Re: gEDA-dev: proposed changes to drag on PCB

[David Rowe <david-at-NOSPAMrowetel_dot_com>]

Hello,

I have now pushed on a little further and am experimenting with dragging
components.  This short video:

http://www.rowetel.com/images/rubberband_demo_component.avi

shows a component being dragged and the tracks automatically rerouted to
preserve nice 45 degree angles.  

This is just a first pass that works with limited cases, I need to think
about how to extend it.  In this case it actually inserts a new track
segment during the drag, then adjusts the rubber-banded track to be 45
degrees.  However I don't want to keep adding new track segments for
every move.  

The rubber band list connected to the dragged object only extends "one
track deep", I need to to know two tracks away to adjust for 45 deg I
think.  Maybe I can build another rubber band list off the connected
track.

If I can work out how to extend this demo to general cases it could save
a lot of time in editing tracks.  I have seen high-end Windows packages
that do this, and even re-route to avoid collisions with other tracks
when u drag a component.

Editing tracks is where I seem to spend most of my time when working
with PCB hence my interest in improving this area.

Cheers,

David 




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