File: qwt__dial_8cpp-source.html

package info (click to toggle)
libqwt 4.2.0-4.1
links: PTS
area: main
in suites: lenny
size: 9,832 kB
ctags: 5,512
sloc: cpp: 22,973; ansic: 244; makefile: 66
file content (805 lines) | stat: -rw-r--r-- 49,185 bytes
parent folder | download | duplicates (5)
<!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&apos;s Guide: qwt_dial.cpp Source File</title>
<link href="doxygen.css" rel="stylesheet" type="text/css">
</head><body>
<!-- Generated by Doxygen 1.3.8 -->
<div class="qindex"><a class="qindex" href="index.html">Main&nbsp;Page</a> | <a class="qindex" href="hierarchy.html">Class&nbsp;Hierarchy</a> | <a class="qindex" href="classes.html">Alphabetical&nbsp;List</a> | <a class="qindex" href="annotated.html">Class&nbsp;List</a> | <a class="qindex" href="files.html">File&nbsp;List</a> | <a class="qindex" href="functions.html">Class&nbsp;Members</a> | <a class="qindex" href="globals.html">File&nbsp;Members</a> | <a class="qindex" href="pages.html">Related&nbsp;Pages</a></div>
<h1>qwt_dial.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;qpainter.h&gt;</span>
00012 <span class="preprocessor">#include &lt;qpixmap.h&gt;</span>
00013 <span class="preprocessor">#include &lt;qevent.h&gt;</span>
00014 <span class="preprocessor">#include "<a class="code" href="qwt__math_8h.html">qwt_math.h</a>"</span>
00015 <span class="preprocessor">#include "qwt_paint_buffer.h"</span>
00016 <span class="preprocessor">#include "qwt_painter.h"</span>
00017 <span class="preprocessor">#include "qwt_dial_needle.h"</span>
00018 <span class="preprocessor">#include "qwt_dial.h"</span>
00019 
00020 <span class="keywordtype">double</span> QwtDial::d_previousDir = -1.0;
00021 
<a name="l00027"></a><a class="code" href="class_qwt_dial_scale_draw.html#a0">00027</a> <a class="code" href="class_qwt_dial_scale_draw.html#a0">QwtDialScaleDraw::QwtDialScaleDraw</a>(<a class="code" href="class_qwt_dial.html">QwtDial</a> *parent):
00028     d_parent(parent),
00029     d_penWidth(1),
00030     d_visibleLabels(TRUE)
00031 {
00032 }
00033 
<a name="l00043"></a><a class="code" href="class_qwt_dial_scale_draw.html#a2">00043</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial_scale_draw.html#a2">QwtDialScaleDraw::showLabels</a>(<span class="keywordtype">bool</span> enable)
00044 {
00045     d_visibleLabels = enable;
00046 }
00047 
<a name="l00052"></a><a class="code" href="class_qwt_dial_scale_draw.html#a3">00052</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_dial_scale_draw.html#a3">QwtDialScaleDraw::visibleLabels</a>()<span class="keyword"> const</span>
00053 <span class="keyword"></span>{
00054     <span class="keywordflow">return</span> d_visibleLabels;
00055 }
00056 
<a name="l00064"></a><a class="code" href="class_qwt_dial_scale_draw.html#a4">00064</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial_scale_draw.html#a4">QwtDialScaleDraw::setPenWidth</a>(uint penWidth)
00065 {
00066     d_penWidth = penWidth;
00067 }
00068 
<a name="l00073"></a><a class="code" href="class_qwt_dial_scale_draw.html#a5">00073</a> uint <a class="code" href="class_qwt_dial_scale_draw.html#a5">QwtDialScaleDraw::penWidth</a>()<span class="keyword"> const</span>
00074 <span class="keyword"></span>{
00075     <span class="keywordflow">return</span> d_penWidth;
00076 }
00077 
<a name="l00085"></a><a class="code" href="class_qwt_dial_scale_draw.html#a1">00085</a> QString <a class="code" href="class_qwt_dial_scale_draw.html#a1">QwtDialScaleDraw::label</a>(<span class="keywordtype">double</span> value)<span class="keyword"> const</span>
00086 <span class="keyword"></span>{
00087     <span class="keywordflow">if</span> ( !d_visibleLabels )
00088         <span class="keywordflow">return</span> QString::null;
00089 
00090     <span class="keywordflow">if</span> ( d_parent == NULL )
00091         <span class="keywordflow">return</span> <a class="code" href="class_qwt_scale_draw.html#a30">QwtScaleDraw::label</a>(value);
00092 
00093     <span class="keywordflow">return</span> d_parent-&gt;<a class="code" href="class_qwt_dial.html#b9">scaleLabel</a>(value);
00094 }
00095 
<a name="l00107"></a><a class="code" href="class_qwt_dial.html#a0">00107</a> <a class="code" href="class_qwt_dial.html#a0">QwtDial::QwtDial</a>(QWidget* parent, <span class="keyword">const</span> <span class="keywordtype">char</span>* name):
00108         <a class="code" href="class_qwt_slider_base.html">QwtSliderBase</a>(Qt::Horizontal, parent, name, 
00109             Qt::WRepaintNoErase|Qt::WResizeNoErase),
00110     d_visibleBackground(FALSE),
00111     d_frameShadow(Sunken),
00112     d_lineWidth(0),
00113     d_mode(RotateNeedle),
00114     d_origin(90.0),
00115     d_minScaleArc(0.0),
00116     d_maxScaleArc(0.0),
00117     d_scaleDraw(0),
00118     d_maxMajIntv(36),
00119     d_maxMinIntv(10),
00120     d_scaleStep(0.0),
00121     d_needle(0)
00122 {
00123     setBackgroundMode(NoBackground);
00124     setFocusPolicy(QWidget::TabFocus);
00125 
00126     QPalette p = palette();
00127     <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i &lt; QPalette::NColorGroups; i++ )
00128     {
00129         <span class="keyword">const</span> QPalette::ColorGroup cg = (QPalette::ColorGroup)i;
00130 
00131         <span class="comment">// Base: background color of the circle inside the frame.</span>
00132         <span class="comment">// Foreground: background color of the circle inside the scale</span>
00133 
00134         p.setColor(cg, QColorGroup::Foreground, 
00135             p.color(cg, QColorGroup::Base));
00136     }
00137     setPalette(p);
00138 
00139     d_scaleDraw = <span class="keyword">new</span> <a class="code" href="class_qwt_dial_scale_draw.html">QwtDialScaleDraw</a>(<span class="keyword">this</span>);
00140     d_scaleDraw-&gt;<a class="code" href="class_qwt_scale_draw.html#a6">setGeometry</a>(0, 0, 0, QwtScaleDraw::Round);
00141 
00142     <a class="code" href="class_qwt_dial.html#a13">setScaleArc</a>(0.0, 360.0); <span class="comment">// scale as a full circle</span>
00143     <a class="code" href="class_qwt_dbl_range.html#a2">setRange</a>(0.0, 360.0, 1.0, 10); <span class="comment">// degrees as deafult</span>
00144 }
00145 
<a name="l00147"></a><a class="code" href="class_qwt_dial.html#a1">00147</a> <a class="code" href="class_qwt_dial.html#a1">QwtDial::~QwtDial</a>() 
00148 {
00149     <span class="keyword">delete</span> d_scaleDraw;
00150     <span class="keyword">delete</span> d_needle;
00151 }
00152 
<a name="l00161"></a><a class="code" href="class_qwt_dial.html#a5">00161</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#a5">QwtDial::showBackground</a>(<span class="keywordtype">bool</span> show)
00162 {
00163     <span class="keywordflow">if</span> ( d_visibleBackground != show )
00164     {
00165         d_visibleBackground = show;
00166 
00167         <span class="keywordflow">if</span> ( d_visibleBackground )
00168             clearMask();
00169         <span class="keywordflow">else</span>
00170             setMask(QRegion(<a class="code" href="class_qwt_dial.html#a23">boundingRect</a>(), QRegion::Ellipse));
00171 
00172         update();
00173     }
00174 }
00175 
<a name="l00181"></a><a class="code" href="class_qwt_dial.html#a4">00181</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_dial.html#a4">QwtDial::hasVisibleBackground</a>()<span class="keyword"> const </span>
00182 <span class="keyword"></span>{ 
00183     <span class="keywordflow">return</span> d_visibleBackground; 
00184 }
00185 
<a name="l00191"></a><a class="code" href="class_qwt_dial.html#a2">00191</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#a2">QwtDial::setFrameShadow</a>(Shadow shadow)
00192 {
00193     <span class="keywordflow">if</span> ( shadow != d_frameShadow )
00194     {
00195         d_frameShadow = shadow;
00196         <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_dial.html#a7">lineWidth</a>() &gt; 0 )
00197             update();
00198     }
00199 }
00200 
<a name="l00206"></a><a class="code" href="class_qwt_dial.html#a3">00206</a> <a class="code" href="class_qwt_dial.html#w8">QwtDial::Shadow</a> <a class="code" href="class_qwt_dial.html#a3">QwtDial::frameShadow</a>()<span class="keyword"> const </span>
00207 <span class="keyword"></span>{ 
00208     <span class="keywordflow">return</span> d_frameShadow; 
00209 }
00210 
<a name="l00217"></a><a class="code" href="class_qwt_dial.html#a6">00217</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#a6">QwtDial::setLineWidth</a>(<span class="keywordtype">int</span> lineWidth)
00218 {
00219     <span class="keywordflow">if</span> ( lineWidth &lt; 0 )
00220         lineWidth = 0;
00221 
00222     <span class="keywordflow">if</span> ( d_lineWidth != lineWidth )
00223     {
00224         d_lineWidth = lineWidth;
00225         update();
00226     }
00227 }
00228 
<a name="l00234"></a><a class="code" href="class_qwt_dial.html#a7">00234</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_dial.html#a7">QwtDial::lineWidth</a>()<span class="keyword"> const </span>
00235 <span class="keyword"></span>{ 
00236     <span class="keywordflow">return</span> d_lineWidth; 
00237 }
00238 
<a name="l00243"></a><a class="code" href="class_qwt_dial.html#a24">00243</a> QRect <a class="code" href="class_qwt_dial.html#a24">QwtDial::contentsRect</a>()<span class="keyword"> const</span>
00244 <span class="keyword"></span>{
00245     <span class="keyword">const</span> <span class="keywordtype">int</span> lw = <a class="code" href="class_qwt_dial.html#a7">lineWidth</a>();
00246 
00247     QRect r = <a class="code" href="class_qwt_dial.html#a23">boundingRect</a>();
00248     <span class="keywordflow">if</span> ( lw &gt; 0 )
00249     {
00250         r.setRect(r.x() + lw, r.y() + lw, 
00251             r.width() - 2 * lw, r.height() - 2 * lw);
00252     }
00253     <span class="keywordflow">return</span> r;
00254 }
00255 
<a name="l00260"></a><a class="code" href="class_qwt_dial.html#a23">00260</a> QRect <a class="code" href="class_qwt_dial.html#a23">QwtDial::boundingRect</a>()<span class="keyword"> const</span>
00261 <span class="keyword"></span>{
00262     <span class="keyword">const</span> <span class="keywordtype">int</span> radius = QMIN(width(), height()) / 2;
00263 
00264     QRect r(0, 0, 2 * radius, 2 * radius);
00265     r.moveCenter(rect().center());
00266     <span class="keywordflow">return</span> r;
00267 }
00268 
<a name="l00273"></a><a class="code" href="class_qwt_dial.html#a25">00273</a> QRect <a class="code" href="class_qwt_dial.html#a25">QwtDial::scaleContentsRect</a>()<span class="keyword"> const</span>
00274 <span class="keyword"></span>{
00275     <span class="keyword">const</span> QPen scalePen(colorGroup().text(), 0, Qt::NoPen);
00276 
00277     <span class="keywordtype">int</span> scaleDist = 0;
00278     <span class="keywordflow">if</span> ( d_scaleDraw )
00279     {
00280         scaleDist = QMAX(
00281             d_scaleDraw-&gt;<a class="code" href="class_qwt_scale_draw.html#a18">maxWidth</a>(scalePen, fontMetrics()),
00282             d_scaleDraw-&gt;<a class="code" href="class_qwt_scale_draw.html#a19">maxHeight</a>(scalePen, fontMetrics()));
00283         scaleDist++; <span class="comment">// margin</span>
00284     }
00285 
00286     <span class="keyword">const</span> QRect rect = <a class="code" href="class_qwt_dial.html#a24">contentsRect</a>();
00287     <span class="keywordflow">return</span> QRect(rect.x() + scaleDist, rect.y() + scaleDist,
00288         rect.width() - 2 * scaleDist, rect.height() - 2 * scaleDist);
00289 }
00290 
<a name="l00306"></a><a class="code" href="class_qwt_dial.html#a8">00306</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#a8">QwtDial::setMode</a>(Mode mode)
00307 {   
00308     <span class="keywordflow">if</span> ( mode != d_mode )
00309     {
00310         d_mode = mode;
00311         update(); 
00312     }
00313 }       
00314 
<a name="l00329"></a><a class="code" href="class_qwt_dial.html#a9">00329</a> <a class="code" href="class_qwt_dial.html#w10">QwtDial::Mode</a> <a class="code" href="class_qwt_dial.html#a9">QwtDial::mode</a>()<span class="keyword"> const</span>
00330 <span class="keyword"></span>{
00331     <span class="keywordflow">return</span> d_mode;
00332 }
00333 
<a name="l00344"></a><a class="code" href="class_qwt_dial.html#a10">00344</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#a10">QwtDial::setWrapping</a>(<span class="keywordtype">bool</span> wrapping)
00345 {
00346     <a class="code" href="class_qwt_dbl_range.html#a7">setPeriodic</a>(wrapping);
00347 } 
00348 
<a name="l00357"></a><a class="code" href="class_qwt_dial.html#a11">00357</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_dial.html#a11">QwtDial::wrapping</a>()<span class="keyword"> const</span>
00358 <span class="keyword"></span>{
00359     <span class="keywordflow">return</span> <a class="code" href="class_qwt_dbl_range.html#a8">periodic</a>();
00360 }
00361 
<a name="l00363"></a><a class="code" href="class_qwt_dial.html#b1">00363</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#b1">QwtDial::resizeEvent</a>(QResizeEvent *e)
00364 {
00365     QWidget::resizeEvent(e);
00366 
00367     <span class="keywordflow">if</span> ( !<a class="code" href="class_qwt_dial.html#a4">hasVisibleBackground</a>() )
00368         setMask(QRegion(<a class="code" href="class_qwt_dial.html#a23">boundingRect</a>(), QRegion::Ellipse));
00369 }
00370 
<a name="l00372"></a><a class="code" href="class_qwt_dial.html#b0">00372</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#b0">QwtDial::paintEvent</a>(QPaintEvent *e)
00373 {
00374     <span class="keyword">const</span> QRect &amp;ur = e-&gt;rect();
00375     <span class="keywordflow">if</span> ( ur.isValid() )
00376     {
00377         <a class="code" href="class_qwt_paint_buffer.html">QwtPaintBuffer</a> paintBuffer(<span class="keyword">this</span>, ur);
00378 
00379         QPainter *painter = paintBuffer.<a class="code" href="class_qwt_paint_buffer.html#a5">painter</a>();
00380 
00381         <a class="code" href="class_qwt_dial.html#b4">drawContents</a>(painter);
00382         <a class="code" href="class_qwt_dial.html#b3">drawFrame</a>(painter);
00383 
00384         <span class="keywordflow">if</span> ( hasFocus() )
00385             <a class="code" href="class_qwt_dial.html#b5">drawFocusIndicator</a>(painter);
00386     }
00387 }
00388 
<a name="l00394"></a><a class="code" href="class_qwt_dial.html#b5">00394</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#b5">QwtDial::drawFocusIndicator</a>(QPainter *painter)<span class="keyword"> const</span>
00395 <span class="keyword"></span>{
00396     <span class="keywordflow">if</span> ( !<a class="code" href="class_qwt_slider_base.html#a9">isReadOnly</a>() )
00397     {
00398         QRect focusRect = <a class="code" href="class_qwt_dial.html#a24">contentsRect</a>();
00399 
00400         <span class="keyword">const</span> <span class="keywordtype">int</span> margin = 2;
00401         focusRect.setRect( 
00402             focusRect.x() + margin,
00403             focusRect.y() + margin,
00404             focusRect.width() - 2 * margin,
00405             focusRect.height() - 2 * margin);
00406 
00407         QColor color = colorGroup().color(QColorGroup::Base);
00408         <span class="keywordflow">if</span> (color.isValid())
00409         {
00410             <span class="keywordtype">int</span> h, s, v;
00411             color.hsv(&amp;h, &amp;s, &amp;v);
00412             color = (v &gt; 128) ? Qt::gray.dark(120) : Qt::gray.light(120);
00413         }
00414         <span class="keywordflow">else</span>
00415             color = Qt::darkGray;
00416 
00417         painter-&gt;save();
00418         painter-&gt;setBrush(Qt::NoBrush);
00419         painter-&gt;setPen(QPen(color, 0, Qt::DotLine));
00420         painter-&gt;drawEllipse(focusRect);
00421         painter-&gt;restore();
00422     }
00423 }
00424 
<a name="l00431"></a><a class="code" href="class_qwt_dial.html#b3">00431</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#b3">QwtDial::drawFrame</a>(QPainter *painter)
00432 {
00433     <span class="keyword">const</span> <span class="keywordtype">int</span> lw = <a class="code" href="class_qwt_dial.html#a7">lineWidth</a>();
00434     <span class="keyword">const</span> <span class="keywordtype">int</span> off = (lw + 1) % 2;
00435 
00436     QRect r = <a class="code" href="class_qwt_dial.html#a23">boundingRect</a>();
00437     r.setRect(r.x() + lw / 2 - off, r.y() + lw / 2 - off,
00438         r.width() - lw + off + 1, r.height() - lw + off + 1);
00439 
00440     <span class="keywordflow">if</span> ( lw &gt; 0 )
00441     {
00442         <span class="keywordflow">switch</span>(d_frameShadow)
00443         {
00444             <span class="keywordflow">case</span> QwtDial::Raised:
00445                 <a class="code" href="class_qwt_painter.html#e21">QwtPainter::drawRoundFrame</a>(painter, r, 
00446                     lw, colorGroup(), FALSE);
00447                 <span class="keywordflow">break</span>;
00448             <span class="keywordflow">case</span> QwtDial::Sunken:
00449                 <a class="code" href="class_qwt_painter.html#e21">QwtPainter::drawRoundFrame</a>(painter, r, 
00450                     lw, colorGroup(), TRUE);
00451                 <span class="keywordflow">break</span>;
00452             <span class="keywordflow">default</span>: <span class="comment">// Plain</span>
00453             {
00454                 painter-&gt;save();
00455                 painter-&gt;setPen(QPen(Qt::black, lw));
00456                 painter-&gt;setBrush(Qt::NoBrush);
00457                 painter-&gt;drawEllipse(r);
00458                 painter-&gt;restore();
00459             }
00460         }
00461     }
00462 }
00463 
<a name="l00475"></a><a class="code" href="class_qwt_dial.html#b4">00475</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#b4">QwtDial::drawContents</a>(QPainter *painter)<span class="keyword"> const</span>
00476 <span class="keyword"></span>{
00477     <span class="keywordflow">if</span> ( backgroundMode() == NoBackground || 
00478         colorGroup().brush(QColorGroup::Base) != 
00479             colorGroup().brush(QColorGroup::Background) )
00480     {
00481         <span class="comment">// Dont use QPainter::drawEllipse. There are some pixels</span>
00482         <span class="comment">// different compared to the region in the mask, leaving</span>
00483         <span class="comment">// them in background color.</span>
00484 
00485         painter-&gt;save();
00486         painter-&gt;setPen(Qt::NoPen);
00487         painter-&gt;setBrush(colorGroup().brush(QColorGroup::Base));
00488 
00489         <span class="comment">// Even if we want to fill the contentsRect only, we fill the</span>
00490         <span class="comment">// complete boundingRect. The frame will be painted later</span>
00491         <span class="comment">// above, but we want to have the base color below it</span>
00492         <span class="comment">// because round objects doesnt cover all pixels.</span>
00493 
00494         QRect br = <a class="code" href="class_qwt_dial.html#a23">boundingRect</a>();
00495 <span class="preprocessor">#if QT_VERSION &lt; 300</span>
00496 <span class="preprocessor"></span><span class="preprocessor">#ifdef _WS_WIN32_</span>
00497 <span class="preprocessor"></span>        <span class="comment">// Qt-230-NC draws ellipses not as nicely as Qt-2.3.x on X Windows</span>
00498         br.setTop(br.top()-1);
00499         br.setLeft(br.left()-1);
00500         br.setBottom(br.bottom()+1);
00501         br.setRight(br.right()+1);
00502 <span class="preprocessor">#endif</span>
00503 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
00504 <span class="preprocessor"></span>        painter-&gt;setClipRegion(QRegion(painter-&gt;xForm(br), QRegion::Ellipse));
00505         painter-&gt;drawRect(br);
00506         painter-&gt;restore();
00507     }
00508 
00509 
00510     <span class="keyword">const</span> QRect insideScaleRect = <a class="code" href="class_qwt_dial.html#a25">scaleContentsRect</a>();
00511     <span class="keywordflow">if</span> ( colorGroup().brush(QColorGroup::Foreground) !=
00512         colorGroup().brush(QColorGroup::Base) )
00513     {
00514         painter-&gt;save();
00515         painter-&gt;setPen(Qt::NoPen);
00516         painter-&gt;setBrush(colorGroup().brush(QColorGroup::Foreground));
00517 
00518         painter-&gt;setClipRegion(
00519             QRegion(painter-&gt;xForm(insideScaleRect), QRegion::Ellipse));
00520         painter-&gt;drawRect(insideScaleRect);
00521         painter-&gt;restore();
00522     }
00523 
00524     <span class="keyword">const</span> QPoint center = insideScaleRect.center();
00525     <span class="keyword">const</span> <span class="keywordtype">int</span> radius = insideScaleRect.width() / 2;
00526 
00527     painter-&gt;save();
00528     <a class="code" href="class_qwt_dial.html#b7">drawScaleContents</a>(painter, center, radius);
00529     painter-&gt;restore();
00530 
00531     <span class="keywordtype">double</span> direction = d_origin;
00532 
00533     <span class="keywordflow">if</span> (<a class="code" href="class_qwt_slider_base.html#a10">isValid</a>())
00534     {
00535         direction = d_origin + d_minScaleArc;
00536         <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>() &gt; <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>() &amp;&amp; d_maxScaleArc &gt; d_minScaleArc )
00537         {
00538             <span class="keyword">const</span> <span class="keywordtype">double</span> ratio = 
00539                 (<a class="code" href="class_qwt_dbl_range.html#a6">value</a>() - <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>()) / (<a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>() - <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>());
00540             direction += ratio * (d_maxScaleArc - d_minScaleArc);
00541         }
00542 
00543         <span class="keywordflow">if</span> ( direction &gt;= 360.0 )
00544             direction -= 360.0;
00545     }
00546 
00547     <span class="keywordtype">double</span> <a class="code" href="class_qwt_dial.html#a19">origin</a> = d_origin;
00548     <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_dial.html#a9">mode</a>() == RotateScale )
00549     {
00550         origin -= direction - d_origin;
00551         direction = d_origin;
00552     }
00553 
00554     painter-&gt;save();
00555     <a class="code" href="class_qwt_dial.html#b6">drawScale</a>(painter, center, radius, origin, d_minScaleArc, d_maxScaleArc);
00556     painter-&gt;restore();
00557 
00558     <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a10">isValid</a>() )
00559     {
00560         QPalette::ColorGroup cg;
00561         <span class="keywordflow">if</span> ( isEnabled() )
00562             cg = hasFocus() ? QPalette::Active : QPalette::Inactive;
00563         <span class="keywordflow">else</span>
00564             cg = QPalette::Disabled;
00565 
00566         painter-&gt;save();
00567         <a class="code" href="class_qwt_dial.html#b8">drawNeedle</a>(painter, center, radius, direction, cg);
00568         painter-&gt;restore();
00569     }
00570 }
00571 
<a name="l00584"></a><a class="code" href="class_qwt_dial.html#b8">00584</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#b8">QwtDial::drawNeedle</a>(QPainter *painter, <span class="keyword">const</span> QPoint &amp;center, 
00585     <span class="keywordtype">int</span> radius, <span class="keywordtype">double</span> direction, QPalette::ColorGroup cg)<span class="keyword"> const</span>
00586 <span class="keyword"></span>{
00587     <span class="keywordflow">if</span> ( d_needle )
00588     {
00589         direction = 360.0 - direction; <span class="comment">// counter clockwise</span>
00590         d_needle-&gt;<a class="code" href="class_qwt_dial_needle.html#a2">draw</a>(painter, center, radius, direction, cg);
00591     }
00592 }
00593 
<a name="l00606"></a><a class="code" href="class_qwt_dial.html#b6">00606</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#b6">QwtDial::drawScale</a>(QPainter *painter, <span class="keyword">const</span> QPoint &amp;center,
00607     <span class="keywordtype">int</span> radius, <span class="keywordtype">double</span> origin, <span class="keywordtype">double</span> minArc, <span class="keywordtype">double</span> maxArc)<span class="keyword"> const</span>
00608 <span class="keyword"></span>{
00609     <span class="keywordflow">if</span> ( d_scaleDraw == NULL )
00610         <span class="keywordflow">return</span>;
00611 
00612     origin -= 270.0; <span class="comment">// hardcoded origin of QwtScaleDraw</span>
00613 
00614     <span class="keywordtype">double</span> angle = maxArc - minArc;
00615     <span class="keywordflow">if</span> ( angle &gt; 360.0 )
00616         angle = fmod(angle, 360.0);
00617 
00618     minArc += origin;
00619     <span class="keywordflow">if</span> ( minArc &lt; -360.0 )
00620         minArc = fmod(minArc, 360.0);
00621     
00622     maxArc = minArc + angle;
00623     <span class="keywordflow">if</span> ( maxArc &gt; 360.0 )
00624     {
00625         <span class="comment">// QwtScaleDraw::setAngleRange accepts only values</span>
00626         <span class="comment">// in the range [-360.0..360.0]</span>
00627         minArc -= 360.0;
00628         maxArc -= 360.0;
00629     }
00630     
00631     painter-&gt;setFont(font());
00632     painter-&gt;setPen(QPen(colorGroup().text(), d_scaleDraw-&gt;<a class="code" href="class_qwt_dial_scale_draw.html#a5">penWidth</a>()));
00633 
00634     d_scaleDraw-&gt;<a class="code" href="class_qwt_scale_draw.html#a11">setAngleRange</a>(minArc, maxArc);
00635     d_scaleDraw-&gt;<a class="code" href="class_qwt_scale_draw.html#a6">setGeometry</a>(
00636         center.x() - radius + 1, 
00637         center.y() - radius + 1,
00638         2 * radius, QwtScaleDraw::Round);
00639 
00640     d_scaleDraw-&gt;<a class="code" href="class_qwt_scale_draw.html#a29">draw</a>(painter);
00641 }
00642 
<a name="l00643"></a><a class="code" href="class_qwt_dial.html#b7">00643</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#b7">QwtDial::drawScaleContents</a>(QPainter *, 
00644     <span class="keyword">const</span> QPoint &amp;, <span class="keywordtype">int</span>)<span class="keyword"> const</span>
00645 <span class="keyword"></span>{
00646     <span class="comment">// empty default implementation</span>
00647 }
00648 
<a name="l00659"></a><a class="code" href="class_qwt_dial.html#a20">00659</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#a20">QwtDial::setNeedle</a>(<a class="code" href="class_qwt_dial_needle.html">QwtDialNeedle</a> *needle)
00660 {
00661     <span class="keywordflow">if</span> ( needle != d_needle )
00662     {
00663         <span class="keywordflow">if</span> ( d_needle )
00664             <span class="keyword">delete</span> d_needle;
00665 
00666         d_needle = needle;
00667         update();
00668     }
00669 }
00670 
<a name="l00675"></a><a class="code" href="class_qwt_dial.html#a21">00675</a> <span class="keyword">const</span> <a class="code" href="class_qwt_dial_needle.html">QwtDialNeedle</a> *<a class="code" href="class_qwt_dial.html#a21">QwtDial::needle</a>()<span class="keyword"> const </span>
00676 <span class="keyword"></span>{ 
00677     <span class="keywordflow">return</span> d_needle; 
00678 }
00679 
<a name="l00684"></a><a class="code" href="class_qwt_dial.html#a22">00684</a> <a class="code" href="class_qwt_dial_needle.html">QwtDialNeedle</a> *<a class="code" href="class_qwt_dial.html#a21">QwtDial::needle</a>() 
00685 { 
00686     <span class="keywordflow">return</span> d_needle; 
00687 }
00688 
<a name="l00690"></a><a class="code" href="class_qwt_dial.html#b11">00690</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#b11">QwtDial::rangeChange</a>()
00691 {
00692     <a class="code" href="class_qwt_dial.html#b10">updateScale</a>();
00693 }
00694 
<a name="l00699"></a><a class="code" href="class_qwt_dial.html#b10">00699</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#b10">QwtDial::updateScale</a>()
00700 {
00701     <span class="keywordflow">if</span> ( d_scaleDraw )
00702     {
00703         d_scaleDraw-&gt;<a class="code" href="class_qwt_scale_draw.html#a2">setScale</a>(<a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>(), <a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>(),
00704             d_maxMajIntv, d_maxMinIntv, d_scaleStep);
00705     }
00706 }
00707 
<a name="l00713"></a><a class="code" href="class_qwt_dial.html#a28">00713</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#a28">QwtDial::setScaleDraw</a>(<a class="code" href="class_qwt_dial_scale_draw.html">QwtDialScaleDraw</a> *scaleDraw)
00714 {
00715     <span class="keywordflow">if</span> ( scaleDraw != d_scaleDraw )
00716     {
00717         <span class="keywordflow">if</span> ( d_scaleDraw )
00718             <span class="keyword">delete</span> d_scaleDraw;
00719     
00720         d_scaleDraw = scaleDraw;
00721         <a class="code" href="class_qwt_dial.html#b10">updateScale</a>();
00722         update();
00723     }
00724 }
00725 
<a name="l00730"></a><a class="code" href="class_qwt_dial.html#a12">00730</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#a12">QwtDial::setScale</a>(<span class="keywordtype">int</span> maxMajIntv, <span class="keywordtype">int</span> maxMinIntv, <span class="keywordtype">double</span> step)
00731 {
00732     d_maxMajIntv = maxMajIntv;
00733     d_maxMinIntv = maxMinIntv;
00734     d_scaleStep = step;
00735 
00736     <a class="code" href="class_qwt_dial.html#b10">updateScale</a>();
00737 }
00738 
<a name="l00754"></a><a class="code" href="class_qwt_dial.html#a14">00754</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#a14">QwtDial::setScaleOptions</a>(<span class="keywordtype">int</span> options)
00755 {
00756     <span class="keywordflow">if</span> ( options == 0 )
00757         <a class="code" href="class_qwt_dial.html#a28">setScaleDraw</a>(NULL);
00758 
00759     <span class="keywordflow">if</span> ( d_scaleDraw == NULL )
00760         <span class="keywordflow">return</span>;
00761 
00762     <span class="keywordtype">int</span> flags = d_scaleDraw-&gt;<a class="code" href="class_qwt_scale_draw.html#a5">options</a>();
00763     <span class="keywordflow">if</span> ( options &amp; ScaleBackbone )
00764         flags |= QwtScaleDraw::Backbone;
00765     <span class="keywordflow">else</span>
00766         flags &amp;= ~<a class="code" href="class_qwt_scale_draw.html">QwtScaleDraw</a>::Backbone;
00767     d_scaleDraw-&gt;<a class="code" href="class_qwt_scale_draw.html#a4">setOptions</a>(flags);
00768 
00769     <span class="keywordflow">if</span> ( !(options &amp; ScaleTicks) )
00770         d_scaleDraw-&gt;<a class="code" href="class_qwt_scale_draw.html#a15">setTickLength</a>(0, 0, 0);
00771 
00772     d_scaleDraw-&gt;<a class="code" href="class_qwt_dial_scale_draw.html#a2">showLabels</a>(options &amp; ScaleLabel);
00773 }
00774 
<a name="l00776"></a><a class="code" href="class_qwt_dial.html#a15">00776</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#a15">QwtDial::setScaleTicks</a>(<span class="keywordtype">int</span> minLen, <span class="keywordtype">int</span> medLen, 
00777     <span class="keywordtype">int</span> majLen, <span class="keywordtype">int</span> penWidth)
00778 {
00779     <span class="keywordflow">if</span> ( d_scaleDraw )
00780     {
00781         d_scaleDraw-&gt;<a class="code" href="class_qwt_scale_draw.html#a15">setTickLength</a>(minLen, medLen, majLen);
00782         d_scaleDraw-&gt;<a class="code" href="class_qwt_dial_scale_draw.html#a4">setPenWidth</a>(penWidth);
00783     }
00784 }
00785 
<a name="l00789"></a><a class="code" href="class_qwt_dial.html#b9">00789</a> QString <a class="code" href="class_qwt_dial.html#b9">QwtDial::scaleLabel</a>(<span class="keywordtype">double</span> value)<span class="keyword"> const</span>
00790 <span class="keyword"></span>{
00791 <span class="preprocessor">#if 1</span>
00792 <span class="preprocessor"></span>    <span class="keywordflow">if</span> ( value == -0 )
00793         value = 0;
00794 <span class="preprocessor">#endif</span>
00795 <span class="preprocessor"></span>
00796     QString text;
00797     text.sprintf(<span class="stringliteral">"%g"</span>, value);
00798 
00799     <span class="keywordflow">return</span> text;
00800 }
00801 
<a name="l00810"></a><a class="code" href="class_qwt_dial.html#a18">00810</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#a18">QwtDial::setOrigin</a>(<span class="keywordtype">double</span> origin)
00811 {
00812     d_origin = origin;
00813     update();
00814 }
00815 
<a name="l00822"></a><a class="code" href="class_qwt_dial.html#a19">00822</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_dial.html#a19">QwtDial::origin</a>()<span class="keyword"> const</span>
00823 <span class="keyword"></span>{
00824     <span class="keywordflow">return</span> d_origin;
00825 }
00826 
<a name="l00833"></a><a class="code" href="class_qwt_dial.html#a13">00833</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#a13">QwtDial::setScaleArc</a>(<span class="keywordtype">double</span> minArc, <span class="keywordtype">double</span> maxArc)
00834 {
00835     <span class="keywordflow">if</span> ( minArc != 360.0 &amp;&amp; minArc != -360.0 )
00836         minArc = fmod(minArc, 360.0);
00837     <span class="keywordflow">if</span> ( maxArc != 360.0 &amp;&amp; maxArc != -360.0 )
00838         maxArc = fmod(maxArc, 360.0);
00839 
00840     d_minScaleArc = QMIN(minArc, maxArc);
00841     d_maxScaleArc = QMAX(minArc, maxArc);
00842     <span class="keywordflow">if</span> ( d_maxScaleArc - d_minScaleArc &gt; 360.0 )
00843         d_maxScaleArc = d_minScaleArc + 360.0;
00844     
00845     update();
00846 }
00847 
<a name="l00849"></a><a class="code" href="class_qwt_dial.html#b12">00849</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#b12">QwtDial::valueChange</a>()
00850 {
00851     update();
00852     <a class="code" href="class_qwt_slider_base.html#b1">QwtSliderBase::valueChange</a>();
00853 }
00854 
<a name="l00858"></a><a class="code" href="class_qwt_dial.html#a26">00858</a> QSize <a class="code" href="class_qwt_dial.html#a26">QwtDial::sizeHint</a>()<span class="keyword"> const</span>
00859 <span class="keyword"></span>{
00860     <span class="keywordtype">int</span> sh = 0;
00861     <span class="keywordflow">if</span> ( d_scaleDraw )
00862         sh = d_scaleDraw-&gt;<a class="code" href="class_qwt_scale_draw.html#a22">minHeight</a>( QPen(), fontMetrics() );
00863 
00864     <span class="keyword">const</span> <span class="keywordtype">int</span> d = 6 * sh + 2 * <a class="code" href="class_qwt_dial.html#a7">lineWidth</a>();
00865     
00866     <span class="keywordflow">return</span> QSize( d, d );
00867 }
00868 
<a name="l00874"></a><a class="code" href="class_qwt_dial.html#a27">00874</a> QSize <a class="code" href="class_qwt_dial.html#a27">QwtDial::minimumSizeHint</a>()<span class="keyword"> const</span>
00875 <span class="keyword"></span>{   
00876     <span class="keywordtype">int</span> sh = 0;
00877     <span class="keywordflow">if</span> ( d_scaleDraw )
00878         sh = d_scaleDraw-&gt;<a class="code" href="class_qwt_scale_draw.html#a22">minHeight</a>( QPen(), fontMetrics() );
00879 
00880     <span class="keyword">const</span> <span class="keywordtype">int</span> d = 3 * sh + 2 * <a class="code" href="class_qwt_dial.html#a7">lineWidth</a>();
00881     
00882     <span class="keywordflow">return</span> QSize( d, d );
00883 }
00884 
00885 <span class="keyword">static</span> <span class="keywordtype">double</span> line2Radians(<span class="keyword">const</span> QPoint &amp;p1, <span class="keyword">const</span> QPoint &amp;p2)
00886 {
00887     <span class="keyword">const</span> QPoint p = p2 - p1;
00888 
00889     <span class="keywordtype">double</span> angle;
00890     <span class="keywordflow">if</span> ( p.x() == 0 )
00891         angle = ( p.y() &lt;= 0 ) ? M_PI_2 : 3 * M_PI_2;
00892     <span class="keywordflow">else</span>
00893     {
00894         angle = atan(<span class="keywordtype">double</span>(-p.y()) / double(p.x()));
00895         <span class="keywordflow">if</span> ( p.x() &lt; 0 )
00896             angle += M_PI;
00897         <span class="keywordflow">if</span> ( angle &lt; 0.0 )
00898             angle += 2 * M_PI;
00899     }
00900     <span class="keywordflow">return</span> 360.0 - angle * 180.0 / M_PI;
00901 }
00902 
<a name="l00909"></a><a class="code" href="class_qwt_dial.html#b13">00909</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_dial.html#b13">QwtDial::getValue</a>(<span class="keyword">const</span> QPoint &amp;pos)
00910 {
00911     <span class="keywordflow">if</span> ( d_maxScaleArc == d_minScaleArc || <a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>() == <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>() )
00912         <span class="keywordflow">return</span> <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>();
00913 
00914     <span class="keywordtype">double</span> dir = line2Radians(rect().center(), pos) - d_origin;
00915     <span class="keywordflow">if</span> ( dir &lt; 0.0 )
00916         dir += 360.0;
00917 
00918     <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_dial.html#a9">mode</a>() == RotateScale )
00919         dir = 360.0 - dir;
00920 
00921     <span class="comment">// The position might be in the area that is outside the scale arc.</span>
00922     <span class="comment">// We need the range of the scale if it was a complete circle.</span>
00923 
00924     <span class="keyword">const</span> <span class="keywordtype">double</span> completeCircle = 360.0 / (d_maxScaleArc - d_minScaleArc) 
00925         * (<a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>() - <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>());
00926 
00927     <span class="keywordtype">double</span> posValue = <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>() + completeCircle * dir / 360.0;
00928 
00929     <span class="keywordflow">if</span> ( d_scrollMode == ScrMouse )
00930     {
00931         <span class="keywordflow">if</span> ( d_previousDir &gt;= 0.0 ) <span class="comment">// valid direction</span>
00932         {
00933             <span class="comment">// We have to find out whether the mouse is moving</span>
00934             <span class="comment">// clock or counter clockwise</span>
00935 
00936             <span class="keywordtype">bool</span> clockWise = FALSE;
00937 
00938             <span class="keyword">const</span> <span class="keywordtype">double</span> angle = dir - d_previousDir;
00939             <span class="keywordflow">if</span> ( (angle &gt;= 0.0 &amp;&amp; angle &lt;= 180.0) || angle &lt; -180.0 )
00940                 clockWise = TRUE;
00941 
00942             <span class="keywordflow">if</span> ( clockWise )
00943             {
00944                 <span class="keywordflow">if</span> ( dir &lt; d_previousDir &amp;&amp; d_mouseOffset &gt; 0.0 )
00945                 {
00946                     <span class="comment">// We passed 360 -&gt; 0</span>
00947                     d_mouseOffset -= completeCircle;    
00948                 }
00949 
00950                 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_dial.html#a11">wrapping</a>() )
00951                 {
00952                     <span class="keywordflow">if</span> ( posValue - d_mouseOffset &gt; <a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>() )
00953                     {
00954                         <span class="comment">// We passed maxValue and the value will be set</span>
00955                         <span class="comment">// to minValue. We have to adjust the d_mouseOffset.</span>
00956 
00957                         d_mouseOffset = posValue - <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>();
00958                     }
00959                 }
00960                 <span class="keywordflow">else</span>
00961                 {
00962                     <span class="keywordflow">if</span> ( posValue - d_mouseOffset &gt; <a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>() ||
00963                         <a class="code" href="class_qwt_dbl_range.html#a6">value</a>() == <a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>() )
00964                     {
00965                         <span class="comment">// We fix the value at maxValue by adjusting</span>
00966                         <span class="comment">// the mouse offset.</span>
00967 
00968                         d_mouseOffset = posValue - <a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>();
00969                     }
00970                 }
00971             }
00972             <span class="keywordflow">else</span>
00973             {
00974                 <span class="keywordflow">if</span> ( dir &gt; d_previousDir &amp;&amp; d_mouseOffset &lt; 0.0 )
00975                 {
00976                     <span class="comment">// We passed 0 -&gt; 360 </span>
00977                     d_mouseOffset += completeCircle;    
00978                 }
00979 
00980                 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_dial.html#a11">wrapping</a>() )
00981                 {
00982                     <span class="keywordflow">if</span> ( posValue - d_mouseOffset &lt; <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>() )
00983                     {
00984                         <span class="comment">// We passed minValue and the value will be set</span>
00985                         <span class="comment">// to maxValue. We have to adjust the d_mouseOffset.</span>
00986 
00987                         d_mouseOffset = posValue - <a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>();
00988                     }
00989                 }
00990                 <span class="keywordflow">else</span>
00991                 {
00992                     <span class="keywordflow">if</span> ( posValue - d_mouseOffset &lt; <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>() ||
00993                         <a class="code" href="class_qwt_dbl_range.html#a6">value</a>() == <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>() )
00994                     {
00995                         <span class="comment">// We fix the value at minValue by adjusting</span>
00996                         <span class="comment">// the mouse offset.</span>
00997 
00998                         d_mouseOffset = posValue - <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>();
00999                     }
01000                 }
01001             }
01002         }
01003         d_previousDir = dir;
01004     }
01005 
01006     <span class="keywordflow">return</span> posValue;
01007 }
01008 
<a name="l01012"></a><a class="code" href="class_qwt_dial.html#b14">01012</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#b14">QwtDial::getScrollMode</a>(<span class="keyword">const</span> QPoint &amp;p, <span class="keywordtype">int</span> &amp;scrollMode, <span class="keywordtype">int</span> &amp;direction)
01013 {
01014     direction = 0;
01015     scrollMode = ScrNone;
01016 
01017     <span class="keyword">const</span> QRegion region(<a class="code" href="class_qwt_dial.html#a24">contentsRect</a>(), QRegion::Ellipse);
01018     <span class="keywordflow">if</span> ( region.contains(p) &amp;&amp; p != rect().center() )
01019     {
01020         scrollMode = ScrMouse;
01021         d_previousDir = -1.0;
01022     }
01023 }
01024 
<a name="l01044"></a><a class="code" href="class_qwt_dial.html#b2">01044</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_dial.html#b2">QwtDial::keyPressEvent</a>(QKeyEvent *e)
01045 {
01046     <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a9">isReadOnly</a>() )
01047     {
01048 <span class="preprocessor">#if QT_VERSION &gt;= 300</span>
01049 <span class="preprocessor"></span>        e-&gt;ignore();
01050 <span class="preprocessor">#endif</span>
01051 <span class="preprocessor"></span>        <span class="keywordflow">return</span>;
01052     }
01053 
01054     <span class="keywordflow">if</span> ( !<a class="code" href="class_qwt_slider_base.html#a10">isValid</a>() )
01055         <span class="keywordflow">return</span>;
01056 
01057     <span class="keywordtype">double</span> previous = <a class="code" href="class_qwt_dbl_range.html#b2">prevValue</a>();
01058     <span class="keywordflow">switch</span> ( e-&gt;key() )
01059     {
01060         <span class="keywordflow">case</span> Qt::Key_Down:
01061         <span class="keywordflow">case</span> Qt::Key_Left:
01062             <a class="code" href="class_qwt_dbl_range.html#a14">QwtDblRange::incValue</a>(-1);
01063             <span class="keywordflow">break</span>;
01064         <span class="keywordflow">case</span> Qt::Key_Prior:
01065             <a class="code" href="class_qwt_dbl_range.html#a14">QwtDblRange::incValue</a>(-<a class="code" href="class_qwt_dbl_range.html#a13">pageSize</a>());
01066             <span class="keywordflow">break</span>;
01067         <span class="keywordflow">case</span> Qt::Key_Home:
01068             <a class="code" href="class_qwt_slider_base.html#i0">setValue</a>(<a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>());
01069             <span class="keywordflow">break</span>;
01070 
01071         <span class="keywordflow">case</span> Qt::Key_Up:
01072         <span class="keywordflow">case</span> Qt::Key_Right:
01073             <a class="code" href="class_qwt_dbl_range.html#a14">QwtDblRange::incValue</a>(1);
01074             <span class="keywordflow">break</span>;
01075         <span class="keywordflow">case</span> Qt::Key_Next:
01076             <a class="code" href="class_qwt_dbl_range.html#a14">QwtDblRange::incValue</a>(<a class="code" href="class_qwt_dbl_range.html#a13">pageSize</a>());
01077             <span class="keywordflow">break</span>;
01078         <span class="keywordflow">case</span> Qt::Key_End:
01079             <a class="code" href="class_qwt_slider_base.html#i0">setValue</a>(<a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>());
01080             <span class="keywordflow">break</span>;
01081         <span class="keywordflow">default</span>:;
01082 <span class="preprocessor">#if QT_VERSION &gt;= 300</span>
01083 <span class="preprocessor"></span>            e-&gt;ignore();
01084 <span class="preprocessor">#endif</span>
01085 <span class="preprocessor"></span>    }
01086 
01087     <span class="keywordflow">if</span> (<a class="code" href="class_qwt_dbl_range.html#a6">value</a>() != previous)
01088         emit <a class="code" href="class_qwt_slider_base.html#l3">sliderMoved</a>(<a class="code" href="class_qwt_dbl_range.html#a6">value</a>());
01089 }
01090 
</div></pre><hr size="1"><address style="align: right;"><small>Generated on Tue Nov 16 21:12:20 2004 for Qwt User's Guide by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border=0 ></a> 1.3.8 </small></address>
</body>
</html>