Re: routing tables to dia network map

[Hans Breuer <Hans Breuer org>]

At 22:08 07.03.04, Philippe Biondi wrote:

> On Sun, 7 Mar 2004, W. Borgert wrote:

[...]

> > > - Dia python plugin / simple XML generator / no parser at all / other ?
> >
> > I think, a stand-alone Python programme would be the best
> > solution, using either the standard Python XML library or
> > the libxml2 module for Python.  There is no much gain in
> > having it a Dia plugin, right?

I really doubt this : if one can live with the huge Dia dependency one gets 
the ability to place object dependent on their size - computed by Dia 
itself. How can any external tool deliver this ?


> I don't know, that's why I ask the question. The best approach for me,
> would be to be able to import some dia module that will handle all the
> xml stuff for me. My dream would be sth that looks like :
>
> import dia
>
> mygraph = dia.A_new_graph()
>
> router1 = dia.A_new_icon("Cisco router")
> router2 = dia.A_new_icon("Cisco router")
> net1 = dia.A_new_icon("Cloud")
> dia.mygraph.add(router1,(0,0))
> dia.mygraph.add(net1,(20,0))
> dia.mygraph.add(router1,(40,0))
> dia.mygraph.connect(router1, net1)
> dia.mygraph.connect(router2, net1)
> dia.mygraph.writefile("mymap.dia")

Maybe something similar like the dirty script below will do the trick.
Note: I'm not including al it's dependencies (they are just working on 
win32 anyway, _but_ what it does is similar to what I think you want to do. 
It's based on pydia which is included in the Dia package for a long time 
now [I've written this plug-in almost two years ago ;-]

Creates a diagram with connected objects (here UML Packackes, which 
reperenst the dependency tree of a given component) :

#!/usr/bin/env python

import sys

import gtk
import dia

# Another HACK to get my tools
sys.path.insert(0, r'c:\util\tool')

def dlg_destroy (w):
        w.destroy ()

def dia_generate_dia_cb (data, flags) :

        import os

        os.chdir(r'd:\graph\dia\bin')
        sModule = 'dia.exe'

        import deps2dia
        deps = {}
        deps2dia.GetDeps (sModule, deps)
        deps2dia.RemoveWellKnown (deps)

        maxcnt = 0
        bycnt = {}
        for s in deps.keys () :
                a = deps[s]
                n = len(a)
                if maxcnt < n :
                        maxcnt = n
                #sys.stderr.write(s + " ")
                if bycnt.has_key (n) :
                        bycnt[n].append(s)
                else :
                        bycnt[n] = [s]

        dt = dia.get_object_type("UML - LargePackage")
        layer = data.layers[0]
        # create objects sorted by number of deps
        objs = {}
        x = 0
        y = 0
        yofs = len(bycnt.keys())
        for i in range(0, maxcnt +1) :
                if bycnt.has_key(i) :
                        x = 0
                        for s in bycnt[i] :
                                o, h1, h2 = dt.create(x * 15.0, yofs - y * 
10.0)
                                o.properties["name"] = s
                                layer.add_object(o)
                                objs[s] = o
                                x += 1
                        y += 1

        # add dependencies
        dt = dia.get_object_type("UML - Dependency")
        for s in objs.keys() :
                o1 = objs[s]
                for sd in deps[s] :
                        o2 = objs[sd]
                        opos = o1.properties['obj_pos'].value
                        x = opos.x + o1.properties['elem_width'].value / 2
                        y = opos.y + o1.properties['elem_height'].value
                        o, h1, h2 = dt.create(x, y)
                        layer.add_object(o)
                        # connect it
                        h1.connect (o1.connections[6])
                        h2.connect (o2.connections[1])

        layer.update_extents()
        dia.active_display().add_update_all()

dia.register_callback ("Dia Group Properties",
                       "<Display>/Debug/Dependencies",
                       dia_generate_dia_cb)


> and get this diagram :
>
>  [Cisco icon]--[cloud icon]--[Cisco icon]
>
>
> Does this exists ?
> I know there is a dia module, but it is not installed in the python library.
> I imagine it is only for the python plugin.
It is, but obviously Dia Python plug-ins can call external tools.


> Is it ok to use it in external
> programs ? And how to use it ?

The only way to use pydia in fact is for a Python scripts running embedded 
in Dia. There are some more or less simple examples in the distribution.

        Hans
-------- Hans "at" Breuer "dot" Org -----------
Tell me what you need, and I'll tell you how to
get along without it.                -- Dilbert