There is currently no sufficient equivalent for rich grids in GWT, not to mention widgets controlled by Ajax.
One suitable alternative would be the GXT live grid , but this is just going out of the pan into the fire, since you have to work with GXT instead of SmartGWT.
GWT was not intended to be used as a widget library, providing a wide selection of user interface widgets, but simply providing a solid infrastructure for Java programmers to easily create rich Ajax web applications. It can (and should) be supplemented with additional widget libraries to compensate for its absence.
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