Class DiagramMenuOpeningEventArgs

Represents event arguments for the SfDiagramComponent context menu opening event.

Inheritance

System.Object

DiagramMenuOpeningEventArgs

Namespace: Syncfusion.Blazor.Diagram

Assembly: Syncfusion.Blazor.dll

Syntax

public class DiagramMenuOpeningEventArgs : Object

Remarks

This class provides data for the context menu opening event, allowing customization of menu items before the context menu is displayed to the user.

Examples

<SfDiagramComponent @ref="diagram" Height="600px" Width="90%">
<ContextMenuSettings @bind-Show="@show"
                    @bind-ShowCustomMenuOnly="customMenuOnly" 
                    @bind-Items="@Items" 
                    ContextMenuOpening="@BeforeOpen" 
                    ContextMenuItemClicked="@ItemClicked"> 
</ContextMenuSettings>
</SfDiagramComponent>
@code {
SfDiagramComponent diagram;
ContextMenuSettings ContextMenuSettings;
List<ContextMenuItem> Items;
bool customMenuOnly = false;
bool show = true;

protected override void OnInitialized()
{
   nodes = new DiagramObjectCollection<Node>();
   connectors = new DiagramObjectCollection<Connector>();

   Items = new List<ContextMenuItem>()
   {
           new ContextMenuItem()
           {
               Text = "Save As...",
               Id = "save",
               //IconCss = "glyphicon glyphicon-pencil",
           },
           new ContextMenuItem()
           {
               Text = "Group",
               Id = "load",
               //IconCss = "e-save"
           }
   };
}
private void BeforeOpen(DiagramBeforeMenuOpenEventArgs args)
{
   foreach (ContextMenuItem Item in args.Items)
   {
       if (Item.Text == "Groups")
       {
           args.HiddenItems.Add(Item.Id);
       }
   }
}
private void ItemClicked(DiagramMenuEventArgs args)
{
   if (args.Item.Text == "Group")
   {
       diagram.SelectAll();
       diagram.Group();
   }
}

Constructors

DiagramMenuOpeningEventArgs()

Declaration

public DiagramMenuOpeningEventArgs()

Properties

Cancel

Gets or sets a value indicating whether the context menu opening can be prevented.

Declaration

public bool Cancel { get; set; }

Property Value

Type	Description
System.Boolean	A System.Boolean indicating whether to cancel the menu opening operation. The default value is false.

Remarks

Set this property to true to prevent the context menu from being displayed to the user.

HiddenItems

Gets or sets the collection of hidden items associated with the context menu.

Declaration

public List<string> HiddenItems { get; }

Property Value

Type	Description
System.Collections.Generic.List<System.String>	A System.Collections.Generic.List<> of System.String containing the identifiers of menu items to be hidden. The default value is null.

Remarks

Use this property to specify which menu items should not be displayed in the context menu by providing their string identifiers.

Items

Gets or sets the collection of menu items available in the context menu.

Declaration

public List<ContextMenuItem> Items { get; }

Property Value

Type	Description
System.Collections.Generic.List<ContextMenuItem>	A System.Collections.Generic.List<> of ContextMenuItem representing the available menu items. The default value is null.

Remarks

This property provides access to the collection of context menu items that can be customized or modified before the menu is displayed.