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<h1>qwt_dial_needle.cpp</h1><pre class="fragment"><div>00001 <span class="comment">/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************</span>
00002 <span class="comment"> * Qwt Widget Library</span>
00003 <span class="comment"> * Copyright (C) 1997   Josef Wilgen</span>
00004 <span class="comment"> * Copyright (C) 2002   Uwe Rathmann</span>
00005 <span class="comment"> *</span>
00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
00007 <span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span>
00008 <span class="comment"> *****************************************************************************/</span>
00009 
00010 <span class="preprocessor">#include &lt;math.h&gt;</span>
00011 <span class="preprocessor">#include &lt;qapplication.h&gt;</span>
00012 <span class="preprocessor">#include &lt;qpainter.h&gt;</span>
00013 <span class="preprocessor">#include "<a class="code" href="qwt__math_8h.html">qwt_math.h</a>"</span>
00014 <span class="preprocessor">#include "qwt_painter.h"</span>
00015 <span class="preprocessor">#include "qwt_dial_needle.h"</span>
00016 
<a name="l00018"></a><a class="code" href="class_qwt_dial_needle.html#a0">00018</a> <a class="code" href="class_qwt_dial_needle.html#a0">QwtDialNeedle::QwtDialNeedle</a>():
00019     d_palette(QApplication::palette())
00020 {
00021 }
00022 
<a name="l00024"></a><a class="code" href="class_qwt_dial_needle.html#a1">00024</a> <a class="code" href="class_qwt_dial_needle.html#a1">QwtDialNeedle::~QwtDialNeedle</a>() 
00025 {
00026 }
00027 
<a name="l00033"></a><a class="code" href="class_qwt_dial_needle.html#a3">00033</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial_needle.html#a3">QwtDialNeedle::setPalette</a>(<span class="keyword">const</span> QPalette &amp;palette) 
00034 { 
00035     d_palette = palette; 
00036 }
00037 
<a name="l00041"></a><a class="code" href="class_qwt_dial_needle.html#a4">00041</a> <span class="keyword">const</span> QPalette &amp;<a class="code" href="class_qwt_dial_needle.html#a4">QwtDialNeedle::palette</a>()<span class="keyword"> const </span>
00042 <span class="keyword"></span>{ 
00043     <span class="keywordflow">return</span> d_palette; 
00044 }
00045 
<a name="l00047"></a><a class="code" href="class_qwt_dial_needle.html#f0">00047</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial_needle.html#f0">QwtDialNeedle::drawKnob</a>(QPainter *painter,
00048     <span class="keyword">const</span> QPoint &amp;pos, <span class="keywordtype">int</span> width, <span class="keyword">const</span> QBrush &amp;brush, <span class="keywordtype">bool</span> sunken)
00049 {
00050     painter-&gt;save();
00051 
00052     QRect rect(0, 0, width, width);
00053     rect.moveCenter(pos);
00054 
00055     painter-&gt;setPen(Qt::NoPen);
00056     painter-&gt;setBrush(brush);
00057     painter-&gt;drawEllipse(rect);
00058 
00059     painter-&gt;setBrush(Qt::NoBrush);
00060 
00061     <span class="keyword">const</span> <span class="keywordtype">int</span> colorOffset = 20;
00062 
00063     <span class="keywordtype">int</span> startAngle = 45;
00064     <span class="keywordflow">if</span> ( sunken )
00065         startAngle += 180;
00066 
00067     QPen pen;
00068     pen.setWidth(1);
00069 
00070     pen.setColor(brush.color().dark(100 - colorOffset));
00071     painter-&gt;setPen(pen);
00072     painter-&gt;drawArc(rect, startAngle * 16, 180 * 16);
00073 
00074     pen.setColor(brush.color().dark(100 + colorOffset));
00075     painter-&gt;setPen(pen);
00076     painter-&gt;drawArc(rect, (startAngle + 180) * 16, 180 * 16);
00077 
00078     painter-&gt;restore();
00079 }
00080 
<a name="l00085"></a><a class="code" href="class_qwt_dial_needle.html#b0">00085</a> <span class="keyword">const</span> QColorGroup &amp;<a class="code" href="class_qwt_dial_needle.html#b0">QwtDialNeedle::colorGroup</a>(QPalette::ColorGroup cg)<span class="keyword"> const</span>
00086 <span class="keyword"></span>{
00087     <span class="keywordflow">switch</span>(cg)
00088     {
00089         <span class="keywordflow">case</span> QPalette::Disabled:
00090             <span class="keywordflow">return</span> d_palette.disabled();
00091         <span class="keywordflow">case</span> QPalette::Inactive:
00092             <span class="keywordflow">return</span> d_palette.inactive();
00093         <span class="keywordflow">default</span>:
00094             <span class="keywordflow">return</span> d_palette.active();
00095     }
00096 }
00097 
<a name="l00101"></a><a class="code" href="class_qwt_dial_simple_needle.html#a0">00101</a> <a class="code" href="class_qwt_dial_simple_needle.html#a0">QwtDialSimpleNeedle::QwtDialSimpleNeedle</a>(Style style, <span class="keywordtype">bool</span> hasKnob, 
00102         <span class="keyword">const</span> QColor &amp;mid, <span class="keyword">const</span> QColor &amp;base):
00103     d_style(style),
00104     d_hasKnob(hasKnob),
00105     d_width(-1)
00106 {
00107     QPalette palette;
00108     <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i &lt; QPalette::NColorGroups; i++ )
00109     {
00110         palette.setColor((QPalette::ColorGroup)i,
00111             QColorGroup::Mid, mid);
00112         palette.setColor((QPalette::ColorGroup)i,
00113             QColorGroup::Base, base);
00114     }
00115 
00116     <a class="code" href="class_qwt_dial_needle.html#a3">setPalette</a>(palette);
00117 }
00118 
<a name="l00120"></a><a class="code" href="class_qwt_dial_simple_needle.html#a2">00120</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial_simple_needle.html#a2">QwtDialSimpleNeedle::setWidth</a>(<span class="keywordtype">int</span> width)
00121 {
00122     d_width = width;
00123 }
00124 
<a name="l00128"></a><a class="code" href="class_qwt_dial_simple_needle.html#a3">00128</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_dial_simple_needle.html#a3">QwtDialSimpleNeedle::width</a>()<span class="keyword"> const</span>
00129 <span class="keyword"></span>{
00130     <span class="keywordflow">return</span> d_width;
00131 }
00132 
<a name="l00142"></a><a class="code" href="class_qwt_dial_simple_needle.html#a1">00142</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial_simple_needle.html#a1">QwtDialSimpleNeedle::draw</a>(QPainter *painter, <span class="keyword">const</span> QPoint &amp;center,
00143     <span class="keywordtype">int</span> length, <span class="keywordtype">double</span> direction, QPalette::ColorGroup cg)<span class="keyword"> const</span>
00144 <span class="keyword"></span>{
00145     <span class="keywordflow">if</span> ( d_style == Arrow )
00146     {
00147         <a class="code" href="class_qwt_dial_simple_needle.html#e0">drawArrowNeedle</a>(painter, <a class="code" href="class_qwt_dial_needle.html#b0">colorGroup</a>(cg),
00148             center, length, d_width, direction, d_hasKnob);
00149     }
00150     <span class="keywordflow">else</span>
00151     {
00152         <a class="code" href="class_qwt_dial_simple_needle.html#e1">drawRayNeedle</a>(painter, <a class="code" href="class_qwt_dial_needle.html#b0">colorGroup</a>(cg), center, length, d_width,
00153             direction, d_hasKnob); 
00154     }
00155 }
00156 
<a name="l00160"></a><a class="code" href="class_qwt_dial_simple_needle.html#e1">00160</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial_simple_needle.html#e1">QwtDialSimpleNeedle::drawRayNeedle</a>(
00161     QPainter *painter, <span class="keyword">const</span> QColorGroup &amp;cg,
00162     <span class="keyword">const</span> QPoint &amp;center, <span class="keywordtype">int</span> length, <span class="keywordtype">int</span> width, <span class="keywordtype">double</span> direction, 
00163     <span class="keywordtype">bool</span> hasKnob)
00164 {
00165     <span class="keywordflow">if</span> ( width &lt;= 0 )
00166         width = 5;
00167 
00168     direction *= M_PI / 180.0;
00169 
00170     painter-&gt;save();
00171 
00172     <span class="keyword">const</span> QPoint p1(center.x() + 1, center.y() + 2);
00173     <span class="keyword">const</span> QPoint p2 = qwtPolar2Pos(p1, length, direction);
00174 
00175     <span class="keywordflow">if</span> ( width == 1 )
00176     {
00177         painter-&gt;setPen(QPen(cg.mid(), 1));
00178         painter-&gt;drawLine(p1, p2);
00179     }
00180     <span class="keywordflow">else</span>
00181     {
00182         QPointArray pa(4);
00183         pa.setPoint(0, qwtPolar2Pos(p1, width / 2, direction + M_PI_2));
00184         pa.setPoint(1, qwtPolar2Pos(p2, width / 2, direction + M_PI_2));
00185         pa.setPoint(2, qwtPolar2Pos(p2, width / 2, direction - M_PI_2));
00186         pa.setPoint(3, qwtPolar2Pos(p1, width / 2, direction - M_PI_2));
00187 
00188         painter-&gt;setPen(Qt::NoPen);
00189         painter-&gt;setBrush(cg.brush(QColorGroup::Mid));
00190         painter-&gt;drawPolygon(pa);
00191     }
00192     <span class="keywordflow">if</span> ( hasKnob )
00193     {
00194         <span class="keywordtype">int</span> knobWidth = QMAX(qRound(width * 0.7), 5);
00195         <span class="keywordflow">if</span> ( knobWidth % 2 == 0 )
00196             knobWidth++;
00197 
00198         <a class="code" href="class_qwt_dial_needle.html#f0">drawKnob</a>(painter, center, knobWidth, 
00199             cg.brush(QColorGroup::Base), FALSE);
00200     }
00201 
00202     painter-&gt;restore();
00203 }
00204 
<a name="l00208"></a><a class="code" href="class_qwt_dial_simple_needle.html#e0">00208</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial_simple_needle.html#e0">QwtDialSimpleNeedle::drawArrowNeedle</a>(
00209     QPainter *painter, <span class="keyword">const</span> QColorGroup &amp;cg,
00210     <span class="keyword">const</span> QPoint &amp;center, <span class="keywordtype">int</span> length, <span class="keywordtype">int</span> width,
00211     <span class="keywordtype">double</span> direction, <span class="keywordtype">bool</span> hasKnob)
00212 {
00213     direction *= M_PI / 180.0;
00214 
00215     painter-&gt;save();
00216 
00217     <span class="keywordflow">if</span> ( width &lt;= 0 )
00218     {
00219         width = (<span class="keywordtype">int</span>)QMAX(length * 0.06, 9);
00220         <span class="keywordflow">if</span> ( width % 2 == 0 )
00221             width++;
00222     }
00223 
00224     <span class="keyword">const</span> <span class="keywordtype">int</span> peak = 3;
00225     <span class="keyword">const</span> QPoint p1(center.x() + 1, center.y() + 1);
00226     <span class="keyword">const</span> QPoint p2 = qwtPolar2Pos(p1, length - peak, direction);
00227     <span class="keyword">const</span> QPoint p3 = qwtPolar2Pos(p1, length, direction);
00228 
00229     QPointArray pa(5);
00230     pa.setPoint(0, qwtPolar2Pos(p1, width / 2, direction - M_PI_2));
00231     pa.setPoint(1, qwtPolar2Pos(p2, 1, direction - M_PI_2));
00232     pa.setPoint(2, p3);
00233     pa.setPoint(3, qwtPolar2Pos(p2, 1, direction + M_PI_2));
00234     pa.setPoint(4, qwtPolar2Pos(p1, width / 2, direction + M_PI_2));
00235 
00236     painter-&gt;setPen(Qt::NoPen);
00237     painter-&gt;setBrush(cg.brush(QColorGroup::Mid));
00238     painter-&gt;drawPolygon(pa);
00239 
00240     QPointArray shadowPa(3);
00241 
00242     <span class="keyword">const</span> <span class="keywordtype">int</span> colorOffset = 10;
00243 
00244     <span class="keywordtype">int</span> i;
00245     <span class="keywordflow">for</span> ( i = 0; i &lt; 3; i++ )
00246         shadowPa.setPoint(i, pa[i]);
00247 
00248     painter-&gt;setPen(cg.mid().dark(100 + colorOffset));
00249     painter-&gt;drawPolyline(shadowPa);
00250 
00251     <span class="keywordflow">for</span> ( i = 0; i &lt; 3; i++ )
00252         shadowPa.setPoint(i, pa[i + 2]);
00253 
00254     painter-&gt;setPen(cg.mid().dark(100 - colorOffset));
00255     painter-&gt;drawPolyline(shadowPa);
00256 
00257     <span class="keywordflow">if</span> ( hasKnob )
00258     {
00259         <a class="code" href="class_qwt_dial_needle.html#f0">drawKnob</a>(painter, center, qRound(width * 1.3), 
00260             cg.brush(QColorGroup::Base), FALSE);
00261     }
00262 
00263     painter-&gt;restore();
00264 }
00265 
00267 
<a name="l00268"></a><a class="code" href="class_qwt_compass_magnet_needle.html#a0">00268</a> <a class="code" href="class_qwt_compass_magnet_needle.html#a0">QwtCompassMagnetNeedle::QwtCompassMagnetNeedle</a>(Style style,
00269         <span class="keyword">const</span> QColor &amp;light, <span class="keyword">const</span> QColor &amp;dark):
00270     d_style(style)
00271 {   
00272     QPalette palette;
00273     <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i &lt; QPalette::NColorGroups; i++ )
00274     {
00275         palette.setColor((QPalette::ColorGroup)i,
00276             QColorGroup::Light, light);
00277         palette.setColor((QPalette::ColorGroup)i,
00278             QColorGroup::Dark, dark);
00279         palette.setColor((QPalette::ColorGroup)i,
00280             QColorGroup::Base, Qt::darkGray);
00281     }
00282 
00283     <a class="code" href="class_qwt_dial_needle.html#a3">setPalette</a>(palette); 
00284 }
00285 
<a name="l00295"></a><a class="code" href="class_qwt_compass_magnet_needle.html#a1">00295</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_compass_magnet_needle.html#a1">QwtCompassMagnetNeedle::draw</a>(QPainter *painter, <span class="keyword">const</span> QPoint &amp;center,
00296     <span class="keywordtype">int</span> length, <span class="keywordtype">double</span> direction, QPalette::ColorGroup cg)<span class="keyword"> const</span>
00297 <span class="keyword"></span>{
00298     <span class="keywordflow">if</span> ( d_style == ThinStyle )
00299     {
00300         <a class="code" href="class_qwt_compass_magnet_needle.html#e1">drawThinNeedle</a>(painter, <a class="code" href="class_qwt_dial_needle.html#b0">colorGroup</a>(cg), 
00301             center, length, direction); 
00302     }
00303     <span class="keywordflow">else</span>
00304     {
00305         <a class="code" href="class_qwt_compass_magnet_needle.html#e0">drawTriangleNeedle</a>(painter, <a class="code" href="class_qwt_dial_needle.html#b0">colorGroup</a>(cg),
00306             center, length, direction);
00307     }
00308 }
00309 
<a name="l00313"></a><a class="code" href="class_qwt_compass_magnet_needle.html#e0">00313</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_compass_magnet_needle.html#e0">QwtCompassMagnetNeedle::drawTriangleNeedle</a>(
00314     QPainter *painter, <span class="keyword">const</span> QColorGroup &amp;cg,
00315     <span class="keyword">const</span> QPoint &amp;center, <span class="keywordtype">int</span> length, <span class="keywordtype">double</span> direction) 
00316 {
00317     QBrush brush;
00318 
00319     <span class="keyword">const</span> <span class="keywordtype">int</span> width = qRound(length / 3.0);
00320     <span class="keyword">const</span> <span class="keywordtype">int</span> colorOffset =  10;
00321 
00322     painter-&gt;save();
00323     painter-&gt;setPen(Qt::NoPen);
00324 
00325     <span class="keyword">const</span> QPoint arrowCenter(center.x() + 1, center.y() + 1);
00326 
00327     QPointArray pa(3);
00328     pa.setPoint(0, arrowCenter);
00329     pa.setPoint(1, qwtDegree2Pos(arrowCenter, length, direction));
00330 
00331     pa.setPoint(2, qwtDegree2Pos(arrowCenter, width / 2, direction + 90.0));
00332 
00333     brush = cg.brush(QColorGroup::Dark);
00334     brush.setColor(brush.color().dark(100 + colorOffset));
00335     painter-&gt;setBrush(brush);
00336     painter-&gt;drawPolygon(pa);
00337 
00338     pa.setPoint(2, qwtDegree2Pos(arrowCenter, width / 2, direction - 90.0));
00339 
00340     brush = cg.brush(QColorGroup::Dark);
00341     brush.setColor(brush.color().dark(100 - colorOffset));
00342     painter-&gt;setBrush(brush);
00343     painter-&gt;drawPolygon(pa);
00344 
00345     <span class="comment">// --</span>
00346 
00347     pa.setPoint(1, qwtDegree2Pos(arrowCenter, length, direction + 180.0));
00348 
00349     pa.setPoint(2, qwtDegree2Pos(arrowCenter, width / 2, direction + 90.0));
00350 
00351     brush = cg.brush(QColorGroup::Light);
00352     brush.setColor(brush.color().dark(100 + colorOffset));
00353     painter-&gt;setBrush(brush);
00354     painter-&gt;drawPolygon(pa);
00355 
00356     pa.setPoint(2, qwtDegree2Pos(arrowCenter, width / 2, direction - 90.0));
00357 
00358     brush = cg.brush(QColorGroup::Light);
00359     brush.setColor(brush.color().dark(100 - colorOffset));
00360     painter-&gt;setBrush(brush);
00361     painter-&gt;drawPolygon(pa);
00362 
00363     painter-&gt;restore();
00364 }
00365 
<a name="l00369"></a><a class="code" href="class_qwt_compass_magnet_needle.html#e1">00369</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_compass_magnet_needle.html#e1">QwtCompassMagnetNeedle::drawThinNeedle</a>(
00370     QPainter *painter, <span class="keyword">const</span> QColorGroup &amp;cg,
00371     <span class="keyword">const</span> QPoint &amp;center, <span class="keywordtype">int</span> length, <span class="keywordtype">double</span> direction) 
00372 {
00373     <span class="keyword">const</span> <span class="keywordtype">int</span> colorOffset = 10;
00374     <span class="keyword">const</span> <span class="keywordtype">int</span> width = QMAX(qRound(length / 6.0), 3);
00375 
00376     painter-&gt;save();
00377 
00378     <span class="keyword">const</span> QPoint arrowCenter(center.x() + 1, center.y() + 1);
00379 
00380     <a class="code" href="class_qwt_compass_magnet_needle.html#f0">drawPointer</a>(painter, cg.brush(QColorGroup::Dark), colorOffset, 
00381         arrowCenter, length, width, direction);
00382     <a class="code" href="class_qwt_compass_magnet_needle.html#f0">drawPointer</a>(painter, cg.brush(QColorGroup::Light), -colorOffset, 
00383         arrowCenter, length, width, direction + 180.0);
00384     
00385     <a class="code" href="class_qwt_dial_needle.html#f0">drawKnob</a>(painter, arrowCenter, width, 
00386         cg.brush(QColorGroup::Base), TRUE);
00387 
00388     painter-&gt;restore();
00389 }
00390 
<a name="l00394"></a><a class="code" href="class_qwt_compass_magnet_needle.html#f0">00394</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_compass_magnet_needle.html#f0">QwtCompassMagnetNeedle::drawPointer</a>(
00395     QPainter *painter, <span class="keyword">const</span> QBrush &amp;brush,
00396     <span class="keywordtype">int</span> colorOffset, <span class="keyword">const</span> QPoint &amp;center, <span class="keywordtype">int</span> length, 
00397     <span class="keywordtype">int</span> width, <span class="keywordtype">double</span> direction)
00398 {
00399     painter-&gt;save();
00400 
00401     <span class="keyword">const</span> <span class="keywordtype">int</span> peak = QMAX(qRound(length / 10.0), 5);
00402 
00403     <span class="keyword">const</span> <span class="keywordtype">int</span> knobWidth = width + 8;
00404     QRect knobRect(0, 0, knobWidth, knobWidth);
00405     knobRect.moveCenter(center);
00406 
00407     QPointArray pa(5);
00408 
00409     pa.setPoint(0, qwtDegree2Pos(center, width / 2, direction + 90.0));
00410     pa.setPoint(1, center);
00411     pa.setPoint(2, qwtDegree2Pos(pa.point(1), length - peak, direction));
00412     pa.setPoint(3, qwtDegree2Pos(center, length, direction));
00413     pa.setPoint(4, qwtDegree2Pos(pa.point(0), length - peak, direction));
00414 
00415     painter-&gt;setPen(Qt::NoPen);
00416 
00417     QBrush darkBrush = brush;
00418     darkBrush.setColor(darkBrush.color().dark(100 + colorOffset));
00419     painter-&gt;setBrush(darkBrush);
00420     painter-&gt;drawPolygon(pa);
00421     painter-&gt;drawPie(knobRect, qRound(direction * 16), 90 * 16);
00422 
00423     pa.setPoint(0, qwtDegree2Pos(center, width / 2, direction - 90.0));
00424     pa.setPoint(4, qwtDegree2Pos(pa.point(0), length - peak, direction));
00425 
00426     QBrush lightBrush = brush;
00427     lightBrush.setColor(lightBrush.color().dark(100 - colorOffset));
00428     painter-&gt;setBrush(lightBrush);
00429     painter-&gt;drawPolygon(pa);
00430     painter-&gt;drawPie(knobRect, qRound(direction * 16), -90 * 16);
00431 
00432     painter-&gt;restore();
00433 }
00434 
00436 
<a name="l00437"></a><a class="code" href="class_qwt_compass_wind_arrow.html#a0">00437</a> <a class="code" href="class_qwt_compass_wind_arrow.html#a0">QwtCompassWindArrow::QwtCompassWindArrow</a>(Style style, 
00438         <span class="keyword">const</span> QColor &amp;light, <span class="keyword">const</span> QColor &amp;dark):
00439     d_style(style)
00440 {
00441     QPalette palette;
00442     <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i &lt; QPalette::NColorGroups; i++ )
00443     {
00444         palette.setColor((QPalette::ColorGroup)i,
00445             QColorGroup::Light, light);
00446         palette.setColor((QPalette::ColorGroup)i,
00447             QColorGroup::Dark, dark);
00448     }
00449 
00450     <a class="code" href="class_qwt_dial_needle.html#a3">setPalette</a>(palette);
00451 }
00452 
<a name="l00462"></a><a class="code" href="class_qwt_compass_wind_arrow.html#a1">00462</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_compass_wind_arrow.html#a1">QwtCompassWindArrow::draw</a>(QPainter *painter, <span class="keyword">const</span> QPoint &amp;center,
00463     <span class="keywordtype">int</span> length, <span class="keywordtype">double</span> direction, QPalette::ColorGroup cg)<span class="keyword"> const</span>
00464 <span class="keyword"></span>{
00465     <span class="keywordflow">if</span> ( d_style == Style1 )
00466     {
00467         <a class="code" href="class_qwt_compass_wind_arrow.html#e0">drawStyle1Needle</a>(painter, <a class="code" href="class_qwt_dial_needle.html#b0">colorGroup</a>(cg),
00468             center, length, direction);
00469     }
00470     <span class="keywordflow">else</span>
00471     {
00472         <a class="code" href="class_qwt_compass_wind_arrow.html#e1">drawStyle2Needle</a>(painter, <a class="code" href="class_qwt_dial_needle.html#b0">colorGroup</a>(cg),
00473             center, length, direction); 
00474     }
00475 }
00476 
<a name="l00480"></a><a class="code" href="class_qwt_compass_wind_arrow.html#e0">00480</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_compass_wind_arrow.html#e0">QwtCompassWindArrow::drawStyle1Needle</a>(
00481     QPainter *painter, <span class="keyword">const</span> QColorGroup &amp;cg,
00482     <span class="keyword">const</span> QPoint &amp;center, <span class="keywordtype">int</span> length, <span class="keywordtype">double</span> direction) 
00483 {
00484     <span class="keyword">const</span> <span class="keywordtype">double</span> AR1[] = {0, 0.4, 0.3, 1, 0.8, 1, 0.3, 0.4};
00485     <span class="keyword">const</span> <span class="keywordtype">double</span> AW1[] = {0, -45, -20, -15, 0, 15, 20, 45};
00486 
00487     <span class="keyword">const</span> QPoint arrowCenter(center.x() + 1, center.y() + 1);
00488 
00489     QPointArray pa(8);
00490     pa.setPoint(0, arrowCenter);
00491     <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=1; i&lt;8; i++) 
00492     {
00493         <span class="keyword">const</span> QPoint p = qwtDegree2Pos(center, 
00494             AR1[i] * length, direction + AW1[i]);
00495         pa.setPoint(i, p);
00496     }
00497 
00498     painter-&gt;save();
00499     painter-&gt;setPen(Qt::NoPen);
00500     painter-&gt;setBrush(cg.brush(QColorGroup::Light));
00501     painter-&gt;drawPolygon(pa);
00502     painter-&gt;restore();
00503 }
00504 
<a name="l00508"></a><a class="code" href="class_qwt_compass_wind_arrow.html#e1">00508</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_compass_wind_arrow.html#e1">QwtCompassWindArrow::drawStyle2Needle</a>(
00509     QPainter *painter, <span class="keyword">const</span> QColorGroup &amp;cg,
00510     <span class="keyword">const</span> QPoint &amp;center, <span class="keywordtype">int</span> length, <span class="keywordtype">double</span> direction) 
00511 {
00512     painter-&gt;save();
00513     painter-&gt;setPen(Qt::NoPen);
00514 
00515     <span class="keyword">const</span> <span class="keywordtype">double</span> angle = 12.0;
00516     <span class="keyword">const</span> <span class="keywordtype">double</span> ratio = 0.7;
00517 
00518     <span class="keyword">const</span> QPoint arrowCenter(center.x() + 1, center.y() + 1);
00519 
00520     QPointArray pa(3);
00521 
00522     pa.setPoint(0, center);
00523     pa.setPoint(2, qwtDegree2Pos(arrowCenter, ratio * length, direction));
00524 
00525     pa.setPoint(1, qwtDegree2Pos(arrowCenter, length, direction + angle));
00526     painter-&gt;setBrush(cg.brush(QColorGroup::Dark));
00527     painter-&gt;drawPolygon(pa);
00528 
00529     pa.setPoint(1, qwtDegree2Pos(arrowCenter, length, direction - angle));
00530     painter-&gt;setBrush(cg.brush(QColorGroup::Light));
00531     painter-&gt;drawPolygon(pa);
00532 
00533     painter-&gt;restore();
00534 }
00535 
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