Everything you said sounds correct.
Here is a code snippet that should work:
ButtonCell cell = newButtonCell();
// Create a column using the ButtonCell.
Column<RowObject, String> column = new Column<RowObject, String>(cell) {
public String getValue(RowObject object) {
return "Show " + object.getListSize(); // Get a String from the object.
}
};
// Set a fieldupdater.
column.setFieldUpdater(new FieldUpdater<RowObject, String>() {
public void update(int index, RowObject object, String value) {
Window.alert("You clicked " + object.toString());
}
});
myCellTable.addColumn(column);
Thanks,
John LaBanca
[email protected]
On Wed, Dec 1, 2010 at 3:33 PM, Greg Dougherty
<[email protected]>wrote:
> Hi John,
>
> I'm pretty sure I'm not following you. Here's my understanding:
>
> I currently have an ActionCell in an IdentityColumn. You're saying I
> can replace the ActionCell with a ButtonCell.
> I need to have a class implement FieldUpdater<T, C>, and pass that to
> the IdentityColumn that holds my ButtonCell. T is the class of my row
> object. C is ???
> So you're saying that clicking on the button will fire a ValueChange
> call that will cause my FieldUpdater to have update (int, T, C)
> called, which can then use the T parameter to fire off my command?
>
> Other problem: ButtonCell implements Cell<String>. But I need to pass
> it my row object, so that it can change its title based on non-string
> information in the row. (i.e. I want one button that will say "Show
> 'x'", where x is the number of items in a list in the row object, or
> to disable the button and put "Nothing" as the title if the list is
> empty. I don't see how I can do that with a ButtonCell. Am I missing
> something?
>
> Thanks,
>
> Greg
>
> On Dec 1, 1:43 pm, John LaBanca <[email protected]> wrote:
> > ButtonCell triggers a ValueChangeHandler when it is clicked. Add a
> > FieldUpdater to your Column and FieldUpdater#update() will be called.
> >
> > Thanks,
> > John LaBanca
> > [email protected]
> >
> > On Wed, Dec 1, 2010 at 2:29 PM, Greg Dougherty
> > <[email protected]>wrote:
> >
> > > What, then, do I have to implement so that the button will fire an
> > > action when it's clicked. Does this require me to extend ButtonCell?
> >
> > > Thanks,
> > > Greg
> >
> > > On Dec 1, 12:48 pm, John LaBanca <[email protected]> wrote:
> > > > You can use a ButtonCell instead. ButtonCell takes a String to
> display
> > > in
> > > > the Button, but otherwise it looks just like ActionCell.
> >
> > > > Thanks,
> > > > John LaBanca
> > > > [email protected]
> >
> > > > On Wed, Dec 1, 2010 at 12:30 PM, Greg Dougherty
> > > > <[email protected]>wrote:
> >
> > > > > Is it possible to change teh title of an ActionCell based on the
> > > > > contents of the row it's in?
> >
> > > > > It looks like the answer is no, but I figured I'd check here before
> I
> > > > > gave up.
> >
> > > > > Greg
> >
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