Re: Changing/Setting end_arrow from python Again

[Philip Cavaco <Philip Cavaco ki se>]

Thank you for that addition.

Philip

----- Original Message -----
From: Hans Breuer <hans breuer org>
Date: Sunday, March 8, 2009 10:15 pm
Subject: Re: Changing/Setting end_arrow from python Again
To: discussions about usage and development of dia <dia-list gnome org>

> At 06.03.2009 09:50, Philip Cavaco wrote:
> > Could the arrow be set similarly to colour. 
> There are two ways to set colors: either by name or by tuple/array 
> with 3 
> data points. Both describe the complete color and not just a part 
> of it.
> 
> > I mean that just the type
> > can be specified as a number and the default settings for width and
> > length are used, 
> > 
> > o.properties["start_arrow"] = 17
> > 
> This definition would be incomplete, and there is no precedence in 
> the API 
> (at least that I know of).
> > or a triple as you suggested. 
> Yes, but exclusive.
> 
> > This way we wouldn't have to add the named enums. 
> The concept of setting an int by a named constant "enum" is 
> completely 
> orthogonal, as in:
> 
>   o.properties["start_arrow"] = (dia.ARROW_BLANKED_BOX, .5, .5)
> 
> versus:
> 
>   o.properties["start_arrow"] = (17, .5, .5)
> 
> 
> > We would need a way to find the default width and length values
> > for a given type though. I am not sure where this information is.
> > 
> Actually looking into the code should help. See: lib/arrows.h
> 
> But now it is not any longer necessary cause I just commited:
> 
> 2009-03-08  Hans Breuer  <hans breuer org>
> 
> 	* plug-ins/python/pydia-property.c : implement PyDia_set_Arrow() to
> 	allow modification of line ends from python scripts, like:
>        	o.properties["start_arrow"] = (17, .5, .5)
> 
> -------- Hans "at" Breuer "dot" Org -----------
> Tell me what you need, and I'll tell you how to
> get along without it.                -- Dilbert
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