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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: QwtDialNeedle 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>QwtDialNeedle Class Reference</h1><!-- doxytag: class="QwtDialNeedle" -->Inheritance diagram for QwtDialNeedle:<p><center><img src="class_qwt_dial_needle__inherit__graph.png" border="0" usemap="#_qwt_dial_needle__inherit__map" alt="Inheritance graph"></center><map name="_qwt_dial_needle__inherit__map"><area href="class_qwt_compass_magnet_needle.html" shape="rect" coords="7,83,194,107" alt=""><area href="class_qwt_compass_wind_arrow.html" shape="rect" coords="218,83,383,107" alt=""><area href="class_qwt_dial_simple_needle.html" shape="rect" coords="407,83,556,107" alt=""></map><center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center><a href="class_qwt_dial_needle-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>Base class for needles that can be used in a <a class="el" href="class_qwt_dial.html">QwtDial</a>. <p><a class="el" href="class_qwt_dial_needle.html">QwtDialNeedle</a> is a pointer that indicates a value by pointing to a specific direction.<p>Qwt is missing a set of good looking needles. Contributions are very welcome.<p><dl compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_dial.html">QwtDial</a>, <a class="el" href="class_qwt_compass.html">QwtCompass</a> </dd></dl><p><p>Definition at line <a class="el" href="qwt__dial__needle_8h-source.html#l00031">31</a> of file <a class="el" href="qwt__dial__needle_8h-source.html">qwt_dial_needle.h</a>.<table border="0" cellpadding="0" cellspacing="0"><tr><td></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_dial_needle.html#ef3af79632ce784bc4d7332f6e269a1f">QwtDialNeedle</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_dial_needle.html#c23b2af4af50042967c8cea87b474247">~QwtDialNeedle</a> ()</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_dial_needle.html#6076eecfa9fc39235435d098cf146a2c">draw</a> (QPainter *painter, const QPoint &center, int length, double direction, QPalette::ColorGroup cg=QPalette::Active) 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_dial_needle.html#e850883a64501136bca64d6ea2d084b9">setPalette</a> (const QPalette &)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">const QPalette & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_dial_needle.html#8b3c915032389261e07cc983b433166c">palette</a> () const </td></tr><tr><td colspan="2"><br><h2>Static Protected Member Functions</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_dial_needle.html#5ff7738a4ce55551b0949a55b145662f">drawKnob</a> (QPainter *, const QPoint &pos, int width, const QBrush &, bool sunken)</td></tr></table><hr><h2>Constructor & Destructor Documentation</h2><a class="anchor" name="ef3af79632ce784bc4d7332f6e269a1f"></a><!-- doxytag: member="QwtDialNeedle::QwtDialNeedle" ref="ef3af79632ce784bc4d7332f6e269a1f" 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">QwtDialNeedle::QwtDialNeedle </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><p>Definition at line <a class="el" href="qwt__dial__needle_8cpp-source.html#l00025">25</a> of file <a class="el" href="qwt__dial__needle_8cpp-source.html">qwt_dial_needle.cpp</a>. </td> </tr></table><a class="anchor" name="c23b2af4af50042967c8cea87b474247"></a><!-- doxytag: member="QwtDialNeedle::~QwtDialNeedle" ref="c23b2af4af50042967c8cea87b474247" 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">QwtDialNeedle::~QwtDialNeedle </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__dial__needle_8cpp-source.html#l00031">31</a> of file <a class="el" href="qwt__dial__needle_8cpp-source.html">qwt_dial_needle.cpp</a>. </td> </tr></table><hr><h2>Member Function Documentation</h2><a class="anchor" name="6076eecfa9fc39235435d098cf146a2c"></a><!-- doxytag: member="QwtDialNeedle::draw" ref="6076eecfa9fc39235435d098cf146a2c" args="(QPainter *painter, const QPoint &center, int length, double direction, QPalette::ColorGroup cg=QPalette::Active) const =0" --><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">virtual void QwtDialNeedle::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 QPoint & </td> <td class="mdname" nowrap> <em>center</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>int </td> <td class="mdname" nowrap> <em>length</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>direction</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>QPalette::ColorGroup </td> <td class="mdname" nowrap> <em>cg</em> = <code>QPalette::Active</code></td> </tr> <tr> <td class="md"></td> <td class="md">) </td> <td class="md" colspan="2"> const<code> [pure virtual]</code></td> </tr> </table> </td> </tr>⌨️ 快捷键说明
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