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DropList new When... action request [message #49372]

Wed, 31 January 2018 22:29

forlano
Messages: 1207
Registered: March 2006
Location: Italy

Senior Contributor

Hello,

I am working with a DropList. I am missing two useful When... callbacks:

WhenSelected : it should be activated after an item has been selected (WhenDrop is activated before the selection);

WhenChange : it should be activated only when the index of the drop ctrl is changed after a selection.

Does anybody has already coded them in some derived class?
Thanks,

Luigi

[Updated on: Wed, 31 January 2018 22:30]

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Re: DropList new When... action request [message #49409 is a reply to message #49372]

Tue, 06 February 2018 09:43

Oblivion
Messages: 1202
Registered: August 2007

Senior Contributor

Hello Luigi,

Did you try WhenAction? AFAIK, it is activated after the selection/change, and it can work for both WhenSelected and WhenChange. (You can simply set a conditional branch for change detection in it)

Best regards,
Oblivion

Github page: https://github.com/ismail-yilmaz
upp-components: https://github.com/ismail-yilmaz/upp-components
Bobcat the terminal emulator: https://github.com/ismail-yilmaz/Bobcat

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Re: DropList new When... action request [message #49416 is a reply to message #49409]

Tue, 06 February 2018 20:16

forlano
Messages: 1207
Registered: March 2006
Location: Italy

Senior Contributor

Oblivion wrote on Tue, 06 February 2018 09:43

Did you try WhenAction? AFAIK, it is activated after the selection/change, and it can work for both WhenSelected and WhenChange. (You can simply set a conditional branch for change detection in it)

Hi Oblivion,

thanks for the answer.
Yes, WhenAction is activated after the selection. So, half problem is solved Very Happy

.
Now I'll inquire how to get WhenChange.

Best regards,
Luigi

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Re: DropList new When... action request [message #49418 is a reply to message #49416]

Tue, 06 February 2018 20:49

Oblivion
Messages: 1202
Registered: August 2007

Senior Contributor

Hello Luigi,

In those cases, a simple course of action is to assign a unique/ordinary key (depending on the context) to the list elements (values), store the key of the active (or desired) item in a relevant variable and compare it to the next activated key everytime WhenAction is called.

Best regards.
Oblivion

Github page: https://github.com/ismail-yilmaz
upp-components: https://github.com/ismail-yilmaz/upp-components
Bobcat the terminal emulator: https://github.com/ismail-yilmaz/Bobcat

[Updated on: Tue, 06 February 2018 20:51]

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