Fix scrolling when dragging near the window edge.

Fix scrolling when dragging near the window edge.

If a charm icon was dragged to the very bottom of the page, the body would
scroll, breaking the page.  This branch prevents that scrolling.

https://code.launchpad.net/~benji/juju-gui/bug-1200412/+merge/174474

(do not edit description out of merge proposal)

[benji, 2013-07-12 18:17:25]

Please take a look.

[benji, 2013-07-12 18:24:26]

Please take a look.

[bac, 2013-07-12 18:45:23]

LGTM  + QA OK

https://codereview.appspot.com/11138044/diff/1/app/views/topology/service.js
File app/views/topology/service.js (left):

https://codereview.appspot.com/11138044/diff/1/app/views/topology/service.js#...
app/views/topology/service.js:435: Y.one('body').setStyle('overflow', 'auto');
Why is this here?  Wasn't it removed in trunk?

[benji, 2013-07-12 19:02:06]

Please take a look.

[jeff.pihach, 2013-07-12 19:09:15]

Thanks for this fix - the original issue is solved however the position fixed is
causing some issues, please see the comment below as the QA is no good.

https://codereview.appspot.com/11138044/diff/6002/app/views/topology/service.js
File app/views/topology/service.js (right):

https://codereview.appspot.com/11138044/diff/6002/app/views/topology/service....
app/views/topology/service.js:441: Y.one('body').setStyle('position', 'static');
we should set the initial style position of the body to static with a comment re
this fix - it will make any potential issues caused by this positioning to
happen right away.

Also what happens if they don't drop it on the canvas? The body will be stuck in
position: fixed.

[benji, 2013-07-12 21:13:27]

Please take a look.