canvas_editor library

Classes

BackgroundNode: Background Fill stored as a node. Not selectable via hit-testing; use product language "background fill" in Host UI, not "background node".
CanvasEditorController: Primary Host API for the Canvas Editor Engine.
CanvasEditorState: Immutable snapshot of Engine state for Host UI (toolbars, panels).
CanvasEditorWidget: Zero-chrome embeddable canvas. Host UI wraps this widget and drives it through controller.
CanvasImageLoader: Resolves image pixels for the live canvas and PNG export.
CanvasImageReference: Portable image reference: local file path and/or Host assetId.
CanvasTheme: Selection chrome for CanvasEditorWidget (borders, resize handles, rotation stem).
CoordinateSystem: Maps between Design Document coordinates and on-screen viewport coordinates.
CustomNodeRegistry: Global registry of CustomNodeTypes. Prefer passing types to CanvasEditorController via customNodeTypes at construction.
CustomNodeType<T extends DesignNode>: Registers a custom Node type with JSON + widget builders for Host extensions.
DesignDocument: Persisted canvas content: size plus ordered nodes (JSON-serializable).
DesignNode: A positioned, selectable item on a DesignDocument (text, image, or custom).
ImageNode: Image Node backed by a local file and/or Host-resolved assetId.
TextNode: Editable text Node. Default fontSize is 48.

CanvasImageProvider = ImageProvider<Object> Function(CanvasImageReference ref): Host callback that maps an assetId reference to an ImageProvider.