class_qwt_log10_scale_engine.html

QWT5.01用于Qt开发的二维图形库程序

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          <td class="md" nowrap>double&nbsp;</td>
          <td class="mdname" nowrap> <em>stepSize</em> = <code>0.0</code></td>
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          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"> const<code> [virtual]</code></td>
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Calculate a scale division. 
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<dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>x1</em>&nbsp;</td><td>First interval limit </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>x2</em>&nbsp;</td><td>Second interval limit </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>maxMajSteps</em>&nbsp;</td><td>Maximum for the number of major steps </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>maxMinSteps</em>&nbsp;</td><td>Maximum number of minor steps </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>stepSize</em>&nbsp;</td><td>Step size. If stepSize == 0, the scaleEngine calculates one.</td></tr>
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<dl compact><dt><b>See also:</b></dt><dd>QwtScaleEngine::stepSize, QwtLog10ScaleEngine::subDivide </dd></dl>

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Implements <a class="el" href="class_qwt_scale_engine.html#833fbdad4cce6e3b6448ee2549dc09e1">QwtScaleEngine</a>.
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Definition at line <a class="el" href="qwt__scale__engine_8cpp-source.html#l00693">693</a> of file <a class="el" href="qwt__scale__engine_8cpp-source.html">qwt_scale_engine.cpp</a>.
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References <a class="el" href="qwt__scale__engine_8cpp-source.html#l00379">QwtScaleEngine::attributes()</a>, <a class="el" href="qwt__scale__engine_8cpp-source.html#l00233">QwtScaleEngine::divideInterval()</a>, <a class="el" href="qwt__scale__engine_8cpp-source.html#l00468">QwtLinearScaleEngine::divideScale()</a>, <a class="el" href="qwt__scale__engine_8cpp-source.html#l00198">QwtScaleEngine::hiMargin()</a>, <a class="el" href="qwt__scale__div_8cpp-source.html#l00118">QwtScaleDiv::invert()</a>, <a class="el" href="qwt__double__interval_8cpp-source.html#l00159">QwtDoubleInterval::limited()</a>, <a class="el" href="qwt__scale__engine_8cpp-source.html#l00899">log10()</a>, <a class="el" href="qwt__scale__engine_8cpp-source.html#l00187">QwtScaleEngine::loMargin()</a>, <a class="el" href="qwt__double__interval_8h-source.html#l00134">QwtDoubleInterval::maxValue()</a>, <a class="el" href="qwt__double__interval_8h-source.html#l00128">QwtDoubleInterval::minValue()</a>, <a class="el" href="qwt__double__interval_8cpp-source.html#l00028">QwtDoubleInterval::normalized()</a>, <a class="el" href="qwt__scale__engine_8cpp-source.html#l00400">QwtScaleEngine::reference()</a>, <a class="el" href="qwt__scale__engine_8cpp-source.html#l00371">QwtScaleEngine::setAttributes()</a>, <a class="el" href="qwt__scale__engine_8cpp-source.html#l00219">QwtScaleEngine::setMargins()</a>, <a class="el" href="qwt__scale__engine_8cpp-source.html#l00391">QwtScaleEngine::setReference()</a>, and <a class="el" href="qwt__double__interval_8h-source.html#l00146">QwtDoubleInterval::width()</a>.    </td>
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<a class="anchor" name="1d3abcbe5ce63d7f9cfa5a04c028bf55"></a><!-- doxytag: member="QwtLog10ScaleEngine::log10" ref="1d3abcbe5ce63d7f9cfa5a04c028bf55" args="(const QwtDoubleInterval &amp;) const " --><p>
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          <td class="md" nowrap valign="top"><a class="el" href="class_qwt_double_interval.html">QwtDoubleInterval</a> QwtLog10ScaleEngine::log10           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const <a class="el" href="class_qwt_double_interval.html">QwtDoubleInterval</a> &amp;&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>interval</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const<code> [protected]</code></td>
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Return the interval [log10(interval.minValue(), log10(interval.maxValue] 
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Definition at line <a class="el" href="qwt__scale__engine_8cpp-source.html#l00899">899</a> of file <a class="el" href="qwt__scale__engine_8cpp-source.html">qwt_scale_engine.cpp</a>.
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References <a class="el" href="qwt__double__interval_8h-source.html#l00134">QwtDoubleInterval::maxValue()</a>, and <a class="el" href="qwt__double__interval_8h-source.html#l00128">QwtDoubleInterval::minValue()</a>.
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Referenced by <a class="el" href="qwt__scale__engine_8cpp-source.html#l00636">autoScale()</a>, and <a class="el" href="qwt__scale__engine_8cpp-source.html#l00693">divideScale()</a>.    </td>
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<a class="anchor" name="f08b0486afd765554702f4c237302985"></a><!-- doxytag: member="QwtLog10ScaleEngine::pow10" ref="f08b0486afd765554702f4c237302985" args="(const QwtDoubleInterval &amp;) const " --><p>
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          <td class="md" nowrap valign="top"><a class="el" href="class_qwt_double_interval.html">QwtDoubleInterval</a> QwtLog10ScaleEngine::pow10           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const <a class="el" href="class_qwt_double_interval.html">QwtDoubleInterval</a> &amp;&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>interval</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const<code> [protected]</code></td>
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Return the interval [pow10(interval.minValue(), pow10(interval.maxValue] 
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Definition at line <a class="el" href="qwt__scale__engine_8cpp-source.html#l00909">909</a> of file <a class="el" href="qwt__scale__engine_8cpp-source.html">qwt_scale_engine.cpp</a>.
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References <a class="el" href="qwt__double__interval_8h-source.html#l00134">QwtDoubleInterval::maxValue()</a>, and <a class="el" href="qwt__double__interval_8h-source.html#l00128">QwtDoubleInterval::minValue()</a>.    </td>
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<a class="anchor" name="f972778615ea076c8452abea96516ce9"></a><!-- doxytag: member="QwtLog10ScaleEngine::transformation" ref="f972778615ea076c8452abea96516ce9" args="() const " --><p>
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          <td class="md" nowrap valign="top"><a class="el" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a> * QwtLog10ScaleEngine::transformation           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap> const<code> [virtual]</code></td>
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<p>
Return a transformation, for logarithmic (base 10) scales 
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Implements <a class="el" href="class_qwt_scale_engine.html#04a93d0dc39a3483957764e7749989fd">QwtScaleEngine</a>.
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Definition at line <a class="el" href="qwt__scale__engine_8cpp-source.html#l00621">621</a> of file <a class="el" href="qwt__scale__engine_8cpp-source.html">qwt_scale_engine.cpp</a>.    </td>
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