how to remove vector feature?
body onload the map
after that click drop down menu(onchange) remove it.
but i cant remove feature
any mistake with my code?
thanks~~!!
sample code as below:
*javascript*
var map, layer;
//var url =
"http://data.mapguide.com/mapguide/mapagent/mapagent.fcgi?USERNAME=Anonymous&";;
//you can use this URL when MapGuide OS is installed locally
var url = "http://localhost:8008/mapguide/mapagent/mapagent.fcgi";;
//Adjust the scale assumptions for MapGuide layers
//Tiled layers MUST use a DPI value of 96, untiled layers can use a
//different DPI value which will be passed to the server as a parameter.
//Tiled and untiled layers must adjust the OL INCHES_PER_UNIT values
//for any degree-based projections.
var metersPerUnit = 1; //value returned from mapguide
var inPerUnit = OpenLayers.INCHES_PER_UNIT.m * metersPerUnit;
OpenLayers.INCHES_PER_UNIT["dd"] = inPerUnit;
OpenLayers.INCHES_PER_UNIT["degrees"] = inPerUnit;
OpenLayers.DOTS_PER_INCH = 96;
function init() {
var extent = new OpenLayers.Bounds(-180,-80,180,80);
var mapOptions = {
maxExtent: extent,
controls: [
new OpenLayers.Control.Navigation(),
new OpenLayers.Control.PanZoomBar(),
new OpenLayers.Control.MousePosition()
]
};
map = new OpenLayers.Map( 'map', mapOptions );
var options = {
singleTile: true,
isBaseLayer: true,
visibility: true,
/* useAsyncOverlay: true, */ //<- remove
//useOverlay:true
};
var params = {
mapdefinition: 'Library://sample/Maps/sample.MapDefinition'
};
var layer = new OpenLayers.Layer.MapGuide( "sample", url, params,
options
);
map.addLayer(layer);
var vectorLayer = new OpenLayers.Layer.Vector("vector layer1");
var feature = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Point(180,80),
{some:'data'},
{externalGraphic: 'images/car1.png', graphicHeight: 21,
graphicWidth:
16});
vectorLayer.addFeatures(feature);
map.addLayer(vectorLayer);
map.addControl(new OpenLayers.Control.LayerSwitcher());
map.zoomToMaxExtent();
map.setCenter(new OpenLayers.LonLat(180,80), 4);
}
function remove(sel){
vectorLayer.removeFeatures(feature);
}
*html part*
<body onload="init();">
<div>
<select id="sel" name="sel"
onchange="remove(this.value)"><option></option><option
value="Y">Remove</option></select>
<div id="map" >
</div>
</div>
</body>
--
View this message in context:
http://osgeo-org.1560.n6.nabble.com/remove-feature-problem-tp5001007.html
Sent from the MapGuide Users mailing list archive at Nabble.com.
_______________________________________________
mapguide-users mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/mapguide-users
