[OpenLayers-Users] GeoJSON and SelectFeature control

[Adorian Ardelean]

Hi Robert,

For this specific application I have not included the modifyFeature control,
but information on patch is helpful because I have another application that
involves both controls. Unfortunatelly, this second application is too
embedded in a CMS-like environment and it will require me some time to
extract code and test it separately. But I am looking forward to do it.

Thank you for your involvement,
Adorian




On Tue, Nov 4, 2008 at 8:40 PM, Robert Sanson <SansonR at asurequality.com>wrote:

>  Hi Adorian
>
> Do you remember Eric Lemoine saying that the selectFeature and
> modifyFeature controls don't behave well together - there is a patch for
> that:
>
> See #1741. That would be good to know if the patch makes your problem
> go away. Eric
>
> 2008/10/16, Eric Lemoine <eric.c2c at gmail.com>:
> > Hi. Do you also have a modify feature control? The select feature and
> > modify feature controls are known not to play well together. There
> > already is a ticket about that, and patch attached to it. Eric
> >
>  Maybe you are experiencing something similar?
>
> Robert S
>
> >>> "Adorian Ardelean" <mynature at gmail.com> 4/11/2008 7:43 p.m. >>>
>
> Hi Robert,
>
> Thank you for your reply! I have a very similar way to load the geoJSON
> file and handle the controls outside map div. Except that I put part of code
> for loading geoJSON in a function: I want only one GeoJSON layer in which I
> load/switch an indeterminate number of GeoJSON files. This part is working
> well.
>
> In this project I have actually two vector layers: One which is used just
> for drawing things on map (temporarily) and the other one which is the
> GeoJSON layer. For both vector layers I've declared distinct SelectFeature
> controls with intention of calling a "featureinfo" function. Beside this I
> include a draw polygon and delete feature control (the last one is again a
> SelectFeature control actually). It seems that functionality was affected by
> the way I have declared the controls, and one of the controls "did not like"
> going with the others.
>
> In the end I found a "solution" and the thing is working now. I currently
> have no idea why it did not work and why is now working. But I am happy with
> the result.
> See below two code versions of how I declare controls:
>
> example 1 :
> controls = {
>             polygon: new
> OpenLayers.Control.DrawFeature(vectors,OpenLayers.Handler.Polygon),
>             polygoninfo: new OpenLayers.Control.SelectFeature(vectors,
> {hover: true, onSelect: serialize}),
>             deletepolygon: new OpenLayers.Control.SelectFeature(vectors,
> {callbacks: {'click': deleteFeature}}),
>             regioninfo: new OpenLayers.Control.SelectFeature(regions,
> {callbacks: {'click': serialize}})
>             };
>
> example 1 is not working: delete and select functions do not work for both
> vector layers (vectors and regions). only draw polygon works corectly.
>
> example 2:
> controls = {
>             polygon: new
> OpenLayers.Control.DrawFeature(vectors,OpenLayers.Handler.Polygon),
>             };
>
> var polygoninfo = new OpenLayers.Control.SelectFeature(vectors, {hover:
> true, onSelect: serialize});
> var deletepolygon = new OpenLayers.Control.SelectFeature(vectors,
> {callbacks: {'click': deleteFeature}});
> var regioninfo = new OpenLayers.Control.SelectFeature(regions, {callbacks:
> {'click': serialize}});
>
> map.addControl(polygoninfo);
> polygoninfo.activate();
> map.addControl(deletepolygon);
> deletepolygon.activate();
> map.addControl(regioninfo);
> regioninfo.activate();
>
> example 2 is working only partially. All controls work except regioninfo.
>
> example 3:
> controls = {
>             polygon: new
> OpenLayers.Control.DrawFeature(vectors,OpenLayers.Handler.Polygon),
>             polygoninfo: new OpenLayers.Control.SelectFeature(vectors,
> {hover: true, onSelect: serialize}),
>             regioninfo: new OpenLayers.Control.SelectFeature(regions,
> {callbacks: {'click': serialize}})
>             };
>
> var deletepolygon = new OpenLayers.Control.SelectFeature(vectors,
> {callbacks: {'click': deleteFeature}});
> map.addControl(deletepolygon);
> deletepolygon.activate();
>
> example 3 is working well. all functions are doing what they are supposed
> to do. Personally I would prefer version 1 of code. However, since version 3
> does the job I am glad that I could pass this point. It must be something I
> do wrong when I declare callbacks or...I don't know....
>
> Thank you again for your input,
> Adorian
>
> --
> Dr. Adorian Ardelean
> coordinator of myNature Project
>
> http://mybiosis.info/nature/portal.php?pagename=firstpage [a Romanian
> biodiversity-database]
> http://mybiosis.info/nature/portal.php?pagename=adorian [CV]
>
>
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>
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-- 
Dr. Adorian Ardelean
coordinator of myNature Project

http://mybiosis.info/nature/portal.php?pagename=firstpage [a Romanian
biodiversity-database]
http://mybiosis.info/nature/portal.php?pagename=adorian [CV]
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