Also fixes a bug where nets wouldn't get changed because the
pads weren't changed and so the pad nets would propagate and
wipe out the changed nets on the tracks.
Also includes warning dialogs that pad nets will be changed if the
track nets are.
Fixes: lp:1779854
* https://bugs.launchpad.net/kicad/+bug/1779854
The general idea is to support user-units inheritance. The
UNIT_BINDER allows wrapped controls to inherit units from their
parent dialog, while KEYWAY_HOLDER and DIALOG_SHIM allow child
KEYWAY_HOLDERs or DIALOG_SHIMs to inherit units from their
parent.
The GetUserUnits() method signature has to move to KEYWAY_HOLDER
rather than KEYWAY_PLAYER (where it makes more sense) as it’s the
only common ancestor of KEYWAY_PLAYER and DIALOG_SHIM.
As long as we'll be using the UNIT_BINDER more widely, it also
makes sense to move evaluation and validation into it.
This commit also provides eeschema’s DIALOG_LABEL_EDITOR and
pcbnew’s DIALOG_TRACK_VIA_PROPERTIES and DIALOG_SET_GRID as
models of how to use the new user-units inheritance, eval, and
validation.
Fixes: lp:593795
* https://bugs.launchpad.net/kicad/+bug/593795
(cherry picked from commit c8bc53e)
SELECTION now holds EDA_ITEMs not BOARD_ITEMs so various places had to
change to casting the selected items to BOARD_ITEMs.
Fixed compilation warnings on clang (Tom)