JulianBissekkou

{
  "version": 8,
  "sprite": "https://www.arcgis.com/sharing/rest/content/items/2979525c704b4900811fb29822e0f27c/resources/sprites/sprite-1650359779877",
  "glyphs": "https://basemaps.arcgis.com/arcgis/rest/services/World_Basemap_v2/VectorTileServer/resources/fonts/{fontstack}/{range}.pbf",
  "sources": {
    "esri": {
      "type": "vector",
      "url": "https://basemaps.arcgis.com/arcgis/rest/services/World_Basemap_v2/VectorTileServer",
      "tiles": [
        "https://basemaps.arcgis.com/arcgis/rest/services/World_Basemap_v2/VectorTileServer/tile/{z}/{y}/{x}.pbf"

JulianBissekkou

  @override
  Widget build(BuildContext context) {
    return PullToReachScope(
      child: Scaffold(
        appBar: AppBar(
          actions: [
            ReachableIcon(
              child: Icon(Icons.search),
              index: 2,
              onSelect: () => _routeToPage("search!"),

JulianBissekkou

class ReachableIcon extends StatefulWidget {
  final Widget child;
  final int index;
  final VoidCallback onSelect;

  ReachableIcon({
    @required this.child,
    @required this.index,
    @required this.onSelect,
  });

JulianBissekkou

@immutable
class Reachable extends StatefulWidget {
  final Widget child;
  final int index;

  final ValueChanged<bool> onFocusChanged;
  final VoidCallback onSelect;

  Reachable({
    @required this.child,

JulianBissekkou

  bool _didDragEnd(ScrollNotification notification) {
    // Whenever dragDetails are null the scrolling happends without the users input
    // meaning that the user release the finger --> drag has ended.
    // For Cupertino Scrollables the ScrollEndNotification can not be used
    // since it will be send after the list scroll has completely ended and
    // the list is in its initial state
    if (notification is ScrollUpdateNotification &&
        notification.dragDetails == null) {
      return true;
    }

JulianBissekkou

bool _handleScrollNotification(ScrollNotification notification) {
    if (_didDragStart(notification)) {
      _dragOffset = 0;
      _pullToReachStarted = true;
    }

    if (_didDragEnd(notification)) {
      _dragOffset = 0;
      _pullToReachStarted = false;

JulianBissekkou

class ScrollToIndexConverter extends StatefulWidget {
  final Widget child;
  final int itemCount;

  final double dragExtentPercentage;

  ScrollToIndexConverter({
    @required this.child,
    @required this.itemCount,
    this.dragExtentPercentage = 0.2,

JulianBissekkou

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:pull_down_to_reach/index_calculator/index_calculator.dart';
import 'package:pull_down_to_reach/widgets/pull_to_reach_scope.dart';

abstract class IndexCalculator {
  int getIndexForScrollPercent(double scrollPercent);
}

class ScrollToIndexConverter extends StatefulWidget {

JulianBissekkou

  double _calculateScrollProgress(ScrollNotification notification) {
    var containerExtent = notification.metrics.viewportDimension;

    if (notification is ScrollUpdateNotification) {
      _dragOffset -= notification.scrollDelta;
    }

    if (notification is OverscrollNotification) {
      _dragOffset -= notification.overscroll;
    }

JulianBissekkou

NotificationListener<ScrollNotification>(
      onNotification: (notification) {
        // return true if 
        // the notification shouldn't be forwarded to any parent widgets
        // false otherwise
        
        _handleScrollNotification(notification);
        return false;
      },
      child: child,