Here is my code for that (Message is my model object, but it can be all you
want) :
Column<Message, Boolean> select = new Column<Message,
Boolean>(newCheckboxCell(
true)) {
@Override
public Boolean getValue(Message object)
{
return selectionModel.isSelected(object);
}
};
select.setFieldUpdater(new FieldUpdater<Message, Boolean>() {
public void update(int index, Message object, Boolean value)
{
// Called when the user clicks on a checkbox.
selectionModel.setSelected(object, value);
}
});
Header<Boolean> selectAllHeader = new Header<Boolean>(new CheckboxCell()) {
@Override
public Boolean getValue()
{
return selectionModel.getSelectedSet().size() == table.getRowCount();
}
};
selectAllHeader.setUpdater(new ValueUpdater<Boolean>() {
@Override
public void update(Boolean value)
{
List<Message> displayedItems = table.getDisplayedItems();
for (Message msg : displayedItems)
{
selectionModel.setSelected(msg, value);
}
}
});
table.addColumn(select, selectAllHeader);
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