[Users] Disable Nodes on Zoom Event

[IT Intern]

My apologies, just realized it is a patch file not a .js, but I still need
to know where exactly it goes...

On Thu, Oct 28, 2010 at 11:15 AM, IT Intern <itintern12 at gmail.com> wrote:

> That's quite awesome!  Thanks Matt.  So now where do I apply this patch :p
>
> Do I just copy the file into
> lib/GeoExt/widgets/treeand override the old LayerNode.js no worries???
>
> cheers,
>
> elshae
>
>
>
> On Thu, Oct 28, 2010 at 10:46 AM, Matt Priour <mpriour at kestrelcomputer.com
> > wrote:
>
>>  OpenLayers already has a Map moveend event handler that will check to
>> see if the layer is still in range (maxExtent, minResolution, maxResolution,
>> minScale & maxScale are all tested)
>> You should use one of these configuration options (maxResolution,
>> minResolution are easiest) on the layers and let OL do the turning on/off
>> layers for you.
>>
>> To have your GeoExt LayerNodes respond by enabling/disabling when layers
>> are in/out of range, you can apply the autoDisable patch [1] attached to
>> Ticket #235 (http://trac.geoext.org/attachment/ticket/235)
>>
>> [1]
>> http://trac.geoext.org/attachment/ticket/235/autoDisableLayerNode.patch
>>
>> Matt Priour
>> Kestrel Computer Consulting
>>
>>
>>
>>  *From:* IT Intern <itintern12 at gmail.com>
>> *Sent:* Thursday, October 28, 2010 9:08 AM
>> *To:* users at geoext.org
>> *Subject:* [Users] Disable Nodes on Zoom Event
>>
>> Hello GeoExt Users,
>>
>> I have a zoom event that when a user zoom in and out of my map certain
>> layers I setVisibility(false).  Now what I would like to do is have another
>> event inside that event which disables the nodes of those layers when their
>> setVisibilty(false) and enables them back when setVisibility(true).  I have
>> some code and it kinda works, but the problem is the checkchange event does
>> not only work when the zoomend event is done, but also anytime a user clicks
>> the layer nodes.  I played a little with stopPropagation and that didn't do
>> anything for me.  Actually I think my zoomend event could be much better
>> coded and I would really love some suggestions.  I appreciate everyone
>> taking their time to help me :)
>>
>> elshae
>>
>> Code:
>>
>> map.events.on({ "zoomend": function (e) {
>>
>>                   layerTree.on("checkchange", function (node, checked) {
>>                     alert(node.text + "Inside event");
>>                     if(checked == false)
>>                         node.disable();
>>                     else if(checked == true)
>>                         node.enable();
>>
>>                 });
>>
>>                       if (this.getZoom() > 7) {
>>                           tib_villages.setVisibility(true);
>>                           tib_lakes.setVisibility(true);
>>                           tib_townships.setVisibility(true);
>>
>>
>>                     }
>>                     else {
>>
>>                                     tib_villages.setVisibility(false);
>>                                     tib_lakes.setVisibility(false);
>>                                     tib_townships.setVisibility(false);
>>
>> //alert(layerTree.tib_villages.node.text);
>>
>>                         if (this.getZoom() > 5) {
>>                               infrastructure.setVisibility(true);
>>                               geography.setVisibility(true);
>>                               geography2.setVisibility(true);
>>                               tib_countys.setVisibility(true);
>>
>>                         }
>>                         else{
>>                             infrastructure.setVisibility(false);
>>                             geography.setVisibility(false);
>>                               geography2.setVisibility(false);
>>                               tib_countys.setVisibility(false);
>>                         }
>>                     }//end else
>>
>>                 }//end function (e)
>>
>>             }); //end map.events.on
>>
>> ------------------------------
>>
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>>
>
>
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