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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Qwt User's Guide: qwt_plot_layout.cpp Source File</title>
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<h1>qwt_plot_layout.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 <qlabel.h></span>
00013 <span class="preprocessor">#include "qwt_rect.h"</span>
00014 <span class="preprocessor">#include "qwt_text.h"</span>
00015 <span class="preprocessor">#include "qwt_plot_canvas.h"</span>
00016 <span class="preprocessor">#include "qwt_scale.h"</span>
00017 <span class="preprocessor">#include "qwt_legend.h"</span>
00018 <span class="preprocessor">#include "qwt_plot_layout.h"</span>
00019
00020 <span class="keyword">class </span>QwtPlotLayoutData
00021 {
00022 <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="class_qwt_plot_layout.html">QwtPlotLayout</a>;
00023
00024 <span class="keyword">protected</span>:
00025 QwtPlotLayoutData();
00026 ~QwtPlotLayoutData();
00027
00028 <span class="keywordtype">void</span> init(<span class="keyword">const</span> <a class="code" href="class_qwt_plot.html">QwtPlot</a> *, <span class="keyword">const</span> QRect &rect);
00029
00030 <span class="keyword">struct </span>t_legendData
00031 {
00032 <span class="keywordtype">int</span> frameWidth;
00033 <span class="keywordtype">int</span> vScrollBarWidth;
00034 <span class="keywordtype">int</span> hScrollBarHeight;
00035 QSize hint;
00036 } legend;
00037
00038 <span class="keyword">struct </span>t_titleData
00039 {
00040 <span class="keyword">const</span> <a class="code" href="class_qwt_text.html">QwtText</a> *text;
00041 <span class="keywordtype">int</span> frameWidth;
00042 } title;
00043
00044 <span class="keyword">struct </span>t_scaleData
00045 {
00046 <span class="keywordtype">bool</span> isEnabled;
00047 <span class="keyword">const</span> <a class="code" href="class_qwt_scale.html">QwtScale</a> *scale;
00048 QFont scaleFont;
00049 <span class="keywordtype">int</span> start;
00050 <span class="keywordtype">int</span> end;
00051 <span class="keywordtype">int</span> baseLineOffset;
00052 <span class="keywordtype">int</span> tickOffset;
00053 <span class="keywordtype">int</span> dimWithoutTitle;
00054 } scale[QwtPlot::axisCnt];
00055
00056 <span class="keyword">struct </span>t_canvasData
00057 {
00058 <span class="keywordtype">int</span> frameWidth;
00059 } canvas;
00060 };
00061
<a name="l00066"></a><a class="code" href="class_qwt_plot_layout.html#a0">00066</a> <a class="code" href="class_qwt_plot_layout.html#a0">QwtPlotLayout::QwtPlotLayout</a>():
00067 d_margin(0),
00068 d_spacing(5),
00069 d_alignCanvasToScales(FALSE)
00070 {
00071 <a class="code" href="class_qwt_plot_layout.html#a10">setLegendPosition</a>(QwtPlot::Bottom);
00072 <a class="code" href="class_qwt_plot_layout.html#a4">setCanvasMargin</a>(4);
00073 d_layoutData = <span class="keyword">new</span> QwtPlotLayoutData;
00074
00075 <a class="code" href="class_qwt_plot_layout.html#a19">invalidate</a>();
00076 }
00077
<a name="l00079"></a><a class="code" href="class_qwt_plot_layout.html#a1">00079</a> <a class="code" href="class_qwt_plot_layout.html#a1">QwtPlotLayout::~QwtPlotLayout</a>()
00080 {
00081 <span class="keyword">delete</span> d_layoutData;
00082 }
00083
<a name="l00093"></a><a class="code" href="class_qwt_plot_layout.html#a2">00093</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_layout.html#a2">QwtPlotLayout::setMargin</a>(<span class="keywordtype">int</span> margin)
00094 {
00095 <span class="keywordflow">if</span> ( margin < 0 )
00096 margin = 0;
00097 d_margin = margin;
00098 }
00099
<a name="l00106"></a><a class="code" href="class_qwt_plot_layout.html#a3">00106</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_plot_layout.html#a3">QwtPlotLayout::margin</a>()<span class="keyword"> const</span>
00107 <span class="keyword"></span>{
00108 <span class="keywordflow">return</span> d_margin;
00109 }
00110
<a name="l00124"></a><a class="code" href="class_qwt_plot_layout.html#a4">00124</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_layout.html#a4">QwtPlotLayout::setCanvasMargin</a>(<span class="keywordtype">int</span> margin, <span class="keywordtype">int</span> axis)
00125 {
00126 <span class="keywordflow">if</span> ( margin < -1 )
00127 margin = -1;
00128
00129 <span class="keywordflow">if</span> ( axis == -1 )
00130 {
00131 <span class="keywordflow">for</span> (axis = 0; axis < QwtPlot::axisCnt; axis++)
00132 d_canvasMargin[axis] = margin;
00133 }
00134 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( axis >= 0 || axis < QwtPlot::axisCnt )
00135 d_canvasMargin[axis] = margin;
00136 }
00137
<a name="l00143"></a><a class="code" href="class_qwt_plot_layout.html#a5">00143</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_plot_layout.html#a5">QwtPlotLayout::canvasMargin</a>(<span class="keywordtype">int</span> axis)<span class="keyword"> const</span>
00144 <span class="keyword"></span>{
00145 <span class="keywordflow">if</span> ( axis < 0 || axis >= QwtPlot::axisCnt )
00146 <span class="keywordflow">return</span> 0;
00147
00148 <span class="keywordflow">return</span> d_canvasMargin[axis];
00149 }
00150
00151
<a name="l00165"></a><a class="code" href="class_qwt_plot_layout.html#a6">00165</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_layout.html#a6">QwtPlotLayout::setAlignCanvasToScales</a>(<span class="keywordtype">bool</span> alignCanvasToScales)
00166 {
00167 d_alignCanvasToScales = alignCanvasToScales;
00168 }
00169
<a name="l00180"></a><a class="code" href="class_qwt_plot_layout.html#a7">00180</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_plot_layout.html#a7">QwtPlotLayout::alignCanvasToScales</a>()<span class="keyword"> const</span>
00181 <span class="keyword"></span>{
00182 <span class="keywordflow">return</span> d_alignCanvasToScales;
00183 }
00184
<a name="l00193"></a><a class="code" href="class_qwt_plot_layout.html#a8">00193</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_layout.html#a8">QwtPlotLayout::setSpacing</a>(<span class="keywordtype">int</span> spacing)
00194 {
00195 d_spacing = QMAX(0, spacing);
00196 }
00197
<a name="l00202"></a><a class="code" href="class_qwt_plot_layout.html#a9">00202</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_plot_layout.html#a9">QwtPlotLayout::spacing</a>()<span class="keyword"> const</span>
00203 <span class="keyword"></span>{
00204 <span class="keywordflow">return</span> d_spacing;
00205 }
00206
<a name="l00221"></a><a class="code" href="class_qwt_plot_layout.html#a10">00221</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_layout.html#a10">QwtPlotLayout::setLegendPosition</a>(QwtPlot::Position pos, <span class="keywordtype">double</span> ratio)
00222 {
00223 <span class="keywordflow">if</span> ( ratio > 1.0 )
00224 ratio = 1.0;
00225
00226 <span class="keywordflow">switch</span>(pos)
00227 {
00228 <span class="keywordflow">case</span> QwtPlot::Top:
00229 <span class="keywordflow">case</span> QwtPlot::Bottom:
00230 <span class="keywordflow">if</span> ( ratio <= 0.0 )
00231 ratio = 0.33;
00232 d_legendRatio = ratio;
00233 d_legendPos = pos;
00234 <span class="keywordflow">break</span>;
00235 <span class="keywordflow">case</span> QwtPlot::Left:
00236 <span class="keywordflow">case</span> QwtPlot::Right:
00237 <span class="keywordflow">if</span> ( ratio <= 0.0 )
00238 ratio = 0.5;
00239 d_legendRatio = ratio;
00240 d_legendPos = pos;
00241 <span class="keywordflow">break</span>;
00242 <span class="keywordflow">default</span>:
00243 <span class="keywordflow">break</span>;
00244 }
00245 }
00246
<a name="l00255"></a><a class="code" href="class_qwt_plot_layout.html#a11">00255</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_layout.html#a10">QwtPlotLayout::setLegendPosition</a>(QwtPlot::Position pos)
00256 {
00257 <a class="code" href="class_qwt_plot_layout.html#a10">setLegendPosition</a>(pos, 0.0);
00258 }
00259
<a name="l00266"></a><a class="code" href="class_qwt_plot_layout.html#a12">00266</a> QwtPlot::Position <a class="code" href="class_qwt_plot_layout.html#a12">QwtPlotLayout::legendPosition</a>()<span class="keyword"> const</span>
00267 <span class="keyword"></span>{
00268 <span class="keywordflow">return</span> d_legendPos;
00269 }
00270
00271 <span class="preprocessor">#ifndef QWT_NO_COMPAT</span>
00272 <span class="preprocessor"></span>
<a name="l00288"></a><a class="code" href="class_qwt_plot_layout.html#a15">00288</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_layout.html#a15">QwtPlotLayout::setLegendPos</a>(<span class="keywordtype">int</span> pos, <span class="keywordtype">double</span> ratio)
00289 {
00290 <a class="code" href="class_qwt_plot_layout.html#a10">setLegendPosition</a>(QwtPlot::Position(pos), ratio);
00291 }
00292
<a name="l00300"></a><a class="code" href="class_qwt_plot_layout.html#a16">00300</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_plot_layout.html#a16">QwtPlotLayout::legendPos</a>()<span class="keyword"> const</span>
00301 <span class="keyword"></span>{
00302 <span class="keywordflow">return</span> d_legendPos;
00303 }
00304
00305 <span class="preprocessor">#endif // !QWT_NO_COMPAT</span>
00306 <span class="preprocessor"></span>
<a name="l00318"></a><a class="code" href="class_qwt_plot_layout.html#a13">00318</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_layout.html#a13">QwtPlotLayout::setLegendRatio</a>(<span class="keywordtype">double</span> ratio)
00319 {
00320 <a class="code" href="class_qwt_plot_layout.html#a10">setLegendPosition</a>(<a class="code" href="class_qwt_plot_layout.html#a12">legendPosition</a>(), ratio);
00321 }
00322
<a name="l00328"></a><a class="code" href="class_qwt_plot_layout.html#a14">00328</a> <span class="keywordtype">double</span> <a class="code" href="class_qwt_plot_layout.html#a14">QwtPlotLayout::legendRatio</a>()<span class="keyword"> const</span>
00329 <span class="keyword"></span>{
00330 <span class="keywordflow">return</span> d_legendRatio;
00331 }
00332
<a name="l00338"></a><a class="code" href="class_qwt_plot_layout.html#a20">00338</a> <span class="keyword">const</span> QRect &<a class="code" href="class_qwt_plot_layout.html#a20">QwtPlotLayout::titleRect</a>()<span class="keyword"> const</span>
00339 <span class="keyword"></span>{
00340 <span class="keywordflow">return</span> d_titleRect;
00341 }
00342
<a name="l00348"></a><a class="code" href="class_qwt_plot_layout.html#a21">00348</a> <span class="keyword">const</span> QRect &<a class="code" href="class_qwt_plot_layout.html#a21">QwtPlotLayout::legendRect</a>()<span class="keyword"> const</span>
00349 <span class="keyword"></span>{
00350 <span class="keywordflow">return</span> d_legendRect;
00351 }
00352
<a name="l00359"></a><a class="code" href="class_qwt_plot_layout.html#a22">00359</a> <span class="keyword">const</span> QRect &<a class="code" href="class_qwt_plot_layout.html#a22">QwtPlotLayout::scaleRect</a>(<span class="keywordtype">int</span> axis)<span class="keyword"> const</span>
00360 <span class="keyword"></span>{
00361 <span class="keywordflow">if</span> ( axis < 0 || axis >= QwtPlot::axisCnt )
00362 {
00363 <span class="keyword">static</span> QRect dummyRect;
00364 <span class="keywordflow">return</span> dummyRect;
00365 }
00366 <span class="keywordflow">return</span> d_scaleRect[axis];
00367 }
00368
<a name="l00374"></a><a class="code" href="class_qwt_plot_layout.html#a23">00374</a> <span class="keyword">const</span> QRect &<a class="code" href="class_qwt_plot_layout.html#a23">QwtPlotLayout::canvasRect</a>()<span class="keyword"> const</span>
00375 <span class="keyword"></span>{
00376 <span class="keywordflow">return</span> d_canvasRect;
00377 }
00378
<a name="l00383"></a><a class="code" href="class_qwt_plot_layout.html#a19">00383</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_layout.html#a19">QwtPlotLayout::invalidate</a>()
00384 {
00385 d_titleRect = d_legendRect = d_canvasRect = QRect();
00386 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> axis = 0; axis < QwtPlot::axisCnt; axis++ )
00387 d_scaleRect[axis] = QRect();
00388 }
00389
<a name="l00395"></a><a class="code" href="class_qwt_plot_layout.html#a17">00395</a> QSize <a class="code" href="class_qwt_plot_layout.html#a17">QwtPlotLayout::minimumSizeHint</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_plot.html">QwtPlot</a> *plot)<span class="keyword"> const</span>
00396 <span class="keyword"></span>{
00397 <span class="keyword">class </span>ScaleData
00398 {
00399 <span class="keyword">public</span>:
00400 ScaleData()
00401 {
00402 w = h = minLeft = minRight = tickOffset = 0;
00403 }
00404
00405 <span class="keywordtype">int</span> w;
00406 <span class="keywordtype">int</span> h;
00407 <span class="keywordtype">int</span> minLeft;
00408 <span class="keywordtype">int</span> minRight;
00409 <span class="keywordtype">int</span> tickOffset;
00410 } scaleData[QwtPlot::axisCnt];
00411
00412 <span class="keywordtype">int</span> canvasBorder[QwtPlot::axisCnt];
00413
00414 <span class="keywordtype">int</span> axis;
00415 <span class="keywordflow">for</span> ( axis = 0; axis < QwtPlot::axisCnt; axis++ )
00416 {
00417 <span class="keyword">const</span> <a class="code" href="class_qwt_scale.html">QwtScale</a> *scl = plot-><a class="code" href="class_qwt_plot.html#a109">axis</a>(axis);
00418 <span class="keywordflow">if</span> ( scl )
00419 {
00420 ScaleData &sd = scaleData[axis];
00421
00422 <span class="keyword">const</span> QSize hint = scl-><a class="code" href="class_qwt_scale.html#a27">minimumSizeHint</a>();
00423 sd.w = hint.width();
00424 sd.h = hint.height();
00425 scl-><a class="code" href="class_qwt_scale.html#a14">minBorderDist</a>(sd.minLeft, sd.minRight);
00426 sd.tickOffset = scl-><a class="code" href="class_qwt_scale.html#a16">baseLineDist</a>() +
00427 scl-><a class="code" href="class_qwt_scale.html#a21">scaleDraw</a>()-><a class="code" href="class_qwt_scale_draw.html#a28">majTickLength</a>();
00428 }
00429
00430 canvasBorder[axis] = plot-><a class="code" href="class_qwt_plot.html#a31">canvas</a>()->frameWidth() +
00431 d_canvasMargin[axis] + 1;
00432
00433 }
00434
00435
00436 <span class="keywordflow">for</span> ( axis = 0; axis < QwtPlot::axisCnt; axis++ )
00437 {
00438 ScaleData &sd = scaleData[axis];
00439 <span class="keywordflow">if</span> ( sd.w && (axis == QwtPlot::xBottom || axis == QwtPlot::xTop) )
00440 {
00441 <span class="keywordflow">if</span> ( (sd.minLeft > canvasBorder[QwtPlot::yLeft])
00442 && scaleData[QwtPlot::yLeft].w )
00443 {
00444 <span class="keywordtype">int</span> shiftLeft = sd.minLeft - canvasBorder[QwtPlot::yLeft];
00445 <span class="keywordflow">if</span> ( shiftLeft > scaleData[QwtPlot::yLeft].w )
00446 shiftLeft = scaleData[QwtPlot::yLeft].w;
00447
00448 sd.w -= shiftLeft;
00449 }
00450 <span class="keywordflow">if</span> ( (sd.minRight > canvasBorder[QwtPlot::yRight])
00451 && scaleData[QwtPlot::yRight].w )
00452 {
00453 <span class="keywordtype">int</span> shiftRight = sd.minRight - canvasBorder[QwtPlot::yRight];
00454 <span class="keywordflow">if</span> ( shiftRight > scaleData[QwtPlot::yRight].w )
00455 shiftRight = scaleData[QwtPlot::yRight].w;
00456
00457 sd.w -= shiftRight;
00458 }
00459 }
00460
00461 <span class="keywordflow">if</span> ( sd.h && (axis == QwtPlot::yLeft || axis == QwtPlot::yRight) )
00462 {
00463 <span class="keywordflow">if</span> ( (sd.minLeft > canvasBorder[QwtPlot::xBottom]) &&
00464 scaleData[QwtPlot::xBottom].h )
00465 {
00466 <span class="keywordtype">int</span> shiftBottom = sd.minLeft - canvasBorder[QwtPlot::xBottom];
00467 <span class="keywordflow">if</span> ( shiftBottom > scaleData[QwtPlot::xBottom].tickOffset )
00468 shiftBottom = scaleData[QwtPlot::xBottom].tickOffset;
00469
00470 sd.h -= shiftBottom;
00471 }
00472 <span class="keywordflow">if</span> ( (sd.minLeft > canvasBorder[QwtPlot::xTop]) &&
00473 scaleData[QwtPlot::xTop].h )
00474 {
00475 <span class="keywordtype">int</span> shiftTop = sd.minRight - canvasBorder[QwtPlot::xTop];
00476 <span class="keywordflow">if</span> ( shiftTop > scaleData[QwtPlot::xTop].tickOffset )
00477 shiftTop = scaleData[QwtPlot::xTop].tickOffset;
00478
00479 sd.h -= shiftTop;
00480 }
00481 }
00482 }
00483
00484 <span class="keyword">const</span> <a class="code" href="class_qwt_plot_canvas.html">QwtPlotCanvas</a> *canvas = plot-><a class="code" href="class_qwt_plot.html#a31">canvas</a>();
00485
00486 <span class="keywordtype">int</span> w = scaleData[QwtPlot::yLeft].w + scaleData[QwtPlot::yRight].w
00487 + QMAX(scaleData[QwtPlot::xBottom].w, scaleData[QwtPlot::xTop].w)
00488 + 2 * (canvas->frameWidth() + 1);
00489 <span class="keywordtype">int</span> h = scaleData[QwtPlot::xBottom].h + scaleData[QwtPlot::xTop].h
00490 + QMAX(scaleData[QwtPlot::yLeft].h, scaleData[QwtPlot::yRight].h)
00491 + 2 * (canvas->frameWidth() + 1);
00492
00493 <span class="keyword">const</span> QLabel *title = plot-><a class="code" href="class_qwt_plot.html#a29">titleLabel</a>();
00494 <span class="keywordflow">if</span> (title && !title->text().isEmpty())
00495 {
00496 <span class="comment">// If only QwtPlot::yLeft or QwtPlot::yRight is showing, </span>
00497 <span class="comment">// we center on the plot canvas.</span>
00498 <span class="keyword">const</span> <span class="keywordtype">bool</span> centerOnCanvas = plot-><a class="code" href="class_qwt_plot.html#a109">axis</a>(QwtPlot::yLeft) == 0
00499 || plot-><a class="code" href="class_qwt_plot.html#a109">axis</a>(QwtPlot::yRight) == 0;
00500
00501 <span class="keywordtype">int</span> titleW = w;
00502 <span class="keywordflow">if</span> ( centerOnCanvas )
00503 {
00504 titleW -= scaleData[QwtPlot::yLeft].w
00505 + scaleData[QwtPlot::yRight].w;
00506 }
00507
00508 <span class="keywordtype">int</span> titleH = title->heightForWidth(titleW);
00509 <span class="keywordflow">if</span> ( titleH > titleW ) <span class="comment">// Compensate for a long title</span>
00510 {
00511 w = titleW = titleH;
00512 <span class="keywordflow">if</span> ( centerOnCanvas )
00513 {
00514 w += scaleData[QwtPlot::yLeft].w
00515 + scaleData[QwtPlot::yRight].w;
00516 }
00517
00518 titleH = title->heightForWidth(titleW);
00519 }
00520 h += titleH + d_spacing;
00521 }
00522
00523 <span class="comment">// Compute the legend contribution</span>
00524
00525 <span class="keyword">const</span> <a class="code" href="class_qwt_legend.html">QwtLegend</a> *legend = plot-><a class="code" href="class_qwt_plot.html#a170">legend</a>();
00526 <span class="keywordflow">if</span> ( legend && !legend-><a class="code" href="class_qwt_legend.html#a15">isEmpty</a>() )
00527 {
00528 <span class="keywordflow">if</span> ( d_legendPos == QwtPlot::Left || d_legendPos == QwtPlot::Right )
00529 {
00530 <span class="keywordtype">int</span> legendW = legend-><a class="code" href="class_qwt_legend.html#a18">sizeHint</a>().width();
00531 <span class="keywordtype">int</span> legendH = legend-><a class="code" href="class_qwt_legend.html#a19">heightForWidth</a>(legendW);
00532
00533 <span class="keywordflow">if</span> ( legend->frameWidth() > 0 )
00534 w += d_spacing;
00535
00536 <span class="keywordflow">if</span> ( legendH > h )
00537 legendW += legend->verticalScrollBar()-><a class="code" href="class_qwt_legend.html#a18">sizeHint</a>().height();
00538
00539 <span class="keywordflow">if</span> ( d_legendRatio < 1.0 )
00540 legendW = QMIN(legendW, <span class="keywordtype">int</span>(w / (1.0 - d_legendRatio)));
00541
00542 w += legendW;
00543 }
00544 <span class="keywordflow">else</span> <span class="comment">// QwtPlot::Top, QwtPlot::Bottom</span>
00545 {
00546 <span class="keywordtype">int</span> legendW = QMIN(legend-><a class="code" href="class_qwt_legend.html#a18">sizeHint</a>().width(), w);
00547 <span class="keywordtype">int</span> legendH = legend-><a class="code" href="class_qwt_legend.html#a19">heightForWidth</a>(legendW);
00548
00549 <span class="keywordflow">if</span> ( legend->frameWidth() > 0 )
00550 h += d_spacing;
00551
00552 <span class="keywordflow">if</span> ( d_legendRatio < 1.0 )
00553 legendH = QMIN(legendH, <span class="keywordtype">int</span>(h / (1.0 - d_legendRatio)));
00554
00555 h += legendH;
00556 }
00557 }
00558
00559 w += 2 * d_margin;
00560 h += 2 * d_margin;
00561
00562 <span class="keywordflow">return</span> QSize( w, h );
00563 }
00564
<a name="l00572"></a><a class="code" href="class_qwt_plot_layout.html#b0">00572</a> QRect <a class="code" href="class_qwt_plot_layout.html#b0">QwtPlotLayout::layoutLegend</a>(<span class="keywordtype">int</span> options,
00573 <span class="keyword">const</span> QRect &rect)<span class="keyword"> const</span>
00574 <span class="keyword"></span>{
00575 <span class="keyword">const</span> QSize hint(d_layoutData->legend.hint);
00576
00577 <span class="keywordtype">int</span> dim;
00578 <span class="keywordflow">if</span> ( d_legendPos == QwtPlot::Left || d_legendPos == QwtPlot::Right )
00579 {
00580 <span class="comment">// We don't allow vertical legends to take more than</span>
00581 <span class="comment">// half of the available space.</span>
00582
00583 dim = QMIN(hint.width(), int(rect.width() * d_legendRatio));
00584
00585 <span class="keywordflow">if</span> ( !(options & IgnoreScrollbars) )
00586 {
00587 <span class="keywordflow">if</span> ( hint.height() > rect.height() )
00588 {
00589 <span class="comment">// The legend will need additional</span>
00590 <span class="comment">// space for the vertical scrollbar. </span>
00591
00592 dim += d_layoutData->legend.vScrollBarWidth;
00593 }
00594 }
00595 }
00596 <span class="keywordflow">else</span>
00597 {
00598 dim = QMIN(hint.height(), int(rect.height() * d_legendRatio));
00599 dim = QMAX(dim, d_layoutData->legend.hScrollBarHeight);
00600 }
00601
00602 QRect <a class="code" href="class_qwt_plot_layout.html#a21">legendRect</a> = rect;
00603 <span class="keywordflow">switch</span>(d_legendPos)
00604 {
00605 <span class="keywordflow">case</span> QwtPlot::Left:
00606 legendRect.setWidth(dim);
00607 <span class="keywordflow">break</span>;
00608 <span class="keywordflow">case</span> QwtPlot::Right:
00609 legendRect.setX(rect.right() - dim + 1);
00610 legendRect.setWidth(dim);
00611 <span class="keywordflow">break</span>;
00612 <span class="keywordflow">case</span> QwtPlot::Top:
00613 legendRect.setHeight(dim);
00614 <span class="keywordflow">break</span>;
00615 <span class="keywordflow">case</span> QwtPlot::Bottom:
00616 legendRect.setY(rect.bottom() - dim + 1);
00617 legendRect.setHeight(dim);
00618 <span class="keywordflow">break</span>;
00619 }
00620
00621 <span class="keywordflow">return</span> legendRect;
00622 }
00623
<a name="l00630"></a><a class="code" href="class_qwt_plot_layout.html#b1">00630</a> QRect <a class="code" href="class_qwt_plot_layout.html#b1">QwtPlotLayout::alignLegend</a>(<span class="keyword">const</span> QRect &canvasRect,
00631 <span class="keyword">const</span> QRect &legendRect)<span class="keyword"> const</span>
00632 <span class="keyword"></span>{
00633 QRect alignedRect = legendRect;
00634
00635 <span class="keywordflow">if</span> ( d_legendPos == QwtPlot::Bottom || d_legendPos == QwtPlot::Top )
00636 {
00637 <span class="keywordflow">if</span> ( d_layoutData->legend.hint.width() < canvasRect.width() )
00638 {
00639 alignedRect.setX(canvasRect.x());
00640 alignedRect.setWidth(canvasRect.width());
00641 }
00642 }
00643 <span class="keywordflow">else</span>
00644 {
00645 <span class="keywordflow">if</span> ( d_layoutData->legend.hint.height() < canvasRect.height() )
00646 {
00647 alignedRect.setY(canvasRect.y());
00648 alignedRect.setHeight(canvasRect.height());
00649 }
00650 }
00651
00652 <span class="keywordflow">return</span> alignedRect;
00653 }
00654
<a name="l00664"></a><a class="code" href="class_qwt_plot_layout.html#b2">00664</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_layout.html#b2">QwtPlotLayout::expandLineBreaks</a>(<span class="keywordtype">int</span> options, <span class="keyword">const</span> QRect &rect,
00665 <span class="keywordtype">int</span> &dimTitle, <span class="keywordtype">int</span> dimAxis[QwtPlot::axisCnt])<span class="keyword"> const</span>
00666 <span class="keyword"></span>{
00667 dimTitle = 0;
00668 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i < QwtPlot::axisCnt; i++ )
00669 dimAxis[i] = 0;
00670
00671 <span class="keywordtype">bool</span> done = FALSE;
00672 <span class="keywordflow">while</span> (!done)
00673 {
00674 done = TRUE;
00675
00676 <span class="comment">// the size for the 4 axis depend on each other. Expanding</span>
00677 <span class="comment">// the height of a horizontal axis will shrink the height</span>
00678 <span class="comment">// for the vertical axis, shrinking the height of a vertical</span>
00679 <span class="comment">// axis will result in a line break what will expand the</span>
00680 <span class="comment">// width and results in shrinking the width of a horizontal</span>
00681 <span class="comment">// axis what might result in a line break of a horizontal</span>
00682 <span class="comment">// axis ... . So we loop as long until no size changes.</span>
00683
00684 <span class="keywordflow">if</span> ( d_layoutData->title.text)
00685 {
00686 <span class="keywordtype">int</span> w = rect.width();
00687
00688 <span class="keywordflow">if</span> ( d_layoutData->scale[QwtPlot::yLeft].isEnabled
00689 != d_layoutData->scale[QwtPlot::yRight].isEnabled )
00690 {
00691 <span class="comment">// center to the canvas</span>
00692 w -= dimAxis[QwtPlot::yLeft] + dimAxis[QwtPlot::yRight];
00693 }
00694
00695 <span class="keywordtype">int</span> d = d_layoutData->title.text->heightForWidth(w);
00696 <span class="keywordflow">if</span> ( !(options & IgnoreFrames) )
00697 d += 2 * d_layoutData->title.frameWidth;
00698
00699 <span class="keywordflow">if</span> ( d > dimTitle )
00700 {
00701 dimTitle = d;
00702 done = FALSE;
00703 }
00704 }
00705
00706 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> axis = 0; axis < QwtPlot::axisCnt; axis++ )
00707 {
00708 <span class="keywordtype">int</span> backboneOffset = d_canvasMargin[axis];
00709 <span class="keywordflow">if</span> ( !(options & IgnoreFrames) )
00710 backboneOffset += d_layoutData->canvas.frameWidth;
00711
00712 <span class="keyword">const</span> <span class="keyword">struct </span>QwtPlotLayoutData::t_scaleData &scaleData =
00713 d_layoutData->scale[axis];
00714
00715 <span class="keywordflow">if</span> (scaleData.isEnabled)
00716 {
00717 <span class="keywordtype">int</span> length;
00718 <span class="keywordflow">if</span> ( axis == QwtPlot::xTop || axis == QwtPlot::xBottom )
00719 {
00720 length = rect.width() - dimAxis[QwtPlot::yLeft]
00721 - dimAxis[QwtPlot::yRight];
00722 length += QMIN(dimAxis[QwtPlot::yLeft],
00723 scaleData.start - backboneOffset);
00724 length += QMIN(dimAxis[QwtPlot::yRight],
00725 scaleData.end - backboneOffset);
00726 }
00727 <span class="keywordflow">else</span> <span class="comment">// QwtPlot::yLeft, QwtPlot::yRight</span>
00728 {
00729 length = rect.height() - dimAxis[QwtPlot::xTop]
00730 - dimAxis[QwtPlot::xBottom];
00731
00732 <span class="keywordflow">if</span> ( dimAxis[QwtPlot::xBottom] > 0 )
00733 {
00734 length += QMIN(
00735 d_layoutData->scale[QwtPlot::xBottom].tickOffset,
00736 scaleData.start - backboneOffset);
00737 }
00738 <span class="keywordflow">if</span> ( dimAxis[QwtPlot::xTop] > 0 )
00739 {
00740 length += QMIN(
00741 d_layoutData->scale[QwtPlot::xTop].tickOffset,
00742 scaleData.end - backboneOffset);
00743 }
00744
00745 <span class="keywordflow">if</span> ( dimTitle > 0 )
00746 length -= dimTitle + d_spacing;
00747 }
00748
00749 <span class="keywordtype">int</span> d = scaleData.dimWithoutTitle;
00750 <span class="keywordflow">if</span> ( !scaleData.scale->title().isEmpty() )
00751 {
00752 d += scaleData.scale->titleHeightForWidth(length);
00753 }
00754
00755 <span class="keywordflow">if</span> ( options & AlignScales )
00756 d -= scaleData.baseLineOffset;
00757
00758 <span class="keywordflow">if</span> ( d > dimAxis[axis] )
00759 {
00760 dimAxis[axis] = d;
00761 done = FALSE;
00762 }
00763 }
00764 }
00765 }
00766 }
00767
<a name="l00773"></a><a class="code" href="class_qwt_plot_layout.html#b3">00773</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_layout.html#b3">QwtPlotLayout::alignScales</a>(<span class="keywordtype">int</span> options,
00774 QRect &canvasRect, QRect scaleRect[QwtPlot::axisCnt])<span class="keyword"> const</span>
00775 <span class="keyword"></span>{
00776 <span class="keywordtype">int</span> axis;
00777
00778 <span class="keywordtype">int</span> backboneOffset[QwtPlot::axisCnt];
00779 <span class="keywordflow">for</span> (axis = 0; axis < QwtPlot::axisCnt; axis++ )
00780 {
00781 backboneOffset[axis] = 0;
00782 <span class="keywordflow">if</span> ( !d_alignCanvasToScales )
00783 backboneOffset[axis] += d_canvasMargin[axis];
00784 <span class="keywordflow">if</span> ( !(options & IgnoreFrames) )
00785 backboneOffset[axis] += d_layoutData->canvas.frameWidth;
00786 }
00787
00788 <span class="keywordflow">for</span> (axis = 0; axis < QwtPlot::axisCnt; axis++ )
00789 {
00790 <span class="keywordflow">if</span> ( !<a class="code" href="class_qwt_plot_layout.html#a22">scaleRect</a>[axis].isValid() )
00791 <span class="keywordflow">continue</span>;
00792
00793 <span class="keyword">const</span> <span class="keywordtype">int</span> startDist = d_layoutData->scale[axis].start;
00794 <span class="keyword">const</span> <span class="keywordtype">int</span> endDist = d_layoutData->scale[axis].end;
00795
00796 QRect &axisRect = <a class="code" href="class_qwt_plot_layout.html#a22">scaleRect</a>[axis];
00797
00798 <span class="keywordflow">if</span> ( axis == QwtPlot::xTop || axis == QwtPlot::xBottom )
00799 {
00800 <span class="keyword">const</span> <span class="keywordtype">int</span> leftOffset = backboneOffset[QwtPlot::yLeft] - startDist;
00801
00802 <span class="keywordflow">if</span> ( scaleRect[QwtPlot::yLeft].isValid() )
00803 {
00804 <span class="keywordtype">int</span> minLeft = scaleRect[QwtPlot::yLeft].left();
00805 <span class="keywordtype">int</span> left = axisRect.left() + leftOffset;
00806 axisRect.setLeft(QMAX(left, minLeft));
00807 }
00808 <span class="keywordflow">else</span>
00809 {
00810 <span class="keywordflow">if</span> ( d_alignCanvasToScales )
00811 {
00812 canvasRect.setLeft(QMAX(canvasRect.left(),
00813 axisRect.left() - leftOffset));
00814 }
00815 <span class="keywordflow">else</span>
00816 {
00817 <span class="keywordflow">if</span> ( leftOffset > 0 )
00818 axisRect.setLeft(axisRect.left() + leftOffset);
00819 }
00820 }
00821
00822 <span class="keyword">const</span> <span class="keywordtype">int</span> rightOffset = backboneOffset[QwtPlot::yRight] - endDist;
00823
00824 <span class="keywordflow">if</span> ( scaleRect[QwtPlot::yRight].isValid() )
00825 {
00826 <span class="keywordtype">int</span> maxRight = scaleRect[QwtPlot::yRight].right();
00827 <span class="keywordtype">int</span> right = axisRect.right() - rightOffset;
00828 axisRect.setRight(QMIN(right, maxRight));
00829 }
00830 <span class="keywordflow">else</span>
00831 {
00832 <span class="keywordflow">if</span> ( d_alignCanvasToScales )
00833 {
00834 canvasRect.setRight( QMIN(canvasRect.right(),
00835 axisRect.right() + rightOffset) );
00836 }
00837 <span class="keywordflow">else</span>
00838 {
00839 <span class="keywordflow">if</span> ( rightOffset > 0 )
00840 axisRect.setRight(axisRect.right() - rightOffset);
00841 }
00842 }
00843 }
00844 <span class="keywordflow">else</span> <span class="comment">// QwtPlot::yLeft, QwtPlot::yRight</span>
00845 {
00846 <span class="keyword">const</span> <span class="keywordtype">int</span> bottomOffset =
00847 backboneOffset[QwtPlot::xBottom] - startDist;
00848
00849 <span class="keywordflow">if</span> ( scaleRect[QwtPlot::xBottom].isValid() )
00850 {
00851 <span class="keywordtype">int</span> maxBottom = scaleRect[QwtPlot::xBottom].top() +
00852 d_layoutData->scale[QwtPlot::xBottom].tickOffset;
00853
00854 <span class="keywordtype">int</span> bottom = axisRect.bottom() - bottomOffset;
00855 axisRect.setBottom(QMIN(bottom, maxBottom));
00856 }
00857 <span class="keywordflow">else</span>
00858 {
00859 <span class="keywordflow">if</span> ( d_alignCanvasToScales )
00860 {
00861 canvasRect.setBottom(QMIN(canvasRect.bottom(),
00862 axisRect.bottom() + bottomOffset));
00863 }
00864 <span class="keywordflow">else</span>
00865 {
00866 <span class="keywordflow">if</span> ( bottomOffset > 0 )
00867 axisRect.setBottom(axisRect.bottom() - bottomOffset);
00868 }
00869 }
00870
00871 <span class="keyword">const</span> <span class="keywordtype">int</span> topOffset = backboneOffset[QwtPlot::xTop] - endDist;
00872
00873 <span class="keywordflow">if</span> ( scaleRect[QwtPlot::xTop].isValid() )
00874 {
00875 <span class="keywordtype">int</span> minTop = scaleRect[QwtPlot::xTop].bottom() -
00876 d_layoutData->scale[QwtPlot::xTop].tickOffset;
00877
00878 <span class="keywordtype">int</span> top = axisRect.top() + topOffset;
00879 axisRect.setTop(QMAX(top, minTop));
00880 }
00881 <span class="keywordflow">else</span>
00882 {
00883 <span class="keywordflow">if</span> ( d_alignCanvasToScales )
00884 {
00885 canvasRect.setTop(QMAX(canvasRect.top(),
00886 axisRect.top() + - topOffset));
00887 }
00888 <span class="keywordflow">else</span>
00889 {
00890 <span class="keywordflow">if</span> ( topOffset > 0 )
00891 axisRect.setTop(axisRect.top() + topOffset);
00892 }
00893 }
00894 }
00895 }
00896 }
00897
<a name="l00910"></a><a class="code" href="class_qwt_plot_layout.html#a18">00910</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_layout.html#a18">QwtPlotLayout::activate</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_plot.html">QwtPlot</a> *plot,
00911 <span class="keyword">const</span> QRect &plotRect, <span class="keywordtype">int</span> options)
00912 {
00913 <a class="code" href="class_qwt_plot_layout.html#a19">invalidate</a>();
00914
00915 QRect rect(plotRect); <span class="comment">// undistributed rest of the plot rect</span>
00916
00917 <span class="keywordflow">if</span> ( !(options & IgnoreMargin) )
00918 {
00919 <span class="comment">// subtract the margin</span>
00920
00921 rect.setRect(
00922 rect.x() + d_margin,
00923 rect.y() + d_margin,
00924 rect.width() - 2 * d_margin,
00925 rect.height() - 2 * d_margin
00926 );
00927 }
00928
00929 <span class="comment">// We extract all layout relevant data from the widgets,</span>
00930 <span class="comment">// filter them through pfilter and save them to d_layoutData.</span>
00931
00932 d_layoutData->init(plot, rect);
00933
00934 <span class="keywordflow">if</span> (!(options & IgnoreLegend)
00935 && plot-><a class="code" href="class_qwt_plot.html#a170">legend</a>() && !plot-><a class="code" href="class_qwt_plot.html#a170">legend</a>()-><a class="code" href="class_qwt_legend.html#a15">isEmpty</a>() )
00936 {
00937 d_legendRect = <a class="code" href="class_qwt_plot_layout.html#b0">layoutLegend</a>(options, rect);
00938
00939 <span class="comment">// subtract d_legendRect from rect</span>
00940
00941 <span class="keyword">const</span> QRegion region(rect);
00942 rect = region.subtract(d_legendRect).boundingRect();
00943
00944 <span class="keywordflow">if</span> ( d_layoutData->legend.frameWidth &&
00945 !(options & IgnoreFrames ) )
00946 {
00947 <span class="comment">// In case of a frame we have to insert a spacing.</span>
00948 <span class="comment">// Otherwise the leading of the font separates</span>
00949 <span class="comment">// legend and scale/canvas</span>
00950
00951 <span class="keywordflow">switch</span>(d_legendPos)
00952 {
00953 <span class="keywordflow">case</span> QwtPlot::Left:
00954 rect.setLeft(rect.left() + d_spacing);
00955 <span class="keywordflow">break</span>;
00956 <span class="keywordflow">case</span> QwtPlot::Right:
00957 rect.setRight(rect.right() - d_spacing);
00958 <span class="keywordflow">break</span>;
00959 <span class="keywordflow">case</span> QwtPlot::Top:
00960 rect.setTop(rect.top() + d_spacing);
00961 <span class="keywordflow">break</span>;
00962 <span class="keywordflow">case</span> QwtPlot::Bottom:
00963 rect.setBottom(rect.bottom() - d_spacing);
00964 <span class="keywordflow">break</span>;
00965 }
00966 }
00967 }
00968
00969 <span class="comment">/*</span>
00970 <span class="comment"> +---+-----------+---+</span>
00971 <span class="comment"> | Title |</span>
00972 <span class="comment"> +---+-----------+---+</span>
00973 <span class="comment"> | | Axis | |</span>
00974 <span class="comment"> +---+-----------+---+</span>
00975 <span class="comment"> | A | | A |</span>
00976 <span class="comment"> | x | Canvas | x |</span>
00977 <span class="comment"> | i | | i |</span>
00978 <span class="comment"> | s | | s |</span>
00979 <span class="comment"> +---+-----------+---+</span>
00980 <span class="comment"> | | Axis | |</span>
00981 <span class="comment"> +---+-----------+---+</span>
00982 <span class="comment"> */</span>
00983
00984
00985 <span class="comment">// axes and title include text labels. The height of each</span>
00986 <span class="comment">// label depends on its line breaks, that depend on the width</span>
00987 <span class="comment">// for the label. A line break in a horizontal text will reduce</span>
00988 <span class="comment">// the available width for vertical texts and vice versa. </span>
00989 <span class="comment">// expandLineBreaks finds the height/width for title and axes</span>
00990 <span class="comment">// including all line breaks.</span>
00991
00992 <span class="keywordtype">int</span> dimTitle, dimAxes[QwtPlot::axisCnt];
00993 <a class="code" href="class_qwt_plot_layout.html#b2">expandLineBreaks</a>(options, rect, dimTitle, dimAxes);
00994
00995 <span class="keywordflow">if</span> (dimTitle > 0 )
00996 {
00997 d_titleRect = QRect(rect.x(), rect.y(),
00998 rect.width(), dimTitle);
00999
01000 <span class="keywordflow">if</span> ( d_layoutData->scale[QwtPlot::yLeft].isEnabled !=
01001 d_layoutData->scale[QwtPlot::yRight].isEnabled )
01002 {
01003 <span class="comment">// if only one of the y axes is missing we align</span>
01004 <span class="comment">// the title centered to the canvas</span>
01005
01006 d_titleRect.setX(rect.x() + dimAxes[QwtPlot::yLeft]);
01007 d_titleRect.setWidth(rect.width()
01008 - dimAxes[QwtPlot::yLeft] - dimAxes[QwtPlot::yRight]);
01009 }
01010
01011 <span class="comment">// subtract title </span>
01012 rect.setTop(rect.top() + dimTitle + d_spacing);
01013 }
01014
01015 d_canvasRect.setRect(
01016 rect.x() + dimAxes[QwtPlot::yLeft],
01017 rect.y() + dimAxes[QwtPlot::xTop],
01018 rect.width() - dimAxes[QwtPlot::yRight] - dimAxes[QwtPlot::yLeft],
01019 rect.height() - dimAxes[QwtPlot::xBottom] - dimAxes[QwtPlot::xTop]);
01020
01021 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> axis = 0; axis < QwtPlot::axisCnt; axis++ )
01022 {
01023 <span class="comment">// set the rects for the axes</span>
01024
01025 <span class="keywordflow">if</span> ( dimAxes[axis] )
01026 {
01027 <span class="keywordtype">int</span> dim = dimAxes[axis];
01028 QRect &<a class="code" href="class_qwt_plot_layout.html#a22">scaleRect</a> = d_scaleRect[axis];
01029
01030 scaleRect = d_canvasRect;
01031 <span class="keywordflow">switch</span>(axis)
01032 {
01033 <span class="keywordflow">case</span> QwtPlot::yLeft:
01034 scaleRect.setX(d_canvasRect.left() - dim);
01035 scaleRect.setWidth(dim);
01036 <span class="keywordflow">break</span>;
01037 <span class="keywordflow">case</span> QwtPlot::yRight:
01038 scaleRect.setX(d_canvasRect.right() + 1);
01039 scaleRect.setWidth(dim);
01040 <span class="keywordflow">break</span>;
01041 <span class="keywordflow">case</span> QwtPlot::xBottom:
01042 scaleRect.setY(d_canvasRect.bottom() + 1);
01043 scaleRect.setHeight(dim);
01044 <span class="keywordflow">break</span>;
01045 <span class="keywordflow">case</span> QwtPlot::xTop:
01046 scaleRect.setY(d_canvasRect.top() - dim);
01047 scaleRect.setHeight(dim);
01048 <span class="keywordflow">break</span>;
01049 }
01050 scaleRect = scaleRect.normalize();
01051 }
01052 }
01053
01054 <span class="comment">// +---+-----------+---+</span>
01055 <span class="comment">// | <- Axis -> |</span>
01056 <span class="comment">// +-^-+-----------+-^-+</span>
01057 <span class="comment">// | | | | | |</span>
01058 <span class="comment">// | | | |</span>
01059 <span class="comment">// | A | | A |</span>
01060 <span class="comment">// | x | Canvas | x |</span>
01061 <span class="comment">// | i | | i |</span>
01062 <span class="comment">// | s | | s |</span>
01063 <span class="comment">// | | | |</span>
01064 <span class="comment">// | | | | | |</span>
01065 <span class="comment">// +-V-+-----------+-V-+</span>
01066 <span class="comment">// | <- Axis -> |</span>
01067 <span class="comment">// +---+-----------+---+</span>
01068
01069 <span class="comment">// The ticks of the axes - not the labels above - should</span>
01070 <span class="comment">// be aligned to the canvas. So we try to use the empty</span>
01071 <span class="comment">// corners to extend the axes, so that the label texts</span>
01072 <span class="comment">// left/right of the min/max ticks are moved into them.</span>
01073
01074 <a class="code" href="class_qwt_plot_layout.html#b3">alignScales</a>(options, d_canvasRect, d_scaleRect);
01075
01076 <span class="keywordflow">if</span> (!d_legendRect.isEmpty() )
01077 {
01078 <span class="comment">// We prefer to align the legend to the canvas - not to</span>
01079 <span class="comment">// the complete plot - if possible.</span>
01080
01081 d_legendRect = <a class="code" href="class_qwt_plot_layout.html#b1">alignLegend</a>(d_canvasRect, d_legendRect);
01082 }
01083 }
01084
01085 QwtPlotLayoutData::QwtPlotLayoutData()
01086 {
01087 title.text = NULL;
01088 }
01089
01090 QwtPlotLayoutData::~QwtPlotLayoutData()
01091 {
01092 <span class="keyword">delete</span> title.text;
01093 }
01094
01095 <span class="comment">/*</span>
01096 <span class="comment"> Extract all layout relevant data from the plot components</span>
01097 <span class="comment">*/</span>
01098
01099 <span class="keywordtype">void</span> QwtPlotLayoutData::init(<span class="keyword">const</span> <a class="code" href="class_qwt_plot.html">QwtPlot</a> *plot, <span class="keyword">const</span> QRect &rect)
01100 {
01101 <span class="comment">// legend</span>
01102
01103 legend.frameWidth = plot-><a class="code" href="class_qwt_plot.html#a170">legend</a>()->frameWidth();
01104 legend.vScrollBarWidth =
01105 plot-><a class="code" href="class_qwt_plot.html#a170">legend</a>()->verticalScrollBar()-><a class="code" href="class_qwt_legend.html#a18">sizeHint</a>().width();
01106 legend.hScrollBarHeight =
01107 plot-><a class="code" href="class_qwt_plot.html#a170">legend</a>()->horizontalScrollBar()-><a class="code" href="class_qwt_legend.html#a18">sizeHint</a>().height();
01108
01109 <span class="keyword">const</span> QSize hint = plot-><a class="code" href="class_qwt_plot.html#a170">legend</a>()-><a class="code" href="class_qwt_legend.html#a18">sizeHint</a>();
01110
01111 <span class="keywordtype">int</span> w = QMIN(hint.width(), rect.width());
01112 <span class="keywordtype">int</span> h = plot-><a class="code" href="class_qwt_plot.html#a170">legend</a>()-><a class="code" href="class_qwt_legend.html#a19">heightForWidth</a>(w);
01113 <span class="keywordflow">if</span> ( h == 0 )
01114 h = hint.height();
01115
01116 <span class="keywordflow">if</span> ( h > rect.height() )
01117 w += legend.vScrollBarWidth;
01118
01119 legend.hint = QSize(w, h);
01120
01121 <span class="comment">// title </span>
01122
01123 title.frameWidth = 0;
01124 <span class="keyword">delete</span> title.text;
01125 title.text = NULL;
01126
01127 <span class="keywordflow">if</span> (plot-><a class="code" href="class_qwt_plot.html#a29">titleLabel</a>() && !plot-><a class="code" href="class_qwt_plot.html#a29">titleLabel</a>()->text().isEmpty())
01128 {
01129 <span class="keyword">const</span> QLabel *label = plot-><a class="code" href="class_qwt_plot.html#a29">titleLabel</a>();
01130 title.text = <a class="code" href="class_qwt_text.html#e0">QwtText::makeText</a>(label->text(), label->textFormat(),
01131 label->alignment(), label->font());
01132 title.frameWidth = plot-><a class="code" href="class_qwt_plot.html#a29">titleLabel</a>()->frameWidth();
01133 }
01134
01135 <span class="comment">// scales </span>
01136
01137 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> axis = 0; axis < QwtPlot::axisCnt; axis++ )
01138 {
01139 <span class="keyword">const</span> <a class="code" href="class_qwt_scale.html">QwtScale</a> *sd = plot-><a class="code" href="class_qwt_plot.html#a109">axis</a>(axis);
01140 <span class="keywordflow">if</span> ( sd )
01141 {
01142 scale[axis].isEnabled = TRUE;
01143
01144 scale[axis].scale = sd;
01145
01146 scale[axis].scaleFont = sd->font();
01147
01148 scale[axis].start = sd-><a class="code" href="class_qwt_scale.html#a12">startBorderDist</a>();
01149 scale[axis].end = sd-><a class="code" href="class_qwt_scale.html#a13">endBorderDist</a>();
01150
01151 scale[axis].baseLineOffset = sd-><a class="code" href="class_qwt_scale.html#a16">baseLineDist</a>();
01152 scale[axis].tickOffset = sd-><a class="code" href="class_qwt_scale.html#a16">baseLineDist</a>() +
01153 (<span class="keywordtype">int</span>)sd-><a class="code" href="class_qwt_scale.html#a21">scaleDraw</a>()-><a class="code" href="class_qwt_scale_draw.html#a28">majTickLength</a>();
01154
01155 scale[axis].dimWithoutTitle = sd-><a class="code" href="class_qwt_scale.html#a30">dimForLength</a>(
01156 QCOORD_MAX, scale[axis].scaleFont);
01157
01158 <span class="keywordflow">if</span> ( !sd-><a class="code" href="class_qwt_scale.html#a4">title</a>().isEmpty() )
01159 {
01160 scale[axis].dimWithoutTitle -=
01161 sd-><a class="code" href="class_qwt_scale.html#a29">titleHeightForWidth</a>(QCOORD_MAX);
01162 }
01163 }
01164 <span class="keywordflow">else</span>
01165 {
01166 scale[axis].isEnabled = FALSE;
01167 scale[axis].start = 0;
01168 scale[axis].end = 0;
01169 scale[axis].baseLineOffset = 0;
01170 scale[axis].tickOffset = 0;
01171 scale[axis].dimWithoutTitle = 0;
01172 }
01173 }
01174
01175 <span class="comment">// canvas </span>
01176
01177 canvas.frameWidth = plot-><a class="code" href="class_qwt_plot.html#a31">canvas</a>()->frameWidth();
01178 }
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