Category / Section
How do I create a custom symbol?
1 min read
The following code sample demonstrates how you can create a custom symbol and use it in Essential Diagram:
1. Create the custom symbol:
[C#]
//Custom Symbol (MySymbol.cs) public class MySymbol : Symbol { private Syncfusion.Windows.Forms.Diagram.Rectangle outerRect = null; private Ellipse innerEllipse = null;
public MySymbol() { ////////////////////////////////////////////////////////////////// // Add child nodes to the symbol programmatically //////////////////////////////////////////////////////////////////
// Add an outer rectangle this.outerRect = new Syncfusion.Windows.Forms.Diagram.Rectangle(0, 0, 120, 80); this.outerRect.Name = "Rectangle"; this.outerRect.FillStyle.Color = Color.Khaki; this.AppendChild(outerRect);
// Add an inner ellipse this.innerEllipse = new Ellipse(10, 10, 100, 60); this.innerEllipse.Name = "Ellipse"; this.AppendChild(innerEllipse); //Add Label Label lbl = this.AddLabel("My Symbol", BoxPosition.Center); lbl.BackgroundStyle.Color = Color.Transparent; } }
[VB.NET]
'Custom Symbol (MySymbol.vb) Public Class MySymbol Inherits Symbol Private outerRect As Syncfusion.Windows.Forms.Diagram.Rectangle = Nothing Private innerEllipse As Ellipse = Nothing Public Sub New() ' Add child nodes to the symbol programmatically ' Add an outer rectangle Me.outerRect = New Syncfusion.Windows.Forms.Diagram.Rectangle(0, 0, 120, 80) Me.outerRect.Name = "Rectangle" Me.outerRect.FillStyle.Color = Color.Khaki Me.AppendChild(outerRect) ' Add an inner ellipse Me.innerEllipse = New Ellipse(10, 10, 100, 60) Me.innerEllipse.Name = "Ellipse" Me.AppendChild(innerEllipse) 'Add Label Dim lbl As Label = Me.AddLabel("My Symbol", BoxPosition.Center) lbl.BackgroundStyle.Color = Color.Transparent End Sub 'New End Class 'MySymbol
2. Using the symbol in the form:
[C#]
//Register InsertTool for MySymbol this.diagram1.Controller.RegisterTool(new InsertSymbolTool("InsertMySymbol", typeof(MySymbol)));
//Activate InsertTool for MySymbol this.diagram1.ActivateTool("InsertMySymbol");
[VB.NET]
'Register InsertTool for MySymbol Me.diagram1.Controller.RegisterTool(New InsertSymbolTool("InsertMySymbol", GetType(MySymbol)))
'Activate InsertTool for MySymbol Me.diagram1.ActivateTool("InsertMySymbol")
