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
|
<html>
<head>
<script src="../OLLoader.js"></script>
<script type="text/javascript">
function test_initialize(t) {
t.plan(5);
// construct with a single layer
var layer = new OpenLayers.Layer.Vector();
var control = new OpenLayers.Control.Snapping({
layer: layer
});
t.ok(control.layer === layer, "[a] source layer properly set");
t.eq(control.targets.length, 1, "[a] one target layer");
t.ok(control.targets[0].layer === layer, "[a] target set");
control.destroy();
// construct with a different target, default target config
var layer2 = new OpenLayers.Layer.Vector();
control = new OpenLayers.Control.Snapping({
layer: layer,
targets: [layer2]
});
t.eq(control.targets.length, 1, "[b] one target layer");
t.ok(control.targets[0].layer == layer2, "[b] target set");
control.destroy();
}
function test_setLayer(t) {
t.plan(4);
var layer = new OpenLayers.Layer.Vector();
var control = new OpenLayers.Control.Snapping();
control.setLayer(layer);
t.ok(control.layer === layer, "layer properly set");
// confirm that the control is deactivated and reactivated when setting new layer
var log = {
activated: 0,
deactivated: 0
};
control.activate = function() {
log.activated++;
}
control.deactivate = function() {
log.deactivated++;
}
control.active = true;
var layer2 = new OpenLayers.Layer.Vector();
control.setLayer(layer2);
t.eq(log.deactivated, 1, "control deactivated");
t.ok(control.layer === layer2, "layer properly reset");
t.eq(log.activated, 1, "control reactivated");
control.destroy();
}
function test_setTargets(t) {
t.plan(4);
var layer1 = new OpenLayers.Layer.Vector();
var layer2 = new OpenLayers.Layer.Vector();
var control = new OpenLayers.Control.Snapping();
var log = {
addTarget: [],
addTargetLayer: []
};
control.addTarget = function(target) {
log.addTarget.push(target);
};
control.addTargetLayer = function(target) {
log.addTargetLayer.push(target);
};
control.setTargets([layer1, {layer: layer2}]);
t.eq(log.addTargetLayer.length, 1, "setTargetLayer called once");
t.ok(log.addTargetLayer[0] === layer1, "setTargetLayer called with layer1");
t.eq(log.addTarget.length, 1, "setTarget called once");
t.ok(log.addTarget[0].layer === layer2, "setTarget called with layer2");
control.destroy();
}
function test_addTarget(t) {
t.plan(5);
var layer = new OpenLayers.Layer.Vector();
var control = new OpenLayers.Control.Snapping({
defaults: {
nodeTolerance: 30,
tolerance: 40
}
});
var log = {};
control.addTarget({layer: layer});
t.eq(control.targets.length, 1, "single target");
var target = control.targets[0];
t.ok(target.layer === layer, "correct target layer");
t.eq(target.nodeTolerance, 30, "correct nodeTolerance");
t.eq(target.edgeTolerance, 40, "correct edgeTolerance");
t.eq(target.vertexTolerance, 40, "correct vertexTolerance");
control.destroy();
}
function test_removeTargetLayer(t) {
t.plan(3);
var layer1 = new OpenLayers.Layer.Vector();
var layer2 = new OpenLayers.Layer.Vector();
var layer3 = new OpenLayers.Layer.Vector();
var control = new OpenLayers.Control.Snapping({
targets: [layer1, layer2, layer3]
});
control.removeTargetLayer(layer2);
t.eq(control.targets.length, 2, "correct targets length");
t.ok(control.targets[0].layer === layer1, "layer1 remains");
t.ok(control.targets[1].layer === layer3, "layer3 remains");
control.destroy();
}
function test_activate(t) {
t.plan(4);
var layer = new OpenLayers.Layer.Vector();
var control = new OpenLayers.Control.Snapping({
layer: layer
});
control.activate();
t.eq(layer.events.listeners.sketchmodified.length, 1, "one sketchmodified listener");
t.ok(layer.events.listeners.sketchmodified[0].func === control.onSketchModified, "correct sketchmodified listener");
t.eq(layer.events.listeners.vertexmodified.length, 1, "one vertexmodified listener");
t.ok(layer.events.listeners.vertexmodified[0].func === control.onVertexModified, "correct vertexmodified listener");
control.destroy();
}
function test_deactivate(t) {
t.plan(2);
var layer = new OpenLayers.Layer.Vector();
var control = new OpenLayers.Control.Snapping({
layer: layer
});
control.activate();
control.deactivate();
t.eq(layer.events.listeners.sketchmodified.length, 0, "no sketchmodified listeners");
t.eq(layer.events.listeners.vertexmodified.length, 0, "no vertexmodified listeners");
control.destroy();
}
function test_resolution_limits(t) {
t.plan(7);
var map = new OpenLayers.Map("map", {
resolutions: [1],
maxExtent: new OpenLayers.Bounds(0, 0, 100, 100)
});
var layer = new OpenLayers.Layer.Vector(null, {
isBaseLayer: true
});
layer.addFeatures([
new OpenLayers.Feature.Vector(OpenLayers.Geometry.fromWKT(
"POINT(50 50)"
))
]);
map.addLayer(layer);
map.zoomToMaxExtent();
var control = new OpenLayers.Control.Snapping({layer: layer});
var result;
var loc = new OpenLayers.Geometry.Point(49, 49);
// 1) test a target with no constraints
control.setTargets([{layer: layer}]);
result = control.testTarget(control.targets[0], loc);
t.ok(result !== null, "1) target is eligible");
// 2) test a target with minResolution < map.resolution
control.setTargets([{layer: layer, minResolution: 0.5}]);
result = control.testTarget(control.targets[0], loc);
t.ok(result !== null, "2) target is eligible");
// 3) test a target with minResolution === map.resolution
control.setTargets([{layer: layer, minResolution: 1}]);
result = control.testTarget(control.targets[0], loc);
t.ok(result !== null, "3) target is eligible");
// 4) test a target with minResolution > map.resolution
control.setTargets([{layer: layer, minResolution: 1.5}]);
result = control.testTarget(control.targets[0], loc);
t.ok(result === null, "4) target is not eligible");
// 5) test a target with maxResolution < map.resolution
control.setTargets([{layer: layer, maxResolution: 0.5}]);
result = control.testTarget(control.targets[0], loc);
t.ok(result === null, "5) target is not eligible");
// 6) test a target with maxResolution === map.resolution
control.setTargets([{layer: layer, maxResolution: 1}]);
result = control.testTarget(control.targets[0], loc);
t.ok(result === null, "6) target is not eligible");
// 7) test a target with maxResolution > map.resolution
control.setTargets([{layer: layer, maxResolution: 1.5}]);
result = control.testTarget(control.targets[0], loc);
t.ok(result !== null, "7) target is eligible");
map.destroy();
}
function test_filter(t) {
t.plan(3);
var map = new OpenLayers.Map("map", {
resolutions: [1],
maxExtent: new OpenLayers.Bounds(0, 0, 100, 100)
});
var layer1 = new OpenLayers.Layer.Vector(null, {
isBaseLayer: true
});
var f1 = new OpenLayers.Feature.Vector(OpenLayers.Geometry.fromWKT(
"LINESTRING(0 0, 10 10, 20 20, 30 30)"
), {foo: 'bar'});
f1.fid = "FID1";
var f2 = new OpenLayers.Feature.Vector(OpenLayers.Geometry.fromWKT(
"LINESTRING(11 10, 20 10, 30 10)"
), {foo: 'bar'});
f2.fid = "FID2";
layer1.addFeatures([f1, f2]);
map.addLayers([layer1]);
map.zoomToMaxExtent();
var control = new OpenLayers.Control.Snapping({
layer: layer1,
targets: [layer1],
defaults: {tolerance: 4}
});
control.activate();
var result;
var loc = new OpenLayers.Geometry.Point(1, 1);
control.setTargets([{layer: layer1}]);
result = control.testTarget(control.targets[0], loc);
t.ok(result !== null, "target is eligible without a filter set");
var filter = new OpenLayers.Filter.Logical({
type: OpenLayers.Filter.Logical.NOT,
filters: [
new OpenLayers.Filter.FeatureId({fids: ["FID1", "FID2"]})
]
});
control.setTargets([{layer: layer1, filter: filter}]);
result = control.testTarget(control.targets[0], loc);
t.ok(result === null, "target is not eligible with a filter set which excludes the target's features");
filter = new OpenLayers.Filter.Comparison({type: OpenLayers.Filter.Comparison.NOT_EQUAL_TO, value: 'bar', property: 'foo'});
control.setTargets([{layer: layer1, filter: filter}]);
result = control.testTarget(control.targets[0], loc);
t.ok(result === null, "target is not eligible with a filter set which excludes the target's features using a comparison filter");
}
function test_snapping(t) {
t.plan(46);
var map = new OpenLayers.Map("map", {
resolutions: [1],
maxExtent: new OpenLayers.Bounds(0, 0, 100, 100)
});
var layer1 = new OpenLayers.Layer.Vector(null, {
isBaseLayer: true
});
layer1.addFeatures([
new OpenLayers.Feature.Vector(OpenLayers.Geometry.fromWKT(
"LINESTRING(0 0, 10 10, 20 20, 30 30)"
)),
new OpenLayers.Feature.Vector(OpenLayers.Geometry.fromWKT(
"LINESTRING(11 10, 20 10, 30 10)"
))
]);
var layer2 = new OpenLayers.Layer.Vector();
layer2.addFeatures([
new OpenLayers.Feature.Vector(OpenLayers.Geometry.fromWKT(
"LINESTRING(10 10, 20 20, 30 30)"
)),
new OpenLayers.Feature.Vector(OpenLayers.Geometry.fromWKT(
"LINESTRING(21 10, 20 20, 20 30)"
))
]);
map.addLayers([layer1, layer2]);
map.zoomToMaxExtent();
var control = new OpenLayers.Control.Snapping({
layer: layer1,
targets: [layer1, layer2],
defaults: {tolerance: 4}
});
control.activate();
map.addControl(control);
// log beforesnap, snap, and unsnap events
var events = [];
function listener(event) {
events.push(event);
}
control.events.on({
beforesnap: listener,
snap: listener,
unsnap: listener
});
// create a vertex and a convenience method for mocking the drag
var vertex = new OpenLayers.Geometry.Point(-100, -100);
function drag(x, y) {
var px = map.getPixelFromLonLat(new OpenLayers.LonLat(x, y));
layer1.events.triggerEvent("vertexmodified", {
vertex: vertex, pixel: px
});
}
// mock up drag far from features
drag(-100, -100);
t.eq(events.length, 0, "no snapping");
// mock up drag near first node of first feature
drag(0, 1);
t.eq(events.length, 2, "[a] 2 events triggered");
t.eq(events[0].type, "beforesnap", "[a] beforesnap triggered");
t.eq(events[0].snapType, "node", "[a] beforesnap triggered for node");
t.ok(events[0].point === vertex, "[a] beforesnap triggered with vertex");
t.eq(events[0].x, 0, "[a] beforesnap triggered correct x");
t.eq(events[0].y, 0, "[a] beforesnap triggered with correct y");
t.eq(events[1].type, "snap", "[a] snap triggered");
t.eq(events[1].snapType, "node", "[a] snap triggered for node");
t.ok(events[1].point === vertex, "[a] snap triggered with point");
t.eq(events[1].distance, 1, "[a] snap triggered correct distance");
t.ok(events[1].layer === layer1, "[a] snap triggered with correct target layer");
t.eq(vertex.x, 0, "[a] vertex x modified");
t.eq(vertex.y, 0, "[a] vertex y modified");
events = [];
// mock up drag that unsnaps
drag(-100, -50);
t.eq(events.length, 1, "[b] 1 event triggered");
t.eq(events[0].type, "unsnap", "[b] unsnap triggered");
t.ok(events[0].point === vertex, "[b] unsnap triggered with vertex");
t.eq(vertex.x, -100, "[b] vertex x unsnapped");
t.eq(vertex.y, -50, "[b] vertex y unsnapped");
events = [];
// drag near node of second feature in first layer to demonstrate precedence of node snapping
drag(9, 10);
t.eq(events.length, 2, "[c] 2 events triggered");
t.eq(events[0].type, "beforesnap", "[c] beforesnap triggered first");
t.eq(events[1].type, "snap", "[c] snap triggered second");
t.eq(events[1].snapType, "node", "[c] snap to node");
// unsnap & reset
drag(-100, -50);
events = [];
// drag near node of second feature in second layer to demonstrate greedy property
// with greedy true (default) the best target from the first layer with eligible targets is used
drag(22, 10);
t.eq(events.length, 2, "[d] 2 events triggered");
t.eq(events[1].type, "snap", "[d] snap triggered second");
t.eq(events[1].snapType, "vertex", "[d] snap to vertex");
t.ok(events[1].layer === layer1, "[d] snap to vertex in first layer");
t.eq(vertex.x, 20, "[d] vertex x modified");
t.eq(vertex.y, 10, "[d] vertex y modified");
// unsnap & reset
drag(-100, -50);
events = [];
// do the same drag but with greedy false - this will look for best target in all layers
control.greedy = false;
drag(22, 10);
t.eq(events.length, 2, "[d] 2 events triggered");
t.eq(events[1].type, "snap", "[d] snap triggered second");
t.eq(events[1].snapType, "node", "[d] snap to node");
t.ok(events[1].layer === layer2, "[d] snap to node in second layer");
// unsnap & reset
drag(-100, -50);
control.greedy = true;
events = [];
// demonstrate snapping on sketchstarted
var p = new OpenLayers.Geometry.Point(0, 1);
layer1.events.triggerEvent("sketchstarted", {
vertex: p,
feature: new OpenLayers.Feature.Vector(p)
});
t.eq(events.length, 2, "[sketchstarted] 2 events triggered");
t.eq(events[0].type, "beforesnap", "[sketchstarted] beforesnap triggered");
t.eq(events[0].snapType, "node", "[sketchstarted] beforesnap triggered for node");
t.ok(events[0].point === p, "[sketchstarted] beforesnap triggered with vertex");
t.eq(events[0].x, 0, "[sketchstarted] beforesnap triggered correct x");
t.eq(events[0].y, 0, "[sketchstarted] beforesnap triggered with correct y");
t.eq(events[1].type, "snap", "[sketchstarted] snap triggered");
t.eq(events[1].snapType, "node", "[sketchstarted] snap triggered for node");
t.ok(events[1].point === p, "[sketchstarted] snap triggered with point");
t.eq(events[1].distance, 1, "[sketchstarted] snap triggered correct distance");
t.ok(events[1].layer === layer1, "[sketchstarted] snap triggered with correct target layer");
t.eq(p.x, 0, "[sketchstarted] vertex x modified");
t.eq(p.y, 0, "[sketchstarted] vertex y modified");
// reset
events = [];
map.destroy();
}
</script>
</head>
<body>
<div id="map" style="width: 100px; height: 100px;"></div>
</body>
</html>
|
