Diagram.OnViewMouseEnter Method

Lets derived classes perform an action when the mouse pointer enters the diagram client view.

Namespace:  Microsoft.VisualStudio.Modeling.Diagrams
Assembly:  Microsoft.VisualStudio.Modeling.Sdk.Diagrams.10.0 (in Microsoft.VisualStudio.Modeling.Sdk.Diagrams.10.0.dll)

Syntax

'Declaration
Public Overridable Sub OnViewMouseEnter ( _
    pointArgs As DiagramPointEventArgs _
)

public virtual void OnViewMouseEnter(
    DiagramPointEventArgs pointArgs
)

public:
virtual void OnViewMouseEnter(
    DiagramPointEventArgs^ pointArgs
)

abstract OnViewMouseEnter : 
        pointArgs:DiagramPointEventArgs -> unit 
override OnViewMouseEnter : 
        pointArgs:DiagramPointEventArgs -> unit 

public function OnViewMouseEnter(
    pointArgs : DiagramPointEventArgs
)

Parameters

• pointArgs
  Type: Microsoft.VisualStudio.Modeling.Diagrams.DiagramPointEventArgs
  Event data. For a list of arguments, see DiagramPointEventArgs.

Examples

public override void OnViewMouseEnter(DslDiagrams::DiagramPointEventArgs pointArgs)
{
    if (pointArgs  == null) throw new global::System.ArgumentNullException("pointArgs");

    DslDiagrams::DiagramView activeView = this.ActiveDiagramView;
    if(activeView != null)
    {
        DslDiagrams::MouseAction action = null;
        if (activeView.SelectedToolboxItemSupportsFilterString(global::Microsoft.SequenceDiagramModel2.SequenceDiagramModel2ToolboxHelper.SyncMessageFilterString))
        {
            if (this.syncMessageConnectAction == null)
            {
                this.syncMessageConnectAction = new global::Microsoft.SequenceDiagramModel2.SyncMessageConnectAction(this);
                this.syncMessageConnectAction.MouseActionDeactivated += new DslDiagrams::MouseAction.MouseActionDeactivatedEventHandler(OnConnectActionDeactivated);
            }
            action = this.syncMessageConnectAction;
        } 
        else if (activeView.SelectedToolboxItemSupportsFilterString(global::Microsoft.SequenceDiagramModel2.SequenceDiagramModel2ToolboxHelper.CreateMessageFilterString))
        {
            if (this.createMessageConnectAction == null)
            {
                this.createMessageConnectAction = new global::Microsoft.SequenceDiagramModel2.CreateMessageConnectAction(this);
                this.createMessageConnectAction.MouseActionDeactivated += new DslDiagrams::MouseAction.MouseActionDeactivatedEventHandler(OnConnectActionDeactivated);
            }
            action = this.createMessageConnectAction;
        } 
        else if (activeView.SelectedToolboxItemSupportsFilterString(global::Microsoft.SequenceDiagramModel2.SequenceDiagramModel2ToolboxHelper.AsyncMessageFilterString))
        {
            if (this.asyncMessageConnectAction == null)
            {
                this.asyncMessageConnectAction = new global::Microsoft.SequenceDiagramModel2.AsyncMessageConnectAction(this);
                this.asyncMessageConnectAction.MouseActionDeactivated += new DslDiagrams::MouseAction.MouseActionDeactivatedEventHandler(OnConnectActionDeactivated);
            }
            action = this.asyncMessageConnectAction;
        } 
        else
        {
            action = null;
        }

        if (pointArgs.DiagramClientView.ActiveMouseAction != action)
        {
            pointArgs.DiagramClientView.ActiveMouseAction = action;
        }
    }
}

.NET Framework Security

• Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

See Also

Reference

Diagram Class

Microsoft.VisualStudio.Modeling.Diagrams Namespace