[OpenLayers-Dev] Exception in OpenLayers.Layer.Grid.removeBackBuffer

[Eric Lemoine]

On Thu, Mar 15, 2012 at 8:18 AM, Andreas Hocevar <ahocevar at opengeo.org> wrote:
> Hey,
>
> @Eric: after looking more, I see that OpenLayers.Layer::clone puts all
> properties from the original on the clone:
>
>        // catch any randomly tagged-on properties
>        OpenLayers.Util.applyDefaults(obj, this);
>
> This is also the reason why we manually create a new grid in Layer.WMS::clone.
>
> @Tim: can you please try to apply the following patch and see if it
> fixes the issue?
>
> ----------
> diff --git a/lib/OpenLayers/Layer/Grid.js b/lib/OpenLayers/Layer/Grid.js
> index adf5163..b8e5bd4 100644
> --- a/lib/OpenLayers/Layer/Grid.js
> +++ b/lib/OpenLayers/Layer/Grid.js
> @@ -317,6 +317,8 @@ OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HT
>         // we do not want to copy reference to grid, so we make a new array
>         obj.grid = [];
>         obj.gridResolution = null;
> +        // same for the backbuffer
> +        obj.backBuffer = null;
>
>         return obj;
>     },
> ----------



Good spotting Andreas! I'm looking forward to Tim's feedback.



-- 
Eric Lemoine

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