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<html xmlns="http://www.w3.org/1999/xhtml"> |
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<head> |
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<title>Draw Feature Example</title> |
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|
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<link rel="stylesheet" href="../theme/default/style.css" type="text/css" /> |
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<link rel="stylesheet" href="style.css" type="text/css" /> |
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<style type="text/css"> |
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#controlToggle li { |
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list-style: none; |
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} |
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p { |
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width: 512px; |
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} |
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</style> |
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<script src="../lib/OpenLayers.js"></script> |
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<script type="text/javascript"> |
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var map, drawControls; |
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OpenLayers.Util.onImageLoadErrorColor = "transparent"; |
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function init(){ |
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map = new OpenLayers.Map('map'); |
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|
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var wmsLayer = new OpenLayers.Layer.WMS( "OpenLayers WMS", |
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"http://labs.metacarta.com/wms/vmap0?", {layers: 'basic'}); |
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|
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var pointLayer = new OpenLayers.Layer.Vector("Point Layer"); |
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var lineLayer = new OpenLayers.Layer.Vector("Line Layer"); |
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var polygonLayer = new OpenLayers.Layer.Vector("Polygon Layer"); |
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|
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map.addLayers([wmsLayer, pointLayer, lineLayer, polygonLayer]); |
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map.addControl(new OpenLayers.Control.LayerSwitcher()); |
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map.addControl(new OpenLayers.Control.MousePosition()); |
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|
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var options = {handlerOptions: {freehand: true}}; |
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drawControls = { |
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point: new OpenLayers.Control.DrawFeature(pointLayer, |
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OpenLayers.Handler.Point), |
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line: new OpenLayers.Control.DrawFeature(lineLayer, |
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OpenLayers.Handler.Path, options), |
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polygon: new OpenLayers.Control.DrawFeature(polygonLayer, |
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OpenLayers.Handler.Polygon, options) |
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}; |
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|
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for(var key in drawControls) { |
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map.addControl(drawControls[key]); |
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} |
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|
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map.setCenter(new OpenLayers.LonLat(0, 0), 3); |
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|
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document.getElementById('noneToggle').checked = true; |
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} |
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|
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function toggleControl(element) { |
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for(key in drawControls) { |
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var control = drawControls[key]; |
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if(element.value == key && element.checked) { |
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control.activate(); |
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} else { |
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control.deactivate(); |
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} |
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} |
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} |
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</script> |
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</head> |
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<body onload="init()"> |
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<h1 id="title">OpenLayers Draw Feature Example</h1> |
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|
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<div id="tags"></div> |
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|
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<p id="shortdesc"> |
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Demonstrate on-screen digitizing tools for point, line, and polygon creation. |
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</p> |
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|
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<div id="map" class="smallmap"></div> |
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|
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<ul id="controlToggle"> |
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<li> |
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<input type="radio" name="type" value="none" id="noneToggle" |
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onclick="toggleControl(this);" checked="checked" /> |
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<label for="noneToggle">navigate</label> |
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</li> |
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<li> |
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<input type="radio" name="type" value="point" id="pointToggle" onclick="toggleControl(this);" /> |
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<label for="pointToggle">draw point</label> |
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</li> |
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<li> |
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<input type="radio" name="type" value="line" id="lineToggle" onclick="toggleControl(this);" /> |
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<label for="lineToggle">draw line</label> |
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</li> |
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<li> |
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<input type="radio" name="type" value="polygon" id="polygonToggle" onclick="toggleControl(this);" /> |
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<label for="polygonToggle">draw polygon</label> |
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</li> |
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</ul> |
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|
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<div id="docs"> |
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<p>Feature digitizing is in freehand mode by default. In freehand mode, the mouse is treated as a pen. |
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Drawing begins on mouse down, continues with every mouse move, and ends with mouse up.</p> |
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<p>To turn freehand mode off, hold down the shift key while digitizing. With freehand mode off, one |
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vertex is added with each click and double-clicks finish drawing. Freehand mode can be toggled on and off |
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at any time while drawing.</p> |
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</div> |
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</body> |
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</html> |
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