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<h1>qwt_painter.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="comment">// vim: expandtab</span>
00011 
00012 <span class="preprocessor">#include &lt;qwindowdefs.h&gt;</span>
00013 <span class="preprocessor">#include &lt;qrect.h&gt;</span>
00014 <span class="preprocessor">#include &lt;qpainter.h&gt;</span>
00015 <span class="preprocessor">#include &lt;qpalette.h&gt;</span>
00016 <span class="preprocessor">#include &lt;qpaintdevice.h&gt;</span>
00017 <span class="preprocessor">#include &lt;qpaintdevicemetrics.h&gt;</span>
00018 <span class="preprocessor">#include &lt;qpixmap.h&gt;</span>
00019 <span class="preprocessor">#include &lt;qsimplerichtext.h&gt;</span>
00020 
00021 <span class="preprocessor">#include "qwt_painter.h"</span>
00022 <span class="preprocessor">#include "qwt_rect.h"</span>
00023 <span class="preprocessor">#include "<a class="code" href="qwt__math_8h.html">qwt_math.h</a>"</span>
00024 
00025 <span class="preprocessor">#if defined(Q_WS_X11)</span>
00026 <span class="preprocessor"></span><span class="keywordtype">bool</span> QwtPainter::d_deviceClipping = TRUE;
00027 <span class="preprocessor">#else</span>
00028 <span class="preprocessor"></span><span class="keywordtype">bool</span> QwtPainter::d_deviceClipping = FALSE;
00029 <span class="preprocessor">#endif</span>
00030 <span class="preprocessor"></span>
00031 QwtMetricsMap QwtPainter::d_metricsMap;
00032 
00033 <span class="preprocessor">#if defined(QWT_BROKEN_RASTEROP_FONT)</span>
00034 <span class="preprocessor"></span><span class="preprocessor">#if QT_VERSION &lt; 300</span>
00035 <span class="preprocessor"></span><span class="comment">// QwtPainter::textFontSubstitutionMode does not exist for Qt-2.3.</span>
00036 
00037 <span class="comment">// Calling qt_use_xft() from Qt-2.3 internals gives a segmentation error,</span>
00038 <span class="comment">// because qt_use_xft() requires presumably an open X display.</span>
00039 <span class="comment">// Steal qt_use_xft() but check only the environment variable QT_XFT.</span>
00040 <span class="preprocessor">#include &lt;stdlib.h&gt;</span>
00041 <span class="keyword">static</span> <span class="keywordtype">int</span> qwt_use_xft (<span class="keywordtype">void</span>)
00042 {
00043     <span class="keyword">static</span> <span class="keywordtype">int</span>  checked_env=0;
00044     <span class="keyword">static</span> <span class="keywordtype">int</span>  use_xft=0;
00045 
00046     <span class="keywordflow">if</span> (!checked_env) {
00047         <span class="keywordtype">char</span> *e = getenv (<span class="stringliteral">"QT_XFT"</span>);
00048         <span class="keywordflow">if</span> ( e &amp;&amp; (*e == <span class="charliteral">'1'</span> ||
00049                    *e == <span class="charliteral">'y'</span> || *e == <span class="charliteral">'Y'</span> ||
00050                    *e == <span class="charliteral">'t'</span> || *e == <span class="charliteral">'T'</span> ))
00051             use_xft = 1;
00052         <span class="keywordflow">else</span>
00053             use_xft = 0;
00054     }
00055     checked_env = 1;
00056 
00057     <span class="keywordflow">return</span> use_xft;
00058 }
00059 <span class="keywordtype">int</span> QwtPainter::d_textXorRopMode = qwt_use_xft() ? 
00060     QwtPainter::XorRopTextKeepFont : QwtPainter::XorRopTextNormal;
00061 <span class="preprocessor">#else // QT_VERSION &gt;= 300</span>
00062 <span class="preprocessor"></span><span class="preprocessor">#if 1</span>
00063 <span class="preprocessor"></span><span class="keywordtype">int</span> QwtPainter::d_textXorRopMode = QwtPainter::XorRopTextKeepFont;
00064 <span class="preprocessor">#else</span>
00065 <span class="preprocessor"></span><span class="keywordtype">int</span> QwtPainter::d_textXorRopMode = QwtPainter::XorRopTextKeepColor;
00066 <span class="preprocessor">#endif</span>
00067 <span class="preprocessor"></span><span class="preprocessor">#endif // QT_VERSION</span>
00068 <span class="preprocessor"></span><span class="preprocessor">#else</span>
00069 <span class="preprocessor"></span><span class="keywordtype">int</span> QwtPainter::d_textXorRopMode = QwtPainter::XorRopTextNormal;
00070 <span class="preprocessor">#endif</span>
00071 <span class="preprocessor"></span>
<a name="l00077"></a><a class="code" href="class_qwt_painter.html#e4">00077</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e4">QwtPainter::setDeviceClipping</a>(<span class="keywordtype">bool</span> enable)
00078 {
00079     d_deviceClipping = enable;
00080 }
00081 
<a name="l00088"></a><a class="code" href="class_qwt_painter.html#e5">00088</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_painter.html#e5">QwtPainter::deviceClipping</a>()
00089 {
00090     <span class="keywordflow">return</span> d_deviceClipping;
00091 }
00092 
00097 <span class="keyword">const</span> QRect &amp;QwtPainter::deviceClipRect()
00098 {
00099     <span class="keyword">static</span> QRect clip;
00100 
00101     <span class="keywordflow">if</span> ( !clip.isValid() )
00102     {
00103         clip.setCoords(QWT_COORD_MIN, QWT_COORD_MIN,
00104             QWT_COORD_MAX, QWT_COORD_MAX);
00105     }
00106     <span class="keywordflow">return</span> clip;
00107 }
00108 
<a name="l00117"></a><a class="code" href="class_qwt_painter.html#e0">00117</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e0">QwtPainter::setMetricsMap</a>(<span class="keyword">const</span> QPaintDevice *layout,
00118     <span class="keyword">const</span> QPaintDevice *device)
00119 {
00120     d_metricsMap.setMetrics(layout, device);
00121 }
00122 
<a name="l00127"></a><a class="code" href="class_qwt_painter.html#e1">00127</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e0">QwtPainter::setMetricsMap</a>(<span class="keyword">const</span> QwtMetricsMap &amp;map)
00128 {
00129     d_metricsMap = map;
00130 }
00131 
<a name="l00136"></a><a class="code" href="class_qwt_painter.html#e2">00136</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e2">QwtPainter::resetMetricsMap</a>()
00137 {
00138     d_metricsMap = QwtMetricsMap();
00139 }
00140 
<a name="l00144"></a><a class="code" href="class_qwt_painter.html#e3">00144</a> <span class="keyword">const</span> QwtMetricsMap &amp;<a class="code" href="class_qwt_painter.html#e3">QwtPainter::metricsMap</a>()
00145 {
00146     <span class="keywordflow">return</span> d_metricsMap;
00147 }
00148 
<a name="l00152"></a><a class="code" href="class_qwt_painter.html#e6">00152</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e6">QwtPainter::setClipRect</a>(QPainter *painter, <span class="keyword">const</span> QRect &amp;rect)
00153 {
00154     painter-&gt;setClipRect(d_metricsMap.layoutToDevice(rect, painter));
00155 }
00156 
<a name="l00160"></a><a class="code" href="class_qwt_painter.html#e12">00160</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e12">QwtPainter::drawRect</a>(QPainter *painter, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y, <span class="keywordtype">int</span> w, <span class="keywordtype">int</span> h) 
00161 {
00162     <a class="code" href="class_qwt_painter.html#e12">drawRect</a>(painter, QRect(x, y, w, h));
00163 }
00164 
<a name="l00168"></a><a class="code" href="class_qwt_painter.html#e13">00168</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e12">QwtPainter::drawRect</a>(QPainter *painter, <span class="keyword">const</span> QRect &amp;rect) 
00169 {
00170     <span class="keyword">const</span> QRect r = d_metricsMap.layoutToDevice(rect, painter);
00171 
00172     <span class="keywordflow">if</span> ( d_deviceClipping &amp;&amp; !deviceClipRect().contains(r) )
00173         <span class="keywordflow">return</span>;
00174 
00175     painter-&gt;drawRect(r);
00176 }
00177 
<a name="l00181"></a><a class="code" href="class_qwt_painter.html#e14">00181</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e14">QwtPainter::fillRect</a>(QPainter *painter, 
00182     <span class="keyword">const</span> QRect &amp;rect, <span class="keyword">const</span> QBrush &amp;brush)
00183 {
00184     <span class="keyword">const</span> QRect r = d_metricsMap.layoutToDevice(rect, painter);
00185 
00186     <span class="keywordflow">if</span> ( d_deviceClipping &amp;&amp; !deviceClipRect().contains(r) )
00187         <span class="keywordflow">return</span>;
00188 
00189     painter-&gt;fillRect(r, brush);
00190 }
00191 
<a name="l00195"></a><a class="code" href="class_qwt_painter.html#e15">00195</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e15">QwtPainter::drawEllipse</a>(QPainter *painter, <span class="keyword">const</span> QRect &amp;rect)
00196 {
00197     <span class="keyword">const</span> QRect r = d_metricsMap.layoutToDevice(rect, painter);
00198 
00199     <span class="keywordflow">if</span> ( d_deviceClipping &amp;&amp; !deviceClipRect().contains(rect) )
00200         <span class="keywordflow">return</span>;
00201 
00202     painter-&gt;drawEllipse(r);
00203 }
00204 
<a name="l00208"></a><a class="code" href="class_qwt_painter.html#e7">00208</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e7">QwtPainter::drawText</a>(QPainter *painter, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y, 
00209         <span class="keyword">const</span> QString &amp;text, <span class="keywordtype">int</span> len)
00210 {
00211     <a class="code" href="class_qwt_painter.html#e7">drawText</a>(painter, QPoint(x, y), text, len);
00212 }
00213 
<a name="l00217"></a><a class="code" href="class_qwt_painter.html#e8">00217</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e7">QwtPainter::drawText</a>(QPainter *painter, <span class="keyword">const</span> QPoint &amp;pos, 
00218         <span class="keyword">const</span> QString &amp;text, <span class="keywordtype">int</span> len)
00219 {
00220     <span class="keyword">const</span> QPoint p = d_metricsMap.layoutToDevice(pos, painter);
00221 
00222     <span class="keywordflow">if</span> ( d_deviceClipping &amp;&amp; !deviceClipRect().contains(p) )
00223         <span class="keywordflow">return</span>;
00224 
00225 <span class="preprocessor">#if defined(QWT_BROKEN_RASTEROP_FONT)</span>
00226 <span class="preprocessor"></span>    <span class="comment">// XorROP text drawing does not work with xft</span>
00227 <span class="preprocessor">#if QT_VERSION &gt;= 300</span>
00228 <span class="preprocessor"></span>    <span class="keywordflow">if</span> (Qt::XorROP == painter-&gt;rasterOp()
00229         &amp;&amp; d_textXorRopMode == XorRopTextKeepColor)
00230     {
00231         <span class="comment">// step 1: disable xft</span>
00232         <span class="keyword">extern</span> <span class="keywordtype">bool</span> qt_has_xft;
00233         <span class="keyword">const</span> <span class="keywordtype">bool</span> XftEnabled = qt_has_xft;
00234         qt_has_xft = FALSE;
00235 
00236         <span class="comment">// step 2: substitute the font by a bitmap font</span>
00237         painter-&gt;save();
00238         QFont font = painter-&gt;font();
00239         font.setStyleStrategy(QFont::PreferBitmap);
00240         painter-&gt;setFont(font);
00241 
00242         painter-&gt;drawText(p, text, len);
00243 
00244         <span class="comment">// restore state</span>
00245         qt_has_xft = XftEnabled;
00246         painter-&gt;restore();
00247 
00248     }
00249     <span class="keywordflow">else</span>
00250 <span class="preprocessor">#endif</span>
00251 <span class="preprocessor"></span>    <span class="keywordflow">if</span> (Qt::XorROP == painter-&gt;rasterOp()
00252         &amp;&amp; d_textXorRopMode == XorRopTextKeepFont)
00253     {
00254         <span class="comment">// step 1: create a buffer pixmap, but we have to guess its size.</span>
00255 <span class="preprocessor">#if QT_VERSION &lt; 300</span>
00256 <span class="preprocessor"></span>        <span class="keywordtype">int</span> flags = Qt::AlignLeft;
00257 <span class="preprocessor">#else</span>
00258 <span class="preprocessor"></span>        <span class="keywordtype">int</span> flags = Qt::AlignAuto; <span class="comment">// OK for QwtScaleDraw, but ???</span>
00259 <span class="preprocessor">#endif </span>
00260 <span class="preprocessor"></span>        QFontMetrics fm = painter-&gt;fontMetrics();
00261         QPixmap pixmap(fm.boundingRect(
00262             0, 0, QCOORD_MAX, QCOORD_MAX, flags, text, len).size());
00263         pixmap.fill(QColor(0, 0, 0));
00264 
00265         <span class="comment">// step 2: draw the text on the pixmap</span>
00266         QPainter pmPainter(&amp;pixmap);
00267         pmPainter.setPen(painter-&gt;pen());
00268         pmPainter.setFont(painter-&gt;font());
00269         pmPainter.drawText(pixmap.rect(), flags, text, len);
00270 
00271         <span class="comment">// step 3: draw the pixmap</span>
00272         painter-&gt;drawPixmap(p.x(), p.y() - fm.ascent(), pixmap);
00273     }
00274     <span class="keywordflow">else</span>
00275 <span class="preprocessor">#endif</span>
00276 <span class="preprocessor"></span>    {
00277         painter-&gt;drawText(p, text, len);
00278     }
00279 }
00280 
<a name="l00284"></a><a class="code" href="class_qwt_painter.html#e9">00284</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e7">QwtPainter::drawText</a>(QPainter *painter, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y, <span class="keywordtype">int</span> w, <span class="keywordtype">int</span> h, 
00285         <span class="keywordtype">int</span> flags, <span class="keyword">const</span> QString &amp;text, <span class="keywordtype">int</span> len)
00286 {
00287     <a class="code" href="class_qwt_painter.html#e7">drawText</a>(painter, QRect(x, y, w, h), flags, text, len);
00288 }
00289 
<a name="l00293"></a><a class="code" href="class_qwt_painter.html#e10">00293</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e7">QwtPainter::drawText</a>(QPainter *painter, <span class="keyword">const</span> QRect &amp;rect, 
00294         <span class="keywordtype">int</span> flags, <span class="keyword">const</span> QString &amp;text, <span class="keywordtype">int</span> len)
00295 {
00296 <span class="preprocessor">#if defined(QWT_BROKEN_RASTEROP_FONT)</span>
00297 <span class="preprocessor"></span>    <span class="comment">// XorROP text drawing does not work with xft</span>
00298 <span class="preprocessor">#if QT_VERSION &gt;= 300</span>
00299 <span class="preprocessor"></span>    <span class="keywordflow">if</span> (Qt::XorROP == painter-&gt;rasterOp()
00300         &amp;&amp; d_textXorRopMode == XorRopTextKeepColor)
00301     {
00302         <span class="comment">// step 1: disable xft</span>
00303         <span class="keyword">extern</span> <span class="keywordtype">bool</span> qt_has_xft;
00304         <span class="keyword">const</span> <span class="keywordtype">bool</span> XftEnabled = qt_has_xft;
00305         qt_has_xft = FALSE;
00306 
00307         <span class="comment">// step 2: substitute the font by a bitmap font</span>
00308         painter-&gt;save();
00309         QFont font = painter-&gt;font();
00310         font.setStyleStrategy(QFont::PreferBitmap);
00311         painter-&gt;setFont(font);
00312 
00313         painter-&gt;drawText(
00314             d_metricsMap.layoutToDevice(rect, painter), flags, text, len);
00315 
00316         <span class="comment">// restore state</span>
00317         painter-&gt;restore();
00318         qt_has_xft = XftEnabled;
00319 
00320     }
00321     <span class="keywordflow">else</span>
00322 <span class="preprocessor">#endif</span>
00323 <span class="preprocessor"></span>    <span class="keywordflow">if</span> (Qt::XorROP == painter-&gt;rasterOp()
00324         &amp;&amp; d_textXorRopMode == XorRopTextKeepFont)
00325     {
00326         <span class="comment">// step 1: create a buffer pixmap</span>
00327         QRect target = d_metricsMap.layoutToDevice(rect, painter);
00328         QPixmap pixmap(target.size());
00329         pixmap.fill(QColor(0, 0, 0));
00330 
00331         <span class="comment">// step 2: draw the text on the pixmap</span>
00332         QPainter pmPainter(&amp;pixmap);
00333         pmPainter.setPen(painter-&gt;pen());
00334         pmPainter.setFont(painter-&gt;font());
00335         pmPainter.drawText(pixmap.rect(), flags, text, len);
00336 
00337         <span class="comment">// step 3: draw the pixmap</span>
00338 <span class="preprocessor">#if QT_VERSION &lt; 300</span>
00339 <span class="preprocessor"></span>        painter-&gt;drawPixmap(target.x(), target.y(), pixmap);
00340 <span class="preprocessor">#else</span>
00341 <span class="preprocessor"></span>        painter-&gt;drawPixmap(target, pixmap);
00342 <span class="preprocessor">#endif</span>
00343 <span class="preprocessor"></span>    }
00344     <span class="keywordflow">else</span>
00345 <span class="preprocessor">#endif</span>
00346 <span class="preprocessor"></span>    {
00347         painter-&gt;drawText(
00348             d_metricsMap.layoutToDevice(rect, painter), flags, text, len);
00349     }
00350 }
00351 
00352 <span class="preprocessor">#ifndef QT_NO_RICHTEXT</span>
00353 <span class="preprocessor"></span>
<a name="l00357"></a><a class="code" href="class_qwt_painter.html#e11">00357</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e11">QwtPainter::drawSimpleRichText</a>(QPainter *painter, <span class="keyword">const</span> QRect &amp;rect,
00358     <span class="keywordtype">int</span> flags, QSimpleRichText &amp;text)
00359 {
00360     QColorGroup cg;
00361     cg.setColor(QColorGroup::Text, painter-&gt;pen().color());
00362 
00363 <span class="preprocessor">#if QT_VERSION &lt; 300</span>
00364 <span class="preprocessor"></span>    <span class="keyword">const</span> QFont defaultFont = QFont::defaultFont();
00365     QFont::setDefaultFont(painter-&gt;font());
00366 <span class="preprocessor">#endif</span>
00367 <span class="preprocessor"></span>
00368     <span class="keyword">const</span> QRect scaledRect = d_metricsMap.layoutToDevice(rect, painter);
00369 
00370     text.setWidth(painter, scaledRect.width());
00371 
00372     <span class="comment">// QSimpleRichText is Qt::AlignTop by default</span>
00373 
00374     <span class="keywordtype">int</span> y = scaledRect.y();
00375     <span class="keywordflow">if</span> (flags &amp; Qt::AlignBottom)
00376         y += (scaledRect.height() - text.height());
00377     <span class="keywordflow">else</span> <span class="keywordflow">if</span> (flags &amp; Qt::AlignVCenter)
00378         y += (scaledRect.height() - text.height())/2;
00379 
00380 <span class="preprocessor">#if defined(QWT_BROKEN_RASTEROP_FONT)</span>
00381 <span class="preprocessor"></span>    <span class="comment">// XorROP text drawing does not work with xft</span>
00382 <span class="preprocessor">#if QT_VERSION &gt;= 300</span>
00383 <span class="preprocessor"></span>    <span class="keywordflow">if</span> (Qt::XorROP == painter-&gt;rasterOp()
00384         &amp;&amp; d_textXorRopMode == XorRopTextKeepColor)
00385     {
00386         <span class="comment">// step 1: disable xft</span>
00387         <span class="keyword">extern</span> <span class="keywordtype">bool</span> qt_has_xft;
00388         <span class="keyword">const</span> <span class="keywordtype">bool</span> XftEnabled = qt_has_xft;
00389         qt_has_xft = FALSE;
00390 
00391         <span class="comment">// step 2: substitute the font by a bitmap font</span>
00392         painter-&gt;save();
00393         QFont font = painter-&gt;font();
00394         font.setStyleStrategy(QFont::PreferBitmap);
00395         painter-&gt;setFont(font);
00396 
00397         text.draw(painter, scaledRect.x(), y, scaledRect, cg);
00398 
00399         <span class="comment">// restore state</span>
00400         painter-&gt;restore();
00401         qt_has_xft = XftEnabled;
00402 
00403     }
00404     <span class="keywordflow">else</span>
00405 <span class="preprocessor">#endif</span>
00406 <span class="preprocessor"></span>    <span class="keywordflow">if</span> (Qt::XorROP == painter-&gt;rasterOp()
00407         &amp;&amp; d_textXorRopMode == XorRopTextKeepFont)
00408     {
00409         <span class="comment">// step 1: create a buffer pixmap</span>
00410         QPixmap pixmap(scaledRect.size());
00411         pixmap.fill(QColor(0, 0, 0));
00412 
00413         <span class="comment">// step 2: draw the text on the pixmap</span>
00414         QPainter pmPainter(&amp;pixmap);
00415         pmPainter.setPen(painter-&gt;pen());
00416         pmPainter.setFont(painter-&gt;font());
00417         text.draw(&amp;pmPainter, scaledRect.x(), y, scaledRect, cg);
00418 
00419         <span class="comment">// step 3: draw the pixmap</span>
00420 <span class="preprocessor">#if QT_VERSION &lt; 300</span>
00421 <span class="preprocessor"></span>        painter-&gt;drawPixmap(scaledRect.x(), scaledRect.y(), pixmap);
00422 <span class="preprocessor">#else</span>
00423 <span class="preprocessor"></span>        painter-&gt;drawPixmap(scaledRect, pixmap);
00424 <span class="preprocessor">#endif</span>
00425 <span class="preprocessor"></span>    }
00426     <span class="keywordflow">else</span>
00427 <span class="preprocessor">#endif</span>
00428 <span class="preprocessor"></span>    {
00429         text.draw(painter, scaledRect.x(), y, scaledRect, cg);
00430     }
00431 
00432 <span class="preprocessor">#if QT_VERSION &lt; 300</span>
00433 <span class="preprocessor"></span>    QFont::setDefaultFont(defaultFont);
00434 <span class="preprocessor">#endif</span>
00435 <span class="preprocessor"></span>}
00436 
00437 <span class="preprocessor">#endif // !QT_NO_RICHTEXT</span>
00438 <span class="preprocessor"></span>
00439 
<a name="l00443"></a><a class="code" href="class_qwt_painter.html#e17">00443</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(QPainter *painter, 
00444     <span class="keyword">const</span> QPoint &amp;p1, <span class="keyword">const</span> QPoint &amp;p2) 
00445 {
00446     QPointArray pa(2);
00447 
00448     <span class="keywordflow">if</span> ( d_deviceClipping &amp;&amp; 
00449         !(deviceClipRect().contains(p1) &amp;&amp; deviceClipRect().contains(p2)) )
00450     {
00451         pa.setPoint(0, p1);
00452         pa.setPoint(1, p2);
00453         <a class="code" href="class_qwt_painter.html#e19">drawPolyline</a>(painter, pa);
00454     }
00455     <span class="keywordflow">else</span>
00456     {
00457         pa.setPoint(0, d_metricsMap.layoutToDevice(p1));
00458         pa.setPoint(1, d_metricsMap.layoutToDevice(p2));
00459 
00460 <span class="preprocessor">#if QT_VERSION &gt;= 0x030200</span>
00461 <span class="preprocessor"></span>        <span class="keywordflow">if</span> ( painter-&gt;device()-&gt;isExtDev() )
00462         {
00463             <span class="comment">// Strange: the postscript driver of QPrinter adds an offset </span>
00464             <span class="comment">// of 0.5 to the start/endpoint when using drawLine, but not</span>
00465             <span class="comment">// for lines painted with drawLineSegments.</span>
00466 
00467             painter-&gt;drawLineSegments(pa);
00468         }
00469         <span class="keywordflow">else</span>
00470             painter-&gt;drawLine(pa[0], pa[1]);
00471 <span class="preprocessor">#else</span>
00472 <span class="preprocessor"></span>        painter-&gt;drawLine(pa[0], pa[1]);
00473 <span class="preprocessor">#endif</span>
00474 <span class="preprocessor"></span>    }
00475 }
00476 
<a name="l00481"></a><a class="code" href="class_qwt_painter.html#e16">00481</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(QPainter *painter, <span class="keywordtype">int</span> x1, <span class="keywordtype">int</span> y1, <span class="keywordtype">int</span> x2, <span class="keywordtype">int</span> y2)
00482 {
00483     <a class="code" href="class_qwt_painter.html#e16">drawLine</a>(painter, QPoint(x1, y1), QPoint(x2, y2));
00484 }
00485 
<a name="l00490"></a><a class="code" href="class_qwt_painter.html#e18">00490</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e18">QwtPainter::drawPolygon</a>(QPainter *painter, <span class="keyword">const</span> QPointArray &amp;pa)
00491 {
00492     QPointArray cpa = d_metricsMap.layoutToDevice(pa);
00493     <span class="keywordflow">if</span> ( d_deviceClipping )
00494         cpa = <a class="code" href="class_qwt_painter.html#e22">clip</a>(cpa);
00495     painter-&gt;drawPolygon(cpa);
00496 }
00497 
<a name="l00501"></a><a class="code" href="class_qwt_painter.html#e19">00501</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e19">QwtPainter::drawPolyline</a>(QPainter *painter, <span class="keyword">const</span> QPointArray &amp;pa)
00502 {
00503     QPointArray cpa = d_metricsMap.layoutToDevice(pa);
00504     <span class="keywordflow">if</span> ( d_deviceClipping )
00505         cpa = <a class="code" href="class_qwt_painter.html#e22">clip</a>(cpa);
00506     painter-&gt;drawPolyline(cpa);
00507 }
00508 
<a name="l00513"></a><a class="code" href="class_qwt_painter.html#e20">00513</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e20">QwtPainter::drawPoint</a>(QPainter *painter, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y)
00514 {
00515     <span class="keyword">const</span> QPoint pos = d_metricsMap.layoutToDevice(QPoint(x, y));
00516 
00517     <span class="keywordflow">if</span> ( d_deviceClipping &amp;&amp; !deviceClipRect().contains(pos) )
00518         <span class="keywordflow">return</span>;
00519 
00520     painter-&gt;drawPoint(pos);
00521 }
00522 
<a name="l00524"></a><a class="code" href="class_qwt_painter.html#e22">00524</a> QPointArray <a class="code" href="class_qwt_painter.html#e22">QwtPainter::clip</a>(<span class="keyword">const</span> QPointArray &amp;pa)
00525 {
00526     <span class="keyword">const</span> <a class="code" href="class_qwt_rect.html">QwtRect</a> rect(deviceClipRect());
00527     <span class="keywordflow">return</span> rect.<a class="code" href="class_qwt_rect.html#a7">clip</a>(pa);
00528 }
00529 
00530 <span class="keywordtype">void</span> QwtPainter::drawColoredArc(QPainter *painter, <span class="keyword">const</span> QRect &amp;rect, 
00531     <span class="keywordtype">int</span> peak, <span class="keywordtype">int</span> arc, <span class="keywordtype">int</span> intervall, <span class="keyword">const</span> QColor &amp;c1, <span class="keyword">const</span> QColor &amp;c2)
00532 {
00533     <span class="keywordtype">int</span> h1, s1, v1;
00534     <span class="keywordtype">int</span> h2, s2, v2;
00535 
00536     c1.hsv(&amp;h1, &amp;s1, &amp;v1);
00537     c2.hsv(&amp;h2, &amp;s2, &amp;v2);
00538     
00539     arc /= 2;
00540     <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> angle = -arc; angle &lt; arc; angle += intervall)
00541     {
00542         <span class="keywordtype">double</span> ratio;
00543         <span class="keywordflow">if</span> ( angle &gt;= 0 )
00544             ratio = 1.0 - angle / double(arc);
00545         <span class="keywordflow">else</span>
00546             ratio = 1.0 + angle / double(arc);
00547             
00548 
00549         <span class="keyword">const</span> QColor c(h1 + qRound(ratio * (h2 - h1)),
00550             s1 + qRound(ratio * (s2 - s1)),
00551             v1 + qRound(ratio * (v2 - v1)),
00552             QColor::Hsv);
00553 
00554         painter-&gt;setPen(QPen(c, painter-&gt;pen().width()));
00555         painter-&gt;drawArc(rect, (peak + angle) * 16, intervall * 16);
00556     }
00557 }
00558 
<a name="l00560"></a><a class="code" href="class_qwt_painter.html#e21">00560</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_painter.html#e21">QwtPainter::drawRoundFrame</a>(QPainter *painter, <span class="keyword">const</span> QRect &amp;rect,
00561     <span class="keywordtype">int</span> width, <span class="keyword">const</span> QColorGroup &amp;cg, <span class="keywordtype">bool</span> sunken)
00562 {
00563     QColor c0 = cg.mid();
00564     QColor c1, c2;
00565     <span class="keywordflow">if</span> ( sunken )
00566     {
00567         c1 = cg.dark();
00568         c2 = cg.light();
00569     }
00570     <span class="keywordflow">else</span>
00571     {
00572         c1 = cg.light();
00573         c2 = cg.dark();
00574     }
00575 
00576     painter-&gt;setPen(QPen(c0, width));
00577     painter-&gt;drawArc(rect, 0, 360 * 16); <span class="comment">// full</span>
00578 
00579     <span class="keyword">const</span> <span class="keywordtype">int</span> peak = 150;
00580     <span class="keyword">const</span> <span class="keywordtype">int</span> intervall = 2;
00581 
00582     <span class="keywordflow">if</span> ( c0 != c1 )
00583         drawColoredArc(painter, rect, peak, 160, intervall, c0, c1);
00584     <span class="keywordflow">if</span> ( c0 != c2 )
00585         drawColoredArc(painter, rect, peak + 180, 120, intervall, c0, c2);
00586 }
00587 
<a name="l00594"></a><a class="code" href="class_qwt_painter.html#e23">00594</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_painter.html#e23">QwtPainter::textXorRopMode</a>()
00595 {
00596     <span class="keywordflow">return</span> d_textXorRopMode;
00597 }
00598 
00618 <span class="preprocessor">#if defined(QWT_BROKEN_RASTEROP_FONT)</span>
00619 <span class="preprocessor"></span>
00620 <span class="keywordtype">int</span> <a class="code" href="class_qwt_painter.html#e24">QwtPainter::setTextXorRopMode</a>(TextXorRopMode mode)
00621 {
00622     <span class="keywordflow">if</span> ((mode == XorRopTextNormal)
00623         || (mode == XorRopTextKeepFont)
00624 <span class="preprocessor">#if QT_VERSION &gt;= 300</span>
00625 <span class="preprocessor"></span>        || (mode == XorRopTextKeepColor)
00626 <span class="preprocessor">#endif</span>
00627 <span class="preprocessor"></span>        )
00628         d_textXorRopMode = mode;
00629 
00630 <span class="preprocessor">#if QT_VERSION &lt; 300</span>
00631 <span class="preprocessor"></span>    <span class="keywordflow">if</span> (!qwt_use_xft())
00632         d_textXorRopMode = XorRopTextNormal;
00633 <span class="preprocessor">#endif</span>
00634 <span class="preprocessor"></span>
00635     <span class="keywordflow">return</span> d_textXorRopMode;
00636 }
00637 
00638 <span class="preprocessor">#else</span>
00639 <span class="preprocessor"></span>
<a name="l00640"></a><a class="code" href="class_qwt_painter.html#e24">00640</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_painter.html#e24">QwtPainter::setTextXorRopMode</a>(TextXorRopMode)
00641 {
00642     <span class="keywordflow">return</span> d_textXorRopMode;
00643 }
00644 
00645 <span class="preprocessor">#endif</span>
00646 <span class="preprocessor"></span>
00647 <span class="comment">// Local Variables:</span>
00648 <span class="comment">// mode: C++</span>
00649 <span class="comment">// c-file-style: "stroustrup"</span>
00650 <span class="comment">// indent-tabs-mode: nil</span>
00651 <span class="comment">// End:</span>
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