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Reference Guide
TPolyLine.cxx
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1// @(#)root/graf:$Id$
2// Author: Rene Brun 12/12/94
3
4/*************************************************************************
5 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12#include <iostream>
13#include <vector>
14#include "TROOT.h"
15#include "TBuffer.h"
16#include "TMath.h"
17#include "TVirtualPad.h"
18#include "TVirtualX.h"
19#include "TPolyLine.h"
20
22
23/** \class TPolyLine
24\ingroup BasicGraphics
25
26Defined by an array on N points in a 2-D space.
27
28One can draw the contour of the polyline or/and its fill area.
29Example:
30Begin_Macro(source)
31{
32 Double_t x[5] = {.2,.7,.6,.25,.2};
33 Double_t y[5] = {.5,.1,.9,.7,.5};
34 TPolyLine *pline = new TPolyLine(5,x,y);
35 pline->SetFillColor(38);
36 pline->SetLineColor(2);
37 pline->SetLineWidth(4);
38 pline->Draw("f");
39 pline->Draw();
40}
41End_Macro
42*/
43
44////////////////////////////////////////////////////////////////////////////////
45/// PolyLine default constructor.
46
48{
49}
50
51////////////////////////////////////////////////////////////////////////////////
52/// PolyLine normal constructor without initialisation.
53/// Allocates n points.
54
57{
59 if (n <= 0)
60 return;
61
62 fN = n;
63 fX = new Double_t[fN];
64 fY = new Double_t[fN];
65}
66
67////////////////////////////////////////////////////////////////////////////////
68/// PolyLine normal constructor (single precision).
69/// Makes n points with (x, y) coordinates from x and y.
70
73{
75 if (n <= 0)
76 return;
77
78 fN = n;
79 fX = new Double_t[fN];
80 fY = new Double_t[fN];
81 if (!x || !y) return;
82 for (Int_t i = 0; i < fN; i++) {
83 fX[i] = x[i];
84 fY[i] = y[i];
85 }
86 fLastPoint = fN-1;
87}
88
89////////////////////////////////////////////////////////////////////////////////
90/// PolyLine normal constructor (double precision).
91/// Makes n points with (x, y) coordinates from x and y.
92
95{
97 if (n <= 0)
98 return;
99 fN = n;
100 fX = new Double_t[fN];
101 fY = new Double_t[fN];
102 if (!x || !y) return;
103 for (Int_t i=0; i<fN;i++) {
104 fX[i] = x[i];
105 fY[i] = y[i];
106 }
107 fLastPoint = fN-1;
108}
109
110////////////////////////////////////////////////////////////////////////////////
111///assignment operator
112
114{
115 if(this != &pl)
116 pl.TPolyLine::Copy(*this);
117 return *this;
118}
119
120////////////////////////////////////////////////////////////////////////////////
121/// PolyLine default destructor.
122
124{
125 if (fX) delete [] fX;
126 if (fY) delete [] fY;
127}
128
129////////////////////////////////////////////////////////////////////////////////
130/// PolyLine copy constructor.
131
132TPolyLine::TPolyLine(const TPolyLine &polyline) : TObject(polyline), TAttLine(polyline), TAttFill(polyline)
133{
134 polyline.TPolyLine::Copy(*this);
135}
136
137////////////////////////////////////////////////////////////////////////////////
138/// Copy this polyline to polyline.
139
140void TPolyLine::Copy(TObject &obj) const
141{
142 TObject::Copy(obj);
143 TAttLine::Copy(((TPolyLine&)obj));
144 TAttFill::Copy(((TPolyLine&)obj));
145 ((TPolyLine&)obj).fN = fN;
146 delete [] ((TPolyLine&)obj).fX;
147 delete [] ((TPolyLine&)obj).fY;
148 if (fN > 0) {
149 ((TPolyLine&)obj).fX = new Double_t[fN];
150 ((TPolyLine&)obj).fY = new Double_t[fN];
151 for (Int_t i = 0; i < fN; i++) {
152 ((TPolyLine &)obj).fX[i] = fX[i];
153 ((TPolyLine &)obj).fY[i] = fY[i];
154 }
155 } else {
156 ((TPolyLine&)obj).fX = nullptr;
157 ((TPolyLine&)obj).fY = nullptr;
158 }
159 ((TPolyLine&)obj).fOption = fOption;
160 ((TPolyLine&)obj).fLastPoint = fLastPoint;
161}
162
163////////////////////////////////////////////////////////////////////////////////
164/// Returns closest distance in pixels from point (px, py) to a polyline.
165///
166/// First looks for distances to the points of the polyline. Stops search
167/// and returns if a vertex of the polyline is found to be closer than 10
168/// pixels. Thus the return value may depend on the ordering of points
169/// in the polyline.
170///
171/// Then looks for distances to the lines of the polyline. There is no
172/// arbitrary cutoff; any distance may be found.
173///
174/// Finally checks whether (px, py) is inside a closed and filled polyline.
175/// (Must be EXACTLY closed. "Filled" means fill color and fill style are
176/// both non-zero.) If so, returns zero.
177///
178/// Returns 9999 if the polyline has no points.
179
181{
182 const Int_t big = 9999;
183 const Int_t kMaxDiff = 10;
184
185 // check if point is near one of the points
186 Int_t i, pxp, pyp, d;
187 Int_t distance = big;
188 if (Size() <= 0) return distance;
189
190 for (i=0;i<Size();i++) {
191 pxp = gPad->XtoAbsPixel(gPad->XtoPad(fX[i]));
192 pyp = gPad->YtoAbsPixel(gPad->YtoPad(fY[i]));
193 d = TMath::Abs(pxp-px) + TMath::Abs(pyp-py);
194 if (d < distance) distance = d;
195 }
196 if (distance < kMaxDiff) return distance;
197
198 // check if point is near one of the connecting lines
199 for (i=0;i<Size()-1;i++) {
200 d = DistancetoLine(px, py, gPad->XtoPad(fX[i]), gPad->YtoPad(fY[i]), gPad->XtoPad(fX[i+1]), gPad->YtoPad(fY[i+1]));
201 if (d < distance) distance = d;
202 }
203
204 // in case of a closed and filled polyline, check if we are inside
205 if (fFillColor && fFillStyle && fX[0] == fX[fLastPoint] && fY[0] == fY[fLastPoint]) {
206 if (TMath::IsInside(gPad->AbsPixeltoX(px),gPad->AbsPixeltoY(py),fLastPoint+1,fX,fY)) distance = 0;
207 }
208 return distance;
209}
210
211////////////////////////////////////////////////////////////////////////////////
212/// Draw this polyline with its current attributes.
213
215{
217}
218
219////////////////////////////////////////////////////////////////////////////////
220/// Draw this polyline with new coordinates.
221
223{
224 TPolyLine *newpolyline = new TPolyLine(n,x,y);
225 TAttLine::Copy(*newpolyline);
226 TAttFill::Copy(*newpolyline);
227 newpolyline->fOption = fOption;
228 newpolyline->SetBit(kCanDelete);
229 newpolyline->AppendPad(option);
230 return newpolyline;
231}
232
233////////////////////////////////////////////////////////////////////////////////
234/// Execute action corresponding to one event.
235///
236/// This member function is called when a polyline is clicked with the locator
237///
238/// If Left button clicked on one of the line end points, this point
239/// follows the cursor until button is released.
240///
241/// if Middle button clicked, the line is moved parallel to itself
242/// until the button is released.
243
245{
246 if (!gPad) return;
247
248 Int_t i, d;
249 Double_t xmin, xmax, ymin, ymax, dx, dy, dxr, dyr;
250 const Int_t kMaxDiff = 10;
251 static Bool_t middle;
252 static Int_t ipoint, pxp, pyp;
253 static Int_t px1,px2,py1,py2;
254 static Int_t pxold, pyold, px1old, py1old, px2old, py2old;
255 static Int_t dpx, dpy;
256 static std::vector<Int_t> x, y;
257 Bool_t opaque = gPad->OpaqueMoving();
258
259 if (!gPad->IsEditable()) return;
260
261 Int_t np = Size();
262
263 switch (event) {
264
265 case kButton1Down:
266 gVirtualX->SetLineColor(-1);
267 TAttLine::Modify(); //Change line attributes only if necessary
268 px1 = gPad->XtoAbsPixel(gPad->GetX1());
269 py1 = gPad->YtoAbsPixel(gPad->GetY1());
270 px2 = gPad->XtoAbsPixel(gPad->GetX2());
271 py2 = gPad->YtoAbsPixel(gPad->GetY2());
272 ipoint = -1;
273
274
275 if (!x.empty() || !y.empty()) break;
276 x.resize(np+1, 0);
277 y.resize(np+1, 0);
278 for (i=0;i<np;i++) {
279 pxp = gPad->XtoAbsPixel(gPad->XtoPad(fX[i]));
280 pyp = gPad->YtoAbsPixel(gPad->YtoPad(fY[i]));
281 if (!opaque) {
282 gVirtualX->DrawLine(pxp-4, pyp-4, pxp+4, pyp-4);
283 gVirtualX->DrawLine(pxp+4, pyp-4, pxp+4, pyp+4);
284 gVirtualX->DrawLine(pxp+4, pyp+4, pxp-4, pyp+4);
285 gVirtualX->DrawLine(pxp-4, pyp+4, pxp-4, pyp-4);
286 }
287 x[i] = pxp;
288 y[i] = pyp;
289 d = TMath::Abs(pxp-px) + TMath::Abs(pyp-py);
290 if (d < kMaxDiff) ipoint =i;
291 }
292 dpx = 0;
293 dpy = 0;
294 pxold = px;
295 pyold = py;
296 if (ipoint < 0) return;
297 if (ipoint == 0) {
298 px1old = 0;
299 py1old = 0;
300 px2old = gPad->XtoAbsPixel(fX[1]);
301 py2old = gPad->YtoAbsPixel(fY[1]);
302 } else if (ipoint == fN-1) {
303 px1old = gPad->XtoAbsPixel(gPad->XtoPad(fX[fN-2]));
304 py1old = gPad->YtoAbsPixel(gPad->YtoPad(fY[fN-2]));
305 px2old = 0;
306 py2old = 0;
307 } else {
308 px1old = gPad->XtoAbsPixel(gPad->XtoPad(fX[ipoint-1]));
309 py1old = gPad->YtoAbsPixel(gPad->YtoPad(fY[ipoint-1]));
310 px2old = gPad->XtoAbsPixel(gPad->XtoPad(fX[ipoint+1]));
311 py2old = gPad->YtoAbsPixel(gPad->YtoPad(fY[ipoint+1]));
312 }
313 pxold = gPad->XtoAbsPixel(gPad->XtoPad(fX[ipoint]));
314 pyold = gPad->YtoAbsPixel(gPad->YtoPad(fY[ipoint]));
315
316 break;
317
318
319 case kMouseMotion:
320
321 middle = kTRUE;
322 for (i=0;i<np;i++) {
323 pxp = gPad->XtoAbsPixel(gPad->XtoPad(fX[i]));
324 pyp = gPad->YtoAbsPixel(gPad->YtoPad(fY[i]));
325 d = TMath::Abs(pxp-px) + TMath::Abs(pyp-py);
326 if (d < kMaxDiff) middle = kFALSE;
327 }
328
329
330 // check if point is close to an axis
331 if (middle) gPad->SetCursor(kMove);
332 else gPad->SetCursor(kHand);
333 break;
334
335 case kButton1Motion:
336 if (!opaque) {
337 if (middle) {
338 for(i=0;i<np-1;i++) {
339 gVirtualX->DrawLine(x[i]+dpx, y[i]+dpy, x[i+1]+dpx, y[i+1]+dpy);
340 pxp = x[i]+dpx;
341 pyp = y[i]+dpy;
342 gVirtualX->DrawLine(pxp-4, pyp-4, pxp+4, pyp-4);
343 gVirtualX->DrawLine(pxp+4, pyp-4, pxp+4, pyp+4);
344 gVirtualX->DrawLine(pxp+4, pyp+4, pxp-4, pyp+4);
345 gVirtualX->DrawLine(pxp-4, pyp+4, pxp-4, pyp-4);
346 }
347 pxp = x[np-1]+dpx;
348 pyp = y[np-1]+dpy;
349 gVirtualX->DrawLine(pxp-4, pyp-4, pxp+4, pyp-4);
350 gVirtualX->DrawLine(pxp+4, pyp-4, pxp+4, pyp+4);
351 gVirtualX->DrawLine(pxp+4, pyp+4, pxp-4, pyp+4);
352 gVirtualX->DrawLine(pxp-4, pyp+4, pxp-4, pyp-4);
353 dpx += px - pxold;
354 dpy += py - pyold;
355 pxold = px;
356 pyold = py;
357 for(i=0;i<np-1;i++) {
358 gVirtualX->DrawLine(x[i]+dpx, y[i]+dpy, x[i+1]+dpx, y[i+1]+dpy);
359 pxp = x[i]+dpx;
360 pyp = y[i]+dpy;
361 gVirtualX->DrawLine(pxp-4, pyp-4, pxp+4, pyp-4);
362 gVirtualX->DrawLine(pxp+4, pyp-4, pxp+4, pyp+4);
363 gVirtualX->DrawLine(pxp+4, pyp+4, pxp-4, pyp+4);
364 gVirtualX->DrawLine(pxp-4, pyp+4, pxp-4, pyp-4);
365 }
366 pxp = x[np-1]+dpx;
367 pyp = y[np-1]+dpy;
368 gVirtualX->DrawLine(pxp-4, pyp-4, pxp+4, pyp-4);
369 gVirtualX->DrawLine(pxp+4, pyp-4, pxp+4, pyp+4);
370 gVirtualX->DrawLine(pxp+4, pyp+4, pxp-4, pyp+4);
371 gVirtualX->DrawLine(pxp-4, pyp+4, pxp-4, pyp-4);
372 } else {
373 if (px1old) gVirtualX->DrawLine(px1old, py1old, pxold, pyold);
374 if (px2old) gVirtualX->DrawLine(pxold, pyold, px2old, py2old);
375 gVirtualX->DrawLine(pxold-4, pyold-4, pxold+4, pyold-4);
376 gVirtualX->DrawLine(pxold+4, pyold-4, pxold+4, pyold+4);
377 gVirtualX->DrawLine(pxold+4, pyold+4, pxold-4, pyold+4);
378 gVirtualX->DrawLine(pxold-4, pyold+4, pxold-4, pyold-4);
379 pxold = px;
380 pxold = TMath::Max(pxold, px1);
381 pxold = TMath::Min(pxold, px2);
382 pyold = py;
383 pyold = TMath::Max(pyold, py2);
384 pyold = TMath::Min(pyold, py1);
385 if (px1old) gVirtualX->DrawLine(px1old, py1old, pxold, pyold);
386 if (px2old) gVirtualX->DrawLine(pxold, pyold, px2old, py2old);
387 gVirtualX->DrawLine(pxold-4, pyold-4, pxold+4, pyold-4);
388 gVirtualX->DrawLine(pxold+4, pyold-4, pxold+4, pyold+4);
389 gVirtualX->DrawLine(pxold+4, pyold+4, pxold-4, pyold+4);
390 gVirtualX->DrawLine(pxold-4, pyold+4, pxold-4, pyold-4);
391 }
392 } else {
393 if (middle) {
394 for(i=0;i<np-1;i++) {
395 pxp = x[i]+dpx;
396 pyp = y[i]+dpy;
397 }
398 pxp = x[np-1]+dpx;
399 pyp = y[np-1]+dpy;
400 dpx += px - pxold;
401 dpy += py - pyold;
402 pxold = px;
403 pyold = py;
404 } else {
405 pxold = px;
406 pxold = TMath::Max(pxold, px1);
407 pxold = TMath::Min(pxold, px2);
408 pyold = py;
409 pyold = TMath::Max(pyold, py2);
410 pyold = TMath::Min(pyold, py1);
411 }
412 if (!x.empty() && !y.empty()) {
413 if (middle) {
414 for(i=0;i<np;i++) {
415 fX[i] = gPad->PadtoX(gPad->AbsPixeltoX(x[i]+dpx));
416 fY[i] = gPad->PadtoY(gPad->AbsPixeltoY(y[i]+dpy));
417 }
418 } else {
419 fX[ipoint] = gPad->PadtoX(gPad->AbsPixeltoX(pxold));
420 fY[ipoint] = gPad->PadtoY(gPad->AbsPixeltoY(pyold));
421 }
422 }
423 gPad->Modified(kTRUE);
424 }
425 break;
426
427 case kButton1Up:
428
429 // Compute x,y range
430 xmin = gPad->GetUxmin();
431 xmax = gPad->GetUxmax();
432 ymin = gPad->GetUymin();
433 ymax = gPad->GetUymax();
434 dx = xmax-xmin;
435 dy = ymax-ymin;
436 dxr = dx/(1 - gPad->GetLeftMargin() - gPad->GetRightMargin());
437 dyr = dy/(1 - gPad->GetBottomMargin() - gPad->GetTopMargin());
438
439 // Range() could change the size of the pad pixmap and therefore should
440 // be called before the other paint routines
441 gPad->Range(xmin - dxr*gPad->GetLeftMargin(),
442 ymin - dyr*gPad->GetBottomMargin(),
443 xmax + dxr*gPad->GetRightMargin(),
444 ymax + dyr*gPad->GetTopMargin());
445 gPad->RangeAxis(xmin, ymin, xmax, ymax);
446
447 if (!x.empty() && !y.empty()) {
448 if (middle) {
449 for(i=0;i<np;i++) {
450 fX[i] = gPad->PadtoX(gPad->AbsPixeltoX(x[i]+dpx));
451 fY[i] = gPad->PadtoY(gPad->AbsPixeltoY(y[i]+dpy));
452 }
453 } else {
454 fX[ipoint] = gPad->PadtoX(gPad->AbsPixeltoX(pxold));
455 fY[ipoint] = gPad->PadtoY(gPad->AbsPixeltoY(pyold));
456 }
457 x.clear();
458 y.clear();
459 }
460 gPad->Modified(kTRUE);
461 gVirtualX->SetLineColor(-1);
462 }
463}
464
465////////////////////////////////////////////////////////////////////////////////
466/// List this polyline with its attributes.
467/// The option string is ignored.
468
470{
472 printf("TPolyLine N=%d\n",fN);
473}
474
475////////////////////////////////////////////////////////////////////////////////
476/// Merge polylines in the collection in this polyline
477
479{
480 if (!li) return 0;
481 TIter next(li);
482
483 //first loop to count the number of entries
484 TPolyLine *pl;
485 Int_t npoints = 0;
486 while ((pl = (TPolyLine*)next())) {
487 if (!pl->InheritsFrom(TPolyLine::Class())) {
488 Error("Add","Attempt to add object of class: %s to a %s",pl->ClassName(),this->ClassName());
489 return -1;
490 }
491 npoints += pl->Size();
492 }
493
494 //extend this polyline to hold npoints
495 if (npoints > 1) SetPoint(npoints-1,0,0);
496
497 //merge all polylines
498 next.Reset();
499 while ((pl = (TPolyLine*)next())) {
500 Int_t np = pl->Size();
501 Double_t *x = pl->GetX();
502 Double_t *y = pl->GetY();
503 for (Int_t i=0;i<np;i++) {
504 SetPoint(i,x[i],y[i]);
505 }
506 }
507
508 return npoints;
509}
510
511////////////////////////////////////////////////////////////////////////////////
512/// Paint this polyline with its current attributes.
513
515{
516 if (TestBit(kPolyLineNDC)) {
517 if (option && strlen(option)) PaintPolyLineNDC(fLastPoint+1, fX, fY, option);
519 } else {
520 if (option && strlen(option)) PaintPolyLine(fLastPoint+1, fX, fY, option);
522 }
523}
524
525////////////////////////////////////////////////////////////////////////////////
526/// Draw this polyline with new coordinates.
527///
528/// If option = 'f' or 'F' the fill area is drawn.
529/// The default is to draw the lines only.
530
532{
533 if (!gPad || n <= 0) return;
534 TAttLine::Modify(); //Change line attributes only if necessary
535 TAttFill::Modify(); //Change fill area attributes only if necessary
536 Double_t *xx = x;
537 Double_t *yy = y;
538 if (gPad->GetLogx()) {
539 xx = new Double_t[n];
540 for (Int_t ix=0;ix<n;ix++) xx[ix] = gPad->XtoPad(x[ix]);
541 }
542 if (gPad->GetLogy()) {
543 yy = new Double_t[n];
544 for (Int_t iy=0;iy<n;iy++) yy[iy] = gPad->YtoPad(y[iy]);
545 }
546 if (option && (*option == 'f' || *option == 'F'))
547 gPad->PaintFillArea(n, xx, yy, option);
548 else
549 gPad->PaintPolyLine(n, xx, yy, option);
550 if (x != xx)
551 delete[] xx;
552 if (y != yy)
553 delete[] yy;
554}
555
556////////////////////////////////////////////////////////////////////////////////
557/// Draw this polyline with new coordinates in NDC.
558
560{
561 TAttLine::Modify(); //Change line attributes only if necessary
562 TAttFill::Modify(); //Change fill area attributes only if necessary
563 if (*option == 'f' || *option == 'F') gPad->PaintFillAreaNDC(n,x,y,option);
564 else gPad->PaintPolyLineNDC(n,x,y,option);
565}
566
567////////////////////////////////////////////////////////////////////////////////
568/// Dump this polyline with its attributes.
569/// The option string is ignored.
570
572{
573 printf("PolyLine N=%d\n",fN);
574}
575
576////////////////////////////////////////////////////////////////////////////////
577/// Save primitive as a C++ statement(s) on output stream out
578
579void TPolyLine::SavePrimitive(std::ostream &out, Option_t *option /*= ""*/)
580{
581 char quote = '"';
582 out<<" "<<std::endl;
583 if (gROOT->ClassSaved(TPolyLine::Class()))
584 out<<" ";
585 else
586 out<<" TPolyLine *";
587
588 out<<"pline = new TPolyLine("<<fN<<","<<quote<<fOption<<quote<<");"<<std::endl;
589
590 SaveFillAttributes(out, "pline", 0, 1001);
591 SaveLineAttributes(out, "pline", 1, 1, 1);
592
593 for (Int_t i=0;i<Size();i++)
594 out<<" pline->SetPoint("<<i<<","<<fX[i]<<","<<fY[i]<<");"<<std::endl;
595
596 out<<" pline->Draw("<<quote<<option<<quote<<");"<<std::endl;
597}
598
599////////////////////////////////////////////////////////////////////////////////
600/// Set NDC mode on if isNDC = kTRUE, off otherwise
601
603{
605 if (isNDC) SetBit(kPolyLineNDC);
606}
607
608////////////////////////////////////////////////////////////////////////////////
609/// Set point following LastPoint to x, y.
610/// Returns index of the point (new last point).
611
613{
614 fLastPoint++;
616 return fLastPoint;
617}
618
619////////////////////////////////////////////////////////////////////////////////
620/// Set point number n to (x, y)
621/// If n is greater than the current size, the arrays are automatically
622/// extended.
623
625{
626 if (n < 0) return;
627 if (!fX || !fY || n >= fN) {
628 // re-allocate the object
629 Int_t newN = TMath::Max(2*fN,n+1);
630 Double_t *savex = new Double_t [newN];
631 Double_t *savey = new Double_t [newN];
632 if (fX && fN){
633 memcpy(savex,fX,fN*sizeof(Double_t));
634 memset(&savex[fN],0,(newN-fN)*sizeof(Double_t));
635 delete [] fX;
636 }
637 if (fY && fN){
638 memcpy(savey,fY,fN*sizeof(Double_t));
639 memset(&savey[fN],0,(newN-fN)*sizeof(Double_t));
640 delete [] fY;
641 }
642 fX = savex;
643 fY = savey;
644 fN = newN;
645 }
646 fX[n] = x;
647 fY[n] = y;
649}
650
651////////////////////////////////////////////////////////////////////////////////
652/// Resize this polyline to size n.
653/// If n <= 0 the current arrays of points are deleted.
654/// If n is greater than the current size, the new points are set to (0, 0)
655
657{
658 if (n <= 0) {
659 fN = 0;
660 fLastPoint = -1;
661 delete [] fX;
662 delete [] fY;
663 fX = fY = nullptr;
664 return;
665 }
666 if (n < fN) {
667 fN = n;
668 fLastPoint = n - 1;
669 } else {
670 SetPoint(n-1,0,0);
671 }
672}
673
674////////////////////////////////////////////////////////////////////////////////
675/// Set new values for this polyline (single precision).
676///
677/// If n <= 0 the current arrays of points are deleted.
678
680{
681 if (n <= 0) {
682 fN = 0;
683 fLastPoint = -1;
684 delete [] fX;
685 delete [] fY;
686 fX = fY = nullptr;
687 return;
688 }
689 fN =n;
690 if (fX) delete [] fX;
691 if (fY) delete [] fY;
692 fX = new Double_t[fN];
693 fY = new Double_t[fN];
694 for (Int_t i=0; i<fN;i++) {
695 if (x) fX[i] = (Double_t)x[i];
696 if (y) fY[i] = (Double_t)y[i];
697 }
698 fOption = option;
699 fLastPoint = fN-1;
700}
701
702////////////////////////////////////////////////////////////////////////////////
703/// Set new values for this polyline (double precision).
704///
705/// If n <= 0 the current arrays of points are deleted.
706
708{
709 if (n <= 0) {
710 fN = 0;
711 fLastPoint = -1;
712 delete [] fX;
713 delete [] fY;
714 fX = fY = nullptr;
715 return;
716 }
717 fN =n;
718 if (fX) delete [] fX;
719 if (fY) delete [] fY;
720 fX = new Double_t[fN];
721 fY = new Double_t[fN];
722 for (Int_t i=0; i<fN;i++) {
723 if (x) fX[i] = x[i];
724 if (y) fY[i] = y[i];
725 }
726 fOption = option;
727 fLastPoint = fN-1;
728}
729
730////////////////////////////////////////////////////////////////////////////////
731/// Stream a class object.
732
734{
735 if (b.IsReading()) {
736 UInt_t R__s, R__c;
737 Version_t R__v = b.ReadVersion(&R__s, &R__c);
738 if (R__v > 1) {
739 b.ReadClassBuffer(TPolyLine::Class(), this, R__v, R__s, R__c);
740 return;
741 }
742 //====process old versions before automatic schema evolution
746 b >> fN;
747 fX = new Double_t[fN];
748 fY = new Double_t[fN];
749 Float_t *x = new Float_t[fN];
750 Float_t *y = new Float_t[fN];
751 b.ReadFastArray(x,fN);
752 b.ReadFastArray(y,fN);
753 for (Int_t i=0;i<fN;i++) {
754 fX[i] = x[i];
755 fY[i] = y[i];
756 }
758 b.CheckByteCount(R__s, R__c, TPolyLine::IsA());
759 //====end of old versions
760
761 delete [] x;
762 delete [] y;
763 } else {
764 b.WriteClassBuffer(TPolyLine::Class(),this);
765 }
766}
@ kMouseMotion
Definition: Buttons.h:23
@ kButton1Motion
Definition: Buttons.h:20
@ kButton1Up
Definition: Buttons.h:19
@ kButton1Down
Definition: Buttons.h:17
@ kMove
Definition: GuiTypes.h:374
@ kHand
Definition: GuiTypes.h:374
#define d(i)
Definition: RSha256.hxx:102
short Version_t
Definition: RtypesCore.h:65
const Bool_t kFALSE
Definition: RtypesCore.h:101
float Float_t
Definition: RtypesCore.h:57
double Double_t
Definition: RtypesCore.h:59
const Bool_t kTRUE
Definition: RtypesCore.h:100
const char Option_t
Definition: RtypesCore.h:66
#define ClassImp(name)
Definition: Rtypes.h:375
Option_t Option_t option
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t Float_t Float_t b
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t Float_t Float_t Int_t Int_t UInt_t UInt_t Rectangle_t Int_t Int_t Window_t TString Int_t GCValues_t GetPrimarySelectionOwner GetDisplay GetScreen GetColormap GetNativeEvent const char const char dpyName wid window const char font_name cursor keysym reg const char only_if_exist regb h Point_t np
float xmin
Definition: THbookFile.cxx:95
float ymin
Definition: THbookFile.cxx:95
float xmax
Definition: THbookFile.cxx:95
float ymax
Definition: THbookFile.cxx:95
#define gROOT
Definition: TROOT.h:405
#define gPad
Definition: TVirtualPad.h:302
#define gVirtualX
Definition: TVirtualX.h:338
Fill Area Attributes class.
Definition: TAttFill.h:19
virtual void Streamer(TBuffer &)
void Copy(TAttFill &attfill) const
Copy this fill attributes to a new TAttFill.
Definition: TAttFill.cxx:204
virtual void Modify()
Change current fill area attributes if necessary.
Definition: TAttFill.cxx:213
Style_t fFillStyle
Fill area style.
Definition: TAttFill.h:23
Color_t fFillColor
Fill area color.
Definition: TAttFill.h:22
virtual void SaveFillAttributes(std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1001)
Save fill attributes as C++ statement(s) on output stream out.
Definition: TAttFill.cxx:236
Line Attributes class.
Definition: TAttLine.h:18
virtual void Streamer(TBuffer &)
virtual void Modify()
Change current line attributes if necessary.
Definition: TAttLine.cxx:245
void Copy(TAttLine &attline) const
Copy this line attributes to a new TAttLine.
Definition: TAttLine.cxx:175
Int_t DistancetoLine(Int_t px, Int_t py, Double_t xp1, Double_t yp1, Double_t xp2, Double_t yp2)
Compute distance from point px,py to a line.
Definition: TAttLine.cxx:209
virtual void SaveLineAttributes(std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1, Int_t widdef=1)
Save line attributes as C++ statement(s) on output stream out.
Definition: TAttLine.cxx:273
Buffer base class used for serializing objects.
Definition: TBuffer.h:43
Collection abstract base class.
Definition: TCollection.h:65
void Reset()
Definition: TCollection.h:254
Mother of all ROOT objects.
Definition: TObject.h:41
R__ALWAYS_INLINE Bool_t TestBit(UInt_t f) const
Definition: TObject.h:201
virtual void Streamer(TBuffer &)
Stream an object of class TObject.
Definition: TObject.cxx:882
virtual const char * ClassName() const
Returns name of class to which the object belongs.
Definition: TObject.cxx:207
virtual void AppendPad(Option_t *option="")
Append graphics object to current pad.
Definition: TObject.cxx:184
void SetBit(UInt_t f, Bool_t set)
Set or unset the user status bits as specified in f.
Definition: TObject.cxx:774
virtual Bool_t InheritsFrom(const char *classname) const
Returns kTRUE if object inherits from class "classname".
Definition: TObject.cxx:525
virtual void Copy(TObject &object) const
Copy this to obj.
Definition: TObject.cxx:140
virtual void Error(const char *method, const char *msgfmt,...) const
Issue error message.
Definition: TObject.cxx:969
void ResetBit(UInt_t f)
Definition: TObject.h:200
@ kCanDelete
if object in a list can be deleted
Definition: TObject.h:62
Defined by an array on N points in a 2-D space.
Definition: TPolyLine.h:23
TString fOption
options
Definition: TPolyLine.h:30
virtual Int_t Size() const
Definition: TPolyLine.h:71
Int_t fLastPoint
The index of the last filled point.
Definition: TPolyLine.h:27
virtual Int_t Merge(TCollection *list)
Merge polylines in the collection in this polyline.
Definition: TPolyLine.cxx:478
virtual void PaintPolyLineNDC(Int_t n, Double_t *x, Double_t *y, Option_t *option="")
Draw this polyline with new coordinates in NDC.
Definition: TPolyLine.cxx:559
void Copy(TObject &polyline) const override
Copy this polyline to polyline.
Definition: TPolyLine.cxx:140
Int_t DistancetoPrimitive(Int_t px, Int_t py) override
Returns closest distance in pixels from point (px, py) to a polyline.
Definition: TPolyLine.cxx:180
void SavePrimitive(std::ostream &out, Option_t *option="") override
Save primitive as a C++ statement(s) on output stream out.
Definition: TPolyLine.cxx:579
Double_t * GetX() const
Definition: TPolyLine.h:54
void ExecuteEvent(Int_t event, Int_t px, Int_t py) override
Execute action corresponding to one event.
Definition: TPolyLine.cxx:244
virtual void SetPoint(Int_t point, Double_t x, Double_t y)
Set point number n to (x, y) If n is greater than the current size, the arrays are automatically exte...
Definition: TPolyLine.cxx:624
virtual ~TPolyLine()
PolyLine default destructor.
Definition: TPolyLine.cxx:123
TPolyLine()
PolyLine default constructor.
Definition: TPolyLine.cxx:47
TClass * IsA() const override
Definition: TPolyLine.h:73
Double_t * GetY() const
Definition: TPolyLine.h:55
virtual void PaintPolyLine(Int_t n, Double_t *x, Double_t *y, Option_t *option="")
Draw this polyline with new coordinates.
Definition: TPolyLine.cxx:531
void Draw(Option_t *option="") override
Draw this polyline with its current attributes.
Definition: TPolyLine.cxx:214
Double_t * fX
[fN] Array of X coordinates
Definition: TPolyLine.h:28
static TClass * Class()
void Paint(Option_t *option="") override
Paint this polyline with its current attributes.
Definition: TPolyLine.cxx:514
void ls(Option_t *option="") const override
List this polyline with its attributes.
Definition: TPolyLine.cxx:469
TPolyLine & operator=(const TPolyLine &)
assignment operator
Definition: TPolyLine.cxx:113
void Streamer(TBuffer &) override
Stream a class object.
Definition: TPolyLine.cxx:733
virtual TPolyLine * DrawPolyLine(Int_t n, Double_t *x, Double_t *y, Option_t *option="")
Draw this polyline with new coordinates.
Definition: TPolyLine.cxx:222
Int_t fN
Number of points.
Definition: TPolyLine.h:26
Double_t * fY
[fN] Array of Y coordinates
Definition: TPolyLine.h:29
virtual void SetPolyLine(Int_t n)
Resize this polyline to size n.
Definition: TPolyLine.cxx:656
virtual void SetNDC(Bool_t isNDC=kTRUE)
Set NDC mode on if isNDC = kTRUE, off otherwise.
Definition: TPolyLine.cxx:602
virtual Int_t SetNextPoint(Double_t x, Double_t y)
Set point following LastPoint to x, y.
Definition: TPolyLine.cxx:612
void Print(Option_t *option="") const override
Dump this polyline with its attributes.
Definition: TPolyLine.cxx:571
@ kPolyLineNDC
Polyline coordinates are in NDC space.
Definition: TPolyLine.h:37
static void IndentLevel()
Functions used by ls() to indent an object hierarchy.
Definition: TROOT.cxx:2819
const char * Data() const
Definition: TString.h:369
virtual void Streamer(TBuffer &)
Stream a string object.
Definition: TString.cxx:1391
Double_t y[n]
Definition: legend1.C:17
Double_t x[n]
Definition: legend1.C:17
const Int_t n
Definition: legend1.C:16
Short_t Max(Short_t a, Short_t b)
Returns the largest of a and b.
Definition: TMathBase.h:250
Bool_t IsInside(T xp, T yp, Int_t np, T *x, T *y)
Function which returns kTRUE if point xp,yp lies inside the polygon defined by the np points in array...
Definition: TMath.h:1231
Short_t Min(Short_t a, Short_t b)
Returns the smallest of a and b.
Definition: TMathBase.h:198
Short_t Abs(Short_t d)
Returns the absolute value of parameter Short_t d.
Definition: TMathBase.h:123