Hi Geraint,
(This is also CC'd to bond-graph developers and dia-developers that may
want to look at gap code for dia-0.90, instead of messing with the dia
CVS patch I sent). Sorry for the massive posting.
Did you compile your own version of Dia? I am sending you a bond-graph
as I envisage it. The problem is that you will need to patch version
0.9 of dia in order to view it. Tell me if this is a problem. Simply
download version 0.9 from source, replace objects/standard/line.c with
my version, and replace objects/flowchart/box.c with my version (make
sure you don't replace objects/standard/box.c by accident!!!). Then, do
./configure --prefix=/tmp/diabond && make && make install
and then run
/tmp/diabond/bin/dia bond_graph.dia.gz
I hope this will compile without any trouble for you. If you are
running a recent version of Linux with relatively complete gnome
development libraries, it should.
The version that I sent has a minor bug with some parasites appearing on
the screen if you draw short lines. It's not near as clean as the
bug-free (I hope) CVS-based code I committed to the dia team. I am just
too lazy to fix the 0.9 version included here.
I had a different idea about labeling: I labeled the transmission with
simple text labels that are attached to the same anchors as the
respective bonds. We could maybe improve the text label so that it can
be moved around relative to its anchor. The advantage to using this
kind of text label (instead of the separate [a],[b],[c] boxes you sent
me) is that the labels move around with the 'transmission' as they should.
Flowchart - Box has one minor problem: its upper left corner snaps to
the grid. It would be better if the center point snapped to the grid,
since the center point is the anchor point which determines arrow
placement. We could create a new 'box' that snaps to center, and only
contains one center connection point, in a bond-graph shapes library.
Hope you are able to try this out. Do you see any major dia weaknesses,
besides the dia arrow code?
Dave.
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line.c.gz
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box.c.gz
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bond_graph.dia.gz
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