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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<h1>qwt_slider.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 <math.h></span>
00013 <span class="preprocessor">#include <qstyle.h></span>
00014 <span class="preprocessor">#include <qevent.h></span>
00015 <span class="preprocessor">#include <qdrawutil.h></span>
00016 <span class="preprocessor">#include <qpainter.h></span>
00017 <span class="preprocessor">#include "qwt_paint_buffer.h"</span>
00018 <span class="preprocessor">#include "qwt_slider.h"</span>
00019
<a name="l00040"></a><a class="code" href="class_qwt_slider.html#a0">00040</a> <a class="code" href="class_qwt_slider.html#a0">QwtSlider::QwtSlider</a>(QWidget *parent, <span class="keyword">const</span> <span class="keywordtype">char</span> *name,
00041 Qt::Orientation orient, ScalePos scalePos, BGSTYLE bgStyle):
00042 <a class="code" href="class_qwt_slider_base.html">QwtSliderBase</a>(orient, parent, name, Qt::WRepaintNoErase|Qt::WResizeNoErase)
00043 {
00044 d_borderWidth = 2;
00045 d_scaleDist = 4;
00046 d_scalePos = scalePos;
00047 d_xMargin = 0;
00048 d_yMargin = 0;
00049 d_bgStyle = bgStyle;
00050
00051 <span class="keywordflow">if</span> (bgStyle == BgSlot)
00052 {
00053 d_thumbLength = 16;
00054 d_thumbWidth = 30;
00055 }
00056 <span class="keywordflow">else</span>
00057 {
00058 d_thumbLength = 31;
00059 d_thumbWidth = 16;
00060 }
00061
00062 d_sliderRect.setRect(0,0,8,8);
00063
00064 QwtScaleDraw::Orientation so;
00065 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Vertical )
00066 {
00067 <span class="comment">// enforce a valid combination of scale position and orientation</span>
00068 <span class="keywordflow">if</span> ((d_scalePos == Bottom) || (d_scalePos == Top))
00069 d_scalePos = None;
00070 <span class="comment">// adopt the policy of layoutSlider (None lays out like Left)</span>
00071 <span class="keywordflow">if</span> (d_scalePos == Right)
00072 so = QwtScaleDraw::Right;
00073 <span class="keywordflow">else</span>
00074 so = QwtScaleDraw::Left;
00075 }
00076 <span class="keywordflow">else</span>
00077 {
00078 <span class="comment">// enforce a valid combination of scale position and orientation</span>
00079 <span class="keywordflow">if</span> ((d_scalePos == Left) || (d_scalePos == Right))
00080 d_scalePos = None;
00081 <span class="comment">// adopt the policy of layoutSlider (None lays out like Bottom)</span>
00082 <span class="keywordflow">if</span> (d_scalePos == Top)
00083 so = QwtScaleDraw::Top;
00084 <span class="keywordflow">else</span>
00085 so = QwtScaleDraw::Bottom;
00086 }
00087
00088 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_scale_draw.html#a6">setGeometry</a>(0,0,100,so);
00089 }
00090
<a name="l00099"></a><a class="code" href="class_qwt_slider.html#a1">00099</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#a1">QwtSlider::setOrientation</a>(Qt::Orientation o)
00100 {
00101 <span class="keywordflow">if</span> (o == Qt::Horizontal)
00102 {
00103 <span class="keywordflow">if</span> ((d_scalePos == Left) || (d_scalePos == Right))
00104 d_scalePos = None;
00105 }
00106 <span class="keywordflow">else</span> <span class="comment">// if (o == Qt::Vertical)</span>
00107 {
00108 <span class="keywordflow">if</span> ((d_scalePos == Bottom) || (d_scalePos == Top))
00109 d_scalePos = None;
00110 }
00111 <a class="code" href="class_qwt_slider_base.html#a7">QwtSliderBase::setOrientation</a>(o);
00112 <a class="code" href="class_qwt_slider.html#b11">layoutSlider</a>();
00113 }
00114
<a name="l00127"></a><a class="code" href="class_qwt_slider.html#a6">00127</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#a6">QwtSlider::setScalePosition</a>(ScalePos s)
00128 {
00129 d_scalePos = s;
00130 <span class="keywordflow">if</span> ((s == Bottom) || (s == Top))
00131 <a class="code" href="class_qwt_slider.html#a1">setOrientation</a>(Qt::Horizontal);
00132 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((s == Left) || (s == Right))
00133 <a class="code" href="class_qwt_slider.html#a1">setOrientation</a>(Qt::Vertical);
00134 <span class="keywordflow">else</span>
00135 <a class="code" href="class_qwt_slider.html#b11">layoutSlider</a>();
00136 }
00137
<a name="l00139"></a><a class="code" href="class_qwt_slider.html#a7">00139</a> <a class="code" href="class_qwt_slider.html#w8">QwtSlider::ScalePos</a> <a class="code" href="class_qwt_slider.html#a7">QwtSlider::scalePosition</a>()<span class="keyword"> const</span>
00140 <span class="keyword"></span>{
00141 <span class="keywordflow">return</span> d_scalePos;
00142 }
00143
<a name="l00148"></a><a class="code" href="class_qwt_slider.html#a13">00148</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#a13">QwtSlider::setBorderWidth</a>(<span class="keywordtype">int</span> bd)
00149 {
00150 <span class="keywordflow">if</span> ( bd < 0 )
00151 bd = 0;
00152
00153 <span class="keywordflow">if</span> ( bd != d_borderWidth )
00154 {
00155 d_borderWidth = bd;
00156 <a class="code" href="class_qwt_slider.html#b11">layoutSlider</a>();
00157 }
00158 }
00159
<a name="l00164"></a><a class="code" href="class_qwt_slider.html#a11">00164</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#a11">QwtSlider::setThumbLength</a>(<span class="keywordtype">int</span> thumbLength)
00165 {
00166 <span class="keywordflow">if</span> ( thumbLength < 8 )
00167 thumbLength = 8;
00168
00169 <span class="keywordflow">if</span> ( thumbLength != d_thumbLength )
00170 {
00171 d_thumbLength = thumbLength;
00172 <a class="code" href="class_qwt_slider.html#b11">layoutSlider</a>();
00173 }
00174 }
00175
<a name="l00180"></a><a class="code" href="class_qwt_slider.html#a12">00180</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#a12">QwtSlider::setThumbWidth</a>(<span class="keywordtype">int</span> w)
00181 {
00182 <span class="keywordflow">if</span> ( w < 4 )
00183 w = 4;
00184
00185 <span class="keywordflow">if</span> ( d_thumbWidth != w )
00186 {
00187 d_thumbWidth = w;
00188 <a class="code" href="class_qwt_slider.html#b11">layoutSlider</a>();
00189 }
00190 }
00191
00192
<a name="l00194"></a><a class="code" href="class_qwt_slider.html#b9">00194</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#b9">QwtSlider::scaleChange</a>()
00195 {
00196 <span class="keywordflow">if</span> (!<a class="code" href="class_qwt_scale_if.html#b0">hasUserScale</a>())
00197 {
00198 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><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>(),
00199 <a class="code" href="class_qwt_scale_if.html#a9">scaleMaxMajor</a>(), <a class="code" href="class_qwt_scale_if.html#a8">scaleMaxMinor</a>(),
00200 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()->scaleDiv().logScale());
00201 }
00202
00203 <a class="code" href="class_qwt_slider.html#b11">layoutSlider</a>();
00204 }
00205
00206
<a name="l00208"></a><a class="code" href="class_qwt_slider.html#b10">00208</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#b10">QwtSlider::fontChange</a>(<span class="keyword">const</span> QFont &f)
00209 {
00210 QwtSliderBase::fontChange( f );
00211 <a class="code" href="class_qwt_slider.html#b11">layoutSlider</a>();
00212 }
00213
<a name="l00215"></a><a class="code" href="class_qwt_slider.html#b3">00215</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#b3">QwtSlider::drawSlider</a>(QPainter *p, <span class="keyword">const</span> QRect &r)
00216 {
00217 QRect cr(r);
00218
00219 <span class="keywordflow">if</span> (d_bgStyle & BgTrough)
00220 {
00221 qDrawShadePanel(p, r.x(), r.y(),
00222 r.width(), r.height(),
00223 colorGroup(), TRUE, d_borderWidth,0);
00224
00225 cr.setRect(r.x() + d_borderWidth,
00226 r.y() + d_borderWidth,
00227 r.width() - 2 * d_borderWidth,
00228 r.height() - 2 * d_borderWidth);
00229
00230 p->fillRect(cr.x(), cr.y(), cr.width(), cr.height(),
00231 colorGroup().brush(QColorGroup::Mid));
00232 }
00233
00234 <span class="keywordflow">if</span> ( d_bgStyle & BgSlot)
00235 {
00236 <span class="keywordtype">int</span> ws = 4;
00237 <span class="keywordtype">int</span> ds = d_thumbLength / 2 - 4;
00238 <span class="keywordflow">if</span> ( ds < 1 )
00239 ds = 1;
00240
00241 QRect rSlot;
00242 <span class="keywordflow">if</span> (<a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Horizontal)
00243 {
00244 <span class="keywordflow">if</span> ( cr.height() & 1 )
00245 ws++;
00246 rSlot = QRect(cr.x() + ds,
00247 cr.y() + (cr.height() - ws) / 2,
00248 cr.width() - 2 * ds, ws);
00249 }
00250 <span class="keywordflow">else</span>
00251 {
00252 <span class="keywordflow">if</span> ( cr.width() & 1 )
00253 ws++;
00254 rSlot = QRect(cr.x() + (cr.width() - ws) / 2,
00255 cr.y() + ds,
00256 ws, cr.height() - 2 * ds);
00257 }
00258 p->fillRect(rSlot.x(), rSlot.y(), rSlot.width(), rSlot.height(),
00259 colorGroup().brush(QColorGroup::Dark));
00260 qDrawShadePanel(p, rSlot.x(), rSlot.y(),
00261 rSlot.width(), rSlot.height(), colorGroup(), TRUE, 1 ,0);
00262
00263 }
00264
00265 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a10">isValid</a>() )
00266 <a class="code" href="class_qwt_slider.html#b4">drawThumb</a>(p, cr, <a class="code" href="class_qwt_slider.html#b12">xyPosition</a>(<a class="code" href="class_qwt_dbl_range.html#a6">value</a>()));
00267 }
00268
<a name="l00270"></a><a class="code" href="class_qwt_slider.html#b4">00270</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#b4">QwtSlider::drawThumb</a>(QPainter *p, <span class="keyword">const</span> QRect &sliderRect, <span class="keywordtype">int</span> pos)
00271 {
00272 pos++; <span class="comment">// shade line points one pixel below</span>
00273 <span class="keywordflow">if</span> (<a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Horizontal)
00274 {
00275 qDrawShadePanel(p, pos - d_thumbLength / 2,
00276 sliderRect.y(), d_thumbLength, sliderRect.height(),
00277 colorGroup(), FALSE, d_borderWidth,
00278 &colorGroup().brush(QColorGroup::Button));
00279
00280 qDrawShadeLine(p, pos, sliderRect.y(),
00281 pos, sliderRect.y() + sliderRect.height() - 2,
00282 colorGroup(), TRUE, 1);
00283 }
00284 <span class="keywordflow">else</span> <span class="comment">// Vertical</span>
00285 {
00286 qDrawShadePanel(p,sliderRect.x(), pos - d_thumbLength / 2,
00287 sliderRect.width(), d_thumbLength,
00288 colorGroup(),FALSE, d_borderWidth,
00289 &colorGroup().brush(QColorGroup::Button));
00290
00291 qDrawShadeLine(p, sliderRect.x(), pos,
00292 sliderRect.x() + sliderRect.width() - 2, pos,
00293 colorGroup(), TRUE, 1);
00294 }
00295 }
00296
<a name="l00298"></a><a class="code" href="class_qwt_slider.html#b12">00298</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_slider.html#b12">QwtSlider::xyPosition</a>(<span class="keywordtype">double</span> v)<span class="keyword"> const</span>
00299 <span class="keyword"></span>{
00300 <span class="keywordtype">int</span> pos;
00301 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>() == <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a11">d1</a>() && <a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>() == <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a12">d2</a>() )
00302 {
00303 <span class="comment">// We prefer to use the transformation of scaleDraw</span>
00304 <span class="comment">// So ticks and marker are always in sync and we don't have</span>
00305 <span class="comment">// to take care of rounding problems.</span>
00306
00307 pos = <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a7">transform</a>(v);
00308 }
00309 <span class="keywordflow">else</span>
00310 {
00311 <span class="comment">// range and scaleDraw differ ? Sounds strange but</span>
00312 <span class="comment">// might happen with logarithmic scales</span>
00313
00314 <span class="keyword">const</span> <span class="keywordtype">double</span> f = (v - <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>());
00315 <span class="keywordtype">double</span> dPos;
00316 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Horizontal )
00317 dPos = <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a13">i1</a>() + f * (<a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a14">i2</a>() - <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a13">i1</a>());
00318 <span class="keywordflow">else</span>
00319 dPos = <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a13">i1</a>() - f * (<a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a13">i1</a>() - <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a14">i2</a>());
00320 pos = qRound(dPos);
00321 }
00322 <span class="keywordflow">return</span> pos;
00323 }
00324
<a name="l00326"></a><a class="code" href="class_qwt_slider.html#b0">00326</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_slider.html#b0">QwtSlider::getValue</a>(<span class="keyword">const</span> QPoint &p)
00327 {
00328 <span class="keywordtype">double</span> rv;
00329
00330 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>() == <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a11">d1</a>() && <a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>() == <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a12">d2</a>() )
00331 {
00332 rv = <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a8">invTransform</a>(
00333 <a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Horizontal ? p.x() : p.y());
00334 }
00335 <span class="keywordflow">else</span>
00336 {
00337 <span class="keywordtype">double</span> pos;
00338 <span class="keywordtype">double</span> range;
00339 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Horizontal )
00340 {
00341 pos = p.x() - <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a13">i1</a>();
00342 range = <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a14">i2</a>() - <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a13">i1</a>();
00343 }
00344 <span class="keywordflow">else</span>
00345 {
00346 pos = <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a13">i1</a>() - p.y();
00347 range = <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a13">i1</a>() - <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a14">i2</a>();
00348 }
00349
00350 rv = <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>() + pos / range * (<a class="code" href="class_qwt_dbl_range.html#a11">maxValue</a>() - <a class="code" href="class_qwt_dbl_range.html#a12">minValue</a>());
00351 }
00352
00353 <span class="keywordflow">return</span>(rv);
00354 }
00355
00356
<a name="l00363"></a><a class="code" href="class_qwt_slider.html#b1">00363</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#b1">QwtSlider::getScrollMode</a>(<span class="keyword">const</span> QPoint &p,
00364 <span class="keywordtype">int</span> &scrollMode, <span class="keywordtype">int</span> &direction )
00365 {
00366 <span class="keywordflow">if</span> (!d_sliderRect.contains(p))
00367 {
00368 scrollMode = ScrNone;
00369 direction = 0;
00370 <span class="keywordflow">return</span>;
00371 }
00372
00373 <span class="keyword">const</span> <span class="keywordtype">int</span> pos = ( <a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Horizontal ) ? p.x() : p.y();
00374 <span class="keyword">const</span> <span class="keywordtype">int</span> markerPos = <a class="code" href="class_qwt_slider.html#b12">xyPosition</a>(<a class="code" href="class_qwt_dbl_range.html#a6">value</a>());
00375
00376 <span class="keywordflow">if</span> ((pos > markerPos - d_thumbLength / 2)
00377 && (pos < markerPos + d_thumbLength / 2))
00378 {
00379 scrollMode = ScrMouse;
00380 direction = 0;
00381 <span class="keywordflow">return</span>;
00382 }
00383
00384 scrollMode = ScrPage;
00385 direction = (pos > markerPos) ? 1 : -1;
00386 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a13">i1</a>() > <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a14">i2</a>() )
00387 direction = -direction;
00388 }
00389
<a name="l00391"></a><a class="code" href="class_qwt_slider.html#b6">00391</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#b6">QwtSlider::paintEvent</a>(QPaintEvent *e)
00392 {
00393 <span class="keyword">const</span> QRect &ur = e->rect();
00394 <span class="keywordflow">if</span> ( ur.isValid() )
00395 {
00396 <a class="code" href="class_qwt_paint_buffer.html">QwtPaintBuffer</a> paintBuffer(<span class="keyword">this</span>, ur);
00397 <a class="code" href="class_qwt_slider.html#b2">draw</a>(paintBuffer.<a class="code" href="class_qwt_paint_buffer.html#a5">painter</a>(), ur);
00398 }
00399 }
00400
<a name="l00402"></a><a class="code" href="class_qwt_slider.html#b2">00402</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#b2">QwtSlider::draw</a>(QPainter *painter, <span class="keyword">const</span> QRect&)
00403 {
00404 <span class="keywordflow">if</span> (d_scalePos != None)
00405 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_scale_draw.html#a29">draw</a>(painter);
00406
00407 <a class="code" href="class_qwt_slider.html#b3">drawSlider</a>(painter, d_sliderRect);
00408 <span class="keywordflow">if</span> ( hasFocus() )
00409 {
00410 <span class="keyword">const</span> QRect rect = d_sliderRect;
00411
00412 <span class="preprocessor">#if QT_VERSION < 300</span>
00413 <span class="preprocessor"></span> style().drawFocusRect(painter, rect, colorGroup());
00414 <span class="preprocessor">#else</span>
00415 <span class="preprocessor"></span> style().drawPrimitive(QStyle::PE_FocusRect, painter,
00416 rect, colorGroup());
00417 <span class="preprocessor">#endif</span>
00418 <span class="preprocessor"></span> }
00419 }
00420
<a name="l00422"></a><a class="code" href="class_qwt_slider.html#b5">00422</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#b5">QwtSlider::resizeEvent</a>(QResizeEvent *)
00423 {
00424 <a class="code" href="class_qwt_slider.html#b11">layoutSlider</a>( FALSE );
00425 }
00426
<a name="l00433"></a><a class="code" href="class_qwt_slider.html#b11">00433</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#b11">QwtSlider::layoutSlider</a>( <span class="keywordtype">bool</span> update_geometry )
00434 {
00435 <span class="keywordtype">int</span> sliderWidth = d_thumbWidth;
00436 <span class="keywordtype">int</span> sld1 = d_thumbLength / 2 - 1;
00437 <span class="keywordtype">int</span> sld2 = d_thumbLength / 2 + d_thumbLength % 2;
00438 <span class="keywordflow">if</span> ( d_bgStyle & BgTrough )
00439 {
00440 sliderWidth += 2 * d_borderWidth;
00441 sld1 += d_borderWidth;
00442 sld2 += d_borderWidth;
00443 }
00444
00445 <span class="keywordtype">int</span> scd = 0;
00446 <span class="keywordflow">if</span> ( d_scalePos != None )
00447 {
00448 <span class="keywordtype">int</span> d1, d2;
00449 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_scale_draw.html#a20">minBorderDist</a>(fontMetrics(), d1, d2);
00450 scd = QMAX(d1, d2);
00451 }
00452
00453 <span class="keywordtype">int</span> slo = scd - sld1;
00454 <span class="keywordflow">if</span> ( slo < 0 )
00455 slo = 0;
00456
00457 <span class="keyword">const</span> QRect r = rect();
00458 <span class="keywordflow">if</span> (<a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Horizontal)
00459 {
00460 <span class="keywordflow">switch</span> (d_scalePos)
00461 {
00462 <span class="keywordflow">case</span> Top:
00463 d_sliderRect.setRect(
00464 r.x() + d_xMargin + slo,
00465 r.y() + r.height() -
00466 d_yMargin - sliderWidth,
00467 r.width() - 2 * d_xMargin - 2 * slo,
00468 sliderWidth);
00469 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_scale_draw.html#a6">setGeometry</a>(
00470 d_sliderRect.x() + sld1,
00471 d_sliderRect.y() - d_scaleDist,
00472 d_sliderRect.width() - sld1 - sld2,
00473 QwtScaleDraw::Top);
00474 <span class="keywordflow">break</span>;
00475
00476 <span class="keywordflow">case</span> Bottom:
00477 d_sliderRect.setRect(
00478 r.x() + d_xMargin + slo,
00479 r.y() + d_yMargin,
00480 r.width() - 2 * d_xMargin - 2 * slo,
00481 sliderWidth);
00482 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_scale_draw.html#a6">setGeometry</a>(
00483 d_sliderRect.x() + sld1,
00484 d_sliderRect.y() + d_sliderRect.height() + d_scaleDist,
00485 d_sliderRect.width() - sld1 - sld2,
00486 QwtScaleDraw::Bottom);
00487 <span class="keywordflow">break</span>;
00488
00489 <span class="keywordflow">case</span> None: <span class="comment">// like Bottom, but no scale. See QwtSlider().</span>
00490 <span class="keywordflow">default</span>: <span class="comment">// inconsistent orientation and scale position</span>
00491 <span class="comment">// QwtScaleDraw is derived from QwtDiMap.</span>
00492 <span class="comment">// The map serves to transform between coordinates and doubles.</span>
00493 d_sliderRect.setRect(
00494 r.x() + d_xMargin + slo,
00495 r.y() + d_yMargin,
00496 r.width() - 2 * d_xMargin - 2 * slo,
00497 sliderWidth);
00498 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a5">setIntRange</a>(
00499 d_sliderRect.x() + sld1,
00500 d_sliderRect.x() + d_sliderRect.width() - sld2 - 1);
00501 <span class="keywordflow">break</span>;
00502 }
00503 }
00504 <span class="keywordflow">else</span> <span class="comment">// if (orientation() == Qt::Vertical</span>
00505 {
00506 <span class="keywordflow">switch</span> (d_scalePos)
00507 {
00508 <span class="keywordflow">case</span> Right:
00509 d_sliderRect.setRect(
00510 r.x() + d_xMargin,
00511 r.y() + d_yMargin + slo,
00512 sliderWidth,
00513 r.height() - 2 * d_yMargin - 2 * slo);
00514 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_scale_draw.html#a6">setGeometry</a>(
00515 d_sliderRect.x() + d_sliderRect.width() + d_scaleDist,
00516 d_sliderRect.y() + sld1,
00517 d_sliderRect.height() - sld1 - sld2,
00518 QwtScaleDraw::Right);
00519 <span class="keywordflow">break</span>;
00520
00521 <span class="keywordflow">case</span> Left:
00522 d_sliderRect.setRect(
00523 r.x() + r.width() - sliderWidth - d_xMargin,
00524 r.y() + d_yMargin + slo,
00525 sliderWidth,
00526 r.height() - 2 * d_yMargin - 2 * slo);
00527 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_scale_draw.html#a6">setGeometry</a>(
00528 d_sliderRect.x() - d_scaleDist,
00529 d_sliderRect.y() + sld1,
00530 d_sliderRect.height() - sld1 - sld2,
00531 QwtScaleDraw::Left);
00532 <span class="keywordflow">break</span>;
00533
00534 <span class="keywordflow">case</span> None: <span class="comment">// like Left, but no scale. See QwtSlider().</span>
00535 <span class="keywordflow">default</span>: <span class="comment">// inconsistent orientation and scale position</span>
00536 <span class="comment">// QwtScaleDraw is derived from QwtDiMap.</span>
00537 <span class="comment">// The map serves to transform between coordinates and doubles.</span>
00538 d_sliderRect.setRect(
00539 r.x() + r.width() - sliderWidth - d_xMargin,
00540 r.y() + d_yMargin + slo,
00541 sliderWidth,
00542 r.height() - 2 * d_yMargin - 2 * slo);
00543 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_di_map.html#a5">setIntRange</a>(
00544 d_sliderRect.y() + d_sliderRect.height() - sld2 - 1,
00545 d_sliderRect.y() + sld1);
00546 <span class="keywordflow">break</span>;
00547 }
00548 }
00549
00550 <span class="keywordflow">if</span> ( update_geometry )
00551 {
00552 updateGeometry();
00553 update();
00554 }
00555 }
00556
<a name="l00558"></a><a class="code" href="class_qwt_slider.html#b7">00558</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#b7">QwtSlider::valueChange</a>()
00559 {
00560 <a class="code" href="class_qwt_slider_base.html#b1">QwtSliderBase::valueChange</a>();
00561 update();
00562 }
00563
00564
<a name="l00566"></a><a class="code" href="class_qwt_slider.html#b8">00566</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#b8">QwtSlider::rangeChange</a>()
00567 {
00568 <span class="keywordflow">if</span> (!<a class="code" href="class_qwt_scale_if.html#b0">hasUserScale</a>())
00569 {
00570 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><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>(),
00571 <a class="code" href="class_qwt_scale_if.html#a9">scaleMaxMajor</a>(), <a class="code" href="class_qwt_scale_if.html#a8">scaleMaxMinor</a>(),
00572 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()->scaleDiv().logScale());
00573 }
00574
00575 <a class="code" href="class_qwt_dbl_range.html#b5">QwtSliderBase::rangeChange</a>();
00576 <a class="code" href="class_qwt_slider.html#b11">layoutSlider</a>();
00577 }
00578
<a name="l00584"></a><a class="code" href="class_qwt_slider.html#a14">00584</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_slider.html#a14">QwtSlider::setMargins</a>(<span class="keywordtype">int</span> xMargin, <span class="keywordtype">int</span> yMargin)
00585 {
00586 <span class="keywordflow">if</span> ( xMargin < 0 )
00587 xMargin = 0;
00588 <span class="keywordflow">if</span> ( yMargin < 0 )
00589 yMargin = 0;
00590
00591 <span class="keywordflow">if</span> ( xMargin != d_xMargin || yMargin != d_yMargin )
00592 {
00593 d_xMargin = xMargin;
00594 d_yMargin = yMargin;
00595 <a class="code" href="class_qwt_slider.html#b11">layoutSlider</a>();
00596 }
00597 }
00598
<a name="l00603"></a><a class="code" href="class_qwt_slider.html#a17">00603</a> QSizePolicy <a class="code" href="class_qwt_slider.html#a17">QwtSlider::sizePolicy</a>()<span class="keyword"> const</span>
00604 <span class="keyword"></span>{
00605 QSizePolicy sp;
00606 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Horizontal )
00607 {
00608 sp.setHorData( QSizePolicy::MinimumExpanding );
00609 sp.setVerData( QSizePolicy::Fixed );
00610 }
00611 <span class="keywordflow">else</span>
00612 {
00613 sp.setHorData( QSizePolicy::Fixed );
00614 sp.setVerData( QSizePolicy::MinimumExpanding );
00615 }
00616 <span class="keywordflow">return</span> sp;
00617 }
00618
<a name="l00622"></a><a class="code" href="class_qwt_slider.html#a15">00622</a> QSize <a class="code" href="class_qwt_slider.html#a15">QwtSlider::sizeHint</a>()<span class="keyword"> const</span>
00623 <span class="keyword"></span>{
00624 <span class="keywordflow">return</span> <a class="code" href="class_qwt_slider.html#a16">minimumSizeHint</a>();
00625 }
00626
<a name="l00632"></a><a class="code" href="class_qwt_slider.html#a16">00632</a> QSize <a class="code" href="class_qwt_slider.html#a16">QwtSlider::minimumSizeHint</a>()<span class="keyword"> const</span>
00633 <span class="keyword"></span>{
00634 <span class="keywordtype">int</span> w = 0, h = 0;
00635
00636 <span class="keywordtype">int</span> sliderWidth = d_thumbWidth;
00637 <span class="keywordflow">if</span> (d_bgStyle & BgTrough)
00638 sliderWidth += 2 * d_borderWidth;
00639
00640 <span class="keywordflow">if</span> (d_scalePos != None)
00641 {
00642 <span class="keywordtype">int</span> msWidth = <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_scale_draw.html#a23">minWidth</a>( QPen(), fontMetrics() );
00643 <span class="keywordtype">int</span> msHeight = <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_scale_draw.html#a22">minHeight</a>( QPen(), fontMetrics() );
00644
00645 <span class="keywordtype">int</span> d1, d2;
00646 <a class="code" href="class_qwt_scale_if.html#a11">scaleDraw</a>()-><a class="code" href="class_qwt_scale_draw.html#a20">minBorderDist</a>(fontMetrics(), d1, d2);
00647 <span class="keywordtype">int</span> msMbd = QMAX(d1, d2);
00648
00649 <span class="keywordtype">int</span> mbd = d_thumbLength / 2;
00650 <span class="keywordflow">if</span> (d_bgStyle & BgTrough)
00651 mbd += d_borderWidth;
00652
00653 <span class="keywordflow">if</span> ( mbd < msMbd )
00654 mbd = msMbd;
00655
00656 <span class="keywordflow">if</span> (<a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Vertical)
00657 {
00658 w = 2 * d_xMargin + sliderWidth + msWidth + d_scaleDist;
00659 h = msHeight - 2 * msMbd + 2 * mbd + 2 * d_yMargin;
00660 }
00661 <span class="keywordflow">else</span>
00662 {
00663 w = msWidth - 2 * msMbd + 2 * mbd + 2 * d_xMargin;
00664 h = 2 * d_yMargin + sliderWidth + msHeight + d_scaleDist;
00665 }
00666 }
00667 <span class="keywordflow">else</span> <span class="comment">// no scale</span>
00668 {
00669 <span class="keywordflow">if</span> (<a class="code" href="class_qwt_slider_base.html#a8">orientation</a>() == Qt::Vertical)
00670 {
00671 w = 2 * d_xMargin + sliderWidth;
00672 h = 200 + 2 * d_yMargin;
00673 }
00674 <span class="keywordflow">else</span>
00675 {
00676 w = 200 + 2 * d_xMargin;
00677 h = 2 * d_yMargin + sliderWidth;
00678 }
00679 }
00680 <span class="keywordflow">return</span> QSize(w,h);
00681 }
00682
00683 <span class="comment">// Local Variables:</span>
00684 <span class="comment">// mode: C++</span>
00685 <span class="comment">// c-file-style: "stroustrup"</span>
00686 <span class="comment">// indent-tabs-mode: nil</span>
00687 <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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