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00012 #include "qwt_plot.h"
00013 #include "qwt_double_rect.h"
00014 #include "qwt_scale_div.h"
00015 #include "qwt_painter.h"
00016 #include "qwt_scale_map.h"
00017 #include "qwt_plot_picker.h"
00018
00032 QwtPlotPicker::QwtPlotPicker(QwtPlotCanvas *canvas):
00033 QwtPicker(canvas),
00034 d_xAxis(-1),
00035 d_yAxis(-1)
00036 {
00037 if ( !canvas )
00038 return;
00039
00040
00041
00042 int xAxis = QwtPlot::xBottom;
00043
00044 const QwtPlot *plot = QwtPlotPicker::plot();
00045 if ( !plot->axisEnabled(QwtPlot::xBottom) &&
00046 plot->axisEnabled(QwtPlot::xTop) )
00047 {
00048 xAxis = QwtPlot::xTop;
00049 }
00050
00051 int yAxis = QwtPlot::yLeft;
00052 if ( !plot->axisEnabled(QwtPlot::yLeft) &&
00053 plot->axisEnabled(QwtPlot::yRight) )
00054 {
00055 yAxis = QwtPlot::yRight;
00056 }
00057
00058 setAxis(xAxis, yAxis);
00059 }
00060
00070 QwtPlotPicker::QwtPlotPicker(int xAxis, int yAxis, QwtPlotCanvas *canvas):
00071 QwtPicker(canvas),
00072 d_xAxis(xAxis),
00073 d_yAxis(yAxis)
00074 {
00075 }
00076
00093 QwtPlotPicker::QwtPlotPicker(int xAxis, int yAxis, int selectionFlags,
00094 RubberBand rubberBand, DisplayMode trackerMode,
00095 QwtPlotCanvas *canvas):
00096 QwtPicker(selectionFlags, rubberBand, trackerMode, canvas),
00097 d_xAxis(xAxis),
00098 d_yAxis(yAxis)
00099 {
00100 }
00101
00103 QwtPlotCanvas *QwtPlotPicker::canvas()
00104 {
00105 QWidget *w = parentWidget();
00106 if ( w && w->inherits("QwtPlotCanvas") )
00107 return (QwtPlotCanvas *)w;
00108
00109 return NULL;
00110 }
00111
00113 const QwtPlotCanvas *QwtPlotPicker::canvas() const
00114 {
00115 return ((QwtPlotPicker *)this)->canvas();
00116 }
00117
00119 QwtPlot *QwtPlotPicker::plot()
00120 {
00121 QObject *w = canvas();
00122 if ( w )
00123 {
00124 w = w->parent();
00125 if ( w && w->inherits("QwtPlot") )
00126 return (QwtPlot *)w;
00127 }
00128
00129 return NULL;
00130 }
00131
00133 const QwtPlot *QwtPlotPicker::plot() const
00134 {
00135 return ((QwtPlotPicker *)this)->plot();
00136 }
00137
00143 QwtDoubleRect QwtPlotPicker::scaleRect() const
00144 {
00145 const QwtScaleDiv *xs = plot()->axisScaleDiv(xAxis());
00146 const QwtScaleDiv *ys = plot()->axisScaleDiv(yAxis());
00147
00148 const QwtDoubleRect rect( xs->lBound(), ys->lBound(),
00149 xs->range(), ys->range() );
00150
00151 return rect.normalized();
00152 }
00153
00160 void QwtPlotPicker::setAxis(int xAxis, int yAxis)
00161 {
00162 const QwtPlot *plt = plot();
00163 if ( !plt )
00164 return;
00165
00166 if ( xAxis != d_xAxis || yAxis != d_yAxis )
00167 {
00168 d_xAxis = xAxis;
00169 d_yAxis = yAxis;
00170 }
00171 }
00172
00174 int QwtPlotPicker::xAxis() const
00175 {
00176 return d_xAxis;
00177 }
00178
00180 int QwtPlotPicker::yAxis() const
00181 {
00182 return d_yAxis;
00183 }
00184
00191 QwtText QwtPlotPicker::trackerText(const QPoint &pos) const
00192 {
00193 return trackerText(invTransform(pos));
00194 }
00195
00208 QwtText QwtPlotPicker::trackerText(const QwtDoublePoint &pos) const
00209 {
00210 switch(rubberBand())
00211 {
00212 case HLineRubberBand:
00213 return QString().sprintf("%.4f", pos.y());
00214 case VLineRubberBand:
00215 return QString().sprintf("%.4f", pos.x());
00216 default:
00217 return QString().sprintf("%.4f, %.4f", pos.x(), pos.y());
00218 }
00219 return QwtText();
00220 }
00221
00231 void QwtPlotPicker::append(const QPoint &pos)
00232 {
00233 QwtPicker::append(pos);
00234 emit appended(invTransform(pos));
00235 }
00236
00246 void QwtPlotPicker::move(const QPoint &pos)
00247 {
00248 QwtPicker::move(pos);
00249 emit moved(invTransform(pos));
00250 }
00251
00260 bool QwtPlotPicker::end(bool ok)
00261 {
00262 ok = QwtPicker::end(ok);
00263 if ( !ok )
00264 return false;
00265
00266 QwtPlot *plot = QwtPlotPicker::plot();
00267 if ( !plot )
00268 return false;
00269
00270 const QwtPolygon &pa = selection();
00271 if ( pa.count() == 0 )
00272 return false;
00273
00274 if ( selectionFlags() & PointSelection )
00275 {
00276 const QwtDoublePoint pos = invTransform(pa[0]);
00277 emit selected(pos);
00278 }
00279 else if ( (selectionFlags() & RectSelection) && pa.count() >= 2 )
00280 {
00281 QPoint p1 = pa[0];
00282 QPoint p2 = pa[int(pa.count() - 1)];
00283
00284 if ( selectionFlags() & CenterToCorner )
00285 {
00286 p1.setX(p1.x() - (p2.x() - p1.x()));
00287 p1.setY(p1.y() - (p2.y() - p1.y()));
00288 }
00289 else if ( selectionFlags() & CenterToRadius )
00290 {
00291 const int radius = qwtMax(qwtAbs(p2.x() - p1.x()),
00292 qwtAbs(p2.y() - p1.y()));
00293 p2.setX(p1.x() + radius);
00294 p2.setY(p1.y() + radius);
00295 p1.setX(p1.x() - radius);
00296 p1.setY(p1.y() - radius);
00297 }
00298
00299 emit selected(invTransform(QRect(p1, p2)).normalized());
00300 }
00301 else
00302 {
00303 QwtArray<QwtDoublePoint> dpa(pa.count());
00304 for ( int i = 0; i < int(pa.count()); i++ )
00305 dpa[i] = invTransform(pa[i]);
00306
00307 emit selected(dpa);
00308 }
00309
00310 return true;
00311 }
00312
00319 QwtDoubleRect QwtPlotPicker::invTransform(const QRect &rect) const
00320 {
00321 QwtScaleMap xMap = plot()->canvasMap(d_xAxis);
00322 QwtScaleMap yMap = plot()->canvasMap(d_yAxis);
00323
00324 const double left = xMap.invTransform(rect.left());
00325 const double right = xMap.invTransform(rect.right());
00326 const double top = yMap.invTransform(rect.top());
00327 const double bottom = yMap.invTransform(rect.bottom());
00328
00329 return QwtDoubleRect(left, top,
00330 right - left, bottom - top);
00331 }
00332
00338 QRect QwtPlotPicker::transform(const QwtDoubleRect &rect) const
00339 {
00340 QwtScaleMap xMap = plot()->canvasMap(d_xAxis);
00341 QwtScaleMap yMap = plot()->canvasMap(d_yAxis);
00342
00343 const int left = xMap.transform(rect.left());
00344 const int right = xMap.transform(rect.right());
00345 const int top = yMap.transform(rect.top());
00346 const int bottom = yMap.transform(rect.bottom());
00347
00348 return QRect(left, top, right - left, bottom - top);
00349 }
00350
00356 QwtDoublePoint QwtPlotPicker::invTransform(const QPoint &pos) const
00357 {
00358 QwtScaleMap xMap = plot()->canvasMap(d_xAxis);
00359 QwtScaleMap yMap = plot()->canvasMap(d_yAxis);
00360
00361 return QwtDoublePoint(
00362 xMap.invTransform(pos.x()),
00363 yMap.invTransform(pos.y())
00364 );
00365 }
00366
00372 QPoint QwtPlotPicker::transform(const QwtDoublePoint &pos) const
00373 {
00374 QwtScaleMap xMap = plot()->canvasMap(d_xAxis);
00375 QwtScaleMap yMap = plot()->canvasMap(d_yAxis);
00376
00377 return QPoint(
00378 xMap.transform(pos.x()),
00379 yMap.transform(pos.y())
00380 );
00381 }