Editing Model

ProCad.Editing models CAD editing as commands that produce operation batches against editor sessions.

Command Runtime

The command registry resolves command names and aliases, parses command text, provides descriptors and completions, and executes handlers against the active editor session.

Command descriptors provide:

summary text
usage examples
typed parameters
keyword completions
optional/default argument metadata

Operation Batches

Command handlers produce create, update, transform, and delete operations. Batches are recorded through transactions and become the unit for undo/redo, collaboration, and scripting history.

Interactive Adapters

Interactive adapters translate pointer and keyboard gestures into command tokens. They keep the command model and UI input model connected without pushing event handling into view code-behind.

Editing Features

The editing layer includes:

draw commands for line, polyline, xline, ray, circle, arc, ellipse, spline, polygon, rectangle, point, insert, hatch, and boundary
modify commands for move, copy, rotate, scale, mirror, stretch, erase, offset, trim, extend, break, join, fillet, chamfer, array, explode, align, and match properties
annotation commands for text, MText, linear/aligned/radius/diameter/angular dimensions, leader, and multileader
clipboard commands with dependency graph serialization and DXF fallback payloads
XRef reload, bind, and detach commands
undo, redo, clear selection, script, script recording, script save, and help commands

Precision Tools

Snap, tracking, and grip services provide nearest and mode-specific snap candidates, ortho/polar tracking, grip point discovery, and hot-grip resolution.