Fixed click on drag and zoom issues

[bbreukelen]

1. Resolved and issue where a drag event would result in a click event after dropping.
   Decision based on the the length of the tap/drag event and the distance moved.
2. Dragging while zoomed in caused issues where the draggable showed at an incorrect position on the screen making it unusable.
   I applied the fix from Kocik's fork. Note that this only works if the container in which the draggable resides has a position: relative. Here is the fork: https://github.com/Kocik/jquery-ui-touch-punch-zoom-fork, thanks Kocik!

[tinnielam]

Recently I had a problem when I tried to click in a draggable.

Your fix actually worked, now I am able to click a button or someelement in a draggable div.

[RWAP]

The lines:

touch.clientX + $(window).scrollLeft(), // clientX + scrollLeft - fix for zoomed devices while dragging touch.clientY + $(window).scrollTop(), // clientY + scrollTop - fix for zoomed devices while dragging

Seem to prevent jQuery.ui sortable from allowing you to drop the item you move on Android and iphone machines...