Link dblclick segmentable

src/Blazor.Diagrams.Core/Models/Base/BaseLinkModel.cs

@@ -14,6 +14,8 @@ public abstract class BaseLinkModel : SelectableModel, IHasBounds, ILinkable
     public event Action<BaseLinkModel, Anchor, Anchor>? SourceChanged;
     public event Action<BaseLinkModel, Anchor, Anchor>? TargetChanged;
     public event Action<BaseLinkModel>? TargetAttached;
+    public event Action<BaseLinkModel, LinkVertexModel>? VertexAdded;
+    public event Action<BaseLinkModel, LinkVertexModel>? VertexRemoved;
 
     protected BaseLinkModel(Anchor source, Anchor target)
     {
@@ -38,6 +40,7 @@ protected BaseLinkModel(string id, Anchor source, Anchor target) : base(id)
     public LinkMarker? SourceMarker { get; set; }
     public LinkMarker? TargetMarker { get; set; }
     public bool Segmentable { get; set; } = false;
+    public bool DoubleClickToSegment { get; set; } = false;
     public List<LinkVertexModel> Vertices { get; } = new();
     public List<LinkLabelModel> Labels { get; } = new();
     public IReadOnlyList<BaseLinkModel> Links => _links;
@@ -67,9 +70,27 @@ public LinkVertexModel AddVertex(Point? position = null)
     {
         var vertex = new LinkVertexModel(this, position);
         Vertices.Add(vertex);
+        VertexAdded?.Invoke(this, vertex);
+        Refresh();
         return vertex;
     }
 
+    public LinkVertexModel InsertVertex(Point? position, int index)
+    {
+        var vex = new LinkVertexModel(this, position);
+        Vertices.Insert(index, vex);
+        VertexAdded?.Invoke(this, vex);
+        Refresh();
+        return vex;
+    }
+
+    public void RemoveVertex(LinkVertexModel vertex)
+    {
+        Vertices.Remove(vertex);
+        VertexRemoved?.Invoke(this, vertex);
+        Refresh();
+    }
+
     public void SetSource(Anchor anchor)
     {
         ArgumentNullException.ThrowIfNull(anchor, nameof(anchor));

src/Blazor.Diagrams/Components/LinkWidget.razor.cs

@@ -27,20 +27,31 @@ private RenderFragment GetSelectionHelperPath(string color, string d, int index)
             builder.AddAttribute(8, "onmouseenter", EventCallback.Factory.Create<MouseEventArgs>(this, OnMouseEnter));
             builder.AddAttribute(9, "onmouseleave", EventCallback.Factory.Create<MouseEventArgs>(this, OnMouseLeave));
             builder.AddAttribute(10, "onpointerdown", EventCallback.Factory.Create<Microsoft.AspNetCore.Components.Web.PointerEventArgs>(this, e => OnPointerDown(e, index)));
-            builder.AddEventStopPropagationAttribute(11, "onpointerdown", Link.Segmentable);
+            builder.AddAttribute(10, "ondblclick", EventCallback.Factory.Create<Microsoft.AspNetCore.Components.Web.MouseEventArgs>(this, e => OnPointerDoubleClick(e, index)));
+            builder.AddEventStopPropagationAttribute(11, "onpointerdown", Link.Segmentable && !Link.DoubleClickToSegment);
+            builder.AddEventStopPropagationAttribute(11, "ondblclick", Link.Segmentable && Link.DoubleClickToSegment);
             builder.CloseElement();
         };
     }
 
     private void OnPointerDown(PointerEventArgs e, int index)
     {
-        if (!Link.Segmentable)
+        if (!Link.Segmentable || Link.DoubleClickToSegment)
             return;
 
         var vertex = CreateVertex(e.ClientX, e.ClientY, index);
         BlazorDiagram.TriggerPointerDown(vertex, e.ToCore());
     }
 
+    private void OnPointerDoubleClick(MouseEventArgs e, int index)
+    {
+        if (!Link.Segmentable || !Link.DoubleClickToSegment)
+            return;
+
+        var vertex = CreateVertex(e.ClientX, e.ClientY, index);
+        BlazorDiagram.TriggerPointerDoubleClick(vertex, e.ToCore());
+    }
+
     private void OnMouseEnter(MouseEventArgs e)
     {
         _hovered = true;
@@ -54,9 +65,7 @@ private void OnMouseLeave(MouseEventArgs e)
     private LinkVertexModel CreateVertex(double clientX, double clientY, int index)
     {
         var rPt = BlazorDiagram.GetRelativeMousePoint(clientX, clientY);
-        var vertex = new LinkVertexModel(Link, rPt);
-        Link.Vertices.Insert(index, vertex);
-        Link.Refresh();
+        var vertex = Link.InsertVertex(rPt, index);
         return vertex;
     }
 }

src/Blazor.Diagrams/Components/Renderers/LinkVertexRenderer.cs

@@ -89,7 +89,6 @@ private void OnPointerUp(PointerEventArgs e)
 
     private void OnDoubleClick(MouseEventArgs e)
     {
-        Vertex.Parent.Vertices.Remove(Vertex);
-        Vertex.Parent.Refresh();
+        Vertex.Parent.RemoveVertex(Vertex);
     }
 }