Class DiagramEvents

It is used to defines the diagram events.

Inheritance
System.Object
Syncfusion.Blazor.SfBaseComponent
Syncfusion.Blazor.SfBaseExtension
DiagramEvents
Namespace: Syncfusion.Blazor.Diagrams
Assembly: Syncfusion.Blazor.dll
Syntax
public class DiagramEvents : SfBaseExtension

Constructors

DiagramEvents()

Declaration
public DiagramEvents()

Properties

Clicked

Triggers when a node, connector or diagram is clicked

Declaration
public EventCallback<IBlazorClickEventArgs> Clicked { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorClickEventArgs>

ContextMenuItemClicked

Triggers when a context menu item is clicked

Declaration
public EventCallback<DiagramMenuEventArgs> ContextMenuItemClicked { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<DiagramMenuEventArgs>

Created

Triggered when the diagram is rendered completely.

Declaration
public EventCallback<object> Created { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<System.Object>

CustomHistoryChanged

Triggers when a custom entry change is reverted or restored(undo/redo)

Declaration
public EventCallback<IBlazorCustomHistoryChangeArgs> CustomHistoryChanged { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorCustomHistoryChangeArgs>

DragEnter

Triggers when a symbol is dragged into diagram from symbol palette

Declaration
public EventCallback<IBlazorDragEnterEventArgs> DragEnter { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorDragEnterEventArgs>

DragLeave

Triggers when a symbol is dragged outside of the diagram.

Declaration
public EventCallback<IBlazorDragLeaveEventArgs> DragLeave { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorDragLeaveEventArgs>

FixedUserHandleClick

Triggers when a Fixed User Handle item is clicked

Declaration
public EventCallback<FixedUserHandleClickEventArgs> FixedUserHandleClick { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<FixedUserHandleClickEventArgs>

HistoryChanged

Triggers when a change is reverted or restored(undo/redo)

Declaration
public EventCallback<IBlazorHistoryChangeArgs> HistoryChanged { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorHistoryChangeArgs>

mainParent

Declaration
protected override SfBaseExtension mainParent { get; set; }
Property Value
Type Description
Syncfusion.Blazor.SfBaseExtension
Overrides
Syncfusion.Blazor.SfBaseExtension.mainParent

MouseEnter

Triggered when mouse enters a node/connector.

Declaration
public EventCallback<IBlazorMouseEventArgs> MouseEnter { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorMouseEventArgs>

MouseLeave

Triggered when mouse leaves node/connector.

Declaration
public EventCallback<IBlazorMouseEventArgs> MouseLeave { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorMouseEventArgs>

OnCommandExecuted

Triggers when a command executed.

Declaration
public EventCallback<ICommandExecuteEventArgs> OnCommandExecuted { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<ICommandExecuteEventArgs>

OnConnectionChange

Triggers when the connection is changed

Declaration
public EventCallback<IBlazorConnectionChangeEventArgs> OnConnectionChange { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorConnectionChangeEventArgs>

OnContextMenuOpen

Triggers before opening the context menu

Declaration
public EventCallback<DiagramBeforeMenuOpenEventArgs> OnContextMenuOpen { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<DiagramBeforeMenuOpenEventArgs>

OnDoubleClick

Triggers when a node, connector or diagram model is clicked twice

Declaration
public EventCallback<IBlazorDoubleClickEventArgs> OnDoubleClick { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorDoubleClickEventArgs>

OnDrop

Triggers when a symbol is dragged and dropped from symbol palette to drawing area

Declaration
public EventCallback<IBlazorDropEventArgs> OnDrop { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorDropEventArgs>

OnKeyDown

Triggers when a user is pressing a key.

Declaration
public EventCallback<IKeyEventArgs> OnKeyDown { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IKeyEventArgs>

OnKeyUp

Triggers when a user releases a key.

Declaration
public EventCallback<IKeyEventArgs> OnKeyUp { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IKeyEventArgs>

OnPositionChange

Triggers while dragging the elements in diagram

Declaration
public EventCallback<IBlazorDraggingEventArgs> OnPositionChange { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorDraggingEventArgs>

OnRotateChange

Triggers when the diagram elements are rotated

Declaration
public EventCallback<IRotationEventArgs> OnRotateChange { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IRotationEventArgs>

OnSizeChange

Triggers when a node is resized

Declaration
public EventCallback<ISizeChangeEventArgs> OnSizeChange { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<ISizeChangeEventArgs>

OnUserHandleMouseDown

Triggers when a mouseDown on the user handle.

Declaration
public EventCallback<UserHandleEventsArgs> OnUserHandleMouseDown { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<UserHandleEventsArgs>

OnUserHandleMouseEnter

Triggers when a mouseEnter on the user handle.

Declaration
public EventCallback<UserHandleEventsArgs> OnUserHandleMouseEnter { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<UserHandleEventsArgs>

OnUserHandleMouseLeave

Triggers when a mouseLeave on the user handle.

Declaration
public EventCallback<UserHandleEventsArgs> OnUserHandleMouseLeave { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<UserHandleEventsArgs>

OnUserHandleMouseUp

Triggers when a mouseUp on the user handle.

Declaration
public EventCallback<UserHandleEventsArgs> OnUserHandleMouseUp { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<UserHandleEventsArgs>

PropertyChanged

Triggers once the node or connector property changed.

Declaration
public EventCallback<IBlazorPropertyChangeEventArgs> PropertyChanged { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorPropertyChangeEventArgs>

SelectionChanged

Triggers when the selection is changed in diagram

Declaration
public EventCallback<IBlazorSelectionChangeEventArgs> SelectionChanged { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorSelectionChangeEventArgs>

TextEdited

Triggers when editor got focus at the time of node’s label or text node editing.

Declaration
public EventCallback<IBlazorTextEditEventArgs> TextEdited { get; set; }
Property Value
Type Description
Microsoft.AspNetCore.Components.EventCallback<IBlazorTextEditEventArgs>

Methods

BuildRenderTree(RenderTreeBuilder)

Declaration
protected override void BuildRenderTree(RenderTreeBuilder __builder)
Parameters
Type Name Description
Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder __builder

OnInitializedAsync()

Declaration
protected override Task OnInitializedAsync()
Returns
Type Description
System.Threading.Tasks.Task

Returns asynchronous operation when the component is ready to start, having received its initial parameters from its parent in the render tree
Overrides
Syncfusion.Blazor.SfBaseComponent.OnInitializedAsync()