Two pits encountered with jQueryUI draggable and droppable

jQueryUI's drag-and-drop plugin greatly facilitates the developer's implementation of the drag-and-drop function, but the official tutorial is too general, in the concrete implementation of a lot of places are not clear, here say I met two "small pits":

The Clone property of the 1:draggable.

2:droppable accept the positioning of the drag control (where to put it)

First is the first "pit", in doing something similar to the editor, we need to implement a similar drag control function, that is, from the toolbar to the "formula bar". This requires the Clone property, and the formula bar does not display the clone control when you use this property to achieve the effect. The verification needs to be accepted (added) in the acceptance column, which is the edit bar.

The code doesn't have a screenshot.

Next is the second "pit": the positioning of the dragged control is actually very simple to do an absolute positioning and set the distance from the left of the upper margin is OK, I am not familiar with the plug-in Leng out of the pit (⊙﹏⊙) ~ ~ ~

Graphic:

Thought through the very good understanding, the code here is very simple, is to specify the use of drag-and-drop plug-in process of two blind spots ~ I hope that the development of the novice (including me ~ ~ ~) Some help!

Two pits encountered with jQueryUI draggable and droppable