Shape2D.cpp 41.1 KB
Newer Older
1
2
3
// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
4
5
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
6
// SPDX - License - Identifier: GPL - 3.0 +
Roman Tolchenov's avatar
Roman Tolchenov committed
7
#include "MantidQtWidgets/InstrumentView/Shape2D.h"
8
#include "MantidQtWidgets/Common/TSVSerialiser.h"
9

LamarMoore's avatar
LamarMoore committed
10
#include <QMouseEvent>
11
12
13
14
15
#include <QPainter>
#include <QWheelEvent>

#include <QLine>
#include <QMap>
16
#include <QVector2D>
17
18
19

#include <algorithm>
#include <cmath>
20
#include <iostream>
LamarMoore's avatar
LamarMoore committed
21
#include <stdexcept>
22

23
24
25
26
27
28
29
30
31
namespace MantidQt {
namespace MantidWidgets {

// number of control points common for all shapes
const size_t Shape2D::NCommonCP = 4;
// size (== width/2 == height/2) of each control point
const double Shape2D::sizeCP = 3;

/**
LamarMoore's avatar
LamarMoore committed
32
33
34
 * Set default border color to red and fill color to default Qt color
 * (==QColor()).
 */
35
36
37
38
39
Shape2D::Shape2D()
    : m_color(Qt::red), m_fill_color(QColor()), m_scalable(true),
      m_editing(false), m_selected(false), m_visible(true) {}

/**
LamarMoore's avatar
LamarMoore committed
40
41
42
43
44
 * Calls virtual drawShape() method to draw the actial shape.
 * Draws bounding rect and control points if the shape is selected.
 *
 * @param painter :: QPainter used for drawing.
 */
45
46
47
void Shape2D::draw(QPainter &painter) const {
  if (!m_visible)
    return;
48
  painter.setPen(QPen(m_color, 0));
49
50
  this->drawShape(painter);
  if (m_editing || m_selected) {
51
    painter.setPen(QPen(QColor(255, 255, 255, 100), 0));
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
    painter.drawRect(m_boundingRect.toQRectF());
    size_t np = NCommonCP;
    double rsize = 2;
    int alpha = 100;
    if (m_editing) {
      // if editing show all CP, make them bigger and opaque
      np = getNControlPoints();
      rsize = sizeCP;
      alpha = 255;
    }
    for (size_t i = 0; i < np; ++i) {
      QPointF p = painter.transform().map(getControlPoint(i));
      QRectF r(p - QPointF(rsize, rsize), p + QPointF(rsize, rsize));
      painter.save();
      painter.resetTransform();
67
      painter.fillRect(r, QColor(255, 255, 255, alpha));
68
      r.adjust(-1, -1, 0, 0);
69
      painter.setPen(QPen(QColor(0, 0, 0, alpha), 0));
70
71
72
73
74
75
76
      painter.drawRect(r);
      painter.restore();
    }
  }
}

/**
LamarMoore's avatar
LamarMoore committed
77
78
 * Return total number of control points for this shape.
 */
79
80
81
82
83
size_t Shape2D::getNControlPoints() const {
  return NCommonCP + this->getShapeNControlPoints();
}

/**
LamarMoore's avatar
LamarMoore committed
84
85
86
87
 * Return coordinates of i-th control point.
 *
 * @param i :: Index of a control point. 0 <= i < getNControlPoints().
 */
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
QPointF Shape2D::getControlPoint(size_t i) const {
  if (i >= getNControlPoints()) {
    throw std::range_error("Control point index is out of range");
  }

  if (i < 4)
    return m_boundingRect.vertex(i);

  return getShapeControlPoint(i - NCommonCP);
}

void Shape2D::setControlPoint(size_t i, const QPointF &pos) {
  if (i >= getNControlPoints()) {
    throw std::range_error("Control point index is out of range");
  }

  if (i < 4) {
    m_boundingRect.setVertex(i, pos);
106

107
108
109
110
111
112
113
114
115
    refit();
  }
  // else ?
  else
    setShapeControlPoint(i - NCommonCP, pos);
  resetBoundingRect();
}

/**
LamarMoore's avatar
LamarMoore committed
116
117
118
119
 * Move the shape.
 *
 * @param dp :: The shift vector.
 */
120
121
122
123
124
125
void Shape2D::moveBy(const QPointF &dp) {
  m_boundingRect.translate(dp);
  refit();
}

/**
LamarMoore's avatar
LamarMoore committed
126
127
128
 * Adjust the bound of the bounding rect. Calls virtual method refit()
 * to resize the shape in order to fit into the new bounds.
 */
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
void Shape2D::adjustBoundingRect(double dx1, double dy1, double dx2,
                                 double dy2) {
  double dwidth = dx2 - dx1;
  if (dwidth <= -m_boundingRect.xSpan()) {
    double mu = m_boundingRect.xSpan() / fabs(dwidth);
    dx1 *= mu;
    dx2 *= mu;
  }
  double dheight = dy2 - dy1;
  if (dheight <= -m_boundingRect.ySpan()) {
    double mu = m_boundingRect.ySpan() / fabs(dheight);
    dy1 *= mu;
    dy2 *= mu;
  }
  m_boundingRect.adjust(QPointF(dx1, dy1), QPointF(dx2, dy2));
  refit();
}

/**
LamarMoore's avatar
LamarMoore committed
148
149
150
 * Assign new bounding rect. Calls virtual method refit()
 * to resize the shape in order to fit into the new bounds.
 */
151
152
153
154
155
156
void Shape2D::setBoundingRect(const RectF &rect) {
  m_boundingRect = rect;
  refit();
}

/**
LamarMoore's avatar
LamarMoore committed
157
158
159
160
 * Check if the shape masks a point.
 *
 * @param p :: Point to check.
 */
161
162
163
164
bool Shape2D::isMasked(const QPointF &p) const {
  return m_fill_color != QColor() && contains(p);
}

165
166
167
168
/** Load shape 2D state from a Mantid project file
 * @param lines :: lines from the project file to load state from
 * @return a new shape2D with old state applied
 */
169
Shape2D *Shape2D::loadFromProject(const std::string &lines) {
170
  API::TSVSerialiser tsv(lines);
Samuel Jackson's avatar
Samuel Jackson committed
171

172
173
  if (!tsv.selectLine("Type"))
    return nullptr;
Samuel Jackson's avatar
Samuel Jackson committed
174

175
176
  std::string type;
  tsv >> type;
Samuel Jackson's avatar
Samuel Jackson committed
177

178
179
180
  Shape2D *shape = loadShape2DFromType(type, lines);
  if (!shape)
    return nullptr;
Samuel Jackson's avatar
Samuel Jackson committed
181

182
183
184
  if (tsv.selectLine("Properties")) {
    bool scalable, editing, selected, visible;
    tsv >> scalable >> editing >> selected >> visible;
Samuel Jackson's avatar
Samuel Jackson committed
185

186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
    shape->setScalable(scalable);
    shape->edit(editing);
    shape->setSelected(selected);
    shape->setVisible(visible);
  }

  if (tsv.selectLine("Color")) {
    QColor color;
    tsv >> color;
    shape->setColor(color);
  }

  if (tsv.selectLine("FillColor")) {
    QColor color;
    tsv >> color;
    shape->setFillColor(color);
Samuel Jackson's avatar
Samuel Jackson committed
202
  }
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227

  return shape;
}

/**
 * Instantiate different types of Shape2D from a string
 *
 * @param type :: a string representing the type e.g. ellipse
 * @param lines :: Mantid project lines to parse state from
 * @return a new instance of a Shape2D
 */
Shape2D *Shape2D::loadShape2DFromType(const std::string &type,
                                      const std::string &lines) {
  Shape2D *shape = nullptr;

  if (type == "ellipse") {
    shape = Shape2DEllipse::loadFromProject(lines);
  } else if (type == "rectangle") {
    shape = Shape2DRectangle::loadFromProject(lines);
  } else if (type == "ring") {
    shape = Shape2DRing::loadFromProject(lines);
  } else if (type == "free") {
    shape = Shape2DFree::loadFromProject(lines);
  }

Samuel Jackson's avatar
Samuel Jackson committed
228
229
230
  return shape;
}

231
232
233
/** Save the state of the shape 2D to a Mantid project file
 * @return a string representing the state of the shape 2D
 */
234
std::string Shape2D::saveToProject() const {
235
  API::TSVSerialiser tsv;
236
  bool props[]{m_scalable, m_editing, m_selected, m_visible};
Samuel Jackson's avatar
Samuel Jackson committed
237
238

  tsv.writeLine("Properties");
239
  for (auto prop : props) {
Samuel Jackson's avatar
Samuel Jackson committed
240
241
242
243
    tsv << prop;
  }

  auto color = getColor();
244
  tsv.writeLine("Color") << color;
Samuel Jackson's avatar
Samuel Jackson committed
245
246

  auto fillColor = getFillColor();
247
  tsv.writeLine("FillColor") << fillColor;
Samuel Jackson's avatar
Samuel Jackson committed
248
249
250
251

  return tsv.outputLines();
}

252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
// --- Shape2DEllipse --- //

Shape2DEllipse::Shape2DEllipse(const QPointF &center, double radius1,
                               double radius2)
    : Shape2D() {
  if (radius2 == 0) {
    radius2 = radius1;
  }
  QPointF dr(radius1, radius2);
  m_boundingRect = RectF(center - dr, center + dr);
}

void Shape2DEllipse::drawShape(QPainter &painter) const {
  QRectF drawRect = m_boundingRect.toQRectF();
  painter.drawEllipse(drawRect);
  if (m_fill_color != QColor()) {
    QPainterPath path;
    path.addEllipse(drawRect);
    painter.fillPath(path, m_fill_color);
  }
}

void Shape2DEllipse::addToPath(QPainterPath &path) const {
  path.addEllipse(m_boundingRect.toQRectF());
}

bool Shape2DEllipse::selectAt(const QPointF &p) const {
  if (m_fill_color != QColor()) { // filled ellipse
    return contains(p);
  }

  double a = m_boundingRect.xSpan() / 2;
  if (a == 0.0)
    a = 1.0;
  double b = m_boundingRect.ySpan() / 2;
  if (b == 0.0)
    b = 1.0;
  double xx = m_boundingRect.x0() + a - double(p.x());
  double yy = m_boundingRect.y0() + b - double(p.y());

  double f = fabs(xx * xx / (a * a) + yy * yy / (b * b) - 1);

  return f < 0.1;
}

bool Shape2DEllipse::contains(const QPointF &p) const {
  if (m_boundingRect.isEmpty())
    return false;
  QPointF pp = m_boundingRect.center() - p;
  double a = m_boundingRect.xSpan() / 2;
  if (a == 0.0)
    a = 1.0;
  double b = m_boundingRect.ySpan() / 2;
  if (b == 0.0)
    b = 1.0;
  double xx = pp.x();
  double yy = pp.y();

  double f = xx * xx / (a * a) + yy * yy / (b * b);

  return f <= 1.0;
}

QStringList Shape2DEllipse::getDoubleNames() const {
  QStringList res;
  res << "radius1"
      << "radius2";
  return res;
}

double Shape2DEllipse::getDouble(const QString &prop) const {
  if (prop == "radius1") {
    return m_boundingRect.width() / 2;
  } else if (prop == "radius2") {
    return m_boundingRect.height() / 2;
  }
  return 0.0;
}

void Shape2DEllipse::setDouble(const QString &prop, double value) {
  if (prop == "radius1") {
    if (value <= 0.0)
      value = 1.0;
    double d = value - m_boundingRect.width() / 2;
    adjustBoundingRect(-d, 0, d, 0);
  } else if (prop == "radius2") {
    if (value <= 0.0)
      value = 1.0;
    double d = value - m_boundingRect.height() / 2;
    adjustBoundingRect(0, -d, 0, d);
  }
}

QPointF Shape2DEllipse::getPoint(const QString &prop) const {
  if (prop == "center" || prop == "centre") {
    return m_boundingRect.center();
  }
  return QPointF();
}

void Shape2DEllipse::setPoint(const QString &prop, const QPointF &value) {
  if (prop == "center" || prop == "centre") {
    m_boundingRect.moveCenter(value);
  }
}

358
359
360
361
/** Load shape 2D state from a Mantid project file
 * @param lines :: lines from the project file to load state from
 * @return a new shape2D in the shape of a ellipse
 */
362
Shape2D *Shape2DEllipse::loadFromProject(const std::string &lines) {
363
  API::TSVSerialiser tsv(lines);
Samuel Jackson's avatar
Samuel Jackson committed
364
365
366
367
368
369
  tsv.selectLine("Parameters");
  double radius1, radius2, x, y;
  tsv >> radius1 >> radius2 >> x >> y;
  return new Shape2DEllipse(QPointF(x, y), radius1, radius2);
}

370
371
372
/** Save the state of the shape 2D ellipe to a Mantid project file
 * @return a string representing the state of the shape 2D
 */
373
std::string Shape2DEllipse::saveToProject() const {
374
  API::TSVSerialiser tsv;
Samuel Jackson's avatar
Samuel Jackson committed
375
376
377
378
379
380
381
382
383
  double radius1 = getDouble("radius1");
  double radius2 = getDouble("radius2");
  auto centre = getPoint("centre");

  tsv.writeLine("Type") << "ellipse";
  tsv.writeLine("Parameters") << radius1 << radius2 << centre.x(), centre.y();
  tsv.writeRaw(Shape2D::saveToProject());
  return tsv.outputLines();
}
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
// --- Shape2DRectangle --- //

Shape2DRectangle::Shape2DRectangle() { m_boundingRect = RectF(); }

Shape2DRectangle::Shape2DRectangle(const QPointF &p0, const QPointF &p1) {
  m_boundingRect = RectF(p0, p1);
}

Shape2DRectangle::Shape2DRectangle(const QPointF &p0, const QSizeF &size) {
  m_boundingRect = RectF(p0, size);
}

bool Shape2DRectangle::selectAt(const QPointF &p) const {
  if (m_fill_color != QColor()) { // filled rectangle
    return contains(p);
  }

  RectF outer(m_boundingRect);
  outer.adjust(QPointF(-2, -2), QPointF(2, 2));
  RectF inner(m_boundingRect);
  inner.adjust(QPointF(2, 2), QPointF(-2, -2));
  return outer.contains(p) && !inner.contains(p);
}

void Shape2DRectangle::drawShape(QPainter &painter) const {
  QRectF drawRect = m_boundingRect.toQRectF();
  painter.drawRect(drawRect);
  if (m_fill_color != QColor()) {
    QPainterPath path;
    path.addRect(drawRect);
    painter.fillPath(path, m_fill_color);
  }
}

void Shape2DRectangle::addToPath(QPainterPath &path) const {
  path.addRect(m_boundingRect.toQRectF());
}

422
423
424
425
/** Load shape 2D state from a Mantid project file
 * @param lines :: lines from the project file to load state from
 * @return a new shape2D in the shape of a rectangle
 */
426
Shape2D *Shape2DRectangle::loadFromProject(const std::string &lines) {
427
  API::TSVSerialiser tsv(lines);
Samuel Jackson's avatar
Samuel Jackson committed
428
429
430
431
432
433
434
435
  tsv.selectLine("Parameters");
  double x0, y0, x1, y1;
  tsv >> x0 >> y0 >> x1 >> y1;
  QPointF point1(x0, y0);
  QPointF point2(x1, y1);
  return new Shape2DRectangle(point1, point2);
}

436
437
438
/** Save the state of the shape 2D rectangle to a Mantid project file
 * @return a string representing the state of the shape 2D
 */
439
std::string Shape2DRectangle::saveToProject() const {
440
  API::TSVSerialiser tsv;
Samuel Jackson's avatar
Samuel Jackson committed
441
442
443
444
445
446
447
448
449
450
451
  auto x0 = m_boundingRect.x0();
  auto x1 = m_boundingRect.x1();
  auto y0 = m_boundingRect.y0();
  auto y1 = m_boundingRect.y1();

  tsv.writeLine("Type") << "rectangle";
  tsv.writeLine("Parameters") << x0 << y0 << x1 << y1;
  tsv.writeRaw(Shape2D::saveToProject());
  return tsv.outputLines();
}

452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
// --- Shape2DRing --- //

Shape2DRing::Shape2DRing(Shape2D *shape, double xWidth, double yWidth)
    : m_outer_shape(shape), m_xWidth(xWidth), m_yWidth(yWidth) {
  m_inner_shape = m_outer_shape->clone();
  m_inner_shape->getBoundingRect();
  m_inner_shape->adjustBoundingRect(m_xWidth, m_yWidth, -m_xWidth, -m_yWidth);
  resetBoundingRect();
  m_outer_shape->setFillColor(QColor());
  m_inner_shape->setFillColor(QColor());
}

Shape2DRing::Shape2DRing(const Shape2DRing &ring)
    : Shape2D(), m_outer_shape(ring.m_outer_shape->clone()),
      m_inner_shape(ring.m_inner_shape->clone()), m_xWidth(ring.m_xWidth),
      m_yWidth(ring.m_yWidth) {
  resetBoundingRect();
}

bool Shape2DRing::selectAt(const QPointF &p) const { return contains(p); }

bool Shape2DRing::contains(const QPointF &p) const {
  return m_outer_shape->contains(p) && !m_inner_shape->contains(p);
}

void Shape2DRing::drawShape(QPainter &painter) const {
  m_outer_shape->draw(painter);
  m_inner_shape->draw(painter);
  if (m_fill_color != QColor()) {
    QPainterPath path;
    m_outer_shape->addToPath(path);
    m_inner_shape->addToPath(path);
    painter.fillPath(path, m_fill_color);
  }
}

void Shape2DRing::refit() {
  if (m_xWidth <= 0)
    m_xWidth = 0.000001;
  if (m_yWidth <= 0)
    m_yWidth = 0.000001;
  double xWidth = m_xWidth;
  double yWidth = m_yWidth;
  double max_width = m_boundingRect.width() / 2;
  if (xWidth > max_width)
    xWidth = max_width;
  double max_height = m_boundingRect.height() / 2;
  if (yWidth > max_height)
    yWidth = max_height;
  m_outer_shape->setBoundingRect(m_boundingRect);
  m_inner_shape->setBoundingRect(m_boundingRect);
  m_inner_shape->adjustBoundingRect(xWidth, yWidth, -xWidth, -yWidth);
}

void Shape2DRing::resetBoundingRect() {
  m_boundingRect = m_outer_shape->getBoundingRect();
}

QPointF Shape2DRing::getShapeControlPoint(size_t i) const {
  RectF rect = m_inner_shape->getBoundingRect();
  switch (i) {
  case 0:
    return QPointF(rect.center().x(), rect.y1());
  case 1:
    return QPointF(rect.center().x(), rect.y0());
  case 2:
    return QPointF(rect.x0(), rect.center().y());
  case 3:
    return QPointF(rect.x1(), rect.center().y());
  }
  return QPointF();
}

void Shape2DRing::setShapeControlPoint(size_t i, const QPointF &pos) {
  QPointF dp = pos - getShapeControlPoint(i);

  switch (i) {
  case 0:
    m_yWidth -= dp.y();
    break;
  case 1:
    m_yWidth += dp.y();
    break;
  case 2:
    m_xWidth += dp.x();
    break;
  case 3:
    m_xWidth -= dp.x();
    break;
  }
  refit();
}

QStringList Shape2DRing::getDoubleNames() const {
  QStringList res;
  res << "xwidth"
      << "ywidth";
  return res;
}

double Shape2DRing::getDouble(const QString &prop) const {
  if (prop == "xwidth") {
    return m_xWidth;
  }
  if (prop == "ywidth") {
    return m_yWidth;
  }
  return 0.0;
}

void Shape2DRing::setDouble(const QString &prop, double value) {
  if (prop == "xwidth") {
    m_xWidth = value;
    refit();
  }
  if (prop == "ywidth") {
    m_yWidth = value;
    refit();
  }
}

QPointF Shape2DRing::getPoint(const QString &prop) const {
  if (prop == "center") {
    return m_boundingRect.center();
  }
  return QPointF();
}

void Shape2DRing::setPoint(const QString &prop, const QPointF &value) {
  if (prop == "center") {
    m_boundingRect.moveCenter(value);
  }
}

void Shape2DRing::setColor(const QColor &color) {
  m_inner_shape->setColor(color);
  m_outer_shape->setColor(color);
}

591
592
593
594
/** Load shape 2D state from a Mantid project file
 * @param lines :: lines from the project file to load state from
 * @return a new shape2D in the shape of a ring
 */
595
Shape2D *Shape2DRing::loadFromProject(const std::string &lines) {
596
  API::TSVSerialiser tsv(lines);
Samuel Jackson's avatar
Samuel Jackson committed
597
598
599
600
601
602
603
604
605
606
607
608
  tsv.selectLine("Parameters");
  double xWidth, yWidth;
  tsv >> xWidth >> yWidth;

  tsv.selectSection("shape");
  std::string baseShapeLines;
  tsv >> baseShapeLines;

  auto baseShape = Shape2D::loadFromProject(baseShapeLines);
  return new Shape2DRing(baseShape, xWidth, yWidth);
}

609
610
611
/** Save the state of the shape 2D ring to a Mantid project file
 * @return a string representing the state of the shape 2D
 */
612
std::string Shape2DRing::saveToProject() const {
613
  API::TSVSerialiser tsv;
Samuel Jackson's avatar
Samuel Jackson committed
614
615
616
617
618
619
620
621
622
623
624
  auto xWidth = getDouble("xwidth");
  auto yWidth = getDouble("ywidth");
  auto baseShape = getOuterShape();

  tsv.writeLine("Type") << "ring";
  tsv.writeLine("Parameters") << xWidth << yWidth;
  tsv.writeSection("shape", baseShape->saveToProject());
  tsv.writeRaw(Shape2D::saveToProject());
  return tsv.outputLines();
}

625
626
// --- Shape2DSector --- //

627
628
Shape2DSector::Shape2DSector(double innerRadius, double outerRadius,
                             double startAngle, double endAngle,
629
                             const QPointF &center) {
630
631
  m_innerRadius = std::min(innerRadius, outerRadius);
  m_outerRadius = std::max(innerRadius, outerRadius);
632

633
634
  m_startAngle = std::fmod(startAngle, 2 * M_PI);
  m_endAngle = std::fmod(endAngle, 2 * M_PI);
635
636
637
638
  m_center = center;
  resetBoundingRect();
}

Mathieu Tillet's avatar
Mathieu Tillet committed
639
640
641
642
643
Shape2DSector::Shape2DSector(const Shape2DSector &sector)
    : Shape2D(), m_innerRadius(sector.m_innerRadius),
      m_outerRadius(sector.m_outerRadius), m_startAngle(sector.m_startAngle),
      m_endAngle(sector.m_endAngle), m_center(sector.m_center) {
  resetBoundingRect();
644
}
Mathieu Tillet's avatar
Mathieu Tillet committed
645

646
647
648
649
650
651
/**
 * @brief Shape2DSector::selectAt
 * Checks if the sector can be selected at a given point
 * @param p :: the position to check
 * @return
 */
652
653
bool Shape2DSector::selectAt(const QPointF &p) const { return contains(p); }

654
655
656
657
658
659
/**
 * @brief Shape2DSector::contains
 * Checks if a given point is inside the sector
 * @param p :: the position to check
 * @return
 */
660
661
662
bool Shape2DSector::contains(const QPointF &p) const {
  QPointF relPos = p - m_center;

663
  double distance = distanceBetween(relPos, QPointF(0, 0));
664
665
666
667
  if (distance < m_innerRadius || distance > m_outerRadius) {
    return false;
  }

668
  double angle = std::atan2(relPos.y(), relPos.x());
669
670
671
  if (angle < 0) {
    angle += 2 * M_PI;
  }
672

673
674
675
676
677
  return ((m_startAngle <= angle && angle <= m_endAngle) ||
          (m_startAngle > m_endAngle &&
           (angle <= m_endAngle || angle >= m_startAngle)));
}

678
679
680
681
682
/**
 * @brief Shape2DSector::drawShape
 * Uses Qt to actually draw the sector shape.
 * @param painter :: QPainter used for drawing.
 */
683
684
685
void Shape2DSector::drawShape(QPainter &painter) const {
  QPainterPath path;
  double to_degrees = 180 / M_PI;
686
687
  double x_origin = m_center.x() + std::cos(m_startAngle) * m_innerRadius;
  double y_origin = m_center.y() + std::sin(m_startAngle) * m_innerRadius;
688

689
690
  double x_arcEnd = m_center.x() + std::cos(m_endAngle) * m_outerRadius;
  double y_arcEnd = m_center.y() + std::sin(m_endAngle) * m_outerRadius;
691
692

  double sweepLength = (m_endAngle - m_startAngle) * to_degrees;
693
694
695
  if (sweepLength < 0) {
    sweepLength += 360;
  }
696
697

  path.moveTo(x_origin, y_origin);
698
699
  QRectF absoluteBBox(QPointF(-1, 1), QPointF(1, -1));

700
701
702
703
704
705
706
707
708
709
  path.arcTo(QRectF(absoluteBBox.topLeft() * m_innerRadius + m_center,
                    absoluteBBox.bottomRight() * m_innerRadius + m_center),
             m_startAngle * to_degrees, sweepLength);
  path.lineTo(x_arcEnd, y_arcEnd);
  path.arcTo(QRectF(absoluteBBox.topLeft() * m_outerRadius + m_center,
                    absoluteBBox.bottomRight() * m_outerRadius + m_center),
             m_endAngle * to_degrees, -sweepLength);
  path.closeSubpath();

  painter.drawPath(path);
710
711
712
  if (m_fill_color != QColor()) {
    painter.fillPath(path, m_fill_color);
  }
713
714
}

715
716
717
718
719
720
721
722
723
/**
 * Compute the bounding box of the sector defined by the attributes m_center,
 * m_startAngle, m_endAngle, m_innerRadius, m_outerRadius (and NOT using
 * m_boundingBox)
 **/
QRectF Shape2DSector::findSectorBoundingBox() {
  double xMin, xMax, yMin, yMax;

  // checking in turns the limits of the bounding box
724

725
726
727
728
729
730
  // the yMax value is the outerRaius if the sector reaches pi/2
  if ((m_startAngle <= M_PI / 2 && m_endAngle >= M_PI / 2) ||
      (m_startAngle > m_endAngle &&
       !(m_startAngle >= M_PI / 2 && m_endAngle <= M_PI / 2))) {
    yMax = m_outerRadius;
    // else it has to be computed
731
  } else {
732
733
    yMax = std::max(std::sin(m_startAngle), std::sin(m_endAngle));
    yMax = std::max(yMax * m_innerRadius, yMax * m_outerRadius);
734
735
  }

736
737
738
739
740
  // xMin is -outerRadius if the sector reaches pi
  if ((m_startAngle <= M_PI && m_endAngle >= M_PI) ||
      (m_startAngle > m_endAngle &&
       !(m_startAngle >= M_PI && m_endAngle <= M_PI))) {
    xMin = -m_outerRadius;
741
  } else {
742
743
    xMin = std::min(std::cos(m_startAngle), std::cos(m_endAngle));
    xMin = std::min(xMin * m_innerRadius, xMin * m_outerRadius);
744
745
  }

746
747
748
749
750
  // yMin is -outerRadius if the sector reaches 3pi/2
  if ((m_startAngle <= 3 * M_PI / 2 && m_endAngle >= 3 * M_PI / 2) ||
      (m_startAngle > m_endAngle &&
       !(m_startAngle >= 3 * M_PI / 2 && m_endAngle <= 3 * M_PI / 2))) {
    yMin = -m_outerRadius;
751
  } else {
752
753
    yMin = std::min(std::sin(m_startAngle), std::sin(m_endAngle));
    yMin = std::min(yMin * m_innerRadius, yMin * m_outerRadius);
754
755
  }

756
757
758
759
  // and xMax is outerRadius if the sector reaches 0 (which is equivalent to
  // this condition, given the constraints on the angles)
  if (m_startAngle > m_endAngle) {
    xMax = m_outerRadius;
760
  } else {
761
762
    xMax = std::max(std::cos(m_startAngle), std::cos(m_endAngle));
    xMax = std::max(xMax * m_innerRadius, xMax * m_outerRadius);
763
764
  }

765
766
767
  QPointF topLeft(xMin, yMax);
  QPointF bottomRight(xMax, yMin);
  return QRectF(topLeft + m_center, bottomRight + m_center);
768
769
}

770
771
772
773
774
/**
 * @brief Shape2DSector::refit
 * Enforce coherence between all the parameters defining the sector. Used when
 * it is updated, mostly when moved or scaled.
 */
775
void Shape2DSector::refit() {
776
777
778
779
780
  constexpr double epsilon = 1e-6;

  // current real bounding box of the sector, based on the attributes, before
  // the user's modifications take place
  QRectF BBox = findSectorBoundingBox();
781

782
  // corners of the user-modified bounding box
783
784
785
786
787
788
789
  QPointF bRectTopLeft(
      std::min(m_boundingRect.p0().x(), m_boundingRect.p1().x()),
      std::max(m_boundingRect.p0().y(), m_boundingRect.p1().y()));
  QPointF bRectBottomRight(
      std::max(m_boundingRect.p0().x(), m_boundingRect.p1().x()),
      std::min(m_boundingRect.p0().y(), m_boundingRect.p1().y()));

790
  // check if the bounding box has been modified
791
792
793
794

  // since the calculus are made on relatively small numbers, some errors can
  // progressively appear and stack, so we have to take a range rather than a
  // strict equality
795
  if (BBox.topLeft().x() != bRectTopLeft.x() &&
796
      BBox.topLeft().y() != bRectTopLeft.y() &&
797
798
      std::abs(BBox.bottomRight().x() - bRectBottomRight.x()) < epsilon &&
      std::abs(BBox.bottomRight().y() - bRectBottomRight.y()) < epsilon) {
799

800
    // top left corner is moving
Mathieu Tillet's avatar
Mathieu Tillet committed
801
    computeScaling(BBox.topLeft(), BBox.bottomRight(), bRectTopLeft, 0);
802

803
804
  } else if (BBox.topLeft().x() != bRectTopLeft.x() &&
             BBox.bottomRight().y() != bRectBottomRight.y() &&
805
806
807
             std::abs(BBox.bottomRight().x() - bRectBottomRight.x()) <
                 epsilon &&
             std::abs(BBox.topLeft().y() - bRectTopLeft.y()) < epsilon) {
808

809
810
811
    // bottom left corner is moving
    computeScaling(BBox.bottomLeft(), BBox.topRight(),
                   QPointF(bRectTopLeft.x(), bRectBottomRight.y()), 1);
812
813
814

  } else if (BBox.bottomRight().x() != bRectBottomRight.x() &&
             BBox.bottomRight().y() != bRectBottomRight.y() &&
815
816
             std::abs(BBox.topLeft().x() - bRectTopLeft.x()) < epsilon &&
             std::abs(BBox.topLeft().y() - bRectTopLeft.y()) < epsilon) {
817

818
819
    // bottom right corner is moving
    computeScaling(BBox.bottomRight(), BBox.topLeft(), bRectBottomRight, 2);
820
821
822

  } else if (BBox.bottomRight().x() != bRectBottomRight.x() &&
             BBox.topLeft().y() != bRectTopLeft.y() &&
823
824
825
             std::abs(BBox.topLeft().x() - bRectTopLeft.x()) < epsilon &&
             std::abs(BBox.bottomRight().y() - bRectBottomRight.y()) <
                 epsilon) {
826

827
828
829
    // top right corner is moving
    computeScaling(BBox.topRight(), BBox.bottomLeft(),
                   QPointF(bRectBottomRight.x(), bRectTopLeft.y()), 3);
830
831
  }

832
  // check if the shape has moved
833
834
  if ((BBox.bottomRight().x() != bRectBottomRight.x() &&
       BBox.topLeft().x() != bRectTopLeft.x() &&
835
836
       std::abs((BBox.bottomRight().x() - bRectBottomRight.x()) -
                (BBox.topLeft().x() - bRectTopLeft.x())) < epsilon) ||
837
838
      (BBox.bottomRight().y() != bRectBottomRight.y() &&
       BBox.topLeft().y() != bRectTopLeft.y() &&
839
840
       std::abs((BBox.bottomRight().y() - bRectBottomRight.y()) -
                (BBox.topLeft().y() - bRectTopLeft.y())) < epsilon)) {
841
842
843
844
845
846
    // every corner has moved by the same distance -> the shape is being moved
    qreal xDiff = bRectBottomRight.x() - BBox.bottomRight().x();
    qreal yDiff = bRectBottomRight.y() - BBox.bottomRight().y();

    m_center.setX(m_center.x() + xDiff);
    m_center.setY(m_center.y() + yDiff);
Mathieu Tillet's avatar
Mathieu Tillet committed
847
    resetBoundingRect();
848
  }
849
850
}

851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
/**
 * @brief Shape2DSector::computeScaling
 * Used when updating the bounding box after the user dragged a corner. Given
 * the constraints of a circular sector, the new bounding box cannot be exactly
 * the one drawed by the mouse of the user, and thus a number of corrections are
 * needed.
 * This method thus corrects this new value and then modifies the difining
 * parameters of the sector accordingly.
 *
 * @param BBoxCorner :: the corner modified by the user, before it has been
 * changed.
 * @param BBoxOpposedCorner :: the corner diagonally opposed to the one the user
 * modified, which has not changed
 * @param bRectCorner :: the new position of the corner moved by the user,
 * before any correction applies
 * @param vertexIndex :: the index of the vertex corresponding to the one
 * modified by the user in m_boundingRect
 */
void Shape2DSector::computeScaling(const QPointF &BBoxCorner,
                                   const QPointF &BBoxOpposedCorner,
                                   const QPointF &bRectCorner,
                                   int vertexIndex) {
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892

  // first we need to find the best projection of the new corner on the
  // diagonal line of the rectangle, so its shape won't be modified, only
  // scaled.
  QPointF xProj, yProj, proj;
  qreal xPos, yPos;
  QVector2D slope;

  slope = QVector2D(BBoxCorner - BBoxOpposedCorner);
  xPos = (bRectCorner - BBoxCorner).x();
  yPos = slope.y() * xPos / slope.x(); // TODO : check if non zero
  xProj.setX(xPos);
  xProj.setY(yPos);

  yPos = (bRectCorner - BBoxCorner).y();
  xPos = slope.x() * yPos / slope.y();

  yProj.setX(xPos);
  yProj.setY(yPos);

893
894
895
896
897
898
899
900
  if (slope.x() != 0 && slope.y() != 0) {
    if (distanceBetween(xProj, QPointF(0, 0)) <
        distanceBetween(yProj, QPointF(0, 0))) {
      proj = xProj;
    } else {
      proj = yProj;
    }
  } else if (slope.x() != 0) {
901
    proj = xProj;
902
  } else if (slope.y() != 0) {
903
    proj = yProj;
904
905
906
907
  } else {
    // case that is not supposed to happen; it means the sector has been reduced
    // to a point, which is not possible
    return;
908
909
  }
  proj += BBoxCorner;
910

911
912
913
914
915
916
917
  // then we need to adapt the shape to the new size
  qreal ratio = distanceBetween(proj, BBoxOpposedCorner) /
                distanceBetween(slope.toPointF(), QPointF(0, 0));

  m_boundingRect.setVertex(vertexIndex, proj);

  m_innerRadius *= ratio;
918
  m_outerRadius = ratio != 0 ? m_outerRadius * ratio : 1e-4;
919
920
921
922
  m_center.setX((m_center.x() - BBoxOpposedCorner.x()) * ratio +
                BBoxOpposedCorner.x());
  m_center.setY((m_center.y() - BBoxOpposedCorner.y()) * ratio +
                BBoxOpposedCorner.y());
923
924
}

925
926
927
928
929
930
931
932
933
/**
 * @brief Shape2DSector::distanceBetween
 * Helper method to calculate the distance between 2 QPointF points.
 * @param p0 :: the first point
 * @param p1 :: the second point
 * @return  the distance
 */
double Shape2DSector::distanceBetween(const QPointF &p0,
                                      const QPointF &p1) const {
934
  return sqrt(pow(p0.x() - p1.x(), 2) + pow(p0.y() - p1.y(), 2));
935
936
}

937
938
939
940
941
/**
 * @brief Shape2DSector::resetBoundingRect
 * Compute m_boundingBox using the geometrical parameters of the sector (ie
 * center, angles and radii)
 **/
942
943
void Shape2DSector::resetBoundingRect() {

944
945
946
  QRectF BBox = findSectorBoundingBox();
  // because of how Mantid's rectangles are defined, it is necessary to pass the
  // arguments in this precise order in order to have a smooth scaling when
947
  // creating a shape from top left corner
948
  m_boundingRect = RectF(BBox.bottomLeft(), BBox.topRight());
949
950
}

951
952
953
954
955
956
/**
 * Return coordinates of i-th control point.
 * 0 controls the outer radius, 1 the inner, 2 the starting angle and 3 the
 * ending one.
 * @param i :: Index of a control point. 0 <= i < getNControlPoints().
 */
957
958
959
QPointF Shape2DSector::getShapeControlPoint(size_t i) const {
  double halfAngle =
      m_startAngle < m_endAngle
960
961
          ? std::fmod((m_startAngle + m_endAngle) / 2., 2 * M_PI)
          : std::fmod((m_startAngle + m_endAngle + 2 * M_PI) / 2, 2 * M_PI);
962
963
964
965
  double halfLength = (m_outerRadius + m_innerRadius) / 2;

  switch (i) {
  case 0:
966
967
    return QPointF(m_center.x() + std::cos(halfAngle) * m_outerRadius,
                   m_center.y() + std::sin(halfAngle) * m_outerRadius);
968
  case 1:
969
970
    return QPointF(m_center.x() + std::cos(halfAngle) * m_innerRadius,
                   m_center.y() + std::sin(halfAngle) * m_innerRadius);
971
  case 2:
972
973
    return QPointF(m_center.x() + std::cos(m_startAngle) * halfLength,
                   m_center.y() + std::sin(m_startAngle) * halfLength);
974
  case 3:
975
976
977
978
    return QPointF(m_center.x() + std::cos(m_endAngle) * halfLength,
                   m_center.y() + std::sin(m_endAngle) * halfLength);
  default:
    return QPointF();
979
980
981
  }
}

982
983
984
985
986
987
988
989
990
/**
 * @brief Shape2DSector::setShapeControlPoint
 * Modify the sector when the i-th control point is moved.
 * 0 is outer radius, 1 is inner, 2 is starting angle, 3 is ending.
 * @param i :: index of the control point changed
 * @param pos :: the new position of the control point (might not be where it is
 * palced at the end of the update though, since there are constraints to take
 * into account)
 */
991
992
void Shape2DSector::setShapeControlPoint(size_t i, const QPointF &pos) {
  QPointF to_center = pos - m_center;
993
  constexpr double epsilon = 1e-6;
Mathieu Tillet's avatar
Mathieu Tillet committed
994
  double newAngle;
995

996
997
  switch (i) {
  case 0:
998
    m_outerRadius = distanceBetween(to_center, QPointF(0, 0));
Mathieu Tillet's avatar
Mathieu Tillet committed
999
    if (m_outerRadius < m_innerRadius) {
1000
      m_outerRadius = m_innerRadius != 0 ? 1.01 * m_innerRadius : 1e-4;