animated panning

From legwork done by Duarte C.:

Here is a link with a working example:
http://sigims.edia.pt/gmaps/final/openlayers_page.html

There is a function that determines how the slide is calculated - if
it's smoother, linear, exponential, etc. At this time it's a power
curve, so initially the movement is bigger and then slows down. This can
be changed by using other curves, as can be seen in moofx
(http://moofx.mad4milk.net/).

<snip>

Finally, you should be aware that I perused an example of animation in
www.hesido.com. It seems free since he encourages others to use the
examples and that's just what I did.

and later from Brian L

One thing if I may suggest is to build the slide capability as a property of
the Map.  Thus allowing the slide enablement and effect to be set through
properties of the Map instead of the control.  In this case any standard or
custom control performing a map movement operation (pan, setCenter) can take
advantage of the slide effect when enabled.  Thanks for your contribution!

patchification of code from portugal.. thanks duarte for the leads!

fix bug in layers.js; add unit tests

Demo with animated zooming (#442)

This code needs to be cleaned up: There are a couple things in the patch that are totally unrelated to panning/zooming, which should be removed, and it needs updating to trunk.

path including a new panTo method, tween and ease methods

Proposed patch includes a new panTo method. Tween and Ease object are supposed to be generic and useful for other purposes.

Patch updated with issues fixed and panTo used in the overviewmap control.

Enhancement : panTween need to be stopped in case user drags the map manually before the animation is finished.

Pierre, I've just applied your patch to trunk and the tween.html example gives me errors:

callback.call is not a function

Add version of animated panning:

• With cancel-on-drag support
• With pan as a wrapper for panTo
• With a more fun example (dancing map!)

Pierre, I'd love if you could take a look at this. It depends on the patch I've uploaded for 962, and your approval of 1308, which I'm set with.

Oh, and it's available for demo/playing in:

http://dev.openlayers.org/sandbox/crschmidt/animated_panning/

There seems to be something wrong with normal panning ... if you just pan the map (in Safari and FF2), the point under the mouse smoothly scrolls to the center after you drop it?

It's a bug in the Click Handler, not the panning code; expect a patch in trunk before the night is out.

(In [6067]) Merge from 6030:HEAD from trunk, primarily to fix up fix to Handler.Click (See #110)

New title ("Animated Panning", instead of tween)

use new 'caller' instead of 'source'

This is ready for commit now. All tests pass under FF2 and IE6.

One last note, I would have preferred something named 'animate' instead of 'immediate' and given a true value by default, because it's easier to understand I think. However, you can commit this.

(In [6111]) Add support for animated panning, with most of the work done by Pierre, thx pierre! panTo method now animates when moving. (Closes #110)