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Eventbinding to a property
Message
From
04/02/2016 03:31:25
 
 
To
04/02/2016 03:06:16
Lutz Scheffler
Lutz Scheffler Software Ingenieurbüro
Dresden, Germany
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:
01630790
Views:
42
>>>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.
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