extlib/leaflet/src/layer/tile/TileLayer.Canvas.js

   1 L.TileLayer.Canvas = L.TileLayer.extend({
   2         options: {
   3                 async: false
   4         },
   5
   6         initialize: function(options) {
   7                 L.Util.setOptions(this, options);
   8         },
   9
  10         _createTileProto: function() {
  11                 this._canvasProto = L.DomUtil.create('canvas', 'leaflet-tile');
  12
  13                 var tileSize = this.options.tileSize;
  14                 this._canvasProto.width = tileSize;
  15                 this._canvasProto.height = tileSize;
  16         },
  17
  18         _createTile: function() {
  19                 var tile = this._canvasProto.cloneNode(false);
  20                 tile.onselectstart = tile.onmousemove = L.Util.falseFn;
  21                 return tile;
  22         },
  23
  24         _loadTile: function(tile, tilePoint, zoom) {
  25                 tile._layer = this;
  26
  27                 this.drawTile(tile, tilePoint, zoom);
  28
  29                 if (!this.options.async) {
  30                         this.tileDrawn(tile);
  31                 }
  32         },
  33
  34         drawTile: function(tile, tilePoint, zoom) {
  35                 // override with rendering code
  36         },
  37
  38         tileDrawn: function(tile) {
  39                 this._tileOnLoad.call(tile);
  40         }
  41 });