awesome-uiwidgets/AwesomeUIWidgets/Assets/Packages/SGrid/widget/staggered_grid_view.cs

using System.Collections.Generic;
using Unity.UIWidgets.foundation;
using Unity.UIWidgets.painting;
using Unity.UIWidgets.widgets;

public class StaggeredGridView : BoxScrollView
{
    private StaggeredGridView(
        SliverStaggeredGridDelegate gridDelegate,
        SliverChildDelegate childrenDelegate,
        Key key,
        Axis scrollDirection,
        bool reverse,
        ScrollController controller,
        bool? primary,
        ScrollPhysics physics,
        bool shrinkWrap,
        EdgeInsetsGeometry padding
        // string  restorationId 
    ) : base(
        key: key,
        scrollDirection: scrollDirection,
        reverse: reverse,
        controller: controller,
        primary: primary,
        physics: physics,
        shrinkWrap: shrinkWrap,
        padding: padding
        // restorationId: restorationId
    )
    {
        this.gridDelegate = gridDelegate;
        this.childrenDelegate = childrenDelegate;
    }

    public static StaggeredGridView New(
        SliverStaggeredGridDelegate gridDelegate,
        Key key = null,
        Axis scrollDirection = Axis.vertical,
        bool reverse = false,
        ScrollController controller = null,
        bool? primary = null,
        ScrollPhysics physics = null,
        bool shrinkWrap = false,
        EdgeInsetsGeometry padding = null,
        bool addAutomaticKeepAlives = true,
        bool addRepaintBoundaries = true,
        List<Widget> children = null //public <Widget>[],
        // string  restorationId = null
    )
    {
        var childrenDelegate = new SliverChildListDelegate(
            children ?? new List<Widget>(),
            addAutomaticKeepAlives: addAutomaticKeepAlives,
            addRepaintBoundaries: addRepaintBoundaries
        );
        return new StaggeredGridView(
            gridDelegate: gridDelegate,
            childrenDelegate: childrenDelegate,
            key: key,
            scrollDirection: scrollDirection,
            reverse: reverse,
            controller: controller,
            primary: primary,
            physics: physics,
            shrinkWrap: shrinkWrap,
            padding: padding
            // restorationId: restorationId
        );
    }

    public static StaggeredGridView builder(
        SliverStaggeredGridDelegate gridDelegate,
        IndexedWidgetBuilder itemBuilder,
        Key key = null,
        Axis scrollDirection = Axis.vertical,
        bool reverse = false,
        ScrollController controller = null,
        bool? primary = null,
        ScrollPhysics physics = null,
        bool shrinkWrap = false,
        EdgeInsetsGeometry padding = null,
        int? itemCount = null,
        bool addAutomaticKeepAlives = true,
        bool addRepaintBoundaries = true,
        string restorationId = null
    )
    {
        var childrenDelegate = new SliverChildBuilderDelegate(
            itemBuilder,
            childCount: itemCount,
            addAutomaticKeepAlives: addAutomaticKeepAlives,
            addRepaintBoundaries: addRepaintBoundaries
        );
        return new StaggeredGridView(
            gridDelegate: gridDelegate,
            childrenDelegate: (SliverChildDelegate) childrenDelegate,
            key: key,
            scrollDirection: scrollDirection,
            reverse: reverse,
            controller: controller,
            primary: primary,
            physics: physics,
            shrinkWrap: shrinkWrap,
            padding: padding
            // restorationId: restorationId
        );
    }


    public StaggeredGridView custom(
        SliverStaggeredGridDelegate gridDelegate,
        SliverChildDelegate childrenDelegate,
        Key key = null,
        Axis scrollDirection = Axis.vertical,
        bool reverse = false,
        ScrollController controller = null,
        bool? primary = null,
        ScrollPhysics physics = null,
        bool shrinkWrap = false,
        EdgeInsetsGeometry padding = null
        // string restorationId = null
    )
    {
        return new StaggeredGridView(
            gridDelegate: gridDelegate,
            childrenDelegate: childrenDelegate,
            key: key,
            scrollDirection: scrollDirection,
            reverse: reverse,
            controller: controller,
            primary: primary,
            physics: physics,
            shrinkWrap: shrinkWrap,
            padding: padding
            // restorationId: restorationId,
        );
    }

    public static StaggeredGridView count(
        int crossAxisCount,
        Key key = null,
        Axis scrollDirection = Axis.vertical,
        bool reverse = false,
        ScrollController controller = null,
        bool? primary = null,
        ScrollPhysics physics = null,
        bool shrinkWrap = false,
        EdgeInsetsGeometry padding = null,
        float mainAxisSpacing = 0.0f,
        float crossAxisSpacing = 0.0f,
        bool addAutomaticKeepAlives = true,
        bool addRepaintBoundaries = true,
        List<Widget> children = null, // public <Widget>[],
        List<StaggeredTile> staggeredTiles = null // public <StaggeredTile>[],
        // String? restorationId,
    )
    {
        children = children ?? new List<Widget>();
        staggeredTiles = staggeredTiles ?? new List<StaggeredTile>();
        var gridDelegate = new SliverStaggeredGridDelegateWithFixedCrossAxisCount(
            crossAxisCount: crossAxisCount,
            mainAxisSpacing: mainAxisSpacing,
            crossAxisSpacing: crossAxisSpacing,
            staggeredTileBuilder: (i) => staggeredTiles[i],
            staggeredTileCount: staggeredTiles.Count
        );
        var childrenDelegate = new SliverChildListDelegate(
            children,
            addAutomaticKeepAlives: addAutomaticKeepAlives,
            addRepaintBoundaries: addRepaintBoundaries
        );

        return new StaggeredGridView(
            gridDelegate: gridDelegate,
            childrenDelegate: childrenDelegate,
            key: key,
            scrollDirection: scrollDirection,
            reverse: reverse,
            controller: controller,
            primary: primary,
            physics: physics,
            shrinkWrap: shrinkWrap,
            padding: padding
            // restorationId: restorationId,
        );
    }

    public static StaggeredGridView countBuilder(
        int crossAxisCount,
        IndexedWidgetBuilder itemBuilder,
        GridUtil.IndexedStaggeredTileBuilder staggeredTileBuilder,
        Key key = null,
        Axis scrollDirection = Axis.vertical,
        bool reverse = false,
        ScrollController controller = null,
        bool? primary = null,
        ScrollPhysics physics = null,
        bool shrinkWrap = false,
        EdgeInsetsGeometry padding = null,
        int? itemCount = null,
        float mainAxisSpacing = 0.0f,
        float crossAxisSpacing = 0.0f,
        bool addAutomaticKeepAlives = true,
        bool addRepaintBoundaries = true
        // String? restorationId,
    )
    {
        var gridDelegate = new SliverStaggeredGridDelegateWithFixedCrossAxisCount(
            crossAxisCount: crossAxisCount,
            mainAxisSpacing: mainAxisSpacing,
            crossAxisSpacing: crossAxisSpacing,
            staggeredTileBuilder: staggeredTileBuilder,
            staggeredTileCount: itemCount
        );
        var childrenDelegate = new SliverChildBuilderDelegate(
            itemBuilder,
            childCount: itemCount,
            addAutomaticKeepAlives: addAutomaticKeepAlives,
            addRepaintBoundaries: addRepaintBoundaries
        );
        return new StaggeredGridView(
            gridDelegate: gridDelegate,
            childrenDelegate: childrenDelegate,
            key: key,
            scrollDirection: scrollDirection,
            reverse: reverse,
            controller: controller,
            primary: primary,
            physics: physics,
            shrinkWrap: shrinkWrap,
            padding: padding
            // restorationId: restorationId,
        );
    }

    public static StaggeredGridView extent(
        float maxCrossAxisExtent,
        Key key = null,
        Axis scrollDirection = Axis.vertical,
        bool reverse = false,
        ScrollController controller = null,
        bool? primary = null,
        ScrollPhysics physics = null,
        bool shrinkWrap = false,
        EdgeInsetsGeometry padding = null,
        float mainAxisSpacing = 0.0f,
        float crossAxisSpacing = 0.0f,
        bool addAutomaticKeepAlives = true,
        bool addRepaintBoundaries = true,
        List<Widget> children = null, // public <Widget>[],
        List<StaggeredTile> staggeredTiles = null // public <StaggeredTile>[],
        // String? restorationId,
    )
    {
        var gridDelegate = new SliverStaggeredGridDelegateWithMaxCrossAxisExtent(
            maxCrossAxisExtent: maxCrossAxisExtent,
            mainAxisSpacing: mainAxisSpacing,
            crossAxisSpacing: crossAxisSpacing,
            staggeredTileBuilder: (i) => staggeredTiles[i],
            staggeredTileCount: staggeredTiles.Count
        );
        var childrenDelegate = new SliverChildListDelegate(
            children,
            addAutomaticKeepAlives: addAutomaticKeepAlives,
            addRepaintBoundaries: addRepaintBoundaries
        );
        return new StaggeredGridView(
            gridDelegate: gridDelegate,
            childrenDelegate: childrenDelegate,
            key: key,
            scrollDirection: scrollDirection,
            reverse: reverse,
            controller: controller,
            primary: primary,
            physics: physics,
            shrinkWrap: shrinkWrap,
            padding: padding
            // restorationId: restorationId,
        );
    }

    public static StaggeredGridView extentBuilder(
        float maxCrossAxisExtent,
        IndexedWidgetBuilder itemBuilder,
        GridUtil.IndexedStaggeredTileBuilder staggeredTileBuilder,
        Key key = null,
        Axis scrollDirection = Axis.vertical,
        bool reverse = false,
        ScrollController controller = null,
        bool? primary = null,
        ScrollPhysics physics = null,
        bool shrinkWrap = false,
        EdgeInsetsGeometry padding = null,
        int? itemCount = null,
        float mainAxisSpacing = 0.0f,
        float crossAxisSpacing = 0.0f,
        bool addAutomaticKeepAlives = true,
        bool addRepaintBoundaries = true
        // String? restorationId = null,
    )
    {
        var gridDelegate = new SliverStaggeredGridDelegateWithMaxCrossAxisExtent(
            maxCrossAxisExtent: maxCrossAxisExtent,
            mainAxisSpacing: mainAxisSpacing,
            crossAxisSpacing: crossAxisSpacing,
            staggeredTileBuilder: staggeredTileBuilder,
            staggeredTileCount: itemCount
        );
        var childrenDelegate = new SliverChildBuilderDelegate(
            itemBuilder,
            childCount: itemCount,
            addAutomaticKeepAlives: addAutomaticKeepAlives,
            addRepaintBoundaries: addRepaintBoundaries
        );
        return new StaggeredGridView(
            gridDelegate: gridDelegate,
            childrenDelegate: childrenDelegate,
            key: key,
            scrollDirection: scrollDirection,
            reverse: reverse,
            controller: controller,
            primary: primary,
            physics: physics,
            shrinkWrap: shrinkWrap,
            padding: padding
            // restorationId: restorationId,
        );
    }

    public readonly SliverStaggeredGridDelegate gridDelegate;

    public readonly SliverChildDelegate childrenDelegate;

    protected override Widget buildChildLayout(BuildContext context)
    {
        return new SliverStaggeredGrid(
            Delegate: childrenDelegate,
            gridDelegate: gridDelegate
        );
    }
}