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Combo selection by programm and addSelectionListener [message #457697]

Sat, 02 July 2005 17:20

Eclipse User

Originally posted by: prokopiev.stc.donpac.ru

Hi,

I have the code:

combo.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
// do something
}
});
if (combo.getItemCount() > 0)
combo.select(0);

If I select any item by hand in running programm, method widgetSelected
is executed. But combo.select(0) is not call widgetSelected.

What's wrong?

--
Thanks,
Eugene Prokopiev

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Re: Combo selection by programm and addSelectionListener [message #457716 is a reply to message #457697]

Sun, 03 July 2005 16:24

Boris Munivrana

Messages: 23
Registered: July 2009

Junior Member

Hi,

you should use <<if (combo.getItemCount() > 0)
combo.select(0);>> WITHIN <<public void widgetSelected(SelectionEvent e)>>
(a.k.a. WITHIN your SelectionAdapter),
otherwise it wont't work during runtime, only the one time you are
creating your enclosing class.

Regards,

Boris

Eugene Prokopiev wrote:

> Hi,

> I have the code:

> combo.addSelectionListener(new SelectionAdapter() {
> public void widgetSelected(SelectionEvent e) {
> // do something
> }
> });
> if (combo.getItemCount() > 0)
> combo.select(0);

> If I select any item by hand in running programm, method widgetSelected
> is executed. But combo.select(0) is not call widgetSelected.

> What's wrong?

> --
> Thanks,
> Eugene Prokopiev

Report message to a moderator

Re: Combo selection by programm and addSelectionListener [message #457824 is a reply to message #457716]

Tue, 05 July 2005 05:12

Eclipse User

Originally posted by: prokopiev.stc.donpac.ru

> you should use <<if (combo.getItemCount() > 0)
> combo.select(0);>> WITHIN <<public void widgetSelected(SelectionEvent
> e)>> (a.k.a. WITHIN your SelectionAdapter),
> otherwise it wont't work during runtime, only the one time you are
> creating your enclosing class.

I don't need combo.select(0) in SelectionAdapter, I need to do it in
some other places. Is there no way to select item by program and execute
widgetSelected?

Now I use:

jdbcConnections.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
setupConnection(jdbcConnections.getSelectionIndex());
}
));
if (jdbcConnections.getItemCount() > 0) {
jdbcConnections.select(0);
setupConnection(0);
}

But it's ugly code.

--
Thanks,
Eugene Prokopiev

Report message to a moderator

Re: Combo selection by programm and addSelectionListener [message #457843 is a reply to message #457824]

Tue, 05 July 2005 19:41

Steve Northover

Messages: 1636
Registered: July 2009

Senior Member

When a selection is set by the programmer, widgetSelected() is not sent.
This is by design. You can use notifyListeners() to send the event yourself
or place the widgetSelected() code in another method and call it after the
select() and from widgetSelected().

"Eugene Prokopiev" <prokopiev@stc.donpac.ru> wrote in message
news:dad4t9$7v8$1@news.eclipse.org...
> > you should use <<if (combo.getItemCount() > 0)
> > combo.select(0);>> WITHIN <<public void widgetSelected(SelectionEvent
> > e)>> (a.k.a. WITHIN your SelectionAdapter),
> > otherwise it wont't work during runtime, only the one time you are
> > creating your enclosing class.
>
> I don't need combo.select(0) in SelectionAdapter, I need to do it in
> some other places. Is there no way to select item by program and execute
> widgetSelected?
>
> Now I use:
>
> jdbcConnections.addSelectionListener(new SelectionAdapter() {
> public void widgetSelected(SelectionEvent e) {
> setupConnection(jdbcConnections.getSelectionIndex());
> }
> ));
> if (jdbcConnections.getItemCount() > 0) {
> jdbcConnections.select(0);
> setupConnection(0);
> }
>
> But it's ugly code.
>
> --
> Thanks,
> Eugene Prokopiev

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