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Memory objects saved into cursors
Message
From
18/02/2019 12:34:19
 
 
To
18/02/2019 12:22:02
Lutz Scheffler
Lutz Scheffler Software Ingenieurbüro
Dresden, Germany
General information
Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Miscellaneous
Thread ID:
01666501
Message ID:
01666505
Views:
49
>>Is there a way to save an object reference into a cursor? Something like this:
>>
>>
lo = CREATEOBJECT("Form")
>>CREATE CURSOR c_example (oData g)
>>INSERT INTO c_example (oData) VALUES(lo)
>>
>>SCAN
>>    c_examples.oData.BackColor = RGB(255,255,0)
>>ENDSCAN
>>
>>
>>
>>The only way I know how to do it is in some way like this when going through a table:
>>
lo = CREATEOBJECT("Form")
>>CREATE CURSOR c_example (cDataObj c(20))
>>
>>lcName = SYS(2015)
>>PUBLIC &lcName
>>&lcName = lo
>>INSERT INTO c_example (cDataObj) VALUES(lcName)
>>
>>SCAN
>>    lcObj = ALLTRIM(cDataObj)
>>    &lcObj..BackColor = RGB(255,255,0)
>>ENDSCAN
>>
>>
>>Is there a way to do it through objects?
>
>Basically yes, but it's several hundred lines of code in some class.
>The idea is to use AMEMBERS to parse the object, TRASNSFORM / PADL to create text that could be used as VFP prg to create the parameters.
>Tricky is child objects, collections and circular references.

I'm looking for a way to reference memory objects that are live in memory, instantiated, viable, able to be called, but to reference them later, not now, meaning in a few minutes while they are still live and viable.

In C/C++ I would store a reference to the pointer in a memory structure, or save the memory address to a disk file and then reconstitute the pointer by decoding the address. I don't know of a way to do this in VFP, and I'm needing it. :-)

So far the PUBLIC SYS(2015) variable form is working, but it's clunky as it creates lots of PUBLIC variables.

>The product of it is a text block that could be run with EXECSCRIPT
>
>I use it to store form settings of any sort.
>
>See if you can create it. Otherwise I would need to export in a sort of VFPX project.
>
>Lutz
>
>Update
>And I run into problems with decimal lenght, SET POINT, type of property with .NULL. value and so on.
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