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<h1>qwt_wheel.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 <qevent.h></span>
00011 <span class="preprocessor">#include <qdrawutil.h></span>
00012 <span class="preprocessor">#include <qpainter.h></span>
00013 <span class="preprocessor">#include <qstyle.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_paint_buffer.h"</span>
00016 <span class="preprocessor">#include "qwt_wheel.h"</span>
00017
00018
<a name="l00020"></a><a class="code" href="class_qwt_wheel.html#a0">00020</a> <a class="code" href="class_qwt_wheel.html#a0">QwtWheel::QwtWheel</a>(QWidget *parent, <span class="keyword">const</span> <span class="keywordtype">char</span> *name):
00021 <a class="code" href="class_qwt_slider_base.html">QwtSliderBase</a>(Qt::Horizontal, parent, name,
00022 Qt::WRepaintNoErase|Qt::WResizeNoErase )
00023 {
00024 d_viewAngle = 175.0;
00025 d_totalAngle = 360.0;
00026 d_tickCnt = 10;
00027 d_intBorder = 2;
00028 d_borderWidth = 2;
00029 d_colorCnt = 30;
00030 d_wheelWidth = 20;
00031 d_allocContext = 0;
00032 d_colors = <span class="keyword">new</span> QColor[d_colorCnt];
00033 <a class="code" href="class_qwt_slider_base.html#a2">setUpdateTime</a>(50);
00034 }
00035
<a name="l00037"></a><a class="code" href="class_qwt_wheel.html#a1">00037</a> <a class="code" href="class_qwt_wheel.html#a1">QwtWheel::~QwtWheel</a>()
00038 {
00039 <span class="keywordflow">if</span> ( d_allocContext )
00040 QColor::destroyAllocContext( d_allocContext );
00041 <span class="keyword">delete</span>[] d_colors;
00042 }
00043
<a name="l00045"></a><a class="code" href="class_qwt_wheel.html#b6">00045</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#b6">QwtWheel::setColorArray</a>()
00046 {
00047 <span class="keywordflow">if</span> ( !d_colors )
00048 <span class="keywordflow">return</span>;
00049
00050 QColorGroup g = colorGroup();
00051
00052 <span class="keywordflow">if</span> ( !d_colors[0].isValid() ||
00053 d_colors[0] != g.light() ||
00054 d_colors[d_colorCnt - 1] != g.dark() )
00055 {
00056 <span class="keywordflow">if</span> ( d_allocContext )
00057 QColor::destroyAllocContext( d_allocContext );
00058
00059 d_allocContext = QColor::enterAllocContext();
00060
00061 d_colors[0] = g.light();
00062 d_colors[d_colorCnt - 1] = g.dark();
00063
00064 <span class="keywordtype">int</span> dh, ds, dv, lh, ls, lv;
00065 d_colors[0].rgb(&lh, &ls, &lv);
00066 d_colors[d_colorCnt - 1].rgb(&dh, &ds, &dv);
00067
00068 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 1; i < d_colorCnt - 1; ++i )
00069 {
00070 <span class="keyword">const</span> <span class="keywordtype">double</span> factor = double(i) / double(d_colorCnt);
00071
00072 d_colors[i].setRgb( lh + <span class="keywordtype">int</span>( <span class="keywordtype">double</span>(dh - lh) * factor ),
00073 ls + <span class="keywordtype">int</span>( <span class="keywordtype">double</span>(ds - ls) * factor ),
00074 lv + <span class="keywordtype">int</span>( <span class="keywordtype">double</span>(dv - lv) * factor ));
00075 }
00076 QColor::leaveAllocContext();
00077 }
00078 }
00079
<a name="l00088"></a><a class="code" href="class_qwt_wheel.html#a9">00088</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#a9">QwtWheel::setTickCnt</a>(<span class="keywordtype">int</span> cnt)
00089 {
00090 d_tickCnt = <a class="code" href="qwt__math_8h.html#a37">qwtLim</a>( cnt, 6, 50 );
00091 update();
00092 }
00093
<a name="l00097"></a><a class="code" href="class_qwt_wheel.html#a7">00097</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_wheel.html#a7">QwtWheel::mass</a>()<span class="keyword"> const</span>
00098 <span class="keyword"></span>{
00099 <span class="keywordflow">return</span> <a class="code" href="class_qwt_slider_base.html#a6">QwtSliderBase::mass</a>();
00100 }
00101
00102
00103
<a name="l00114"></a><a class="code" href="class_qwt_wheel.html#a11">00114</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#a11">QwtWheel::setInternalBorder</a>( <span class="keywordtype">int</span> w )
00115 {
00116 <span class="keyword">const</span> <span class="keywordtype">int</span> d = qwtMin( width(), height() ) / 3;
00117 w = qwtMin( w, d );
00118 d_intBorder = qwtMax( w, 1 );
00119 <a class="code" href="class_qwt_wheel.html#b2">layoutWheel</a>();
00120 }
00121
<a name="l00123"></a><a class="code" href="class_qwt_wheel.html#b5">00123</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#b5">QwtWheel::drawWheelBackground</a>( QPainter *p, <span class="keyword">const</span> QRect &r )
00124 {
00125 p->save();
00126
00127 <span class="comment">//</span>
00128 <span class="comment">// initialize pens</span>
00129 <span class="comment">//</span>
00130 <span class="keyword">const</span> QColorGroup g = colorGroup();
00131
00132 QPen lightPen;
00133 lightPen.setColor(g.light());
00134 lightPen.setWidth(d_intBorder);
00135
00136 QPen darkPen;
00137 darkPen.setColor(g.dark());
00138 darkPen.setWidth(d_intBorder);
00139
00140 <a class="code" href="class_qwt_wheel.html#b6">setColorArray</a>();
00141
00142 <span class="comment">//</span>
00143 <span class="comment">// initialize auxiliary variables</span>
00144 <span class="comment">//</span>
00145
00146 <span class="keyword">const</span> <span class="keywordtype">int</span> nFields = d_colorCnt * 13 / 10;
00147 <span class="keyword">const</span> <span class="keywordtype">int</span> hiPos = nFields - d_colorCnt + 1;
00148
00149 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Horizontal )
00150 {
00151 <span class="keyword">const</span> <span class="keywordtype">int</span> rx = r.x();
00152 <span class="keywordtype">int</span> ry = r.y() + d_intBorder;
00153 <span class="keyword">const</span> <span class="keywordtype">int</span> rh = r.height() - 2* d_intBorder;
00154 <span class="keyword">const</span> <span class="keywordtype">int</span> rw = r.width();
00155 <span class="comment">//</span>
00156 <span class="comment">// draw shaded background</span>
00157 <span class="comment">//</span>
00158 <span class="keywordtype">int</span> x1 = rx;
00159 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i < nFields; i++ )
00160 {
00161 <span class="keyword">const</span> <span class="keywordtype">int</span> x2 = rx + (rw * i) / nFields;
00162 p->fillRect(x1, ry, x2-x1 + 1 ,rh, d_colors[qwtAbs(i-hiPos)]);
00163 x1 = x2 + 1;
00164 }
00165 p->fillRect(x1, ry, rw - (x1 - rx), rh, d_colors[d_colorCnt - 1]);
00166
00167 <span class="comment">//</span>
00168 <span class="comment">// draw internal border</span>
00169 <span class="comment">//</span>
00170 p->setPen(lightPen);
00171 ry = r.y() + d_intBorder / 2;
00172 p->drawLine(r.x(), ry, r.x() + r.width() , ry);
00173
00174 p->setPen(darkPen);
00175 ry = r.y() + r.height() - (d_intBorder - d_intBorder / 2);
00176 p->drawLine(r.x(), ry , r.x() + r.width(), ry);
00177 }
00178 <span class="keywordflow">else</span> <span class="comment">// Qt::Vertical</span>
00179 {
00180 <span class="keywordtype">int</span> rx = r.x() + d_intBorder;
00181 <span class="keyword">const</span> <span class="keywordtype">int</span> ry = r.y();
00182 <span class="keyword">const</span> <span class="keywordtype">int</span> rh = r.height();
00183 <span class="keyword">const</span> <span class="keywordtype">int</span> rw = r.width() - 2 * d_intBorder;
00184
00185 <span class="comment">//</span>
00186 <span class="comment">// draw shaded background</span>
00187 <span class="comment">//</span>
00188 <span class="keywordtype">int</span> y1 = ry;
00189 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 1; i < nFields; i++ )
00190 {
00191 <span class="keyword">const</span> <span class="keywordtype">int</span> y2 = ry + (rh * i) / nFields;
00192 p->fillRect(rx, y1, rw, y2-y1 + 1, d_colors[qwtAbs(i-hiPos)]);
00193 y1 = y2 + 1;
00194 }
00195 p->fillRect(rx, y1, rw, rh - (y1 - ry), d_colors[d_colorCnt - 1]);
00196
00197 <span class="comment">//</span>
00198 <span class="comment">// draw internal borders</span>
00199 <span class="comment">//</span>
00200 p->setPen(lightPen);
00201 rx = r.x() + d_intBorder / 2;
00202 p->drawLine(rx, r.y(), rx, r.y() + r.height());
00203
00204 p->setPen(darkPen);
00205 rx = r.x() + r.width() - (d_intBorder - d_intBorder / 2);
00206 p->drawLine(rx, r.y(), rx , r.y() + r.height());
00207 }
00208
00209 p->restore();
00210 }
00211
00212
<a name="l00224"></a><a class="code" href="class_qwt_wheel.html#a8">00224</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#a8">QwtWheel::setTotalAngle</a>(<span class="keywordtype">double</span> angle)
00225 {
00226 d_totalAngle = <a class="code" href="qwt__math_8h.html#a37">qwtLim</a>( angle, 10.0, 3600.0 );
00227 update();
00228 }
00229
<a name="l00237"></a><a class="code" href="class_qwt_wheel.html#a2">00237</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#a2">QwtWheel::setOrientation</a>(Qt::Orientation o)
00238 {
00239 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() != o )
00240 {
00241 <a class="code" href="class_qwt_slider_base.html#a7">QwtSliderBase::setOrientation</a>(o);
00242 <a class="code" href="class_qwt_wheel.html#b2">layoutWheel</a>();
00243 }
00244 }
00245
<a name="l00254"></a><a class="code" href="class_qwt_wheel.html#a10">00254</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#a10">QwtWheel::setViewAngle</a>(<span class="keywordtype">double</span> angle)
00255 {
00256 d_viewAngle = <a class="code" href="qwt__math_8h.html#a37">qwtLim</a>( angle, 10.0, 175.0 );
00257 update();
00258 }
00259
<a name="l00265"></a><a class="code" href="class_qwt_wheel.html#b4">00265</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#b4">QwtWheel::drawWheel</a>( QPainter *p, <span class="keyword">const</span> QRect &r )
00266 {
00267 <span class="keyword">const</span> <span class="keywordtype">double</span> sign = (<a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>() < <a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>()) ? 1.0 : -1.0;
00268 <span class="keywordtype">double</span> cnvFactor = qwtAbs(d_totalAngle / (<a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>() - <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>()));
00269 <span class="keyword">const</span> <span class="keywordtype">double</span> halfIntv = 0.5 * d_viewAngle / cnvFactor;
00270 <span class="keyword">const</span> <span class="keywordtype">double</span> loValue = <a class="code" href="class_qwt_dbl_range.html#a6">value</a>() - halfIntv;
00271 <span class="keyword">const</span> <span class="keywordtype">double</span> hiValue = <a class="code" href="class_qwt_dbl_range.html#a6">value</a>() + halfIntv;
00272 <span class="keyword">const</span> <span class="keywordtype">double</span> tickWidth = 360.0 / double(d_tickCnt) / cnvFactor;
00273 <span class="keyword">const</span> <span class="keywordtype">double</span> sinArc = sin(d_viewAngle * M_PI / 360.0);
00274 cnvFactor *= M_PI / 180.0;
00275
00276 <span class="comment">//</span>
00277 <span class="comment">// draw background gradient</span>
00278 <span class="comment">//</span>
00279 <a class="code" href="class_qwt_wheel.html#b5">drawWheelBackground</a>( p, r );
00280
00281 <span class="comment">//</span>
00282 <span class="comment">// draw grooves</span>
00283 <span class="comment">//</span>
00284 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Horizontal )
00285 {
00286 <span class="keyword">const</span> <span class="keywordtype">double</span> halfSize = double(r.width()) * 0.5;
00287
00288 <span class="keywordtype">int</span> l1 = r.y() + d_intBorder;
00289 <span class="keywordtype">int</span> l2 = r.y() + r.height() - d_intBorder - 1;
00290
00291 <span class="comment">// draw one point over the border if border > 1</span>
00292 <span class="keywordflow">if</span> ( d_intBorder > 1 )
00293 {
00294 l1 --;
00295 l2 ++;
00296 }
00297
00298 <span class="keyword">const</span> <span class="keywordtype">int</span> maxpos = r.x() + r.width() - 2;
00299 <span class="keyword">const</span> <span class="keywordtype">int</span> minpos = r.x() + 2;
00300
00301 <span class="comment">//</span>
00302 <span class="comment">// draw tick marks</span>
00303 <span class="comment">//</span>
00304 <span class="keywordflow">for</span> ( <span class="keywordtype">double</span> tickValue = ceil(loValue / tickWidth) * tickWidth;
00305 tickValue < hiValue; tickValue += tickWidth )
00306 {
00307 <span class="comment">//</span>
00308 <span class="comment">// calculate position</span>
00309 <span class="comment">//</span>
00310 <span class="keyword">const</span> <span class="keywordtype">int</span> tickPos = r.x() + r.width()
00311 - int( halfSize
00312 * (sinArc + sign * sin((tickValue - <a class="code" href="class_qwt_dbl_range.html#a6">value</a>()) * cnvFactor))
00313 / sinArc);
00314 <span class="comment">//</span>
00315 <span class="comment">// draw vertical line</span>
00316 <span class="comment">//</span>
00317 <span class="keywordflow">if</span> ( (tickPos <= maxpos) && (tickPos > minpos) )
00318 {
00319 p->setPen(colorGroup().dark());
00320 p->drawLine(tickPos -1 , l1, tickPos - 1, l2 );
00321 p->setPen(colorGroup().light());
00322 p->drawLine(tickPos, l1, tickPos, l2);
00323 }
00324 }
00325 }
00326 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Vertical )
00327 {
00328 <span class="keyword">const</span> <span class="keywordtype">double</span> halfSize = double(r.height()) * 0.5;
00329
00330 <span class="keywordtype">int</span> l1 = r.x() + d_intBorder;
00331 <span class="keywordtype">int</span> l2 = r.x() + r.width() - d_intBorder - 1;
00332
00333 <span class="keywordflow">if</span> ( d_intBorder > 1 )
00334 {
00335 l1--;
00336 l2++;
00337 }
00338
00339 <span class="keyword">const</span> <span class="keywordtype">int</span> maxpos = r.y() + r.height() - 2;
00340 <span class="keyword">const</span> <span class="keywordtype">int</span> minpos = r.y() + 2;
00341
00342 <span class="comment">//</span>
00343 <span class="comment">// draw tick marks</span>
00344 <span class="comment">//</span>
00345 <span class="keywordflow">for</span> ( <span class="keywordtype">double</span> tickValue = ceil(loValue / tickWidth) * tickWidth;
00346 tickValue < hiValue; tickValue += tickWidth )
00347 {
00348
00349 <span class="comment">//</span>
00350 <span class="comment">// calculate position</span>
00351 <span class="comment">//</span>
00352 <span class="keyword">const</span> <span class="keywordtype">int</span> tickPos = r.y() + int( halfSize *
00353 (sinArc + sign * sin((tickValue - <a class="code" href="class_qwt_dbl_range.html#a6">value</a>()) * cnvFactor))
00354 / sinArc);
00355
00356 <span class="comment">//</span>
00357 <span class="comment">// draw horizontal line</span>
00358 <span class="comment">//</span>
00359 <span class="keywordflow">if</span> ( (tickPos <= maxpos) && (tickPos > minpos) )
00360 {
00361 p->setPen(colorGroup().dark());
00362 p->drawLine(l1, tickPos - 1 ,l2, tickPos - 1);
00363 p->setPen(colorGroup().light());
00364 p->drawLine(l1, tickPos, l2, tickPos);
00365 }
00366 }
00367 }
00368 }
00369
00370
<a name="l00372"></a><a class="code" href="class_qwt_wheel.html#b9">00372</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_wheel.html#b9">QwtWheel::getValue</a>( <span class="keyword">const</span> QPoint &p )
00373 {
00374 <span class="comment">// The reference position is arbitrary, but the</span>
00375 <span class="comment">// sign of the offset is important</span>
00376 <span class="keywordtype">int</span> w, dx;
00377 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Vertical )
00378 {
00379 w = d_sliderRect.height();
00380 dx = d_sliderRect.y() - p.y();
00381 }
00382 <span class="keywordflow">else</span>
00383 {
00384 w = d_sliderRect.width();
00385 dx = p.x() - d_sliderRect.x();
00386 }
00387
00388 <span class="comment">// w pixels is an arc of viewAngle degrees,</span>
00389 <span class="comment">// so we convert change in pixels to change in angle</span>
00390 <span class="keyword">const</span> <span class="keywordtype">double</span> ang = dx * d_viewAngle / w;
00391
00392 <span class="comment">// value range maps to totalAngle degrees,</span>
00393 <span class="comment">// so convert the change in angle to a change in value</span>
00394 <span class="keyword">const</span> <span class="keywordtype">double</span> val = ang * ( <a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>() - <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>() ) / d_totalAngle;
00395
00396 <span class="comment">// Note, range clamping and rasterizing to step is automatically</span>
00397 <span class="comment">// handled by QwtSliderBase, so we simply return the change in value</span>
00398 <span class="keywordflow">return</span> val;
00399 }
00400
<a name="l00402"></a><a class="code" href="class_qwt_wheel.html#b0">00402</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#b0">QwtWheel::resizeEvent</a>(QResizeEvent *)
00403 {
00404 <a class="code" href="class_qwt_wheel.html#b2">layoutWheel</a>( FALSE );
00405 }
00406
00408 <span class="comment">// the current rect and fonts.</span>
00409 <span class="comment">// \param update_geometry notify the layout system and call update</span>
00410 <span class="comment">// to redraw the scale</span>
<a name="l00411"></a><a class="code" href="class_qwt_wheel.html#b2">00411</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#b2">QwtWheel::layoutWheel</a>( <span class="keywordtype">bool</span> update_geometry )
00412 {
00413 <span class="keyword">const</span> QRect r = this->rect();
00414 d_sliderRect.setRect(r.x() + d_borderWidth, r.y() + d_borderWidth,
00415 r.width() - 2*d_borderWidth, r.height() - 2*d_borderWidth);
00416
00417 <span class="keywordflow">if</span> ( update_geometry )
00418 {
00419 updateGeometry();
00420 update();
00421 }
00422 }
00423
<a name="l00425"></a><a class="code" href="class_qwt_wheel.html#b1">00425</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#b1">QwtWheel::paintEvent</a>(QPaintEvent *e)
00426 {
00427 <span class="comment">// Use double-buffering</span>
00428 <span class="keyword">const</span> QRect &ur = e->rect();
00429 <span class="keywordflow">if</span> ( ur.isValid() )
00430 {
00431 <a class="code" href="class_qwt_paint_buffer.html">QwtPaintBuffer</a> paintBuffer(<span class="keyword">this</span>, ur);
00432 <a class="code" href="class_qwt_wheel.html#b3">draw</a>(paintBuffer.<a class="code" href="class_qwt_paint_buffer.html#a5">painter</a>(), ur);
00433 }
00434 }
00435
<a name="l00437"></a><a class="code" href="class_qwt_wheel.html#b3">00437</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#b3">QwtWheel::draw</a>(QPainter *painter, <span class="keyword">const</span> QRect&)
00438 {
00439 QColorGroup cg = colorGroup();
00440
00441 <span class="comment">// Rather than maintain a separate color group</span>
00442 <span class="comment">// for the outer frame, use our parent's cg</span>
00443 QWidget *parent = parentWidget();
00444 <span class="keywordflow">if</span> ( parent )
00445 cg = parent->colorGroup();
00446
00447 qDrawShadePanel( painter, rect().x(), rect().y(),
00448 rect().width(), rect().height(),
00449 cg, TRUE, d_borderWidth );
00450
00451 <a class="code" href="class_qwt_wheel.html#b4">drawWheel</a>( painter, d_sliderRect );
00452
00453 <span class="keywordflow">if</span> ( hasFocus() )
00454 {
00455 QRect r = rect();
00456
00457 <span class="preprocessor">#if QT_VERSION < 300</span>
00458 <span class="preprocessor"></span> style().drawFocusRect(painter, r, colorGroup());
00459 <span class="preprocessor">#else</span>
00460 <span class="preprocessor"></span> style().drawPrimitive(QStyle::PE_FocusRect, painter,
00461 r, colorGroup());
00462 <span class="preprocessor">#endif</span>
00463 <span class="preprocessor"></span> }
00464 }
00465
<a name="l00467"></a><a class="code" href="class_qwt_wheel.html#b7">00467</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#b7">QwtWheel::valueChange</a>()
00468 {
00469 <a class="code" href="class_qwt_slider_base.html#b1">QwtSliderBase::valueChange</a>();
00470 update();
00471 }
00472
00473
<a name="l00481"></a><a class="code" href="class_qwt_wheel.html#b10">00481</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#b10">QwtWheel::getScrollMode</a>( <span class="keyword">const</span> QPoint &p, <span class="keywordtype">int</span> &scrollMode, <span class="keywordtype">int</span> &direction)
00482 {
00483 <span class="keywordflow">if</span> ( d_sliderRect.contains(p) )
00484 scrollMode = ScrMouse;
00485 <span class="keywordflow">else</span>
00486 scrollMode = ScrNone;
00487
00488 direction = 0;
00489 }
00490
<a name="l00497"></a><a class="code" href="class_qwt_wheel.html#a12">00497</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#a12">QwtWheel::setMass</a>(<span class="keywordtype">double</span> val)
00498 {
00499 <a class="code" href="class_qwt_slider_base.html#a5">QwtSliderBase::setMass</a>(val);
00500 }
00501
<a name="l00509"></a><a class="code" href="class_qwt_wheel.html#a13">00509</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#a13">QwtWheel::setWheelWidth</a>(<span class="keywordtype">int</span> w)
00510 {
00511 d_wheelWidth = w;
00512 <a class="code" href="class_qwt_wheel.html#b2">layoutWheel</a>();
00513 }
00514
<a name="l00520"></a><a class="code" href="class_qwt_wheel.html#a16">00520</a> QSizePolicy <a class="code" href="class_qwt_wheel.html#a16">QwtWheel::sizePolicy</a>()<span class="keyword"> const</span>
00521 <span class="keyword"></span>{
00522 QSizePolicy sp;
00523 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Horizontal )
00524 {
00525 sp.setHorData( QSizePolicy::Preferred );
00526 sp.setVerData( QSizePolicy::Fixed );
00527 }
00528 <span class="keywordflow">else</span>
00529 {
00530 sp.setHorData( QSizePolicy::Fixed );
00531 sp.setVerData( QSizePolicy::Preferred );
00532 }
00533 <span class="keywordflow">return</span> sp;
00534 }
00535
<a name="l00539"></a><a class="code" href="class_qwt_wheel.html#a14">00539</a> QSize <a class="code" href="class_qwt_wheel.html#a14">QwtWheel::sizeHint</a>()<span class="keyword"> const</span>
00540 <span class="keyword"></span>{
00541 <span class="keywordflow">return</span> <a class="code" href="class_qwt_wheel.html#a15">minimumSizeHint</a>();
00542 }
00543
<a name="l00548"></a><a class="code" href="class_qwt_wheel.html#a15">00548</a> QSize <a class="code" href="class_qwt_wheel.html#a15">QwtWheel::minimumSizeHint</a>()<span class="keyword"> const</span>
00549 <span class="keyword"></span>{
00550 QSize sz( 3*d_wheelWidth + 2*d_borderWidth,
00551 d_wheelWidth + 2*d_borderWidth );
00552 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() != Qt::Horizontal )
00553 sz.transpose();
00554 <span class="keywordflow">return</span> sz;
00555 }
00556
<a name="l00560"></a><a class="code" href="class_qwt_wheel.html#b8">00560</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_wheel.html#b8">QwtWheel::paletteChange</a>( <span class="keyword">const</span> QPalette& )
00561 {
00562 update();
00563 }
00564
</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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