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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: QwtAbstractScaleDraw 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>QwtAbstractScaleDraw Class Reference</h1><!-- doxytag: class="QwtAbstractScaleDraw" -->Inheritance diagram for QwtAbstractScaleDraw:<p><center><img src="class_qwt_abstract_scale_draw__inherit__graph.png" border="0" usemap="#_qwt_abstract_scale_draw__inherit__map" alt="Inheritance graph"></center><map name="_qwt_abstract_scale_draw__inherit__map"><area href="class_qwt_round_scale_draw.html" shape="rect" coords="7,83,156,107" alt=""><area href="class_qwt_scale_draw.html" shape="rect" coords="180,83,289,107" alt=""><area href="class_qwt_dial_scale_draw.html" shape="rect" coords="16,157,147,181" alt=""></map><center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center><a href="class_qwt_abstract_scale_draw-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>A abstract base class for drawing scales. <p><a class="el" href="class_qwt_abstract_scale_draw.html">QwtAbstractScaleDraw</a> can be used to draw linear or logarithmic scales.<p>After a scale division has been specified as a <a class="el" href="class_qwt_scale_div.html">QwtScaleDiv</a> object using <a class="el" href="class_qwt_abstract_scale_draw.html#4399aac94a294f5ed6c52114dde00d2f">QwtAbstractScaleDraw::setScaleDiv(const QwtScaleDiv &s)</a>, the scale can be drawn with the <a class="el" href="class_qwt_abstract_scale_draw.html#ca3c3a7499112f52616d0ee8518fa5a6">QwtAbstractScaleDraw::draw()</a> member. <p><p>Definition at line <a class="el" href="qwt__abstract__scale__draw_8h-source.html#l00037">37</a> of file <a class="el" href="qwt__abstract__scale__draw_8h-source.html">qwt_abstract_scale_draw.h</a>.<table border="0" cellpadding="0" cellspacing="0"><tr><td></td></tr><tr><td colspan="2"><br><h2>Public Types</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#26215d06a4d48adf401d0aa05d4193c5">ScaleComponent</a> { <br> <b>Backbone</b> = 1, <br> <b>Ticks</b> = 2, <br> <b>Labels</b> = 4<br> }</td></tr><tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#19c944664a2e36f06ae71b745fbd442e">QwtAbstractScaleDraw</a> ()</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#eac9a71c1aa7f84eb615af72cfbf301c">QwtAbstractScaleDraw</a> (const <a class="el" href="class_qwt_abstract_scale_draw.html">QwtAbstractScaleDraw</a> &)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#dc4d3f491b28ee39d728a4a4a9cdd494">~QwtAbstractScaleDraw</a> ()</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="class_qwt_abstract_scale_draw.html">QwtAbstractScaleDraw</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#fe5c86bd7ebfd879b0a8b715a7c700d4">operator=</a> (const <a class="el" href="class_qwt_abstract_scale_draw.html">QwtAbstractScaleDraw</a> &)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#4399aac94a294f5ed6c52114dde00d2f">setScaleDiv</a> (const <a class="el" href="class_qwt_scale_div.html">QwtScaleDiv</a> &s)</td></tr><tr><td class="memItemLeft" nowrap 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#82510027cd5bee269628c9d6302a19a9">scaleDiv</a> () const </td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#0011367eb32519070e6f276ac393dcfb">setTransformation</a> (<a class="el" href="class_qwt_scale_transformation.html">QwtScaleTransformation</a> *)</td></tr><tr><td class="memItemLeft" nowrap 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#9777f34effee2395dde92a42ef7902fd">map</a> () const </td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#f975410588db6103f281e49d0b43c6a6">enableComponent</a> (<a class="el" href="class_qwt_abstract_scale_draw.html#26215d06a4d48adf401d0aa05d4193c5">ScaleComponent</a>, bool enable=true)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#95d74d9eaa5520754295efb33a4db50f">hasComponent</a> (<a class="el" href="class_qwt_abstract_scale_draw.html#26215d06a4d48adf401d0aa05d4193c5">ScaleComponent</a>) const </td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#05437152e446e9c0f5e912e68269a6a7">setTickLength</a> (<a class="el" href="class_qwt_scale_div.html#f21aedaa886dd5e067cf63505838736c">QwtScaleDiv::TickType</a>, int length)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#d183cd4b9b5b204ca5d264e0f42e06a1">tickLength</a> (<a class="el" href="class_qwt_scale_div.html#f21aedaa886dd5e067cf63505838736c">QwtScaleDiv::TickType</a>) const </td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#70d03241a4502cf546c5075d28658601">majTickLength</a> () const </td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#ed26877e7a6589ba0df1f45a3ed68fc7">setSpacing</a> (int margin)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#b31323219c1a750adde91470698cfa0f">spacing</a> () const </td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#ca3c3a7499112f52616d0ee8518fa5a6">draw</a> (QPainter *, const QPalette &) const </td></tr><tr><td class="memItemLeft" nowrap 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#4ff88bc827dd6c6ca9298de13483b61f">label</a> (double) const </td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#30d94435166524c011765fa75a1ed45f">extent</a> (const QPen &, const QFont &) const =0</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#2a9633476aa1c99e25fa07d87db3e415">setMinimumExtent</a> (int)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#f7b927390d71f291fa03186eff79e201">minimumExtent</a> () const </td></tr><tr><td class="memItemLeft" nowrap 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#e7488eb63ad73a2e69acb29ff069c904">scaleMap</a> ()</td></tr><tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#4adcd2617a57eebfca522661fe89264c">drawTick</a> (QPainter *painter, double value, int len) const =0</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#15994a6033e689c3acdb8d83ae4f2a1c">drawBackbone</a> (QPainter *painter) const =0</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#a78dc8bf05a0224450c947af54128d8d">drawLabel</a> (QPainter *painter, double value) const =0</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_abstract_scale_draw.html#4ed95cd23c5d779c1b05aa5295409aa6">invalidateCache</a> ()</td></tr><tr><td class="memItemLeft" nowrap 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#5e703dcb115a51024f89f92e61c2c8d8">tickLabel</a> (const QFont &, double value) const </td></tr></table><hr><h2>Member Enumeration Documentation</h2><a class="anchor" name="26215d06a4d48adf401d0aa05d4193c5"></a><!-- doxytag: member="QwtAbstractScaleDraw::ScaleComponent" ref="26215d06a4d48adf401d0aa05d4193c5" args="" --><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">enum <a class="el" href="class_qwt_abstract_scale_draw.html#26215d06a4d48adf401d0aa05d4193c5">QwtAbstractScaleDraw::ScaleComponent</a> </td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Components of a scale<p><ul><li>Backbone</li><li>Ticks</li><li>Label</li></ul><p><dl compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#f975410588db6103f281e49d0b43c6a6">QwtAbstractScaleDraw::enableComponent</a>, <a class="el" href="class_qwt_abstract_scale_draw.html#95d74d9eaa5520754295efb33a4db50f">QwtAbstractScaleDraw::hasComponent</a> </dd></dl><p>Definition at line <a class="el" href="qwt__abstract__scale__draw_8h-source.html#l00052">52</a> of file <a class="el" href="qwt__abstract__scale__draw_8h-source.html">qwt_abstract_scale_draw.h</a>. </td> </tr></table><hr><h2>Constructor & Destructor Documentation</h2><a class="anchor" name="19c944664a2e36f06ae71b745fbd442e"></a><!-- doxytag: member="QwtAbstractScaleDraw::QwtAbstractScaleDraw" ref="19c944664a2e36f06ae71b745fbd442e" args="()" --><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">QwtAbstractScaleDraw::QwtAbstractScaleDraw </td> <td class="md" valign="top">( </td> <td class="mdname1" valign="top" nowrap> </td> <td class="md" valign="top"> ) </td> <td class="md" nowrap></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Constructor. <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>Definition at line <a class="el" href="qwt__abstract__scale__draw_8cpp-source.html#l00054">54</a> of file <a class="el" href="qwt__abstract__scale__draw_8cpp-source.html">qwt_abstract_scale_draw.cpp</a>. </td> </tr></table><a class="anchor" name="eac9a71c1aa7f84eb615af72cfbf301c"></a><!-- doxytag: member="QwtAbstractScaleDraw::QwtAbstractScaleDraw" ref="eac9a71c1aa7f84eb615af72cfbf301c" args="(const QwtAbstractScaleDraw &)" --><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">QwtAbstractScaleDraw::QwtAbstractScaleDraw </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">const <a class="el" href="class_qwt_abstract_scale_draw.html">QwtAbstractScaleDraw</a> & </td> <td class="mdname1" valign="top" nowrap> </td> <td class="md" valign="top"> ) </td> <td class="md" nowrap></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Copy constructor. <p><p>Definition at line <a class="el" href="qwt__abstract__scale__draw_8cpp-source.html#l00060">60</a> of file <a class="el" href="qwt__abstract__scale__draw_8cpp-source.html">qwt_abstract_scale_draw.cpp</a>.<p>References <a class="el" href="qwt__abstract__scale__draw_8h-source.html#l00142">d_data</a>. </td> </tr></table><a class="anchor" name="dc4d3f491b28ee39d728a4a4a9cdd494"></a><!-- doxytag: member="QwtAbstractScaleDraw::~QwtAbstractScaleDraw" ref="dc4d3f491b28ee39d728a4a4a9cdd494" args="()" --><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">QwtAbstractScaleDraw::~QwtAbstractScaleDraw </td> <td class="md" valign="top">( </td> <td class="mdname1" valign="top" nowrap> </td> <td class="md" valign="top"> ) </td> <td class="md" nowrap><code> [virtual]</code></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Destructor. <p><p>Definition at line <a class="el" href="qwt__abstract__scale__draw_8cpp-source.html#l00066">66</a> of file <a class="el" href="qwt__abstract__scale__draw_8cpp-source.html">qwt_abstract_scale_draw.cpp</a>. </td> </tr></table><hr><h2>Member Function Documentation</h2><a class="anchor" name="ca3c3a7499112f52616d0ee8518fa5a6"></a><!-- doxytag: member="QwtAbstractScaleDraw::draw" ref="ca3c3a7499112f52616d0ee8518fa5a6" args="(QPainter *, const QPalette &) const " --><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">void QwtAbstractScaleDraw::draw </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">QPainter * </td> <td class="mdname" nowrap> <em>painter</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>const QPalette & </td> <td class="mdname" nowrap> <em>palette</em></td> </tr> <tr> <td class="md"></td> <td class="md">) </td> <td class="md" colspan="2"> const<code> [virtual]</code></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Draw the scale. <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>painter</em> </td><td>The painter</td></tr> <tr><td valign="top"></td><td valign="top"><em>palette</em> </td><td>Palette, text color is used for the labels, foreground color for ticks and backbone </td></tr> </table></dl><p>Definition at line <a class="el" href="qwt__abstract__scale__draw_8cpp-source.html#l00164">164</a> of file <a class="el" href="qwt__abstract__scale__draw_8cpp-source.html">qwt_abstract_scale_draw.cpp</a>.<p>Referenced by <a class="el" href="qwt__thermo_8cpp-source.html#l00183">QwtThermo::draw()</a>, <a class="el" href="qwt__slider_8cpp-source.html#l00517">QwtSlider::draw()</a>, and <a class="el" href="qwt__knob_8cpp-source.html#l00382">QwtKnob::draw()</a>. </td> </tr></table><a class="anchor" name="15994a6033e689c3acdb8d83ae4f2a1c"></a><!-- doxytag: member="QwtAbstractScaleDraw::drawBackbone" ref="15994a6033e689c3acdb8d83ae4f2a1c" args="(QPainter *painter) const =0" --><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow">⌨️ 快捷键说明
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