| use of 'obj_new' within another object definition [message #32961] |
Mon, 18 November 2002 13:48 |
wisehart
Messages: 2
Registered: November 2002
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Junior Member |
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Hi,
I am experiencing a problem in IDL 5.4.
I create an object called 'my_object', and define it in a file called
'my_object__define.pro'
I do the same thing with 'other_object' , and
'other_object__define.pro'.
Both of these objects compile and i can create variables with them.
They both have 'init' functions that do basic initilization stuff.
I know that the 'init' functions are getting called because I can
put...
print,'i am here ...'
...statements in the init functions, and I will see the output when
i initialize an object of that type.
...
Now, my problem is that if I want 'my_object' to have an instance of
'other_object' as a member object, the init function( of
'other_object')
doesn't get called.
To eleborate...(snipping irrelevant stuff)
;----------------------------------
;my_object__define.pro
pro my_object__define
foo: obj_new('other_object')
end ; my_object
;------------------------------
;other_object__define.pro
function other_object::init
print, ' i am here!'
return, 1
end ; init
pro other_object__define
;object definition stuff here
end ; other_object
;----------------------------
When type ' x = obj_new('other_object') ' on the
command line, I see the ' i am here!'.
When type ' y = obj_new('my_object') ' on the
command line, I DON"T see the ' i am here!'.
Why is this?
I don't get any errors otherwise, and
according to the documentation on 'obj_new'
it seems it should call the 'init' function
in BOTH circumstances.
Any ideas greatly appreciated,
Paul Wisehart
wisehart@runbox.com
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