Avalonia Controls

ProCad.Controls.Avalonia exposes Avalonia viewer/editor controls backed by the shared viewport and Skia renderer.

Responsibilities

The controls should:

display render scenes
manage viewport state
expose selection changes
support pan, zoom, fit, grid, axes, and render options

The application should keep:

document loading
render scene building
editing sessions
command routing
persistence
dialogs
collaboration state

outside the control.

Integration Pattern

Use MVVM bindings for scene/options/selection. Avoid code-behind event handlers. For richer interaction, route input through behavior or command services as the app does.