CHANGED: The symbol library save menu entry is now only enable when the
currently selected library is modified.
CHANGED: The symbol library save all menu entry and tool bar button are
enabled when one or more of the symbol libraries have been modified.
REMOVED: The ability to save symbol libraries in the legacy file format.
Create an IsContentModified() function in each frame
that provides if the content has been modified, and
use that instead of always copying the checks.
This change completely removes the LIB_ALIAS design pattern an replaces
it by allowing LIB_PART objects to inherit from other LIB_PART objects.
The initial implementation only allows for single inheritance and only
supports the mandatory fields in the derived part because that is all
that the current symbol library file format will support. Once the new
file format is implemented and saving to the old file format is deprecated,
more complex inheritance will be added. The LIB_ALIAS information saved
in the document files was move into the LIB_PART object. This change
impacts virtually every part of the schematic and symbol library editor
code so this commit message is woefully incomplete.
REMOVE: Removed the symbol aliases concept from the schematic and symbol
editors and the symbol viewer.
NEW: Replace the symbol alias concept with simple inheritance that allows
a library symbol to be derived from another library symbol.
Ian McInerney
Wayne Stambaugh
jean-pierre charras
Jeff Young
Mark Roszko
Michael Kavanagh