Table component

Vaadin 6 / 7 / 8 Framework UI
1

Hi all!

Code:


Table table = new Table();
table.setSelectable(true);
...
addComponent(table);
table.select(new Integer(1));

Works correctly. After opening the window, selects the first row in the table

But code:


table.addListener(new ItemSetChangeListener() {

            private static final long serialVersionUID = -9008670032927481120L;

            @Override
            public void containerItemSetChange(ItemSetChangeEvent event) {
                if (event.getContainer().size() == 0) {
                    selectedItem = 0;
                    updateButtonLayoutUp.recordsExist(false);
                } else {
                    updateButtonLayoutUp.recordsExist(true);
                }
                table.select(new Integer(1));
            }
        });

Not selects first row in the table, after refresh data container.
Why is this happening?

2

Table.select() takes an item ID as a parameter, not an index. To select the first item try something like this:

table.select(table.getItemIds().iterator().next());
3

Hello Henri!

Unfortunately your code does not select the first row 8o

4

Any more ideas?

5

It depends whether you replace the container in the table, or add items to it. The ItemSetChangeEvent is only fired when items are added to or removed from the container.

6

This is understandable. Through ItemSetChangeEvent I know that the container has been updated. How do I choose the first entry in the table?

7

You might have some other problems in your code. This example seemed to work fine:

final Table table = new Table();
table.addContainerProperty("foo", String.class, null);
table.setSelectable(true);

table.addListener(new Container.ItemSetChangeListener() {

     public void containerItemSetChange(ItemSetChangeEvent event)
          table.select(table.firstItemId());
     }
});

Button addItemButton = new Button("Add item");
addItemButton.addListener(new Button.ClickListener() {

     public void buttonClick(ClickEvent event) {
          table.addItem(Math.random()).getItemProperty("foo").setValue("bar");
     }
});
8

Risto, thanks, that’s the “key” that solves my problem :grin: