| 1 | var panes = { |
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| 2 | mapL: {}, |
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| 3 | mapLL: {}, |
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| 4 | mapR: {} |
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| 5 | }; |
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| 6 | |
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| 7 | ProjPane = Class.create(); |
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| 8 | ProjPane.prototype = { |
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| 9 | id: null, |
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| 10 | map: null, |
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| 11 | proj: null, |
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| 12 | |
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| 13 | initialize: function(pane, code) { |
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| 14 | this.id = pane; |
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| 15 | if (code) this.setProj(code); |
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| 16 | }, |
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| 17 | |
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| 18 | updateCoords: function(coords) { |
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| 19 | document.getElementById(this.id+'_coords').innerHTML = coords.toString(); |
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| 20 | var pt = this.map.getLayerPxFromLonLat(coords); |
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| 21 | this.marker.moveTo(pt); |
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| 22 | }, |
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| 23 | |
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| 24 | setProj: function(code) { |
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| 25 | document.getElementById(this.id+'_proj').value = code; |
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| 26 | |
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| 27 | this.proj = new Proj4js.Proj(code); |
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| 28 | var mapDef = Proj4js.maps[this.proj.srsCode]; |
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| 29 | |
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| 30 | if (this.map) this.map.destroy(); |
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| 31 | this.map = new OpenLayers.Map(this.id, mapDef.mapOptions); |
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| 32 | this.mapLayer = new OpenLayers.Layer.WMS(mapDef.layerName, mapDef.layerUrl, mapDef.layerParams, mapDef.layerOptions); |
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| 33 | this.map.addLayer(this.mapLayer); |
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| 34 | |
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| 35 | this.map.addLayer(new OpenLayers.Layer.Markers('')); |
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| 36 | this.marker = new OpenLayers.Marker(new OpenLayers.LonLat(0,0)); |
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| 37 | this.map.layers[1].addMarker(this.marker); |
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| 38 | this.marker.map = this.map; |
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| 39 | if (window.bounds) { |
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| 40 | this.map.addLayer(new OpenLayers.Layer.Boxes()); |
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| 41 | this.map.layers[2].addMarker(new OpenLayers.Marker.Box(bounds)); |
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| 42 | this.map.setCenter(bounds.getCenterLonLat()); |
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| 43 | } else { |
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| 44 | this.map.zoomToMaxExtent(); |
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| 45 | } |
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| 46 | this.map.events.register('click', this.map, this.mapClicked.bind(this)); |
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| 47 | |
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| 48 | document.getElementById(this.id+'_units').innerHTML = this.proj.units; |
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| 49 | document.getElementById(this.id+'_title').innerHTML = this.proj.title; |
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| 50 | document.getElementById(this.id+'_class').innerHTML = this.proj.projName; |
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| 51 | }, |
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| 52 | |
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| 53 | mapClicked: function(ev) { |
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| 54 | var olc = this.map.getLonLatFromViewPortPx(ev.xy); |
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| 55 | c = new Proj4js.Point(olc.lon, olc.lat); |
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| 56 | this.updateCoords(c); |
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| 57 | |
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| 58 | if (this.opposite && this.opposite.proj) { |
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| 59 | var newCoords = this.proj.transform(c, this.opposite.proj); |
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| 60 | this.opposite.updateCoords(newCoords); |
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| 61 | } |
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| 62 | if (this.common) { |
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| 63 | var newCoords = this.proj.inverse(c); |
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| 64 | this.common.updateCoords(newCoords); |
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| 65 | } |
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| 66 | if (this.projected1 && this.projected1.proj) { |
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| 67 | var newCoords = this.projected1.proj.forward(c); |
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| 68 | this.projected1.updateCoords(newCoords); |
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| 69 | } |
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| 70 | if (this.projected2 && this.projected2.proj) { |
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| 71 | var newCoords = this.projected2.proj.forward(c); |
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| 72 | this.projected2.updateCoords(newCoords); |
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| 73 | } |
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| 74 | } |
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| 75 | }; |
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| 76 | |
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| 77 | |
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| 78 | function init() { |
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| 79 | panes['mapLL'] = new ProjPane('mapLL',Proj4js.defaultDatum); |
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| 80 | panes['mapL'] = new ProjPane('mapL'); |
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| 81 | panes['mapR'] = new ProjPane('mapR'); |
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| 82 | |
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| 83 | panes['mapLL'].projected1 = panes['mapL']; |
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| 84 | panes['mapLL'].projected2 = panes['mapR']; |
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| 85 | panes['mapL'].opposite = panes['mapR']; |
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| 86 | panes['mapR'].opposite = panes['mapL']; |
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| 87 | panes['mapL'].common = panes['mapLL']; |
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| 88 | panes['mapR'].common = panes['mapLL']; |
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| 89 | |
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| 90 | }; |
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| 91 | |
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