Is there a way to add a clickHandler to a Column in a cellTable in GWT ??
I do not see any option from the documentation for TextColumn.
My requirement goes this way - I have to display 5 columns of data in a cell table and one of the columns must have a onClick event to be fired. But I found no way to add a clickhandler to the textColumn.
if this was supposed to be done in regular html it would not take me 5 seconds to write the code -
Write your custom cell (here an example I wrote based on GWT ActionCell
) :
public abstract class ActionTextCell<C> extends AbstractCell<C> {
public static interface Delegate<T> {
void execute(T object);
}
private final Delegate<C> delegate;
public ActionTextCell(Delegate<C> delegate) {
super("click", "keydown");
this.delegate = delegate;
}
@Override
protected void onEnterKeyDown(Context context, Element parent, C value, NativeEvent event,
ValueUpdater<C> valueUpdater) {
delegate.execute(value);
}
@Override
public void onBrowserEvent(Context context, Element parent, C value, NativeEvent event, ValueUpdater<C> valueUpdater) {
super.onBrowserEvent(context, parent, value, event, valueUpdater);
if ("click".equals(event.getType())) {
onEnterKeyDown(context, parent, value, event, valueUpdater);
}
}
@Override
public void render(Context context, C value, SafeHtmlBuilder sb) {
sb.append(new SafeHtmlBuilder().appendHtmlConstant("<span>" + render(value) + "</span>")
.toSafeHtml());
}
public abstract String render(C value);
}
And use it within an IndentityColumn
which you add to your CellTable
:
final ActionTextCell<MyClass> cell = new ActionTextCell<MyClass>(new ActionTextCell.Delegate<MyClass>() {
@Override
public void execute(MyClass c) {
// do something with c
}
}) {
@Override
public String render(MyClass c) {
// return a string representation of c
}
};
final IdentityColumn<MyClass> column = new IdentityColumn<MyClass>(cell);