How to automatically check the checkboxes in the gridview when displaying? - gwt

Question

I'm using GXT 3 to build a GridView that will display "incidents".
What I want to do is that when it renders it, I want some checkboxes to be checked, others to empty, according to the boolean in the database.
Below you have my code:
CheckBoxSelectionModel<IncidentDto> isIncidentCM = new CheckBoxSelectionModel<IncidentDto>(incidentProperties.incident());
allColumns.add(isIncidentCM.getColumn());
ColumnModel<IncidentDto> columnModel = new ColumnModel<IncidentDto>(allColumns);
final Grid<IncidentDto> grid = new Grid<IncidentDto>(store, columnModel);
grid.setSelectionModel(isIncidentCM);
add(grid);
And the IncidentProperties value provider:
IdentityValueProvider<IncidentDto> incident();

Answer 1

I'm not sure if you can bind the selection value to a boolean property, but you could add a listener to the Grid to update the checkboxes based on the boolean condition.
grid.addBeforeShowHandler(BeforeShowEvent event) {
#Override
public void onBeforeShow(BeforeShowEvent event) {
List<IncidentDto> itemsToSelect = new ArrayList<IncidentDto>();
for (IncidentDto incident : store.getAll()) {
if (incident.getBooleanProperty()) { //whatever your property is called
itemsToSelect.add(incident);
}
}
isIncidentCM.setSelection(itemsToSelect);
}
}
There may be other implications in using a BeforeShowEvent depending on how/when you populate your store, render the grid, etc. but assuming your store is fully loaded and the property available from your store objects I believe this should accomplish your goal.