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Tree Node Open Leaf & Drag Over

 
Isaac Hewitt
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Netbeans IDE
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I am using the Nimbus look and feel and a JTree. When the user drags the mouse over the JTree a horizontal bar appears through the file or folder that corresponds to the mouse's coordinates. If the mouse hovers over a directory or folder, there is a delay period before the directory opens to reveal the files inside the JTree. Is there any way of speeding up this time delay so the folder opens as soon as the hovering mouse reaches the directory?
Thanks.

 
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