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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Qwt User's Guide: qwt_autoscl.cpp Source File</title>
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<h1>qwt_autoscl.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 "<a class="code" href="qwt__math_8h.html">qwt_math.h</a>"</span>
00011 <span class="preprocessor">#include "qwt_autoscl.h"</span>
00012
00013
00014 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">double</span> MinEps=1.0e-10;
00015
<a name="l00017"></a><a class="code" href="class_qwt_auto_scale.html#a0">00017</a> <a class="code" href="class_qwt_auto_scale.html#a0">QwtAutoScale::QwtAutoScale</a> ()
00018 {
00019 d_autoScale = TRUE;
00020 d_scaleOpt = None;
00021
00022 d_minValue = 0.0;
00023 d_maxValue = 0.0;
00024 d_scaleMin = 0.0;
00025 d_scaleMax = 0.0;
00026 d_loMargin = 0.0;
00027 d_hiMargin = 0.0;
00028 d_step = 0.0;
00029 d_maxMajor = 8;
00030 d_maxMinor = 5;
00031 d_reset = 1;
00032 d_autoRebuild = TRUE;
00033 }
00034
00035
<a name="l00037"></a><a class="code" href="class_qwt_auto_scale.html#a1">00037</a> <a class="code" href="class_qwt_auto_scale.html#a1">QwtAutoScale::~QwtAutoScale</a> ()
00038 {
00039 }
00040
<a name="l00045"></a><a class="code" href="class_qwt_auto_scale.html#a3">00045</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_auto_scale.html#a3">QwtAutoScale::autoScale</a>()<span class="keyword"> const </span>
00046 <span class="keyword"></span>{
00047 <span class="keywordflow">return</span> d_autoScale;
00048 }
00049
<a name="l00054"></a><a class="code" href="class_qwt_auto_scale.html#a17">00054</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_auto_scale.html#a17">QwtAutoScale::loMargin</a>()<span class="keyword"> const </span>
00055 <span class="keyword"></span>{
00056 <span class="keywordflow">return</span> d_loMargin;
00057 }
00058
<a name="l00063"></a><a class="code" href="class_qwt_auto_scale.html#a18">00063</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_auto_scale.html#a18">QwtAutoScale::hiMargin</a>()<span class="keyword"> const </span>
00064 <span class="keyword"></span>{
00065 <span class="keywordflow">return</span> d_hiMargin;
00066 }
00067
<a name="l00072"></a><a class="code" href="class_qwt_auto_scale.html#a11">00072</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_auto_scale.html#a11">QwtAutoScale::maxMajor</a>()<span class="keyword"> const </span>
00073 <span class="keyword"></span>{
00074 <span class="keywordflow">return</span> d_maxMajor;
00075 }
00076
<a name="l00081"></a><a class="code" href="class_qwt_auto_scale.html#a13">00081</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_auto_scale.html#a13">QwtAutoScale::maxMinor</a>()<span class="keyword"> const </span>
00082 <span class="keyword"></span>{
00083 <span class="keywordflow">return</span> d_maxMinor;
00084 }
00085
00086
<a name="l00100"></a><a class="code" href="class_qwt_auto_scale.html#a21">00100</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a21">QwtAutoScale::adjust</a>(<span class="keywordtype">double</span> *x, <span class="keywordtype">int</span> num, <span class="keywordtype">int</span> reset)
00101 {
00102 <span class="keywordflow">if</span> (d_reset || reset)
00103 d_minValue = d_maxValue = x[0];
00104
00105 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < num; i++)
00106 {
00107 <span class="keywordflow">if</span> (x[i] > d_maxValue)
00108 d_maxValue = x[i];
00109 <span class="keywordflow">if</span> (x[i] < d_minValue)
00110 d_minValue = x[i];
00111 }
00112 d_reset = 0;
00113
00114 <span class="keywordflow">if</span> (d_autoRebuild)
00115 <a class="code" href="class_qwt_auto_scale.html#a24">build</a>();
00116 }
00117
00118
<a name="l00131"></a><a class="code" href="class_qwt_auto_scale.html#a22">00131</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a21">QwtAutoScale::adjust</a>(<span class="keyword">const</span> QwtArray<double> &x, <span class="keywordtype">int</span> reset)
00132 {
00133 <a class="code" href="class_qwt_auto_scale.html#a21">adjust</a>(x.data(), x.size(), reset);
00134 }
00135
00136
<a name="l00150"></a><a class="code" href="class_qwt_auto_scale.html#a23">00150</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a21">QwtAutoScale::adjust</a>(<span class="keywordtype">double</span> vmin, <span class="keywordtype">double</span> vmax, <span class="keywordtype">int</span> reset)
00151 {
00152 <span class="keywordtype">double</span> mxv = qwtMax(vmin,vmax);
00153 <span class="keywordtype">double</span> mnv = qwtMin(vmin,vmax);
00154
00155 <span class="keywordflow">if</span> (d_reset || reset)
00156 {
00157 d_minValue = mnv;
00158 d_maxValue = mxv;
00159 }
00160 <span class="keywordflow">else</span>
00161 {
00162 <span class="keywordflow">if</span> (d_minValue > mnv)
00163 d_minValue = mnv;
00164 <span class="keywordflow">if</span> (d_maxValue < mxv)
00165 d_maxValue = mxv;
00166 }
00167 d_reset = 0;
00168
00169 <span class="keywordflow">if</span> (d_autoRebuild)
00170 <a class="code" href="class_qwt_auto_scale.html#a24">build</a>();
00171 }
00172
<a name="l00176"></a><a class="code" href="class_qwt_auto_scale.html#a24">00176</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a24">QwtAutoScale::build</a>()
00177 {
00178 <span class="keywordflow">if</span> (d_reset)
00179 <span class="keywordflow">return</span>;
00180
00181 <span class="keywordflow">if</span> (d_autoScale)
00182 {
00183 <span class="keywordflow">if</span> (d_scaleOpt & Logarithmic)
00184 <a class="code" href="class_qwt_auto_scale.html#b1">buildLogScale</a>();
00185 <span class="keywordflow">else</span>
00186 <a class="code" href="class_qwt_auto_scale.html#b0">buildLinScale</a>();
00187 }
00188 <span class="keywordflow">else</span>
00189 {
00190 <span class="keywordtype">double</span> start, stop, step;
00191 <span class="keywordflow">if</span> (d_scaleOpt & Inverted)
00192 {
00193 start = d_scaleMax;
00194 stop = d_scaleMin;
00195 step = -d_step;
00196 }
00197 <span class="keywordflow">else</span>
00198 {
00199 start = d_scaleMin;
00200 stop = d_scaleMax;
00201 step = d_step;
00202 }
00203
00204 d_scldiv.<a class="code" href="class_qwt_scale_div.html#a12">rebuild</a>(start, stop, d_maxMajor, d_maxMinor,
00205 <span class="keywordtype">bool</span>(d_scaleOpt & Logarithmic), step, FALSE);
00206 }
00207 }
00208
00209
<a name="l00213"></a><a class="code" href="class_qwt_auto_scale.html#b0">00213</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#b0">QwtAutoScale::buildLinScale</a> ()
00214 {
00215 <span class="keywordtype">double</span> delta;
00216 <span class="keyword">const</span> <span class="keywordtype">double</span> ticks = double (d_maxMajor);
00217
00218 <span class="comment">//</span>
00219 <span class="comment">// If in Autoscale Mode, adjust minval and maxval according to</span>
00220 <span class="comment">// the active scale options, and add the margins</span>
00221 <span class="comment">//</span>
00222 <span class="keywordflow">if</span> (!d_autoScale)
00223 <span class="keywordflow">return</span>;
00224
00225 <span class="keywordtype">double</span> minval = d_minValue; <span class="comment">// scale boundaries are based on the</span>
00226 <span class="keywordtype">double</span> maxval = d_maxValue; <span class="comment">// data.</span>
00227
00228 <span class="comment">//</span>
00229 <span class="comment">// add / subtract margins</span>
00230 <span class="comment">//</span>
00231 <span class="keywordflow">if</span> (d_loMargin > 0.0)
00232 minval -= d_loMargin;
00233 <span class="keywordflow">if</span> (d_hiMargin > 0.0)
00234 maxval += d_hiMargin;
00235
00236 <span class="comment">//</span>
00237 <span class="comment">// Correct minval / maxval according to the scale options</span>
00238 <span class="comment">//</span>
00239 <span class="keywordflow">if</span> (d_scaleOpt & Symmetric)
00240 {
00241 delta = qwtMax(qwtAbs(d_ref - maxval), qwtAbs(d_ref - minval));
00242 maxval = d_ref + delta;
00243 minval = d_ref - delta;
00244 }
00245 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (d_scaleOpt & IncludeRef)
00246 {
00247 <span class="keywordflow">if</span> (maxval < d_ref)
00248 maxval = d_ref;
00249 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (minval > d_ref)
00250 minval = d_ref;
00251 }
00252
00253 <span class="comment">//</span>
00254 <span class="comment">// first approximation of d_scaleMin and d_scaleMax</span>
00255 <span class="comment">//</span>
00256 <a class="code" href="class_qwt_auto_scale.html#b2">setRange</a>(minval, maxval);
00257 delta = d_scaleMax - d_scaleMin;
00258
00259
00260 <span class="comment">// dec := maximal power of ten which fits into the interval</span>
00261 <span class="comment">// [d_scaleMin,d_scaleMax]</span>
00262 <span class="keyword">const</span> <span class="keywordtype">double</span> dec = pow (10.0, floor (log10 (delta)));
00263
00264 <span class="comment">//</span>
00265 <span class="comment">// The following magic line calculates the step size such that</span>
00266 <span class="comment">// - The number of subintervals will not exceed the maximum</span>
00267 <span class="comment">// as specified by the user</span>
00268 <span class="comment">// - The step size fits {1,2,5}*10^n with a natural number n </span>
00269 <span class="comment">// </span>
00270 <span class="keywordtype">double</span> step = qwtCeil125(delta * 0.999999 / dec / ticks) * dec;
00271
00272 <span class="comment">//</span>
00273 <span class="comment">// determine he final values of scaleMin and scaleMax</span>
00274 <span class="comment">//</span>
00275 <span class="keywordflow">if</span> (! (d_scaleOpt & Floating) )
00276 {
00277 <span class="comment">// adjust of d_scaleMin and d_scaleMax such that both are integer</span>
00278 <span class="comment">// multiples of the step size.</span>
00279 d_scaleMin = step * floor ((d_scaleMin + MinEps * step) / step);
00280 d_scaleMax = step * ceil ((d_scaleMax - MinEps * step) / step);
00281 }
00282
00283 <span class="keywordflow">if</span> (d_scaleOpt & Inverted)
00284 {
00285 step = -step;
00286 d_scldiv.<a class="code" href="class_qwt_scale_div.html#a12">rebuild</a>(d_scaleMax, d_scaleMin, d_maxMajor, d_maxMinor,
00287 FALSE, step, FALSE);
00288 }
00289 <span class="keywordflow">else</span>
00290 {
00291 d_scldiv.<a class="code" href="class_qwt_scale_div.html#a12">rebuild</a>(d_scaleMin, d_scaleMax, d_maxMajor, d_maxMinor,
00292 FALSE, step, TRUE);
00293 }
00294 }
00295
00296
<a name="l00300"></a><a class="code" href="class_qwt_auto_scale.html#b1">00300</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#b1">QwtAutoScale::buildLogScale</a> ()
00301 {
00302 <span class="keywordflow">if</span> (!d_autoScale)
00303 <span class="keywordflow">return</span>;
00304
00305 <span class="keywordtype">double</span> minval = d_minValue; <span class="comment">// the calculation of scale divisions </span>
00306 <span class="keywordtype">double</span> maxval = d_maxValue; <span class="comment">// is based on the input data.</span>
00307
00308 <span class="keywordflow">if</span> (d_loMargin > 0.0)
00309 minval /= pow(10.0, d_loMargin);
00310 <span class="keywordflow">if</span> (d_hiMargin > 0.0)
00311 maxval *= pow(10.0, d_hiMargin);
00312
00313 <span class="keywordflow">if</span> (d_scaleOpt & Symmetric)
00314 {
00315 <span class="keyword">const</span> <span class="keywordtype">double</span> delta = qwtMax(maxval / d_lref, d_lref / minval);
00316 maxval = d_lref * delta;
00317 minval = d_lref / delta;
00318 }
00319 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (d_scaleOpt & IncludeRef)
00320 {
00321 <span class="keywordflow">if</span> (maxval < d_lref)
00322 maxval = d_lref;
00323 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (minval > d_lref)
00324 minval = d_lref;
00325 }
00326
00327 <span class="keyword">const</span> <span class="keywordtype">double</span> ticks = (d_maxMajor > 0) ? double(d_maxMajor) : 1;
00328
00329 <a class="code" href="class_qwt_auto_scale.html#b2">setRange</a>(minval, maxval);
00330
00331 <span class="comment">// decades included in the interval</span>
00332 <span class="keyword">const</span> <span class="keywordtype">double</span> decades = qwtAbs(log10 (d_scaleMax / d_scaleMin));
00333
00334 <span class="comment">// calculate step size in decades</span>
00335
00336 <span class="keywordtype">double</span> step;
00337 <span class="keywordflow">if</span> ((decades > 1.0) && (decades > ticks))
00338 {
00339 <span class="keywordtype">double</span> ipart;
00340 <span class="comment">// One interval contains more than one decade.</span>
00341 <span class="comment">// The number of decades in an interval is adjusted</span>
00342 <span class="comment">// to be a multiple of 2,3,5, or 10.</span>
00343 <span class="keywordtype">double</span> fpart = modf (log10 (ceil (decades * 0.999999 / ticks)), &ipart);
00344 <span class="keywordflow">if</span> (fpart < MinEps)
00345 fpart = 1.0;
00346 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((fpart - LOG10_2) < MinEps)
00347 fpart = 2.0;
00348 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((fpart - LOG10_3) < MinEps)
00349 fpart = 3.0;
00350 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((fpart - LOG10_5) < MinEps)
00351 fpart = 5.0;
00352 <span class="keywordflow">else</span>
00353 fpart = 10.0;
00354
00355 step = pow (10.0, ipart) * fpart;
00356
00357 }
00358 <span class="keywordflow">else</span> <span class="comment">// The minimal step size is one decade.</span>
00359 {
00360 step = 1.0;
00361 }
00362
00363 <span class="keywordflow">if</span> (!(d_scaleOpt & Floating))
00364 {
00365 d_scaleMin = pow (10.0, step *
00366 floor ((log10(d_scaleMin) + MinEps * step) / step));
00367 d_scaleMax = pow (10.0, step *
00368 ceil ((log10(d_scaleMax) - MinEps * step) / step));
00369 }
00370
00371 <span class="keywordflow">if</span> (d_scaleOpt & Inverted)
00372 {
00373 step = -step;
00374 d_scldiv.<a class="code" href="class_qwt_scale_div.html#a12">rebuild</a>(d_scaleMax, d_scaleMin, d_maxMajor, d_maxMinor, TRUE,
00375 step, FALSE);
00376 }
00377 <span class="keywordflow">else</span>
00378 {
00379 d_scldiv.<a class="code" href="class_qwt_scale_div.html#a12">rebuild</a>(d_scaleMin, d_scaleMax, d_maxMajor, d_maxMinor,
00380 TRUE, step, TRUE);
00381 }
00382 }
00383
<a name="l00391"></a><a class="code" href="class_qwt_auto_scale.html#a6">00391</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a6">QwtAutoScale::changeOptions</a>(<span class="keywordtype">int</span> opt, <span class="keywordtype">bool</span> tf)
00392 {
00393 <span class="keywordflow">if</span> (tf)
00394 d_scaleOpt |= opt;
00395 <span class="keywordflow">else</span>
00396 d_scaleOpt &= (~opt);
00397 <a class="code" href="class_qwt_auto_scale.html#a24">build</a>();
00398 }
00399
00400
<a name="l00413"></a><a class="code" href="class_qwt_auto_scale.html#a25">00413</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a25">QwtAutoScale::reset</a>()
00414 {
00415 d_reset = TRUE;
00416 d_scldiv.<a class="code" href="class_qwt_scale_div.html#a11">reset</a>();
00417 d_minValue = 0;
00418 d_maxValue = 0;
00419 d_step = 0;
00420 }
00421
00422
<a name="l00439"></a><a class="code" href="class_qwt_auto_scale.html#a2">00439</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a2">QwtAutoScale::setAutoScale</a>()
00440 {
00441 d_autoScale = TRUE;
00442 <a class="code" href="class_qwt_auto_scale.html#a24">build</a>();
00443 }
00444
<a name="l00461"></a><a class="code" href="class_qwt_auto_scale.html#a16">00461</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a16">QwtAutoScale::setMargins</a>(<span class="keywordtype">double</span> mlo, <span class="keywordtype">double</span> mhi)
00462 {
00463 d_loMargin = qwtMax(mlo,0.0);
00464 d_hiMargin = qwtMax(mhi,0.0);
00465 <a class="code" href="class_qwt_auto_scale.html#a24">build</a>();
00466 }
00467
00468
<a name="l00477"></a><a class="code" href="class_qwt_auto_scale.html#a10">00477</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a10">QwtAutoScale::setMaxMajor</a>(<span class="keywordtype">int</span> mx)
00478 {
00479 d_maxMajor = qwtMax(mx,1);
00480 d_maxMajor = qwtMin(mx, 10000);
00481 <a class="code" href="class_qwt_auto_scale.html#a24">build</a>();
00482 }
00483
<a name="l00489"></a><a class="code" href="class_qwt_auto_scale.html#a12">00489</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a12">QwtAutoScale::setMaxMinor</a>(<span class="keywordtype">int</span> mx)
00490 {
00491 d_maxMinor = qwtMin(qwtMax(mx,0), 100);
00492 <a class="code" href="class_qwt_auto_scale.html#a24">build</a>();
00493 }
00494
00495
<a name="l00510"></a><a class="code" href="class_qwt_auto_scale.html#b2">00510</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#b2">QwtAutoScale::setRange</a>(<span class="keywordtype">double</span> x1, <span class="keywordtype">double</span> x2)
00511 {
00512 <span class="keywordtype">double</span> minval = qwtMin(x1, x2);
00513 <span class="keywordtype">double</span> maxval = qwtMax(x1, x2);
00514
00515 <span class="keywordflow">if</span> (d_scaleOpt & Logarithmic)
00516 {
00517 minval = qwtMin(qwtMax(minval, <a class="code" href="qwt__math_8h.html#a4">LOG_MIN</a>), <a class="code" href="qwt__math_8h.html#a5">LOG_MAX</a>);
00518 maxval = qwtMin(qwtMax(maxval, <a class="code" href="qwt__math_8h.html#a4">LOG_MIN</a>), <a class="code" href="qwt__math_8h.html#a5">LOG_MAX</a>);
00519 }
00520
00521 <span class="keywordtype">double</span> delta = maxval - minval;
00522
00523 <span class="keywordflow">if</span> (delta <= 0.0) <span class="comment">// all values are equal</span>
00524 {
00525 <span class="keywordflow">if</span> (minval > 0)
00526 {
00527 d_scaleMin = minval * 0.5;
00528 d_scaleMax = maxval * 1.5;
00529 }
00530 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (minval < 0)
00531 {
00532 d_scaleMin = minval * 1.5;
00533 d_scaleMax = maxval * 0.5;
00534 }
00535 <span class="keywordflow">else</span> <span class="comment">// all values are zero</span>
00536 {
00537 d_scaleMin = -0.5;
00538 d_scaleMax = 0.5;
00539 }
00540
00541 delta = d_scaleMax - d_scaleMin;
00542 }
00543 <span class="keywordflow">else</span> <span class="comment">// the normal case</span>
00544 {
00545 d_scaleMin = minval;
00546 d_scaleMax = maxval;
00547 }
00548 }
00549
<a name="l00576"></a><a class="code" href="class_qwt_auto_scale.html#a19">00576</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a19">QwtAutoScale::setScale</a>(<span class="keywordtype">double</span> xmin, <span class="keywordtype">double</span> xmax, <span class="keywordtype">double</span> step)
00577 {
00578 <span class="comment">// turn auto-scaling off and set the</span>
00579 <span class="comment">// scale limits to the desired values</span>
00580 <a class="code" href="class_qwt_auto_scale.html#b2">setRange</a>(xmin,xmax);
00581 d_autoScale = FALSE;
00582 d_step = step;
00583
00584 <a class="code" href="class_qwt_auto_scale.html#a24">build</a>(); <span class="comment">// rebuild the scale</span>
00585 }
00586
00587
<a name="l00649"></a><a class="code" href="class_qwt_auto_scale.html#a7">00649</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a7">QwtAutoScale::setOptions</a>(<span class="keywordtype">int</span> opt)
00650 {
00651 d_scaleOpt = opt;
00652 <a class="code" href="class_qwt_auto_scale.html#a24">build</a>();
00653 }
00654
00655
<a name="l00670"></a><a class="code" href="class_qwt_auto_scale.html#a14">00670</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a14">QwtAutoScale::setReference</a>(<span class="keywordtype">double</span> r)
00671 {
00672 d_ref = r;
00673
00674 <span class="keywordflow">if</span> (r > <a class="code" href="qwt__math_8h.html#a4">LOG_MIN</a> / 2)
00675 d_lref = qwtMin(r, <a class="code" href="qwt__math_8h.html#a5">LOG_MAX</a> / 2);
00676 <span class="keywordflow">else</span>
00677 d_lref = 1.0;
00678
00679 <a class="code" href="class_qwt_auto_scale.html#a24">build</a>();
00680 }
00681
<a name="l00686"></a><a class="code" href="class_qwt_auto_scale.html#a15">00686</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_auto_scale.html#a15">QwtAutoScale::reference</a>()<span class="keyword"> const </span>
00687 <span class="keyword"></span>{
00688 <span class="keywordflow">return</span> d_ref;
00689 }
00690
00691
<a name="l00697"></a><a class="code" href="class_qwt_auto_scale.html#a8">00697</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_auto_scale.html#a8">QwtAutoScale::option</a>(<span class="keywordtype">int</span> opt)<span class="keyword"> const</span>
00698 <span class="keyword"></span>{
00699 <span class="keywordflow">return</span> bool(d_scaleOpt & opt);
00700 }
00701
<a name="l00707"></a><a class="code" href="class_qwt_auto_scale.html#a9">00707</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_auto_scale.html#a9">QwtAutoScale::options</a>()<span class="keyword"> const </span>
00708 <span class="keyword"></span>{
00709 <span class="keywordflow">return</span> d_scaleOpt;
00710 }
00711
<a name="l00720"></a><a class="code" href="class_qwt_auto_scale.html#a20">00720</a> <span class="keyword">const</span> <a class="code" href="class_qwt_scale_div.html">QwtScaleDiv</a> &<a class="code" href="class_qwt_auto_scale.html#a20">QwtAutoScale::scaleDiv</a>()<span class="keyword"> const </span>
00721 <span class="keyword"></span>{
00722 <span class="keywordflow">return</span> d_scldiv;
00723 }
00724
<a name="l00730"></a><a class="code" href="class_qwt_auto_scale.html#a4">00730</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_auto_scale.html#a4">QwtAutoScale::setAutoRebuild</a>(<span class="keywordtype">bool</span> tf)
00731 {
00732 d_autoRebuild = tf;
00733 }
00734
<a name="l00739"></a><a class="code" href="class_qwt_auto_scale.html#a5">00739</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_auto_scale.html#a5">QwtAutoScale::autoRebuild</a>()<span class="keyword"> const</span>
00740 <span class="keyword"></span>{
00741 <span class="keywordflow">return</span> d_autoRebuild;
00742 }
</div></pre><hr size="1"><address style="align: right;"><small>Generated on Tue Nov 16 21:12:20 2004 for Qwt User's Guide by
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