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Capturing events help

 
john mattucci
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Im building a visual component where the user can drag node(s) from a palette to a main panel. These nodes can be connected to one another with links that one can create by gliding over the node and dragging it to the node that it needs to be connected to. My problem now is how do I determine which way the arrow is going i.e. what if the user is dragging to the left or right ot top or bottom of the node how can I capture this?

Thank you all for your time
 
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