Relationship to MEDM

QtEDM is designed as a drop-in replacement for MEDM for the standard MEDM ADL feature set. It reads and writes the same core ADL format, while also supporting a small number of QtEDM-only extensions. The primary differences are:

• Modern GUI toolkit – Qt6 or Qt5 instead of Motif/X11
• Cross-platform runtime – Native Linux, macOS, and Windows builds
• Improved rendering – Better font handling and anti-aliased graphics
• Active development – Ongoing maintenance alongside the legacy MEDM

Both MEDM and QtEDM are built from the same source repository and share the same overall display-model lineage, which keeps the common ADL subset compatible between the two implementations while still allowing QtEDM to add new block types for QtEDM-only widgets.