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ExtGWT Rich Internet Application Cookbook by Odili Charles Opute

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DnD across components

Drag-and-drop operations, especially as seen in the first recipe of this chapter, can be carried out with any widget and from any part of the screen to another. Therefore, nothing stops us from dragging a node from a tree of tasks, a record from a grid of tickets, or an item from a list of orders, into a form for processing. Better still, we could drag a collection of these items (tasks, tickets, or orders) into a visualization region and get a pie chart plot of some sort.

This kind of functionality is not only desirable but can improve the user experience and provide instant gratification. We will demonstrate it by creating an instance of ListView that lists customers from which we are expected to drag items into the Male ...

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