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Date:	Thu, 19 Sep 2013 00:33:29 +0200
From:	Kai-Martin Knaak <kmk AT familieknaak DOT de>
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] Heavy Symbols
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"Stephen R. Besch" <sbesch AT buffalo DOT edu> schrieb am 18. September 2013:

> I should also mention that I find the easiest way to generate a new=20
> symbol from an old one is to insert the old one onto a schematic,
> select it and click on the Hierarchy...Down Symbol command from the
> top menu bar.

Alternatively, choose "Include as individual components" in the
drop-down list on the bottom of the insert symbol dialogue. Or open
the symbol file directly with=20
	File->Open...=20
This will allow you to edit the details of the symbol without
going down-symbol from a temporary schematic.


> Then use the File menu to save the symbol in your local
> library, probably with a new name. Type "en" followed by "et" (and
> accept the Translation entry box that results from the "et" command.

If I just want to change a symbol in the library rather than create a new
on, I avoid doing "et". The translation potentially breaks existing
circuits. Pins may not connect to the net lines.

This translation action is an awkward crutch.

Proposal:=20
Add a local reference point to the list of primitives known by gschem.
Currently, all coordinates in a symbol file refer to the lower left
corner of the canvas as an origin. If a reference point exists, all
coordinates in the file would be relative to this point.
This reference point could be treated as a handle for move and insert
actions.

Alternative proposal:
Allow for negative coordinates in gschem files. This would move 0/0 to
the middle of the canvas. It would act like the local reference of the
above proposal. In fact, gschem already treaty 0/0 like this. But
unlike now, the library author could move the symbol so that the origin
is located at an arbitrary point relative to the symbol graphics.

=20
> Now you can edit the symbol to you're hearts content. When done, hit=20
> "en" followed by "et" to re-hide hidden attributes and translate the=20
> symbol back to 0,  save a final time and you're almost done.

Make sure, you are doing save-as, not just save. Else, you may have
changed the original symbol in the library.


> Before you lose track of it, use the hierarchy UP command to return to=20
> the main schematic and delete the now unneeded "old" symbol.
>=20
> Note that gschem won't see the new symbol until after the next restart.

In recent versions of gschem there is a circular arrow to the right of
the search field in the symbol selection dialogue. Click on it and the
collection of symbols will be updated. No restart needed.

---<)kaimartin(>---
--=20
Kai-Martin Knaak

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