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803 行
30 KiB
803 行
30 KiB
using System;
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using System.Collections.Generic;
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using RSG;
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using Unity.UIWidgets.animation;
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using Unity.UIWidgets.foundation;
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using Unity.UIWidgets.painting;
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using Unity.UIWidgets.physics;
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using Unity.UIWidgets.rendering;
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using Unity.UIWidgets.scheduler;
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using Unity.UIWidgets.ui;
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using UnityEngine;
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namespace Unity.UIWidgets.widgets {
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public interface ListWheelChildDelegate {
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Widget build(BuildContext context, int index);
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int? estimatedChildCount { get; }
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int trueIndexOf(int index);
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bool shouldRebuild(ListWheelChildDelegate oldDelegate);
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}
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public class ListWheelChildListDelegate : ListWheelChildDelegate {
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public ListWheelChildListDelegate(
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List<Widget> children
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) {
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D.assert(children != null);
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this.children = children;
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}
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public readonly List<Widget> children;
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public int? estimatedChildCount {
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get { return this.children.Count; }
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}
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public Widget build(BuildContext context, int index) {
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if (index < 0 || index >= this.children.Count) {
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return null;
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}
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return new Container(child: this.children[index]);
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}
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public int trueIndexOf(int index) {
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return index;
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}
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public bool shouldRebuild(ListWheelChildDelegate oldDelegate) {
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return this.children != ((ListWheelChildListDelegate) oldDelegate).children;
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}
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}
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public class ListWheelChildLoopingListDelegate : ListWheelChildDelegate {
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public ListWheelChildLoopingListDelegate(
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List<Widget> children
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) {
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D.assert(children != null);
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this.children = children;
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}
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public readonly List<Widget> children;
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public int? estimatedChildCount {
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get { return null; }
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}
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public int trueIndexOf(int index) {
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while (index < 0) {
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index += this.children.Count;
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}
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return index % this.children.Count;
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}
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public Widget build(BuildContext context, int index) {
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if (this.children.isEmpty()) {
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return null;
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}
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while (index < 0) {
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index += this.children.Count;
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}
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return new Container(child: this.children[index % this.children.Count]);
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}
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public bool shouldRebuild(ListWheelChildDelegate oldDelegate) {
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return this.children != ((ListWheelChildLoopingListDelegate) oldDelegate).children;
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}
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}
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public class ListWheelChildBuilderDelegate : ListWheelChildDelegate {
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public ListWheelChildBuilderDelegate(
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IndexedWidgetBuilder builder,
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int? childCount = null
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) {
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D.assert(builder != null);
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this.builder = builder;
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this.childCount = childCount;
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}
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public readonly IndexedWidgetBuilder builder;
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public readonly int? childCount;
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public int? estimatedChildCount {
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get { return this.childCount; }
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}
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public Widget build(BuildContext context, int index) {
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if (this.childCount == null) {
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Widget child = this.builder(context, index);
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return child == null ? null : new Container(child: child);
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}
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if (index < 0 || index >= this.childCount) {
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return null;
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}
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return new Container(child: this.builder(context, index));
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}
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public int trueIndexOf(int index) {
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return index;
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}
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public bool shouldRebuild(ListWheelChildDelegate oldDelegate) {
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return this.builder != ((ListWheelChildBuilderDelegate) oldDelegate).builder ||
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this.childCount != ((ListWheelChildBuilderDelegate) oldDelegate).childCount;
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}
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}
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class ListWheelScrollViewUtils {
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public static int _getItemFromOffset(
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float offset,
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float itemExtent,
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float minScrollExtent,
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float maxScrollExtent
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) {
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return (_clipOffsetToScrollableRange(offset, minScrollExtent, maxScrollExtent) / itemExtent).round();
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}
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public static float _clipOffsetToScrollableRange(
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float offset,
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float minScrollExtent,
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float maxScrollExtent
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) {
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return Mathf.Min(Mathf.Max(offset, minScrollExtent), maxScrollExtent);
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}
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}
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public class FixedExtentScrollController : ScrollController {
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public FixedExtentScrollController(
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int initialItem = 0
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) {
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this.initialItem = initialItem;
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}
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public readonly int initialItem;
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public int selectedItem {
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get {
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D.assert(this.positions.isNotEmpty(),
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() =>
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"FixedExtentScrollController.selectedItem cannot be accessed before a scroll view is built with it."
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);
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D.assert(this.positions.Count == 1,
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() =>
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"The selectedItem property cannot be read when multiple scroll views are attached to the same FixedExtentScrollController."
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);
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_FixedExtentScrollPosition position = (_FixedExtentScrollPosition) this.position;
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return position.itemIndex;
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}
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}
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public IPromise animateToItem(
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int itemIndex,
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TimeSpan duration,
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Curve curve
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) {
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if (!this.hasClients) {
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return Promise.Resolved();
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}
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List<IPromise> futures = new List<IPromise>();
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foreach (_FixedExtentScrollPosition position in this.positions) {
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futures.Add(position.animateTo(
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itemIndex * position.itemExtent,
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duration: duration,
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curve: curve
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));
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}
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return Promise.All(futures);
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}
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public void jumpToItem(int itemIndex) {
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foreach (_FixedExtentScrollPosition position in this.positions) {
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position.jumpTo(itemIndex * position.itemExtent);
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}
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}
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public override ScrollPosition createScrollPosition(ScrollPhysics physics, ScrollContext context,
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ScrollPosition oldPosition) {
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return new _FixedExtentScrollPosition(
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physics: physics,
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context: context,
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initialItem: this.initialItem,
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oldPosition: oldPosition
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);
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}
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}
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public interface IFixedExtentMetrics {
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int itemIndex { set; get; }
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FixedExtentMetrics copyWith(
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float? minScrollExtent = null,
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float? maxScrollExtent = null,
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float? pixels = null,
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float? viewportDimension = null,
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AxisDirection? axisDirection = null,
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int? itemIndex = null
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);
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}
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public class FixedExtentMetrics : FixedScrollMetrics, IFixedExtentMetrics {
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public FixedExtentMetrics(
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int itemIndex,
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float minScrollExtent = 0.0f,
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float maxScrollExtent = 0.0f,
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float pixels = 0.0f,
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float viewportDimension = 0.0f,
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AxisDirection axisDirection = AxisDirection.down
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) : base(
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minScrollExtent: minScrollExtent,
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maxScrollExtent: maxScrollExtent,
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pixels: pixels,
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viewportDimension: viewportDimension,
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axisDirection: axisDirection
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) {
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this.itemIndex = itemIndex;
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}
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public int itemIndex { get; set; }
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public FixedExtentMetrics copyWith(
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float? minScrollExtent = null,
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float? maxScrollExtent = null,
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float? pixels = null,
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float? viewportDimension = null,
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AxisDirection? axisDirection = null,
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int? itemIndex = null
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) {
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return new FixedExtentMetrics(
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minScrollExtent: minScrollExtent ?? this.minScrollExtent,
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maxScrollExtent: maxScrollExtent ?? this.maxScrollExtent,
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pixels: pixels ?? this.pixels,
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viewportDimension: viewportDimension ?? this.viewportDimension,
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axisDirection: axisDirection ?? this.axisDirection,
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itemIndex: itemIndex ?? this.itemIndex
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);
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}
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}
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class _FixedExtentScrollPosition : ScrollPositionWithSingleContext, IFixedExtentMetrics {
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public _FixedExtentScrollPosition(
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ScrollPhysics physics,
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ScrollContext context,
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int initialItem,
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bool keepScrollOffset = true,
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ScrollPosition oldPosition = null,
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string debugLabel = null
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) : base(
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physics: physics,
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context: context,
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initialPixels: _getItemExtentFromScrollContext(context) * initialItem,
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keepScrollOffset: keepScrollOffset,
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oldPosition: oldPosition,
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debugLabel: debugLabel
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) {
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D.assert(
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context is _FixedExtentScrollableState,
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() => "FixedExtentScrollController can only be used with ListWheelScrollViews"
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);
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}
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static float _getItemExtentFromScrollContext(ScrollContext context) {
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_FixedExtentScrollableState scrollable = (_FixedExtentScrollableState) context;
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return scrollable.itemExtent;
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}
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public float itemExtent {
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get { return _getItemExtentFromScrollContext(this.context); }
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}
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public int itemIndex {
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get {
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return ListWheelScrollViewUtils._getItemFromOffset(
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offset: this.pixels,
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itemExtent: this.itemExtent,
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minScrollExtent: this.minScrollExtent,
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maxScrollExtent: this.maxScrollExtent
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);
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}
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set { }
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}
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public FixedExtentMetrics copyWith(
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float? minScrollExtent = null,
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float? maxScrollExtent = null,
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float? pixels = null,
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float? viewportDimension = null,
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AxisDirection? axisDirection = null,
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int? itemIndex = null
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) {
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return new FixedExtentMetrics(
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minScrollExtent: minScrollExtent ?? this.minScrollExtent,
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maxScrollExtent: maxScrollExtent ?? this.maxScrollExtent,
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pixels: pixels ?? this.pixels,
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viewportDimension: viewportDimension ?? this.viewportDimension,
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axisDirection: axisDirection ?? this.axisDirection,
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itemIndex: itemIndex ?? this.itemIndex
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);
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}
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}
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class _FixedExtentScrollable : Scrollable {
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public _FixedExtentScrollable(
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float itemExtent,
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ViewportBuilder viewportBuilder,
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Key key = null,
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AxisDirection axisDirection = AxisDirection.down,
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ScrollController controller = null,
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ScrollPhysics physics = null
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) : base(
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key: key,
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axisDirection: axisDirection,
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controller: controller,
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physics: physics,
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viewportBuilder: viewportBuilder
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) {
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this.itemExtent = itemExtent;
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}
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public readonly float itemExtent;
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public override State createState() {
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return new _FixedExtentScrollableState();
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}
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}
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class _FixedExtentScrollableState : ScrollableState {
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public float itemExtent {
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get {
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_FixedExtentScrollable actualWidget = (_FixedExtentScrollable) this.widget;
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return actualWidget.itemExtent;
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}
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}
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}
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public class FixedExtentScrollPhysics : ScrollPhysics {
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public FixedExtentScrollPhysics(
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ScrollPhysics parent = null
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) : base(parent: parent) { }
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public override ScrollPhysics applyTo(ScrollPhysics ancestor) {
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return new FixedExtentScrollPhysics(parent: this.buildParent(ancestor));
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}
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public override Simulation createBallisticSimulation(ScrollMetrics position, float velocity) {
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D.assert(
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position is _FixedExtentScrollPosition,
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() => "FixedExtentScrollPhysics can only be used with Scrollables that uses " +
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"the FixedExtentScrollController"
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);
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_FixedExtentScrollPosition metrics = (_FixedExtentScrollPosition) position;
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if ((velocity <= 0.0f && metrics.pixels <= metrics.minScrollExtent) ||
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(velocity >= 0.0f && metrics.pixels >= metrics.maxScrollExtent)) {
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return base.createBallisticSimulation(metrics, velocity);
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}
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Simulation testFrictionSimulation =
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base.createBallisticSimulation(metrics, velocity);
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if (testFrictionSimulation != null
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&& (testFrictionSimulation.x(float.PositiveInfinity) == metrics.minScrollExtent
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|| testFrictionSimulation.x(float.PositiveInfinity) == metrics.maxScrollExtent)) {
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return base.createBallisticSimulation(metrics, velocity);
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}
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int settlingItemIndex = ListWheelScrollViewUtils._getItemFromOffset(
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offset: testFrictionSimulation?.x(float.PositiveInfinity) ?? metrics.pixels,
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itemExtent: metrics.itemExtent,
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minScrollExtent: metrics.minScrollExtent,
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maxScrollExtent: metrics.maxScrollExtent
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);
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float settlingPixels = settlingItemIndex * metrics.itemExtent;
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if (velocity.abs() < this.tolerance.velocity
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&& (settlingPixels - metrics.pixels).abs() < this.tolerance.distance) {
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return null;
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}
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if (settlingItemIndex == metrics.itemIndex) {
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return new SpringSimulation(this.spring,
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metrics.pixels,
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settlingPixels,
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velocity,
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tolerance: this.tolerance
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);
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}
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return FrictionSimulation.through(
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metrics.pixels,
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settlingPixels,
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velocity, this.tolerance.velocity * velocity.sign()
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);
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}
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}
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public class ListWheelScrollView : StatefulWidget {
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public ListWheelScrollView(
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float itemExtent,
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List<Widget> children = null,
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Key key = null,
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ScrollController controller = null,
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ScrollPhysics physics = null,
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float diameterRatio = RenderListWheelViewport.defaultDiameterRatio,
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float perspective = RenderListWheelViewport.defaultPerspective,
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float offAxisFraction = 0.0f,
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bool useMagnifier = false,
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float magnification = 1.0f,
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ValueChanged<int> onSelectedItemChanged = null,
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bool clipToSize = true,
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bool renderChildrenOutsideViewport = false,
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ListWheelChildDelegate childDelegate = null
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) : base(key: key) {
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D.assert(children != null || childDelegate != null);
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D.assert(diameterRatio > 0.0, () => RenderListWheelViewport.diameterRatioZeroMessage);
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D.assert(perspective > 0);
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D.assert(perspective <= 0.01f, () => RenderListWheelViewport.perspectiveTooHighMessage);
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D.assert(magnification > 0);
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D.assert(itemExtent > 0);
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D.assert(
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!renderChildrenOutsideViewport || !clipToSize,
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() => RenderListWheelViewport.clipToSizeAndRenderChildrenOutsideViewportConflict
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);
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this.childDelegate = childDelegate ?? new ListWheelChildListDelegate(children: children);
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this.itemExtent = itemExtent;
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this.controller = controller;
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this.physics = physics;
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this.diameterRatio = diameterRatio;
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this.perspective = perspective;
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this.offAxisFraction = offAxisFraction;
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this.useMagnifier = useMagnifier;
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this.magnification = magnification;
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this.onSelectedItemChanged = onSelectedItemChanged;
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this.clipToSize = clipToSize;
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this.renderChildrenOutsideViewport = renderChildrenOutsideViewport;
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}
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public static ListWheelScrollView useDelegate(
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float itemExtent,
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List<Widget> children = null,
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ListWheelChildDelegate childDelegate = null,
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Key key = null,
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ScrollController controller = null,
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ScrollPhysics physics = null,
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float diameterRatio = RenderListWheelViewport.defaultDiameterRatio,
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float perspective = RenderListWheelViewport.defaultPerspective,
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float offAxisFraction = 0.0f,
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bool useMagnifier = false,
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float magnification = 1.0f,
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ValueChanged<int> onSelectedItemChanged = null,
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bool clipToSize = true,
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bool renderChildrenOutsideViewport = false
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) {
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return new ListWheelScrollView(
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itemExtent: itemExtent,
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children: children,
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childDelegate: childDelegate,
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key: key,
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controller: controller,
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physics: physics,
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diameterRatio: diameterRatio,
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perspective: perspective,
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offAxisFraction: offAxisFraction,
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useMagnifier: useMagnifier,
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magnification: magnification,
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onSelectedItemChanged: onSelectedItemChanged,
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clipToSize: clipToSize,
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renderChildrenOutsideViewport: renderChildrenOutsideViewport
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);
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}
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public readonly ScrollController controller;
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public readonly ScrollPhysics physics;
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public readonly float diameterRatio;
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public readonly float perspective;
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public readonly float offAxisFraction;
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public readonly bool useMagnifier;
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public readonly float magnification;
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public readonly float itemExtent;
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public readonly ValueChanged<int> onSelectedItemChanged;
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public readonly bool clipToSize;
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public readonly bool renderChildrenOutsideViewport;
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public readonly ListWheelChildDelegate childDelegate;
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public override State createState() {
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return new _ListWheelScrollViewState();
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}
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}
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class _ListWheelScrollViewState : State<ListWheelScrollView> {
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int _lastReportedItemIndex = 0;
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ScrollController scrollController;
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public override void initState() {
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base.initState();
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this.scrollController = this.widget.controller ?? new FixedExtentScrollController();
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if (this.widget.controller is FixedExtentScrollController controller) {
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this._lastReportedItemIndex = controller.initialItem;
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}
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}
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public override void didUpdateWidget(StatefulWidget oldWidget) {
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base.didUpdateWidget(oldWidget);
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if (this.widget.controller != null && this.widget.controller != this.scrollController) {
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ScrollController oldScrollController = this.scrollController;
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SchedulerBinding.instance.addPostFrameCallback((_) => { oldScrollController.dispose(); });
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this.scrollController = this.widget.controller;
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}
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}
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public override Widget build(BuildContext context) {
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return new NotificationListener<ScrollNotification>(
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onNotification: (ScrollNotification notification) => {
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if (notification.depth == 0
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&& this.widget.onSelectedItemChanged != null
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&& notification is ScrollUpdateNotification
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&& notification.metrics is FixedExtentMetrics metrics) {
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int currentItemIndex = metrics.itemIndex;
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if (currentItemIndex != this._lastReportedItemIndex) {
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this._lastReportedItemIndex = currentItemIndex;
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int trueIndex = this.widget.childDelegate.trueIndexOf(currentItemIndex);
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this.widget.onSelectedItemChanged(trueIndex);
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}
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}
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return false;
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},
|
|
child: new _FixedExtentScrollable(
|
|
controller: this.scrollController,
|
|
physics: this.widget.physics,
|
|
itemExtent: this.widget.itemExtent,
|
|
viewportBuilder: (BuildContext _context, ViewportOffset _offset) => {
|
|
return new ListWheelViewport(
|
|
diameterRatio: this.widget.diameterRatio,
|
|
perspective: this.widget.perspective,
|
|
offAxisFraction: this.widget.offAxisFraction,
|
|
useMagnifier: this.widget.useMagnifier,
|
|
magnification: this.widget.magnification,
|
|
itemExtent: this.widget.itemExtent,
|
|
clipToSize: this.widget.clipToSize,
|
|
renderChildrenOutsideViewport: this.widget.renderChildrenOutsideViewport,
|
|
offset: _offset,
|
|
childDelegate: this.widget.childDelegate
|
|
);
|
|
}
|
|
)
|
|
);
|
|
}
|
|
}
|
|
|
|
public class ListWheelElement : RenderObjectElement, IListWheelChildManager {
|
|
public ListWheelElement(ListWheelViewport widget) : base(widget) { }
|
|
|
|
public new ListWheelViewport widget {
|
|
get { return (ListWheelViewport) base.widget; }
|
|
}
|
|
|
|
public new RenderListWheelViewport renderObject {
|
|
get { return (RenderListWheelViewport) base.renderObject; }
|
|
}
|
|
|
|
|
|
readonly Dictionary<int, Widget> _childWidgets = new Dictionary<int, Widget>();
|
|
|
|
readonly SplayTree<int, Element> _childElements = new SplayTree<int, Element>();
|
|
|
|
public override void update(Widget newWidget) {
|
|
ListWheelViewport oldWidget = this.widget;
|
|
base.update(newWidget);
|
|
ListWheelChildDelegate newDelegate = ((ListWheelViewport) newWidget).childDelegate;
|
|
ListWheelChildDelegate oldDelegate = oldWidget.childDelegate;
|
|
if (newDelegate != oldDelegate &&
|
|
(newDelegate.GetType() != oldDelegate.GetType() || newDelegate.shouldRebuild(oldDelegate))) {
|
|
this.performRebuild();
|
|
}
|
|
}
|
|
|
|
public int? childCount {
|
|
get { return this.widget.childDelegate.estimatedChildCount; }
|
|
}
|
|
|
|
protected override void performRebuild() {
|
|
this._childWidgets.Clear();
|
|
base.performRebuild();
|
|
if (this._childElements.isEmpty()) {
|
|
return;
|
|
}
|
|
|
|
int firstIndex = this._childElements.First()?.Key ?? 0;
|
|
int lastIndex = this._childElements.Last()?.Key ?? 0;
|
|
|
|
for (int index = firstIndex; index <= lastIndex; ++index) {
|
|
Element newChild = this.updateChild(this._childElements[index], this.retrieveWidget(index), index);
|
|
if (newChild != null) {
|
|
this._childElements[index] = newChild;
|
|
}
|
|
else {
|
|
this._childElements.Remove(index);
|
|
}
|
|
}
|
|
}
|
|
|
|
Widget retrieveWidget(int index) {
|
|
return this._childWidgets.putIfAbsent(index,
|
|
() => { return this.widget.childDelegate.build(this, index); });
|
|
}
|
|
|
|
public bool childExistsAt(int index) {
|
|
return this.retrieveWidget(index) != null;
|
|
}
|
|
|
|
public void createChild(int index, RenderBox after) {
|
|
this.owner.buildScope(this, () => {
|
|
bool insertFirst = after == null;
|
|
D.assert(insertFirst || this._childElements[index - 1] != null);
|
|
// Debug.Log($"{index}: {this._childElements.getOrDefault(index)}");
|
|
|
|
Element newChild = this.updateChild(this._childElements.getOrDefault(index), this.retrieveWidget(index),
|
|
index);
|
|
|
|
// Debug.Log(newChild);
|
|
if (newChild != null) {
|
|
this._childElements[index] = newChild;
|
|
}
|
|
else {
|
|
this._childElements.Remove(index);
|
|
}
|
|
});
|
|
}
|
|
|
|
public void removeChild(RenderBox child) {
|
|
int index = this.renderObject.indexOf(child);
|
|
this.owner.buildScope(this, () => {
|
|
D.assert(this._childElements.ContainsKey(index));
|
|
Element result = this.updateChild(this._childElements[index], null, index);
|
|
D.assert(result == null);
|
|
this._childElements.Remove(index);
|
|
D.assert(!this._childElements.ContainsKey(index));
|
|
});
|
|
}
|
|
|
|
protected override Element updateChild(Element child, Widget newWidget, object newSlot) {
|
|
ListWheelParentData oldParentData = (ListWheelParentData) child?.renderObject?.parentData;
|
|
Element newChild = base.updateChild(child, newWidget, newSlot);
|
|
ListWheelParentData newParentData = (ListWheelParentData) newChild?.renderObject?.parentData;
|
|
if (newParentData != null) {
|
|
newParentData.index = (int) newSlot;
|
|
if (oldParentData != null) {
|
|
newParentData.offset = oldParentData.offset;
|
|
}
|
|
}
|
|
|
|
return newChild;
|
|
}
|
|
|
|
protected override void insertChildRenderObject(RenderObject child, object slot) {
|
|
RenderListWheelViewport renderObject = this.renderObject;
|
|
D.assert(renderObject.debugValidateChild(child));
|
|
|
|
renderObject.insert((RenderBox) child,
|
|
(RenderBox) this._childElements.getOrDefault((int) slot - 1)?.renderObject);
|
|
// Debug.Log($"insert: {this._childElements.getOrDefault((int) slot - 1)}");
|
|
|
|
|
|
D.assert(renderObject == this.renderObject);
|
|
}
|
|
|
|
protected override void moveChildRenderObject(RenderObject child, dynamic slot) {
|
|
const string moveChildRenderObjectErrorMessage =
|
|
"Currently we maintain the list in contiguous increasing order, so " +
|
|
"moving children around is not allowed.";
|
|
D.assert(false, () => moveChildRenderObjectErrorMessage);
|
|
}
|
|
|
|
protected override void removeChildRenderObject(RenderObject child) {
|
|
D.assert(child.parent == this.renderObject);
|
|
this.renderObject.remove((RenderBox) child);
|
|
}
|
|
|
|
public override void visitChildren(ElementVisitor visitor) {
|
|
foreach (var item in this._childElements) {
|
|
visitor(item.Value);
|
|
}
|
|
}
|
|
|
|
protected override void forgetChild(Element child) {
|
|
this._childElements.Remove((int) (child.slot));
|
|
}
|
|
}
|
|
|
|
public class ListWheelViewport : RenderObjectWidget {
|
|
public ListWheelViewport(
|
|
float itemExtent,
|
|
ViewportOffset offset,
|
|
ListWheelChildDelegate childDelegate,
|
|
Key key = null,
|
|
float diameterRatio = RenderListWheelViewport.defaultDiameterRatio,
|
|
float perspective = RenderListWheelViewport.defaultPerspective,
|
|
float offAxisFraction = 0.0f,
|
|
bool useMagnifier = false,
|
|
float magnification = 1.0f,
|
|
bool clipToSize = true,
|
|
bool renderChildrenOutsideViewport = false
|
|
) : base(key: key) {
|
|
D.assert(childDelegate != null);
|
|
D.assert(offset != null);
|
|
D.assert(diameterRatio > 0, () => RenderListWheelViewport.diameterRatioZeroMessage);
|
|
D.assert(perspective > 0);
|
|
D.assert(perspective <= 0.01, () => RenderListWheelViewport.perspectiveTooHighMessage);
|
|
D.assert(itemExtent > 0);
|
|
D.assert(
|
|
!renderChildrenOutsideViewport || !clipToSize,
|
|
() => RenderListWheelViewport.clipToSizeAndRenderChildrenOutsideViewportConflict
|
|
);
|
|
|
|
this.itemExtent = itemExtent;
|
|
this.offset = offset;
|
|
this.childDelegate = childDelegate;
|
|
this.diameterRatio = diameterRatio;
|
|
this.perspective = perspective;
|
|
this.offAxisFraction = offAxisFraction;
|
|
this.useMagnifier = useMagnifier;
|
|
this.magnification = magnification;
|
|
this.clipToSize = clipToSize;
|
|
this.renderChildrenOutsideViewport = renderChildrenOutsideViewport;
|
|
}
|
|
|
|
public readonly float diameterRatio;
|
|
public readonly float perspective;
|
|
public readonly float offAxisFraction;
|
|
public readonly bool useMagnifier;
|
|
public readonly float magnification;
|
|
public readonly float itemExtent;
|
|
public readonly bool clipToSize;
|
|
public readonly bool renderChildrenOutsideViewport;
|
|
public readonly ViewportOffset offset;
|
|
public readonly ListWheelChildDelegate childDelegate;
|
|
|
|
public override Element createElement() {
|
|
return new ListWheelElement(this);
|
|
}
|
|
|
|
public override RenderObject createRenderObject(BuildContext context) {
|
|
ListWheelElement childManager = (ListWheelElement) context;
|
|
return new RenderListWheelViewport(
|
|
childManager: childManager,
|
|
offset: this.offset,
|
|
diameterRatio: this.diameterRatio,
|
|
perspective: this.perspective,
|
|
offAxisFraction: this.offAxisFraction,
|
|
useMagnifier: this.useMagnifier,
|
|
magnification: this.magnification,
|
|
itemExtent: this.itemExtent,
|
|
clipToSize: this.clipToSize,
|
|
renderChildrenOutsideViewport: this.renderChildrenOutsideViewport
|
|
);
|
|
}
|
|
|
|
public override void updateRenderObject(BuildContext context, RenderObject renderObject) {
|
|
var viewport = (RenderListWheelViewport) renderObject;
|
|
viewport.offset = this.offset;
|
|
viewport.diameterRatio = this.diameterRatio;
|
|
viewport.perspective = this.perspective;
|
|
viewport.offAxisFraction = this.offAxisFraction;
|
|
viewport.useMagnifier = this.useMagnifier;
|
|
viewport.magnification = this.magnification;
|
|
viewport.itemExtent = this.itemExtent;
|
|
viewport.clipToSize = this.clipToSize;
|
|
viewport.renderChildrenOutsideViewport = this.renderChildrenOutsideViewport;
|
|
}
|
|
}
|
|
}
|