Re: Changing/Setting end_arrow from python Again

[Hans Breuer <hans breuer 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