45 lines
1.1 KiB
JavaScript
45 lines
1.1 KiB
JavaScript
'use strict';
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var RealtimeTileLayer = L.TileLayer.extend({
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initialize: function(wsChannel, layerId, map) {
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var self = this;
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this.layerId = layerId;
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wsChannel.addListener("rendered-tile", function(tc){
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if (tc.layerid != self.layerId){
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//ignore other layers
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return;
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}
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if (tc.zoom != map.getZoom()){
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//ignore other zoom levels
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return;
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}
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var id = self.getImageId(tc.x, tc.y, tc.zoom);
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var el = document.getElementById(id);
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if (el){
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//Update src attribute if img found
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el.src = self.getTileSource(tc.x, tc.y, tc.zoom, true);
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}
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});
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},
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getTileSource: function(x,y,zoom,cacheBust){
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return "api/tile/" + this.layerId + "/" + x + "/" + y + "/" + zoom + (cacheBust ? "?_=" + Date.now() : "");
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},
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getImageId: function(x, y, zoom){
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return "tile-" + this.layerId + "/" + x + "/" + y + "/" + zoom;
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},
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createTile: function(coords){
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var tile = document.createElement('img');
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tile.src = this.getTileSource(coords.x, coords.y, coords.z, true);
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tile.id = this.getImageId(coords.x, coords.y, coords.z);
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return tile;
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}
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});
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