194 lines
7.9 KiB
JavaScript
194 lines
7.9 KiB
JavaScript
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L.Control.SliderControl = L.Control.extend({
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options: {
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position: 'topright',
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layers: null,
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timeAttribute: 'time',
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isEpoch: false, // whether the time attribute is seconds elapsed from epoch
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startTimeIdx: 0, // where to start looking for a timestring
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timeStrLength: 19, // the size of yyyy-mm-dd hh:mm:ss - if millis are present this will be larger
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maxValue: -1,
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minValue: 0,
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showAllOnStart: false,
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markers: null,
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range: false,
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follow: false,
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sameDate: false,
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alwaysShowDate : false,
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rezoom: null
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},
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initialize: function (options) {
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L.Util.setOptions(this, options);
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this._layer = this.options.layer;
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},
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extractTimestamp: function(time, options) {
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if (options.isEpoch) {
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time = (new Date(parseInt(time))).toString(); // this is local time
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}
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return time.substr(options.startTimeIdx, options.startTimeIdx + options.timeStrLength);
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},
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setPosition: function (position) {
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var map = this._map;
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if (map) {
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map.removeControl(this);
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}
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this.options.position = position;
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if (map) {
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map.addControl(this);
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}
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this.startSlider();
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return this;
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},
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onAdd: function (map) {
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this.options.map = map;
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// Create a control sliderContainer with a jquery ui slider
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var sliderContainer = L.DomUtil.create('div', 'slider', this._container);
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$(sliderContainer).append('<div id="leaflet-slider" style="width:200px"><div class="ui-slider-handle"></div><div id="slider-timestamp" style="width:200px; margin-top:13px; background-color:#FFFFFF; text-align:center; border-radius:5px;"></div></div>');
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//Prevent map panning/zooming while using the slider
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$(sliderContainer).mousedown(function () {
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map.dragging.disable();
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});
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$(document).mouseup(function () {
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map.dragging.enable();
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//Hide the slider timestamp if not range and option alwaysShowDate is set on false
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if (options.range || !options.alwaysShowDate) {
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$('#slider-timestamp').html('');
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}
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});
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var options = this.options;
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this.options.markers = [];
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//If a layer has been provided: calculate the min and max values for the slider
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if (this._layer) {
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var index_temp = 0;
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this._layer.eachLayer(function (layer) {
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options.markers[index_temp] = layer;
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++index_temp;
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});
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options.maxValue = index_temp - 1;
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this.options = options;
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} else {
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console.log("Error: You have to specify a layer via new SliderControl({layer: your_layer});");
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}
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return sliderContainer;
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},
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onRemove: function (map) {
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//Delete all markers which where added via the slider and remove the slider div
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for (i = this.options.minValue; i <= this.options.maxValue; i++) {
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map.removeLayer(this.options.markers[i]);
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}
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$('#leaflet-slider').remove();
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// unbind listeners to prevent memory leaks
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$(document).off("mouseup");
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$(".slider").off("mousedown");
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},
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startSlider: function () {
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_options = this.options;
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_extractTimestamp = this.extractTimestamp
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var index_start = _options.minValue;
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if(_options.showAllOnStart){
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index_start = _options.maxValue;
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if(_options.range) _options.values = [_options.minValue,_options.maxValue];
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else _options.value = _options.maxValue;
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}
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$("#leaflet-slider").slider({
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range: _options.range,
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value: _options.value,
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values: _options.values,
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min: _options.minValue,
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max: _options.maxValue,
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sameDate: _options.sameDate,
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step: 1,
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slide: function (e, ui) {
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var map = _options.map;
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var fg = L.featureGroup();
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if(!!_options.markers[ui.value]) {
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// If there is no time property, this line has to be removed (or exchanged with a different property)
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if(_options.markers[ui.value].feature !== undefined) {
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if(_options.markers[ui.value].feature.properties[_options.timeAttribute]){
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if(_options.markers[ui.value]) $('#slider-timestamp').html(
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_extractTimestamp(_options.markers[ui.value].feature.properties[_options.timeAttribute], _options));
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}else {
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console.error("Time property "+ _options.timeAttribute +" not found in data");
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}
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}else {
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// set by leaflet Vector Layers
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if(_options.markers [ui.value].options[_options.timeAttribute]){
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if(_options.markers[ui.value]) $('#slider-timestamp').html(
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_extractTimestamp(_options.markers[ui.value].options[_options.timeAttribute], _options));
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}else {
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console.error("Time property "+ _options.timeAttribute +" not found in data");
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}
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}
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var i;
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// clear markers
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for (i = _options.minValue; i <= _options.maxValue; i++) {
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if(_options.markers[i]) map.removeLayer(_options.markers[i]);
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}
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if(_options.range){
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// jquery ui using range
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for (i = ui.values[0]; i <= ui.values[1]; i++){
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if(_options.markers[i]) {
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map.addLayer(_options.markers[i]);
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fg.addLayer(_options.markers[i]);
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}
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}
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}else if(_options.follow){
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for (i = ui.value - _options.follow + 1; i <= ui.value ; i++) {
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if(_options.markers[i]) {
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map.addLayer(_options.markers[i]);
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fg.addLayer(_options.markers[i]);
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}
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}
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}else if(_options.sameDate){
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var currentTime;
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if (_options.markers[ui.value].feature !== undefined) {
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currentTime = _options.markers[ui.value].feature.properties.time;
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} else {
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currentTime = _options.markers[ui.value].options.time;
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}
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for (i = _options.minValue; i <= _options.maxValue; i++) {
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if(_options.markers[i].options.time == currentTime) map.addLayer(_options.markers[i]);
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}
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}else{
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for (i = _options.minValue; i <= ui.value ; i++) {
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if(_options.markers[i]) {
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map.addLayer(_options.markers[i]);
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fg.addLayer(_options.markers[i]);
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}
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}
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}
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};
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if(_options.rezoom) {
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map.fitBounds(fg.getBounds(), {
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maxZoom: _options.rezoom
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});
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}
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}
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});
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if (!_options.range && _options.alwaysShowDate) {
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$('#slider-timestamp').html(_extractTimeStamp(_options.markers[index_start].feature.properties[_options.timeAttribute], _options));
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}
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for (i = _options.minValue; i <= index_start; i++) {
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_options.map.addLayer(_options.markers[i]);
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}
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}
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});
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L.control.sliderControl = function (options) {
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return new L.Control.SliderControl(options);
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};
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