[Users] {SpamScore: ssss} GeoExt breaks OpenLayers Heatmap

[Dan Ramage]

Ok, I actually am getting the error. What is happening is the
this.map.getLayerPxFromLonLat(someLoc) call is returning null, however you
are trying to access the x member as if something valid were returned. You
need to check the return values of the functions before trying to use them.
I'm not sure why the ext-base.js addition has any effect though.

Dan

From:  julia paredes <japr94 at hotmail.com>
Date:  Wed, 20 Jun 2012 00:23:22 +0000
To:  Dan Ramage <dan at inlet.geol.sc.edu>
Cc:  geoext <users at geoext.org>
Subject:  RE: {SpamScore: ssss} [Users] GeoExt breaks OpenLayers Heatmap


I tried Firefox, ie 9 , safari , and chrome, and I get the same result in
all of them.
I added a single point using the heatmap script and without adding the
ext-base.js and I get the right gradients of colours, from blue to red. But
as soon as I add the ext-base.js the points are shown in black


> Date: Tue, 19 Jun 2012 20:09:40 -0400
> Subject: Re: {SpamScore: ssss} [Users] GeoExt breaks OpenLayers Heatmap
> From: dan at inlet.geol.sc.edu
> To: japr94 at hotmail.com
> CC: users at geoext.org
> 
> What browser are you using. It seems to work in Firefox, or at least I am
> not seeing any errors.
> 
> Dan
> >
> > Hi all,
> > I'm using GeoExt to create a tree node structure for my layers, and I'm
> > using the following heatmap script:
> > http://www.websitedev.de/temp/openlayers-heatmap-layer.htmlThe heatmap
> > functionality breaks in my application when I add this script
> > /ext-3.4.0/adapter/ext/ext-base-debug.js", without making any other
> > changes to my code.
> >
> > It seems that the points are displaying correctly, is just the colour that
> > is not showing properly. Instead of showing the colours, everything is
> > displayed in black with the correct intensity.This is the error that I'm
> > getting:
> > Uncaught TypeError: Cannot read property 'x' of null
> > 
OpenLayers.js:516OpenLayers.Map.OpenLayers.Class.getPixelFromLonLatOpenLayers.js
:516OpenLayers.Map.OpenLayers.Class.getLayerPxFromLonLatOpenLayers.js:519Heatmap
.Layer.OpenLayers.Class.moveToHeatmap.js:252OpenLayers.Map.OpenLayers.Class.move
ToOpenLayers.js:498OpenLayers.Map.OpenLayers.Class.setCenterOpenLayers.js:473Ope
nLayers.Map.OpenLayers.Class.updateSizeOpenLayers.js:464(anonymous
> > function)
> >
> > The line  in the heatmap.js that is pointed in the error list does this
> > var pos = this.map.getLayerPxFromLonLat(src.lonlat);var x = pos.x - rad +
> > offsetX;var y = pos.y - rad + offsetY;
> >
> > Any idea of what is causing this problem?
> > Thanks in advance,
> > Julia
> >
> >               _______________________________________________
> > Users mailing list
> > Users at geoext.org
> > http://www.geoext.org/cgi-bin/mailman/listinfo/users
> >
> 
> 
       


-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.geoext.org/pipermail/users/attachments/20120620/7cef6acd/attachment.htm