|
|
| Re: Puzzling over inherited objects [message #84570 is a reply to message #84569] |
Tue, 04 June 2013 15:10  |
Helder Marchetto
Messages: 520
Registered: November 2011
|
Senior Member |
|
|
On Tuesday, June 4, 2013 11:51:47 PM UTC+2, Helder wrote:
> Hi,
>
> I'm quite new to using objects and wanted to do a bit more with what I have been doing until now (not much anyway...). So here is the deal.
>
> I want to create an object that incorporates (inherits?) the a typical object such as IDLanROI. So that the structure definition would look like this something like this:
>
>
>
> class = {MyRoiObj, INHERITS IDLanROI, IDNr:0L}
>
>
>
> where I simply added an ID to each IDLanROI. I still want to have all the functionality of the methods associated with IDLanROI.
>
>
>
> The problem is: how would I assign the object (properties of) IDLanROI to my new object in the init function? I guess (and I'm quite sure) that something like
>
> self = obj_new('IDLanROI')
>
> or
>
> void = obj_new('IDLanROI')
>
> struct_assign, self, void
>
>
>
> will not work. So the only solution I see at the moment is to create the structure as:
>
>
>
> class = {MyRoiObj, IDLanROI_ref:OBJ_NEW(), IDNr:0L}
>
>
>
> And then in the init or whereelse, assign the object as:
>
> self.IDLanROI_ref = obj_new('IDLanROI')
>
>
>
> So here is the question... is there a better way to do this? Ideally objects are made with inheritance... I simply can't find a way to use that in my case.
>
>
>
> Any suggestions?
>
>
>
> Thanks,
>
> Helder
Ok... I did my homework and found the answer in "IDL Programming Techniques". I need to call in my init method the init method of the superclass object.
ok = self->IDLanROI::init()
This did it.
I also checked, and I'm quite happy of that, I can use DRAW_ROI on the subclass object.
Thanks David for giving me the answer (in a book...).
Cheers,
Helder
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
