Class DiagramBeforeMenuOpenEventArgs

Triggers before opening the context menu.

Inheritance

System.Object

DiagramBeforeMenuOpenEventArgs

Implements

System.IEquatable<DiagramBeforeMenuOpenEventArgs>

Namespace: Syncfusion.Blazor.Diagrams

Assembly: Syncfusion.Blazor.dll

Syntax

public class DiagramBeforeMenuOpenEventArgs : Object, IEquatable<DiagramBeforeMenuOpenEventArgs>

Examples

<SfDiagram Height="600px" Nodes="@NodeCollection" Constraints="@DiagramConstraints">
   <DiagramEvents OnContextMenuOpen = "Open" ></ DiagramEvents >
   < DiagramContextMenuSettings Show="true" Items="@ContextMenuItemModels" ShowCustomMenuOnly="true">
   </DiagramContextMenuSettings>
</SfDiagram>
@code
{
   //Defines diagram's nodes collection
   public ObservableCollection<DiagramNode> NodeCollection = new ObservableCollection<DiagramNode>();
   public DiagramConstraints DiagramConstraints = DiagramConstraints.Default;
   public void Open(DiagramBeforeMenuOpenEventArgs args)
   {
       args.Cancel = true;
       if ((args != null) && (args.Element != null) && (args.Event != null) && (args.Items != null))
       {
           Console.WriteLine("MenuOpen");
       }
   }
   protected override void OnInitialized()
   {
       //Create a node
       DiagramNode Node = new DiagramNode()
       {
           OffsetX = 100,
           OffsetY = 100,
           Height = 100,
           Width = 100,
           Id = "node1",
           Shape = new DiagramShape() { Type = Syncfusion.Blazor.Diagrams.Shapes.Basic, BasicShape = BasicShapes.Ellipse },
           Style = new NodeShapeStyle()
           {
               Fill = "#6BA5D7",
               StrokeColor = "#6BA5D7",
           },
       };
       //Add node into node's collection
       NodeCollection.Add(Node);
   }
   // Add the custom context menu items
   List<ContextMenuItemModel> ContextMenuItemModels = new List<ContextMenuItemModel>()
   {
       new ContextMenuItemModel()
       {
           Text ="color",
           Id="Save",
           Target =".e-elementcontent1",
           // Add the nested custom context menu items
           Items = new List<ContextMenuItemModel>()
           {
               new ContextMenuItemModel(){  Text ="Red", Id="Red"},
               new ContextMenuItemModel(){  Text ="Yellow", Id="Yellow"},
               new ContextMenuItemModel(){  Text ="Green", Id="Green" }
           }
       },
   };
}

Constructors

DiagramBeforeMenuOpenEventArgs()

Declaration

public DiagramBeforeMenuOpenEventArgs()

Properties

Cancel

Defines whether the user can prevent the context menu opening.

Declaration

public bool Cancel { get; set; }

Property Value

Type	Description
System.Boolean

Element

Returns which element has been clicked.

Declaration

public DOM Element { get; set; }

Property Value

Type	Description
DOM

Event

Returns event arguments.

Declaration

public EventArgs Event { get; set; }

Property Value

Type	Description
System.EventArgs

HiddenItems

Returns the array of hidden context menu items.

Declaration

public List<string> HiddenItems { get; set; }

Property Value

Type	Description
System.Collections.Generic.List<System.String>

Items

Return the context menu items.

Declaration

public List<ContextMenuItemModel> Items { get; set; }

Property Value

Type	Description
System.Collections.Generic.List<ContextMenuItemModel>

Left

Returns the left position value of the clicked menu item.

Declaration

public double Left { get; set; }

Property Value

Type	Description
System.Double

Name

Returns the name of the event.

Declaration

public string Name { get; set; }

Property Value

Type	Description
System.String

ParentItem

Returns the parent menu items if the sub-menu opens.

Declaration

public ContextMenuItemModel ParentItem { get; set; }

Property Value

Type	Description
ContextMenuItemModel

Top

Returns the top position value of the clicked menu item.

Declaration

public double Top { get; set; }

Property Value

Type	Description
System.Double

Methods

Equals(DiagramBeforeMenuOpenEventArgs)

Indicates whether the DiagramBeforeMenuOpenEventArgs object is equal to another object of the same type.

Declaration

public bool Equals(DiagramBeforeMenuOpenEventArgs diagramBeforeMenuOpenEventArgs)

Parameters

Type	Name	Description
DiagramBeforeMenuOpenEventArgs	diagramBeforeMenuOpenEventArgs	Triggers before opening the context menu.

Returns

Type	Description
System.Boolean	Returns the event before opening the context menu

Implements

System.IEquatable<>