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8
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1 define([
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2 "dojo/_base/declare",
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3 "implab/safe",
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4 "./MeasureToolBase",
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5 "implab/text/format",
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6 "dojo/i18n!./format/nls/units",
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7 "ol" ],
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8
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9 function(declare, safe, MeasureToolBase, format, units, ol) {
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10 return declare([ MeasureToolBase ], {
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11
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12 isGeodesic : true,
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13
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14 units : 'metric',
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15
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16 constructor : function(opts) {
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17 if (opts)
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18 safe.mixin(this,opts,["isGeodesic", "units"]);
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19 },
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20
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21 _createDraw : function(source) {
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22 return new ol.interaction.Draw({
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23 source : source,
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24 type : "Polygon",
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25 style : this.drawStyle
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26 });
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27 },
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28
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29 _formatTooltip : function(sketch, proj) {
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30 var area;
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31 if (this.isGeodesic) {
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32 var geom = sketch.getGeometry().clone().transform(proj, 'EPSG:4326');
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33 var coordinates = geom.getLinearRing(0).getCoordinates();
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34 area = Math.abs(this.wgs84Sphere.geodesicArea(coordinates));
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35 } else {
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36 area = sketch.getGeometry().getArea();
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37 }
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38
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39 var mpu, unitName;
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40 switch (this.units) {
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41 case "nautical":
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42 mpu = 1852*1852;
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43 unitName = units.nmiles2;
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44 break;
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45 default:
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46 mpu = 1852*1852;
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47 unitName = units.kilometers2;
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48 }
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49
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50 if (area > mpu/10) {
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51 return format(
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52 "{0:#0.##} {1}",
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53 area / mpu,
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54 unitName);
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55 } else {
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56 return format("{0:#0.##} {1}", area, units.meters2);
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57 }
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58 }
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59
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60 });
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61 }); |
