WorkflowView.AddDesignerMessageFilter(WorkflowDesignerMessageFilter) 메서드

정의

네임스페이스:

System.Workflow.ComponentModel.Design

어셈블리:

System.Workflow.ComponentModel.dll

WorkflowDesignerMessageFilter에 WorkflowView를 추가합니다.

public:
 void AddDesignerMessageFilter(System::Workflow::ComponentModel::Design::WorkflowDesignerMessageFilter ^ designerMessageFilter);

public void AddDesignerMessageFilter (System.Workflow.ComponentModel.Design.WorkflowDesignerMessageFilter designerMessageFilter);

member this.AddDesignerMessageFilter : System.Workflow.ComponentModel.Design.WorkflowDesignerMessageFilter -> unit

Public Sub AddDesignerMessageFilter (designerMessageFilter As WorkflowDesignerMessageFilter)

매개 변수

designerMessageFilter

WorkflowDesignerMessageFilter

WorkflowDesignerMessageFilter에 추가할 WorkflowView입니다.

예제

다음 예제에서는 WorkflowDesignerLoader가 만들어지고 WorkflowView 개체가 워크플로 디자인 화면과 연결됩니다. 메시지 알림을 검색하기 위해 WorkflowDesignerMessageFilter가 만들어지고 WorkflowView 개체에 추가됩니다.

이 코드 예제는 WorkflowViewWrapper.cs 파일에 있는 Outlook Workflow Wizard SDK 샘플의 일부입니다. 자세한 내용은 Outlook Workflow Wizard 샘플합니다.

public WorkflowViewWrapper()
{
    this.loader = new Loader();

    // Create a Workflow Design Surface
    this.surface = new DesignSurface();
    this.surface.BeginLoad(this.loader);

    // Get the Workflow Designer Host
    this.Host = this.surface.GetService(typeof(IDesignerHost)) as IDesignerHost;

    if (this.Host == null)
        return;

    // Create a Sequential Workflow by using the Workflow Designer Host
    SequentialWorkflow = (SequentialWorkflowActivity)Host.CreateComponent(typeof(SequentialWorkflowActivity));
    SequentialWorkflow.Name = "CustomOutlookWorkflow";

    // Create a Workflow View on the Workflow Design Surface
    this.workflowView = new WorkflowView(this.surface as IServiceProvider);

    // Add a message filter to the workflow view, to support panning
    MessageFilter filter = new MessageFilter(this.surface as IServiceProvider, this.workflowView);
    this.workflowView.AddDesignerMessageFilter(filter);

    // Activate the Workflow View
    this.Host.Activate();

    this.workflowView.Dock = DockStyle.Fill;
    this.Controls.Add(workflowView);
    this.Dock = DockStyle.Fill;
}

Public Sub New()

    Me.loaderValue = New Loader()

    ' Create a Workflow Design Surface
    Me.surface = New DesignSurface()
    Me.surface.BeginLoad(Me.loaderValue)

    ' Get the Workflow Designer Host
    If Me.surface.GetService(GetType(IDesignerHost)) IsNot Nothing AndAlso TypeOf Me.surface.GetService(GetType(IDesignerHost)) Is IDesignerHost Then
        Me.Host = CType(Me.surface.GetService(GetType(IDesignerHost)), IDesignerHost)
    Else
        Return
    End If

    ' Create a Sequential Workflow by using the Workflow Designer Host
    SequentialWorkflow = CType(Host.CreateComponent(GetType(SequentialWorkflowActivity)), SequentialWorkflowActivity)
    SequentialWorkflow.Name = "CustomOutlookWorkflow"

    ' Create a Workflow View on the Workflow Design Surface
    Me.workflowView = New WorkflowView(CType(Me.surface, IServiceProvider))

    ' Add a message filter to the workflow view, to support panning
    Dim filter As MessageFilter = New MessageFilter(CType(Me.surface, IServiceProvider), Me.workflowView)
    Me.workflowView.AddDesignerMessageFilter(filter)

    ' Activate the Workflow View
    Me.Host.Activate()

    Me.workflowView.Dock = DockStyle.Fill
    Me.Controls.Add(workflowView)
    Me.Dock = DockStyle.Fill
End Sub

이전 코드에서 만든 MessageFilter 개체는 WorkflowDesignerMessageFilter 클래스에서 파생됩니다. 이 클래스의 메서드를 재정의하면 WorkflowView 개체에서 사용자 인터페이스 이벤트가 발생할 때마다 메시지 필터에 알립니다.

internal sealed class MessageFilter : WorkflowDesignerMessageFilter
{
    private bool mouseDown;
    private IServiceProvider serviceProvider;
    private WorkflowView workflowView;

    public MessageFilter(IServiceProvider provider, WorkflowView view)
    {
        this.serviceProvider = provider;
        this.workflowView = view;
    }

    protected override bool OnMouseDown(MouseEventArgs eventArgs)
    {
        // Allow other components to process this event by not returning true.
        this.mouseDown = true;
        return false;
    }
    protected override bool OnMouseMove(MouseEventArgs eventArgs)
    {
        // Allow other components to process this event by not returning true.
        if (this.mouseDown)
        {
            this.workflowView.ScrollPosition = new Point(eventArgs.X, eventArgs.Y);
        }
        return false;
    }
    protected override bool OnMouseUp(MouseEventArgs eventArgs)
    {
        // Allow other components to process this event by not returning true.
        this.mouseDown = false;
        return false;
    }

    protected override bool OnMouseDoubleClick(MouseEventArgs eventArgs)
    {
        this.mouseDown = false;
        return true;
    }

    protected override bool OnMouseEnter(MouseEventArgs eventArgs)
    {
        // Allow other components to process this event by not returning true.
        this.mouseDown = false;
        return false;
    }

    protected override bool OnMouseHover(MouseEventArgs eventArgs)
    {
        // Allow other components to process this event by not returning true.
        this.mouseDown = false;
        return false;
    }

    protected override bool OnMouseLeave()
    {
        // Allow other components to process this event by not returning true.
        this.mouseDown = false;
        return false;
    }

    protected override bool OnMouseWheel(MouseEventArgs eventArgs)
    {
        this.mouseDown = false;
        return true;
    }

    protected override bool OnMouseCaptureChanged()
    {
        // Allow other components to process this event by not returning true.
        this.mouseDown = false;
        return false;
    }

    protected override bool OnDragEnter(DragEventArgs eventArgs)
    {
        return true;
    }

    protected override bool OnDragOver(DragEventArgs eventArgs)
    {
        return true;
    }

    protected override bool OnDragLeave()
    {
        return true;
    }

    protected override bool OnDragDrop(DragEventArgs eventArgs)
    {
        return true;
    }

    protected override bool OnGiveFeedback(GiveFeedbackEventArgs gfbevent)
    {
        return true;
    }

    protected override bool OnQueryContinueDrag(QueryContinueDragEventArgs qcdevent)
    {
        return true;
    }

    protected override bool OnKeyUp(KeyEventArgs eventArgs)
    {
        return true;
    }

    protected override bool OnShowContextMenu(Point menuPoint)
    {
        return true;
    }

    protected override bool OnKeyDown(KeyEventArgs eventArgs)
    {
        if (eventArgs.KeyCode == Keys.Delete)
        {
            ISelectionService selectionService = (ISelectionService)this.serviceProvider.GetService(typeof(ISelectionService));
            if (selectionService != null && selectionService.PrimarySelection is CodeActivity)
            {
                CodeActivity codeActivityComponent = (CodeActivity)selectionService.PrimarySelection;
                CompositeActivity parentActivity = codeActivityComponent.Parent;
                if (parentActivity != null)
                {
                    parentActivity.Activities.Remove(codeActivityComponent);
                    this.ParentView.Update();
                }
            }
        }
        return true;
    }
}

Friend Class MessageFilter
    Inherits WorkflowDesignerMessageFilter

    Private mouseDown As Boolean
    Private serviceProvider As IServiceProvider
    Private workflowView As WorkflowView

    Public Sub New(ByVal provider As IServiceProvider, ByVal view As WorkflowView)
        Me.serviceProvider = provider
        Me.workflowView = view
    End Sub

    Protected Overrides Function OnMouseDown(ByVal eventArgs As System.Windows.Forms.MouseEventArgs) As Boolean
        ' Allow other components to process this event by not returning true.
        Me.mouseDown = True
        Return False
    End Function
    Protected Overrides Function OnMouseMove(ByVal eventArgs As System.Windows.Forms.MouseEventArgs) As Boolean
        ' Allow other components to process this event by not returning true.
        If (Me.mouseDown) Then
            Me.workflowView.ScrollPosition = New Point(eventArgs.X, eventArgs.Y)
        End If
        Return False
    End Function
    Protected Overrides Function OnMouseUp(ByVal eventArgs As System.Windows.Forms.MouseEventArgs) As Boolean
        ' Allow other components to process this event by not returning true.
        Me.mouseDown = False
        Return False
    End Function

    Protected Overrides Function OnMouseDoubleClick(ByVal eventArgs As System.Windows.Forms.MouseEventArgs) As Boolean
        Me.mouseDown = False
        Return True
    End Function

    Protected Overrides Function OnMouseEnter(ByVal eventArgs As System.Windows.Forms.MouseEventArgs) As Boolean
        ' Allow other components to process this event by not returning true.
        Me.mouseDown = False
        Return False
    End Function

    Protected Overrides Function OnMouseHover(ByVal eventArgs As System.Windows.Forms.MouseEventArgs) As Boolean
        ' Allow other components to process this event by not returning true.
        Me.mouseDown = False
        Return False
    End Function

    Protected Overrides Function OnMouseLeave() As Boolean
        ' Allow other components to process this event by not returning true.
        Me.mouseDown = False
        Return False
    End Function

    Protected Overrides Function OnMouseWheel(ByVal eventArgs As System.Windows.Forms.MouseEventArgs) As Boolean
        Me.mouseDown = False
        Return True
    End Function

    Protected Overrides Function OnMouseCaptureChanged() As Boolean
        ' Allow other components to process this event by not returning true.
        Me.mouseDown = False
        Return False
    End Function

    Protected Overrides Function OnDragEnter(ByVal eventArgs As System.Windows.Forms.DragEventArgs) As Boolean
        Return True
    End Function

    Protected Overrides Function OnDragOver(ByVal eventArgs As System.Windows.Forms.DragEventArgs) As Boolean
        Return True
    End Function

    Protected Overrides Function OnDragLeave() As Boolean
        Return True
    End Function

    Protected Overrides Function OnDragDrop(ByVal eventArgs As System.Windows.Forms.DragEventArgs) As Boolean
        Return True
    End Function

    Protected Overrides Function OnGiveFeedback(ByVal eventArgs As System.Windows.Forms.GiveFeedbackEventArgs) As Boolean
        Return True
    End Function

    Protected Overrides Function OnQueryContinueDrag(ByVal eventArgs As System.Windows.Forms.QueryContinueDragEventArgs) As Boolean
        Return True
    End Function

    Protected Overrides Function OnKeyUp(ByVal eventArgs As System.Windows.Forms.KeyEventArgs) As Boolean
        Return True
    End Function

    Protected Overrides Function OnShowContextMenu(ByVal screenMenuPoint As System.Drawing.Point) As Boolean
        Return True
    End Function

    Protected Overrides Function OnKeyDown(ByVal eventArgs As System.Windows.Forms.KeyEventArgs) As Boolean
        If eventArgs.KeyCode = Keys.Delete Then
            Dim selectionService As ISelectionService = CType(Me.serviceProvider.GetService(GetType(ISelectionService)), ISelectionService)
            If selectionService IsNot Nothing AndAlso TypeOf selectionService.PrimarySelection Is CodeActivity Then
                Dim codeActivityComponent As CodeActivity = CType(selectionService.PrimarySelection, CodeActivity)
                Dim parentActivity As CompositeActivity = codeActivityComponent.Parent
                If parentActivity IsNot Nothing Then
                    parentActivity.Activities.Remove(codeActivityComponent)
                    Me.ParentView.Update()
                End If
            End If
        End If
        Return True
    End Function
End Class

설명

WorkflowDesignerMessageFilter는 WorkflowView로부터의 메시지를 처리하는 구성 요소입니다.

Strategy 디자인 패턴을 사용하면 WorkflowView가 WorkflowDesignerMessageFilter로 처리할 메시지를 전달합니다.

마우스 이벤트, 키보드 이벤트, paint 및 레이아웃 이벤트는 WorkflowDesignerMessageFilter와 연결된 WorkflowView로 전달됩니다.