Description
ListGrid displays a list of objects in a grid, where each row represents one object and each cell in the row represents one property.
Periodical updating ListGrid is possible in the following ways:
- Use invalidateCache method. It update the data will show a loading message and will disrupt the existing view.
- Transparent update by DataSource using fetchData method. It update the data will not show a loading message and will not disrupt the existing view.
Transparent update
For transparent loading the data should be used fetchData method.
Update by DataSource
private void updateAll() {
DataSource dataSource = listGrid.getDataSource();
Criteria criteria = listGrid.getCriteria();
dataSource.fetchData(criteria, createUpdateAllCallback());
}
Handle server response
private DSCallback createUpdateCallback() {
return new DSCallback() {
@Override
public void execute(DSResponse response, Object rawData, DSRequest request) {
DataSource dataSource = listGrid.getDataSource();
ResultSet resultSet = new ResultSet(dataSource);
resultSet.setInitialLength(response.getTotalRows());
resultSet.setInitialData(response.getData());
listGrid.setData(resultSet);
}
};
}
Transparent update range
For transparent loading the data range should be used DSRequest. It allows you to specify a range of data to load.
Update by DataSource
private void updateRange() {
DataSource dataSource = listGrid.getDataSource();
Criteria criteria = listGrid.getCriteria();
Integer[] visibleRows = listGrid.getVisibleRows();
Integer startRow = 0;
Integer endRow = (visibleRows[1] + listGrid.getResultSet().getResultSize());
DSRequest request = new DSRequest();
request.setStartRow(startRow);
request.setEndRow(endRow);
dataSource.fetchData(criteria, createUpdateCallback(), request);
}
Attachments
No files shared here yet.
