine</a> ()</td></tr>
<tr class="memdesc:ab9c21b4550d44d9a82c1865864cb8943 inherit pub_methods_class_qwt_scale_engine"><td class="mdescLeft"> </td><td class="mdescRight">Destructor. <br/></td></tr>
<tr class="separator:ab9c21b4550d44d9a82c1865864cb8943 inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:afdabe4fd2a89b7cd5a21cdc9ac2269d6 inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#afdabe4fd2a89b7cd5a21cdc9ac2269d6">setBase</a> (uint <a class="el" href="class_qwt_scale_engine.html#a5bfe4467f5b311b3879253b0a4470a2c">base</a>)</td></tr>
<tr class="separator:afdabe4fd2a89b7cd5a21cdc9ac2269d6 inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5bfe4467f5b311b3879253b0a4470a2c inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">uint </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#a5bfe4467f5b311b3879253b0a4470a2c">base</a> () const </td></tr>
<tr class="separator:a5bfe4467f5b311b3879253b0a4470a2c inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:acf02a88f6e778edbc9e005960f35b3b7 inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#acf02a88f6e778edbc9e005960f35b3b7">setAttribute</a> (<a class="el" href="class_qwt_scale_engine.html#a7548418e0896d75eec164bfa2ba3ff5f">Attribute</a>, bool on=true)</td></tr>
<tr class="separator:acf02a88f6e778edbc9e005960f35b3b7 inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab43cac5ff8843531bbb02b4401e8fb62 inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#ab43cac5ff8843531bbb02b4401e8fb62">testAttribute</a> (<a class="el" href="class_qwt_scale_engine.html#a7548418e0896d75eec164bfa2ba3ff5f">Attribute</a>) const </td></tr>
<tr class="separator:ab43cac5ff8843531bbb02b4401e8fb62 inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:acd73d5f27b5db0bc7ee673eb6fe9810d inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#acd73d5f27b5db0bc7ee673eb6fe9810d">setAttributes</a> (<a class="el" href="class_qwt_scale_engine.html#a798f5f1420019d33baa799d26bca0255">Attributes</a>)</td></tr>
<tr class="separator:acd73d5f27b5db0bc7ee673eb6fe9810d inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a044961cfa3be3ac86d49610c3881df08 inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_qwt_scale_engine.html#a798f5f1420019d33baa799d26bca0255">Attributes</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#a044961cfa3be3ac86d49610c3881df08">attributes</a> () const </td></tr>
<tr class="separator:a044961cfa3be3ac86d49610c3881df08 inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a89985ea69dbd858c8b9162ecd2be936e inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#a89985ea69dbd858c8b9162ecd2be936e">setReference</a> (double <a class="el" href="class_qwt_scale_engine.html#a5962458870865df797e84e3bd6badf02">reference</a>)</td></tr>
<tr class="memdesc:a89985ea69dbd858c8b9162ecd2be936e inherit pub_methods_class_qwt_scale_engine"><td class="mdescLeft"> </td><td class="mdescRight">Specify a reference point. <a href="#a89985ea69dbd858c8b9162ecd2be936e">More...</a><br/></td></tr>
<tr class="separator:a89985ea69dbd858c8b9162ecd2be936e inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5962458870865df797e84e3bd6badf02 inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#a5962458870865df797e84e3bd6badf02">reference</a> () const </td></tr>
<tr class="separator:a5962458870865df797e84e3bd6badf02 inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aed2ab1fc105a25fa97bbecf4b2f541a7 inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#aed2ab1fc105a25fa97bbecf4b2f541a7">setMargins</a> (double lower, double upper)</td></tr>
<tr class="memdesc:aed2ab1fc105a25fa97bbecf4b2f541a7 inherit pub_methods_class_qwt_scale_engine"><td class="mdescLeft"> </td><td class="mdescRight">Specify margins at the scale's endpoints. <a href="#aed2ab1fc105a25fa97bbecf4b2f541a7">More...</a><br/></td></tr>
<tr class="separator:aed2ab1fc105a25fa97bbecf4b2f541a7 inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a0cbcd5c35a8796baf8307bba19991bab inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#a0cbcd5c35a8796baf8307bba19991bab">lowerMargin</a> () const </td></tr>
<tr class="separator:a0cbcd5c35a8796baf8307bba19991bab inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa3fca2f37156fa3bd8ef21be8d339938 inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#aa3fca2f37156fa3bd8ef21be8d339938">upperMargin</a> () const </td></tr>
<tr class="separator:aa3fca2f37156fa3bd8ef21be8d339938 inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad063f4bb947996191be5c2a5fa0dbaf6 inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#ad063f4bb947996191be5c2a5fa0dbaf6">setTransformation</a> (<a class="el" href="class_qwt_transform.html">QwtTransform</a> *)</td></tr>
<tr class="separator:ad063f4bb947996191be5c2a5fa0dbaf6 inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:acbc5488cb3f3e2ec9566d4797468d0d7 inherit pub_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_qwt_transform.html">QwtTransform</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#acbc5488cb3f3e2ec9566d4797468d0d7">transformation</a> () const </td></tr>
<tr class="separator:acbc5488cb3f3e2ec9566d4797468d0d7 inherit pub_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-methods"></a>
Protected Member Functions</h2></td></tr>
<tr class="memitem:a9f0b3b6855c6fd4eda0855078b480206"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_qwt_interval.html">QwtInterval</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_log_scale_engine.html#a9f0b3b6855c6fd4eda0855078b480206">align</a> (const <a class="el" href="class_qwt_interval.html">QwtInterval</a> &, double stepSize) const </td></tr>
<tr class="memdesc:a9f0b3b6855c6fd4eda0855078b480206"><td class="mdescLeft"> </td><td class="mdescRight">Align an interval to a step size. <a href="#a9f0b3b6855c6fd4eda0855078b480206">More...</a><br/></td></tr>
<tr class="separator:a9f0b3b6855c6fd4eda0855078b480206"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5ab57d233a5722d74426f4c7c5f1b9a9"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_log_scale_engine.html#a5ab57d233a5722d74426f4c7c5f1b9a9">buildTicks</a> (const <a class="el" href="class_qwt_interval.html">QwtInterval</a> &, double stepSize, int maxMinSteps, QList< double > ticks[<a class="el" href="class_qwt_scale_div.html#af21aedaa886dd5e067cf63505838736ca86796bbf72d5eb7162a924ba27ce6553">QwtScaleDiv::NTickTypes</a>]) const </td></tr>
<tr class="memdesc:a5ab57d233a5722d74426f4c7c5f1b9a9"><td class="mdescLeft"> </td><td class="mdescRight">Calculate ticks for an interval. <a href="#a5ab57d233a5722d74426f4c7c5f1b9a9">More...</a><br/></td></tr>
<tr class="separator:a5ab57d233a5722d74426f4c7c5f1b9a9"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7918a44fcf0e308f23a687610778bbeb"><td class="memItemLeft" align="right" valign="top">QList< double > </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_log_scale_engine.html#a7918a44fcf0e308f23a687610778bbeb">buildMajorTicks</a> (const <a class="el" href="class_qwt_interval.html">QwtInterval</a> &interval, double stepSize) const </td></tr>
<tr class="memdesc:a7918a44fcf0e308f23a687610778bbeb"><td class="mdescLeft"> </td><td class="mdescRight">Calculate major ticks for an interval. <a href="#a7918a44fcf0e308f23a687610778bbeb">More...</a><br/></td></tr>
<tr class="separator:a7918a44fcf0e308f23a687610778bbeb"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:adf9985e35cbacb8ba48378c3781a2071"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_log_scale_engine.html#adf9985e35cbacb8ba48378c3781a2071">buildMinorTicks</a> (const QList< double > &majorTicks, int maxMinorSteps, double stepSize, QList< double > &minorTicks, QList< double > &mediumTicks) const </td></tr>
<tr class="memdesc:adf9985e35cbacb8ba48378c3781a2071"><td class="mdescLeft"> </td><td class="mdescRight">Calculate minor/medium ticks for major ticks. <a href="#adf9985e35cbacb8ba48378c3781a2071">More...</a><br/></td></tr>
<tr class="separator:adf9985e35cbacb8ba48378c3781a2071"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pro_methods_class_qwt_scale_engine"><td colspan="2" onclick="javascript:toggleInherit('pro_methods_class_qwt_scale_engine')"><img src="closed.png" alt="-"/> Protected Member Functions inherited from <a class="el" href="class_qwt_scale_engine.html">QwtScaleEngine</a></td></tr>
<tr class="memitem:a36acba98650d011f784641fa4ac43f87 inherit pro_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#a36acba98650d011f784641fa4ac43f87">contains</a> (const <a class="el" href="class_qwt_interval.html">QwtInterval</a> &, double val) const </td></tr>
<tr class="separator:a36acba98650d011f784641fa4ac43f87 inherit pro_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab2b5b3c6081e1d0007f904dbc3f9f7f1 inherit pro_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">QList< double > </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#ab2b5b3c6081e1d0007f904dbc3f9f7f1">strip</a> (const QList< double > &, const <a class="el" href="class_qwt_interval.html">QwtInterval</a> &) const </td></tr>
<tr class="separator:ab2b5b3c6081e1d0007f904dbc3f9f7f1 inherit pro_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aff30158c5ccfee78f4c3e01c0fb5f4de inherit pro_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#aff30158c5ccfee78f4c3e01c0fb5f4de">divideInterval</a> (double interval, int numSteps) const </td></tr>
<tr class="separator:aff30158c5ccfee78f4c3e01c0fb5f4de inherit pro_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac9d1a77655b633ee4f165eb5c43a4374 inherit pro_methods_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_qwt_interval.html">QwtInterval</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#ac9d1a77655b633ee4f165eb5c43a4374">buildInterval</a> (double v) const </td></tr>
<tr class="memdesc:ac9d1a77655b633ee4f165eb5c43a4374 inherit pro_methods_class_qwt_scale_engine"><td class="mdescLeft"> </td><td class="mdescRight">Build an interval for a value. <a href="#ac9d1a77655b633ee4f165eb5c43a4374">More...</a><br/></td></tr>
<tr class="separator:ac9d1a77655b633ee4f165eb5c43a4374 inherit pro_methods_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="inherited"></a>
Additional Inherited Members</h2></td></tr>
<tr class="inherit_header pub_types_class_qwt_scale_engine"><td colspan="2" onclick="javascript:toggleInherit('pub_types_class_qwt_scale_engine')"><img src="closed.png" alt="-"/> Public Types inherited from <a class="el" href="class_qwt_scale_engine.html">QwtScaleEngine</a></td></tr>
<tr class="memitem:a7548418e0896d75eec164bfa2ba3ff5f inherit pub_types_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#a7548418e0896d75eec164bfa2ba3ff5f">Attribute</a> { <br/>
  <a class="el" href="class_qwt_scale_engine.html#a7548418e0896d75eec164bfa2ba3ff5fa617f0da0b90080be49b79dbaaab191f8">NoAttribute</a> = 0x00,
<a class="el" href="class_qwt_scale_engine.html#a7548418e0896d75eec164bfa2ba3ff5fad29dea0ac58c4675ac009620b0857984">IncludeReference</a> = 0x01,
<a class="el" href="class_qwt_scale_engine.html#a7548418e0896d75eec164bfa2ba3ff5fab3931d404b68708d0c6eaf87ae744fc9">Symmetric</a> = 0x02,
<a class="el" href="class_qwt_scale_engine.html#a7548418e0896d75eec164bfa2ba3ff5fa2158d4b3596e7d4a00375821fc0d20c3">Floating</a> = 0x04,
<br/>
  <a class="el" href="class_qwt_scale_engine.html#a7548418e0896d75eec164bfa2ba3ff5fa2f3985208684d394319320b8e67ea062">Inverted</a> = 0x08
<br/>
}</td></tr>
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<tr class="memitem:a798f5f1420019d33baa799d26bca0255 inherit pub_types_class_qwt_scale_engine"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a798f5f1420019d33baa799d26bca0255"></a>
typedef QFlags< <a class="el" href="class_qwt_scale_engine.html#a7548418e0896d75eec164bfa2ba3ff5f">Attribute</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_engine.html#a798f5f1420019d33baa799d26bca0255">Attributes</a></td></tr>
<tr class="memdesc:a798f5f1420019d33baa799d26bca0255 inherit pub_types_class_qwt_scale_engine"><td class="mdescLeft"> </td><td class="mdescRight">Layout attributes. <br/></td></tr>
<tr class="separator:a798f5f1420019d33baa799d26bca0255 inherit pub_types_class_qwt_scale_engine"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>A scale engine for logarithmic scales. </p>
<p>The step size is measured in <em>decades</em> and the major step size will be adjusted to fit the pattern <img class="formulaInl" alt="$\left\{ 1,2,3,5\right\} \cdot 10^{n}$" src="form_5.png"/>, where n is a natural number including zero.</p>
<dl class="section warning"><dt>Warning</dt><dd>the step size as well as the margins are measured in <em>decades</em>. </dd></dl>
</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<td class="memname">QwtLogScaleEngine::QwtLogScaleEngine </td>
<td>(</td>
<td class="paramtype">uint </td>
<td class="paramname"><em>base</em> = <code>10</code></td><td>)</td>
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<p>Constructor</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">base</td><td>Base of the scale engine </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="class_qwt_scale_engine.html#afdabe4fd2a89b7cd5a21cdc9ac2269d6">setBase()</a> </dd></dl>
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname"><a class="el" href="class_qwt_interval.html">QwtInterval</a> QwtLogScaleEngine::align </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_qwt_interval.html">QwtInterval</a> & </td>
<td class="paramname"><em>interval</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">double </td>
<td class="paramname"><em>stepSize</em> </td>
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<td>)</td>
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<p>Align an interval to a step size. </p>
<p>The limits of an interval are aligned that both are integer multiples of the step size.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">interval</td><td>Interval </td></tr>
<tr><td class="paramname">stepSize</td><td>Step size</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Aligned interval </dd></dl>
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<td class="memname">void QwtLogScaleEngine::autoScale </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>maxNumSteps</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">double & </td>
<td class="paramname"><em>x1</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">double & </td>
<td class="paramname"><em>x2</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">double & </td>
<td class="paramname"><em>stepSize</em> </td>
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<td></td>
<td>)</td>
<td></td><td> const</td>
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<p>Align and divide an interval</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">maxNumSteps</td><td>Max. number of steps </td></tr>
<tr><td class="paramname">x1</td><td>First limit of the interval (In/Out) </td></tr>
<tr><td class="paramname">x2</td><td>Second limit of the interval (In/Out) </td></tr>
<tr><td class="paramname">stepSize</td><td>Step size (Out)</td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="class_qwt_scale_engine.html#acf02a88f6e778edbc9e005960f35b3b7">QwtScaleEngine::setAttribute()</a> </dd></dl>
<p>Implements <a class="el" href="class_qwt_scale_engine.html#aa27323d6d9d5348bd253a61b45e4785b">QwtScaleEngine</a>.</p>
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<td class="memname">QList< double > QwtLogScaleEngine::buildMajorTicks </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_qwt_interval.html">QwtInterval</a> & </td>
<td class="paramname"><em>interval</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>stepSize</em> </td>
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<td>)</td>
<td></td><td> const</td>
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<p>Calculate major ticks for an interval. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">interval</td><td>Interval </td></tr>
<tr><td class="paramname">stepSize</td><td>Step size</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Calculated ticks </dd></dl>
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<td class="memname">void QwtLogScaleEngine::buildMinorTicks </td>
<td>(</td>
<td class="paramtype">const QList< double > & </td>
<td class="paramname"><em>majorTicks</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">int </td>
<td class="paramname"><em>maxMinorSteps</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">double </td>
<td class="paramname"><em>stepSize</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">QList< double > & </td>
<td class="paramname"><em>minorTicks</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">QList< double > & </td>
<td class="paramname"><em>mediumTicks</em> </td>
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<td></td>
<td>)</td>
<td></td><td> const</td>
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<p>Calculate minor/medium ticks for major ticks. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">majorTicks</td><td>Major ticks </td></tr>
<tr><td class="paramname">maxMinorSteps</td><td>Maximum number of minor steps </td></tr>
<tr><td class="paramname">stepSize</td><td>Step size </td></tr>
<tr><td class="paramname">minorTicks</td><td>Array to be filled with the calculated minor ticks </td></tr>
<tr><td class="paramname">mediumTicks</td><td>Array to be filled with the calculated medium ticks </td></tr>
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</dd>
</dl>
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<td class="memname">void QwtLogScaleEngine::buildTicks </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_qwt_interval.html">QwtInterval</a> & </td>
<td class="paramname"><em>interval</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">double </td>
<td class="paramname"><em>stepSize</em>, </td>
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<td class="paramtype">int </td>
<td class="paramname"><em>maxMinorSteps</em>, </td>
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<td class="paramtype">QList< double > </td>
<td class="paramname"><em>ticks</em>[QwtScaleDiv::NTickTypes] </td>
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<tr>
<td></td>
<td>)</td>
<td></td><td> const</td>
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<p>Calculate ticks for an interval. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">interval</td><td>Interval </td></tr>
<tr><td class="paramname">maxMinorSteps</td><td>Maximum number of minor steps </td></tr>
<tr><td class="paramname">stepSize</td><td>Step size </td></tr>
<tr><td class="paramname">ticks</td><td>Arrays to be filled with the calculated ticks</td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="class_qwt_log_scale_engine.html#a7918a44fcf0e308f23a687610778bbeb" title="Calculate major ticks for an interval.">buildMajorTicks()</a>, <a class="el" href="class_qwt_log_scale_engine.html#adf9985e35cbacb8ba48378c3781a2071" title="Calculate minor/medium ticks for major ticks.">buildMinorTicks</a> </dd></dl>
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<td class="memname"><a class="el" href="class_qwt_scale_div.html">QwtScaleDiv</a> QwtLogScaleEngine::divideScale </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"><em>x1</em>, </td>
</tr>
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<td class="paramkey"></td>
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<td class="paramtype">double </td>
<td class="paramname"><em>x2</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">int </td>
<td class="paramname"><em>maxMajorSteps</em>, </td>
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<td class="paramtype">int </td>
<td class="paramname"><em>maxMinorSteps</em>, </td>
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<td class="paramname"><em>stepSize</em> = <code>0.0</code> </td>
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<td>)</td>
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<p>Calculate a scale division. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">x1</td><td>First interval limit </td></tr>
<tr><td class="paramname">x2</td><td>Second interval limit </td></tr>
<tr><td class="paramname">maxMajorSteps</td><td>Maximum for the number of major steps </td></tr>
<tr><td class="paramname">maxMinorSteps</td><td>Maximum number of minor steps </td></tr>
<tr><td class="paramname">stepSize</td><td>Step size. If stepSize == 0, the engine calculates one. </td></tr>
</table>
</dd>
</dl>
<p>Implements <a class="el" href="class_qwt_scale_engine.html#ab85442ced7cf3a39e5ad25f8cb80dea4">QwtScaleEngine</a>.</p>
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