DiagramEditOperation.ChangeConnection Property

Identifies the ChangeConnection operation.

Declaration

static readonly ChangeConnection: string

Property Value

Type	Description
string	Returns “ChangeConnection”.

Remarks

The operation parameter returns the ChangeConnection value if the RequestEditOperation event fired for the following reasons:

• user is about to link or delink a connector from a shape,
• the ASPxDiagram control is updating a visibility state of a connection point.

Use the reason parameter to identify the reason why the event fired.

ASPX

<dx:ASPxDiagram ID="Diagram" runat="server" Width="100%" Height="600px">
    <ClientSideEvents RequestEditOperation="onRequestEditOperation" />
    ...

JS

function onRequestEditOperation(s, e) {
    if(e.operation === DiagramEditOperation.ChangeConnection) {
        var shapeType = e.args.shape && e.args.shape.type;
        if(shapeType === "root" && e.args.connectorPosition === "End") {
            if(e.reason !== DiagramRequestEditOperationReason.CheckUIElementAvailability)
                showWarning("The 'Development' shape cannot have an incoming connection.");
            e.allowed = false;
        }
    }
    ...
}

The RequestEditOperation event does not fire for the ChangeConnection operation if the AllowChangeConnection property is set to false.