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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<h1>qwt_layout_metrics.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 <qapplication.h></span>
00011 <span class="preprocessor">#include <qpainter.h></span>
00012 <span class="preprocessor">#include <qpaintdevicemetrics.h></span>
00013 <span class="preprocessor">#include <qsimplerichtext.h></span>
00014 <span class="preprocessor">#if QT_VERSION >= 300</span>
00015 <span class="preprocessor"></span><span class="preprocessor">#include <qdesktopwidget.h></span>
00016 <span class="preprocessor">#endif</span>
00017 <span class="preprocessor"></span><span class="preprocessor">#include "qwt_layout_metrics.h"</span>
00018
00019 QwtMetricsMap::QwtMetricsMap()
00020 {
00021 d_screenToLayoutX = d_screenToLayoutY =
00022 d_deviceToLayoutX = d_deviceToLayoutY = 1.0;
00023 }
00024
00025 <span class="keywordtype">void</span> QwtMetricsMap::setMetrics(<span class="keyword">const</span> QPaintDeviceMetrics &layoutMetrics,
00026 <span class="keyword">const</span> QPaintDeviceMetrics &deviceMetrics)
00027 {
00028 <span class="keyword">const</span> QPaintDeviceMetrics screenMetrics(QApplication::desktop());
00029
00030 d_screenToLayoutX = double(layoutMetrics.logicalDpiX()) /
00031 double(screenMetrics.logicalDpiX());
00032 d_screenToLayoutY = double(layoutMetrics.logicalDpiY()) /
00033 double(screenMetrics.logicalDpiY());
00034
00035 d_deviceToLayoutX = double(layoutMetrics.logicalDpiX()) /
00036 double(deviceMetrics.logicalDpiX());
00037 d_deviceToLayoutY = double(layoutMetrics.logicalDpiY()) /
00038 double(deviceMetrics.logicalDpiY());
00039 }
00040
00041 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00042 <span class="preprocessor"></span>QPoint QwtMetricsMap::layoutToDevice(<span class="keyword">const</span> QPoint &point,
00043 <span class="keyword">const</span> QPainter *painter) <span class="keyword">const</span>
00044 <span class="preprocessor">#else</span>
00045 <span class="preprocessor"></span>QPoint QwtMetricsMap::layoutToDevice(<span class="keyword">const</span> QPoint &point,
00046 <span class="keyword">const</span> QPainter *) const
00047 #endif
00048 {
00049 <span class="keywordflow">if</span> ( isIdentity() )
00050 <span class="keywordflow">return</span> point;
00051
00052 QPoint mappedPoint(point);
00053
00054 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00055 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( painter )
00056 mappedPoint = painter->worldMatrix().map(mappedPoint);
00057 <span class="preprocessor">#endif</span>
00058 <span class="preprocessor"></span>
00059 mappedPoint.setX(layoutToDeviceX(mappedPoint.x()));
00060 mappedPoint.setY(layoutToDeviceY(mappedPoint.y()));
00061
00062 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00063 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( painter )
00064 mappedPoint = painter->worldMatrix().invert().map(mappedPoint);
00065 <span class="preprocessor">#endif</span>
00066 <span class="preprocessor"></span>
00067 <span class="keywordflow">return</span> mappedPoint;
00068 }
00069
00070 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00071 <span class="preprocessor"></span>QPoint QwtMetricsMap::deviceToLayout(<span class="keyword">const</span> QPoint &point,
00072 <span class="keyword">const</span> QPainter *painter) <span class="keyword">const</span>
00073 <span class="preprocessor">#else</span>
00074 <span class="preprocessor"></span>QPoint QwtMetricsMap::deviceToLayout(<span class="keyword">const</span> QPoint &point,
00075 <span class="keyword">const</span> QPainter *) const
00076 #endif
00077 {
00078 <span class="keywordflow">if</span> ( isIdentity() )
00079 <span class="keywordflow">return</span> point;
00080
00081 QPoint mappedPoint(point);
00082
00083 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00084 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( painter )
00085 mappedPoint = painter->worldMatrix().map(mappedPoint);
00086 <span class="preprocessor">#endif</span>
00087 <span class="preprocessor"></span>
00088 mappedPoint.setX(deviceToLayoutX(mappedPoint.x()));
00089 mappedPoint.setY(deviceToLayoutY(mappedPoint.y()));
00090
00091 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00092 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( painter )
00093 mappedPoint = painter->worldMatrix().invert().map(mappedPoint);
00094 <span class="preprocessor">#endif</span>
00095 <span class="preprocessor"></span>
00096 <span class="keywordflow">return</span> mappedPoint;
00097 }
00098
00099 QPoint QwtMetricsMap::screenToLayout(<span class="keyword">const</span> QPoint &point)<span class="keyword"> const</span>
00100 <span class="keyword"></span>{
00101 <span class="keywordflow">if</span> ( d_screenToLayoutX == 1.0 && d_screenToLayoutY == 1.0 )
00102 <span class="keywordflow">return</span> point;
00103
00104 <span class="keywordflow">return</span> QPoint(screenToLayoutX(point.x()), screenToLayoutY(point.y()));
00105 }
00106
00107 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00108 <span class="preprocessor"></span>QRect QwtMetricsMap::layoutToDevice(<span class="keyword">const</span> QRect &rect,
00109 <span class="keyword">const</span> QPainter *painter) <span class="keyword">const</span>
00110 <span class="preprocessor">#else</span>
00111 <span class="preprocessor"></span>QRect QwtMetricsMap::layoutToDevice(<span class="keyword">const</span> QRect &rect,
00112 <span class="keyword">const</span> QPainter *) const
00113 #endif
00114 {
00115 <span class="keywordflow">if</span> ( isIdentity() )
00116 <span class="keywordflow">return</span> rect;
00117
00118 QRect mappedRect(rect);
00119 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00120 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( painter )
00121 mappedRect = translate(painter->worldMatrix(), mappedRect);
00122 <span class="preprocessor">#endif</span>
00123 <span class="preprocessor"></span>
00124 mappedRect = QRect(
00125 layoutToDeviceX(mappedRect.x()),
00126 layoutToDeviceY(mappedRect.y()),
00127 layoutToDeviceX(mappedRect.width()),
00128 layoutToDeviceY(mappedRect.height())
00129 );
00130
00131 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00132 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( painter )
00133 mappedRect = translate(painter->worldMatrix().invert(), mappedRect);
00134 <span class="preprocessor">#endif</span>
00135 <span class="preprocessor"></span>
00136 <span class="keywordflow">return</span> mappedRect;
00137 }
00138
00139 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00140 <span class="preprocessor"></span>QRect QwtMetricsMap::deviceToLayout(<span class="keyword">const</span> QRect &rect,
00141 <span class="keyword">const</span> QPainter *painter) <span class="keyword">const</span>
00142 <span class="preprocessor">#else</span>
00143 <span class="preprocessor"></span>QRect QwtMetricsMap::deviceToLayout(<span class="keyword">const</span> QRect &rect,
00144 <span class="keyword">const</span> QPainter *) const
00145 #endif
00146 {
00147 <span class="keywordflow">if</span> ( isIdentity() )
00148 <span class="keywordflow">return</span> rect;
00149
00150 QRect mappedRect(rect);
00151 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00152 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( painter )
00153 mappedRect = translate(painter->worldMatrix(), mappedRect);
00154 <span class="preprocessor">#endif</span>
00155 <span class="preprocessor"></span>
00156 mappedRect = QRect(
00157 deviceToLayoutX(mappedRect.x()),
00158 deviceToLayoutY(mappedRect.y()),
00159 deviceToLayoutX(mappedRect.width()),
00160 deviceToLayoutY(mappedRect.height())
00161 );
00162
00163 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00164 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( painter )
00165 mappedRect = translate(painter->worldMatrix().invert(), mappedRect);
00166 <span class="preprocessor">#endif</span>
00167 <span class="preprocessor"></span>
00168 <span class="keywordflow">return</span> mappedRect;
00169 }
00170
00171 QRect QwtMetricsMap::screenToLayout(<span class="keyword">const</span> QRect &rect)<span class="keyword"> const</span>
00172 <span class="keyword"></span>{
00173 <span class="keywordflow">if</span> ( d_deviceToLayoutX == 1.0 && d_deviceToLayoutY == 1.0 )
00174 <span class="keywordflow">return</span> rect;
00175
00176 <span class="keywordflow">return</span> QRect(screenToLayoutX(rect.x()), screenToLayoutY(rect.y()),
00177 screenToLayoutX(rect.width()), screenToLayoutY(rect.height()));
00178 }
00179
00180 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00181 <span class="preprocessor"></span>QPointArray QwtMetricsMap::layoutToDevice(<span class="keyword">const</span> QPointArray &pa,
00182 <span class="keyword">const</span> QPainter *painter) <span class="keyword">const</span>
00183 <span class="preprocessor">#else</span>
00184 <span class="preprocessor"></span>QPointArray QwtMetricsMap::layoutToDevice(<span class="keyword">const</span> QPointArray &pa,
00185 <span class="keyword">const</span> QPainter *) const
00186 #endif
00187 {
00188 <span class="keywordflow">if</span> ( isIdentity() )
00189 <span class="keywordflow">return</span> pa;
00190
00191 QPointArray mappedPa(pa);
00192
00193 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00194 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( painter )
00195 mappedPa = translate(painter->worldMatrix(), mappedPa);
00196 <span class="preprocessor">#endif</span>
00197 <span class="preprocessor"></span>
00198 QWMatrix m;
00199 m.scale(1.0 / d_deviceToLayoutX, 1.0 / d_deviceToLayoutY);
00200 mappedPa = translate(m, mappedPa);
00201
00202 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00203 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( painter )
00204 mappedPa = translate(painter->worldMatrix().invert(), mappedPa);
00205 <span class="preprocessor">#endif</span>
00206 <span class="preprocessor"></span>
00207 <span class="keywordflow">return</span> mappedPa;
00208
00209 }
00210
00211 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00212 <span class="preprocessor"></span>QPointArray QwtMetricsMap::deviceToLayout(<span class="keyword">const</span> QPointArray &pa,
00213 <span class="keyword">const</span> QPainter *painter) <span class="keyword">const</span>
00214 <span class="preprocessor">#else</span>
00215 <span class="preprocessor"></span>QPointArray QwtMetricsMap::deviceToLayout(<span class="keyword">const</span> QPointArray &pa,
00216 <span class="keyword">const</span> QPainter *) const
00217 #endif
00218 {
00219 <span class="keywordflow">if</span> ( isIdentity() )
00220 <span class="keywordflow">return</span> pa;
00221
00222 QPointArray mappedPa(pa);
00223
00224 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00225 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( painter )
00226 mappedPa = translate(painter->worldMatrix(), mappedPa);
00227 <span class="preprocessor">#endif</span>
00228 <span class="preprocessor"></span>
00229 QWMatrix m;
00230 m.scale(d_deviceToLayoutX, d_deviceToLayoutY);
00231 mappedPa = translate(m, mappedPa);
00232
00233 <span class="preprocessor">#ifndef QT_NO_TRANSFORMATIONS</span>
00234 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( painter )
00235 mappedPa = translate(painter->worldMatrix().invert(), mappedPa);
00236 <span class="preprocessor">#endif</span>
00237 <span class="preprocessor"></span>
00238 <span class="keywordflow">return</span> mappedPa;
00239 }
00240
00245 QRect QwtMetricsMap::translate(
00246 <span class="keyword">const</span> QWMatrix &m, <span class="keyword">const</span> QRect &rect)
00247 {
00248 <span class="preprocessor">#if QT_VERSION < 300</span>
00249 <span class="preprocessor"></span> <span class="keywordflow">return</span> m.map(rect.normalize());
00250 <span class="preprocessor">#else</span>
00251 <span class="preprocessor"></span> <span class="keywordflow">return</span> m.mapRect(rect);
00252 <span class="preprocessor">#endif</span>
00253 <span class="preprocessor"></span>}
00254
00260 QPointArray QwtMetricsMap::translate(
00261 <span class="keyword">const</span> QWMatrix &m, <span class="keyword">const</span> QPointArray &pa)
00262 {
00263 <span class="preprocessor">#if QT_VERSION < 300</span>
00264 <span class="preprocessor"></span> <span class="keywordflow">return</span> m.map(pa);
00265 <span class="preprocessor">#elif QT_VERSION < 400</span>
00266 <span class="preprocessor"></span> <span class="keywordflow">return</span> m * pa;
00267 <span class="preprocessor">#else</span>
00268 <span class="preprocessor"></span> <span class="keywordflow">return</span> m.map(pa);
00269 <span class="preprocessor">#endif</span>
00270 <span class="preprocessor"></span>}
00271
00272 QwtLayoutMetrics::QwtLayoutMetrics()
00273 {
00274 }
00275
00276 QwtLayoutMetrics::QwtLayoutMetrics(<span class="keyword">const</span> QwtMetricsMap &map):
00277 d_map(map)
00278 {
00279 }
00280
00281 <span class="keywordtype">void</span> QwtLayoutMetrics::setMap(<span class="keyword">const</span> QwtMetricsMap &map)
00282 {
00283 d_map = map;
00284 }
00285
00286 <span class="keywordtype">int</span> QwtLayoutMetrics::heightForWidth(<span class="keyword">const</span> QString &text,
00287 <span class="keywordtype">int</span> width, <span class="keywordtype">int</span> flags, <span class="keyword">const</span> QFontMetrics &fm)<span class="keyword"> const</span>
00288 <span class="keyword"></span>{
00289 <span class="keyword">const</span> QRect rect = fm.boundingRect(
00290 0, 0, d_map.layoutToScreenX(width), QCOORD_MAX, flags, text);
00291 <span class="keywordflow">return</span> d_map.screenToLayoutY(rect.height());
00292 }
00293
00294 <span class="keywordtype">int</span> QwtLayoutMetrics::heightForWidth(<span class="keyword">const</span> QString &text,
00295 <span class="keywordtype">int</span> width, <span class="keywordtype">int</span> flags, QPainter *painter)<span class="keyword"> const</span>
00296 <span class="keyword"></span>{
00297 <span class="keyword">const</span> QRect rect = painter->boundingRect(
00298 0, 0, d_map.layoutToDeviceX(width), QCOORD_MAX, flags, text);
00299
00300 <span class="keywordflow">return</span> d_map.deviceToLayoutY(rect.height());
00301 }
00302
00303 QRect QwtLayoutMetrics::boundingRect(<span class="keyword">const</span> QString &text,
00304 <span class="keywordtype">int</span> flags, QPainter *painter)<span class="keyword"> const</span>
00305 <span class="keyword"></span>{
00306 <span class="keyword">const</span> QRect rect = painter->boundingRect(
00307 0, 0, 0, 0, flags, text);
00308
00309 <span class="keywordflow">return</span> d_map.deviceToLayout(rect);
00310 }
00311
00312 QRect QwtLayoutMetrics::boundingRect(<span class="keyword">const</span> QString &text,
00313 <span class="keywordtype">int</span> flags, <span class="keyword">const</span> QFontMetrics &fm)<span class="keyword"> const</span>
00314 <span class="keyword"></span>{
00315 QRect rect = fm.boundingRect(
00316 0, 0, QCOORD_MAX, QCOORD_MAX, flags, text);
00317
00318 <span class="keywordflow">return</span> d_map.screenToLayout(rect);
00319 }
00320
00321 <span class="preprocessor">#ifndef QT_NO_RICHTEXT</span>
00322 <span class="preprocessor"></span>
00323 <span class="keywordtype">int</span> QwtLayoutMetrics::heightForWidth(QSimpleRichText &text, <span class="keywordtype">int</span> width)<span class="keyword"> const</span>
00324 <span class="keyword"></span>{
00325 text.setWidth(d_map.layoutToScreenX(width));
00326 <span class="keywordflow">return</span> d_map.screenToLayoutY(text.height());
00327 }
00328
00329 QRect QwtLayoutMetrics::boundingRect(
00330 <span class="keyword">const</span> QSimpleRichText &text, <span class="keywordtype">int</span> flags, QPainter *painter)<span class="keyword"> const</span>
00331 <span class="keyword"></span>{
00332 <span class="keyword">const</span> <span class="keywordtype">int</span> tw = text.width();
00333
00334 <span class="keywordtype">int</span> w, h;
00335 <span class="keywordflow">if</span> ( painter )
00336 {
00337 ((QSimpleRichText &)text).setWidth(painter, QCOORD_MAX);
00338 w = d_map.deviceToLayoutX(text.widthUsed());
00339 h = d_map.deviceToLayoutY(text.height());
00340 }
00341 <span class="keywordflow">else</span>
00342 {
00343 ((QSimpleRichText &)text).setWidth(QCOORD_MAX);
00344 w = d_map.screenToLayoutX(text.widthUsed());
00345 h = d_map.screenToLayoutY(text.height());
00346 }
00347
00348 ((QSimpleRichText &)text).setWidth(tw); <span class="comment">// reset width</span>
00349
00350 <span class="keywordtype">int</span> x = 0;
00351 <span class="keywordtype">int</span> y = 0;
00352 <span class="keywordflow">if</span> (flags & Qt::AlignHCenter)
00353 x -= w/2;
00354 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (flags & Qt::AlignRight)
00355 x -= w;
00356
00357 <span class="keywordflow">if</span> (flags & Qt::AlignVCenter)
00358 y -= h/2;
00359 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (flags & Qt::AlignBottom)
00360 y -= h;
00361
00362 <span class="keywordflow">return</span> QRect(x, y, w, h);
00363 }
00364
00365 <span class="preprocessor">#endif // !QT_NO_RICHTEXT</span>
</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
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border=0 ></a> 1.3.8 </small></address>
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