[Users] Layer's Visibility and Tree Panel

[Andreas Hocevar]

Hi,

use measureLayer.setVisibility(true/false) instead of 
measureLayer.display(true/false) to show/hide the layer, otherwise no 
event will get fired and the TreeNode does not know.

Regards,
Andreas.

Vince Lotito wrote:
> I am trying to synchronize the visibility of a vector layer where I persist measurement sketch.  So during the create of the measure control I am display the layer as follows:
> 
>     // create the line measure tool
>     var lineMeasure = new OpenLayers.Control.Measure(
>             OpenLayers.Handler.Path, {
>                 persist: false,
>                 geodesic: true,
>                 displaySystem: "english",
>                 callbacks: {
>                     create: function() {
>                          measureLayer.display(true);     // forcing the layer to display
>                         }
>             },
>                 handlerOptions: {
>                         layerOptions: {styleMap: styleMap}
>                 }
>             }
>     );
> 
> I have a tree panel with the layers as follows:
> 
> var tree = new Ext.tree.TreePanel({
>         border: true,
>         region: "north",
>         title: "RPD Layers",
>         width: 200,
>         minSize: 150,
>         split: true,
>         collapsible: true,
>         autoScroll: true,
>         loader: new Ext.tree.TreeLoader({
>             applyLoader: false,
>         }),
>         root: {
>             nodeType: "async",
>             children :[{
>                                     nodeType: "gx_baselayercontainer"
>                             }, {
>                                     nodeType: "gx_overlaylayercontainer",
>                                     expanded: true,
>                                     loader: {
>                                          filter: function(record) {
>                                                   if ( (record.get("layer").name.indexOf("Measure") == 0) ||
>                                                        (record.get("layer").name.indexOf("Property") == 0) ||
>                                                        (record.get("layer").name.indexOf("RPD") == 0) ||
>                                                        (record.get("layer").name.indexOf("Open") == 0)) {
>                                                        return false;
>                                                   }
>                                                   return true;
>                                                 }
>                                     }
>                             }, {
>                                     nodeType: "gx_layercontainer",
>                                     text: "Graphics",
>                                     expanded: true,
>                                     loader: {
>                                          filter: function(record) {
>                                                 if ( (record.get("layer").name.indexOf("Measure") == 0) ||
>                                                      (record.get("layer").name.indexOf("Property") == 0)) {
>                                                       return true;
>                                                 }
>                                                 return false;
> 
>                                         }
>                                     }
>                 }]
> 
>         },
>         rootVisible: false,
>         lines: false
>     });
> 
> How can I synchronize the tree child node's (for the vector layer) check box with the visibility if the layer in the map panel?
> 
> Vince
> 
> 
> 
> 
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-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.