zoomable_positioned_list 1.1.0

A zoomable scrollable positioned list based on scrollable_positioned_list. Supports pinch-to-zoom with focal point preservation while maintaining index-based position tracking.

zoomable_positioned_list

A zoomable scrollable positioned list based on scrollable_positioned_list. Supports pinch-to-zoom with focal point preservation while maintaining index-based position tracking.

Features

• Pinch-to-zoom: Seamlessly zoom in/out of the list content.
• Scroll to index: Jump or scroll to a specific item index.
• Item positioning: Listen to which items are currently visible.
• Scroll offset monitoring: Track the scroll offset changes.
• Double tap zoom: Double tap to zoom in/out.

Usage

import 'package:zoomable_positioned_list/zoomable_positioned_list.dart';

final ItemScrollController itemScrollController = ItemScrollController();
final ItemPositionsListener itemPositionsListener = ItemPositionsListener.create();

ZoomablePositionedList.builder(
  itemCount: 500,
  itemBuilder: (context, index) => ListTile(title: Text('Item $index')),
  itemScrollController: itemScrollController,
  itemPositionsListener: itemPositionsListener,
  minScale: 1.0,
  maxScale: 3.0,
);

Parameters

Parameter	Description
itemCount	Number of items in the list.
itemBuilder	Builder for list items.
itemScrollController	Controller to jump/scroll to specific items.
itemPositionsListener	Listener for visibility of items.
scrollOffsetListener	Listener for scroll offset changes.
minScale	Minimum zoom scale (default: 1.0).
maxScale	Maximum zoom scale (default: 5.0).
initialScale	Initial zoom scale.
doubleTapScale	Scale to zoom to on double tap.
enableZoom	Enable/disable zoom gesture.

License

This package is based on scrollable_positioned_list from the flutter_widgets package.