Grouping data in GXT grids is simple and powerful, allowing users to easily make insightful deductions from the data. The
Grid component can also be configured to aggregate the data in columns such that we can see a summation or average computation of a column having numeric data.
However, whether grouped or aggregated, we have no way of reflecting changes to the data without having to re-group the records or programmatically redraw the grid.
This is what live group summaries can achieve in a GXT grid. Similar to data aggregates, we can summarize a column's data, say as summation (total) or a count (now many), but more importantly, additions or changes to existing records are automatically reflected in whichever summaries ...