[4271] | 1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
|
---|
| 2 | * Qwt Widget Library
|
---|
| 3 | * Copyright (C) 1997 Josef Wilgen
|
---|
| 4 | * Copyright (C) 2002 Uwe Rathmann
|
---|
| 5 | *
|
---|
| 6 | * This library is free software; you can redistribute it and/or
|
---|
| 7 | * modify it under the terms of the Qwt License, Version 1.0
|
---|
| 8 | *****************************************************************************/
|
---|
| 9 |
|
---|
| 10 | #include "qwt_plot_curve.h"
|
---|
| 11 | #include "qwt_math.h"
|
---|
| 12 | #include "qwt_clipper.h"
|
---|
| 13 | #include "qwt_painter.h"
|
---|
| 14 | #include "qwt_legend.h"
|
---|
| 15 | #include "qwt_legend_item.h"
|
---|
| 16 | #include "qwt_scale_map.h"
|
---|
| 17 | #include "qwt_plot.h"
|
---|
| 18 | #include "qwt_plot_canvas.h"
|
---|
| 19 | #include "qwt_curve_fitter.h"
|
---|
| 20 | #include "qwt_symbol.h"
|
---|
| 21 | #include <qpainter.h>
|
---|
| 22 | #include <qpixmap.h>
|
---|
| 23 | #include <qalgorithms.h>
|
---|
| 24 | #include <qmath.h>
|
---|
| 25 |
|
---|
| 26 | static int verifyRange( int size, int &i1, int &i2 )
|
---|
| 27 | {
|
---|
| 28 | if ( size < 1 )
|
---|
| 29 | return 0;
|
---|
| 30 |
|
---|
| 31 | i1 = qBound( 0, i1, size - 1 );
|
---|
| 32 | i2 = qBound( 0, i2, size - 1 );
|
---|
| 33 |
|
---|
| 34 | if ( i1 > i2 )
|
---|
| 35 | qSwap( i1, i2 );
|
---|
| 36 |
|
---|
| 37 | return ( i2 - i1 + 1 );
|
---|
| 38 | }
|
---|
| 39 |
|
---|
| 40 | class QwtPlotCurve::PrivateData
|
---|
| 41 | {
|
---|
| 42 | public:
|
---|
| 43 | PrivateData():
|
---|
| 44 | style( QwtPlotCurve::Lines ),
|
---|
| 45 | baseline( 0.0 ),
|
---|
| 46 | symbol( NULL ),
|
---|
| 47 | attributes( 0 ),
|
---|
| 48 | paintAttributes( QwtPlotCurve::ClipPolygons ),
|
---|
| 49 | legendAttributes( 0 )
|
---|
| 50 | {
|
---|
| 51 | pen = QPen( Qt::black );
|
---|
| 52 | curveFitter = new QwtSplineCurveFitter;
|
---|
| 53 | }
|
---|
| 54 |
|
---|
| 55 | ~PrivateData()
|
---|
| 56 | {
|
---|
| 57 | delete symbol;
|
---|
| 58 | delete curveFitter;
|
---|
| 59 | }
|
---|
| 60 |
|
---|
| 61 | QwtPlotCurve::CurveStyle style;
|
---|
| 62 | double baseline;
|
---|
| 63 |
|
---|
| 64 | const QwtSymbol *symbol;
|
---|
| 65 | QwtCurveFitter *curveFitter;
|
---|
| 66 |
|
---|
| 67 | QPen pen;
|
---|
| 68 | QBrush brush;
|
---|
| 69 |
|
---|
| 70 | QwtPlotCurve::CurveAttributes attributes;
|
---|
| 71 | QwtPlotCurve::PaintAttributes paintAttributes;
|
---|
| 72 |
|
---|
| 73 | QwtPlotCurve::LegendAttributes legendAttributes;
|
---|
| 74 | };
|
---|
| 75 |
|
---|
| 76 | /*!
|
---|
| 77 | Constructor
|
---|
| 78 | \param title Title of the curve
|
---|
| 79 | */
|
---|
| 80 | QwtPlotCurve::QwtPlotCurve( const QwtText &title ):
|
---|
| 81 | QwtPlotSeriesItem<QPointF>( title )
|
---|
| 82 | {
|
---|
| 83 | init();
|
---|
| 84 | }
|
---|
| 85 |
|
---|
| 86 | /*!
|
---|
| 87 | Constructor
|
---|
| 88 | \param title Title of the curve
|
---|
| 89 | */
|
---|
| 90 | QwtPlotCurve::QwtPlotCurve( const QString &title ):
|
---|
| 91 | QwtPlotSeriesItem<QPointF>( QwtText( title ) )
|
---|
| 92 | {
|
---|
| 93 | init();
|
---|
| 94 | }
|
---|
| 95 |
|
---|
| 96 | //! Destructor
|
---|
| 97 | QwtPlotCurve::~QwtPlotCurve()
|
---|
| 98 | {
|
---|
| 99 | delete d_data;
|
---|
| 100 | }
|
---|
| 101 |
|
---|
| 102 | //! Initialize internal members
|
---|
| 103 | void QwtPlotCurve::init()
|
---|
| 104 | {
|
---|
| 105 | setItemAttribute( QwtPlotItem::Legend );
|
---|
| 106 | setItemAttribute( QwtPlotItem::AutoScale );
|
---|
| 107 |
|
---|
| 108 | d_data = new PrivateData;
|
---|
| 109 | d_series = new QwtPointSeriesData();
|
---|
| 110 |
|
---|
| 111 | setZ( 20.0 );
|
---|
| 112 | }
|
---|
| 113 |
|
---|
| 114 | //! \return QwtPlotItem::Rtti_PlotCurve
|
---|
| 115 | int QwtPlotCurve::rtti() const
|
---|
| 116 | {
|
---|
| 117 | return QwtPlotItem::Rtti_PlotCurve;
|
---|
| 118 | }
|
---|
| 119 |
|
---|
| 120 | /*!
|
---|
| 121 | Specify an attribute how to draw the curve
|
---|
| 122 |
|
---|
| 123 | \param attribute Paint attribute
|
---|
| 124 | \param on On/Off
|
---|
| 125 | \sa testPaintAttribute()
|
---|
| 126 | */
|
---|
| 127 | void QwtPlotCurve::setPaintAttribute( PaintAttribute attribute, bool on )
|
---|
| 128 | {
|
---|
| 129 | if ( on )
|
---|
| 130 | d_data->paintAttributes |= attribute;
|
---|
| 131 | else
|
---|
| 132 | d_data->paintAttributes &= ~attribute;
|
---|
| 133 | }
|
---|
| 134 |
|
---|
| 135 | /*!
|
---|
| 136 | \brief Return the current paint attributes
|
---|
| 137 | \sa setPaintAttribute()
|
---|
| 138 | */
|
---|
| 139 | bool QwtPlotCurve::testPaintAttribute( PaintAttribute attribute ) const
|
---|
| 140 | {
|
---|
| 141 | return ( d_data->paintAttributes & attribute );
|
---|
| 142 | }
|
---|
| 143 |
|
---|
| 144 | /*!
|
---|
| 145 | Specify an attribute how to draw the legend identifier
|
---|
| 146 |
|
---|
| 147 | \param attribute Attribute
|
---|
| 148 | \param on On/Off
|
---|
| 149 | /sa testLegendAttribute()
|
---|
| 150 | */
|
---|
| 151 | void QwtPlotCurve::setLegendAttribute( LegendAttribute attribute, bool on )
|
---|
| 152 | {
|
---|
| 153 | if ( on )
|
---|
| 154 | d_data->legendAttributes |= attribute;
|
---|
| 155 | else
|
---|
| 156 | d_data->legendAttributes &= ~attribute;
|
---|
| 157 | }
|
---|
| 158 |
|
---|
| 159 | /*!
|
---|
| 160 | \brief Return the current paint attributes
|
---|
| 161 | \sa setLegendAttribute()
|
---|
| 162 | */
|
---|
| 163 | bool QwtPlotCurve::testLegendAttribute( LegendAttribute attribute ) const
|
---|
| 164 | {
|
---|
| 165 | return ( d_data->legendAttributes & attribute );
|
---|
| 166 | }
|
---|
| 167 |
|
---|
| 168 | /*!
|
---|
| 169 | Set the curve's drawing style
|
---|
| 170 |
|
---|
| 171 | \param style Curve style
|
---|
| 172 | \sa style()
|
---|
| 173 | */
|
---|
| 174 | void QwtPlotCurve::setStyle( CurveStyle style )
|
---|
| 175 | {
|
---|
| 176 | if ( style != d_data->style )
|
---|
| 177 | {
|
---|
| 178 | d_data->style = style;
|
---|
| 179 | itemChanged();
|
---|
| 180 | }
|
---|
| 181 | }
|
---|
| 182 |
|
---|
| 183 | /*!
|
---|
| 184 | Return the current style
|
---|
| 185 | \sa setStyle()
|
---|
| 186 | */
|
---|
| 187 | QwtPlotCurve::CurveStyle QwtPlotCurve::style() const
|
---|
| 188 | {
|
---|
| 189 | return d_data->style;
|
---|
| 190 | }
|
---|
| 191 |
|
---|
| 192 | /*!
|
---|
| 193 | Assign a symbol
|
---|
| 194 |
|
---|
| 195 | \param symbol Symbol
|
---|
| 196 | \sa symbol()
|
---|
| 197 | */
|
---|
| 198 | void QwtPlotCurve::setSymbol( const QwtSymbol *symbol )
|
---|
| 199 | {
|
---|
| 200 | if ( symbol != d_data->symbol )
|
---|
| 201 | {
|
---|
| 202 | delete d_data->symbol;
|
---|
| 203 | d_data->symbol = symbol;
|
---|
| 204 | itemChanged();
|
---|
| 205 | }
|
---|
| 206 | }
|
---|
| 207 |
|
---|
| 208 | /*!
|
---|
| 209 | \return Current symbol or NULL, when no symbol has been assigned
|
---|
| 210 | \sa setSymbol()
|
---|
| 211 | */
|
---|
| 212 | const QwtSymbol *QwtPlotCurve::symbol() const
|
---|
| 213 | {
|
---|
| 214 | return d_data->symbol;
|
---|
| 215 | }
|
---|
| 216 |
|
---|
| 217 | /*!
|
---|
| 218 | Assign a pen
|
---|
| 219 |
|
---|
| 220 | \param pen New pen
|
---|
| 221 | \sa pen(), brush()
|
---|
| 222 | */
|
---|
| 223 | void QwtPlotCurve::setPen( const QPen &pen )
|
---|
| 224 | {
|
---|
| 225 | if ( pen != d_data->pen )
|
---|
| 226 | {
|
---|
| 227 | d_data->pen = pen;
|
---|
| 228 | itemChanged();
|
---|
| 229 | }
|
---|
| 230 | }
|
---|
| 231 |
|
---|
| 232 | /*!
|
---|
| 233 | \return Pen used to draw the lines
|
---|
| 234 | \sa setPen(), brush()
|
---|
| 235 | */
|
---|
| 236 | const QPen& QwtPlotCurve::pen() const
|
---|
| 237 | {
|
---|
| 238 | return d_data->pen;
|
---|
| 239 | }
|
---|
| 240 |
|
---|
| 241 | /*!
|
---|
| 242 | \brief Assign a brush.
|
---|
| 243 |
|
---|
| 244 | In case of brush.style() != QBrush::NoBrush
|
---|
| 245 | and style() != QwtPlotCurve::Sticks
|
---|
| 246 | the area between the curve and the baseline will be filled.
|
---|
| 247 |
|
---|
| 248 | In case !brush.color().isValid() the area will be filled by
|
---|
| 249 | pen.color(). The fill algorithm simply connects the first and the
|
---|
| 250 | last curve point to the baseline. So the curve data has to be sorted
|
---|
| 251 | (ascending or descending).
|
---|
| 252 |
|
---|
| 253 | \param brush New brush
|
---|
| 254 | \sa brush(), setBaseline(), baseline()
|
---|
| 255 | */
|
---|
| 256 | void QwtPlotCurve::setBrush( const QBrush &brush )
|
---|
| 257 | {
|
---|
| 258 | if ( brush != d_data->brush )
|
---|
| 259 | {
|
---|
| 260 | d_data->brush = brush;
|
---|
| 261 | itemChanged();
|
---|
| 262 | }
|
---|
| 263 | }
|
---|
| 264 |
|
---|
| 265 | /*!
|
---|
| 266 | \return Brush used to fill the area between lines and the baseline
|
---|
| 267 | \sa setBrush(), setBaseline(), baseline()
|
---|
| 268 | */
|
---|
| 269 | const QBrush& QwtPlotCurve::brush() const
|
---|
| 270 | {
|
---|
| 271 | return d_data->brush;
|
---|
| 272 | }
|
---|
| 273 |
|
---|
| 274 | /*!
|
---|
| 275 | Draw an interval of the curve
|
---|
| 276 |
|
---|
| 277 | \param painter Painter
|
---|
| 278 | \param xMap Maps x-values into pixel coordinates.
|
---|
| 279 | \param yMap Maps y-values into pixel coordinates.
|
---|
| 280 | \param canvasRect Contents rect of the canvas
|
---|
| 281 | \param from Index of the first point to be painted
|
---|
| 282 | \param to Index of the last point to be painted. If to < 0 the
|
---|
| 283 | curve will be painted to its last point.
|
---|
| 284 |
|
---|
| 285 | \sa drawCurve(), drawSymbols(),
|
---|
| 286 | */
|
---|
| 287 | void QwtPlotCurve::drawSeries( QPainter *painter,
|
---|
| 288 | const QwtScaleMap &xMap, const QwtScaleMap &yMap,
|
---|
| 289 | const QRectF &canvasRect, int from, int to ) const
|
---|
| 290 | {
|
---|
| 291 | if ( !painter || dataSize() <= 0 )
|
---|
| 292 | return;
|
---|
| 293 |
|
---|
| 294 | if ( to < 0 )
|
---|
| 295 | to = dataSize() - 1;
|
---|
| 296 |
|
---|
| 297 | if ( verifyRange( dataSize(), from, to ) > 0 )
|
---|
| 298 | {
|
---|
| 299 | painter->save();
|
---|
| 300 | painter->setPen( d_data->pen );
|
---|
| 301 |
|
---|
| 302 | /*
|
---|
| 303 | Qt 4.0.0 is slow when drawing lines, but it's even
|
---|
| 304 | slower when the painter has a brush. So we don't
|
---|
| 305 | set the brush before we really need it.
|
---|
| 306 | */
|
---|
| 307 |
|
---|
| 308 | drawCurve( painter, d_data->style, xMap, yMap, canvasRect, from, to );
|
---|
| 309 | painter->restore();
|
---|
| 310 |
|
---|
| 311 | if ( d_data->symbol &&
|
---|
| 312 | ( d_data->symbol->style() != QwtSymbol::NoSymbol ) )
|
---|
| 313 | {
|
---|
| 314 | painter->save();
|
---|
| 315 | drawSymbols( painter, *d_data->symbol,
|
---|
| 316 | xMap, yMap, canvasRect, from, to );
|
---|
| 317 | painter->restore();
|
---|
| 318 | }
|
---|
| 319 | }
|
---|
| 320 | }
|
---|
| 321 |
|
---|
| 322 | /*!
|
---|
| 323 | \brief Draw the line part (without symbols) of a curve interval.
|
---|
| 324 | \param painter Painter
|
---|
| 325 | \param style curve style, see QwtPlotCurve::CurveStyle
|
---|
| 326 | \param xMap x map
|
---|
| 327 | \param yMap y map
|
---|
| 328 | \param canvasRect Contents rect of the canvas
|
---|
| 329 | \param from index of the first point to be painted
|
---|
| 330 | \param to index of the last point to be painted
|
---|
| 331 | \sa draw(), drawDots(), drawLines(), drawSteps(), drawSticks()
|
---|
| 332 | */
|
---|
| 333 | void QwtPlotCurve::drawCurve( QPainter *painter, int style,
|
---|
| 334 | const QwtScaleMap &xMap, const QwtScaleMap &yMap,
|
---|
| 335 | const QRectF &canvasRect, int from, int to ) const
|
---|
| 336 | {
|
---|
| 337 | switch ( style )
|
---|
| 338 | {
|
---|
| 339 | case Lines:
|
---|
| 340 | if ( testCurveAttribute( Fitted ) )
|
---|
| 341 | {
|
---|
| 342 | // we always need the complete
|
---|
| 343 | // curve for fitting
|
---|
| 344 | from = 0;
|
---|
| 345 | to = dataSize() - 1;
|
---|
| 346 | }
|
---|
| 347 | drawLines( painter, xMap, yMap, canvasRect, from, to );
|
---|
| 348 | break;
|
---|
| 349 | case Sticks:
|
---|
| 350 | drawSticks( painter, xMap, yMap, canvasRect, from, to );
|
---|
| 351 | break;
|
---|
| 352 | case Steps:
|
---|
| 353 | drawSteps( painter, xMap, yMap, canvasRect, from, to );
|
---|
| 354 | break;
|
---|
| 355 | case Dots:
|
---|
| 356 | drawDots( painter, xMap, yMap, canvasRect, from, to );
|
---|
| 357 | break;
|
---|
| 358 | case NoCurve:
|
---|
| 359 | default:
|
---|
| 360 | break;
|
---|
| 361 | }
|
---|
| 362 | }
|
---|
| 363 |
|
---|
| 364 | /*!
|
---|
| 365 | \brief Draw lines
|
---|
| 366 |
|
---|
| 367 | If the CurveAttribute Fitted is enabled a QwtCurveFitter tries
|
---|
| 368 | to interpolate/smooth the curve, before it is painted.
|
---|
| 369 |
|
---|
| 370 | \param painter Painter
|
---|
| 371 | \param xMap x map
|
---|
| 372 | \param yMap y map
|
---|
| 373 | \param canvasRect Contents rect of the canvas
|
---|
| 374 | \param from index of the first point to be painted
|
---|
| 375 | \param to index of the last point to be painted
|
---|
| 376 |
|
---|
| 377 | \sa setCurveAttribute(), setCurveFitter(), draw(),
|
---|
| 378 | drawLines(), drawDots(), drawSteps(), drawSticks()
|
---|
| 379 | */
|
---|
| 380 | void QwtPlotCurve::drawLines( QPainter *painter,
|
---|
| 381 | const QwtScaleMap &xMap, const QwtScaleMap &yMap,
|
---|
| 382 | const QRectF &canvasRect, int from, int to ) const
|
---|
| 383 | {
|
---|
| 384 | int size = to - from + 1;
|
---|
| 385 | if ( size <= 0 )
|
---|
| 386 | return;
|
---|
| 387 |
|
---|
| 388 | const bool doAlign = QwtPainter::roundingAlignment( painter );
|
---|
| 389 |
|
---|
| 390 | QPolygonF polyline( size );
|
---|
| 391 |
|
---|
| 392 | QPointF *points = polyline.data();
|
---|
| 393 | for ( int i = from; i <= to; i++ )
|
---|
| 394 | {
|
---|
| 395 | const QPointF sample = d_series->sample( i );
|
---|
| 396 |
|
---|
| 397 | double x = xMap.transform( sample.x() );
|
---|
| 398 | double y = yMap.transform( sample.y() );
|
---|
| 399 | if ( doAlign )
|
---|
| 400 | {
|
---|
| 401 | x = qRound( x );
|
---|
| 402 | y = qRound( y );
|
---|
| 403 | }
|
---|
| 404 |
|
---|
| 405 | points[i - from].rx() = x;
|
---|
| 406 | points[i - from].ry() = y;
|
---|
| 407 | }
|
---|
| 408 |
|
---|
| 409 | if ( ( d_data->attributes & Fitted ) && d_data->curveFitter )
|
---|
| 410 | polyline = d_data->curveFitter->fitCurve( polyline );
|
---|
| 411 |
|
---|
| 412 | if ( d_data->paintAttributes & ClipPolygons )
|
---|
| 413 | {
|
---|
| 414 | qreal pw = qMax( qreal( 1.0 ), painter->pen().widthF());
|
---|
| 415 | const QPolygonF clipped = QwtClipper::clipPolygonF(
|
---|
| 416 | canvasRect.adjusted(-pw, -pw, pw, pw), polyline, false );
|
---|
| 417 |
|
---|
| 418 | QwtPainter::drawPolyline( painter, clipped );
|
---|
| 419 | }
|
---|
| 420 | else
|
---|
| 421 | {
|
---|
| 422 | QwtPainter::drawPolyline( painter, polyline );
|
---|
| 423 | }
|
---|
| 424 |
|
---|
| 425 | if ( d_data->brush.style() != Qt::NoBrush )
|
---|
| 426 | fillCurve( painter, xMap, yMap, canvasRect, polyline );
|
---|
| 427 | }
|
---|
| 428 |
|
---|
| 429 | /*!
|
---|
| 430 | Draw sticks
|
---|
| 431 |
|
---|
| 432 | \param painter Painter
|
---|
| 433 | \param xMap x map
|
---|
| 434 | \param yMap y map
|
---|
| 435 | \param canvasRect Contents rect of the canvas
|
---|
| 436 | \param from index of the first point to be painted
|
---|
| 437 | \param to index of the last point to be painted
|
---|
| 438 |
|
---|
| 439 | \sa draw(), drawCurve(), drawDots(), drawLines(), drawSteps()
|
---|
| 440 | */
|
---|
| 441 | void QwtPlotCurve::drawSticks( QPainter *painter,
|
---|
| 442 | const QwtScaleMap &xMap, const QwtScaleMap &yMap,
|
---|
| 443 | const QRectF &, int from, int to ) const
|
---|
| 444 | {
|
---|
| 445 | painter->save();
|
---|
| 446 | painter->setRenderHint( QPainter::Antialiasing, false );
|
---|
| 447 |
|
---|
| 448 | const bool doAlign = QwtPainter::roundingAlignment( painter );
|
---|
| 449 |
|
---|
| 450 | double x0 = xMap.transform( d_data->baseline );
|
---|
| 451 | double y0 = yMap.transform( d_data->baseline );
|
---|
| 452 | if ( doAlign )
|
---|
| 453 | {
|
---|
| 454 | x0 = qRound( x0 );
|
---|
| 455 | y0 = qRound( y0 );
|
---|
| 456 | }
|
---|
| 457 |
|
---|
| 458 | const Qt::Orientation o = orientation();
|
---|
| 459 |
|
---|
| 460 | for ( int i = from; i <= to; i++ )
|
---|
| 461 | {
|
---|
| 462 | const QPointF sample = d_series->sample( i );
|
---|
| 463 | double xi = xMap.transform( sample.x() );
|
---|
| 464 | double yi = yMap.transform( sample.y() );
|
---|
| 465 | if ( doAlign )
|
---|
| 466 | {
|
---|
| 467 | xi = qRound( xi );
|
---|
| 468 | yi = qRound( yi );
|
---|
| 469 | }
|
---|
| 470 |
|
---|
| 471 | if ( o == Qt::Horizontal )
|
---|
| 472 | QwtPainter::drawLine( painter, x0, yi, xi, yi );
|
---|
| 473 | else
|
---|
| 474 | QwtPainter::drawLine( painter, xi, y0, xi, yi );
|
---|
| 475 | }
|
---|
| 476 |
|
---|
| 477 | painter->restore();
|
---|
| 478 | }
|
---|
| 479 |
|
---|
| 480 | /*!
|
---|
| 481 | Draw dots
|
---|
| 482 |
|
---|
| 483 | \param painter Painter
|
---|
| 484 | \param xMap x map
|
---|
| 485 | \param yMap y map
|
---|
| 486 | \param canvasRect Contents rect of the canvas
|
---|
| 487 | \param from index of the first point to be painted
|
---|
| 488 | \param to index of the last point to be painted
|
---|
| 489 |
|
---|
| 490 | \sa draw(), drawCurve(), drawSticks(), drawLines(), drawSteps()
|
---|
| 491 | */
|
---|
| 492 | void QwtPlotCurve::drawDots( QPainter *painter,
|
---|
| 493 | const QwtScaleMap &xMap, const QwtScaleMap &yMap,
|
---|
| 494 | const QRectF &canvasRect, int from, int to ) const
|
---|
| 495 | {
|
---|
| 496 | const bool doFill = d_data->brush.style() != Qt::NoBrush;
|
---|
| 497 | const bool doAlign = QwtPainter::roundingAlignment( painter );
|
---|
| 498 |
|
---|
| 499 | QPolygonF polyline;
|
---|
| 500 | if ( doFill )
|
---|
| 501 | polyline.resize( to - from + 1 );
|
---|
| 502 |
|
---|
| 503 | QPointF *points = polyline.data();
|
---|
| 504 |
|
---|
| 505 | for ( int i = from; i <= to; i++ )
|
---|
| 506 | {
|
---|
| 507 | const QPointF sample = d_series->sample( i );
|
---|
| 508 | double xi = xMap.transform( sample.x() );
|
---|
| 509 | double yi = yMap.transform( sample.y() );
|
---|
| 510 | if ( doAlign )
|
---|
| 511 | {
|
---|
| 512 | xi = qRound( xi );
|
---|
| 513 | yi = qRound( yi );
|
---|
| 514 | }
|
---|
| 515 |
|
---|
| 516 | QwtPainter::drawPoint( painter, QPointF( xi, yi ) );
|
---|
| 517 |
|
---|
| 518 | if ( doFill )
|
---|
| 519 | {
|
---|
| 520 | points[i - from].rx() = xi;
|
---|
| 521 | points[i - from].ry() = yi;
|
---|
| 522 | }
|
---|
| 523 | }
|
---|
| 524 |
|
---|
| 525 | if ( doFill )
|
---|
| 526 | fillCurve( painter, xMap, yMap, canvasRect, polyline );
|
---|
| 527 | }
|
---|
| 528 |
|
---|
| 529 | /*!
|
---|
| 530 | Draw step function
|
---|
| 531 |
|
---|
| 532 | The direction of the steps depends on Inverted attribute.
|
---|
| 533 |
|
---|
| 534 | \param painter Painter
|
---|
| 535 | \param xMap x map
|
---|
| 536 | \param yMap y map
|
---|
| 537 | \param canvasRect Contents rect of the canvas
|
---|
| 538 | \param from index of the first point to be painted
|
---|
| 539 | \param to index of the last point to be painted
|
---|
| 540 |
|
---|
| 541 | \sa CurveAttribute, setCurveAttribute(),
|
---|
| 542 | draw(), drawCurve(), drawDots(), drawLines(), drawSticks()
|
---|
| 543 | */
|
---|
| 544 | void QwtPlotCurve::drawSteps( QPainter *painter,
|
---|
| 545 | const QwtScaleMap &xMap, const QwtScaleMap &yMap,
|
---|
| 546 | const QRectF &canvasRect, int from, int to ) const
|
---|
| 547 | {
|
---|
| 548 | const bool doAlign = QwtPainter::roundingAlignment( painter );
|
---|
| 549 |
|
---|
| 550 | QPolygonF polygon( 2 * ( to - from ) + 1 );
|
---|
| 551 | QPointF *points = polygon.data();
|
---|
| 552 |
|
---|
| 553 | bool inverted = orientation() == Qt::Vertical;
|
---|
| 554 | if ( d_data->attributes & Inverted )
|
---|
| 555 | inverted = !inverted;
|
---|
| 556 |
|
---|
| 557 | int i, ip;
|
---|
| 558 | for ( i = from, ip = 0; i <= to; i++, ip += 2 )
|
---|
| 559 | {
|
---|
| 560 | const QPointF sample = d_series->sample( i );
|
---|
| 561 | double xi = xMap.transform( sample.x() );
|
---|
| 562 | double yi = yMap.transform( sample.y() );
|
---|
| 563 | if ( doAlign )
|
---|
| 564 | {
|
---|
| 565 | xi = qRound( xi );
|
---|
| 566 | yi = qRound( yi );
|
---|
| 567 | }
|
---|
| 568 |
|
---|
| 569 | if ( ip > 0 )
|
---|
| 570 | {
|
---|
| 571 | const QPointF &p0 = points[ip - 2];
|
---|
| 572 | QPointF &p = points[ip - 1];
|
---|
| 573 |
|
---|
| 574 | if ( inverted )
|
---|
| 575 | {
|
---|
| 576 | p.rx() = p0.x();
|
---|
| 577 | p.ry() = yi;
|
---|
| 578 | }
|
---|
| 579 | else
|
---|
| 580 | {
|
---|
| 581 | p.rx() = xi;
|
---|
| 582 | p.ry() = p0.y();
|
---|
| 583 | }
|
---|
| 584 | }
|
---|
| 585 |
|
---|
| 586 | points[ip].rx() = xi;
|
---|
| 587 | points[ip].ry() = yi;
|
---|
| 588 | }
|
---|
| 589 |
|
---|
| 590 | if ( d_data->paintAttributes & ClipPolygons )
|
---|
| 591 | {
|
---|
| 592 | const QPolygonF clipped = QwtClipper::clipPolygonF(
|
---|
| 593 | canvasRect, polygon, false );
|
---|
| 594 |
|
---|
| 595 | QwtPainter::drawPolyline( painter, clipped );
|
---|
| 596 | }
|
---|
| 597 | else
|
---|
| 598 | {
|
---|
| 599 | QwtPainter::drawPolyline( painter, polygon );
|
---|
| 600 | }
|
---|
| 601 |
|
---|
| 602 | if ( d_data->brush.style() != Qt::NoBrush )
|
---|
| 603 | fillCurve( painter, xMap, yMap, canvasRect, polygon );
|
---|
| 604 | }
|
---|
| 605 |
|
---|
| 606 |
|
---|
| 607 | /*!
|
---|
| 608 | Specify an attribute for drawing the curve
|
---|
| 609 |
|
---|
| 610 | \param attribute Curve attribute
|
---|
| 611 | \param on On/Off
|
---|
| 612 |
|
---|
| 613 | /sa testCurveAttribute(), setCurveFitter()
|
---|
| 614 | */
|
---|
| 615 | void QwtPlotCurve::setCurveAttribute( CurveAttribute attribute, bool on )
|
---|
| 616 | {
|
---|
| 617 | if ( bool( d_data->attributes & attribute ) == on )
|
---|
| 618 | return;
|
---|
| 619 |
|
---|
| 620 | if ( on )
|
---|
| 621 | d_data->attributes |= attribute;
|
---|
| 622 | else
|
---|
| 623 | d_data->attributes &= ~attribute;
|
---|
| 624 |
|
---|
| 625 | itemChanged();
|
---|
| 626 | }
|
---|
| 627 |
|
---|
| 628 | /*!
|
---|
| 629 | \return true, if attribute is enabled
|
---|
| 630 | \sa setCurveAttribute()
|
---|
| 631 | */
|
---|
| 632 | bool QwtPlotCurve::testCurveAttribute( CurveAttribute attribute ) const
|
---|
| 633 | {
|
---|
| 634 | return d_data->attributes & attribute;
|
---|
| 635 | }
|
---|
| 636 |
|
---|
| 637 | /*!
|
---|
| 638 | Assign a curve fitter
|
---|
| 639 |
|
---|
| 640 | The curve fitter "smooths" the curve points, when the Fitted
|
---|
| 641 | CurveAttribute is set. setCurveFitter(NULL) also disables curve fitting.
|
---|
| 642 |
|
---|
| 643 | The curve fitter operates on the translated points ( = widget coordinates)
|
---|
| 644 | to be functional for logarithmic scales. Obviously this is less performant
|
---|
| 645 | for fitting algorithms, that reduce the number of points.
|
---|
| 646 |
|
---|
| 647 | For situations, where curve fitting is used to improve the performance
|
---|
| 648 | of painting huge series of points it might be better to execute the fitter
|
---|
| 649 | on the curve points once and to cache the result in the QwtSeriesData object.
|
---|
| 650 |
|
---|
| 651 | \param curveFitter() Curve fitter
|
---|
| 652 | \sa Fitted
|
---|
| 653 | */
|
---|
| 654 | void QwtPlotCurve::setCurveFitter( QwtCurveFitter *curveFitter )
|
---|
| 655 | {
|
---|
| 656 | delete d_data->curveFitter;
|
---|
| 657 | d_data->curveFitter = curveFitter;
|
---|
| 658 |
|
---|
| 659 | itemChanged();
|
---|
| 660 | }
|
---|
| 661 |
|
---|
| 662 | /*!
|
---|
| 663 | Get the curve fitter. If curve fitting is disabled NULL is returned.
|
---|
| 664 |
|
---|
| 665 | \return Curve fitter
|
---|
| 666 | \sa setCurveFitter(), Fitted
|
---|
| 667 | */
|
---|
| 668 | QwtCurveFitter *QwtPlotCurve::curveFitter() const
|
---|
| 669 | {
|
---|
| 670 | return d_data->curveFitter;
|
---|
| 671 | }
|
---|
| 672 |
|
---|
| 673 | /*!
|
---|
| 674 | Fill the area between the curve and the baseline with
|
---|
| 675 | the curve brush
|
---|
| 676 |
|
---|
| 677 | \param painter Painter
|
---|
| 678 | \param xMap x map
|
---|
| 679 | \param yMap y map
|
---|
| 680 | \param canvasRect Contents rect of the canvas
|
---|
| 681 | \param polygon Polygon - will be modified !
|
---|
| 682 |
|
---|
| 683 | \sa setBrush(), setBaseline(), setStyle()
|
---|
| 684 | */
|
---|
| 685 | void QwtPlotCurve::fillCurve( QPainter *painter,
|
---|
| 686 | const QwtScaleMap &xMap, const QwtScaleMap &yMap,
|
---|
| 687 | const QRectF &canvasRect, QPolygonF &polygon ) const
|
---|
| 688 | {
|
---|
| 689 | if ( d_data->brush.style() == Qt::NoBrush )
|
---|
| 690 | return;
|
---|
| 691 |
|
---|
| 692 | closePolyline( painter, xMap, yMap, polygon );
|
---|
| 693 | if ( polygon.count() <= 2 ) // a line can't be filled
|
---|
| 694 | return;
|
---|
| 695 |
|
---|
| 696 | QBrush brush = d_data->brush;
|
---|
| 697 | if ( !brush.color().isValid() )
|
---|
| 698 | brush.setColor( d_data->pen.color() );
|
---|
| 699 |
|
---|
| 700 | if ( d_data->paintAttributes & ClipPolygons )
|
---|
| 701 | polygon = QwtClipper::clipPolygonF( canvasRect, polygon, true );
|
---|
| 702 |
|
---|
| 703 | painter->save();
|
---|
| 704 |
|
---|
| 705 | painter->setPen( Qt::NoPen );
|
---|
| 706 | painter->setBrush( brush );
|
---|
| 707 |
|
---|
| 708 | QwtPainter::drawPolygon( painter, polygon );
|
---|
| 709 |
|
---|
| 710 | painter->restore();
|
---|
| 711 | }
|
---|
| 712 |
|
---|
| 713 | /*!
|
---|
| 714 | \brief Complete a polygon to be a closed polygon including the
|
---|
| 715 | area between the original polygon and the baseline.
|
---|
| 716 |
|
---|
| 717 | \param painter Painter
|
---|
| 718 | \param xMap X map
|
---|
| 719 | \param yMap Y map
|
---|
| 720 | \param polygon Polygon to be completed
|
---|
| 721 | */
|
---|
| 722 | void QwtPlotCurve::closePolyline( QPainter *painter,
|
---|
| 723 | const QwtScaleMap &xMap, const QwtScaleMap &yMap,
|
---|
| 724 | QPolygonF &polygon ) const
|
---|
| 725 | {
|
---|
| 726 | if ( polygon.size() < 2 )
|
---|
| 727 | return;
|
---|
| 728 |
|
---|
| 729 | const bool doAlign = QwtPainter::roundingAlignment( painter );
|
---|
| 730 |
|
---|
| 731 | double baseline = d_data->baseline;
|
---|
| 732 |
|
---|
| 733 | if ( orientation() == Qt::Vertical )
|
---|
| 734 | {
|
---|
| 735 | if ( yMap.transformation()->type() == QwtScaleTransformation::Log10 )
|
---|
| 736 | {
|
---|
| 737 | if ( baseline < QwtScaleMap::LogMin )
|
---|
| 738 | baseline = QwtScaleMap::LogMin;
|
---|
| 739 | }
|
---|
| 740 |
|
---|
| 741 | double refY = yMap.transform( baseline );
|
---|
| 742 | if ( doAlign )
|
---|
| 743 | refY = qRound( refY );
|
---|
| 744 |
|
---|
| 745 | polygon += QPointF( polygon.last().x(), refY );
|
---|
| 746 | polygon += QPointF( polygon.first().x(), refY );
|
---|
| 747 | }
|
---|
| 748 | else
|
---|
| 749 | {
|
---|
| 750 | if ( xMap.transformation()->type() == QwtScaleTransformation::Log10 )
|
---|
| 751 | {
|
---|
| 752 | if ( baseline < QwtScaleMap::LogMin )
|
---|
| 753 | baseline = QwtScaleMap::LogMin;
|
---|
| 754 | }
|
---|
| 755 |
|
---|
| 756 | double refX = xMap.transform( baseline );
|
---|
| 757 | if ( doAlign )
|
---|
| 758 | refX = qRound( refX );
|
---|
| 759 |
|
---|
| 760 | polygon += QPointF( refX, polygon.last().y() );
|
---|
| 761 | polygon += QPointF( refX, polygon.first().y() );
|
---|
| 762 | }
|
---|
| 763 | }
|
---|
| 764 |
|
---|
| 765 | /*!
|
---|
| 766 | Draw symbols
|
---|
| 767 |
|
---|
| 768 | \param painter Painter
|
---|
| 769 | \param symbol Curve symbol
|
---|
| 770 | \param xMap x map
|
---|
| 771 | \param yMap y map
|
---|
| 772 | \param canvasRect Contents rect of the canvas
|
---|
| 773 | \param from Index of the first point to be painted
|
---|
| 774 | \param to Index of the last point to be painted
|
---|
| 775 |
|
---|
| 776 | \sa setSymbol(), drawSeries(), drawCurve()
|
---|
| 777 | */
|
---|
| 778 | void QwtPlotCurve::drawSymbols( QPainter *painter, const QwtSymbol &symbol,
|
---|
| 779 | const QwtScaleMap &xMap, const QwtScaleMap &yMap,
|
---|
| 780 | const QRectF &canvasRect, int from, int to ) const
|
---|
| 781 | {
|
---|
| 782 | const bool doAlign = QwtPainter::roundingAlignment( painter );
|
---|
| 783 |
|
---|
| 784 | bool usePixmap = testPaintAttribute( CacheSymbols );
|
---|
| 785 | if ( usePixmap && !doAlign )
|
---|
| 786 | {
|
---|
| 787 | // Don't use the pixmap, when the paint device
|
---|
| 788 | // could generate scalable vectors
|
---|
| 789 |
|
---|
| 790 | usePixmap = false;
|
---|
| 791 | }
|
---|
| 792 |
|
---|
| 793 | if ( usePixmap )
|
---|
| 794 | {
|
---|
| 795 | QPixmap pm( symbol.boundingSize() );
|
---|
| 796 | pm.fill( Qt::transparent );
|
---|
| 797 |
|
---|
| 798 | const double pw2 = 0.5 * pm.width();
|
---|
| 799 | const double ph2 = 0.5 * pm.height();
|
---|
| 800 |
|
---|
| 801 | QPainter p( &pm );
|
---|
| 802 | p.setRenderHints( painter->renderHints() );
|
---|
| 803 | symbol.drawSymbol( &p, QPointF( pw2, ph2 ) );
|
---|
| 804 | p.end();
|
---|
| 805 |
|
---|
| 806 | for ( int i = from; i <= to; i++ )
|
---|
| 807 | {
|
---|
| 808 | const QPointF sample = d_series->sample( i );
|
---|
| 809 |
|
---|
| 810 | double xi = xMap.transform( sample.x() );
|
---|
| 811 | double yi = yMap.transform( sample.y() );
|
---|
| 812 | if ( doAlign )
|
---|
| 813 | {
|
---|
| 814 | xi = qRound( xi );
|
---|
| 815 | yi = qRound( yi );
|
---|
| 816 | }
|
---|
| 817 |
|
---|
| 818 | if ( canvasRect.contains( xi, yi ) )
|
---|
| 819 | {
|
---|
| 820 | const int left = qCeil( xi ) - pw2;
|
---|
| 821 | const int top = qCeil( yi ) - ph2;
|
---|
| 822 |
|
---|
| 823 | painter->drawPixmap( left, top, pm );
|
---|
| 824 | }
|
---|
| 825 | }
|
---|
| 826 | }
|
---|
| 827 | else
|
---|
| 828 | {
|
---|
| 829 | const int chunkSize = 500;
|
---|
| 830 |
|
---|
| 831 | for ( int i = from; i <= to; i += chunkSize )
|
---|
| 832 | {
|
---|
| 833 | const int n = qMin( chunkSize, to - i + 1 );
|
---|
| 834 |
|
---|
| 835 | QPolygonF points;
|
---|
| 836 | for ( int j = 0; j < n; j++ )
|
---|
| 837 | {
|
---|
| 838 | const QPointF sample = d_series->sample( i + j );
|
---|
| 839 |
|
---|
| 840 | const double xi = xMap.transform( sample.x() );
|
---|
| 841 | const double yi = yMap.transform( sample.y() );
|
---|
| 842 |
|
---|
| 843 | if ( canvasRect.contains( xi, yi ) )
|
---|
| 844 | points += QPointF( xi, yi );
|
---|
| 845 | }
|
---|
| 846 |
|
---|
| 847 | if ( points.size() > 0 )
|
---|
| 848 | symbol.drawSymbols( painter, points );
|
---|
| 849 | }
|
---|
| 850 | }
|
---|
| 851 | }
|
---|
| 852 |
|
---|
| 853 | /*!
|
---|
| 854 | \brief Set the value of the baseline
|
---|
| 855 |
|
---|
| 856 | The baseline is needed for filling the curve with a brush or
|
---|
| 857 | the Sticks drawing style.
|
---|
| 858 | The interpretation of the baseline depends on the CurveType.
|
---|
| 859 | With QwtPlotCurve::Yfx, the baseline is interpreted as a horizontal line
|
---|
| 860 | at y = baseline(), with QwtPlotCurve::Yfy, it is interpreted as a vertical
|
---|
| 861 | line at x = baseline().
|
---|
| 862 |
|
---|
| 863 | The default value is 0.0.
|
---|
| 864 |
|
---|
| 865 | \param value Value of the baseline
|
---|
| 866 | \sa baseline(), setBrush(), setStyle(), setStyle()
|
---|
| 867 | */
|
---|
| 868 | void QwtPlotCurve::setBaseline( double value )
|
---|
| 869 | {
|
---|
| 870 | if ( d_data->baseline != value )
|
---|
| 871 | {
|
---|
| 872 | d_data->baseline = value;
|
---|
| 873 | itemChanged();
|
---|
| 874 | }
|
---|
| 875 | }
|
---|
| 876 |
|
---|
| 877 | /*!
|
---|
| 878 | \return Value of the baseline
|
---|
| 879 | \sa setBaseline()
|
---|
| 880 | */
|
---|
| 881 | double QwtPlotCurve::baseline() const
|
---|
| 882 | {
|
---|
| 883 | return d_data->baseline;
|
---|
| 884 | }
|
---|
| 885 |
|
---|
| 886 | /*!
|
---|
| 887 | Find the closest curve point for a specific position
|
---|
| 888 |
|
---|
| 889 | \param pos Position, where to look for the closest curve point
|
---|
| 890 | \param dist If dist != NULL, closestPoint() returns the distance between
|
---|
| 891 | the position and the clostest curve point
|
---|
| 892 | \return Index of the closest curve point, or -1 if none can be found
|
---|
| 893 | ( f.e when the curve has no points )
|
---|
| 894 | \note closestPoint() implements a dumb algorithm, that iterates
|
---|
| 895 | over all points
|
---|
| 896 | */
|
---|
| 897 | int QwtPlotCurve::closestPoint( const QPoint &pos, double *dist ) const
|
---|
| 898 | {
|
---|
| 899 | if ( plot() == NULL || dataSize() <= 0 )
|
---|
| 900 | return -1;
|
---|
| 901 |
|
---|
| 902 | const QwtScaleMap xMap = plot()->canvasMap( xAxis() );
|
---|
| 903 | const QwtScaleMap yMap = plot()->canvasMap( yAxis() );
|
---|
| 904 |
|
---|
| 905 | int index = -1;
|
---|
| 906 | double dmin = 1.0e10;
|
---|
| 907 |
|
---|
| 908 | for ( uint i = 0; i < dataSize(); i++ )
|
---|
| 909 | {
|
---|
| 910 | const QPointF sample = d_series->sample( i );
|
---|
| 911 |
|
---|
| 912 | const double cx = xMap.transform( sample.x() ) - pos.x();
|
---|
| 913 | const double cy = yMap.transform( sample.y() ) - pos.y();
|
---|
| 914 |
|
---|
| 915 | const double f = qwtSqr( cx ) + qwtSqr( cy );
|
---|
| 916 | if ( f < dmin )
|
---|
| 917 | {
|
---|
| 918 | index = i;
|
---|
| 919 | dmin = f;
|
---|
| 920 | }
|
---|
| 921 | }
|
---|
| 922 | if ( dist )
|
---|
| 923 | *dist = qSqrt( dmin );
|
---|
| 924 |
|
---|
| 925 | return index;
|
---|
| 926 | }
|
---|
| 927 |
|
---|
| 928 | /*!
|
---|
| 929 | \brief Update the widget that represents the item on the legend
|
---|
| 930 |
|
---|
| 931 | \param legend Legend
|
---|
| 932 | \sa drawLegendIdentifier(), legendItem(), QwtPlotItem::Legend
|
---|
| 933 | */
|
---|
| 934 | void QwtPlotCurve::updateLegend( QwtLegend *legend ) const
|
---|
| 935 | {
|
---|
| 936 | if ( legend && testItemAttribute( QwtPlotItem::Legend )
|
---|
| 937 | && ( d_data->legendAttributes & QwtPlotCurve::LegendShowSymbol )
|
---|
| 938 | && d_data->symbol
|
---|
| 939 | && d_data->symbol->style() != QwtSymbol::NoSymbol )
|
---|
| 940 | {
|
---|
| 941 | QWidget *lgdItem = legend->find( this );
|
---|
| 942 | if ( lgdItem == NULL )
|
---|
| 943 | {
|
---|
| 944 | lgdItem = legendItem();
|
---|
| 945 | if ( lgdItem )
|
---|
| 946 | legend->insert( this, lgdItem );
|
---|
| 947 | }
|
---|
| 948 |
|
---|
| 949 | QwtLegendItem *l = qobject_cast<QwtLegendItem *>( lgdItem );
|
---|
| 950 | if ( l )
|
---|
| 951 | {
|
---|
| 952 | QSize sz = d_data->symbol->boundingSize();
|
---|
| 953 | sz += QSize( 2, 2 ); // margin
|
---|
| 954 |
|
---|
| 955 | if ( d_data->legendAttributes & QwtPlotCurve::LegendShowLine )
|
---|
| 956 | {
|
---|
| 957 | // Avoid, that the line is completely covered by the symbol
|
---|
| 958 |
|
---|
| 959 | int w = qCeil( 1.5 * sz.width() );
|
---|
| 960 | if ( w % 2 )
|
---|
| 961 | w++;
|
---|
| 962 |
|
---|
| 963 | sz.setWidth( qMax( 8, w ) );
|
---|
| 964 | }
|
---|
| 965 |
|
---|
| 966 | l->setIdentifierSize( sz );
|
---|
| 967 | }
|
---|
| 968 | }
|
---|
| 969 |
|
---|
| 970 | QwtPlotItem::updateLegend( legend );
|
---|
| 971 | }
|
---|
| 972 |
|
---|
| 973 | /*!
|
---|
| 974 | \brief Draw the identifier representing the curve on the legend
|
---|
| 975 |
|
---|
| 976 | \param painter Painter
|
---|
| 977 | \param rect Bounding rectangle for the identifier
|
---|
| 978 |
|
---|
| 979 | \sa setLegendAttribute(), QwtPlotItem::Legend
|
---|
| 980 | */
|
---|
| 981 | void QwtPlotCurve::drawLegendIdentifier(
|
---|
| 982 | QPainter *painter, const QRectF &rect ) const
|
---|
| 983 | {
|
---|
| 984 | if ( rect.isEmpty() )
|
---|
| 985 | return;
|
---|
| 986 |
|
---|
| 987 | const int dim = qMin( rect.width(), rect.height() );
|
---|
| 988 |
|
---|
| 989 | QSize size( dim, dim );
|
---|
| 990 |
|
---|
| 991 | QRectF r( 0, 0, size.width(), size.height() );
|
---|
| 992 | r.moveCenter( rect.center() );
|
---|
| 993 |
|
---|
| 994 | if ( d_data->legendAttributes == 0 )
|
---|
| 995 | {
|
---|
| 996 | QBrush brush = d_data->brush;
|
---|
| 997 | if ( brush.style() == Qt::NoBrush )
|
---|
| 998 | {
|
---|
| 999 | if ( style() != QwtPlotCurve::NoCurve )
|
---|
| 1000 | brush = QBrush( pen().color() );
|
---|
| 1001 | else if ( d_data->symbol &&
|
---|
| 1002 | ( d_data->symbol->style() != QwtSymbol::NoSymbol ) )
|
---|
| 1003 | {
|
---|
| 1004 | brush = QBrush( d_data->symbol->pen().color() );
|
---|
| 1005 | }
|
---|
| 1006 | }
|
---|
| 1007 | if ( brush.style() != Qt::NoBrush )
|
---|
| 1008 | painter->fillRect( r, brush );
|
---|
| 1009 | }
|
---|
| 1010 | if ( d_data->legendAttributes & QwtPlotCurve::LegendShowBrush )
|
---|
| 1011 | {
|
---|
| 1012 | if ( d_data->brush.style() != Qt::NoBrush )
|
---|
| 1013 | painter->fillRect( r, d_data->brush );
|
---|
| 1014 | }
|
---|
| 1015 | if ( d_data->legendAttributes & QwtPlotCurve::LegendShowLine )
|
---|
| 1016 | {
|
---|
| 1017 | if ( pen() != Qt::NoPen )
|
---|
| 1018 | {
|
---|
| 1019 | painter->setPen( pen() );
|
---|
| 1020 | QwtPainter::drawLine( painter, rect.left(), rect.center().y(),
|
---|
| 1021 | rect.right() - 1.0, rect.center().y() );
|
---|
| 1022 | }
|
---|
| 1023 | }
|
---|
| 1024 | if ( d_data->legendAttributes & QwtPlotCurve::LegendShowSymbol )
|
---|
| 1025 | {
|
---|
| 1026 | if ( d_data->symbol &&
|
---|
| 1027 | ( d_data->symbol->style() != QwtSymbol::NoSymbol ) )
|
---|
| 1028 | {
|
---|
| 1029 | QSize symbolSize = d_data->symbol->boundingSize();
|
---|
| 1030 | symbolSize -= QSize( 2, 2 );
|
---|
| 1031 |
|
---|
| 1032 | // scale the symbol size down if it doesn't fit into rect.
|
---|
| 1033 |
|
---|
| 1034 | double xRatio = 1.0;
|
---|
| 1035 | if ( rect.width() < symbolSize.width() )
|
---|
| 1036 | xRatio = rect.width() / symbolSize.width();
|
---|
| 1037 | double yRatio = 1.0;
|
---|
| 1038 | if ( rect.height() < symbolSize.height() )
|
---|
| 1039 | yRatio = rect.height() / symbolSize.height();
|
---|
| 1040 |
|
---|
| 1041 | const double ratio = qMin( xRatio, yRatio );
|
---|
| 1042 |
|
---|
| 1043 | painter->save();
|
---|
| 1044 | painter->scale( ratio, ratio );
|
---|
| 1045 |
|
---|
| 1046 | d_data->symbol->drawSymbol( painter, rect.center() / ratio );
|
---|
| 1047 |
|
---|
| 1048 | painter->restore();
|
---|
| 1049 | }
|
---|
| 1050 | }
|
---|
| 1051 | }
|
---|
| 1052 |
|
---|
| 1053 | /*!
|
---|
| 1054 | Initialize data with an array of points (explicitly shared).
|
---|
| 1055 |
|
---|
| 1056 | \param samples Vector of points
|
---|
| 1057 | */
|
---|
| 1058 | void QwtPlotCurve::setSamples( const QVector<QPointF> &samples )
|
---|
| 1059 | {
|
---|
| 1060 | delete d_series;
|
---|
| 1061 | d_series = new QwtPointSeriesData( samples );
|
---|
| 1062 | itemChanged();
|
---|
| 1063 | }
|
---|
| 1064 |
|
---|
| 1065 | #ifndef QWT_NO_COMPAT
|
---|
| 1066 |
|
---|
| 1067 | /*!
|
---|
| 1068 | \brief Initialize the data by pointing to memory blocks which
|
---|
| 1069 | are not managed by QwtPlotCurve.
|
---|
| 1070 |
|
---|
| 1071 | setRawSamples is provided for efficiency.
|
---|
| 1072 | It is important to keep the pointers
|
---|
| 1073 | during the lifetime of the underlying QwtCPointerData class.
|
---|
| 1074 |
|
---|
| 1075 | \param xData pointer to x data
|
---|
| 1076 | \param yData pointer to y data
|
---|
| 1077 | \param size size of x and y
|
---|
| 1078 |
|
---|
| 1079 | \sa QwtCPointerData
|
---|
| 1080 | */
|
---|
| 1081 | void QwtPlotCurve::setRawSamples(
|
---|
| 1082 | const double *xData, const double *yData, int size )
|
---|
| 1083 | {
|
---|
| 1084 | delete d_series;
|
---|
| 1085 | d_series = new QwtCPointerData( xData, yData, size );
|
---|
| 1086 | itemChanged();
|
---|
| 1087 | }
|
---|
| 1088 |
|
---|
| 1089 | /*!
|
---|
| 1090 | Set data by copying x- and y-values from specified memory blocks.
|
---|
| 1091 | Contrary to setRawSamples(), this function makes a 'deep copy' of
|
---|
| 1092 | the data.
|
---|
| 1093 |
|
---|
| 1094 | \param xData pointer to x values
|
---|
| 1095 | \param yData pointer to y values
|
---|
| 1096 | \param size size of xData and yData
|
---|
| 1097 |
|
---|
| 1098 | \sa QwtPointArrayData
|
---|
| 1099 | */
|
---|
| 1100 | void QwtPlotCurve::setSamples(
|
---|
| 1101 | const double *xData, const double *yData, int size )
|
---|
| 1102 | {
|
---|
| 1103 | delete d_series;
|
---|
| 1104 | d_series = new QwtPointArrayData( xData, yData, size );
|
---|
| 1105 | itemChanged();
|
---|
| 1106 | }
|
---|
| 1107 |
|
---|
| 1108 | /*!
|
---|
| 1109 | \brief Initialize data with x- and y-arrays (explicitly shared)
|
---|
| 1110 |
|
---|
| 1111 | \param xData x data
|
---|
| 1112 | \param yData y data
|
---|
| 1113 |
|
---|
| 1114 | \sa QwtPointArrayData
|
---|
| 1115 | */
|
---|
| 1116 | void QwtPlotCurve::setSamples( const QVector<double> &xData,
|
---|
| 1117 | const QVector<double> &yData )
|
---|
| 1118 | {
|
---|
| 1119 | delete d_series;
|
---|
| 1120 | d_series = new QwtPointArrayData( xData, yData );
|
---|
| 1121 | itemChanged();
|
---|
| 1122 | }
|
---|
| 1123 | #endif // !QWT_NO_COMPAT
|
---|
| 1124 |
|
---|