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comparison src/djol/DynamicStyle.js @ 34:27e8e9e38e07 default tip

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Слияние
author nickolay
date Wed, 05 Jun 2019 20:44:15 +0300
parents 8af8e840dd49 1dc2fd263b90
children
comparison
equal deleted inserted replaced
33:8af8e840dd49 34:27e8e9e38e07
1 define([ "./declare-style", "dojo/_base/declare", "ol", "implab/safe" ],
2
3 function(declare, dojoDeclare, ol, safe) {
4 return declare([], {
5 _cache : null,
6 _getKey : null,
7 _getZoom : null,
8
9 defaultStyle : null,
10
11 style : null,
12
13 styleFunction : null,
14
15 filter : null,
16
17 constructor : function(opts) {
18 if (opts)
19 dojoDeclare.safeMixin(this, opts);
20
21 this._cache = {};
22
23 if (this.zoom) {
24 if (this.zoom instanceof Function) {
25 this._getZoom = this.zoom;
26 } else {
27 var levels = [], max = "max";
28 for ( var p in this.zoom) {
29 if (safe.isNumber(this.zoom[p]))
30 levels.push({
31 name : p,
32 zoom : Number(this.zoom[p])
33 });
34 else if (this.zoom[p] == "max")
35 max = p;
36 }
37
38 levels.sort(function(x, y) {
39 return x.zoom - y.zoom;
40 });
41
42 this.zoomMax = max;
43 this.zoomLevels = levels;
44
45 this._getZoom = function(z) {
46 for (var i = 0; i < levels.length; i++) {
47 if (z <= levels[i].zoom)
48 return levels[i].name;
49 }
50 return max;
51 };
52 }
53 } else {
54 this._getZoom = function(z) {
55 return "max";
56 };
57 }
58
59 if (this.key) {
60 if (this.key instanceof Function) {
61 this._getKey = this.key;
62 } else if (typeof this.key === "string") {
63 this._getKey = function(ft) {
64 return ft.get(this.key);
65 };
66 } else {
67 this._getKey = function(ft, z) {
68 var k = this.key[z];
69 if (k instanceof Function)
70 return k.call(this, ft, z);
71 else if (typeof k == "string")
72 return ft.get(k);
73 else
74 return this.defaultStyle;
75 };
76 }
77 } else {
78 this._getKey = function() {
79 return this.defaultStyle;
80 };
81 }
82
83 if (this.style) {
84 if (this.style instanceof Function) {
85 this._style = this.style;
86 } else {
87 this._style = function(ft, res, key, zoom) {
88 var s = this.style[zoom];
89 return s && (s instanceof Function) ? s.apply(
90 this,
91 arguments) : s;
92 };
93 }
94 }
95 },
96
97 getFeatureStyle : function(ft, res) {
98 safe.argumentNotNull(ft, "ft");
99
100 if (this.filter && this.filter(ft) === false)
101 return null;
102
103 var z = this._getZoom(res);
104 var k = this._getKey(ft, z);
105
106 var cid = [ k, z ].join('-');
107
108 var style = this._cache[cid];
109 if (!style) {
110 style = this._style ? this._style(ft, res, k, z) : null;
111 this._cache[cid] = style;
112 }
113
114
115 return safe.isNull(style) || style instanceof Array ? style : [ style ];
116 }
117
118 });
119 });