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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>Qwt User's Guide: QwtScaleArithmetic Class Reference</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.6 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li id="current"><a href="classes.html"><span>Classes</span></a></li> <li><a href="files.html"><span>Files</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> </ul></div><div class="tabs"> <ul> <li><a href="classes.html"><span>Alphabetical List</span></a></li> <li><a href="annotated.html"><span>Class List</span></a></li> <li><a href="hierarchy.html"><span>Class Hierarchy</span></a></li> <li><a href="functions.html"><span>Class Members</span></a></li> </ul></div><h1>QwtScaleArithmetic Class Reference</h1><!-- doxytag: class="QwtScaleArithmetic" --><a href="class_qwt_scale_arithmetic-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>Arithmetic including a tolerance. <p><p>Definition at line <a class="el" href="qwt__scale__engine_8h-source.html#l00022">22</a> of file <a class="el" href="qwt__scale__engine_8h-source.html">qwt_scale_engine.h</a>.<table border="0" cellpadding="0" cellspacing="0"><tr><td></td></tr><tr><td colspan="2"><br><h2>Static Public Member Functions</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_arithmetic.html#6c6f982022550fba9ccee034f87461ce">compareEps</a> (double value1, double value2, double intervalSize)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">static double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_arithmetic.html#86da4fc0928457d03201d8b520d7d816">ceilEps</a> (double value, double intervalSize)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">static double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_arithmetic.html#924d97f2e5db236f43f4d65e430e09c1">floorEps</a> (double value, double intervalSize)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="e5f0415105b2a97cccb93f3da9ddaead"></a><!-- doxytag: member="QwtScaleArithmetic::divideEps" ref="e5f0415105b2a97cccb93f3da9ddaead" args="(double interval, double steps)" -->static double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_arithmetic.html#e5f0415105b2a97cccb93f3da9ddaead">divideEps</a> (double interval, double steps)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">static double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_arithmetic.html#5768ab1c30f4fa8f02e3bb83f50fac02">ceil125</a> (double x)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">static double </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_scale_arithmetic.html#0cf6b5993a700cf0f00175486bd57b5b">floor125</a> (double x)</td></tr></table><hr><h2>Member Function Documentation</h2><a class="anchor" name="5768ab1c30f4fa8f02e3bb83f50fac02"></a><!-- doxytag: member="QwtScaleArithmetic::ceil125" ref="5768ab1c30f4fa8f02e3bb83f50fac02" args="(double x)" --><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">double QwtScaleArithmetic::ceil125 </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">double </td> <td class="mdname1" valign="top" nowrap> <em>x</em> </td> <td class="md" valign="top"> ) </td> <td class="md" nowrap><code> [static]</code></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Find the smallest value out of {1,2,5}*10^n with an integer number n which is greater than or equal to x<p><dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>x</em> </td><td>Input value </td></tr> </table></dl><p>Definition at line <a class="el" href="qwt__scale__engine_8cpp-source.html#l00098">98</a> of file <a class="el" href="qwt__scale__engine_8cpp-source.html">qwt_scale_engine.cpp</a>.<p>Referenced by <a class="el" href="qwt__scale__engine_8cpp-source.html#l00233">QwtScaleEngine::divideInterval()</a>. </td> </tr></table><a class="anchor" name="86da4fc0928457d03201d8b520d7d816"></a><!-- doxytag: member="QwtScaleArithmetic::ceilEps" ref="86da4fc0928457d03201d8b520d7d816" args="(double value, double intervalSize)" --><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">double QwtScaleArithmetic::ceilEps </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">double </td> <td class="mdname" nowrap> <em>value</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>double </td> <td class="mdname" nowrap> <em>intervalSize</em></td> </tr> <tr> <td class="md"></td> <td class="md">) </td> <td class="md" colspan="2"><code> [static]</code></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Ceil a value, relative to an interval<p><dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>value</em> </td><td>Value to ceil </td></tr> <tr><td valign="top"></td><td valign="top"><em>intervalSize</em> </td><td>Interval size</td></tr> </table></dl><dl compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_scale_arithmetic.html#924d97f2e5db236f43f4d65e430e09c1">floorEps</a> </dd></dl><p>Definition at line <a class="el" href="qwt__scale__engine_8cpp-source.html#l00050">50</a> of file <a class="el" href="qwt__scale__engine_8cpp-source.html">qwt_scale_engine.cpp</a>.<p>Referenced by <a class="el" href="qwt__scale__engine_8cpp-source.html#l00607">QwtLinearScaleEngine::align()</a>. </td> </tr></table><a class="anchor" name="6c6f982022550fba9ccee034f87461ce"></a><!-- doxytag: member="QwtScaleArithmetic::compareEps" ref="6c6f982022550fba9ccee034f87461ce" args="(double value1, double value2, double intervalSize)" --><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">int QwtScaleArithmetic::compareEps </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">double </td> <td class="mdname" nowrap> <em>value1</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>double </td> <td class="mdname" nowrap> <em>value2</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>double </td> <td class="mdname" nowrap> <em>intervalSize</em></td> </tr> <tr> <td class="md"></td> <td class="md">) </td> <td class="md" colspan="2"><code> [static]</code></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Compare 2 values, relative to an interval. <p>Values are "equal", when : <img class="formulaInl" alt="$\cdot value2 - value1 <= abs(intervalSize * 10e^{-6})$" src="form_0.png"><p><dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>value1</em> </td><td>First value to compare </td></tr> <tr><td valign="top"></td><td valign="top"><em>value2</em> </td><td>Second value to compare </td></tr> <tr><td valign="top"></td><td valign="top"><em>intervalSize</em> </td><td>interval size</td></tr> </table></dl><dl compact><dt><b>Returns:</b></dt><dd>0: if equal, -1: if value2 > value1, 1: if value1 > value2 </dd></dl><p>Definition at line <a class="el" href="qwt__scale__engine_8cpp-source.html#l00028">28</a> of file <a class="el" href="qwt__scale__engine_8cpp-source.html">qwt_scale_engine.cpp</a>.<p>Referenced by <a class="el" href="qwt__scale__engine_8cpp-source.html#l00251">QwtScaleEngine::contains()</a>. </td> </tr></table><a class="anchor" name="0cf6b5993a700cf0f00175486bd57b5b"></a><!-- doxytag: member="QwtScaleArithmetic::floor125" ref="0cf6b5993a700cf0f00175486bd57b5b" args="(double x)" --><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">double QwtScaleArithmetic::floor125 </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">double </td> <td class="mdname1" valign="top" nowrap> <em>x</em> </td> <td class="md" valign="top"> ) </td> <td class="md" nowrap><code> [static]</code></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Find the largest value out of {1,2,5}*10^n with an integer number n which is smaller than or equal to x. <p><dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>x</em> </td><td>Input value </td></tr> </table></dl><p>Definition at line <a class="el" href="qwt__scale__engine_8cpp-source.html#l00126">126</a> of file <a class="el" href="qwt__scale__engine_8cpp-source.html">qwt_scale_engine.cpp</a>. </td> </tr></table><a class="anchor" name="924d97f2e5db236f43f4d65e430e09c1"></a><!-- doxytag: member="QwtScaleArithmetic::floorEps" ref="924d97f2e5db236f43f4d65e430e09c1" args="(double value, double intervalSize)" --><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">double QwtScaleArithmetic::floorEps </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">double </td> <td class="mdname" nowrap> <em>value</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>double </td> <td class="mdname" nowrap> <em>intervalSize</em></td> </tr> <tr> <td class="md"></td> <td class="md">) </td> <td class="md" colspan="2"><code> [static]</code></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Floor a value, relative to an interval<p><dl compact><dt><b>Parameters:</b></dt><dd> <table border="0" cellspacing="2" cellpadding="0"> <tr><td valign="top"></td><td valign="top"><em>value</em> </td><td>Value to floor </td></tr> <tr><td valign="top"></td><td valign="top"><em>intervalSize</em> </td><td>Interval size</td></tr> </table></dl><dl compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_scale_arithmetic.html#924d97f2e5db236f43f4d65e430e09c1">floorEps</a> </dd></dl><p>Definition at line <a class="el" href="qwt__scale__engine_8cpp-source.html#l00067">67</a> of file <a class="el" href="qwt__scale__engine_8cpp-source.html">qwt_scale_engine.cpp</a>.<p>Referenced by <a class="el" href="qwt__scale__engine_8cpp-source.html#l00607">QwtLinearScaleEngine::align()</a>. </td> </tr></table><hr size="1"><address style="align: right;"><small>Generated on Mon Feb 26 21:25:47 2007 for Qwt User's Guide by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.6 </small></address></body></html>⌨️ 快捷键说明
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