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Drag & drop GUI

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Hi all,

I'm looking to develop a drag and drop gui for an application i'm
writing and although pretty familiar with the java language/awt this
is the first time i've needed to use this style of gui and i'm not
sure exactly which classes i should use as the basis for the program.

I would like a gui where a user can select one of a number of 'blocks'
(fixed size images representing data objects) that can be selected
from a menu, dropped onto a blank 'canvas' area of the interface and
then 'connected' to each other (the connections being represented
graphically but also in the data structure).

Each block must then respond to events-such as clicking on each unit
would open a window that would allow the data object parameters to be
displayed and edited, dragging the blocks around the area to
reposition them etc.

This type of interface would be familiar to anyone who has used any of
the popular modular 'software synthesizers' that are currently

Can anyone give any advice as to the best classes to extend to allow
this type of functionality and any problems i might encounter.


Jul 17 '05 #1
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