[OpenLayers-Users] issue with mousewheel zoom...

[Erik Uzureau]

I think that John brings up some very good points (and illustrates
them well also) in this email.

I have reopened 341[1] with his comments included, and I have made a
new 'animated zooming' [2] ticket that I think should be considered
with 'animated panning' [3]

[1] http://trac.openlayers.org/ticket/341
[2] http://trac.openlayers.org/ticket/442
[2] http://trac.openlayers.org/ticket/110

On 12/8/06, John Cole <john.cole at uai.com> wrote:
> I saw that mouse wheel zooming recently changed to zoom to the point under
> the mouse.  Unfortunately, there is a problem with the current
> implementation.  It would be nice to have an option to use the simpler zoom
> in/out on center also.
>
> When you allow multiple zooms on the mouse wheel, you will end up somewhere
> other than where your mouse is.  The reason for this is the new center point
> is calculated with the new zoom level boundaries, instead of the original.
> The mouse zoom should not update the extent until the map has reloaded.
>
> For an example, using the SVN openlayers, bring up a map with the
> mousedefault control, put the mouse over a feature near the edge of the map
> and give the mouse wheel a good turn up (zoom in), the new zoom point will
> have drifted way off, and your feature will not appear on the map.  If you
> scroll only on click, it works perfectly.
>
> Also, is there a way to expand or shrink a layer, so that when you zoom, the
> map can be expanded/shrunk in real time until the layers can be refreshed?
> Doing this really helps visualize where your zooming to and it is really
> important when mouse wheel zooming to know what level your zooming to.
>
> Finally,  when mouse wheel zooming, if you zoom in or out and back to your
> original level, it should be treated as a pan or simply canceled, so the
> layers don't (necessarily) have to be refreshed.
>
> Thanks,
>
> John Cole
> This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the sender. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail.
> _______________________________________________
> Users mailing list
> Users at openlayers.org
> http://openlayers.org/mailman/listinfo/users
>