Hi Wim,

I'm aware that the concept of an edit transction makes sense for the
graphical mode only where the user has some sort of "edit session".
But at least in that case I think there should be such a concept and the
API should provide  a possibility to hook into it.

By the way, I wonder whether both a programmer and the user actually
expects that  the value of the widget gets changed already before she
presses Enter or clicks the green hook.

Best,
  MP


Am Mo., 15. März 2021 um 11:28 Uhr schrieb Wim Jongman <
wim.jong...@gmail.com>:

> Hi Matthias,
>
> It depends on how you use the widget. CDateTime has many faces. When using
> the widget in its simplest form, there is no concept of Enter or OK. So it
> means that databinding has to be different based on the style of the
> widget.
>
> [image: image.png]
>
> Cheers,
>
> Wim
>
>
>
>
> On Mon, Mar 15, 2021 at 10:08 AM Matthias Paul Scholz <
> matthias.paul.sch...@gmail.com> wrote:
>
>> Hi all,
>>
>> For some years we have used the CDateTime widget in our RCP application
>> which works quite good. :)
>>
>> However, we ran in some troubles lately: to get notion about changes the
>> user made in the widget,  we use the databinding proposed by Henno
>> Vermeulen (see https://www.eclipse.org/forums/index.php/t/172877) that
>> binds our application to a selection event in the widget.
>>
>> There's an issue with that approach, however: it seems that such a
>> selection event is triggered always on each selection inside of the widget.
>> For instance, when the user cycles through the months in the calendar drop
>> down or selects another day, each time a separate selection event is fired.
>> This is inconvenient for us, since we need an event only when the user
>> explicitely commits her changes by selecting the ok button (or pressing
>> enter).
>>
>> This has become crucial for us lately since we have a new use case now
>> where a change in the widget triggers an expensive backend operation - and
>> it is a no go when this happens each time the user changes the month in the
>> calendar drop down ...
>>
>> Is there a possibility to listen for or to bind to ok/enter events on the
>> CDateTime widget only?
>>
>> Thanks,
>>   MP
>>
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