THIS.Parent.SetAll("Visible", .F., "olecontrol")
This will hide all ActiveX objects on the parent container. If you have a
hidden ActiveX control on the parent container the .T. will make it visible,
which may not be what you want.
Your safest will be to loop the Parent.Objects collection.
The class.init is not a good place to put code that relies on other objects.
VFP loads from the inside out. The other objects on the parent may not be
instantiated yet.
You could put a BINDEVENT(THISFORM, "Activate", THIS, "YourCustomMethod") in
the class init. This will insure the form has completed instantiating before
your search code fires. Be sure to have an UNBINDEVENT() call in your custom
class method, otherwise your code could fire multiple times.
If you do get a collection of objects from the parent to quickly reference;
Be sure to set the array to .NULL. or .F. during the destroy of your object.
I have experienced forms that would not go away due to dangling references
caused by this. Adding these objects to a VFP collection object could cause
the same dangling reference issues. The array is easier to clean up. To add
a custom property as an array end the name with [1] or a different count.
Tracy
-----Original Message-----
From: Joe Yoder
Sent: Thursday, January 08, 2009 5:18 PM
Ken,
I was hoping to have my class manage this without needing to add anything
else to the form. I thought there might be a function that returns what if
any control is located in a specific screen area. If that is not the case -
would the following approach be feasible?
Scan through all the objects on a form building an array of ActiveX
control names with their screen locations
Add a method to my class to make the appropriate Controls visible or
invisible based on whether the Top, Height, Left, and Width parameters
passed in indicate a collision.
I don't know how to scan the objects on a form but I assume there is a way.
Will it be critical to have the scan run after all the controls are
initialed or is the info accessible while my class.Init runs? If it needs
to run at form initialization is there provision in the system for that to
happen? Other gotchas?
Thanks - Joe
zoominternet.net
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