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<h1>QwtRoundScaleDraw Class Reference</h1><!-- doxytag: class="QwtRoundScaleDraw" --><!-- doxytag: inherits="QwtAbstractScaleDraw" -->A class for drawing round scales.
<a href="#_details">More...</a>
<p>
<code>#include <<a class="el" href="qwt__round__scale__draw_8h-source.html">qwt_round_scale_draw.h</a>></code>
<p>
<div class="dynheader">
Inheritance diagram for QwtRoundScaleDraw:</div>
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<p><center><img src="class_qwt_round_scale_draw__inherit__graph.png" border="0" usemap="#_qwt_round_scale_draw__inherit__map" alt="Inheritance graph"></center>
<map name="_qwt_round_scale_draw__inherit__map">
<area shape="rect" href="class_qwt_dial_scale_draw.html" title="A special scale draw made for QwtDial." alt="" coords="19,157,152,181"><area shape="rect" href="class_qwt_abstract_scale_draw.html" title="A abstract base class for drawing scales." alt="" coords="7,8,164,32"></map>
<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center></div>
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<a href="class_qwt_round_scale_draw-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
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<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_round_scale_draw.html#9c44d19488567825d826528b701587c8">QwtRoundScaleDraw</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_round_scale_draw.html#d6237d352a7004166dacfe644bfc4308">QwtRoundScaleDraw</a> (const <a class="el" href="class_qwt_round_scale_draw.html">QwtRoundScaleDraw</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_round_scale_draw.html#81583432e629cd8a14524b05fabb4731">~QwtRoundScaleDraw</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="class_qwt_round_scale_draw.html">QwtRoundScaleDraw</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_round_scale_draw.html#dc6fc2de0c09ea6b70258a129fecac3a">operator=</a> (const <a class="el" href="class_qwt_round_scale_draw.html">QwtRoundScaleDraw</a> &other)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_round_scale_draw.html#069d658989db2ad96f26b79a298f7d10">setRadius</a> (int radius)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_round_scale_draw.html#2eb03d12749a44f7ca8a8ff92514dd56">radius</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_round_scale_draw.html#fe2226d225c3d7f50a85a80c86f5eb6e">moveCenter</a> (int x, int y)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_round_scale_draw.html#536cdecd6046e4a8434e117c9cd5c180">moveCenter</a> (const QPoint &)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QPoint </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_round_scale_draw.html#79346d7551aa877667a104863f9a198e">center</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_round_scale_draw.html#5d85678fdb9fbb4d622425aab9ecc681">setAngleRange</a> (double angle1, double angle2)</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_round_scale_draw.html#50f5d69dceab6ccf5e00bd2a7953d897">extent</a> (const QPen &, const QFont &) const </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_round_scale_draw.html#a4f77a6cbb019ca42f857bf2019acff2">drawTick</a> (QPainter *p, double val, int len) 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_round_scale_draw.html#845dc48b006ee168415112f39e80da09">drawBackbone</a> (QPainter *p) 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_round_scale_draw.html#a43bf3624c464727bb4f0cab28c3f6fe">drawLabel</a> (QPainter *p, double val) const </td></tr>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
A class for drawing round scales.
<p>
<a class="el" href="class_qwt_round_scale_draw.html" title="A class for drawing round scales.">QwtRoundScaleDraw</a> can be used to draw round scales. The circle segment can be adjusted by <a class="el" href="class_qwt_round_scale_draw.html#5d85678fdb9fbb4d622425aab9ecc681" title="Adjust the baseline circle segment for round scales.">QwtRoundScaleDraw::setAngleRange()</a>. The geometry of the scale can be specified with <a class="el" href="class_qwt_round_scale_draw.html#fe2226d225c3d7f50a85a80c86f5eb6e" title="Move the center of the scale draw, leaving the radius unchanged.">QwtRoundScaleDraw::moveCenter()</a> and <a class="el" href="class_qwt_round_scale_draw.html#069d658989db2ad96f26b79a298f7d10">QwtRoundScaleDraw::setRadius()</a>.<p>
After a scale division has been specified as a <a class="el" href="class_qwt_scale_div.html" title="A class representing a scale division.">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" title="Draw the scale.">QwtAbstractScaleDraw::draw()</a> member. <hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="9c44d19488567825d826528b701587c8"></a><!-- doxytag: member="QwtRoundScaleDraw::QwtRoundScaleDraw" ref="9c44d19488567825d826528b701587c8" args="()" -->
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<td class="memname">QwtRoundScaleDraw::QwtRoundScaleDraw </td>
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<p>
Constructor.
<p>
The range of the scale is initialized to [0, 100], The center is set to (50, 50) with a radius of 50. The angle range is set to [-135, 135].
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<a class="anchor" name="d6237d352a7004166dacfe644bfc4308"></a><!-- doxytag: member="QwtRoundScaleDraw::QwtRoundScaleDraw" ref="d6237d352a7004166dacfe644bfc4308" args="(const QwtRoundScaleDraw &)" -->
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<td class="memname">QwtRoundScaleDraw::QwtRoundScaleDraw </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_qwt_round_scale_draw.html">QwtRoundScaleDraw</a> & </td>
<td class="paramname"> <em>other</em> </td>
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<p>
Copy constructor.
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<a class="anchor" name="81583432e629cd8a14524b05fabb4731"></a><!-- doxytag: member="QwtRoundScaleDraw::~QwtRoundScaleDraw" ref="81583432e629cd8a14524b05fabb4731" args="()" -->
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<td class="memname">QwtRoundScaleDraw::~QwtRoundScaleDraw </td>
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<td><code> [virtual]</code></td>
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<p>
Destructor.
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<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="79346d7551aa877667a104863f9a198e"></a><!-- doxytag: member="QwtRoundScaleDraw::center" ref="79346d7551aa877667a104863f9a198e" args="() const " -->
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<td class="memname">QPoint QwtRoundScaleDraw::center </td>
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<td class="paramname"> </td>
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<td> const</td>
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<p>
Get the center of the scale.
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<a class="anchor" name="845dc48b006ee168415112f39e80da09"></a><!-- doxytag: member="QwtRoundScaleDraw::drawBackbone" ref="845dc48b006ee168415112f39e80da09" args="(QPainter *p) const " -->
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<td class="memname">void QwtRoundScaleDraw::drawBackbone </td>
<td>(</td>
<td class="paramtype">QPainter * </td>
<td class="paramname"> <em>painter</em> </td>
<td> ) </td>
<td> const<code> [protected, virtual]</code></td>
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<p>
Draws the baseline of the scale <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>Painter</td></tr>
</table>
</dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_round_scale_draw.html#a4f77a6cbb019ca42f857bf2019acff2">drawTick()</a>, <a class="el" href="class_qwt_round_scale_draw.html#a43bf3624c464727bb4f0cab28c3f6fe">drawLabel()</a> </dd></dl>
<p>Implements <a class="el" href="class_qwt_abstract_scale_draw.html#15994a6033e689c3acdb8d83ae4f2a1c">QwtAbstractScaleDraw</a>.</p>
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<a class="anchor" name="a43bf3624c464727bb4f0cab28c3f6fe"></a><!-- doxytag: member="QwtRoundScaleDraw::drawLabel" ref="a43bf3624c464727bb4f0cab28c3f6fe" args="(QPainter *p, double val) const " -->
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<td class="memname">void QwtRoundScaleDraw::drawLabel </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">double </td>
<td class="paramname"> <em>value</em></td><td> </td>
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<td>)</td>
<td></td><td></td><td> const<code> [protected, virtual]</code></td>
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<p>
Draws the label for a major scale tick<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>Painter </td></tr>
<tr><td valign="top"></td><td valign="top"><em>value</em> </td><td>Value</td></tr>
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</dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_round_scale_draw.html#a4f77a6cbb019ca42f857bf2019acff2">drawTick()</a>, <a class="el" href="class_qwt_round_scale_draw.html#845dc48b006ee168415112f39e80da09">drawBackbone()</a> </dd></dl>
<p>Implements <a class="el" href="class_qwt_abstract_scale_draw.html#a78dc8bf05a0224450c947af54128d8d">QwtAbstractScaleDraw</a>.</p>
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<a class="anchor" name="a4f77a6cbb019ca42f857bf2019acff2"></a><!-- doxytag: member="QwtRoundScaleDraw::drawTick" ref="a4f77a6cbb019ca42f857bf2019acff2" args="(QPainter *p, double val, int len) const " -->
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<td class="memname">void QwtRoundScaleDraw::drawTick </td>
<td>(</td>
<td class="paramtype">QPainter * </td>
<td class="paramname"> <em>painter</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"> <em>value</em>, </td>
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<td class="paramtype">int </td>
<td class="paramname"> <em>len</em></td><td> </td>
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<td>)</td>
<td></td><td></td><td> const<code> [protected, virtual]</code></td>
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<p>
Draw a tick<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>Painter </td></tr>
<tr><td valign="top"></td><td valign="top"><em>value</em> </td><td>Value of the tick </td></tr>
<tr><td valign="top"></td><td valign="top"><em>len</em> </td><td>Lenght of the tick</td></tr>
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<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_round_scale_draw.html#845dc48b006ee168415112f39e80da09">drawBackbone()</a>, <a class="el" href="class_qwt_round_scale_draw.html#a43bf3624c464727bb4f0cab28c3f6fe">drawLabel()</a> </dd></dl>
<p>Implements <a class="el" href="class_qwt_abstract_scale_draw.html#4adcd2617a57eebfca522661fe89264c">QwtAbstractScaleDraw</a>.</p>
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<a class="anchor" name="50f5d69dceab6ccf5e00bd2a7953d897"></a><!-- doxytag: member="QwtRoundScaleDraw::extent" ref="50f5d69dceab6ccf5e00bd2a7953d897" args="(const QPen &, const QFont &) const " -->
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<td class="memname">int QwtRoundScaleDraw::extent </td>
<td>(</td>
<td class="paramtype">const QPen & </td>
<td class="paramname"> <em>pen</em>, </td>
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<td class="paramname"> <em>font</em></td><td> </td>
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<p>
Calculate the extent of the scale<p>
The extent is the distcance between the baseline to the outermost pixel of the scale draw. <a class="el" href="class_qwt_round_scale_draw.html#2eb03d12749a44f7ca8a8ff92514dd56">radius()</a> + <a class="el" href="class_qwt_round_scale_draw.html#50f5d69dceab6ccf5e00bd2a7953d897">extent()</a> is an upper limit for the radius of the bounding circle.<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>pen</em> </td><td>Pen that is used for painting backbone and ticks </td></tr>
<tr><td valign="top"></td><td valign="top"><em>font</em> </td><td>Font used for painting the labels</td></tr>
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<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_abstract_scale_draw.html#2a9633476aa1c99e25fa07d87db3e415" title="Set a minimum for the extent.">setMinimumExtent()</a>, <a class="el" href="class_qwt_abstract_scale_draw.html#f7b927390d71f291fa03186eff79e201">minimumExtent()</a> </dd></dl>
<dl class="warning" compact><dt><b>Warning:</b></dt><dd>The implemented algo is not too smart and calculates only an upper limit, that might be a few pixels too large </dd></dl>
<p>Implements <a class="el" href="class_qwt_abstract_scale_draw.html#30d94435166524c011765fa75a1ed45f">QwtAbstractScaleDraw</a>.</p>
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<a class="anchor" name="536cdecd6046e4a8434e117c9cd5c180"></a><!-- doxytag: member="QwtRoundScaleDraw::moveCenter" ref="536cdecd6046e4a8434e117c9cd5c180" args="(const QPoint &)" -->
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<td class="memname">void QwtRoundScaleDraw::moveCenter </td>
<td>(</td>
<td class="paramtype">const QPoint & </td>
<td class="paramname"> <em>center</em> </td>
<td> ) </td>
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<p>
Move the center of the scale draw, leaving the radius unchanged<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>center</em> </td><td>New center </td></tr>
</table>
</dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_round_scale_draw.html#069d658989db2ad96f26b79a298f7d10">setRadius()</a> </dd></dl>
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<a class="anchor" name="fe2226d225c3d7f50a85a80c86f5eb6e"></a><!-- doxytag: member="QwtRoundScaleDraw::moveCenter" ref="fe2226d225c3d7f50a85a80c86f5eb6e" args="(int x, int y)" -->
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<td class="memname">void QwtRoundScaleDraw::moveCenter </td>
<td>(</td>
<td class="paramtype">int </td>
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<td class="paramtype">int </td>
<td class="paramname"> <em>y</em></td><td> </td>
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<td>)</td>
<td></td><td></td><td><code> [inline]</code></td>
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<p>
Move the center of the scale draw, leaving the radius unchanged.
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<a class="anchor" name="dc6fc2de0c09ea6b70258a129fecac3a"></a><!-- doxytag: member="QwtRoundScaleDraw::operator=" ref="dc6fc2de0c09ea6b70258a129fecac3a" args="(const QwtRoundScaleDraw &other)" -->
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<td class="memname"><a class="el" href="class_qwt_round_scale_draw.html">QwtRoundScaleDraw</a> & QwtRoundScaleDraw::operator= </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_qwt_round_scale_draw.html">QwtRoundScaleDraw</a> & </td>
<td class="paramname"> <em>other</em> </td>
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<p>
Assignment operator.
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<a class="anchor" name="2eb03d12749a44f7ca8a8ff92514dd56"></a><!-- doxytag: member="QwtRoundScaleDraw::radius" ref="2eb03d12749a44f7ca8a8ff92514dd56" args="() const " -->
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<td class="memname">int QwtRoundScaleDraw::radius </td>
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<p>
Get the radius<p>
Radius is the radius of the backbone without ticks and labels.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_round_scale_draw.html#069d658989db2ad96f26b79a298f7d10">setRadius()</a>, <a class="el" href="class_qwt_round_scale_draw.html#50f5d69dceab6ccf5e00bd2a7953d897">extent()</a> </dd></dl>
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<a class="anchor" name="5d85678fdb9fbb4d622425aab9ecc681"></a><!-- doxytag: member="QwtRoundScaleDraw::setAngleRange" ref="5d85678fdb9fbb4d622425aab9ecc681" args="(double angle1, double angle2)" -->
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<td class="memname">void QwtRoundScaleDraw::setAngleRange </td>
<td>(</td>
<td class="paramtype">double </td>
<td class="paramname"> <em>angle1</em>, </td>
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<td class="paramtype">double </td>
<td class="paramname"> <em>angle2</em></td><td> </td>
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<td></td>
<td>)</td>
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<p>
Adjust the baseline circle segment for round scales.
<p>
The baseline will be drawn from min(angle1,angle2) to max(angle1, angle2). The default setting is [ -135, 135 ]. An angle of 0 degrees corresponds to the 12 o'clock position, and positive angles count in a clockwise direction. <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>angle1</em> </td><td></td></tr>
<tr><td valign="top"></td><td valign="top"><em>angle2</em> </td><td>boundaries of the angle interval in degrees. </td></tr>
</table>
</dl>
<dl class="warning" compact><dt><b>Warning:</b></dt><dd><ul>
<li>
The angle range is limited to [-360, 360] degrees. Angles exceeding this range will be clipped. </li>
<li>
For angles more than 359 degrees above or below min(angle1, angle2), scale marks will not be drawn. </li>
<li>
If you need a counterclockwise scale, use QwtScaleDiv::setRange </li>
</ul>
</dd></dl>
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</div><p>
<a class="anchor" name="069d658989db2ad96f26b79a298f7d10"></a><!-- doxytag: member="QwtRoundScaleDraw::setRadius" ref="069d658989db2ad96f26b79a298f7d10" args="(int radius)" -->
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<td class="memname">void QwtRoundScaleDraw::setRadius </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>radius</em> </td>
<td> ) </td>
<td></td>
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<p>
Change of radius the scale<p>
Radius is the radius of the backbone without ticks and labels.<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>radius</em> </td><td>New Radius </td></tr>
</table>
</dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_round_scale_draw.html#fe2226d225c3d7f50a85a80c86f5eb6e" title="Move the center of the scale draw, leaving the radius unchanged.">moveCenter()</a> </dd></dl>
</div>
</div><p>
</div>
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