forked from root-project/root
-
Notifications
You must be signed in to change notification settings - Fork 0
/
TCanvas.cxx
2298 lines (1927 loc) · 68.8 KB
/
TCanvas.cxx
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
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
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
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
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
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
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
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
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
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
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// @(#)root/gpad:$Id$
// Author: Rene Brun 12/12/94
/*************************************************************************
* Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
#include <string.h>
#include <stdlib.h>
#include "Riostream.h"
#include "TROOT.h"
#include "TCanvas.h"
#include "TClass.h"
#include "TStyle.h"
#include "TText.h"
#include "TBox.h"
#include "TCanvasImp.h"
#include "TDialogCanvas.h"
#include "TGuiFactory.h"
#include "TEnv.h"
#include "TError.h"
#include "TContextMenu.h"
#include "TControlBar.h"
#include "TInterpreter.h"
#include "TApplication.h"
#include "TColor.h"
#include "TVirtualPadEditor.h"
#include "TVirtualViewer3D.h"
#include "TPadPainter.h"
#include "TVirtualGL.h"
#include "TVirtualPS.h"
#include "TObjectSpy.h"
#include "TAxis.h"
#include "TView.h"
#include "TVirtualMutex.h"
class TCanvasInit {
public:
TCanvasInit() { TApplication::NeedGraphicsLibs(); }
};
static TCanvasInit gCanvasInit;
//*-*x16 macros/layout_canvas
Bool_t TCanvas::fgIsFolder = kFALSE;
const Size_t kDefaultCanvasSize = 20;
ClassImpQ(TCanvas)
////////////////////////////////////////////////////////////////////////////////
/* Begin_Html
<center><h2>The Canvas class</h2></center>
A Canvas is an area mapped to a window directly under the control of the display
manager. A ROOT session may have several canvases open at any given time.
<p>
A Canvas may be subdivided into independent graphical areas: the <b>Pads</b>.
A canvas has a default pad which has the name of the canvas itself.
An example of a Canvas layout is sketched in the picture below.
<pre>
***********************************************************************
* Menus bar for Canvas *
***********************************************************************
* *
* ************************************ ************************* *
* * * * * *
* * * * * *
* * * * * *
* * * * * *
* * * * * *
* * * * * *
* * Pad 1 * * Pad 2 * *
* * * * * *
* * * * * *
* * * * * *
* * * * * *
* * * * * *
* * * * * *
* ************************************ ************************* *
* *
***********************************************************************
</pre>
This canvas contains two pads named P1 and P2. Both Canvas, P1 and P2 can be
moved, grown, shrinked using the normal rules of the Display manager.
<p>
The image below shows a canvas with 4 pads:
<center>
<img src="gif/canvas_layout.gif">
</center>
Once objects have been drawn in a canvas, they can be edited/moved by pointing
directly to them. The cursor shape is changed to suggest the type of action that
one can do on this object. Clicking with the right mouse button on an object
pops-up a contextmenu with a complete list of actions possible on this object.
<p>
A graphical editor may be started from the canvas "View" menu under the menu
entry "Toolbar".
<p>
An interactive HELP is available by clicking on the HELP button at the top right
of the canvas. It gives a short explanation about the canvas' menus.
<p>
A canvas may be automatically divided into pads via <tt>TPad::Divide</tt>.
<p>
At creation time, in interactive mode, the canvas size defines the size of the
canvas window (including the window manager's decoration). To define precisely
the graphics area size of a canvas, the following four lines of code should be
used:
<pre>
{
Double_t w = 600;
Double_t h = 600;
TCanvas * c1 = new TCanvas("c", "c", w, h);
c->SetWindowSize(w + (w - c->GetWw()), h + (h - c->GetWh()));
}
</pre>
in batch mode simply do:
<pre>
c->SetCanvasSize(w,h);
</pre>
End_Html */
////////////////////////////////////////////////////////////////////////////////
/// Canvas default constructor.
TCanvas::TCanvas(Bool_t build) : TPad(), fDoubleBuffer(0)
{
fPainter = 0;
fUseGL = gStyle->GetCanvasPreferGL();
if (!build || TClass::IsCallingNew() != TClass::kRealNew) {
Constructor();
} else {
const char *defcanvas = gROOT->GetDefCanvasName();
char *cdef;
TList *lc = (TList*)gROOT->GetListOfCanvases();
if (lc->FindObject(defcanvas)) {
Int_t n = lc->GetSize()+1;
while (lc->FindObject(Form("%s_n%d",defcanvas,n))) n++;
cdef = StrDup(Form("%s_n%d",defcanvas,n));
} else {
cdef = StrDup(Form("%s",defcanvas));
}
Constructor(cdef, cdef, 1);
delete [] cdef;
}
}
////////////////////////////////////////////////////////////////////////////////
/// Canvas default constructor
void TCanvas::Constructor()
{
if (gThreadXAR) {
void *arr[2];
arr[1] = this;
if ((*gThreadXAR)("CANV", 2, arr, 0)) return;
}
fCanvas = 0;
fCanvasID = -1;
fCanvasImp = 0;
fBatch = kTRUE;
fUpdating = kFALSE;
fContextMenu = 0;
fSelected = 0;
fClickSelected = 0;
fSelectedPad = 0;
fClickSelectedPad = 0;
fPadSave = 0;
SetBit(kAutoExec);
SetBit(kShowEditor);
SetBit(kShowToolBar);
}
////////////////////////////////////////////////////////////////////////////////
/// Create an embedded canvas, i.e. a canvas that is in a TGCanvas widget
/// which is placed in a TGFrame. This ctor is only called via the
/// TRootEmbeddedCanvas class.
///
/// If "name" starts with "gl" the canvas is ready to receive GL output.
TCanvas::TCanvas(const char *name, Int_t ww, Int_t wh, Int_t winid) : TPad(), fDoubleBuffer(0)
{
fPainter = 0;
Init();
fCanvasID = winid;
fWindowTopX = 0;
fWindowTopY = 0;
fWindowWidth = ww;
fWindowHeight = wh;
fCw = ww + 4;
fCh = wh +28;
fBatch = kFALSE;
fUpdating = kFALSE;
//This is a very special ctor. A window exists already!
//Can create painter now.
fUseGL = gStyle->GetCanvasPreferGL();
if (fUseGL) {
fGLDevice = gGLManager->CreateGLContext(winid);
if (fGLDevice == -1)
fUseGL = kFALSE;
}
CreatePainter();
fCanvasImp = gBatchGuiFactory->CreateCanvasImp(this, name, fCw, fCh);
if (!fCanvasImp) return;
SetName(name);
Build();
}
////////////////////////////////////////////////////////////////////////////////
/// Create a new canvas with a predefined size form.
/// If form < 0 the menubar is not shown.
///
/// form = 1 700x500 at 10,10 (set by TStyle::SetCanvasDefH,W,X,Y)
/// form = 2 500x500 at 20,20
/// form = 3 500x500 at 30,30
/// form = 4 500x500 at 40,40
/// form = 5 500x500 at 50,50
///
/// If "name" starts with "gl" the canvas is ready to receive GL output.
TCanvas::TCanvas(const char *name, const char *title, Int_t form) : TPad(), fDoubleBuffer(0)
{
fPainter = 0;
fUseGL = gStyle->GetCanvasPreferGL();
Constructor(name, title, form);
}
////////////////////////////////////////////////////////////////////////////////
/// Create a new canvas with a predefined size form.
/// If form < 0 the menubar is not shown.
///
/// form = 1 700x500 at 10,10 (set by TStyle::SetCanvasDefH,W,X,Y)
/// form = 2 500x500 at 20,20
/// form = 3 500x500 at 30,30
/// form = 4 500x500 at 40,40
/// form = 5 500x500 at 50,50
void TCanvas::Constructor(const char *name, const char *title, Int_t form)
{
if (gThreadXAR) {
void *arr[6];
static Int_t ww = 500;
static Int_t wh = 500;
arr[1] = this; arr[2] = (void*)name; arr[3] = (void*)title; arr[4] =&ww; arr[5] = &wh;
if ((*gThreadXAR)("CANV", 6, arr, 0)) return;
}
Init();
SetBit(kMenuBar,1);
if (form < 0) {
form = -form;
SetBit(kMenuBar,0);
}
fCanvas = this;
fCanvasID = -1;
TCanvas *old = (TCanvas*)gROOT->GetListOfCanvases()->FindObject(name);
if (old && old->IsOnHeap()) {
Warning("Constructor","Deleting canvas with same name: %s",name);
delete old;
}
if (!name[0] || gROOT->IsBatch()) { //We are in Batch mode
fWindowTopX = fWindowTopY = 0;
if (form == 1) {
fWindowWidth = gStyle->GetCanvasDefW();
fWindowHeight = gStyle->GetCanvasDefH();
} else {
fWindowWidth = 500;
fWindowHeight = 500;
}
fCw = fWindowWidth;
fCh = fWindowHeight;
fCanvasImp = gBatchGuiFactory->CreateCanvasImp(this, name, fCw, fCh);
if (!fCanvasImp) return;
fBatch = kTRUE;
} else { //normal mode with a screen window
Float_t cx = gStyle->GetScreenFactor();
if (form < 1 || form > 5) form = 1;
if (form == 1) {
UInt_t uh = UInt_t(cx*gStyle->GetCanvasDefH());
UInt_t uw = UInt_t(cx*gStyle->GetCanvasDefW());
Int_t ux = Int_t(cx*gStyle->GetCanvasDefX());
Int_t uy = Int_t(cx*gStyle->GetCanvasDefY());
fCanvasImp = gGuiFactory->CreateCanvasImp(this, name, ux, uy, uw, uh);
}
fCw = 500;
fCh = 500;
if (form == 2) fCanvasImp = gGuiFactory->CreateCanvasImp(this, name, 20, 20, UInt_t(cx*500), UInt_t(cx*500));
if (form == 3) fCanvasImp = gGuiFactory->CreateCanvasImp(this, name, 30, 30, UInt_t(cx*500), UInt_t(cx*500));
if (form == 4) fCanvasImp = gGuiFactory->CreateCanvasImp(this, name, 40, 40, UInt_t(cx*500), UInt_t(cx*500));
if (form == 5) fCanvasImp = gGuiFactory->CreateCanvasImp(this, name, 50, 50, UInt_t(cx*500), UInt_t(cx*500));
if (!fCanvasImp) return;
if (!gROOT->IsBatch() && fCanvasID == -1)
fCanvasID = fCanvasImp->InitWindow();
fCanvasImp->ShowMenuBar(TestBit(kMenuBar));
fBatch = kFALSE;
}
CreatePainter();
SetName(name);
SetTitle(title); // requires fCanvasImp set
Build();
// Popup canvas
fCanvasImp->Show();
}
////////////////////////////////////////////////////////////////////////////////
/// Create a new canvas at a random position.
///
/// ww is the canvas size in pixels along X
/// (if ww < 0 the menubar is not shown)
/// wh is the canvas size in pixels along Y
///
/// If "name" starts with "gl" the canvas is ready to receive GL output.
TCanvas::TCanvas(const char *name, const char *title, Int_t ww, Int_t wh) : TPad(), fDoubleBuffer(0)
{
fPainter = 0;
fUseGL = gStyle->GetCanvasPreferGL();
Constructor(name, title, ww, wh);
}
////////////////////////////////////////////////////////////////////////////////
/// Create a new canvas at a random position.
///
/// ww is the canvas size in pixels along X
/// (if ww < 0 the menubar is not shown)
/// wh is the canvas size in pixels along Y
void TCanvas::Constructor(const char *name, const char *title, Int_t ww, Int_t wh)
{
if (gThreadXAR) {
void *arr[6];
arr[1] = this; arr[2] = (void*)name; arr[3] = (void*)title; arr[4] =&ww; arr[5] = &wh;
if ((*gThreadXAR)("CANV", 6, arr, 0)) return;
}
Init();
SetBit(kMenuBar,1);
if (ww < 0) {
ww = -ww;
SetBit(kMenuBar,0);
}
fCw = ww;
fCh = wh;
fCanvasID = -1;
TCanvas *old = (TCanvas*)gROOT->GetListOfCanvases()->FindObject(name);
if (old && old->IsOnHeap()) {
Warning("Constructor","Deleting canvas with same name: %s",name);
delete old;
}
if (!name[0] || gROOT->IsBatch()) { //We are in Batch mode
fWindowTopX = fWindowTopY = 0;
fWindowWidth = ww;
fWindowHeight = wh;
fCw = ww;
fCh = wh;
fCanvasImp = gBatchGuiFactory->CreateCanvasImp(this, name, fCw, fCh);
if (!fCanvasImp) return;
fBatch = kTRUE;
} else {
Float_t cx = gStyle->GetScreenFactor();
fCanvasImp = gGuiFactory->CreateCanvasImp(this, name, UInt_t(cx*ww), UInt_t(cx*wh));
if (!fCanvasImp) return;
if (!gROOT->IsBatch() && fCanvasID == -1)
fCanvasID = fCanvasImp->InitWindow();
fCanvasImp->ShowMenuBar(TestBit(kMenuBar));
fBatch = kFALSE;
}
CreatePainter();
SetName(name);
SetTitle(title); // requires fCanvasImp set
Build();
// Popup canvas
fCanvasImp->Show();
}
////////////////////////////////////////////////////////////////////////////////
/// Create a new canvas.
///
/// wtopx,wtopy are the pixel coordinates of the top left corner of
/// the canvas (if wtopx < 0) the menubar is not shown)
/// ww is the canvas size in pixels along X
/// wh is the canvas size in pixels along Y
///
/// If "name" starts with "gl" the canvas is ready to receive GL output.
TCanvas::TCanvas(const char *name, const char *title, Int_t wtopx, Int_t wtopy, Int_t ww, Int_t wh)
: TPad(), fDoubleBuffer(0)
{
fPainter = 0;
fUseGL = gStyle->GetCanvasPreferGL();
Constructor(name, title, wtopx, wtopy, ww, wh);
}
////////////////////////////////////////////////////////////////////////////////
/// Create a new canvas.
///
/// wtopx,wtopy are the pixel coordinates of the top left corner of
/// the canvas (if wtopx < 0) the menubar is not shown)
/// ww is the canvas size in pixels along X
/// wh is the canvas size in pixels along Y
void TCanvas::Constructor(const char *name, const char *title, Int_t wtopx,
Int_t wtopy, Int_t ww, Int_t wh)
{
if (gThreadXAR) {
void *arr[8];
arr[1] = this; arr[2] = (void*)name; arr[3] = (void*)title;
arr[4] = &wtopx; arr[5] = &wtopy; arr[6] = &ww; arr[7] = &wh;
if ((*gThreadXAR)("CANV", 8, arr, 0)) return;
}
Init();
SetBit(kMenuBar,1);
if (wtopx < 0) {
wtopx = -wtopx;
SetBit(kMenuBar,0);
}
fCw = ww;
fCh = wh;
fCanvasID = -1;
TCanvas *old = (TCanvas*)gROOT->GetListOfCanvases()->FindObject(name);
if (old && old->IsOnHeap()) {
Warning("Constructor","Deleting canvas with same name: %s",name);
delete old;
}
if (!name[0] || gROOT->IsBatch()) { //We are in Batch mode
fWindowTopX = fWindowTopY = 0;
fWindowWidth = ww;
fWindowHeight = wh;
fCw = ww;
fCh = wh;
fCanvasImp = gBatchGuiFactory->CreateCanvasImp(this, name, fCw, fCh);
if (!fCanvasImp) return;
fBatch = kTRUE;
} else { //normal mode with a screen window
Float_t cx = gStyle->GetScreenFactor();
fCanvasImp = gGuiFactory->CreateCanvasImp(this, name, Int_t(cx*wtopx), Int_t(cx*wtopy), UInt_t(cx*ww), UInt_t(cx*wh));
if (!fCanvasImp) return;
if (!gROOT->IsBatch() && fCanvasID == -1)
fCanvasID = fCanvasImp->InitWindow();
fCanvasImp->ShowMenuBar(TestBit(kMenuBar));
fBatch = kFALSE;
}
CreatePainter();
SetName(name);
SetTitle(title); // requires fCanvasImp set
Build();
// Popup canvas
fCanvasImp->Show();
}
////////////////////////////////////////////////////////////////////////////////
/// Initialize the TCanvas members. Called by all constructors.
void TCanvas::Init()
{
// Make sure the application environment exists. It is need for graphics
// (colors are initialized in the TApplication ctor).
if (!gApplication)
TApplication::CreateApplication();
// Load and initialize graphics libraries if
// TApplication::NeedGraphicsLibs() has been called by a
// library static initializer.
if (gApplication)
gApplication->InitializeGraphics();
// Get some default from .rootrc. Used in fCanvasImp->InitWindow().
fHighLightColor = gEnv->GetValue("Canvas.HighLightColor", kRed);
SetBit(kMoveOpaque, gEnv->GetValue("Canvas.MoveOpaque", 0));
SetBit(kResizeOpaque, gEnv->GetValue("Canvas.ResizeOpaque", 0));
if (gEnv->GetValue("Canvas.ShowEventStatus", kFALSE)) SetBit(kShowEventStatus);
if (gEnv->GetValue("Canvas.ShowToolTips", kFALSE)) SetBit(kShowToolTips);
if (gEnv->GetValue("Canvas.ShowToolBar", kFALSE)) SetBit(kShowToolBar);
if (gEnv->GetValue("Canvas.ShowEditor", kFALSE)) SetBit(kShowEditor);
if (gEnv->GetValue("Canvas.AutoExec", kTRUE)) SetBit(kAutoExec);
// Fill canvas ROOT data structure
fXsizeUser = 0;
fYsizeUser = 0;
fXsizeReal = kDefaultCanvasSize;
fYsizeReal = kDefaultCanvasSize;
fDISPLAY = "$DISPLAY";
fUpdating = kFALSE;
fRetained = kTRUE;
fSelected = 0;
fClickSelected = 0;
fSelectedX = 0;
fSelectedY = 0;
fSelectedPad = 0;
fClickSelectedPad= 0;
fPadSave = 0;
fEvent = -1;
fEventX = -1;
fEventY = -1;
fContextMenu = 0;
}
////////////////////////////////////////////////////////////////////////////////
/// Build a canvas. Called by all constructors.
void TCanvas::Build()
{
// Get window identifier
if (fCanvasID == -1 && fCanvasImp)
fCanvasID = fCanvasImp->InitWindow();
if (fCanvasID == -1) return;
if (fCw !=0 && fCh !=0) {
if (fCw < fCh) fXsizeReal = fYsizeReal*Float_t(fCw)/Float_t(fCh);
else fYsizeReal = fXsizeReal*Float_t(fCh)/Float_t(fCw);
}
// Set Pad parameters
gPad = this;
fCanvas = this;
fMother = (TPad*)gPad;
if (!IsBatch()) { //normal mode with a screen window
// Set default physical canvas attributes
//Should be done via gVirtualX, not via fPainter (at least now). No changes here.
gVirtualX->SelectWindow(fCanvasID);
gVirtualX->SetFillColor(1); //Set color index for fill area
gVirtualX->SetLineColor(1); //Set color index for lines
gVirtualX->SetMarkerColor(1); //Set color index for markers
gVirtualX->SetTextColor(1); //Set color index for text
// Clear workstation
gVirtualX->ClearWindow();
// Set Double Buffer on by default
SetDoubleBuffer(1);
// Get effective window parameters (with borders and menubar)
fCanvasImp->GetWindowGeometry(fWindowTopX, fWindowTopY,
fWindowWidth, fWindowHeight);
// Get effective canvas parameters without borders
Int_t dum1, dum2;
gVirtualX->GetGeometry(fCanvasID, dum1, dum2, fCw, fCh);
fContextMenu = new TContextMenu("ContextMenu");
} else {
// Make sure that batch interactive canvas sizes are the same
fCw -= 4;
fCh -= 28;
}
gROOT->GetListOfCanvases()->Add(this);
if (!fPrimitives) {
fPrimitives = new TList;
SetFillColor(gStyle->GetCanvasColor());
SetFillStyle(1001);
SetGrid(gStyle->GetPadGridX(),gStyle->GetPadGridY());
SetTicks(gStyle->GetPadTickX(),gStyle->GetPadTickY());
SetLogx(gStyle->GetOptLogx());
SetLogy(gStyle->GetOptLogy());
SetLogz(gStyle->GetOptLogz());
SetBottomMargin(gStyle->GetPadBottomMargin());
SetTopMargin(gStyle->GetPadTopMargin());
SetLeftMargin(gStyle->GetPadLeftMargin());
SetRightMargin(gStyle->GetPadRightMargin());
SetBorderSize(gStyle->GetCanvasBorderSize());
SetBorderMode(gStyle->GetCanvasBorderMode());
fBorderMode=gStyle->GetCanvasBorderMode(); // do not call SetBorderMode (function redefined in TCanvas)
SetPad(0, 0, 1, 1);
Range(0, 0, 1, 1); //pad range is set by default to [0,1] in x and y
TVirtualPadPainter *vpp = GetCanvasPainter();
if (vpp) vpp->SelectDrawable(fPixmapID);//gVirtualX->SelectPixmap(fPixmapID); //pixmap must be selected
PaintBorder(GetFillColor(), kTRUE); //paint background
}
// transient canvases have typically no menubar and should not get
// by default the event status bar (if set by default)
if (TestBit(kMenuBar) && fCanvasImp) {
if (TestBit(kShowEventStatus)) fCanvasImp->ShowStatusBar(kTRUE);
// ... and toolbar + editor
if (TestBit(kShowToolBar)) fCanvasImp->ShowToolBar(kTRUE);
if (TestBit(kShowEditor)) fCanvasImp->ShowEditor(kTRUE);
if (TestBit(kShowToolTips)) fCanvasImp->ShowToolTips(kTRUE);
}
}
////////////////////////////////////////////////////////////////////////////////
/// Canvas destructor
TCanvas::~TCanvas()
{
Destructor();
}
////////////////////////////////////////////////////////////////////////////////
/// Browse.
void TCanvas::Browse(TBrowser *b)
{
Draw();
cd();
if (fgIsFolder) fPrimitives->Browse(b);
}
////////////////////////////////////////////////////////////////////////////////
/// Actual canvas destructor.
void TCanvas::Destructor()
{
if (gThreadXAR) {
void *arr[2];
arr[1] = this;
if ((*gThreadXAR)("CDEL", 2, arr, 0)) return;
}
if (!TestBit(kNotDeleted)) return;
if (fContextMenu) { delete fContextMenu; fContextMenu = 0; }
if (!gPad) return;
Close();
//If not yet (batch mode?).
delete fPainter;
}
////////////////////////////////////////////////////////////////////////////////
/// Set current canvas & pad. Returns the new current pad,
/// or 0 in case of failure.
/// See TPad::cd() for an explanation of the parameter.
TVirtualPad *TCanvas::cd(Int_t subpadnumber)
{
if (fCanvasID == -1) return 0;
TPad::cd(subpadnumber);
// in case doublebuffer is off, draw directly onto display window
if (!IsBatch()) {
if (!fDoubleBuffer)
gVirtualX->SelectWindow(fCanvasID);//Ok, does not matter for glpad.
}
return gPad;
}
////////////////////////////////////////////////////////////////////////////////
/// Remove all primitives from the canvas.
/// If option "D" is specified, direct subpads are cleared but not deleted.
/// This option is not recursive, i.e. pads in direct subpads are deleted.
void TCanvas::Clear(Option_t *option)
{
if (fCanvasID == -1) return;
R__LOCKGUARD2(gROOTMutex);
TString opt = option;
opt.ToLower();
if (opt.Contains("d")) {
// clear subpads, but do not delete pads in case the canvas
// has been divided (note: option "D" is propagated so could cause
// conflicts for primitives using option "D" for something else)
if (fPrimitives) {
TIter next(fPrimitives);
TObject *obj;
while ((obj=next())) {
obj->Clear(option);
}
}
} else {
//default, clear everything in the canvas. Subpads are deleted
TPad::Clear(option); //Remove primitives from pad
}
fSelected = 0;
fClickSelected = 0;
fSelectedPad = 0;
fClickSelectedPad = 0;
}
////////////////////////////////////////////////////////////////////////////////
/// Emit pad Cleared signal.
void TCanvas::Cleared(TVirtualPad *pad)
{
Emit("Cleared(TVirtualPad*)", (Long_t)pad);
}
////////////////////////////////////////////////////////////////////////////////
/// Emit Closed signal.
void TCanvas::Closed()
{
Emit("Closed()");
}
////////////////////////////////////////////////////////////////////////////////
/// Close canvas.
///
/// Delete window/pads data structure
void TCanvas::Close(Option_t *option)
{
TPad *padsave = (TPad*)gPad;
TCanvas *cansave = 0;
if (padsave) cansave = (TCanvas*)gPad->GetCanvas();
if (fCanvasID != -1) {
if ((!gROOT->IsLineProcessing()) && (!gVirtualX->IsCmdThread())) {
gInterpreter->Execute(this, IsA(), "Close", option);
return;
}
R__LOCKGUARD2(gROOTMutex);
FeedbackMode(kFALSE);
cd();
TPad::Close(option);
if (!IsBatch()) {
gVirtualX->SelectWindow(fCanvasID); //select current canvas
DeleteCanvasPainter();
if (fCanvasImp) fCanvasImp->Close();
}
fCanvasID = -1;
fBatch = kTRUE;
gROOT->GetListOfCanvases()->Remove(this);
// Close actual window on screen
SafeDelete(fCanvasImp);
}
if (cansave == this) {
gPad = (TCanvas *) gROOT->GetListOfCanvases()->First();
} else {
gPad = padsave;
}
Closed();
}
////////////////////////////////////////////////////////////////////////////////
/// Copy the canvas pixmap of the pad to the canvas.
void TCanvas::CopyPixmaps()
{
if (!IsBatch()) {
CopyPixmap();
TPad::CopyPixmaps();
}
}
////////////////////////////////////////////////////////////////////////////////
/// Draw a canvas.
/// If a canvas with the name is already on the screen, the canvas is repainted.
/// This function is useful when a canvas object has been saved in a Root file.
/// One can then do:
/// Root > Tfile f("file.root");
/// Root > canvas.Draw();
void TCanvas::Draw(Option_t *)
{
// Load and initialize graphics libraries if
// TApplication::NeedGraphicsLibs() has been called by a
// library static initializer.
if (gApplication)
gApplication->InitializeGraphics();
TCanvas *old = (TCanvas*)gROOT->GetListOfCanvases()->FindObject(GetName());
if (old == this) {
Paint();
return;
}
if (old) { gROOT->GetListOfCanvases()->Remove(old); delete old;}
if (fWindowWidth == 0) {
if (fCw !=0) fWindowWidth = fCw+4;
else fWindowWidth = 800;
}
if (fWindowHeight == 0) {
if (fCh !=0) fWindowHeight = fCh+28;
else fWindowHeight = 600;
}
if (gROOT->IsBatch()) { //We are in Batch mode
fCanvasImp = gBatchGuiFactory->CreateCanvasImp(this, GetName(), fWindowWidth, fWindowHeight);
if (!fCanvasImp) return;
fBatch = kTRUE;
} else { //normal mode with a screen window
fCanvasImp = gGuiFactory->CreateCanvasImp(this, GetName(), fWindowTopX, fWindowTopY,
fWindowWidth, fWindowHeight);
if (!fCanvasImp) return;
fCanvasImp->ShowMenuBar(TestBit(kMenuBar));
}
Build();
ResizePad();
fCanvasImp->Show();
Modified();
}
////////////////////////////////////////////////////////////////////////////////
/// Draw a clone of this canvas
/// A new canvas is created that is a clone of this canvas
TObject *TCanvas::DrawClone(Option_t *option) const
{
const char *defcanvas = gROOT->GetDefCanvasName();
char *cdef;
TList *lc = (TList*)gROOT->GetListOfCanvases();
if (lc->FindObject(defcanvas))
cdef = Form("%s_n%d",defcanvas,lc->GetSize()+1);
else
cdef = Form("%s",defcanvas);
TCanvas *newCanvas = (TCanvas*)Clone();
newCanvas->SetName(cdef);
newCanvas->Draw(option);
newCanvas->Update();
return newCanvas;
}
////////////////////////////////////////////////////////////////////////////////
/// Draw a clone of this canvas into the current pad
/// In an interactive session, select the destination/current pad
/// with the middle mouse button, then point to the canvas area to select
/// the canvas context menu item DrawClonePad.
/// Note that the original canvas may have subpads.
TObject *TCanvas::DrawClonePad()
{
TPad *padsav = (TPad*)gPad;
TPad *selpad = (TPad*)gROOT->GetSelectedPad();
TPad *pad = padsav;
if (pad == this) pad = selpad;
if (padsav == 0 || pad == 0 || pad == this) {
TCanvas *newCanvas = (TCanvas*)DrawClone();
newCanvas->SetWindowSize(GetWindowWidth(),GetWindowHeight());
return newCanvas;
}
if (fCanvasID == -1) {
fCanvasImp = gGuiFactory->CreateCanvasImp(this, GetName(), fWindowTopX, fWindowTopY,
fWindowWidth, fWindowHeight);
if (!fCanvasImp) return 0;
fCanvasImp->ShowMenuBar(TestBit(kMenuBar));
fCanvasID = fCanvasImp->InitWindow();
}
this->cd();
TObject *obj, *clone;
//copy pad attributes
pad->Range(fX1,fY1,fX2,fY2);
pad->SetTickx(GetTickx());
pad->SetTicky(GetTicky());
pad->SetGridx(GetGridx());
pad->SetGridy(GetGridy());
pad->SetLogx(GetLogx());
pad->SetLogy(GetLogy());
pad->SetLogz(GetLogz());
pad->SetBorderSize(GetBorderSize());
pad->SetBorderMode(GetBorderMode());
TAttLine::Copy((TAttLine&)*pad);
TAttFill::Copy((TAttFill&)*pad);
TAttPad::Copy((TAttPad&)*pad);
//copy primitives
TIter next(GetListOfPrimitives());
while ((obj=next())) {
pad->cd();
clone = obj->Clone();
pad->GetListOfPrimitives()->Add(clone,next.GetOption());
}
pad->ResizePad();
pad->Modified();
pad->Update();
if (padsav) padsav->cd();
return 0;
}
////////////////////////////////////////////////////////////////////////////////
/// Report name and title of primitive below the cursor.
///
/// This function is called when the option "Event Status"
/// in the canvas menu "Options" is selected.
void TCanvas::DrawEventStatus(Int_t event, Int_t px, Int_t py, TObject *selected)
{
const Int_t kTMAX=256;
static char atext[kTMAX];
if (!TestBit(kShowEventStatus) || !selected) return;
if (!fCanvasImp) return; //this may happen when closing a TAttCanvas
TVirtualPad* savepad;
savepad = gPad;
gPad = GetSelectedPad();
fCanvasImp->SetStatusText(selected->GetTitle(),0);
fCanvasImp->SetStatusText(selected->GetName(),1);
if (event == kKeyPress)
snprintf(atext, kTMAX, "%c", (char) px);
else
snprintf(atext, kTMAX, "%d,%d", px, py);
fCanvasImp->SetStatusText(atext,2);
fCanvasImp->SetStatusText(selected->GetObjectInfo(px,py),3);
gPad = savepad;
}
////////////////////////////////////////////////////////////////////////////////
/// Get editor bar.
void TCanvas::EditorBar()
{
TVirtualPadEditor::GetPadEditor();
}
////////////////////////////////////////////////////////////////////////////////
/// Embedded a canvas into a TRootEmbeddedCanvas. This method is only called
/// via TRootEmbeddedCanvas::AdoptCanvas.
void TCanvas::EmbedInto(Int_t winid, Int_t ww, Int_t wh)
{
// If fCanvasImp already exists, no need to go further.
if(fCanvasImp) return;
fCanvasID = winid;
fWindowTopX = 0;
fWindowTopY = 0;
fWindowWidth = ww;
fWindowHeight = wh;
fCw = ww;
fCh = wh;
fBatch = kFALSE;
fUpdating = kFALSE;
fCanvasImp = gBatchGuiFactory->CreateCanvasImp(this, GetName(), fCw, fCh);
if (!fCanvasImp) return;
Build();
Resize();
}
////////////////////////////////////////////////////////////////////////////////
/// Generate kMouseEnter and kMouseLeave events depending on the previously
/// selected object and the currently selected object. Does nothing if the
/// selected object does not change.
void TCanvas::EnterLeave(TPad *prevSelPad, TObject *prevSelObj)
{
if (prevSelObj == fSelected) return;
TPad *padsav = (TPad *)gPad;
Int_t sevent = fEvent;
if (prevSelObj) {