port from perforce

intromat/Intromat/Nodes/Code/FloatLiteralNode.cs

@@ -0,0 +1,66 @@
+using System;
+using System.Reactive.Linq;
+using DynamicData;
+using Intromat.Model.Compiler;
+using Intromat.PersistentModel;
+using Intromat.ViewModels;
+using Intromat.ViewModels.Editors;
+using Intromat.ViewModels.Previews;
+using Intromat.Views;
+using NodeNetwork.Toolkit.ValueNode;
+using ReactiveUI;
+using Splat;
+
+namespace Intromat.Nodes.Code
+{
+    public class FloatLiteralNode : CodeGenNodeViewModel
+    {
+        static FloatLiteralNode()
+        {
+            Locator.CurrentMutable.Register(() => new CodeGenNodeView(), typeof(IViewFor<FloatLiteralNode>));
+        }
+
+        public FloatLiteralNode() : base(NodeType.Literal)
+        {
+            Name = "Float";
+
+            Output = new CodeGenOutputViewModel<ITypedExpression<float>>(EPortType.Float)
+            {
+                Name = "Value",
+                Editor = ValueEditor,
+                Value = ValueEditor.ValueChanged.Select(v => new FloatLiteralValue { Value = v })
+            };
+            Outputs.Add(Output);
+
+            var stringPreview = new StringPreviewViewModel();
+            Preview = stringPreview;
+
+            this.WhenAnyValue(vm => vm.Output.CurrentValue)
+                .Where(v => v != null)
+                .Subscribe(_ => stringPreview.Value = Output.CurrentValue.PreviewValue ?? "0.0");
+        }
+
+        public FloatValueEditorViewModel ValueEditor { get; } = new();
+
+        public ValueNodeOutputViewModel<ITypedExpression<float>> Output { get; }
+
+        public override NodeModelBase CreateModel()
+        {
+            return new FloatLiteralModel();
+        }
+
+        public override void LoadModel(NodeModelBase model)
+        {
+            base.LoadModel(model);
+            var floatLiteral = (FloatLiteralModel)model;
+            ValueEditor.Value = floatLiteral.Value;
+        }
+
+        public override void SaveModel(NodeModelBase model)
+        {
+            base.SaveModel(model);
+            var floatLiteral = (FloatLiteralModel)model;
+            floatLiteral.Value = ValueEditor.Value;
+        }
+    }
+}