59 lines
1.5 KiB
JavaScript
59 lines
1.5 KiB
JavaScript
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L.FollowControl = L.Control.extend({
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options: {
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getPosition: function() { return L.latLng(53.5,10); },
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element: 'div',
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cssClass: '',
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innerHTML: '',
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initialFollow: true,
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followUpdateInterval: 100,
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noFollowUpdateInterval: 1000,
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},
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initialize: function(options) {
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L.Control.prototype.initialize.call(this,options);
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L.Util.setOptions(this,options);
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},
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onAdd: function(map) {
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this._map = map;
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this._div = L.DomUtil.create(this.options.element, this.options.cssClass );
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this._div.innerHTML = this.options.innerHTML;
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this._doFollow = this.options.initialFollow;
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var that = this;
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this._div.onclick = function() {
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that.setFollow(true);
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return true;
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};
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this.update();
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return this._div;
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},
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onRemove: function(map) {
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this._map = null;
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},
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setFollow: function( v ) {
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this._doFollow = v;
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},
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update: function() {
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if( this._map && this._doFollow ) {
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this._map.setView( this.options.getPosition() );
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var that = this;
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setTimeout( function() { that.update(); }, this.options.noFollowUpdateInterval );
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} else {
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var that = this;
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setTimeout( function() { that.update(); }, this.options.followUpdateInterval );
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}
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},
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_map: null,
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_doFollow: true,
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});
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L.followControl = function( options ) {
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return new L.FollowControl( options );
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}
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