Agreed and I was hoping to do that the other day when I ran up against this problem, but when I checked the available layer events was reminded again that there was no added or removed events on the layer.
So, yes that is an elegant solution, but in the meantime, wouldn't using an optional map configuration property be the most reasonable solution? Matt Priour Kestrel Computer Consulting -------------------------------------------------- From: "Andreas Hocevar" <[email protected]> Sent: Wednesday, January 12, 2011 1:40 PM To: "Alexandre Dube" <[email protected]> Cc: <[email protected]> Subject: Re: [Dev] Lazy loading of map panel layers > Hi, > > a very elegant solution, which depends on > http://trac.osgeo.org/openlayers/ticket/2983, would be to register for the > layer's "added" event and continue when it is added. > > Andreas. > > On Jan 12, 2011, at 20:18 , Alexandre Dube wrote: > >> Hi, >> >> I just hit the exact same issue here. I was using an old proposed >> patch on ticket 235 [1] where the layer record, when rendered, registers >> an event to the record.layer.map, but the layer hasn't been added to the >> map yet so it's null. >> >> I'll try the Mixin pluggin instead, but I can see in it that it's >> guessing the mappanel and in my app I have two. I'll see what it does... >> >> Figured it was useful to tell. >> >> Regards, >> >> Alexandre >> >> [1] http://trac.geoext.org/ticket/235 >> >> >> On 11-01-12 11:50 AM, Matt Priour wrote: >>> Forgot the ticket link: >>> [1] http://trac.geoext.org/ticket/396 >>> >>> Matt Priour >>> Kestrel Computer Consulting >>> >>> -------------------------------------------------- >>> From: "Matt Priour"<[email protected]> >>> Sent: Wednesday, January 12, 2011 9:10 AM >>> To: "Eric Lemoine"<[email protected]> >>> Cc: "GeoEXT Dev"<[email protected]> >>> Subject: Re: [Dev] Lazy loading of map panel layers >>> >>>> Thanks for that suggestion Eric. >>>> I have opened a ticket [1] for this issue, and attached a patch with an >>>> example fix for two classes. If this approach seems sound, then I would >>>> be >>>> happy to fix the remaining 7 components and add tests for this use >>>> case. >>>> >>>> An alternative approach would be to add the GeoExt.MapPanel's map >>>> property >>>> to the layers in the GeoExt.MapPanel layers configuration option when >>>> it >>>> uses an array of OpenLayers.Layer objects. However, that could >>>> interfere >>>> with OpenLayers code and various tests it does to determine if a layer >>>> has >>>> been added to a map or not. So I don't think that is a good approach. >>>> >>>> -------------------------------------------------- >>>> From: "Eric Lemoine"<[email protected]> >>>> Sent: Wednesday, January 12, 2011 12:45 AM >>>> To: "Matt Priour"<[email protected]> >>>> Cc: "GeoEXT Dev"<[email protected]> >>>> Subject: Re: [Dev] Lazy loading of map panel layers >>>> >>>>> On Wednesday, January 12, 2011, Matt >>>>> Priour<[email protected]> >>>>> wrote: >>>>>> Given the change in the way layers configured in the map panel are >>>>>> loaded >>>>>> in >>>>>> the map: >>>>>> >>>>>> (http://trac.geoext.org/wiki/Release/1.0/Notes): "Layers configured >>>>>> in >>>>>> the >>>>>> MapPanel's layers property won't be added to the map before it is >>>>>> rendered. >>>>>> This is a behavioral change that may require changes in code that >>>>>> relies >>>>>> on >>>>>> a layer's map property before the map is rendered." >>>>>> >>>>>> Are there plans to change the internal GeoExt code so that components >>>>>> which >>>>>> rely on the layer's map property are initialized after the layer is >>>>>> added >>>>>> to >>>>>> the map or instead use the GeoExt.MapPanel.guess() and its map >>>>>> property. >>>>>> >>>>>> I recently ran into this problem when attempting to use a GridPanel >>>>>> configured with a FeatureStore and a FeatureSelectionModel. I'm sure >>>>>> other >>>>>> components also have this issue. I solved it by manually binding the >>>>>> FeatureStore and FeatureSelectionModel in an 'afterrender' listener >>>>>> for >>>>>> the >>>>>> MapPanel. >>>>> Would that solve the issue if these components could be optionally be >>>>> configured with a Map or a MapPanel? >>>>> >>>>> -- >>>>> Eric Lemoine >>>>> >>>>> Camptocamp France SAS >>>>> Savoie Technolac, BP 352 >>>>> 73377 Le Bourget du Lac, Cedex >>>>> >>>>> Tel : 00 33 4 79 44 44 96 >>>>> Mail : [email protected] >>>>> http://www.camptocamp.com >>>>> >>>> _______________________________________________ >>>> Dev mailing list >>>> [email protected] >>>> http://www.geoext.org/cgi-bin/mailman/listinfo/dev >>>> >>> _______________________________________________ >>> Dev mailing list >>> [email protected] >>> http://www.geoext.org/cgi-bin/mailman/listinfo/dev >> >> >> -- >> Alexandre Dubé >> Mapgears >> www.mapgears.com >> >> _______________________________________________ >> Dev mailing list >> [email protected] >> http://www.geoext.org/cgi-bin/mailman/listinfo/dev > > > > -- > Andreas Hocevar > OpenGeo - http://opengeo.org/ > Expert service straight from the developers. > > _______________________________________________ > Dev mailing list > [email protected] > http://www.geoext.org/cgi-bin/mailman/listinfo/dev > _______________________________________________ Dev mailing list [email protected] http://www.geoext.org/cgi-bin/mailman/listinfo/dev
