-
-
Notifications
You must be signed in to change notification settings - Fork 3k
/
qgsvectorlayer.cpp
3273 lines (2793 loc) · 88.9 KB
/
qgsvectorlayer.cpp
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
/***************************************************************************
qgsvectorlayer.cpp
This class implements a generic means to display vector layers. The features
and attributes are read from the data store using a "data provider" plugin.
QgsVectorLayer can be used with any data store for which an appropriate
plugin is available.
-------------------
begin : Oct 29, 2003
copyright : (C) 2003 by Gary E.Sherman
email : sherman at mrcc.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
/* $Id$ */
#include <iostream>
#include <iosfwd>
#include <cfloat>
#include <cstring>
#include <cmath>
#include <sstream>
#include <memory>
#include <vector>
#include <utility>
#include <cassert>
#include <limits>
// for htonl
#ifdef WIN32
#include <winsock.h>
#else
#include <netinet/in.h>
#endif
#include <QApplication>
#include <QCursor>
#include <QLibrary>
#include <QMessageBox>
#include <QPainter>
#include <QPixmap>
#include <QPolygonF>
#include <QProgressDialog>
#include <QString>
#include <QSettings>
#include "qgis.h" //for globals
#include "qgisapp.h"
#include "qgsapplication.h"
#include "qgsattributedialog.h"
#include "qgsattributetable.h"
#include "qgsattributetabledisplay.h"
#include "qgscontinuouscolorrenderer.h"
#include "qgscoordinatetransform.h"
#include "qgsdistancearea.h"
#include "qgsfeature.h"
#include "qgsfield.h"
#include "qgsgraduatedsymbolrenderer.h"
#include "qgslabel.h"
#include "qgslabelattributes.h"
#include "qgslegend.h"
#include "qgslogger.h"
#include "qgsmaplayerregistry.h"
#include "qgsmaptopixel.h"
#include "qgspoint.h"
#include "qgsproject.h"
#include "qgsproviderregistry.h"
#include "qgsrect.h"
#include "qgsrect.h"
#include "qgsrenderer.h"
#include "qgsrenderitem.h"
#include "qgssinglesymbolrenderer.h"
#include "qgsspatialrefsys.h"
#include "qgsuniquevaluerenderer.h"
#include "qgsvectordataprovider.h"
#include "qgsvectorlayer.h"
#include "qgsvectorlayerproperties.h"
#ifdef Q_WS_X11
#include "qgsclipper.h"
#endif
//#include "wkbheader.h"
#ifdef TESTPROVIDERLIB
#include <dlfcn.h>
#endif
static const char * const ident_ = "$Id$";
// typedef for the QgsDataProvider class factory
typedef QgsDataProvider * create_it(const QString* uri);
QgsVectorLayer::QgsVectorLayer(QString vectorLayerPath,
QString baseName,
QString providerKey)
: QgsMapLayer(VECTOR, baseName, vectorLayerPath),
tabledisplay(0),
m_renderer(0),
mLabel(0),
m_propertiesDialog(0),
providerKey(providerKey),
valid(false),
myLib(0),
updateThreshold(0), // XXX better default value?
mMinimumScale(0),
mMaximumScale(0),
mScaleDependentRender(false),
mEditable(false),
mModified(false),
mToggleEditingAction(0)
{
// if we're given a provider type, try to create and bind one to this layer
if ( ! providerKey.isEmpty() )
{
setDataProvider( providerKey );
}
if(valid)
{
setCoordinateSystem();
// Default for the popup menu
popMenu = 0;
// Get the update threshold from user settings. We
// do this only on construction to avoid the penality of
// fetching this each time the layer is drawn. If the user
// changes the threshold from the preferences dialog, it will
// have no effect on existing layers
QSettings settings;
updateThreshold = settings.readNumEntry("Map/updateThreshold", 1000);
}
} // QgsVectorLayer ctor
QgsVectorLayer::~QgsVectorLayer()
{
QgsDebugMsg("In QgsVectorLayer destructor");
valid=false;
if(isEditable())
{
stopEditing();
}
if (tabledisplay)
{
tabledisplay->close();
delete tabledisplay;
}
if (m_renderer)
{
delete m_renderer;
}
if (m_propertiesDialog)
{
delete m_propertiesDialog;
}
// delete the provider object
delete dataProvider;
// delete the popu pmenu
delete popMenu;
// delete the provider lib pointer
delete myLib;
delete mLabel;
// Destroy and cached geometries and clear the references to them
for (std::map<int, QgsGeometry*>::iterator it = mCachedGeometries.begin();
it != mCachedGeometries.end();
++it )
{
delete (*it).second;
}
mCachedGeometries.clear();
}
QString QgsVectorLayer::storageType() const
{
if (dataProvider)
{
return dataProvider->storageType();
}
return 0;
}
QString QgsVectorLayer::capabilitiesString() const
{
if (dataProvider)
{
return dataProvider->capabilitiesString();
}
return 0;
}
int QgsVectorLayer::getProjectionSrid()
{
//delegate to the provider
if (valid)
{
QgsDebugMsg("Getting srid from provider...");
return dataProvider->getSrid();
}
else
{
return 0;
}
}
QString QgsVectorLayer::getProjectionWKT()
{
//delegate to the provider
if (valid)
{
return dataProvider->getProjectionWKT();
}
else
{
return NULL;
}
}
QString QgsVectorLayer::providerType()
{
return providerKey;
}
/**
* sets the preferred display field based on some fuzzy logic
*/
void QgsVectorLayer::setDisplayField(QString fldName)
{
// If fldName is provided, use it as the display field, otherwise
// determine the field index for the feature column of the identify
// dialog. We look for fields containing "name" first and second for
// fields containing "id". If neither are found, the first field
// is used as the node.
QString idxName="";
QString idxId="";
std::vector < QgsField > fields = dataProvider->fields();
if(!fldName.isEmpty())
{
// find the index for this field
fieldIndex = fldName;
/*
for(int i = 0; i < fields.size(); i++)
{
if(QString(fields[i].name()) == fldName)
{
fieldIndex = i;
break;
}
}
*/
}
else
{
int fieldsSize = fields.size();
for (int j = 0; j < fieldsSize; j++)
{
QString fldName = fields[j].name();
QgsDebugMsg("Checking field " + fldName + " of " + QString::number(fields.size()) + " total");
// Check the fields and keep the first one that matches.
// We assume that the user has organized the data with the
// more "interesting" field names first. As such, name should
// be selected before oldname, othername, etc.
if (fldName.find("name", false) > -1)
{
if(idxName.isEmpty())
{
idxName = fldName;
}
}
if (fldName.find("descrip", false) > -1)
{
if(idxName.isEmpty())
{
idxName = fldName;
}
}
if (fldName.find("id", false) > -1)
{
if(idxId.isEmpty())
{
idxId = fldName;
}
}
}
//if there were no fields in the dbf just return - otherwise qgis segfaults!
if (fields.size() == 0) return;
if (idxName.length() > 0)
{
fieldIndex = idxName;
}
else
{
if (idxId.length() > 0)
{
fieldIndex = idxId;
}
else
{
fieldIndex = fields[0].name();
}
}
// set this to be the label field as well
setLabelField(fieldIndex);
}
}
void QgsVectorLayer::drawLabels(QPainter * p, QgsRect * viewExtent, QgsMapToPixel * theMapToPixelTransform)
{
drawLabels(p, viewExtent, theMapToPixelTransform, 1.);
}
// NOTE this is a temporary method added by Tim to prevent label clipping
// which was occurring when labeller was called in the main draw loop
// This method will probably be removed again in the near future!
void QgsVectorLayer::drawLabels(QPainter * p, QgsRect * viewExtent, QgsMapToPixel * theMapToPixelTransform, double scale)
{
QgsDebugMsg("Starting draw of labels");
if ( /*1 == 1 */ m_renderer && mLabelOn)
{
bool projectionsEnabledFlag = projectionsEnabled();
std::list<int> attributes=m_renderer->classificationAttributes();
// Add fields required for labels
mLabel->addRequiredFields ( &attributes );
QgsDebugMsg("Selecting features based on view extent");
int featureCount = 0;
// select the records in the extent. The provider sets a spatial filter
// and sets up the selection set for retrieval
dataProvider->reset();
dataProvider->select(viewExtent);
try
{
//main render loop
QgsFeature *fet;
while((fet = dataProvider->getNextFeature(attributes)))
{
// Render label
if ( fet != 0 )
{
if(mDeleted.find(fet->featureId())==mDeleted.end())//don't render labels of deleted features
{
bool sel=mSelected.find(fet->featureId()) != mSelected.end();
mLabel->renderLabel ( p, viewExtent, *mCoordinateTransform,
projectionsEnabledFlag,
theMapToPixelTransform, fet, sel, 0, scale);
}
}
delete fet;
featureCount++;
}
//render labels of not-commited features
//XXX changed from std::vector to std::list in merge from 0.7 to head (TS)
for(std::vector<QgsFeature*>::iterator it=mAddedFeatures.begin();it!=mAddedFeatures.end();++it)
{
bool sel=mSelected.find((*it)->featureId()) != mSelected.end();
mLabel->renderLabel ( p, viewExtent, *mCoordinateTransform, projectionsEnabledFlag,
theMapToPixelTransform, *it, sel, 0, scale);
}
}
catch (QgsCsException &e)
{
QgsLogger::critical("Error projecting label locations, caught in " + QString(__FILE__) + ", line " +QString(__LINE__));
}
#ifdef QGISDEBUG
QgsLogger::debug("Total features processed", featureCount, 1, __FILE__, __FUNCTION__, __LINE__);
#endif
// XXX Something in our draw event is triggering an additional draw event when resizing [TE 01/26/06]
// XXX Calling this will begin processing the next draw event causing image havoc and recursion crashes.
//qApp->processEvents();
}
}
QgsRect QgsVectorLayer::inverseProjectRect(const QgsRect& r) const
{
// Undo a coordinate transformation if one was in effect
if (projectionsEnabled())
{
try
{
QgsPoint p1 = mCoordinateTransform->transform(r.xMin(), r.yMin(),
QgsCoordinateTransform::INVERSE);
QgsPoint p2 = mCoordinateTransform->transform(r.xMax(), r.yMax(),
QgsCoordinateTransform::INVERSE);
#ifdef QGISDEBUG
QgsDebugMsg("Projections are enabled");
QgsDebugMsg("Rectangle was: "+r.stringRep(true));
QgsRect tt(p1, p2);
QgsDebugMsg("Inverse transformed to: "+tt.stringRep(true))
#endif
return QgsRect(p1, p2);
}
catch (QgsCsException &e)
{
QgsLogger::critical("Inverse transform error in " + QString(__FILE__) + ", line " + QString(__LINE__));
}
}
// fall through for all failures
return QgsRect(r);
}
unsigned char* QgsVectorLayer::drawLineString(unsigned char* feature,
QPainter* p,
QgsMapToPixel* mtp,
bool projectionsEnabledFlag)
{
unsigned char *ptr = feature + 5;
unsigned int nPoints = *((int*)ptr);
ptr = feature + 9;
std::vector<double> x(nPoints);
std::vector<double> y(nPoints);
std::vector<double> z(nPoints, 0.0);
// Extract the points from the WKB format into the x and y vectors.
for (register unsigned int i = 0; i < nPoints; ++i)
{
x[i] = *((double *) ptr);
ptr += sizeof(double);
y[i] = *((double *) ptr);
ptr += sizeof(double);
}
// Transform the points into map coordinates (and reproject if
// necessary)
transformPoints(x, y, z, mtp, projectionsEnabledFlag);
#if defined(Q_WS_X11)
// Work around a +/- 32768 limitation on coordinates in X11
// Look through the x and y coordinates and see if there are any
// that need trimming. If one is found, there's no need to look at
// the rest of them so end the loop at that point.
for (register unsigned int i = 0; i < nPoints; ++i)
if (std::abs(x[i]) > QgsClipper::maxX ||
std::abs(y[i]) > QgsClipper::maxY)
{
QgsClipper::trimFeature(x, y, true); // true = polyline
nPoints = x.size(); // trimming may change nPoints.
break;
}
#endif
// set up QPolygonF class with transformed points
QPolygonF pa(nPoints);
for (register unsigned int i = 0; i < nPoints; ++i)
{
pa[i].setX(x[i]);
pa[i].setY(y[i]);
}
#ifdef QGISDEBUGVERBOSE
// this is only used for verbose debug output
for (int i = 0; i < pa.size(); ++i)
{
QgsDebugMsgLevel("pa" + QString::number(pa.point(i).x()), 2);
QgsDebugMsgLevel("pa" + QString::number(pa.point(i).y()), 2);
}
#endif
// The default pen gives bevelled joins between segements of the
// polyline, which is good enough for the moment.
//preserve a copy of the pen before we start fiddling with it
QPen pen = p->pen(); // to be kept original
//
// experimental alpha transparency
// 255 = opaque
//
QPen myTransparentPen = p->pen(); // store current pen
QColor myColor = myTransparentPen.color();
myColor.setAlpha(transparencyLevelInt);
myTransparentPen.setColor(myColor);
p->setPen(myTransparentPen);
p->drawPolyline(pa);
//restore the pen
p->setPen(pen);
return ptr;
}
unsigned char* QgsVectorLayer::drawPolygon(unsigned char* feature,
QPainter* p,
QgsMapToPixel* mtp,
bool projectionsEnabledFlag)
{
typedef std::pair<std::vector<double>, std::vector<double> > ringType;
typedef ringType* ringTypePtr;
typedef std::vector<ringTypePtr> ringsType;
// get number of rings in the polygon
unsigned int numRings = *((int*)(feature + 1 + sizeof(int)));
if ( numRings == 0 ) // sanity check for zero rings in polygon
return feature + 9;
int total_points = 0;
// A vector containing a pointer to a pair of double vectors.The
// first vector in the pair contains the x coordinates, and the
// second the y coordinates.
ringsType rings;
// Set pointer to the first ring
unsigned char* ptr = feature + 1 + 2 * sizeof(int);
for (register unsigned int idx = 0; idx < numRings; idx++)
{
unsigned int nPoints = *((int*)ptr);
ringTypePtr ring = new ringType(std::vector<double>(nPoints),
std::vector<double>(nPoints));
ptr += 4;
// create a dummy vector for the z coordinate
std::vector<double> zVector(nPoints, 0.0);
// Extract the points from the WKB and store in a pair of
// vectors.
/*
#ifdef QGISDEBUG
std::cerr << "Points for ring " << idx << " ("
<< nPoints << " points)\n";
#endif
*/
for (register unsigned int jdx = 0; jdx < nPoints; jdx++)
{
ring->first[jdx] = *((double *) ptr);
ptr += sizeof(double);
ring->second[jdx] = *((double *) ptr);
ptr += sizeof(double);
/*
#ifdef QGISDEBUG
std::cerr << jdx << ": "
<< ring->first[jdx] << ", " << ring->second[jdx] << '\n';
#endif
*/
}
// If ring has fewer than two points, what is it then?
// Anyway, this check prevents a crash
if (nPoints < 1)
{
QgsDebugMsg("Ring has only " + QString::number(nPoints) + " points! Skipping this ring.");
continue;
}
transformPoints(ring->first, ring->second, zVector, mtp, projectionsEnabledFlag);
#if defined(Q_WS_X11)
// Work around a +/- 32768 limitation on coordinates in X11
// Look through the x and y coordinates and see if there are any
// that need trimming. If one is found, there's no need to look at
// the rest of them so end the loop at that point.
for (register unsigned int i = 0; i < nPoints; ++i)
{
if (std::abs(ring->first[i]) > QgsClipper::maxX ||
std::abs(ring->second[i]) > QgsClipper::maxY)
{
QgsClipper::trimFeature(ring->first, ring->second, false);
/*
#ifdef QGISDEBUG
std::cerr << "Trimmed points (" << ring->first.size() << ")\n";
for (int i = 0; i < ring->first.size(); ++i)
std::cerr << i << ": " << ring->first[i]
<< ", " << ring->second[i] << '\n';
#endif
*/
break;
}
//std::cout << "POLYGONTRANSFORM: " << ring->first[i] << ", " << ring->second[i] << std::endl;
}
#endif
// Don't bother keeping the ring if it has been trimmed out of
// existence.
if (ring->first.size() == 0)
delete ring;
else
{
rings.push_back(ring);
total_points += ring->first.size();
}
}
// Now we draw the polygons
// Only try to draw polygons if there is something to draw
if (total_points > 0)
{
int ii = 0;
QPointF outerRingPt;
// Stores the start index of each ring (first) and the number
// of points in each ring (second).
typedef std::vector<std::pair<unsigned int, unsigned int> > ringDetailType;
ringDetailType ringDetails;
// Need to copy the polygon vertices into a QPologynF for the
// QPainter::drawpolygon() call. The size is the sum of points in
// the polygon plus one extra point for each ring except for the
// first ring.
// Store size here and use it in the loop to avoid penalty of
// multiple calls to size()
int numRings = rings.size();
QPolygonF pa(total_points + numRings - 1);
for (register int i = 0; i < numRings; ++i)
{
// Store the pointer in a variable with a short name so as to make
// the following code easier to type and read.
ringTypePtr r = rings[i];
// only do this once to avoid penalty of additional calls
unsigned ringSize = r->first.size();
// Store the start index of this ring, and the number of
// points in the ring.
ringDetails.push_back(std::make_pair(ii, ringSize));
// Transfer points to the array of QPointF
for (register unsigned int j = 0; j != ringSize; ++j, ++ii)
{
// there is maybe a bug in Qt4.1: when using doubles without rounding,
// I've experienced crashes (broken pipe) when drawing polygon
// with more than 3000 vertices [MD]
pa[ii].setX(static_cast<int>(r->first[j] + 0.5));
pa[ii].setY(static_cast<int>(r->second[j] + 0.5));
// pa[ii].setX(r->first[j]);
// pa[ii].setY(r->second[j]);
}
// Store the last point of the first ring, and insert it at
// the end of all other rings. This makes all the other rings
// appear as holes in the first ring.
if (i == 0)
{
outerRingPt.setX(pa[ii-1].x());
outerRingPt.setY(pa[ii-1].y());
}
else
pa[ii++] = outerRingPt;
// Tidy up the pointed to pairs of vectors as we finish with them
delete rings[i];
}
#ifdef QGISDEBUGVERBOSE
// this is only for verbose debug output -- no optimzation is
// needed :)
QgsDebugMsg("Pixel points are:");
for (int i = 0; i < pa.size(); ++i)
{
QgsDebugMsgLevel("i" + QString::number(i), 2);
QgsDebugMsgLevel("pa[i].x()" + QString::number(pa[i].x()), 2);
QgsDebugMsgLevel("pa[i].y()" + QString::number(pa[i].y()), 2);
}
std::cerr << "Ring positions are:\n";
QgsDebugMsg("Ring positions are:");
for (int i = 0; i < ringDetails.size(); ++i)
{
QgsDebugMsgLevel("ringDetails[i].first" + QString::number(ringDetails[i].first), 2);
QgsDebugMsgLevel("ringDetails[i].second" + QString::number(ringDetails[i].second), 2);
}
QgsDebugMsg("Outer ring point is " + QString::number(outerRingPt.x()) + ", " + QString::number(outerRingPt.y()));
#endif
/*
// A bit of code to aid in working out what values of
// QgsClipper::minX, etc cause the X11 zoom bug.
int largestX = -std::numeric_limits<int>::max();
int smallestX = std::numeric_limits<int>::max();
int largestY = -std::numeric_limits<int>::max();
int smallestY = std::numeric_limits<int>::max();
for (int i = 0; i < pa.size(); ++i)
{
largestX = std::max(largestX, pa.point(i).x());
smallestX = std::min(smallestX, pa.point(i).x());
largestY = std::max(largestY, pa.point(i).y());
smallestY = std::min(smallestY, pa.point(i).y());
}
std::cerr << "Largest X coordinate was " << largestX << '\n';
std::cerr << "Smallest X coordinate was " << smallestX << '\n';
std::cerr << "Largest Y coordinate was " << largestY << '\n';
std::cerr << "Smallest Y coordinate was " << smallestY << '\n';
*/
//preserve a copy of the brush and pen before we start fiddling with it
QBrush brush = p->brush(); //to be kept as original
QPen pen = p->pen(); // to be kept original
//
// experimental alpha transparency
// 255 = opaque
//
QBrush myTransparentBrush = p->brush();
QColor myColor = brush.color();
myColor.setAlpha(transparencyLevelInt);
myTransparentBrush.setColor(myColor);
QPen myTransparentPen = p->pen(); // store current pen
myColor = myTransparentPen.color();
myColor.setAlpha(transparencyLevelInt);
myTransparentPen.setColor(myColor);
//
// draw the polygon fill
//
p->setBrush(myTransparentBrush);
p->setPen ( Qt::NoPen ); // no boundary
p->drawPolygon( pa );
// draw the polygon outline. Draw each ring as a separate
// polygon to avoid the lines associated with the outerRingPt.
p->setBrush ( Qt::NoBrush );
p->setPen (myTransparentPen);
ringDetailType::const_iterator ri = ringDetails.begin();
for (; ri != ringDetails.end(); ++ri)
p->drawPolygon(pa.constData() + ri->first, ri->second, Qt::OddEvenFill);
//
//restore brush and pen to original
//
p->setBrush ( brush );
p->setPen ( pen );
} // totalPoints > 0
return ptr;
}
bool QgsVectorLayer::draw(QPainter * p, QgsRect * viewExtent, QgsMapToPixel * theMapToPixelTransform)
{
draw ( p, viewExtent, theMapToPixelTransform, 1., 1.);
return TRUE; // Assume success always
}
void QgsVectorLayer::draw(QPainter * p, QgsRect * viewExtent, QgsMapToPixel * theMapToPixelTransform,
double widthScale, double symbolScale)
{
if(m_renderer)
{
// painter is active (begin has been called
/* Steps to draw the layer
1. get the features in the view extent by SQL query
2. read WKB for a feature
3. transform
4. draw
*/
QPen pen;
/*Pointer to a marker image*/
QPixmap marker;
/*Scale factor of the marker image*/
double markerScaleFactor=1.;
// Destroy all cached geometries and clear the references to them
if(mEditable)
{
// Destroy all cached geometries and clear the references to them
for (std::map<int, QgsGeometry*>::iterator it = mCachedGeometries.begin(); it != mCachedGeometries.end(); ++it )
{
delete (*it).second;
}
mCachedGeometries.clear();
}
dataProvider->reset();
dataProvider->select(viewExtent);
dataProvider->updateFeatureCount();
int totalFeatures = dataProvider->featureCount();
int featureCount = 0;
QgsFeature *fet;
bool projectionsEnabledFlag = projectionsEnabled();
std::list<int> attributes=m_renderer->classificationAttributes();
mDrawingCancelled=false; //pressing esc will change this to true
/*
QTime t;
t.start();
*/
try
{
while (fet = dataProvider->getNextFeature(attributes, updateThreshold))
{
// XXX Something in our draw event is triggering an additional draw event when resizing [TE 01/26/06]
// XXX Calling this will begin processing the next draw event causing image havoc and recursion crashes.
//qApp->processEvents(); //so we can trap for esc press
if (mDrawingCancelled) return;
// If update threshold is greater than 0, check to see if
// the threshold has been exceeded
if(updateThreshold > 0)
{
// signal progress in drawing
if(0 == featureCount % updateThreshold)
emit drawingProgress(featureCount, totalFeatures);
}
if (fet == 0)
{
QgsDebugMsg("get next feature returned null");
continue;
}
if(mEditable)
{
if (mDeleted.find(fet->featureId()) != mDeleted.end())
{
continue; //dont't draw feature marked as deleted
}
if (mChangedGeometries.find(fet->featureId()) != mChangedGeometries.end())
{
// substitute the committed geometry with the modified one
fet->setGeometry( mChangedGeometries[ fet->featureId() ] );
}
// Cache this for the use of (e.g.) modifying the feature's uncommitted geometry.
mCachedGeometries[fet->featureId()] = fet->geometryAndOwnership();
}
//check if feature is selected
bool sel=mSelected.find(fet->featureId()) != mSelected.end();
m_renderer->renderFeature(p, fet, &marker, &markerScaleFactor, sel, widthScale );
double scale = markerScaleFactor * symbolScale;
drawFeature(p,fet,theMapToPixelTransform,&marker, scale, projectionsEnabledFlag);
++featureCount;
delete fet;
}
//also draw the not yet commited features
if(mEditable)
{
for(std::vector<QgsFeature*>::iterator it = mAddedFeatures.begin(); it != mAddedFeatures.end(); ++it)
{
bool sel=mSelected.find((*it)->featureId()) != mSelected.end();
m_renderer->renderFeature(p, *it, &marker, &markerScaleFactor, sel, widthScale);
double scale = markerScaleFactor * symbolScale;
if (mChangedGeometries.find((*it)->featureId()) != mChangedGeometries.end())
{
(*it)->setGeometry( mChangedGeometries[(*it)->featureId() ] );
}
//give a deep copy of the geometry to mCachedGeometry because it will be erased at each redraw
QgsGeometry* deepCopy = new QgsGeometry(*((*it)->geometry()));
mCachedGeometries.insert(std::make_pair((*it)->featureId(), deepCopy));
drawFeature(p,*it,theMapToPixelTransform,&marker,scale, projectionsEnabledFlag);
}
}
}
catch (QgsCsException &cse)
{
QString msg("Failed to transform a point while drawing a feature of type '"
+ fet->typeName() + "'. Ignoring this feature.");
msg += cse.what();
qWarning(msg.toLocal8Bit().data());
}
QgsDebugMsg("Total features processed is " + QString::number(featureCount));
// XXX Something in our draw event is triggering an additional draw event when resizing [TE 01/26/06]
// XXX Calling this will begin processing the next draw event causing image havoc and recursion crashes.
//qApp->processEvents();
}
else
{
QgsLogger::warning("QgsRenderer is null in QgsVectorLayer::draw()");
}
}
QgsVectorLayer::endian_t QgsVectorLayer::endian()
{
// char *chkEndian = new char[4];
// memset(chkEndian, '\0', 4);
// chkEndian[0] = 0xE8;
// int *ce = (int *) chkEndian;
// int retVal;
// if (232 == *ce)
// retVal = NDR;
// else
// retVal = XDR;
// delete [] chkEndian;
return (htonl(1) == 1) ? QgsVectorLayer::XDR : QgsVectorLayer::NDR ;
}
void QgsVectorLayer::cacheGeometries()
{
for(std::map<int, QgsGeometry*>::iterator it = mCachedGeometries.begin(); it != mCachedGeometries.end(); ++it)
{
delete it->second;
}
mCachedGeometries.clear();
if(dataProvider)
{
QgsFeature* f = 0;
while(f = dataProvider->getNextFeature(false))
{
mCachedGeometries.insert(std::make_pair(f->featureId(), f->geometryAndOwnership()));
}
}
}
void QgsVectorLayer::table()
{
if (tabledisplay)
{
tabledisplay->raise();
// Give the table the most recent copy of the actions for this
// layer.
tabledisplay->table()->setAttributeActions(mActions);
}
else
{
// display the attribute table
QApplication::setOverrideCursor(Qt::waitCursor);
tabledisplay = new QgsAttributeTableDisplay(this);
connect(tabledisplay, SIGNAL(deleted()), this, SLOT(invalidateTableDisplay()));
tabledisplay->table()->fillTable(this);
tabledisplay->table()->setSorting(true);
tabledisplay->setTitle(tr("Attribute table - ") + name());
tabledisplay->show();
tabledisplay->table()->clearSelection(); //deselect the first row
// Give the table the most recent copy of the actions for this
// layer.
tabledisplay->table()->setAttributeActions(mActions);
QObject::disconnect(tabledisplay->table(), SIGNAL(selectionChanged()), tabledisplay->table(), SLOT(handleChangedSelections()));
for (std::set<int>::iterator it = mSelected.begin(); it != mSelected.end(); ++it)
{
tabledisplay->table()->selectRowWithId(*it);//todo: avoid that the table gets repainted during each selection
#ifdef QGISDEBUG
qWarning(("selecting row with id " + QString::number(*it)).toLocal8Bit().data());
#endif
}
QObject::connect(tabledisplay->table(), SIGNAL(selectionChanged()), tabledisplay->table(), SLOT(handleChangedSelections()));
//etablish the necessary connections between the table and the shapefilelayer
QObject::connect(tabledisplay->table(), SIGNAL(selected(int)), this, SLOT(select(int)));
QObject::connect(tabledisplay->table(), SIGNAL(selectionRemoved()), this, SLOT(removeSelection()));
QObject::connect(tabledisplay->table(), SIGNAL(repaintRequested()), this, SLOT(triggerRepaint()));
QApplication::restoreOverrideCursor();
}
} // QgsVectorLayer::table
void QgsVectorLayer::select(int number)
{
mSelected.insert(number);
emit selectionChanged();
}
void QgsVectorLayer::select(QgsRect * rect, bool lock)
{
QApplication::setOverrideCursor(Qt::WaitCursor);
// normalize the rectangle
rect->normalize();
if (tabledisplay)
{
QObject::disconnect(tabledisplay->table(), SIGNAL(selectionChanged()), tabledisplay->table(), SLOT(handleChangedSelections()));
QObject::disconnect(tabledisplay->table(), SIGNAL(selected(int)), this, SLOT(select(int))); //disconnecting because of performance reason
}