[Users] GeoExt2 Sublayer Example?

[Francesco D'Alesio]

Hello Dave, 

I'm sorry, I misunderstood your initial question. 

I'm dealing with a layers container, so I built a plugin for a
layergroup node that holds OpenLayers.Layer instances. 

I'm not using the "layers" param of OpenLayers.Layer as in
LayerParamLoader 

However, here's the code 

/**
 * The LayerFolder plugin. This is used to create a node that holds
multiple layers, keeping checkboxes syncd
 * {plugins: ['gx_layerfolder'], ...}
 *
 */
 Ext.define('GeoExt.tree.LayerFolderNode', {
 extend: 'Ext.AbstractPlugin',
 alias: 'plugin.gx_layerfolder', 

init: function(target) {
 var me = this,
 checked = true,
 layer;

 target.eachChild(function(node) {
 layer = node.get('layer');
 if(!layer.getVisibility()) checked = false;
 layer.events.on({
 'visibilitychanged' : me.onChildLayerVisibilityChanged,
 scope: me
 });
 });
 target.set('checked', checked);

 target.on('afteredit', function(node, modifiedFields) {
 if(~Ext.Array.indexOf(modifiedFields, 'checked')) {
 me.onCheckChange();
 }
 });

 me.target = target;
 }, 

/**
 * @private
 * Updates the visibility of the child layers
 * node.
 */
 onCheckChange: function() {
 var node = this.target,
 checked = this.target.get('checked'); 

if(!node._visibilityChanging) return;

 node._visibilityChanging = true;
 node.eachChild(function(node) {
 node.get('layer').setVisibility(checked);
 });
 delete node._visibilityChanging;
 },

 /**
 * @private
 * Updates the visibility this node, when children visibility changes
 *
 */
 onChildLayerVisibilityChanged: function() {
 var node = this.target;

 if(!node._visibilityChanging) return;

 var checked = true;
 node.eachChild(function(childNode) {
 if(!childNode.get('layer').getVisibility()) checked = false;
 });
 node._visibilityChanging = true;
 node.set('checked', checked);
 delete node._visibilityChanging;
 } 

}); 

Francesco 

-------Dave Kliphon  wrote-------- 

Subject: RE: [Users] GeoExt2 Sublayer Example? 

Date: 19.02.2013 21:39 

   
> 
> Francesco, 
> 
> It seems that we would need to develop both layer node group and group
> loader classes, similar to the LayerParamNode and LayerParamLoader
> scripts in v1.1. Pass along any code examples if you have them,
> otherwise we will follow your lead in developing this custom sub-layer
> capability. 
> 
> Do you or does anyone know if the sub-layer feature will ultimately be
> revived in GeoExt2, and is there a GeoExt2 release date? 
> 
> Thanks for your help, 
> 
> Dave 
> 
> FROM: Francesco D'Alesio [mailto:francesco.dalesio at r3-gis.com]
>  SENT: Tuesday, February 19, 2013 2:00 AM
>  TO: Dave Kliphon
>  CC: users at geoext.org
>  SUBJECT: Re: [Users] GeoExt2 Sublayer Example?   
> 
> Hello Dave,
>  I've defined a layegroup plugin, similar to GeoExt.tree.LayerNode ,
> that simply get \"checked\" from children and pass the \"check change\"
> event to children.
> 
>  Francesco
> 
>  Il 18/02/2013 22:59, Dave Kliphon ha scritto:   
> > 
> > Does anyone have an example of sublayer creation in GeoExt2? It
> > appears that examples/tree/tree.js is incomplete in this respect (the
> > Tasmanian Group Layer is a single tier, unlike in 1.1). 
> > 
> > If there are no examples, is there a timeframe for release, or advice
> > on developing a temporary solution? 
> > 
> > Thanks! 
> > 
> > Dave 
> > 
> > 
> > _______________________________________________
> >  
> > 
> > Users mailing list
> >  
> > 
> > <a href=\\\"mailto:Users at geoext.org\\\">Users at geoext.org</a>
> >  
> > 
> > <a
> > href=\\\"http://www.geoext.org/cgi-bin/mailman/listinfo/users\\\">http://www.geoext.org/cgi-bin/mailman/listinfo/users</a>
> >  
> 
> --  
> 
>        
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