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<title>Qwt User's Guide: QwtDialNeedle Class Reference</title>
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<div id="projectname">Qwt User's Guide <span id="projectnumber">6.0.0</span></div>
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<a href="#pub-methods">Public Member Functions</a> |
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<h1>QwtDialNeedle Class Reference</h1> </div>
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<!-- doxytag: class="QwtDialNeedle" -->
<p>Base class for needles that can be used in a <a class="el" href="class_qwt_dial.html" title="QwtDial class provides a rounded range control.">QwtDial</a>.
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="qwt__dial__needle_8h_source.html">qwt_dial_needle.h</a>></code></p>
<div class="dynheader">
Inheritance diagram for QwtDialNeedle:</div>
<div class="dyncontent">
<div class="center"><img src="class_qwt_dial_needle__inherit__graph.png" border="0" usemap="#_qwt_dial_needle_inherit__map" alt="Inheritance graph"/></div>
<map name="_qwt_dial_needle_inherit__map" id="_qwt_dial_needle_inherit__map">
<area shape="rect" id="node3" href="class_qwt_compass_magnet_needle.html" title="A magnet needle for compass widgets." alt="" coords="5,86,187,117"/><area shape="rect" id="node5" href="class_qwt_compass_wind_arrow.html" title="An indicator for the wind direction." alt="" coords="211,86,373,117"/><area shape="rect" id="node7" href="class_qwt_dial_simple_needle.html" title="A needle for dial widgets." alt="" coords="397,86,544,117"/></map>
<center><span class="legend">[<a href="graph_legend.html">legend</a>]</span></center></div>
<p><a href="class_qwt_dial_needle-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_dial_needle.html#aef3af79632ce784bc4d7332f6e269a1f">QwtDialNeedle</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_dial_needle.html#ac23b2af4af50042967c8cea87b474247">~QwtDialNeedle</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_dial_needle.html#ae850883a64501136bca64d6ea2d084b9">setPalette</a> (const QPalette &)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const QPalette & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_dial_needle.html#a8b3c915032389261e07cc983b433166c">palette</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_dial_needle.html#a425085086c4a8c7baff10b161616ee42">draw</a> (QPainter *painter, const QPointF &center, double length, double direction, QPalette::ColorGroup=QPalette::Active) const </td></tr>
<tr><td colspan="2"><h2><a name="pro-methods"></a>
Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_dial_needle.html#a1e4fee366fec1838edc18890d9957f2b">drawNeedle</a> (QPainter *painter, double length, QPalette::ColorGroup colorGroup) const =0</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_dial_needle.html#aaca9572717a1db10b1b6609571024688">drawKnob</a> (QPainter *, double width, const QBrush &, bool sunken) const </td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Base class for needles that can be used in a <a class="el" href="class_qwt_dial.html" title="QwtDial class provides a rounded range control.">QwtDial</a>. </p>
<p><a class="el" href="class_qwt_dial_needle.html" title="Base class for needles that can be used in a QwtDial.">QwtDialNeedle</a> is a pointer that indicates a value by pointing to a specific direction.</p>
<p>Qwt is missing a set of good looking needles. Contributions are very welcome.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_dial.html" title="QwtDial class provides a rounded range control.">QwtDial</a>, <a class="el" href="class_qwt_compass.html" title="A Compass Widget.">QwtCompass</a> </dd></dl>
</div><hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="aef3af79632ce784bc4d7332f6e269a1f"></a><!-- doxytag: member="QwtDialNeedle::QwtDialNeedle" ref="aef3af79632ce784bc4d7332f6e269a1f" args="()" -->
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<td class="memname">QwtDialNeedle::QwtDialNeedle </td>
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<td class="paramname"></td><td>)</td>
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<p>Constructor. </p>
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<a class="anchor" id="ac23b2af4af50042967c8cea87b474247"></a><!-- doxytag: member="QwtDialNeedle::~QwtDialNeedle" ref="ac23b2af4af50042967c8cea87b474247" args="()" -->
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<td class="memname">QwtDialNeedle::~QwtDialNeedle </td>
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<td class="paramname"></td><td>)</td>
<td><code> [virtual]</code></td>
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<p>Destructor. </p>
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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a425085086c4a8c7baff10b161616ee42"></a><!-- doxytag: member="QwtDialNeedle::draw" ref="a425085086c4a8c7baff10b161616ee42" args="(QPainter *painter, const QPointF &center, double length, double direction, QPalette::ColorGroup=QPalette::Active) const " -->
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<td class="memname">void QwtDialNeedle::draw </td>
<td>(</td>
<td class="paramtype">QPainter * </td>
<td class="paramname"><em>painter</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const QPointF & </td>
<td class="paramname"><em>center</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"><em>length</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">double </td>
<td class="paramname"><em>direction</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">QPalette::ColorGroup </td>
<td class="paramname"><em>colorGroup</em> = <code>QPalette::Active</code> </td>
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<td></td>
<td>)</td>
<td></td><td> const<code> [virtual]</code></td>
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<p>Draw the needle</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">painter</td><td>Painter </td></tr>
<tr><td class="paramname">center</td><td>Center of the dial, start position for the needle </td></tr>
<tr><td class="paramname">length</td><td>Length of the needle </td></tr>
<tr><td class="paramname">direction</td><td>Direction of the needle, in degrees counter clockwise </td></tr>
<tr><td class="paramname">colorGroup</td><td>Color group, used for painting </td></tr>
</table>
</dd>
</dl>
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<a class="anchor" id="aaca9572717a1db10b1b6609571024688"></a><!-- doxytag: member="QwtDialNeedle::drawKnob" ref="aaca9572717a1db10b1b6609571024688" args="(QPainter *, double width, const QBrush &, bool sunken) const " -->
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<td class="memname">void QwtDialNeedle::drawKnob </td>
<td>(</td>
<td class="paramtype">QPainter * </td>
<td class="paramname"><em>painter</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>width</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const QBrush & </td>
<td class="paramname"><em>brush</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"><em>sunken</em> </td>
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<td></td>
<td>)</td>
<td></td><td> const<code> [protected, virtual]</code></td>
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<p>Draw the knob. </p>
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</div>
<a class="anchor" id="a1e4fee366fec1838edc18890d9957f2b"></a><!-- doxytag: member="QwtDialNeedle::drawNeedle" ref="a1e4fee366fec1838edc18890d9957f2b" args="(QPainter *painter, double length, QPalette::ColorGroup colorGroup) const =0" -->
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<td class="memname">virtual void QwtDialNeedle::drawNeedle </td>
<td>(</td>
<td class="paramtype">QPainter * </td>
<td class="paramname"><em>painter</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>length</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">QPalette::ColorGroup </td>
<td class="paramname"><em>colorGroup</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td> const<code> [protected, pure virtual]</code></td>
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<p>Draw the needle. </p>
<p>The origin of the needle is at position (0.0, 0.0 ) pointing in direction 0.0 ( = east ).</p>
<p>The painter is already initilaized with translation and rotation.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">painter</td><td>Painter </td></tr>
<tr><td class="paramname">length</td><td>Length of the needle </td></tr>
<tr><td class="paramname">colorGroup</td><td>Color group, used for painting</td></tr>
</table>
</dd>
</dl>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_dial_needle.html#ae850883a64501136bca64d6ea2d084b9">setPalette()</a>, <a class="el" href="class_qwt_dial_needle.html#a8b3c915032389261e07cc983b433166c">palette()</a> </dd></dl>
<p>Implemented in <a class="el" href="class_qwt_dial_simple_needle.html#a0eff8832707ff968d17eddf478d6a771">QwtDialSimpleNeedle</a>, <a class="el" href="class_qwt_compass_magnet_needle.html#aa052d929a09bfc6d487a973b2221d44d">QwtCompassMagnetNeedle</a>, and <a class="el" href="class_qwt_compass_wind_arrow.html#a4e3b612f2de83ff416e34f62c1f0fd6c">QwtCompassWindArrow</a>.</p>
</div>
</div>
<a class="anchor" id="a8b3c915032389261e07cc983b433166c"></a><!-- doxytag: member="QwtDialNeedle::palette" ref="a8b3c915032389261e07cc983b433166c" args="() const " -->
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<td class="memname">const QPalette & QwtDialNeedle::palette </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
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</div>
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<dl class="return"><dt><b>Returns:</b></dt><dd>the palette of the needle. </dd></dl>
</div>
</div>
<a class="anchor" id="ae850883a64501136bca64d6ea2d084b9"></a><!-- doxytag: member="QwtDialNeedle::setPalette" ref="ae850883a64501136bca64d6ea2d084b9" args="(const QPalette &)" -->
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<td class="memname">void QwtDialNeedle::setPalette </td>
<td>(</td>
<td class="paramtype">const QPalette & </td>
<td class="paramname"><em>palette</em></td><td>)</td>
<td><code> [virtual]</code></td>
</tr>
</table>
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<div class="memdoc">
<p>Sets the palette for the needle.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">palette</td><td>New Palette </td></tr>
</table>
</dd>
</dl>
</div>
</div>
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