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[Sample] Add a Drag and Drop Sample
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‎Samples/UIWidgetSample/DragNDropSample.cs

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using System.Collections.Generic;
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using Unity.UIWidgets.animation;
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using Unity.UIWidgets.editor;
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using Unity.UIWidgets.foundation;
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using Unity.UIWidgets.material;
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using Unity.UIWidgets.painting;
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using Unity.UIWidgets.rendering;
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using Unity.UIWidgets.widgets;
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using UnityEditor;
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using UnityEngine;
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using Color = Unity.UIWidgets.ui.Color;
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using Transform = UnityEngine.Transform;
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namespace UIWidgetsSample {
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public class DragNDropSample : UIWidgetsEditorWindow {
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[MenuItem("UIWidgetsTests/Drag&Drop/DragNDropSample")]
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public static void ShowEditorWindow() {
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var window = GetWindow<DragNDropSample>();
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window.titleContent.text = "DragNDropSample";
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}
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protected override Widget createWidget() {
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Debug.Log("[ WIDGET CREATED ]");
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return new WidgetsApp(
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home: new DragNDropSampleWidget(),
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pageRouteBuilder: (RouteSettings settings, WidgetBuilder builder) =>
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new PageRouteBuilder(
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settings: settings,
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pageBuilder: (BuildContext context, Animation<float> animation,
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Animation<float> secondaryAnimation) => builder(context)
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)
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);
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}
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}
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public class DragNDropSampleWidget : StatefulWidget {
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public DragNDropSampleWidget(Key key = null) : base(key) {
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}
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public override State createState() {
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return new DragNDropSampleWidgetState();
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}
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}
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public class DragNDropSampleWidgetState : State<DragNDropSampleWidget> {
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readonly Color highlightColor = Color.fromARGB(255, 88, 127, 219);
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readonly Color defaultColor = Color.fromARGB(255, 211, 211, 211);
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readonly List<bool> isHighlighted = new List<bool> { };
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readonly List<Object[]> objects = new List<Object[]>();
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List<Widget> getUnityObjectDetectorList(int count) {
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if (this.isHighlighted.isEmpty()) {
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for (int i = 0; i < count; i++) {
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this.isHighlighted.Add(false);
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}
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}
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if (this.objects.isEmpty()) {
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for (int i = 0; i < count; i++) {
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this.objects.Add(null);
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}
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}
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List<Widget> widgetList = new List<Widget>();
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widgetList.Add(this.getGapBox("Use UnityObjectDetector"));
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for (int i = 0; i < count; i++) {
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var _i = i;
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Widget widget = new Container(
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decoration: this.isHighlighted[_i]
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? new BoxDecoration(color: this.highlightColor)
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: new BoxDecoration(color: this.defaultColor),
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height: 100f,
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child: new UnityObjectDetector(
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onEnter: () => {
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Debug.Log("Widget " + _i + " onEnter");
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this.setState(() => { this.isHighlighted[_i] = true; });
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},
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onRelease: (details) => {
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Debug.Log("Widget " + _i + " onRelease");
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this.setState(() => {
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this.isHighlighted[_i] = false;
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this.objects[_i] = details.objectReferences;
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});
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},
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onExit: () => {
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Debug.Log("Widget " + _i + " onExit");
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this.setState(() => { this.isHighlighted[_i] = false; });
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},
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child: new Center(
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child: new Text(this.objects[_i] != null
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? this.getNameString(this.objects[_i])
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: "[Drop/Multi-Drop Here]")
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)
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)
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);
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widgetList.Add(widget);
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if (_i != count - 1) {
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widgetList.Add(this.getGapBox());
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}
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}
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return widgetList;
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}
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string getNameString(Object[] objs) {
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var str = "";
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for (int i = 0; i < objs.Length; i++) {
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str += "[" + objs[i].name + "]";
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if (i != objs.Length - 1) {
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str += "\n";
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}
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}
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return str;
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}
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Widget getGapBox(string str = "") {
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return new Container(
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height: 25,
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child: str == ""
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? null
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: new Center(
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child: new Text(str)
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)
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);
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}
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Widget getSizedTableCell(string text) {
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return new Container(
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height: 20f,
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child: new Center(
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child: new Text(text)
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)
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);
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}
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bool highlight = false;
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Object[] objRef;
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bool isTransformDisplayHighlighted = false;
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Transform transformRef;
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public override Widget build(BuildContext context) {
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var columnList = new List<Widget>();
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columnList.AddRange(this.getUnityObjectDetectorList(2));
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columnList.AddRange(
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new List<Widget> {
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this.getGapBox("Use Listener"),
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new Container(
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decoration: this.highlight
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? new BoxDecoration(color: this.highlightColor)
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: new BoxDecoration(color: this.defaultColor),
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height: 100f,
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child: new Listener(
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onPointerDragFromEditorEnter: (evt) => {
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this.setState(() => { this.highlight = true; });
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},
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onPointerDragFromEditorExit: (evt) => {
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this.setState(() => { this.highlight = false; });
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},
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// onPointerDragFromEditorHover: (evt) => { },
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onPointerDragFromEditorRelease: (evt) => {
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this.objRef = evt.objectReferences;
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this.setState(() => { this.highlight = false; });
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},
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child: new Center(
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child: new Text(this.objRef != null
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? this.getNameString(this.objRef)
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: "[Drop/Multi-Drop Here]")
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)
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)
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)
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}
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);
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columnList.AddRange(
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new List<Widget>() {
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this.getGapBox("Sample: Display Transform"),
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new Container(
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decoration: this.isTransformDisplayHighlighted
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? new BoxDecoration(color: this.highlightColor)
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: new BoxDecoration(color: this.defaultColor),
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height: 100f,
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child: new UnityObjectDetector(
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onEnter: () => { this.setState(() => { this.isTransformDisplayHighlighted = true; }); },
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onRelease: (details) => {
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this.setState(() => {
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this.isTransformDisplayHighlighted = false;
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var gameObj = details.objectReferences[0] as GameObject;
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if (gameObj) {
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this.transformRef = gameObj.GetComponent<Transform>();
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}
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else {
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Debug.Log("Not a GameObject");
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}
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});
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},
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onExit: () => {
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Debug.Log("onExit");
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this.setState(() => { this.isTransformDisplayHighlighted = false; });
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},
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child: new Column(
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children: new List<Widget> {
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new Container(
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height: 20,
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child: new Center(
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child: new Text(this.transformRef == null
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? "[Drop a GameObject from scene here]"
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: this.transformRef.name
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)
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)
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),
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new Table(
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border: TableBorder.all(),
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children: new List<TableRow> {
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new TableRow(
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children: new List<Widget> {
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this.getSizedTableCell(""),
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this.getSizedTableCell("X"),
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this.getSizedTableCell("Y"),
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this.getSizedTableCell("Z")
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}
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),
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new TableRow(
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children: new List<Widget> {
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this.getSizedTableCell("Position"),
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this.getSizedTableCell(this.transformRef == null
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? ""
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: this.transformRef.position.x.ToString()),
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this.getSizedTableCell(this.transformRef == null
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? ""
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: this.transformRef.position.y.ToString()),
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this.getSizedTableCell(this.transformRef == null
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? ""
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: this.transformRef.position.z.ToString())
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}
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),
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new TableRow(
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children: new List<Widget> {
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this.getSizedTableCell("Rotation"),
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this.getSizedTableCell(this.transformRef == null
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? ""
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: this.transformRef.eulerAngles.x.ToString()),
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this.getSizedTableCell(this.transformRef == null
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? ""
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: this.transformRef.eulerAngles.y.ToString()),
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this.getSizedTableCell(this.transformRef == null
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? ""
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: this.transformRef.eulerAngles.z.ToString())
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}
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),
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new TableRow(
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children: new List<Widget> {
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this.getSizedTableCell("Scale"),
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this.getSizedTableCell(this.transformRef == null
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? ""
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: this.transformRef.localScale.x.ToString()),
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this.getSizedTableCell(this.transformRef == null
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? ""
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: this.transformRef.localScale.y.ToString()),
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this.getSizedTableCell(this.transformRef == null
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? ""
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: this.transformRef.localScale.z.ToString())
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}
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)
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}
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)
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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 new Container(
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padding: EdgeInsets.symmetric(horizontal: 25f),
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color: Colors.grey,
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child: new ListView(
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children: columnList
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));
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}
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}
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}

‎Samples/UIWidgetSample/DragNDropSample.cs.meta

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