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POForcing an OpenLayers Markers layer to draw on top, and having selectable layers beneath
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  1. POForcing an OpenLayers Markers layer to draw on top, and having selectable layers beneath
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    copied!<p>I have an OpenLayers map with a raster base layer, a vector layer and a markers layer in that order. They display fine, in the correct order with the markers on top of the vectors, great.</p> <p>But when I add a SelectFeature Control and point it to the vector layer, it is suddenly drawn above the markers layer, despite all efforts to raise the marker layer or setting the Z index. It seems that the SelectFeature control overrides all drawing order settings. Is this by design, or can I overcome this somehow?</p> <p>The layer definitions:</p> <pre><code>var baselayer = new OpenLayers.Layer.WMS('Norden', 'http://{myarcgisserver}/ArcGIS/services/mylayer/MapServer/WMSServer', { layers :'1,2', transparent :false, width :'auto', height :'auto', filter :null }, { isBaseLayer: true, singleTile :true, ratio :1, alpha :false, transitionEffect :'resize' }); var vectorLayer = new OpenLayers.Layer.Vector("Work orders", { projection: new OpenLayers.Projection("EPSG:2400"), strategies: [new OpenLayers.Strategy.Fixed(), refresh], protocol: new OpenLayers.Protocol.HTTP({ url: "/WorkOrder/WorkOrders.ashx?output=geojson", format: new OpenLayers.Format.GeoJSON() }) }); var markerlayer = new OpenLayers.Layer.Markers("Markers", { projection: new OpenLayers.Projection("EPSG:2400"), displayInLayerSwitcher: false } ); </code></pre> <p>The control definition:</p> <pre><code>var selectctrl = new OpenLayers.Control.SelectFeature( vectorLayer, { clickout: true, toggle: false, multiple: false, hover: false, toggleKey: "ctrlKey", // ctrl key removes from selection multipleKey: "shiftKey", // shift key adds to selection box: false } ); </code></pre> <p>Activation: (Without this, the layers draw in correct order)</p> <pre><code>map.addControl(selectctrl); selectctrl.activate(); </code></pre> <p>Edit: Found this in OpenLayers.Handler.Feature, where the "moveLayerToTop" feels like the culprit... Will try to overcome it, but if someone knows it to be impossible, please let me know! </p> <pre><code>/** * Method: activate * Turn on the handler. Returns false if the handler was already active. * * Returns: * {Boolean} */ activate: function() { var activated = false; if(OpenLayers.Handler.prototype.activate.apply(this, arguments)) { this.moveLayerToTop(); this.map.events.on({ "removelayer": this.handleMapEvents, "changelayer": this.handleMapEvents, scope: this }); activated = true; } return activated; }, </code></pre>
 

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