Overview
Infinite Canvas is a Flutter package that provides an extensible, interactive infinite canvas built on InteractiveViewer and CustomMultiChildLayout. It enables developers to place any widget as a child and manipulate them through panning, zooming, and selection. Ideal for drawing, painting, and signature applications, it supports dynamic content placement across an unlimited workspace. The canvas adapts seamlessly across platforms, offering consistent behavior on Android, iOS, Web, macOS, Windows, and Linux.
Use cases
- Digital whiteboarding
- Interactive art creation
- Signature capture
- Collaborative design tools
- Educational diagramming
- Annotation of documents
Key features
- Supports arbitrary widgets as children
- Panning and zooming via InteractiveViewer
- Customizable layout with CustomMultiChildLayout
- Selectable and movable child elements
- Cross-platform compatibility
- Extensible architecture for custom interactions
Suitable for
- Drawing and sketching apps
- Interactive educational software
- Design collaboration tools
- Document annotation systems
- Creative coding projects
Considerations
- Performance may degrade with many child widgets
- Requires careful management of widget state
- Not optimized for high-frequency real-time updates
- Limited built-in gesture support beyond pan/zoom
- May need additional logic for complex selection behaviors