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gui design pattern question  RSS feed

Dorren Chen
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Making a bookmark manager, just like the one in firefox.

Currently in the main JFrame, I have folder tree at the left, and bookmark list at right side. I have a list of editing buttons on the top, like copy, paste, delete, which apply to either folder or bookmark, depends on which one is selected/highlighted.

how do I implement those button actionlistener, so i don't have to put in a big if loop in every button to check what's the current selected item? later on those same button can apply to other objects, like to-do list entry. I don't want those buttons to be a nightmare to maintain. Ideally the buttons don't have to be modified at all and still can operate on new editable objects. Thanks.
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