iwb_canvas_engine 0.1.0

iwb_canvas_engine: ^0.1.0 copied to clipboard

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Performance #

• Cache PathNode local paths to reduce selection rendering overhead.
• Avoid extra scene traversal when rendering selections.
• Simplify selection halo rendering to avoid expensive path unions/layers.

Serialization (breaking) #

• JSON import/export is now v2-only (schemaVersion = 2). v1 scenes are not supported.

Selection transforms #

• Add horizontal flip alongside vertical flip.
• Replace rotate/flip/drag-move action events with ActionType.transform and payload.delta (2×3 affine matrix).
• Breaking: ActionType.rotate and ActionType.flip removed.

Stage 1 — Public API split (basic vs advanced) #

• Add basic.dart entrypoint with a minimal public surface.
• Add advanced.dart entrypoint that exports the full API.
• Document public API split and usage in README.

Stage 2 — SceneController mutations #

• Add SceneController mutation helpers (addNode, removeNode, moveNode).

Stage 3 — notifySceneChanged invariants #

• Enforce selection cleanup on notifySceneChanged() after external mutations.

Stage 4 — NodeId generation #

• Use per-controller NodeId seed; document nodeIdGenerator.

Stage 5 — SceneView without external controller #

• Allow SceneView without an external controller + onControllerReady.

Stage 6 — Locked/transformable rules #

• Define locked/transformable selection rules and document behavior.

Stage 7 — Public API docs #

• Add Dartdoc for SceneController public methods and streams.

Stage 8 — Example app updates #

• Update example app to use basic.dart and demonstrate JSON export/import.

Selection rendering #

• Draw selection outlines using each node's geometry instead of the combined AABB.
• Render selection as a halo around the node geometry.

Backlog item delivered #

• Add viewport culling in ScenePainter to skip offscreen nodes.

• Publish web demo (Flutter Web) to GitHub Pages.
• Improve README links for pub.dev.

• Declare supported platforms on pub.dev.
• Add documentation link to GitHub Pages.

Initial release.

• Scene model (layers, nodes, background, camera)
• Rendering via ScenePainter and SceneView
• Input handling via SceneController (move/draw modes)
• JSON v1 import/export with validation
• Example app and unit tests