Getting datatype handle from DTA_Sync message on IDCMP_IDCMPUPDATE

[Thomas]

How do I know to which datatype a given DTA_Sync corresponds to ? I tried to look for DTA_Handle tag in the taglist on IAdress but it's not included ...

GA_ID should be included. If you add GA_ID with a unique ID to the NewDTObject call, you should be able to identify the object by that ID when receiving an IDCMP_IDCMPUPDATE message.

Bye,
Thomas

[Thomas]

So I'd have to wonder through the window's gadget list till I find a particular ID...

You could hold the object pointers in an array and use the ID as an index to the array.

Code: [Select]


obj_ptrs[id] = NewDTObject (...,GAD_ID,id,...);
id ++;


Even then I'd still have to get the datatype handle from the gadget structure...

The gadget structure *is* the datatype handle.

Bye,
Thomas

[Thomas]

I said that cause the datatypes handle is declared as an APTR in the docs so I thought it was supposed to be considered a black box

It *is* considered a black box. But if you think about how BOOPSI works and know that datatpyes are subclasses of gadget class, then there is no other way than that the datatype object pointer points to a struct Gadget.

The array method is better (more "legal"), though.

Bye,
Thomas