Re: Dia ext_attribute aggregate function question

[Lars Ræder Clausen <lars raeder dk>]

On Thu, 2008-10-23 at 10:26 -0200, Donato Azevedo wrote:
> Hi guys,
> 
> I am considering using dia for a project on my company but we need a
> feature that I could not find described on the docs. So I am asking
> here in case there is indeed a way to do it:
> 
> I want to create an extra attribute that is a function of the block's
> children, for instance, I have an attribute called Cost: if a block is
> a summary block (meaning it is composed of others) the value of Cost
> is the sum of the attribute Cost of its children.
> 
> 	_________________
> 	|Summary Block	|
> 	|		|
> 	| Cost=2	|
> 	-----------------
> 		/\
> 	       /  \
> 	      /    \
> 	_____v__  __v_____
> 	| Leaf |  | Leaf |
> 	|cost=1|  |cost=1|
> 	--------  --------
> 
> Is it possible with Dia? Or would it require a developing effort?

This would not be possible without developing a plugin, either in C or
in Python.

-Lars