Shapes

Ambit ships with five shapes. You can add more without changing the library.

Built in

Rectangle — two corners, 4 corner handles (corner). Drag a corner to resize, drag the body to move. LockAspectRatio keeps the ratio if you need it. Edge-midpoint handles were intentionally omitted (use a custom region via IRegionTypeRegistry if you need single-axis handles).

new RectangleRegion(new NormalizedPoint(0.1, 0.1), new NormalizedPoint(0.4, 0.4), style, label: "Area A");

Ellipse — same 4 corner handles as rectangle, but drawn as an oval. Uses the same bounding box (edge handles omitted for same reason).

new EllipseRegion(a, b, style);

Polygon — closed shape with many points. Each vertex is a handle. Call InsertVertex to add a point mid-edge.

new PolygonRegion(vertices, style);

Polyline — like polygon but open. Good for paths with bends.

new PolylineRegion(vertices, style);

Line — just two points. No fill, only stroke. Direction is not built in. Add a DirectionIndicatorDecoration if you need arrows.

new LineRegion(start, end, style, label: "Connector");

All points are 0..1 normalized. All shapes have Style and optional Label.

Add your own

See Extensibility — implement IEditableRegion, a factory, and a renderer, then register both. The sample adds CircleRegion this way.