Modeling: User's Guide

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5.3 Miscellaneous developer's hints

How to dynamically identify a nested EditingContext?

Simply invoke parentObjectStore() on it ; if the result is another EditingContext, it is nested. Otherwise it is a regular EditingContext.

>>> from Modeling.EditingContext import EditingContext
>>> parent_ec=EditingContext()
>>> ec=EditingContext(parent_ec)
>>> ec.parentObjectStore().__class__==EditingContext
1
>>> parent_ec.parentObjectStore().__class__==EditingContext
0

How to determine whether a given EditingContext is a (grand-)child of an other one?

Use the method isaChildOf, which examines the parent/children hierarchy and answers appropriately:

>>> from Modeling.EditingContext import EditingContext
>>> grand_parent_ec=EditingContext()
>>> parent_ec=EditingContext(grand_parent_ec)
>>> ec=EditingContext(parent_ec)
>>> ec.isaChildOf(parent_ec)
1
>>> ec.isaChildOf(grand_parent_ec)
1

Is it possible to get the children of a given EditingContext?

No.

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Modeling: User's Guide

Previous: 5.2 Declaring and using Up: 5. Nested EditingContexts Next: 5.4 Limitations with multiple

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Release 0.9, documentation updated on March 4, 2006.

Comments are welcome: Sebastien Bigaret / Modeling Home Page
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