infinity_canvas 0.10.0

High-performance infinite canvas for Flutter with layered rendering and controller-driven camera/item APIs.

0.10.0

New features

• Auto-measured item sizes now emit change signals on CanvasItemsApi (controller.items), so consumers can reflow layouts (e.g. stacking a column of unknown-height nodes) without post-frame retry/settle loops:

  • ValueListenable<Size?>? measuredSizeListenable(String itemId) — per-item; value is null until first layout, then fires on each measured-size change.
  • ValueListenable<int> get measurementRevision — increments whenever any item's measured size changes; convenient for reflowing a group from one listener.

  Guarantee: when either signal fires, getMeasuredSize/getEffectiveSize already return the new size (no stale one-frame lag).

Breaking changes

• Added the two members above to the CanvasItemsApi interface. This is additive for code that only uses controller.items, but a compile-time break for any code that implements CanvasItemsApi (or CanvasApi).

  Migrate: implementers must add measuredSizeListenable and measurementRevision to their implementation.

0.9.0

Breaking changes

• CanvasLayerController renamed to CanvasApi.

  Migrate: replace every occurrence of CanvasLayerController with CanvasApi.

• CanvasTransformPainterBuilder now receives a second CanvasApi controller parameter, consistent with CanvasTransformWidgetBuilder.

  Migrate: add _ or a named parameter to every painterBuilder lambda.

  // Before
  painterBuilder: (t) => MyPainter(transform: t)
  // After
  painterBuilder: (t, controller) => MyPainter(transform: t, controller: controller)
  

• CanvasApi is the single consistent interface passed to both builder callbacks, exposing the full canvas API via .camera, .items, and .layers.

0.8.1

Initial standalone release of infinity_canvas.

• Infinite canvas with layered rendering for positioned items, painters, and overlays
• Controller-driven camera APIs for pan, zoom, jump, animate, and fit operations
• Programmatic item APIs for world position updates, batch updates, transforms, and bring-to-front
• Input behaviors for desktop, touch, and locked interaction modes
• Culling and throttled render stats for larger scenes
• Support for hover, drag, diagnostics, and screen/world coordinate conversion