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Eventbinding to a property
Message
From
04/02/2016 03:33:10
Lutz Scheffler
Lutz Scheffler Software Ingenieurbüro
Dresden, Germany
 
 
To
04/02/2016 03:31:25
General information
Forum:
Visual FoxPro
Category:
Object Oriented Programming
Environment versions
Visual FoxPro:
VFP 9 SP2
OS:
Windows 8.1
Network:
SAMBA Server
Database:
Visual FoxPro
Application:
Desktop
Miscellaneous
Thread ID:
01630781
Message ID:
01630791
Views:
43
>>>>Hi,
>>>>
>>>>I do not understand how to
BINDEVENT
to a property so that the delegate gets the value I set to the property.
>>>>Any ideas?
>>>>
>>>>Lutz
>>>
>>>If you BindEvent to a property, the delegate event will trigger when the property changes. The delegate event can be an assign or refresh method of the delegate, something like "this.value=source.value"
>>
>>Good morning Tore.
>>
>>It just triggers. That's what I see.
>>
>>My problem is, that I do not know source.value IOW, I do not know which source property will bind to the delegate. I just need the value.
>>
>>I know I can AEVENT and EVALUATE to get the value. But this would fire over and over. To much.
>>My idea (and that was what I understand from the help with the implizit assign and so on) that I would recieve the value set to the source as a parameter.
>>
>>To bound to an Assign will not help to - it's a bunch of properties. And I do not need the extra code if I'm not bound.
>>
>>Seems to be a design flaw.
>>I will solve it otherwise. If I need to EVALUATE something I can do it on the place where I need the value, but only in this very moment. Or call a hook method ... Let's throw the dice ...
>>
>>Lutz
>
>It's a long time since I did this myself, and I have forgotten in which application I needed it. So unfortunately I can't provide any sample code. I wish I could be more helpful, but I am in the middle of some programming which need me being focused on my own problems.

No problem. Thank you anyway. I guess it will not work as I thought - I found an example in my own old code that circumvents the problem ....
Words are given to man to enable him to conceal his true feelings.
Charles Maurice de Talleyrand-Périgord

Weeks of programming can save you hours of planning.

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