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571 行
25 KiB
571 行
25 KiB
using System;
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using System.Collections.Generic;
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using System.Linq;
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using uiwidgets;
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using Unity.UIWidgets.animation;
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using Unity.UIWidgets.foundation;
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using Unity.UIWidgets.gestures;
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using Unity.UIWidgets.material;
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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.ui;
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using Unity.UIWidgets.widgets;
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using UnityEngine;
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using Color = Unity.UIWidgets.ui.Color;
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using Rect = Unity.UIWidgets.ui.Rect;
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namespace UIWidgetsGallery.gallery {
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class AnimationHomeUtils
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{
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public static readonly Color _kAppBackgroundColor = Colors.blue.withAlpha(128);
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public static readonly TimeSpan _kScrollDuration = new TimeSpan(0, 0, 0, 0, 100);
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public static readonly Curve _kScrollCurve = Curves.fastOutSlowIn;
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public const float _kAppBarMinHeight = 90.0f;
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public const float _kAppBarMidHeight = 256.0f;
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}
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class _RenderStatusBarPaddingSliver : RenderSliver {
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public _RenderStatusBarPaddingSliver(
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float? maxHeight = null,
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float? scrollFactor = null
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) {
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D.assert(maxHeight >= 0.0f);
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D.assert(scrollFactor >= 1.0f);
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this._maxHeight = maxHeight;
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this._scrollFactor = scrollFactor;
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}
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public float? maxHeight {
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get { return this._maxHeight; }
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set {
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D.assert(this.maxHeight >= 0.0f);
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if (this._maxHeight == value) {
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return;
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}
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this._maxHeight = value;
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this.markNeedsLayout();
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}
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}
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float? _maxHeight;
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public float? scrollFactor {
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get { return this._scrollFactor; }
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set {
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D.assert(this.scrollFactor >= 1.0f);
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if (this._scrollFactor == value) {
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return;
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}
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this._scrollFactor = value;
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this.markNeedsLayout();
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}
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}
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float? _scrollFactor;
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protected override void performLayout() {
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float? height =
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(this.maxHeight - this.constraints.scrollOffset / this.scrollFactor)?.clamp(0.0f,
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this.maxHeight ?? 0.0f);
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this.geometry = new SliverGeometry(
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paintExtent: Mathf.Min(height ?? 0.0f, this.constraints.remainingPaintExtent),
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scrollExtent: this.maxHeight ?? 0.0f,
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maxPaintExtent: this.maxHeight ?? 0.0f
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);
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}
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}
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class _StatusBarPaddingSliver : SingleChildRenderObjectWidget {
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public _StatusBarPaddingSliver(
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Key key = null,
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float? maxHeight = null,
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float scrollFactor = 5.0f
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) : base(key: key) {
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D.assert(maxHeight != null && maxHeight >= 0.0f);
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D.assert(scrollFactor >= 1.0f);
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this.maxHeight = maxHeight;
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this.scrollFactor = scrollFactor;
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}
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public readonly float? maxHeight;
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public readonly float scrollFactor;
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public override RenderObject createRenderObject(BuildContext context) {
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return new _RenderStatusBarPaddingSliver(
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maxHeight: this.maxHeight,
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scrollFactor: this.scrollFactor
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);
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}
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public override void updateRenderObject(BuildContext context, RenderObject _renderObject) {
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_RenderStatusBarPaddingSliver renderObject = _renderObject as _RenderStatusBarPaddingSliver;
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renderObject.maxHeight = this.maxHeight;
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renderObject.scrollFactor = this.scrollFactor;
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}
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public override void debugFillProperties(DiagnosticPropertiesBuilder description) {
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base.debugFillProperties(description);
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description.add(new FloatProperty("maxHeight", this.maxHeight));
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description.add(new FloatProperty("scrollFactor", this.scrollFactor));
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}
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}
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class _SliverAppBarDelegate : SliverPersistentHeaderDelegate {
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public _SliverAppBarDelegate(
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float minHeight,
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float maxHeight,
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Widget child
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) {
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this.minHeight = minHeight;
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this.maxHeight = maxHeight;
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this.child = child;
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}
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public readonly float minHeight;
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public readonly float maxHeight;
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public readonly Widget child;
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public override float? minExtent {
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get { return this.minHeight; }
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}
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public override float? maxExtent {
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get { return Mathf.Max(this.maxHeight, this.minHeight); }
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}
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public override Widget build(BuildContext context, float shrinkOffset, bool overlapsContent) {
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return SizedBox.expand(child: this.child);
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}
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public override bool shouldRebuild(SliverPersistentHeaderDelegate _oldDelegate) {
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_SliverAppBarDelegate oldDelegate = _oldDelegate as _SliverAppBarDelegate;
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return this.maxHeight != oldDelegate.maxHeight
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|| this.minHeight != oldDelegate.minHeight
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|| this.child != oldDelegate.child;
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}
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public override string ToString() {
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return "_SliverAppBarDelegate";
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}
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}
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class _AllSectionsLayout : MultiChildLayoutDelegate {
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public _AllSectionsLayout(
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Alignment translation,
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float tColumnToRow,
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float tCollapsed,
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int cardCount,
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float selectedIndex
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) {
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this.translation = translation;
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this.tColumnToRow = tColumnToRow;
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this.tCollapsed = tCollapsed;
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this.cardCount = cardCount;
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this.selectedIndex = selectedIndex;
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}
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public readonly Alignment translation;
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public readonly float tColumnToRow;
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public readonly float tCollapsed;
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public readonly int cardCount;
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public readonly float selectedIndex;
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Rect _interpolateRect(Rect begin, Rect end) {
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return Rect.lerp(begin, end, this.tColumnToRow);
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}
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Offset _interpolatePoint(Offset begin, Offset end) {
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return Offset.lerp(begin, end, this.tColumnToRow);
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}
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public override void performLayout(Size size) {
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//Debug.Log("perform layout = " + size.ToString() + " " + selectedIndex + " " + tColumnToRow);
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float columnCardX = size.width / 5.0f;
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float columnCardWidth = size.width - columnCardX;
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float columnCardHeight = size.height / this.cardCount;
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float rowCardWidth = size.width;
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Offset offset = Offset.zero; //this.translation.alongSize(size);
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float columnCardY = 0.0f;
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float rowCardX = -(this.selectedIndex * rowCardWidth);
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float columnTitleX = size.width / 10.0f;
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float rowTitleWidth = size.width * ((1 + this.tCollapsed) / 2.25f);
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float rowTitleX = (size.width - rowTitleWidth) / 2.0f - this.selectedIndex * rowTitleWidth;
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const float paddedSectionIndicatorWidth = AnimationWidgetsUtils.kSectionIndicatorWidth + 8.0f;
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float rowIndicatorWidth = paddedSectionIndicatorWidth +
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(1.0f - this.tCollapsed) * (rowTitleWidth - paddedSectionIndicatorWidth);
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float rowIndicatorX = (size.width - rowIndicatorWidth) / 2.0f - this.selectedIndex * rowIndicatorWidth;
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for (int index = 0; index < this.cardCount; index++) {
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Rect columnCardRect = Rect.fromLTWH(columnCardX, columnCardY, columnCardWidth, columnCardHeight);
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Rect rowCardRect = Rect.fromLTWH(rowCardX, 0.0f, rowCardWidth, size.height);
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Rect cardRect = this._interpolateRect(columnCardRect, rowCardRect).shift(offset);
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string cardId = $"card{index}";
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if (this.hasChild(cardId)) {
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this.layoutChild(cardId, BoxConstraints.tight(cardRect.size));
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this.positionChild(cardId, cardRect.topLeft);
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}
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Size titleSize = this.layoutChild($"title{index}", BoxConstraints.loose(cardRect.size));
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float columnTitleY = columnCardRect.centerLeft.dy - titleSize.height / 2.0f;
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float rowTitleY = rowCardRect.centerLeft.dy - titleSize.height / 2.0f;
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float centeredRowTitleX = rowTitleX + (rowTitleWidth - titleSize.width) / 2.0f;
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Offset columnTitleOrigin = new Offset(columnTitleX, columnTitleY);
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Offset rowTitleOrigin = new Offset(centeredRowTitleX, rowTitleY);
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Offset titleOrigin = this._interpolatePoint(columnTitleOrigin, rowTitleOrigin);
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this.positionChild($"title{index}", titleOrigin + offset);
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Size indicatorSize = this.layoutChild($"indicator{index}", BoxConstraints.loose(cardRect.size));
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float columnIndicatorX = cardRect.centerRight.dx - indicatorSize.width - 16.0f;
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float columnIndicatorY = cardRect.bottomRight.dy - indicatorSize.height - 16.0f;
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Offset columnIndicatorOrigin = new Offset(columnIndicatorX, columnIndicatorY);
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Rect titleRect = Rect.fromPoints(titleOrigin, titleSize.bottomRight(titleOrigin));
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float centeredRowIndicatorX = rowIndicatorX + (rowIndicatorWidth - indicatorSize.width) / 2.0f;
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float rowIndicatorY = titleRect.bottomCenter.dy + 16.0f;
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Offset rowIndicatorOrigin = new Offset(centeredRowIndicatorX, rowIndicatorY);
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Offset indicatorOrigin = this._interpolatePoint(columnIndicatorOrigin, rowIndicatorOrigin);
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this.positionChild($"indicator{index}", indicatorOrigin + offset);
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columnCardY += columnCardHeight;
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rowCardX += rowCardWidth;
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rowTitleX += rowTitleWidth;
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rowIndicatorX += rowIndicatorWidth;
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}
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}
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public override bool shouldRelayout(MultiChildLayoutDelegate _oldDelegate) {
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_AllSectionsLayout oldDelegate = _oldDelegate as _AllSectionsLayout;
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return this.tColumnToRow != oldDelegate.tColumnToRow
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|| this.cardCount != oldDelegate.cardCount
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|| this.selectedIndex != oldDelegate.selectedIndex;
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}
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}
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class _AllSectionsView : AnimatedWidget {
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public _AllSectionsView(
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Key key = null,
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int? sectionIndex = null,
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List<Section> sections = null,
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ValueNotifier<float> selectedIndex = null,
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float? minHeight = null,
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float? midHeight = null,
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float? maxHeight = null,
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List<Widget> sectionCards = null
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) : base(key: key, listenable: selectedIndex) {
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sectionCards = sectionCards ?? new List<Widget>();
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D.assert(sections != null);
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D.assert(sectionCards.Count == sections.Count);
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D.assert(sectionIndex >= 0 && sectionIndex < sections.Count);
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D.assert(selectedIndex != null);
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D.assert(selectedIndex.value >= 0.0f && (float) selectedIndex.value < sections.Count);
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this.sectionIndex = sectionIndex;
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this.sections = sections;
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this.selectedIndex = selectedIndex;
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this.minHeight = minHeight;
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this.midHeight = midHeight;
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this.maxHeight = maxHeight;
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this.sectionCards = sectionCards;
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}
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public readonly int? sectionIndex;
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public readonly List<Section> sections;
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public readonly ValueNotifier<float> selectedIndex;
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public readonly float? minHeight;
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public readonly float? midHeight;
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public readonly float? maxHeight;
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public readonly List<Widget> sectionCards;
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float _selectedIndexDelta(int index) {
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return (index - this.selectedIndex.value).abs().clamp(0.0f, 1.0f);
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}
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Widget _build(BuildContext context, BoxConstraints constraints) {
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Size size = constraints.biggest;
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float? tColumnToRow =
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1.0f - ((size.height - this.midHeight) /
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(this.maxHeight - this.midHeight))?.clamp(0.0f, 1.0f);
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float? tCollapsed =
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1.0f - ((size.height - this.minHeight) /
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(this.midHeight - this.minHeight))?.clamp(0.0f, 1.0f);
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float _indicatorOpacity(int index) {
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return 1.0f - this._selectedIndexDelta(index) * 0.5f;
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}
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float? _titleOpacity(int index) {
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return 1.0f - this._selectedIndexDelta(index) * tColumnToRow * 0.5f;
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}
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float? _titleScale(int index) {
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return 1.0f - this._selectedIndexDelta(index) * tColumnToRow * 0.15f;
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}
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List<Widget> children = new List<Widget>(this.sectionCards);
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for (int index = 0; index < this.sections.Count; index++) {
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Section section = this.sections[index];
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children.Add(new LayoutId(
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id: $"title{index}",
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child: new SectionTitle(
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section: section,
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scale: _titleScale(index),
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opacity: _titleOpacity(index)
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)
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));
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}
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for (int index = 0; index < this.sections.Count; index++) {
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children.Add(new LayoutId(
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id: $"indicator{index}",
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child: new SectionIndicator(
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opacity: _indicatorOpacity(index)
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)
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));
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}
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return new CustomMultiChildLayout(
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layoutDelegate: new _AllSectionsLayout(
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translation: new Alignment((this.selectedIndex.value - this.sectionIndex) * 2.0f - 1.0f ?? 0.0f,
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-1.0f),
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tColumnToRow: tColumnToRow ?? 0.0f,
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tCollapsed: tCollapsed ?? 0.0f,
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cardCount: this.sections.Count,
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selectedIndex: this.selectedIndex.value
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),
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children: children
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);
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}
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protected override Widget build(BuildContext context) {
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return new LayoutBuilder(builder: this._build);
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}
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}
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class _SnappingScrollPhysics : ClampingScrollPhysics {
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public _SnappingScrollPhysics(
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ScrollPhysics parent = null,
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float? midScrollOffset = null
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) : base(parent: parent) {
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D.assert(midScrollOffset != null);
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this.midScrollOffset = midScrollOffset ?? 0.0f;
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}
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public readonly float midScrollOffset;
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public override ScrollPhysics applyTo(ScrollPhysics ancestor) {
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return new _SnappingScrollPhysics(parent: this.buildParent(ancestor),
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midScrollOffset: this.midScrollOffset);
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}
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Simulation _toMidScrollOffsetSimulation(float offset, float dragVelocity) {
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float velocity = Mathf.Max(dragVelocity, this.minFlingVelocity);
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return new ScrollSpringSimulation(this.spring, offset, this.midScrollOffset, velocity,
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tolerance: this.tolerance);
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}
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Simulation _toZeroScrollOffsetSimulation(float offset, float dragVelocity) {
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float velocity = Mathf.Max(dragVelocity, this.minFlingVelocity);
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return new ScrollSpringSimulation(this.spring, offset, 0.0f, velocity, tolerance: this.tolerance);
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}
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public override Simulation createBallisticSimulation(ScrollMetrics position, float dragVelocity) {
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Simulation simulation = base.createBallisticSimulation(position, dragVelocity);
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float offset = position.pixels;
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if (simulation != null) {
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float simulationEnd = simulation.x(float.PositiveInfinity);
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if (simulationEnd >= this.midScrollOffset) {
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return simulation;
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}
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if (dragVelocity > 0.0f) {
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return this._toMidScrollOffsetSimulation(offset, dragVelocity);
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}
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if (dragVelocity < 0.0f) {
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return this._toZeroScrollOffsetSimulation(offset, dragVelocity);
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}
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}
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else {
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float snapThreshold = this.midScrollOffset / 2.0f;
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if (offset >= snapThreshold && offset < this.midScrollOffset) {
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return this._toMidScrollOffsetSimulation(offset, dragVelocity);
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}
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if (offset > 0.0f && offset < snapThreshold) {
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return this._toZeroScrollOffsetSimulation(offset, dragVelocity);
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}
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}
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return simulation;
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}
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}
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public class AnimationDemoHome : StatefulWidget {
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public AnimationDemoHome(Key key = null) : base(key: key) {
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}
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public const string routeName = "/animation";
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public override State createState() {
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return new _AnimationDemoHomeState();
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}
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}
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class _AnimationDemoHomeState : State<AnimationDemoHome> {
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ScrollController _scrollController = new ScrollController();
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PageController _headingPageController = new PageController();
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PageController _detailsPageController = new PageController();
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ScrollPhysics _headingScrollPhysics = new NeverScrollableScrollPhysics();
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ValueNotifier<float> selectedIndex = new ValueNotifier<float>(0.0f);
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public override Widget build(BuildContext context) {
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return new Scaffold(
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backgroundColor: AnimationHomeUtils._kAppBackgroundColor,
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body: new Builder(
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builder: this._buildBody
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)
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);
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}
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bool _handleScrollNotification(ScrollNotification notification, float midScrollOffset) {
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//Debug.Log("1111 = " + _headingPageController.ToString() + " " + _headingPageController.page);
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if (notification.depth == 0 && notification is ScrollUpdateNotification) {
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ScrollPhysics physics = this._scrollController.position.pixels >= midScrollOffset
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? (ScrollPhysics) new PageScrollPhysics()
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: new NeverScrollableScrollPhysics();
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if (physics != this._headingScrollPhysics) {
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this.setState(() => { this._headingScrollPhysics = physics; });
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}
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}
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return false;
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}
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bool _handlePageNotification(ScrollNotification notification, PageController leader, PageController follower) {
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if (notification.depth == 0 && notification is ScrollUpdateNotification) {
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this.selectedIndex.value = leader.page;
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//Debug.Log("selected change to Index =" + selectedIndex.value);
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if (follower.page != leader.page) {
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follower.position.jumpTo(leader.position.pixels); // ignore: deprecated_member_use
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}
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}
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return false;
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}
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List<Widget> _allHeadingItems(float maxHeight, float midScrollOffset) {
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List<Widget> sectionCards = new List<Widget> { };
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for (int index = 0; index < AnimationSectionsUtils.allSections.Count; index++) {
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sectionCards.Add(new LayoutId(
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id: $"card{index}",
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child: new SectionCard(section: AnimationSectionsUtils.allSections[index])
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));
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}
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List<Widget> headings = new List<Widget> { };
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for (int index = 0; index < AnimationSectionsUtils.allSections.Count; index++) {
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headings.Add(new Container(
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color: AnimationHomeUtils._kAppBackgroundColor,
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child: new ClipRect(
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child: new _AllSectionsView(
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sectionIndex: index,
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sections: AnimationSectionsUtils.allSections,
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selectedIndex: this.selectedIndex,
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minHeight: AnimationHomeUtils._kAppBarMinHeight,
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midHeight: AnimationHomeUtils._kAppBarMidHeight,
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maxHeight: maxHeight,
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sectionCards: sectionCards
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)
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)
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)
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);
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}
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return headings;
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}
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Widget _buildBody(BuildContext context) {
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MediaQueryData mediaQueryData = MediaQuery.of(context);
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float statusBarHeight = mediaQueryData.padding.top;
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float screenHeight = mediaQueryData.size.height;
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float appBarMaxHeight = screenHeight - statusBarHeight;
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|
|
|
float appBarMidScrollOffset = statusBarHeight + appBarMaxHeight - AnimationHomeUtils._kAppBarMidHeight;
|
|
|
|
return SizedBox.expand(
|
|
child: new NotificationListener<ScrollNotification>(
|
|
onNotification: (ScrollNotification notification) => {
|
|
return this._handleScrollNotification(notification, appBarMidScrollOffset);
|
|
},
|
|
child: new CustomScrollView(
|
|
controller: this._scrollController,
|
|
physics: new _SnappingScrollPhysics(midScrollOffset: appBarMidScrollOffset),
|
|
slivers: new List<Widget> {
|
|
new _StatusBarPaddingSliver(
|
|
maxHeight: statusBarHeight,
|
|
scrollFactor: 7.0f
|
|
),
|
|
new SliverPersistentHeader(
|
|
pinned: true,
|
|
del: new _SliverAppBarDelegate(
|
|
minHeight: AnimationHomeUtils._kAppBarMinHeight,
|
|
maxHeight: appBarMaxHeight,
|
|
child: new NotificationListener<ScrollNotification>(
|
|
onNotification: (ScrollNotification notification) => {
|
|
return this._handlePageNotification(notification,
|
|
this._headingPageController, this._detailsPageController);
|
|
},
|
|
child: new PageView(
|
|
physics: this._headingScrollPhysics,
|
|
controller: this._headingPageController,
|
|
children: this._allHeadingItems(appBarMaxHeight,
|
|
appBarMidScrollOffset)
|
|
)
|
|
)
|
|
)
|
|
),
|
|
new SliverToBoxAdapter(
|
|
child: new SizedBox(
|
|
height: 300.0f,
|
|
child: new NotificationListener<ScrollNotification>(
|
|
onNotification: (ScrollNotification notification) =>
|
|
{
|
|
return false;
|
|
//return this._handlePageNotification(notification,
|
|
// this._detailsPageController, this._headingPageController);
|
|
},
|
|
child: new PageView(
|
|
controller: this._detailsPageController,
|
|
physics: new NeverScrollableScrollPhysics(),
|
|
children: AnimationSectionsUtils.allSections
|
|
.Select<Section, Widget>((Section section) => {
|
|
/*return new Column(
|
|
crossAxisAlignment: CrossAxisAlignment.stretch,
|
|
children: this._detailItemsFor(section).ToList()
|
|
);*/
|
|
return new Container(color: Color.lerp(section.leftColor, section.rightColor, 0.5f).withAlpha(127),
|
|
child: new SectionDetailView(detail: section)
|
|
);
|
|
}).ToList()
|
|
)
|
|
)
|
|
)
|
|
)
|
|
}
|
|
)
|
|
|
|
|
|
)
|
|
);
|
|
}
|
|
}
|
|
}
|