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Re: [nebula-dev] How to receive ok event only in CDateTime widget?
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Hi Wim,
Thanks for the quick answer.
Unfortunately, the simple version is no option for us, since our customers are used to the graphical version for years now already.
A look in the CDateTime sources revealed to me that there isn't a real concept of an edit transaction in the widget: the value of the widget gets changed directly on each selection in the picker or input by the user.
There is no model in the widget nor does the green hook perform any "commit" of the value to to such a model (as I had expected).
As a result, there is not possibility to hook into that point of lifecycle with the current state of the CDateTime API. :(
This makes it pretty much unusable for us presently.
I case you agree with me here, I'd propose to refactor the widget with a decent model-view approach and some hook in the API that allows for registering for some sort of edit transaction end (I were willing to adopt that task).
What do you think?
Best,
MP
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.
Cheers,
Wim
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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