Repaint Table column

Support
#1

Hi, is it possible to repaint just one cell or column of a Table? (CUBA 7.2)

I ask because I have an attribute that is calculated from two other attributes from the entity. The table has editable columns and when I exit a TextField component (editable cell in the table) I catch the change via a ValueChangeListener and update the aforementioned attribute, but when I do so, it won’t be displayed in the table.
Now I can do a table.repaint() - this will display my newly calculated value, but will lose the focus on the table. But the focus is still required, because I want the user to be able to fill in the next column painlessly (without clicking in the required field again).

#3

Hello,

unfortunately, the table cannot repaint only one cell or column. We have known issue with editable columns and focus in the table: Editable Table - Wrong focus FW 7+. I can suggest setting column generator to all non-editable columns:

@Subscribe
public void onInit(InitEvent event) {
    for (Table.Column<Customer> column : customersTable.getColumns()) {
        if (!column.isEditable()) {
            column.setColumnGenerator(customer -> {
                Object value = customer.getValueEx(column.getIdString());
                return new Table.PlainTextCell(metadataTools.format(value));
            });
        }
    }
}

And also set the generator to the column which should have calculated value and bind it with value source:

@Install(to = "customersTable.name", subject = "columnGenerator")
private Component customersTableNameColumnGenerator(Customer customer) {
    Label<String> label = uiComponents.create(Label.NAME);
    label.setValueSource(new ContainerValueSource<>(
            customersTable.getInstanceContainer(customer), "name"));
    return label;
}

So in this case, you do not have to invoke table.repaint() as label value will be changed after an entity’s property changed. See attached demo project: demo.zip (86.6 KB)

1 Like
#5

@Pinyazhin Nice, thanks, that worked. :slight_smile: