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 | 1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
49×
49×
1×
1×
34×
34×
34×
34×
34×
34×
34×
34×
34×
34×
34×
34×
33×
2×
6×
6×
6×
6×
6×
31×
31×
31×
9×
22×
16×
6×
6×
31×
102×
102×
78×
24×
102×
34×
34×
34×
34×
34×
34×
34×
34×
34×
34×
34×
34×
34×
1×
1×
34×
34×
1×
42×
42×
1×
183×
183×
4×
4×
179×
61×
118×
183×
1×
59×
56×
56×
3×
2×
2×
2×
2×
2×
1×
1×
58×
58×
58×
58×
58×
58×
58×
58×
53×
53×
25×
25×
6×
28×
3×
25×
11×
14×
53×
58×
1×
114×
55×
59×
114×
1×
56×
56×
56×
56×
56×
9×
47×
47×
47×
56×
20×
20×
26×
26×
26×
26×
26×
26×
26×
26×
26×
20×
20×
56×
1×
59×
59×
32×
32×
27×
27×
27×
1×
27×
27×
27×
6×
21×
6×
6×
15×
15×
3×
27×
9×
27×
27×
27×
27×
1×
27×
27×
27×
1×
55×
55×
55×
55×
55×
55×
31×
31×
31×
9×
24×
24×
55×
55×
55×
55×
55×
55×
55×
55×
55×
55×
2×
2×
2×
2×
2×
53×
35×
35×
35×
55×
1×
18×
18×
18×
18×
18×
18×
6×
6×
6×
6×
6×
12×
12×
12×
12×
12×
12×
18×
18×
1×
1×
20×
20×
20×
20×
20×
20×
5×
5×
15×
6×
6×
6×
20×
1×
19×
1×
18×
2×
20×
20×
20×
20×
1×
36×
36×
36×
27×
27×
27×
27×
36×
1×
2×
2×
2×
2×
2×
2×
2×
2×
2×
2×
2×
2×
1×
1×
134×
134×
102×
134×
58×
134×
132×
134×
134×
134×
1×
50×
50×
50×
16×
50×
1×
1×
3×
3×
3×
3×
3×
3×
3×
3×
1×
34×
34×
9×
25×
16×
9×
6×
3×
3×
34×
34×
1×
1×
| goog.provide('ol.interaction.Draw');
goog.provide('ol.interaction.DrawEvent');
goog.provide('ol.interaction.DrawEventType');
goog.provide('ol.interaction.DrawGeometryFunctionType');
goog.provide('ol.interaction.DrawMode');
goog.require('goog.asserts');
goog.require('goog.events');
goog.require('goog.events.Event');
goog.require('ol.Collection');
goog.require('ol.Coordinate');
goog.require('ol.Feature');
goog.require('ol.MapBrowserEvent');
goog.require('ol.MapBrowserEvent.EventType');
goog.require('ol.Object');
goog.require('ol.coordinate');
goog.require('ol.events.condition');
goog.require('ol.geom.Circle');
goog.require('ol.geom.GeometryType');
goog.require('ol.geom.LineString');
goog.require('ol.geom.MultiLineString');
goog.require('ol.geom.MultiPoint');
goog.require('ol.geom.MultiPolygon');
goog.require('ol.geom.Point');
goog.require('ol.geom.Polygon');
goog.require('ol.geom.SimpleGeometry');
goog.require('ol.interaction.InteractionProperty');
goog.require('ol.interaction.Pointer');
goog.require('ol.layer.Vector');
goog.require('ol.source.Vector');
/**
* @enum {string}
*/
ol.interaction.DrawEventType = {
/**
* Triggered upon feature draw start
* @event ol.interaction.DrawEvent#drawstart
* @api stable
*/
DRAWSTART: 'drawstart',
/**
* Triggered upon feature draw end
* @event ol.interaction.DrawEvent#drawend
* @api stable
*/
DRAWEND: 'drawend'
};
/**
* @classdesc
* Events emitted by {@link ol.interaction.Draw} instances are instances of
* this type.
*
* @constructor
* @extends {goog.events.Event}
* @implements {oli.DrawEvent}
* @param {ol.interaction.DrawEventType} type Type.
* @param {ol.Feature} feature The feature drawn.
*/
ol.interaction.DrawEvent = function(type, feature) {
goog.base(this, type);
/**
* The feature being drawn.
* @type {ol.Feature}
* @api stable
*/
this.feature = feature;
};
goog.inherits(ol.interaction.DrawEvent, goog.events.Event);
/**
* @classdesc
* Interaction for drawing feature geometries.
*
* @constructor
* @extends {ol.interaction.Pointer}
* @fires ol.interaction.DrawEvent
* @param {olx.interaction.DrawOptions} options Options.
* @api stable
*/
ol.interaction.Draw = function(options) {
goog.base(this, {
handleDownEvent: ol.interaction.Draw.handleDownEvent_,
handleEvent: ol.interaction.Draw.handleEvent,
handleUpEvent: ol.interaction.Draw.handleUpEvent_
});
/**
* @type {ol.Pixel}
* @private
*/
this.downPx_ = null;
/**
* @type {boolean}
* @private
*/
this.freehand_ = false;
/**
* Target source for drawn features.
* @type {ol.source.Vector}
* @private
*/
this.source_ = options.source ? options.source : null;
/**
* Target collection for drawn features.
* @type {ol.Collection.<ol.Feature>}
* @private
*/
this.features_ = options.features ? options.features : null;
/**
* Pixel distance for snapping.
* @type {number}
* @private
*/
this.snapTolerance_ = options.snapTolerance ? options.snapTolerance : 12;
/**
* Geometry type.
* @type {ol.geom.GeometryType}
* @private
*/
this.type_ = options.type;
/**
* Drawing mode (derived from geometry type.
* @type {ol.interaction.DrawMode}
* @private
*/
this.mode_ = ol.interaction.Draw.getMode_(this.type_);
/**
* The number of points that must be drawn before a polygon ring or line
* string can be finished. The default is 3 for polygon rings and 2 for
* line strings.
* @type {number}
* @private
*/
this.minPoints_ = options.minPoints ?
options.minPoints :
(this.mode_ === ol.interaction.DrawMode.POLYGON ? 3 : 2);
/**
* The number of points that can be drawn before a polygon ring or line string
* is finished. The default is no restriction.
* @type {number}
* @private
*/
this.maxPoints_ = options.maxPoints ? options.maxPoints : Infinity;
var geometryFunction = options.geometryFunction;
if (!geometryFunction) {
if (this.type_ === ol.geom.GeometryType.CIRCLE) {
/**
* @param {ol.Coordinate|Array.<ol.Coordinate>|Array.<Array.<ol.Coordinate>>} coordinates
* @param {ol.geom.SimpleGeometry=} opt_geometry
* @return {ol.geom.SimpleGeometry}
*/
geometryFunction = function(coordinates, opt_geometry) {
var circle = opt_geometry ? opt_geometry :
new ol.geom.Circle([NaN, NaN]);
goog.asserts.assertInstanceof(circle, ol.geom.Circle,
'geometry must be an ol.geom.Circle');
var squaredLength = ol.coordinate.squaredDistance(
coordinates[0], coordinates[1]);
circle.setCenterAndRadius(coordinates[0], Math.sqrt(squaredLength));
return circle;
};
} else {
var Constructor;
var mode = this.mode_;
if (mode === ol.interaction.DrawMode.POINT) {
Constructor = ol.geom.Point;
} else if (mode === ol.interaction.DrawMode.LINE_STRING) {
Constructor = ol.geom.LineString;
} else Eif (mode === ol.interaction.DrawMode.POLYGON) {
Constructor = ol.geom.Polygon;
}
/**
* @param {ol.Coordinate|Array.<ol.Coordinate>|Array.<Array.<ol.Coordinate>>} coordinates
* @param {ol.geom.SimpleGeometry=} opt_geometry
* @return {ol.geom.SimpleGeometry}
*/
geometryFunction = function(coordinates, opt_geometry) {
var geometry = opt_geometry;
if (geometry) {
geometry.setCoordinates(coordinates);
} else {
geometry = new Constructor(coordinates);
}
return geometry;
};
}
}
/**
* @type {ol.interaction.DrawGeometryFunctionType}
* @private
*/
this.geometryFunction_ = geometryFunction;
/**
* Finish coordinate for the feature (first point for polygons, last point for
* linestrings).
* @type {ol.Coordinate}
* @private
*/
this.finishCoordinate_ = null;
/**
* Sketch feature.
* @type {ol.Feature}
* @private
*/
this.sketchFeature_ = null;
/**
* Sketch point.
* @type {ol.Feature}
* @private
*/
this.sketchPoint_ = null;
/**
* Sketch coordinates. Used when drawing a line or polygon.
* @type {ol.Coordinate|Array.<ol.Coordinate>|Array.<Array.<ol.Coordinate>>}
* @private
*/
this.sketchCoords_ = null;
/**
* Sketch line. Used when drawing polygon.
* @type {ol.Feature}
* @private
*/
this.sketchLine_ = null;
/**
* Sketch line coordinates. Used when drawing a polygon or circle.
* @type {Array.<ol.Coordinate>}
* @private
*/
this.sketchLineCoords_ = null;
/**
* Squared tolerance for handling up events. If the squared distance
* between a down and up event is greater than this tolerance, up events
* will not be handled.
* @type {number}
* @private
*/
this.squaredClickTolerance_ = options.clickTolerance ?
options.clickTolerance * options.clickTolerance : 36;
/**
* Draw overlay where our sketch features are drawn.
* @type {ol.layer.Vector}
* @private
*/
this.overlay_ = new ol.layer.Vector({
source: new ol.source.Vector({
useSpatialIndex: false,
wrapX: options.wrapX ? options.wrapX : false
}),
style: options.style ? options.style :
ol.interaction.Draw.getDefaultStyleFunction()
});
/**
* Name of the geometry attribute for newly created features.
* @type {string|undefined}
* @private
*/
this.geometryName_ = options.geometryName;
/**
* @private
* @type {ol.events.ConditionType}
*/
this.condition_ = options.condition ?
options.condition : ol.events.condition.noModifierKeys;
/**
* @private
* @type {ol.events.ConditionType}
*/
this.freehandCondition_ = options.freehandCondition ?
options.freehandCondition : ol.events.condition.shiftKeyOnly;
goog.events.listen(this,
ol.Object.getChangeEventType(ol.interaction.InteractionProperty.ACTIVE),
this.updateState_, false, this);
};
goog.inherits(ol.interaction.Draw, ol.interaction.Pointer);
/**
* @return {ol.style.StyleFunction} Styles.
*/
ol.interaction.Draw.getDefaultStyleFunction = function() {
var styles = ol.style.createDefaultEditingStyles();
return function(feature, resolution) {
return styles[feature.getGeometry().getType()];
};
};
/**
* @inheritDoc
*/
ol.interaction.Draw.prototype.setMap = function(map) {
goog.base(this, 'setMap', map);
this.updateState_();
};
/**
* Handles the {@link ol.MapBrowserEvent map browser event} and may actually
* draw or finish the drawing.
* @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
* @return {boolean} `false` to stop event propagation.
* @this {ol.interaction.Draw}
* @api
*/
ol.interaction.Draw.handleEvent = function(mapBrowserEvent) {
var pass = !this.freehand_;
if (this.freehand_ &&
mapBrowserEvent.type === ol.MapBrowserEvent.EventType.POINTERDRAG) {
this.addToDrawing_(mapBrowserEvent);
pass = false;
} else if (mapBrowserEvent.type ===
ol.MapBrowserEvent.EventType.POINTERMOVE) {
pass = this.handlePointerMove_(mapBrowserEvent);
} else Iif (mapBrowserEvent.type === ol.MapBrowserEvent.EventType.DBLCLICK) {
pass = false;
}
return ol.interaction.Pointer.handleEvent.call(this, mapBrowserEvent) && pass;
};
/**
* @param {ol.MapBrowserPointerEvent} event Event.
* @return {boolean} Start drag sequence?
* @this {ol.interaction.Draw}
* @private
*/
ol.interaction.Draw.handleDownEvent_ = function(event) {
if (this.condition_(event)) {
this.downPx_ = event.pixel;
return true;
} else if ((this.mode_ === ol.interaction.DrawMode.LINE_STRING ||
this.mode_ === ol.interaction.DrawMode.POLYGON) &&
this.freehandCondition_(event)) {
this.downPx_ = event.pixel;
this.freehand_ = true;
Eif (!this.finishCoordinate_) {
this.startDrawing_(event);
}
return true;
} else {
return false;
}
};
/**
* @param {ol.MapBrowserPointerEvent} event Event.
* @return {boolean} Stop drag sequence?
* @this {ol.interaction.Draw}
* @private
*/
ol.interaction.Draw.handleUpEvent_ = function(event) {
this.freehand_ = false;
var downPx = this.downPx_;
var clickPx = event.pixel;
var dx = downPx[0] - clickPx[0];
var dy = downPx[1] - clickPx[1];
var squaredDistance = dx * dx + dy * dy;
var pass = true;
if (squaredDistance <= this.squaredClickTolerance_) {
this.handlePointerMove_(event);
if (!this.finishCoordinate_) {
this.startDrawing_(event);
if (this.mode_ === ol.interaction.DrawMode.POINT) {
this.finishDrawing();
}
} else if (this.mode_ === ol.interaction.DrawMode.CIRCLE) {
this.finishDrawing();
} else if (this.atFinish_(event)) {
this.finishDrawing();
} else {
this.addToDrawing_(event);
}
pass = false;
}
return pass;
};
/**
* Handle move events.
* @param {ol.MapBrowserEvent} event A move event.
* @return {boolean} Pass the event to other interactions.
* @private
*/
ol.interaction.Draw.prototype.handlePointerMove_ = function(event) {
if (this.finishCoordinate_) {
this.modifyDrawing_(event);
} else {
this.createOrUpdateSketchPoint_(event);
}
return true;
};
/**
* Determine if an event is within the snapping tolerance of the start coord.
* @param {ol.MapBrowserEvent} event Event.
* @return {boolean} The event is within the snapping tolerance of the start.
* @private
*/
ol.interaction.Draw.prototype.atFinish_ = function(event) {
var at = false;
Eif (this.sketchFeature_) {
var potentiallyDone = false;
var potentiallyFinishCoordinates = [this.finishCoordinate_];
if (this.mode_ === ol.interaction.DrawMode.LINE_STRING) {
potentiallyDone = this.sketchCoords_.length > this.minPoints_;
} else Eif (this.mode_ === ol.interaction.DrawMode.POLYGON) {
potentiallyDone = this.sketchCoords_[0].length >
this.minPoints_;
potentiallyFinishCoordinates = [this.sketchCoords_[0][0],
this.sketchCoords_[0][this.sketchCoords_[0].length - 2]];
}
if (potentiallyDone) {
var map = event.map;
for (var i = 0, ii = potentiallyFinishCoordinates.length; i < ii; i++) {
var finishCoordinate = potentiallyFinishCoordinates[i];
var finishPixel = map.getPixelFromCoordinate(finishCoordinate);
var pixel = event.pixel;
var dx = pixel[0] - finishPixel[0];
var dy = pixel[1] - finishPixel[1];
var freehand = this.freehand_ && this.freehandCondition_(event);
var snapTolerance = freehand ? 1 : this.snapTolerance_;
at = Math.sqrt(dx * dx + dy * dy) <= snapTolerance;
if (at) {
this.finishCoordinate_ = finishCoordinate;
break;
}
}
}
}
return at;
};
/**
* @param {ol.MapBrowserEvent} event Event.
* @private
*/
ol.interaction.Draw.prototype.createOrUpdateSketchPoint_ = function(event) {
var coordinates = event.coordinate.slice();
if (!this.sketchPoint_) {
this.sketchPoint_ = new ol.Feature(new ol.geom.Point(coordinates));
this.updateSketchFeatures_();
} else {
var sketchPointGeom = this.sketchPoint_.getGeometry();
goog.asserts.assertInstanceof(sketchPointGeom, ol.geom.Point,
'sketchPointGeom should be an ol.geom.Point');
sketchPointGeom.setCoordinates(coordinates);
}
};
/**
* Start the drawing.
* @param {ol.MapBrowserEvent} event Event.
* @private
*/
ol.interaction.Draw.prototype.startDrawing_ = function(event) {
var start = event.coordinate;
this.finishCoordinate_ = start;
if (this.mode_ === ol.interaction.DrawMode.POINT) {
this.sketchCoords_ = start.slice();
} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
this.sketchCoords_ = [[start.slice(), start.slice()]];
this.sketchLineCoords_ = this.sketchCoords_[0];
} else {
this.sketchCoords_ = [start.slice(), start.slice()];
if (this.mode_ === ol.interaction.DrawMode.CIRCLE) {
this.sketchLineCoords_ = this.sketchCoords_;
}
}
if (this.sketchLineCoords_) {
this.sketchLine_ = new ol.Feature(
new ol.geom.LineString(this.sketchLineCoords_));
}
var geometry = this.geometryFunction_(this.sketchCoords_);
goog.asserts.assert(geometry !== undefined, 'geometry should be defined');
this.sketchFeature_ = new ol.Feature();
if (this.geometryName_) {
this.sketchFeature_.setGeometryName(this.geometryName_);
}
this.sketchFeature_.setGeometry(geometry);
this.updateSketchFeatures_();
this.dispatchEvent(new ol.interaction.DrawEvent(
ol.interaction.DrawEventType.DRAWSTART, this.sketchFeature_));
};
/**
* Modify the drawing.
* @param {ol.MapBrowserEvent} event Event.
* @private
*/
ol.interaction.Draw.prototype.modifyDrawing_ = function(event) {
var coordinate = event.coordinate;
var geometry = this.sketchFeature_.getGeometry();
goog.asserts.assertInstanceof(geometry, ol.geom.SimpleGeometry,
'geometry should be ol.geom.SimpleGeometry or subclass');
var coordinates, last;
Iif (this.mode_ === ol.interaction.DrawMode.POINT) {
last = this.sketchCoords_;
} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
coordinates = this.sketchCoords_[0];
last = coordinates[coordinates.length - 1];
if (this.atFinish_(event)) {
// snap to finish
coordinate = this.finishCoordinate_.slice();
}
} else {
coordinates = this.sketchCoords_;
last = coordinates[coordinates.length - 1];
}
last[0] = coordinate[0];
last[1] = coordinate[1];
goog.asserts.assert(this.sketchCoords_, 'sketchCoords_ expected');
this.geometryFunction_(this.sketchCoords_, geometry);
Eif (this.sketchPoint_) {
var sketchPointGeom = this.sketchPoint_.getGeometry();
goog.asserts.assertInstanceof(sketchPointGeom, ol.geom.Point,
'sketchPointGeom should be an ol.geom.Point');
sketchPointGeom.setCoordinates(coordinate);
}
var sketchLineGeom;
if (geometry instanceof ol.geom.Polygon &&
this.mode_ !== ol.interaction.DrawMode.POLYGON) {
Iif (!this.sketchLine_) {
this.sketchLine_ = new ol.Feature(new ol.geom.LineString(null));
}
var ring = geometry.getLinearRing(0);
sketchLineGeom = this.sketchLine_.getGeometry();
goog.asserts.assertInstanceof(sketchLineGeom, ol.geom.LineString,
'sketchLineGeom must be an ol.geom.LineString');
sketchLineGeom.setFlatCoordinates(
ring.getLayout(), ring.getFlatCoordinates());
} else if (this.sketchLineCoords_) {
sketchLineGeom = this.sketchLine_.getGeometry();
goog.asserts.assertInstanceof(sketchLineGeom, ol.geom.LineString,
'sketchLineGeom must be an ol.geom.LineString');
sketchLineGeom.setCoordinates(this.sketchLineCoords_);
}
this.updateSketchFeatures_();
};
/**
* Add a new coordinate to the drawing.
* @param {ol.MapBrowserEvent} event Event.
* @private
*/
ol.interaction.Draw.prototype.addToDrawing_ = function(event) {
var coordinate = event.coordinate;
var geometry = this.sketchFeature_.getGeometry();
goog.asserts.assertInstanceof(geometry, ol.geom.SimpleGeometry,
'geometry must be an ol.geom.SimpleGeometry');
var done;
var coordinates;
if (this.mode_ === ol.interaction.DrawMode.LINE_STRING) {
this.finishCoordinate_ = coordinate.slice();
coordinates = this.sketchCoords_;
coordinates.push(coordinate.slice());
done = coordinates.length > this.maxPoints_;
this.geometryFunction_(coordinates, geometry);
} else Eif (this.mode_ === ol.interaction.DrawMode.POLYGON) {
coordinates = this.sketchCoords_[0];
coordinates.push(coordinate.slice());
done = coordinates.length > this.maxPoints_;
Iif (done) {
this.finishCoordinate_ = coordinates[0];
}
this.geometryFunction_(this.sketchCoords_, geometry);
}
this.updateSketchFeatures_();
Iif (done) {
this.finishDrawing();
}
};
/**
* Remove last point of the feature currently being drawn.
* @api
*/
ol.interaction.Draw.prototype.removeLastPoint = function() {
var geometry = this.sketchFeature_.getGeometry();
goog.asserts.assertInstanceof(geometry, ol.geom.SimpleGeometry,
'geometry must be an ol.geom.SimpleGeometry');
var coordinates, sketchLineGeom;
if (this.mode_ === ol.interaction.DrawMode.LINE_STRING) {
coordinates = this.sketchCoords_;
coordinates.splice(-2, 1);
this.geometryFunction_(coordinates, geometry);
} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
coordinates = this.sketchCoords_[0];
coordinates.splice(-2, 1);
sketchLineGeom = this.sketchLine_.getGeometry();
goog.asserts.assertInstanceof(sketchLineGeom, ol.geom.LineString,
'sketchLineGeom must be an ol.geom.LineString');
sketchLineGeom.setCoordinates(coordinates);
this.geometryFunction_(this.sketchCoords_, geometry);
}
if (coordinates.length === 0) {
this.finishCoordinate_ = null;
}
this.updateSketchFeatures_();
};
/**
* Stop drawing and add the sketch feature to the target layer.
* The {@link ol.interaction.DrawEventType.DRAWEND} event is dispatched before
* inserting the feature.
* @api
*/
ol.interaction.Draw.prototype.finishDrawing = function() {
var sketchFeature = this.abortDrawing_();
goog.asserts.assert(sketchFeature, 'sketchFeature expected to be truthy');
var coordinates = this.sketchCoords_;
var geometry = sketchFeature.getGeometry();
goog.asserts.assertInstanceof(geometry, ol.geom.SimpleGeometry,
'geometry must be an ol.geom.SimpleGeometry');
if (this.mode_ === ol.interaction.DrawMode.LINE_STRING) {
// remove the redundant last point
coordinates.pop();
this.geometryFunction_(coordinates, geometry);
} else if (this.mode_ === ol.interaction.DrawMode.POLYGON) {
// When we finish drawing a polygon on the last point,
// the last coordinate is duplicated as for LineString
// we force the replacement by the first point
coordinates[0].pop();
coordinates[0].push(coordinates[0][0]);
this.geometryFunction_(coordinates, geometry);
}
// cast multi-part geometries
if (this.type_ === ol.geom.GeometryType.MULTI_POINT) {
sketchFeature.setGeometry(new ol.geom.MultiPoint([coordinates]));
} else if (this.type_ === ol.geom.GeometryType.MULTI_LINE_STRING) {
sketchFeature.setGeometry(new ol.geom.MultiLineString([coordinates]));
} else if (this.type_ === ol.geom.GeometryType.MULTI_POLYGON) {
sketchFeature.setGeometry(new ol.geom.MultiPolygon([coordinates]));
}
// First dispatch event to allow full set up of feature
this.dispatchEvent(new ol.interaction.DrawEvent(
ol.interaction.DrawEventType.DRAWEND, sketchFeature));
// Then insert feature
Iif (this.features_) {
this.features_.push(sketchFeature);
}
Eif (this.source_) {
this.source_.addFeature(sketchFeature);
}
};
/**
* Stop drawing without adding the sketch feature to the target layer.
* @return {ol.Feature} The sketch feature (or null if none).
* @private
*/
ol.interaction.Draw.prototype.abortDrawing_ = function() {
this.finishCoordinate_ = null;
var sketchFeature = this.sketchFeature_;
if (sketchFeature) {
this.sketchFeature_ = null;
this.sketchPoint_ = null;
this.sketchLine_ = null;
this.overlay_.getSource().clear(true);
}
return sketchFeature;
};
/**
* Extend an existing geometry by adding additional points. This only works
* on features with `LineString` geometries, where the interaction will
* extend lines by adding points to the end of the coordinates array.
* @param {!ol.Feature} feature Feature to be extended.
* @api
*/
ol.interaction.Draw.prototype.extend = function(feature) {
var geometry = feature.getGeometry();
goog.asserts.assert(this.mode_ == ol.interaction.DrawMode.LINE_STRING,
'interaction mode must be "line"');
goog.asserts.assert(geometry, 'feature must have a geometry');
goog.asserts.assert(geometry.getType() == ol.geom.GeometryType.LINE_STRING,
'feature geometry must be a line string');
var lineString = /** @type {ol.geom.LineString} */ (geometry);
this.sketchFeature_ = feature;
this.sketchCoords_ = lineString.getCoordinates();
var last = this.sketchCoords_[this.sketchCoords_.length - 1];
this.finishCoordinate_ = last.slice();
this.sketchCoords_.push(last.slice());
this.updateSketchFeatures_();
this.dispatchEvent(new ol.interaction.DrawEvent(
ol.interaction.DrawEventType.DRAWSTART, this.sketchFeature_));
};
/**
* @inheritDoc
*/
ol.interaction.Draw.prototype.shouldStopEvent = goog.functions.FALSE;
/**
* Redraw the sketch features.
* @private
*/
ol.interaction.Draw.prototype.updateSketchFeatures_ = function() {
var sketchFeatures = [];
if (this.sketchFeature_) {
sketchFeatures.push(this.sketchFeature_);
}
if (this.sketchLine_) {
sketchFeatures.push(this.sketchLine_);
}
if (this.sketchPoint_) {
sketchFeatures.push(this.sketchPoint_);
}
var overlaySource = this.overlay_.getSource();
overlaySource.clear(true);
overlaySource.addFeatures(sketchFeatures);
};
/**
* @private
*/
ol.interaction.Draw.prototype.updateState_ = function() {
var map = this.getMap();
var active = this.getActive();
if (!map || !active) {
this.abortDrawing_();
}
this.overlay_.setMap(active ? map : null);
};
/**
* Create a `geometryFunction` for `mode: 'Circle'` that will create a regular
* polygon with a user specified number of sides and start angle instead of an
* `ol.geom.Circle` geometry.
* @param {number=} opt_sides Number of sides of the regular polygon. Default is
* 32.
* @param {number=} opt_angle Angle of the first point in radians. 0 means East.
* Default is the angle defined by the heading from the center of the
* regular polygon to the current pointer position.
* @return {ol.interaction.DrawGeometryFunctionType} Function that draws a
* polygon.
* @api
*/
ol.interaction.Draw.createRegularPolygon = function(opt_sides, opt_angle) {
return (
/**
* @param {ol.Coordinate|Array.<ol.Coordinate>|Array.<Array.<ol.Coordinate>>} coordinates
* @param {ol.geom.SimpleGeometry=} opt_geometry
* @return {ol.geom.SimpleGeometry}
*/
function(coordinates, opt_geometry) {
var center = coordinates[0];
var end = coordinates[1];
var radius = Math.sqrt(
ol.coordinate.squaredDistance(center, end));
var geometry = opt_geometry ? opt_geometry :
ol.geom.Polygon.fromCircle(new ol.geom.Circle(center), opt_sides);
goog.asserts.assertInstanceof(geometry, ol.geom.Polygon,
'geometry must be a polygon');
var angle = opt_angle ? opt_angle :
Math.atan((end[1] - center[1]) / (end[0] - center[0]));
ol.geom.Polygon.makeRegular(geometry, center, radius, angle);
return geometry;
}
);
};
/**
* Get the drawing mode. The mode for mult-part geometries is the same as for
* their single-part cousins.
* @param {ol.geom.GeometryType} type Geometry type.
* @return {ol.interaction.DrawMode} Drawing mode.
* @private
*/
ol.interaction.Draw.getMode_ = function(type) {
var mode;
if (type === ol.geom.GeometryType.POINT ||
type === ol.geom.GeometryType.MULTI_POINT) {
mode = ol.interaction.DrawMode.POINT;
} else if (type === ol.geom.GeometryType.LINE_STRING ||
type === ol.geom.GeometryType.MULTI_LINE_STRING) {
mode = ol.interaction.DrawMode.LINE_STRING;
} else if (type === ol.geom.GeometryType.POLYGON ||
type === ol.geom.GeometryType.MULTI_POLYGON) {
mode = ol.interaction.DrawMode.POLYGON;
} else Eif (type === ol.geom.GeometryType.CIRCLE) {
mode = ol.interaction.DrawMode.CIRCLE;
}
goog.asserts.assert(mode !== undefined, 'mode should be defined');
return mode;
};
/**
* Function that takes coordinates and an optional existing geometry as
* arguments, and returns a geometry. The optional existing geometry is the
* geometry that is returned when the function is called without a second
* argument.
* @typedef {function(!(ol.Coordinate|Array.<ol.Coordinate>|
* Array.<Array.<ol.Coordinate>>), ol.geom.SimpleGeometry=):
* ol.geom.SimpleGeometry}
* @api
*/
ol.interaction.DrawGeometryFunctionType;
/**
* Draw mode. This collapses multi-part geometry types with their single-part
* cousins.
* @enum {string}
*/
ol.interaction.DrawMode = {
POINT: 'Point',
LINE_STRING: 'LineString',
POLYGON: 'Polygon',
CIRCLE: 'Circle'
};
|