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<h1>qwt_plot_picker.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 "qwt_plot.h"</span>
00013 <span class="preprocessor">#include "qwt_double_rect.h"</span>
00014 <span class="preprocessor">#include "qwt_painter.h"</span>
00015 <span class="preprocessor">#include "qwt_array.h"</span>
00016 <span class="preprocessor">#include "qwt_plot_picker.h"</span>
00017
<a name="l00038"></a><a class="code" href="class_qwt_plot_picker.html#a0">00038</a> <a class="code" href="class_qwt_plot_picker.html#a0">QwtPlotPicker::QwtPlotPicker</a>(<a class="code" href="class_qwt_plot_canvas.html">QwtPlotCanvas</a> *canvas, <span class="keyword">const</span> <span class="keywordtype">char</span> *name):
00039 <a class="code" href="class_qwt_picker.html">QwtPicker</a>(canvas, name),
00040 d_xAxis(-1),
00041 d_yAxis(-1)
00042 {
00043 <span class="keywordflow">if</span> ( !canvas )
00044 <span class="keywordflow">return</span>;
00045
00046 <span class="comment">// attach axes</span>
00047
00048 <span class="keywordtype">int</span> <a class="code" href="class_qwt_plot_picker.html#a4">xAxis</a> = QwtPlot::xBottom;
00049
00050 <span class="keyword">const</span> <a class="code" href="class_qwt_plot.html">QwtPlot</a> *<a class="code" href="class_qwt_plot_picker.html#a6">plot</a> = <a class="code" href="class_qwt_plot_picker.html#a6">QwtPlotPicker::plot</a>();
00051 <span class="keywordflow">if</span> ( !plot-><a class="code" href="class_qwt_plot.html#a97">axisEnabled</a>(QwtPlot::xBottom) &&
00052 plot-><a class="code" href="class_qwt_plot.html#a97">axisEnabled</a>(QwtPlot::xTop) )
00053 {
00054 xAxis = QwtPlot::xTop;
00055 }
00056
00057 <span class="keywordtype">int</span> <a class="code" href="class_qwt_plot_picker.html#a5">yAxis</a> = QwtPlot::yLeft;
00058 <span class="keywordflow">if</span> ( !plot-><a class="code" href="class_qwt_plot.html#a97">axisEnabled</a>(QwtPlot::yLeft) &&
00059 plot-><a class="code" href="class_qwt_plot.html#a97">axisEnabled</a>(QwtPlot::yRight) )
00060 {
00061 yAxis = QwtPlot::yRight;
00062 }
00063
00064 <a class="code" href="class_qwt_plot_picker.html#a3">setAxis</a>(xAxis, yAxis);
00065 }
00066
<a name="l00083"></a><a class="code" href="class_qwt_plot_picker.html#a1">00083</a> <a class="code" href="class_qwt_plot_picker.html#a0">QwtPlotPicker::QwtPlotPicker</a>(<span class="keywordtype">int</span> xAxis, <span class="keywordtype">int</span> yAxis,
00084 <a class="code" href="class_qwt_plot_canvas.html">QwtPlotCanvas</a> *canvas, <span class="keyword">const</span> <span class="keywordtype">char</span> *name):
00085 <a class="code" href="class_qwt_picker.html">QwtPicker</a>(canvas, name),
00086 d_xAxis(xAxis),
00087 d_yAxis(yAxis)
00088 {
00089 }
00090
<a name="l00114"></a><a class="code" href="class_qwt_plot_picker.html#a2">00114</a> <a class="code" href="class_qwt_plot_picker.html#a0">QwtPlotPicker::QwtPlotPicker</a>(<span class="keywordtype">int</span> xAxis, <span class="keywordtype">int</span> yAxis, <span class="keywordtype">int</span> selectionFlags,
00115 RubberBand rubberBand, DisplayMode cursorLabelMode,
00116 <a class="code" href="class_qwt_plot_canvas.html">QwtPlotCanvas</a> *canvas, <span class="keyword">const</span> <span class="keywordtype">char</span> *name):
00117 <a class="code" href="class_qwt_picker.html">QwtPicker</a>(selectionFlags, rubberBand, cursorLabelMode, canvas, name),
00118 d_xAxis(xAxis),
00119 d_yAxis(yAxis)
00120 {
00121 }
00122
<a name="l00124"></a><a class="code" href="class_qwt_plot_picker.html#a8">00124</a> <a class="code" href="class_qwt_plot_canvas.html">QwtPlotCanvas</a> *<a class="code" href="class_qwt_plot_picker.html#a8">QwtPlotPicker::canvas</a>()
00125 {
00126 QWidget *w = <a class="code" href="class_qwt_picker.html#a21">parentWidget</a>();
00127 <span class="keywordflow">if</span> ( w && w->inherits(<span class="stringliteral">"QwtPlotCanvas"</span>) )
00128 <span class="keywordflow">return</span> (<a class="code" href="class_qwt_plot_canvas.html">QwtPlotCanvas</a> *)w;
00129
00130 <span class="keywordflow">return</span> NULL;
00131 }
00132
<a name="l00134"></a><a class="code" href="class_qwt_plot_picker.html#a9">00134</a> <span class="keyword">const</span> <a class="code" href="class_qwt_plot_canvas.html">QwtPlotCanvas</a> *<a class="code" href="class_qwt_plot_picker.html#a8">QwtPlotPicker::canvas</a>()<span class="keyword"> const</span>
00135 <span class="keyword"></span>{
00136 <span class="keywordflow">return</span> ((<a class="code" href="class_qwt_plot_picker.html">QwtPlotPicker</a> *)<span class="keyword">this</span>)->canvas();
00137 }
00138
<a name="l00140"></a><a class="code" href="class_qwt_plot_picker.html#a6">00140</a> <a class="code" href="class_qwt_plot.html">QwtPlot</a> *<a class="code" href="class_qwt_plot_picker.html#a6">QwtPlotPicker::plot</a>()
00141 {
00142 QObject *w = <a class="code" href="class_qwt_plot_picker.html#a8">canvas</a>();
00143 <span class="keywordflow">if</span> ( w )
00144 {
00145 w = w->parent();
00146 <span class="keywordflow">if</span> ( w && w->inherits(<span class="stringliteral">"QwtPlot"</span>) )
00147 <span class="keywordflow">return</span> (<a class="code" href="class_qwt_plot.html">QwtPlot</a> *)w;
00148 }
00149
00150 <span class="keywordflow">return</span> NULL;
00151 }
00152
<a name="l00154"></a><a class="code" href="class_qwt_plot_picker.html#a7">00154</a> <span class="keyword">const</span> <a class="code" href="class_qwt_plot.html">QwtPlot</a> *<a class="code" href="class_qwt_plot_picker.html#a6">QwtPlotPicker::plot</a>()<span class="keyword"> const</span>
00155 <span class="keyword"></span>{
00156 <span class="keywordflow">return</span> ((<a class="code" href="class_qwt_plot_picker.html">QwtPlotPicker</a> *)<span class="keyword">this</span>)->plot();
00157 }
00158
<a name="l00170"></a><a class="code" href="class_qwt_plot_picker.html#b0">00170</a> <a class="code" href="class_qwt_double_rect.html">QwtDoubleRect</a> <a class="code" href="class_qwt_plot_picker.html#b0">QwtPlotPicker::scaleRect</a>()<span class="keyword"> const</span>
00171 <span class="keyword"></span>{
00172 <span class="keyword">const</span> <a class="code" href="class_qwt_plot.html">QwtPlot</a> *plt = <a class="code" href="class_qwt_plot_picker.html#a6">plot</a>();
00173
00174 <span class="keyword">const</span> <a class="code" href="class_qwt_double_rect.html">QwtDoubleRect</a> rect(
00175 plt-><a class="code" href="class_qwt_plot.html#a107">axisScale</a>(<a class="code" href="class_qwt_plot_picker.html#a4">xAxis</a>())-><a class="code" href="class_qwt_scale_div.html#a3">lBound</a>(),
00176 plt-><a class="code" href="class_qwt_plot.html#a107">axisScale</a>(<a class="code" href="class_qwt_plot_picker.html#a4">xAxis</a>())-><a class="code" href="class_qwt_scale_div.html#a4">hBound</a>(),
00177 plt-><a class="code" href="class_qwt_plot.html#a107">axisScale</a>(<a class="code" href="class_qwt_plot_picker.html#a5">yAxis</a>())-><a class="code" href="class_qwt_scale_div.html#a3">lBound</a>(),
00178 plt-><a class="code" href="class_qwt_plot.html#a107">axisScale</a>(<a class="code" href="class_qwt_plot_picker.html#a5">yAxis</a>())-><a class="code" href="class_qwt_scale_div.html#a4">hBound</a>()
00179 );
00180
00181 <span class="keywordflow">return</span> rect.normalize();
00182 }
00183
<a name="l00190"></a><a class="code" href="class_qwt_plot_picker.html#a3">00190</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_picker.html#a3">QwtPlotPicker::setAxis</a>(<span class="keywordtype">int</span> xAxis, <span class="keywordtype">int</span> yAxis)
00191 {
00192 <span class="keyword">const</span> <a class="code" href="class_qwt_plot.html">QwtPlot</a> *plt = <a class="code" href="class_qwt_plot_picker.html#a6">plot</a>();
00193 <span class="keywordflow">if</span> ( !plt )
00194 <span class="keywordflow">return</span>;
00195
00196 <span class="keywordflow">if</span> ( xAxis != d_xAxis || yAxis != d_yAxis )
00197 {
00198 d_xAxis = xAxis;
00199 d_yAxis = yAxis;
00200 }
00201 }
00202
<a name="l00204"></a><a class="code" href="class_qwt_plot_picker.html#a4">00204</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_plot_picker.html#a4">QwtPlotPicker::xAxis</a>()<span class="keyword"> const</span>
00205 <span class="keyword"></span>{
00206 <span class="keywordflow">return</span> d_xAxis;
00207 }
00208
<a name="l00210"></a><a class="code" href="class_qwt_plot_picker.html#a5">00210</a> <span class="keywordtype">int</span> <a class="code" href="class_qwt_plot_picker.html#a5">QwtPlotPicker::yAxis</a>()<span class="keyword"> const</span>
00211 <span class="keyword"></span>{
00212 <span class="keywordflow">return</span> d_yAxis;
00213 }
00214
<a name="l00221"></a><a class="code" href="class_qwt_plot_picker.html#b5">00221</a> QString <a class="code" href="class_qwt_plot_picker.html#b5">QwtPlotPicker::cursorLabel</a>(<span class="keyword">const</span> QPoint &pos)<span class="keyword"> const</span>
00222 <span class="keyword"></span>{
00223 <span class="keywordflow">return</span> <a class="code" href="class_qwt_plot_picker.html#b5">cursorLabel</a>(<a class="code" href="class_qwt_plot_picker.html#b1">invTransform</a>(pos));
00224 }
00225
<a name="l00238"></a><a class="code" href="class_qwt_plot_picker.html#b6">00238</a> QString <a class="code" href="class_qwt_plot_picker.html#b5">QwtPlotPicker::cursorLabel</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_double_point.html">QwtDoublePoint</a> &pos)<span class="keyword"> const</span>
00239 <span class="keyword"></span>{
00240 <span class="keywordflow">switch</span>(<a class="code" href="class_qwt_picker.html#a6">rubberBand</a>())
00241 {
00242 <span class="keywordflow">case</span> HLineRubberBand:
00243 <span class="keywordflow">return</span> QString().sprintf(<span class="stringliteral">"%.4f"</span>, pos.<a class="code" href="class_qwt_double_point.html#a5">y</a>());
00244 <span class="keywordflow">case</span> VLineRubberBand:
00245 <span class="keywordflow">return</span> QString().sprintf(<span class="stringliteral">"%.4f"</span>, pos.<a class="code" href="class_qwt_double_point.html#a4">x</a>());
00246 <span class="keywordflow">default</span>:
00247 <span class="keywordflow">return</span> QString().sprintf(<span class="stringliteral">"%.4f, %.4f"</span>, pos.<a class="code" href="class_qwt_double_point.html#a4">x</a>(), pos.<a class="code" href="class_qwt_double_point.html#a5">y</a>());
00248 }
00249 <span class="keywordflow">return</span> QString::null; <span class="comment">// make some dumb compilers happy</span>
00250 }
00251
<a name="l00261"></a><a class="code" href="class_qwt_plot_picker.html#b8">00261</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_picker.html#b8">QwtPlotPicker::append</a>(<span class="keyword">const</span> QPoint &pos)
00262 {
00263 <a class="code" href="class_qwt_picker.html#b3">QwtPicker::append</a>(pos);
00264 emit <a class="code" href="class_qwt_plot_picker.html#l3">appended</a>(<a class="code" href="class_qwt_plot_picker.html#b1">invTransform</a>(pos));
00265 }
00266
<a name="l00276"></a><a class="code" href="class_qwt_plot_picker.html#b7">00276</a> <span class="keywordtype">void</span> <a class="code" href="class_qwt_plot_picker.html#b7">QwtPlotPicker::move</a>(<span class="keyword">const</span> QPoint &pos)
00277 {
00278 <a class="code" href="class_qwt_picker.html#b4">QwtPicker::move</a>(pos);
00279 emit <a class="code" href="class_qwt_plot_picker.html#l4">moved</a>(<a class="code" href="class_qwt_plot_picker.html#b1">invTransform</a>(pos));
00280 }
00281
<a name="l00290"></a><a class="code" href="class_qwt_plot_picker.html#b9">00290</a> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_plot_picker.html#b9">QwtPlotPicker::end</a>(<span class="keywordtype">bool</span> ok)
00291 {
00292 ok = <a class="code" href="class_qwt_picker.html#b5">QwtPicker::end</a>(ok);
00293 <span class="keywordflow">if</span> ( !ok )
00294 <span class="keywordflow">return</span> FALSE;
00295
00296 <a class="code" href="class_qwt_plot.html">QwtPlot</a> *<a class="code" href="class_qwt_plot_picker.html#a6">plot</a> = <a class="code" href="class_qwt_plot_picker.html#a6">QwtPlotPicker::plot</a>();
00297 <span class="keywordflow">if</span> ( !plot )
00298 <span class="keywordflow">return</span> FALSE;
00299
00300 <span class="keyword">const</span> QPointArray &pa = <a class="code" href="class_qwt_picker.html#a24">selection</a>();
00301 <span class="keywordflow">if</span> ( pa.count() == 0 )
00302 <span class="keywordflow">return</span> FALSE;
00303
00304 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a4">selectionFlags</a>() & PointSelection )
00305 {
00306 <span class="keyword">const</span> <a class="code" href="class_qwt_double_point.html">QwtDoublePoint</a> pos = <a class="code" href="class_qwt_plot_picker.html#b1">invTransform</a>(pa[0]);
00307 emit <a class="code" href="class_qwt_plot_picker.html#l0">selected</a>(pos);
00308 }
00309 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( (<a class="code" href="class_qwt_picker.html#a4">selectionFlags</a>() & RectSelection) && pa.count() >= 2 )
00310 {
00311 QPoint p1 = pa[0];
00312 QPoint p2 = pa[int(pa.count() - 1)];
00313
00314 <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a4">selectionFlags</a>() & CenterToCorner )
00315 {
00316 p1.setX(p1.x() - (p2.x() - p1.x()));
00317 p1.setY(p1.y() - (p2.y() - p1.y()));
00318 }
00319 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_picker.html#a4">selectionFlags</a>() & CenterToRadius )
00320 {
00321 <span class="keyword">const</span> <span class="keywordtype">int</span> radius = QMAX(QABS(p2.x() - p1.x()),
00322 QABS(p2.y() - p1.y()));
00323 p2.setX(p1.x() + radius);
00324 p2.setY(p1.y() + radius);
00325 p1.setX(p1.x() - radius);
00326 p1.setY(p1.y() - radius);
00327 }
00328
00329 emit <a class="code" href="class_qwt_plot_picker.html#l0">selected</a>(<a class="code" href="class_qwt_plot_picker.html#b1">invTransform</a>(QRect(p1, p2)).normalize());
00330 }
00331 <span class="keywordflow">else</span>
00332 {
00333 QwtArray<QwtDoublePoint> dpa(pa.count());
00334 <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i < int(pa.count()); i++ )
00335 dpa[i] = <a class="code" href="class_qwt_plot_picker.html#b1">invTransform</a>(pa[i]);
00336
00337 emit <a class="code" href="class_qwt_plot_picker.html#l0">selected</a>(dpa);
00338 }
00339
00340 <span class="keywordflow">return</span> TRUE;
00341 }
00342
<a name="l00349"></a><a class="code" href="class_qwt_plot_picker.html#b1">00349</a> <a class="code" href="class_qwt_double_rect.html">QwtDoubleRect</a> <a class="code" href="class_qwt_plot_picker.html#b1">QwtPlotPicker::invTransform</a>(<span class="keyword">const</span> QRect &rect)<span class="keyword"> const</span>
00350 <span class="keyword"></span>{
00351 <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> xMap = <a class="code" href="class_qwt_plot_picker.html#a6">plot</a>()-><a class="code" href="class_qwt_plot.html#a39">canvasMap</a>(d_xAxis);
00352 <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> yMap = <a class="code" href="class_qwt_plot_picker.html#a6">plot</a>()-><a class="code" href="class_qwt_plot.html#a39">canvasMap</a>(d_yAxis);
00353
00354 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_rect.html">QwtDoubleRect</a>(
00355 xMap.<a class="code" href="class_qwt_di_map.html#a8">invTransform</a>(rect.left()),
00356 xMap.<a class="code" href="class_qwt_di_map.html#a8">invTransform</a>(rect.right()),
00357 yMap.<a class="code" href="class_qwt_di_map.html#a8">invTransform</a>(rect.top()),
00358 yMap.<a class="code" href="class_qwt_di_map.html#a8">invTransform</a>(rect.bottom())
00359 );
00360 }
00361
<a name="l00367"></a><a class="code" href="class_qwt_plot_picker.html#b2">00367</a> QRect <a class="code" href="class_qwt_plot_picker.html#b2">QwtPlotPicker::transform</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_double_rect.html">QwtDoubleRect</a> &rect)<span class="keyword"> const</span>
00368 <span class="keyword"></span>{
00369 <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> xMap = <a class="code" href="class_qwt_plot_picker.html#a6">plot</a>()-><a class="code" href="class_qwt_plot.html#a39">canvasMap</a>(d_xAxis);
00370 <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> yMap = <a class="code" href="class_qwt_plot_picker.html#a6">plot</a>()-><a class="code" href="class_qwt_plot.html#a39">canvasMap</a>(d_yAxis);
00371
00372 <span class="keyword">const</span> <span class="keywordtype">int</span> x1 = xMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(rect.<a class="code" href="class_qwt_double_rect.html#a7">x1</a>());
00373 <span class="keyword">const</span> <span class="keywordtype">int</span> x2 = xMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(rect.<a class="code" href="class_qwt_double_rect.html#a8">x2</a>());
00374 <span class="keyword">const</span> <span class="keywordtype">int</span> y1 = yMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(rect.<a class="code" href="class_qwt_double_rect.html#a9">y1</a>());
00375 <span class="keyword">const</span> <span class="keywordtype">int</span> y2 = yMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(rect.<a class="code" href="class_qwt_double_rect.html#a10">y2</a>());
00376
00377 <span class="keywordflow">return</span> QRect(x1, y1, x2 - x1, y2 - y1);
00378 }
00379
<a name="l00385"></a><a class="code" href="class_qwt_plot_picker.html#b3">00385</a> <a class="code" href="class_qwt_double_point.html">QwtDoublePoint</a> <a class="code" href="class_qwt_plot_picker.html#b1">QwtPlotPicker::invTransform</a>(<span class="keyword">const</span> QPoint &pos)<span class="keyword"> const</span>
00386 <span class="keyword"></span>{
00387 <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> xMap = <a class="code" href="class_qwt_plot_picker.html#a6">plot</a>()-><a class="code" href="class_qwt_plot.html#a39">canvasMap</a>(d_xAxis);
00388 <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> yMap = <a class="code" href="class_qwt_plot_picker.html#a6">plot</a>()-><a class="code" href="class_qwt_plot.html#a39">canvasMap</a>(d_yAxis);
00389
00390 <span class="keywordflow">return</span> <a class="code" href="class_qwt_double_point.html">QwtDoublePoint</a>(
00391 xMap.<a class="code" href="class_qwt_di_map.html#a8">invTransform</a>(pos.x()),
00392 yMap.<a class="code" href="class_qwt_di_map.html#a8">invTransform</a>(pos.y())
00393 );
00394 }
00395
<a name="l00401"></a><a class="code" href="class_qwt_plot_picker.html#b4">00401</a> QPoint <a class="code" href="class_qwt_plot_picker.html#b2">QwtPlotPicker::transform</a>(<span class="keyword">const</span> <a class="code" href="class_qwt_double_point.html">QwtDoublePoint</a> &pos)<span class="keyword"> const</span>
00402 <span class="keyword"></span>{
00403 <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> xMap = <a class="code" href="class_qwt_plot_picker.html#a6">plot</a>()-><a class="code" href="class_qwt_plot.html#a39">canvasMap</a>(d_xAxis);
00404 <a class="code" href="class_qwt_di_map.html">QwtDiMap</a> yMap = <a class="code" href="class_qwt_plot_picker.html#a6">plot</a>()-><a class="code" href="class_qwt_plot.html#a39">canvasMap</a>(d_yAxis);
00405
00406 <span class="keywordflow">return</span> QPoint(
00407 xMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(pos.<a class="code" href="class_qwt_double_point.html#a4">x</a>()),
00408 yMap.<a class="code" href="class_qwt_di_map.html#a7">transform</a>(pos.<a class="code" href="class_qwt_double_point.html#a5">y</a>())
00409 );
00410 }
00411
00412 <span class="comment">// Local Variables:</span>
00413 <span class="comment">// mode: C++</span>
00414 <span class="comment">// c-file-style: "stroustrup"</span>
00415 <span class="comment">// indent-tabs-mode: nil</span>
00416 <span class="comment">// End:</span>
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