Which Listener I should use if I drag and Drop an image/icon into a JPanel?

Dar Friends:
Happy new year.
I try to drag and Drop an image/icon into a JPanel, and hope I can immediately detect it after DND,
Which Listener I should use in this JPanel if I drag and Drop an image/icon into a JPanel??
Thanks

Thank camickr .
I can dnd an image into a JPanel called JPanelOld already, I hope to use another JPanel or JTree to listen to any Dropped Image in JPanelOld later on so I can take some action in another JPanel or JTree.
so what kind of Listener I should use for my purpose??
where to add this Listeners??
Happy New Year.

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Right now in iPhoto08, any serious organization is done in folders and albums. Personally, I think they need to combine the two concepts -- the great "mouse over" view of events with the organization abilities of folders and albums. I'd like an albums view where I can mouse over the albums. Actually, Aperture 2's interface for organization is more functional than iPhoto, so I am hoping some of that benefit creeps into the next iPhoto release.
What I do is: I use events for high level grouping (like Winter 2007) and I organize folders and albums to break that down further ("trip to Montreal" "Christmas" etc.). But I do it backwards. I fill albums first, then I organize events.
When I drag in pictures to iPhoto, first I make the target album in iPhoto that I want to populate, then I drag the photo directly to that album (not to events). iPhoto automatically puts the photo into the album I created and also into a new event. Later, I go into events, right-click on this new event to "open event in separate window" then I move around the events view, to drop in the pictures from the "import" event I just created. If I move all the pictures into other events, iPhoto automatically deletes the event I just emptied. You could skip the event organization all together if you wanted to, but you'd lose the cool mouse-over feature, which can be handy.
One nice thing about having events AND albums is you can have the photo just once in iPhoto, in an event, but then have the photo appear in as many albums as you want (as well as projects and web galleries) all while only having one photo on your hard drive. So, there are benefits to events, but I think iPhoto is missing just a couple little bits of organizational ability to make it perfect. (and yes, I've submitted this all to Apple as feature requests)
Just in case you don't know -- events don't have any hierarchy. That is, you can't nest events. But you can have folders with subfolders, and any folder can contain albums. Albums cannot have sub-albums, and folders don't hold photos. Only albums hold photos, and folders (or sub-folders) hold albums. Try create some folders and albums and you'll get the hang of it. One other issue that Apple needs to address. When you create a new folder or album, it doesn't put it right where you want it, but rather puts it at the bottom of the list, so you have to drag it up to where you want it. Try it out, and you'll see what I mean, then submit it as a feature request to improve that.
I agree it's not perfect, but it's not too bad once you get used to it. And the benefits of working with the rest of the features of iPhoto is worth it. I'm just really hoping they do a few tweaks on the next release. They are near greatness here. They could just use a little nudge on the last bits. (in my opinion of course. Others may disagree, but I've talked to enough people who have the same issues you are having to know we are not alone on this).

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