Hi Edgar,
thanks for your answer :-) I will have to describe it better.
Yes my morph and its submorphs disappear correctly when I close/delete it.
My problem is, that the submorphs need to do some clean up (unregister as dependents from the domain objects) when they disapear from the world . I tried to overwrite delete in my submorphs, but delete was not called on my submorphs when i closed/deleted my GUI.
Here is a short sketch of my classes:
I have a class Device (with attributes name, ip-Adress, port) which holds subdevices (objects of class Subdevice with attributes like name, description, state..)
To view and edit Devices with their subdevices i made a DeviceMorph (for viewing/editing the "primitive" attributes of Device) and a SubdeviceMorph (for the SubDevices). Devicemorphs hold Subdevicemorphs as submorphs. Subdevicemorphs register themself as dependent on an Subdevice object so they get infomed when the Subdevice changes it's state (just the squeak standard change notification mechanics). This works fine. I can open several DeviceMorphs for the same Device and a change on the device or its subdevices via one of the openDevice Morphs ist instantly displayed on all open DeviceMorphs for that device.
When i close one of the DeviceMorphs observing my Device i need to unregister its SubDeviceMorphs from the SubDivices they have observed, because they are no longer visible and do not need the change notifications of their SubDevice anymore and because the reference from my SubDevice to my (now unvisible) SubDeviceMorph prevents the SubDeviceMorph from being garbage collected.
Btw. I copied this design from the morphic counter example on http://wiki.squeak.org/squeak/795. The difference between the counter example an my problem is, that my domain objects live more independent of the GUI.
I have seen that morphs can have a model, but i have no idea how to use it.
Thanks again,
Dietmar
Edgar schrieb:
El 6/5/07 4:24 AM, "Dietmar Schielke" Dietmar.Schielke@data-experts.de escribió:
Hi Squeakers,
i made a simple morph with submorphs. the submorphs are views for some
domain
objects and are dependents of them ( domainobj addDependent: mysubmorph
).
Every thing works fine :-) but i can't figure out, how to remove my submorphs from the dependents
list of
my domain object, when I close/delete my morphic gui. It seems Morph delete does not call delete recursively on its
submorphs. Is
there an other way submorphs get informed when they are removed from
the
screen?
Thanks in advance,
Dietmar
Could send sample ? Morph could be viewed as "containers" of all submorphs inside . As example any Tools is a SystemWindow and a model for it. Select a Browser as example and you could see have many submorphs. Deleting the window , delete all submorphs inside.
Or I misunderstanding you ?
Edgar