"replace" as the 2nd argument. This allows a simpler 'tag add
<command> <value>' than the existing awkward 'tag <command>
"[tag <command>]; <value>'. Using "add" also helps avoid
mistakes like one that was in the code for a long time which
overwrites one of the helper window callbacks. With this done,
added some additional callbacks to the "library manager" to
update when a new file is created by "select save" or "writeall".
Also added "Refresh" buttons to these windows, just in case.
Implemented a zoom function on the mouse scroll wheel when the
Control key is pressed. This is a stop-gap for a problem with
overriding button bindings that re-establish themselves when the
tool (box, wiring, etc.) changes. That needs to have a more
comprehensive solution (such as tool-specific bindings).
other commands like "Place Instance" and "Library Manager" do not
track cells in the internal database, and so are unable to place
a cell instance that does not have a corresponding file on disk
(e.g., a cell read from GDS or LEF).
Instead of a 6-character suffix generated randomly, the 6-character
suffix is generated by a hash algorithm from the device parameters.
If the cell parameters are changed, then the cell itself changes.
If the instance name was default (derived from the cell name) then
the instance name changes accordingly. The result is that there
cannot be two (auto-)generated cells with the same parameters but
with different cell names.
R. Timothy Edwards