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|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Qwt User's Guide: qwt_scldraw.cpp Source File</title>
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<h1>qwt_scldraw.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 <stdio.h></span>
00013 <span class="preprocessor">#include <qpainter.h></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_painter.h"</span>
00016 <span class="preprocessor">#include "qwt_scldraw.h"</span>
00017 <span class="preprocessor">#include "qwt_layout_metrics.h"</span>
00018
00019 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> step_eps = 1.0e-6;
00020
<a name="l00029"></a><a class="code" href="class_qwt_scale_draw.html#a0">00029</a> <a class="code" href="class_qwt_scale_draw.html#a0">QwtScaleDraw::QwtScaleDraw</a>():
00030 d_options(Backbone),
00031 d_hpad(4),
00032 d_vpad(4),
00033 d_medLen(6),
00034 d_majLen(8),
00035 d_minLen(4),
00036 d_minAngle(-135 * 16),
00037 d_maxAngle(135 * 16),
00038 d_fmt('g'),
00039 d_prec(4),
00040 d_fieldwidth(0),
00041 d_labelAlignment(0),
00042 d_labelRotation(0.0)
00043 {
00044 <span class="comment">// snprintf is C99 and therefore not portable :-(</span>
00045 <span class="comment">// fieldwidth and precision must be in the range 0, 1, .., 99.</span>
00046 sprintf(d_formatBuffer, <span class="stringliteral">"%%%d.%d%c"</span>, d_fieldwidth, d_prec, d_fmt);
00047 <a class="code" href="class_qwt_scale_draw.html#a6">setGeometry</a>(0,0,100,Bottom);
00048 <a class="code" href="class_qwt_scale_draw.html#a2">setScale</a>(0,100,0,0,10);
00049 }
00050
<a name="l00052"></a><a class="code" href="class_qwt_scale_draw.html#a1">00052</a> <a class="code" href="class_qwt_scale_draw.html#a1">QwtScaleDraw::~QwtScaleDraw</a>()
00053 {
00054 }
00055
<a name="l00057"></a><a class="code" href="class_qwt_scale_draw.html#a4">00057</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a4">QwtScaleDraw::setOptions</a>(<span class="keywordtype">int</span> opt)
00058 {
00059 d_options = opt;
00060 }
00061
<a name="l00065"></a><a class="code" href="class_qwt_scale_draw.html#a5">00065</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a5">QwtScaleDraw::options</a>()<span class="keyword"> const</span>
00066 <span class="keyword"></span>{
00067 <span class="keywordflow">return</span> d_options;
00068 }
00069
<a name="l00082"></a><a class="code" href="class_qwt_scale_draw.html#a3">00082</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a2">QwtScaleDraw::setScale</a>(<span class="keywordtype">double</span> x1, <span class="keywordtype">double</span> x2, <span class="keywordtype">int</span> maxMajIntv,
00083 <span class="keywordtype">int</span> maxMinIntv, <span class="keywordtype">double</span> step, <span class="keywordtype">int</span> logscale)
00084 {
00085 d_scldiv.<a class="code" href="class_qwt_scale_div.html#a12">rebuild</a>( x1, x2, maxMajIntv, maxMinIntv, logscale, step, FALSE );
00086 <a class="code" href="class_qwt_di_map.html#a6">setDblRange</a>( d_scldiv.<a class="code" href="class_qwt_scale_div.html#a3">lBound</a>(), d_scldiv.<a class="code" href="class_qwt_scale_div.html#a4">hBound</a>(), d_scldiv.<a class="code" href="class_qwt_scale_div.html#a7">logScale</a>());
00087 }
00088
00089
<a name="l00094"></a><a class="code" href="class_qwt_scale_draw.html#a2">00094</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a2">QwtScaleDraw::setScale</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_scale_div.html">QwtScaleDiv</a> &sd)
00095 {
00096 d_scldiv = sd;
00097 <a class="code" href="class_qwt_di_map.html#a6">setDblRange</a>(d_scldiv.<a class="code" href="class_qwt_scale_div.html#a3">lBound</a>(),d_scldiv.<a class="code" href="class_qwt_scale_div.html#a4">hBound</a>(),d_scldiv.<a class="code" href="class_qwt_scale_div.html#a7">logScale</a>());
00098 }
00099
<a name="l00104"></a><a class="code" href="class_qwt_scale_draw.html#a29">00104</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a29">QwtScaleDraw::draw</a>(QPainter *p)<span class="keyword"> const</span>
00105 <span class="keyword"></span>{
00106 uint i;
00107
00108 <span class="keywordflow">for</span> (i=0; i< d_scldiv.<a class="code" href="class_qwt_scale_div.html#a6">majCnt</a>(); i++)
00109 {
00110 <span class="keyword">const</span> <span class="keywordtype">double</span> val = d_scldiv.<a class="code" href="class_qwt_scale_div.html#a8">majMark</a>(i);
00111 <a class="code" href="class_qwt_scale_draw.html#b4">drawTick</a>(p, val, d_majLen);
00112 <a class="code" href="class_qwt_scale_draw.html#b6">drawLabel</a>(p, val);
00113 }
00114
00115 <span class="keywordflow">if</span> (d_scldiv.<a class="code" href="class_qwt_scale_div.html#a7">logScale</a>())
00116 {
00117 <span class="keywordflow">for</span> (i=0; i< d_scldiv.<a class="code" href="class_qwt_scale_div.html#a5">minCnt</a>(); i++)
00118 <a class="code" href="class_qwt_scale_draw.html#b4">drawTick</a>(p, d_scldiv.<a class="code" href="class_qwt_scale_div.html#a9">minMark</a>(i), d_minLen);
00119 }
00120 <span class="keywordflow">else</span>
00121 {
00122 <span class="keyword">const</span> <span class="keywordtype">int</span> kmax = d_scldiv.<a class="code" href="class_qwt_scale_div.html#a6">majCnt</a>() - 1;
00123 <span class="keywordflow">if</span> (kmax > 0)
00124 {
00125 <span class="keywordtype">double</span> majTick = d_scldiv.<a class="code" href="class_qwt_scale_div.html#a8">majMark</a>(0);
00126 <span class="keywordtype">double</span> hval = majTick - 0.5 * d_scldiv.<a class="code" href="class_qwt_scale_div.html#a10">majStep</a>();
00127
00128 <span class="keywordtype">int</span> k = 0;
00129 <span class="keywordflow">for</span> (i=0; i< d_scldiv.<a class="code" href="class_qwt_scale_div.html#a5">minCnt</a>(); i++)
00130 {
00131 <span class="keyword">const</span> <span class="keywordtype">double</span> val = d_scldiv.<a class="code" href="class_qwt_scale_div.html#a9">minMark</a>(i);
00132 <span class="keywordflow">if</span> (val > majTick)
00133 {
00134 <span class="keywordflow">if</span> (k < kmax)
00135 {
00136 k++;
00137 majTick = d_scldiv.<a class="code" href="class_qwt_scale_div.html#a8">majMark</a>(k);
00138 }
00139 <span class="keywordflow">else</span>
00140 {
00141 majTick += d_scldiv.<a class="code" href="class_qwt_scale_div.html#a8">majMark</a>(kmax) + d_scldiv.<a class="code" href="class_qwt_scale_div.html#a10">majStep</a>();
00142 }
00143 hval = majTick - 0.5 * d_scldiv.<a class="code" href="class_qwt_scale_div.html#a10">majStep</a>();
00144
00145 }
00146 <span class="keywordflow">if</span> (qwtAbs(val-hval) < step_eps * d_scldiv.<a class="code" href="class_qwt_scale_div.html#a10">majStep</a>())
00147 <a class="code" href="class_qwt_scale_draw.html#b4">drawTick</a>(p, val, d_medLen);
00148 <span class="keywordflow">else</span>
00149 <a class="code" href="class_qwt_scale_draw.html#b4">drawTick</a>(p, val, d_minLen);
00150 }
00151 }
00152 }
00153
00154 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_scale_draw.html#a5">options</a>() & Backbone )
00155 <a class="code" href="class_qwt_scale_draw.html#b5">drawBackbone</a>(p);
00156 }
00157
00158
<a name="l00160"></a><a class="code" href="class_qwt_scale_draw.html#b4">00160</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#b4">QwtScaleDraw::drawTick</a>(QPainter *p, <span class="keywordtype">double</span> val, <span class="keywordtype">int</span> len)<span class="keyword"> const</span>
00161 <span class="keyword"></span>{
00162 <span class="keywordflow">if</span> ( len <= 0 )
00163 <span class="keywordflow">return</span>;
00164
00165 <span class="keyword">const</span> <span class="keywordtype">int</span> tval = <a class="code" href="class_qwt_di_map.html#a7">transform</a>(val);
00166
00167 <span class="keywordflow">switch</span>(d_orient)
00168 {
00169 <span class="keywordflow">case</span> Left:
00170 <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(p, d_xorg, tval, d_xorg - len, tval);
00171 <span class="keywordflow">break</span>;
00172
00173 <span class="keywordflow">case</span> Right:
00174 <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(p, d_xorg, tval, d_xorg + len, tval);
00175 <span class="keywordflow">break</span>;
00176
00177 <span class="keywordflow">case</span> Bottom:
00178 <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(p, tval, d_yorg, tval, d_yorg + len);
00179 <span class="keywordflow">break</span>;
00180
00181 <span class="keywordflow">case</span> Top:
00182 <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(p, tval, d_yorg, tval, d_yorg - len);
00183 <span class="keywordflow">break</span>;
00184
00185 <span class="keywordflow">case</span> Round:
00186 <span class="keywordflow">if</span> ((tval <= d_minAngle + 359 * 16)
00187 || (tval >= d_minAngle - 359 * 16))
00188 {
00189 <span class="keyword">const</span> <span class="keywordtype">double</span> arc = double(tval) / 16.0 * M_PI / 180.0;
00190 <span class="keyword">const</span> <span class="keywordtype">int</span> x1 = qwtInt(d_xCenter + sin(arc) * d_radius);
00191 <span class="keyword">const</span> <span class="keywordtype">int</span> x2 = qwtInt(d_xCenter + sin(arc)
00192 * (d_radius + <span class="keywordtype">double</span>(len)));
00193 <span class="keyword">const</span> <span class="keywordtype">int</span> y1 = qwtInt(d_yCenter - cos(arc) * d_radius);
00194 <span class="keyword">const</span> <span class="keywordtype">int</span> y2 = qwtInt(d_yCenter - cos(arc)
00195 * (d_radius + <span class="keywordtype">double</span>(len)));
00196
00197 <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(p, x1, y1, x2, y2);
00198 }
00199 <span class="keywordflow">break</span>;
00200 }
00201 }
00202
<a name="l00204"></a><a class="code" href="class_qwt_scale_draw.html#b6">00204</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#b6">QwtScaleDraw::drawLabel</a>(QPainter *p, <span class="keywordtype">double</span> val)<span class="keyword"> const</span>
00205 <span class="keyword"></span>{
00206 QPoint pos;
00207 <span class="keywordtype">int</span> alignment;
00208 <span class="keywordtype">double</span> rotation;
00209 <a class="code" href="class_qwt_scale_draw.html#b0">labelPlacement</a>(QFontMetrics(p->font()), val, pos, alignment, rotation);
00210
00211 <span class="keywordflow">if</span> ( alignment )
00212 {
00213 <span class="keyword">const</span> QString txt = <a class="code" href="class_qwt_scale_draw.html#a30">label</a>(val);
00214 <span class="keywordflow">if</span> ( !txt.isEmpty() )
00215 {
00216 QWMatrix m = <a class="code" href="class_qwt_scale_draw.html#b7">labelWorldMatrix</a>(QFontMetrics(p->font()),
00217 pos, alignment, rotation, txt);
00218
00219 p->save();
00220 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00221 <span class="preprocessor"></span> p->setWorldMatrix(m, TRUE);
00222 <span class="preprocessor">#else</span>
00223 <span class="preprocessor"></span> p->translate(m.dx(), m.dy());
00224 <span class="preprocessor">#endif</span>
00225 <span class="preprocessor"></span> <a class="code" href="class_qwt_painter.html#e7">QwtPainter::drawText</a>(p, 0, 0, txt);
00226 p->restore();
00227 }
00228 }
00229 }
00230
<a name="l00232"></a><a class="code" href="class_qwt_scale_draw.html#b0">00232</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#b0">QwtScaleDraw::labelPlacement</a>( <span class="keyword">const</span> QFontMetrics &fm, <span class="keywordtype">double</span> val,
00233 QPoint &pos, <span class="keywordtype">int</span> &alignment, <span class="keywordtype">double</span> &rotation)<span class="keyword"> const</span>
00234 <span class="keyword"></span>{
00235 <span class="comment">// correct rounding errors if val = 0</span>
00236 <span class="keywordflow">if</span> ((!d_scldiv.<a class="code" href="class_qwt_scale_div.html#a7">logScale</a>())
00237 && (qwtAbs(val) < qwtAbs(step_eps * d_scldiv.<a class="code" href="class_qwt_scale_div.html#a10">majStep</a>())))
00238 {
00239 val = 0.0;
00240 }
00241
00242 <span class="keyword">const</span> <span class="keywordtype">int</span> tval = <a class="code" href="class_qwt_di_map.html#a7">transform</a>(val);
00243
00244 <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a7">x</a> = 0;
00245 <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a8">y</a> = 0;
00246 <span class="keywordtype">int</span> align = 0;
00247
00248 <span class="keywordflow">switch</span>(d_orient)
00249 {
00250 <span class="keywordflow">case</span> Right:
00251 {
00252 x = d_xorg + d_majLen + d_hpad + 1;
00253 y = tval;
00254 align = d_labelAlignment;
00255 <span class="keywordflow">if</span> ( align == 0 )
00256 align = Qt::AlignRight | Qt::AlignVCenter;
00257 <span class="keywordflow">break</span>;
00258 }
00259 <span class="keywordflow">case</span> Left:
00260 {
00261 x = d_xorg - d_majLen - d_hpad - 1;
00262 y = tval;
00263 align = d_labelAlignment;
00264 <span class="keywordflow">if</span> ( align == 0 )
00265 align = Qt::AlignLeft | Qt::AlignVCenter;
00266 <span class="keywordflow">break</span>;
00267 }
00268 <span class="keywordflow">case</span> Bottom:
00269 {
00270 x = tval;
00271 y = d_yorg + d_majLen + d_vpad + 1;
00272 align = d_labelAlignment;
00273 <span class="keywordflow">if</span> ( align == 0 )
00274 align = Qt::AlignHCenter | Qt::AlignBottom;
00275 <span class="keywordflow">break</span>;
00276 }
00277 <span class="keywordflow">case</span> Top:
00278 {
00279 x = tval;
00280 y = d_yorg - d_majLen - d_vpad - 1;
00281 align = d_labelAlignment;
00282 <span class="keywordflow">if</span> ( align == 0 )
00283 align = Qt::AlignHCenter | Qt::AlignTop;
00284 <span class="keywordflow">break</span>;
00285 }
00286 <span class="keywordflow">case</span> Round:
00287 {
00288 <span class="keywordflow">if</span> ((tval > d_minAngle + 359 * 16)
00289 || (tval < d_minAngle - 359 * 16))
00290 {
00291 <span class="keywordflow">break</span>;
00292 }
00293
00294 <span class="keyword">const</span> <span class="keywordtype">int</span> fmh = fm.ascent() - 2;
00295 <span class="keyword">const</span> <span class="keywordtype">double</span> arc = tval / 16.0 / 360.0 * 2 * M_PI;
00296 <span class="keyword">const</span> <span class="keywordtype">double</span> radius = d_radius + d_majLen + d_vpad;
00297
00298 <span class="comment">// First we find the point on a circle enlarged</span>
00299 <span class="comment">// by half of the font height.</span>
00300
00301 <span class="keywordtype">double</span> xOffset = ( radius + fmh / 2 ) * sin(arc);
00302 <span class="keywordtype">double</span> yOffset = ( radius + fmh / 2 ) * cos(arc);
00303
00304 <span class="keywordflow">if</span> ( qwtInt(xOffset) != 0 )
00305 {
00306 <span class="comment">// The centered label might cut the circle </span>
00307 <span class="comment">// with distance: d_radius + d_majLen + d_vpad</span>
00308 <span class="comment">// We align the label to the circle by moving</span>
00309 <span class="comment">// the x-coordinate, because we have only</span>
00310 <span class="comment">// horizontal labels here.</span>
00311
00312 <span class="keyword">const</span> <span class="keywordtype">int</span> fmw = fm.width(<a class="code" href="class_qwt_scale_draw.html#a30">label</a>(val));
00313
00314 <span class="keyword">const</span> <span class="keywordtype">double</span> circleX = radius * sin(arc);
00315 <span class="keywordflow">if</span> ( xOffset < 0 )
00316 xOffset = circleX - fmw / 2; <span class="comment">// left</span>
00317 <span class="keywordflow">else</span>
00318 xOffset = circleX + fmw / 2; <span class="comment">// right</span>
00319 }
00320 x = qwtInt(d_xCenter + xOffset);
00321 y = qwtInt(d_yCenter - yOffset);
00322 align = Qt::AlignHCenter | Qt::AlignVCenter;
00323
00324 <span class="keywordflow">break</span>;
00325 }
00326 }
00327
00328 pos = QPoint(x, y);
00329 alignment = align;
00330 rotation = d_labelRotation;
00331 }
00332
00334
<a name="l00335"></a><a class="code" href="class_qwt_scale_draw.html#b7">00335</a> QWMatrix <a class="code" href="class_qwt_scale_draw.html#b7">QwtScaleDraw::labelWorldMatrix</a>(<span class="keyword">const</span> QFontMetrics &fm,
00336 <span class="keyword">const</span> QPoint &pos, <span class="keywordtype">int</span> alignment,
00337 #ifdef QT_NO_TRANSFORMATIONS
00338 <span class="keywordtype">double</span>,
00339 #<span class="keywordflow">else</span>
00340 <span class="keywordtype">double</span> rotation,
00341 #endif
00342 <span class="keyword">const</span> QString &txt)<span class="keyword"> const</span>
00343 <span class="keyword"></span>{
00344 <span class="keyword">const</span> <span class="keywordtype">int</span> w = fm.boundingRect(0, 0,
00345 QCOORD_MAX, QCOORD_MAX, 0, txt).width() - 2;
00346 <span class="keyword">const</span> <span class="keywordtype">int</span> h = fm.ascent() - 2;
00347
00348 <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a7">x</a>, <a class="code" href="class_qwt_scale_draw.html#a8">y</a>;
00349 <span class="keywordflow">if</span> ( alignment & Qt::AlignLeft )
00350 x = -w;
00351 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( alignment & Qt::AlignRight )
00352 x = 0 - w % 2;
00353 <span class="keywordflow">else</span> <span class="comment">// Qt::AlignHCenter</span>
00354 x = -(w / 2);
00355
00356 <span class="keywordflow">if</span> ( alignment & Qt::AlignTop )
00357 y = 0;
00358 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( alignment & Qt::AlignBottom )
00359 y = h - 1;
00360 <span class="keywordflow">else</span> <span class="comment">// Qt::AlignVCenter</span>
00361 y = h / 2;
00362
00363 QWMatrix m;
00364 m.translate(pos.x(), pos.y());
00365 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00366 <span class="preprocessor"></span> m.rotate(rotation);
00367 <span class="preprocessor">#endif</span>
00368 <span class="preprocessor"></span> m.translate(x, y);
00369
00370 <span class="keywordflow">return</span> m;
00371 }
00372
<a name="l00374"></a><a class="code" href="class_qwt_scale_draw.html#b5">00374</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#b5">QwtScaleDraw::drawBackbone</a>(QPainter *p)<span class="keyword"> const</span>
00375 <span class="keyword"></span>{
00376 <span class="keyword">const</span> <span class="keywordtype">int</span> bw2 = p->pen().width() / 2;
00377
00378 <span class="keywordflow">switch</span>(d_orient)
00379 {
00380 <span class="keywordflow">case</span> Left:
00381 <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(p, d_xorg - bw2,
00382 d_yorg, d_xorg - bw2, d_yorg + d_len - 1);
00383 <span class="keywordflow">break</span>;
00384 <span class="keywordflow">case</span> Right:
00385 <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(p, d_xorg + bw2,
00386 d_yorg, d_xorg + bw2, d_yorg + d_len - 1);
00387 <span class="keywordflow">break</span>;
00388 <span class="keywordflow">case</span> Top:
00389 <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(p, d_xorg, d_yorg - bw2,
00390 d_xorg + d_len - 1, d_yorg - bw2);
00391 <span class="keywordflow">break</span>;
00392 <span class="keywordflow">case</span> Bottom:
00393 <a class="code" href="class_qwt_painter.html#e16">QwtPainter::drawLine</a>(p, d_xorg, d_yorg + bw2,
00394 d_xorg + d_len - 1, d_yorg + bw2);
00395 <span class="keywordflow">break</span>;
00396 <span class="keywordflow">case</span> Round:
00397 {
00398 <span class="keyword">const</span> <span class="keywordtype">int</span> a1 = qwtMin(<a class="code" href="class_qwt_di_map.html#a13">i1</a>(), <a class="code" href="class_qwt_di_map.html#a14">i2</a>()) - 90 * 16;
00399 <span class="keyword">const</span> <span class="keywordtype">int</span> a2 = qwtMax(<a class="code" href="class_qwt_di_map.html#a13">i1</a>(), <a class="code" href="class_qwt_di_map.html#a14">i2</a>()) - 90 * 16;
00400
00401 p->drawArc(d_xorg, d_yorg, d_len, d_len,
00402 -a2, a2 - a1 + 1); <span class="comment">// counterclockwise</span>
00403 <span class="keywordflow">break</span>;
00404 }
00405 }
00406 }
00407
00408
<a name="l00448"></a><a class="code" href="class_qwt_scale_draw.html#a6">00448</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a6">QwtScaleDraw::setGeometry</a>(<span class="keywordtype">int</span> xorigin, <span class="keywordtype">int</span> yorigin,
00449 <span class="keywordtype">int</span> length, Orientation o)
00450 {
00451 <span class="keyword">static</span> <span class="keywordtype">int</span> minLen = 10;
00452
00453 d_xorg = xorigin;
00454 d_yorg = yorigin;
00455 d_radius = double(length) * 0.5;
00456 d_xCenter = double(xorigin) + double(length) * 0.5;
00457 d_yCenter = double(yorigin) + double(length) * 0.5;
00458
00459 <span class="keywordflow">if</span> (length > minLen)
00460 d_len = length;
00461 <span class="keywordflow">else</span>
00462 d_len = minLen;
00463
00464 d_orient = o;
00465
00466 <span class="keywordflow">switch</span>(d_orient)
00467 {
00468 <span class="keywordflow">case</span> Left:
00469 <span class="keywordflow">case</span> Right:
00470 <a class="code" href="class_qwt_di_map.html#a5">setIntRange</a>(d_yorg + d_len - 1, d_yorg);
00471 <span class="keywordflow">break</span>;
00472 <span class="keywordflow">case</span> Round:
00473 <a class="code" href="class_qwt_di_map.html#a5">setIntRange</a>(d_minAngle, d_maxAngle);
00474 <span class="keywordflow">break</span>;
00475 <span class="keywordflow">case</span> Top:
00476 <span class="keywordflow">case</span> Bottom:
00477 <a class="code" href="class_qwt_di_map.html#a5">setIntRange</a>(d_xorg, d_xorg + d_len - 1);
00478 <span class="keywordflow">break</span>;
00479 }
00480 }
00481
<a name="l00487"></a><a class="code" href="class_qwt_scale_draw.html#a18">00487</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a18">QwtScaleDraw::maxWidth</a>(<span class="keyword">const</span> QPen &pen, <span class="keyword">const</span> QFontMetrics &fm)<span class="keyword"> const</span>
00488 <span class="keyword"></span>{
00489 <span class="keywordtype">int</span> w = 0;
00490
00491 <span class="keywordflow">switch</span> (d_orient)
00492 {
00493 <span class="keywordflow">case</span> Left:
00494 <span class="keywordflow">case</span> Right:
00495 w += pen.width() + d_majLen + d_hpad + <a class="code" href="class_qwt_scale_draw.html#b2">maxLabelWidth</a>(fm);
00496 <span class="keywordflow">break</span>;
00497 <span class="keywordflow">case</span> Round:
00498 w += pen.width() + d_majLen + d_vpad + <a class="code" href="class_qwt_scale_draw.html#b2">maxLabelWidth</a>(fm);
00499 <span class="keywordflow">break</span>;
00500 <span class="keywordflow">case</span> Top:
00501 <span class="keywordflow">case</span> Bottom:
00502 w = d_len + <a class="code" href="class_qwt_scale_draw.html#b2">maxLabelWidth</a>(fm);
00503 <span class="keywordflow">break</span>;
00504 }
00505 <span class="keywordflow">return</span> w;
00506 }
00507
<a name="l00513"></a><a class="code" href="class_qwt_scale_draw.html#a19">00513</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a19">QwtScaleDraw::maxHeight</a>(<span class="keyword">const</span> QPen &pen, <span class="keyword">const</span> QFontMetrics &fm)<span class="keyword"> const </span>
00514 <span class="keyword"></span>{
00515 <span class="keywordtype">int</span> h = 0;
00516
00517 <span class="keywordflow">switch</span> (d_orient)
00518 {
00519 <span class="keywordflow">case</span> Top:
00520 <span class="keywordflow">case</span> Bottom:
00521 h = pen.width() + d_vpad + d_majLen + <a class="code" href="class_qwt_scale_draw.html#b1">maxLabelHeight</a>(fm);
00522 <span class="keywordflow">break</span>;
00523 <span class="keywordflow">case</span> Left:
00524 <span class="keywordflow">case</span> Right:
00525 h = d_len + <a class="code" href="class_qwt_scale_draw.html#b1">maxLabelHeight</a>(fm);
00526 <span class="keywordflow">break</span>;
00527 <span class="keywordflow">case</span> Round:
00528 h = d_vpad + d_majLen;
00529 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_scale_draw.html#b1">maxLabelHeight</a>(fm) > 0 )
00530 h += fm.ascent() - 2;
00531 <span class="keywordflow">break</span>;
00532 }
00533
00534 <span class="keywordflow">return</span> h;
00535 }
00536
<a name="l00546"></a><a class="code" href="class_qwt_scale_draw.html#a14">00546</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a14">QwtScaleDraw::setLabelRotation</a>(<span class="keywordtype">double</span> rotation)
00547 {
00548 d_labelRotation = rotation;
00549 }
00550
<a name="l00555"></a><a class="code" href="class_qwt_scale_draw.html#a26">00555</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_scale_draw.html#a26">QwtScaleDraw::labelRotation</a>()<span class="keyword"> const</span>
00556 <span class="keyword"></span>{
00557 <span class="keywordflow">return</span> d_labelRotation;
00558 }
00559
<a name="l00579"></a><a class="code" href="class_qwt_scale_draw.html#a13">00579</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a13">QwtScaleDraw::setLabelAlignment</a>(<span class="keywordtype">int</span> alignment)
00580 {
00581 d_labelAlignment = alignment;
00582 }
00583
<a name="l00588"></a><a class="code" href="class_qwt_scale_draw.html#a25">00588</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a25">QwtScaleDraw::labelAlignment</a>()<span class="keyword"> const</span>
00589 <span class="keyword"></span>{
00590 <span class="keywordflow">return</span> d_labelAlignment;
00591 }
00592
<a name="l00611"></a><a class="code" href="class_qwt_scale_draw.html#a11">00611</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a11">QwtScaleDraw::setAngleRange</a>(<span class="keywordtype">double</span> angle1, <span class="keywordtype">double</span> angle2)
00612 {
00613 angle1 = <a class="code" href="qwt__math_8h.html#a37">qwtLim</a>(angle1, -360.0, 360.0);
00614 angle2 = <a class="code" href="qwt__math_8h.html#a37">qwtLim</a>(angle2, -360.0, 360.0);
00615
00616 <span class="keywordtype">int</span> amin = int(floor (qwtMin(angle1, angle2) * 16.0 + 0.5));
00617 <span class="keywordtype">int</span> amax = int(floor (qwtMax(angle1, angle2) * 16.0 + 0.5));
00618
00619 <span class="keywordflow">if</span> (amin == amax)
00620 {
00621 amin -= 1;
00622 amax += 1;
00623 }
00624
00625 d_minAngle = amin;
00626 d_maxAngle = amax;
00627 <a class="code" href="class_qwt_di_map.html#a5">setIntRange</a>(d_minAngle, d_maxAngle);
00628 }
00629
<a name="l00646"></a><a class="code" href="class_qwt_scale_draw.html#a12">00646</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a12">QwtScaleDraw::setLabelFormat</a>(<span class="keywordtype">char</span> f, <span class="keywordtype">int</span> prec, <span class="keywordtype">int</span> fieldwidth)
00647 {
00648 <span class="keywordflow">switch</span>(f)
00649 {
00650 <span class="keywordflow">case</span> <span class="charliteral">'e'</span>:
00651 <span class="keywordflow">case</span> <span class="charliteral">'f'</span>:
00652 <span class="keywordflow">case</span> <span class="charliteral">'g'</span>:
00653 d_fmt = f;
00654 <span class="keywordflow">break</span>;
00655 <span class="keywordflow">default</span>:
00656 <span class="keywordflow">break</span>;
00657 }
00658 <span class="keywordflow">if</span> ((prec > -1) && (prec < 99))
00659 d_prec = prec;
00660 <span class="keywordflow">if</span> ((fieldwidth > -1) && (fieldwidth < 99))
00661 d_fieldwidth = fieldwidth;
00662
00663 sprintf(d_formatBuffer, <span class="stringliteral">"%%%d.%d%c"</span>, d_fieldwidth, d_prec, d_fmt);
00664 }
00665
<a name="l00679"></a><a class="code" href="class_qwt_scale_draw.html#a24">00679</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a24">QwtScaleDraw::labelFormat</a>(<span class="keywordtype">char</span> &f, <span class="keywordtype">int</span> &prec, <span class="keywordtype">int</span> &fieldwidth)<span class="keyword"> const</span>
00680 <span class="keyword"></span>{
00681 f = d_fmt;
00682 prec = d_prec;
00683 fieldwidth = d_fieldwidth;
00684 }
00685
<a name="l00692"></a><a class="code" href="class_qwt_scale_draw.html#a16">00692</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a16">QwtScaleDraw::setMargin</a>(uint hMargin, uint vMargin)
00693 {
00694 d_hpad = hMargin;
00695 d_vpad = vMargin;
00696 }
00697
<a name="l00701"></a><a class="code" href="class_qwt_scale_draw.html#a15">00701</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a15">QwtScaleDraw::setTickLength</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> minLen,
00702 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> medLen, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> majLen)
00703 {
00704 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> maxTickLen = 1000;
00705
00706 d_minLen = QMIN(minLen, maxTickLen);
00707 d_medLen = QMIN(medLen, maxTickLen);
00708 d_majLen = QMIN(majLen, maxTickLen);
00709 }
00710
<a name="l00715"></a><a class="code" href="class_qwt_scale_draw.html#a27">00715</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a27">QwtScaleDraw::tickLength</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> &minLen,
00716 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> &medLen, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> &majLen)<span class="keyword"> const</span>
00717 <span class="keyword"></span>{
00718 minLen = d_minLen;
00719 medLen = d_medLen;
00720 majLen = d_majLen;
00721 }
00722
<a name="l00727"></a><a class="code" href="class_qwt_scale_draw.html#a28">00727</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a28">QwtScaleDraw::majTickLength</a>()<span class="keyword"> const</span>
00728 <span class="keyword"></span>{
00729 <span class="keywordflow">return</span> d_majLen;
00730 }
00731
<a name="l00736"></a><a class="code" href="class_qwt_scale_draw.html#b2">00736</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#b2">QwtScaleDraw::maxLabelWidth</a>(<span class="keyword">const</span> QFontMetrics &fm)<span class="keyword"> const</span>
00737 <span class="keyword"></span>{
00738 <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a18">maxWidth</a> = 0;
00739
00740 <span class="keywordflow">for</span> (uint i = 0; i < d_scldiv.<a class="code" href="class_qwt_scale_div.html#a6">majCnt</a>(); i++)
00741 {
00742 <span class="keywordtype">double</span> val = d_scldiv.<a class="code" href="class_qwt_scale_div.html#a8">majMark</a>(i);
00743
00744 <span class="comment">// correct rounding errors if val = 0</span>
00745
00746 <span class="keywordflow">if</span> ((!d_scldiv.<a class="code" href="class_qwt_scale_div.html#a7">logScale</a>())
00747 && (qwtAbs(val) < step_eps * qwtAbs(d_scldiv.<a class="code" href="class_qwt_scale_div.html#a10">majStep</a>())))
00748 {
00749 val = 0.0;
00750 }
00751
00752 <span class="keyword">const</span> <span class="keywordtype">int</span> w = <a class="code" href="class_qwt_scale_draw.html#b3">labelBoundingRect</a>(fm, val).width();
00753 <span class="keywordflow">if</span> ( w > maxWidth )
00754 maxWidth = w;
00755 }
00756
00757 <span class="keywordflow">return</span> maxWidth;
00758 }
00759
<a name="l00764"></a><a class="code" href="class_qwt_scale_draw.html#b1">00764</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#b1">QwtScaleDraw::maxLabelHeight</a>(<span class="keyword">const</span> QFontMetrics &fm)<span class="keyword"> const</span>
00765 <span class="keyword"></span>{
00766 <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a19">maxHeight</a> = 0;
00767
00768 <span class="keywordflow">for</span> (uint i = 0; i < d_scldiv.<a class="code" href="class_qwt_scale_div.html#a6">majCnt</a>(); i++)
00769 {
00770 <span class="keywordtype">double</span> val = d_scldiv.<a class="code" href="class_qwt_scale_div.html#a8">majMark</a>(i);
00771
00772 <span class="comment">// correct rounding errors if val = 0</span>
00773
00774 <span class="keywordflow">if</span> ((!d_scldiv.<a class="code" href="class_qwt_scale_div.html#a7">logScale</a>())
00775 && (qwtAbs(val) < step_eps * qwtAbs(d_scldiv.<a class="code" href="class_qwt_scale_div.html#a10">majStep</a>())))
00776 {
00777 val = 0.0;
00778 }
00779
00780 <span class="keyword">const</span> <span class="keywordtype">int</span> h = <a class="code" href="class_qwt_scale_draw.html#b3">labelBoundingRect</a>(fm, val).height();
00781 <span class="keywordflow">if</span> ( h > maxHeight )
00782 maxHeight = h;
00783 }
00784
00785 <span class="keywordflow">return</span> maxHeight;
00786 }
00787
<a name="l00793"></a><a class="code" href="class_qwt_scale_draw.html#b3">00793</a> QRect <a class="code" href="class_qwt_scale_draw.html#b3">QwtScaleDraw::labelBoundingRect</a>(
00794 <span class="keyword">const</span> QFontMetrics &fm, <span class="keywordtype">double</span> val)<span class="keyword"> const</span>
00795 <span class="keyword"></span>{
00796 QString zeroString;
00797 <span class="keywordflow">if</span> ( d_fieldwidth > 0 )
00798 zeroString.fill(<span class="charliteral">'0'</span>, d_fieldwidth);
00799
00800 <span class="keyword">const</span> QString lbl = <a class="code" href="class_qwt_scale_draw.html#a30">label</a>(val);
00801
00802 <span class="keyword">const</span> QString &txt = fm.width(zeroString) > fm.width(lbl)
00803 ? zeroString : lbl;
00804 <span class="keywordflow">if</span> ( txt.isEmpty() )
00805 <span class="keywordflow">return</span> QRect(0, 0, 0, 0);
00806
00807 QRect br;
00808
00809 QPoint pos;
00810 <span class="keywordtype">int</span> alignment;
00811 <span class="keywordtype">double</span> rotation;
00812
00813 <a class="code" href="class_qwt_scale_draw.html#b0">labelPlacement</a>(fm, val, pos, alignment, rotation);
00814 <span class="keywordflow">if</span> ( alignment )
00815 {
00816 <span class="comment">// Don't use fm.boundingRect(txt), it cuts off pixels.</span>
00817 <span class="keyword">const</span> <span class="keywordtype">int</span> w = fm.boundingRect(0, 0,
00818 QCOORD_MAX, QCOORD_MAX, 0, txt).width();
00819 <span class="keyword">const</span> <span class="keywordtype">int</span> h = -(fm.ascent() - 2);
00820
00821 QWMatrix m = <a class="code" href="class_qwt_scale_draw.html#b7">labelWorldMatrix</a>(fm, pos, alignment, rotation, txt);
00822 br = QwtMetricsMap::translate(m, QRect(0, 0, w, h));
00823 br.moveBy(-pos.x(), -pos.y());
00824 }
00825
00826 <span class="keywordflow">return</span> br;
00827 }
00828
<a name="l00839"></a><a class="code" href="class_qwt_scale_draw.html#a20">00839</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_scale_draw.html#a20">QwtScaleDraw::minBorderDist</a>(<span class="keyword">const</span> QFontMetrics &fm,
00840 <span class="keywordtype">int</span> &start, <span class="keywordtype">int</span> &end )<span class="keyword"> const</span>
00841 <span class="keyword"></span>{
00842 start = 0;
00843 end = 0;
00844
00845 <span class="keywordflow">if</span> ( d_scldiv.<a class="code" href="class_qwt_scale_div.html#a6">majCnt</a>() > 0 )
00846 {
00847 <span class="keyword">const</span> QRect labelRectMin = <a class="code" href="class_qwt_scale_draw.html#b3">labelBoundingRect</a>(fm, d_scldiv.<a class="code" href="class_qwt_scale_div.html#a8">majMark</a>(0));
00848 <span class="keyword">const</span> QRect labelRectMax = <a class="code" href="class_qwt_scale_draw.html#b3">labelBoundingRect</a>(fm,
00849 d_scldiv.<a class="code" href="class_qwt_scale_div.html#a8">majMark</a>(d_scldiv.<a class="code" href="class_qwt_scale_div.html#a6">majCnt</a>() - 1));
00850
00851 <span class="keywordflow">switch</span> (d_orient)
00852 {
00853 <span class="keywordflow">case</span> Left:
00854 <span class="keywordflow">case</span> Right:
00855 end = -labelRectMin.y();
00856 start = labelRectMax.height() + labelRectMax.y();
00857 <span class="keywordflow">break</span>;
00858 <span class="keywordflow">case</span> Top:
00859 <span class="keywordflow">case</span> Bottom:
00860 start = -labelRectMin.x();
00861 end = labelRectMax.width() + labelRectMax.x();
00862 <span class="keywordflow">break</span>;
00863 <span class="keywordflow">case</span> Round:
00864 start = labelRectMin.width();
00865 end = labelRectMax.width();
00866 <span class="keywordflow">break</span>;
00867 }
00868 }
00869 }
00870
<a name="l00880"></a><a class="code" href="class_qwt_scale_draw.html#a21">00880</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a21">QwtScaleDraw::minLabelDist</a>(<span class="keyword">const</span> QFontMetrics &fm)<span class="keyword"> const</span>
00881 <span class="keyword"></span>{
00882 <span class="keywordflow">if</span> ( d_orient == Round ) <span class="comment">// no implementation</span>
00883 <span class="keywordflow">return</span> 0;
00884
00885 <span class="keywordflow">if</span> (0 == d_scldiv.<a class="code" href="class_qwt_scale_div.html#a6">majCnt</a>())
00886 {
00887 <span class="keywordflow">return</span> 0;
00888 }
00889
00890 <span class="keyword">const</span> <span class="keywordtype">bool</span> vertical = (d_orient == Left || d_orient == Right);
00891
00892 QRect bRect1;
00893 QRect bRect2 = <a class="code" href="class_qwt_scale_draw.html#b3">labelBoundingRect</a>(fm, d_scldiv.<a class="code" href="class_qwt_scale_div.html#a8">majMark</a>(0));
00894 <span class="keywordflow">if</span> ( vertical )
00895 {
00896 bRect2.setRect(-bRect2.bottom(), 0, bRect2.height(), bRect2.width());
00897 }
00898 <span class="keywordtype">int</span> maxDist = 0;
00899
00900 <span class="keywordflow">for</span> (uint i = 1; i < d_scldiv.<a class="code" href="class_qwt_scale_div.html#a6">majCnt</a>(); i++ )
00901 {
00902 bRect1 = bRect2;
00903 bRect2 = <a class="code" href="class_qwt_scale_draw.html#b3">labelBoundingRect</a>(fm, d_scldiv.<a class="code" href="class_qwt_scale_div.html#a8">majMark</a>(i));
00904 <span class="keywordflow">if</span> ( vertical )
00905 {
00906 bRect2.setRect(-bRect2.bottom(), 0,
00907 bRect2.height(), bRect2.width());
00908 }
00909
00910 <span class="keywordtype">int</span> dist = fm.leading(); <span class="comment">// space between the labels</span>
00911 <span class="keywordflow">if</span> ( bRect1.right() > 0 )
00912 dist += bRect1.right();
00913 <span class="keywordflow">if</span> ( bRect2.left() < 0 )
00914 dist += -bRect2.left();
00915
00916 <span class="keywordflow">if</span> ( dist > maxDist )
00917 maxDist = dist;
00918 }
00919
00920 <span class="keywordtype">double</span> angle = d_labelRotation / 180.0 * M_PI;
00921 <span class="keywordflow">if</span> ( vertical )
00922 angle += M_PI / 2;
00923
00924 <span class="keywordflow">if</span> ( sin(angle) == 0.0 )
00925 <span class="keywordflow">return</span> maxDist;
00926
00927 <span class="keyword">const</span> <span class="keywordtype">int</span> fmHeight = fm.ascent() - 2;
00928
00929 <span class="comment">// The distance we need until there is</span>
00930 <span class="comment">// the height of the label font. This height is needed</span>
00931 <span class="comment">// for the neighbour labal.</span>
00932
00933 <span class="keywordtype">int</span> labelDist = (<span class="keywordtype">int</span>)(fmHeight / sin(angle) * cos(angle));
00934 <span class="keywordflow">if</span> ( labelDist < 0 )
00935 labelDist = -labelDist;
00936
00937 <span class="comment">// The cast above floored labelDist. We want to ceil.</span>
00938 labelDist++;
00939
00940 <span class="comment">// For text orientations close to the scale orientation </span>
00941
00942 <span class="keywordflow">if</span> ( labelDist > maxDist )
00943 labelDist = maxDist;
00944
00945 <span class="comment">// For text orientations close to the opposite of the </span>
00946 <span class="comment">// scale orientation</span>
00947
00948 <span class="keywordflow">if</span> ( labelDist < fmHeight )
00949 labelDist = fmHeight;
00950
00951 <span class="keywordflow">return</span> labelDist;
00952 }
00953
<a name="l00960"></a><a class="code" href="class_qwt_scale_draw.html#a22">00960</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a22">QwtScaleDraw::minHeight</a>( <span class="keyword">const</span> QPen &pen, <span class="keyword">const</span> QFontMetrics &fm )<span class="keyword"> const</span>
00961 <span class="keyword"></span>{
00962 <span class="keyword">const</span> <span class="keywordtype">int</span> pw = QMAX( 1, pen.width() ); <span class="comment">// penwidth can be zero</span>
00963
00964 <span class="keywordtype">int</span> h = 0;
00965 <span class="keywordflow">switch</span> ( d_orient )
00966 {
00967 <span class="keywordflow">case</span> Left:
00968 <span class="keywordflow">case</span> Right:
00969 {
00970 <span class="keywordtype">int</span> bottomDist, topDist;
00971 <a class="code" href="class_qwt_scale_draw.html#a20">minBorderDist</a>(fm, bottomDist, topDist);
00972
00973 h = bottomDist + topDist;
00974 <span class="keywordflow">if</span> ( d_scldiv.<a class="code" href="class_qwt_scale_div.html#a6">majCnt</a>() >= 2 )
00975 h += <a class="code" href="class_qwt_scale_draw.html#a21">minLabelDist</a>(fm) * (d_scldiv.<a class="code" href="class_qwt_scale_div.html#a6">majCnt</a>() - 1);
00976
00977 <span class="keywordtype">int</span> th = 2 * (d_scldiv.<a class="code" href="class_qwt_scale_div.html#a6">majCnt</a>() + d_scldiv.<a class="code" href="class_qwt_scale_div.html#a5">minCnt</a>()) * pw;
00978 <span class="keywordflow">if</span> ( th > h )
00979 h = th;
00980 <span class="keywordflow">break</span>;
00981 }
00982 <span class="keywordflow">case</span> Round:
00983 <span class="comment">// compute the radial thickness</span>
00984 h = pw + d_vpad + d_majLen + <a class="code" href="class_qwt_scale_draw.html#b2">maxLabelWidth</a>(fm);
00985 <span class="keywordflow">break</span>;
00986 <span class="keywordflow">case</span> Top:
00987 <span class="keywordflow">case</span> Bottom:
00988 h = pw + d_vpad + d_majLen + <a class="code" href="class_qwt_scale_draw.html#b1">maxLabelHeight</a>(fm);
00989 <span class="keywordflow">break</span>;
00990 }
00991 <span class="keywordflow">return</span> h;
00992 }
00993
<a name="l01000"></a><a class="code" href="class_qwt_scale_draw.html#a23">01000</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a23">QwtScaleDraw::minWidth</a>( <span class="keyword">const</span> QPen &pen, <span class="keyword">const</span> QFontMetrics &fm )<span class="keyword"> const</span>
01001 <span class="keyword"></span>{
01002 <span class="keyword">const</span> <span class="keywordtype">int</span> pw = QMAX( 1, pen.width() ); <span class="comment">// penwidth can be zero</span>
01003
01004 <span class="keywordtype">int</span> w = 0;
01005
01006 <span class="keywordflow">switch</span>(d_orient)
01007 {
01008 <span class="keywordflow">case</span> Left:
01009 <span class="keywordflow">case</span> Right:
01010 {
01011 w = pw + d_hpad + d_majLen + <a class="code" href="class_qwt_scale_draw.html#b2">maxLabelWidth</a>(fm);
01012 <span class="keywordflow">break</span>;
01013 }
01014 <span class="keywordflow">case</span> Round:
01015 {
01016 w = pw + d_vpad + d_majLen + <a class="code" href="class_qwt_scale_draw.html#b2">maxLabelWidth</a>(fm);
01017 <span class="keywordflow">break</span>;
01018 }
01019 <span class="keywordflow">case</span> Top:
01020 <span class="keywordflow">case</span> Bottom:
01021 {
01022 <span class="keywordtype">int</span> leftDist, rightDist;
01023 <a class="code" href="class_qwt_scale_draw.html#a20">minBorderDist</a>(fm, leftDist, rightDist);
01024
01025 w = leftDist + rightDist +
01026 <a class="code" href="class_qwt_scale_draw.html#a21">minLabelDist</a>(fm) * (d_scldiv.<a class="code" href="class_qwt_scale_div.html#a6">majCnt</a>() - 1);
01027
01028 <span class="keywordtype">int</span> tw = 2 * (d_scldiv.<a class="code" href="class_qwt_scale_div.html#a6">majCnt</a>() + d_scldiv.<a class="code" href="class_qwt_scale_div.html#a5">minCnt</a>()) * pw;
01029 <span class="keywordflow">if</span> ( tw > w )
01030 w = tw;
01031
01032 <span class="keywordflow">break</span>;
01033 }
01034 }
01035 <span class="keywordflow">return</span> w;
01036 }
01037
<a name="l01045"></a><a class="code" href="class_qwt_scale_draw.html#a30">01045</a> QString <a class="code" href="class_qwt_scale_draw.html#a30">QwtScaleDraw::label</a>(<span class="keywordtype">double</span> value)<span class="keyword"> const</span>
01046 <span class="keyword"></span>{
01047 <span class="preprocessor">#if 1</span>
01048 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( value == -0 )
01049 value = 0;
01050 <span class="preprocessor">#endif</span>
01051 <span class="preprocessor"></span>
01052 <span class="comment">// snprintf is C99 and therefore not portable :-(</span>
01053 <span class="comment">// sprintf is safe, when buffer is large enough for</span>
01054 <span class="comment">// a minus sign, 99 digits, a radix symbol,</span>
01055 <span class="comment">// an exponent character, a minus or plus sign, 3 digits,</span>
01056 <span class="comment">// and a '\0'.</span>
01057 <span class="keywordtype">char</span> buffer[128];
01058 sprintf(buffer, d_formatBuffer, value);
01059
01060 <span class="keywordflow">return</span> QString::fromLatin1(buffer);
01061 }
01062
<a name="l01064"></a><a class="code" href="class_qwt_scale_draw.html#a7">01064</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a7">QwtScaleDraw::x</a>()<span class="keyword"> const</span>
01065 <span class="keyword"></span>{
01066 <span class="keywordflow">return</span> d_xorg;
01067 }
01068
<a name="l01070"></a><a class="code" href="class_qwt_scale_draw.html#a8">01070</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a8">QwtScaleDraw::y</a>()<span class="keyword"> const</span>
01071 <span class="keyword"></span>{
01072 <span class="keywordflow">return</span> d_yorg;
01073 }
01074
<a name="l01076"></a><a class="code" href="class_qwt_scale_draw.html#a9">01076</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_scale_draw.html#a9">QwtScaleDraw::length</a>()<span class="keyword"> const</span>
01077 <span class="keyword"></span>{
01078 <span class="keywordflow">return</span> d_len;
01079 }
01080
<a name="l01082"></a><a class="code" href="class_qwt_scale_draw.html#a10">01082</a> <a class="code" href="class_qwt_scale_draw.html#w7">QwtScaleDraw::Orientation</a> <a class="code" href="class_qwt_scale_draw.html#a10">QwtScaleDraw::orientation</a>()<span class="keyword"> const </span>
01083 <span class="keyword"></span>{
01084 <span class="keywordflow">return</span> d_orient;
01085 }
01086
01087 <span class="comment">// Local Variables:</span>
01088 <span class="comment">// mode: C++</span>
01089 <span class="comment">// c-file-style: "stroustrup"</span>
01090 <span class="comment">// indent-tabs-mode: nil</span>
01091 <span class="comment">// End:</span>
</div></pre><hr size="1"><address style="align: right;"><small>Generated on Tue Nov 16 21:12:21 2004 for Qwt User's Guide by
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