ChangingWindowLevel Event

'Declaration
 
Public Event ChangingWindowLevel As EventHandler(Of MedicalViewerChangingWindowLevelEventArgs)

Private Class MedicalViewerForm
      Inherits Form
      Private _medicalViewer As MedicalViewer
      Public Sub New()
         Dim _codecs As New RasterCodecs()
         Dim _image As RasterImage

         AddHandler SizeChanged, AddressOf MedicalViewerForm_SizeChanged
         ' Create the medical viewer and adjust the size and the location.
         _medicalViewer = New MedicalViewer(1, 2)
         _medicalViewer.Location = New Point(0, 0)
         _medicalViewer.Size = New Size(Me.ClientRectangle.Right, Me.ClientRectangle.Bottom)

         ' Load an image and then add it to the control.
         _image = _codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "xa.dcm"))
         Dim cell As New MedicalViewerMultiCell(_image, True, 1, 1)

         ' add window level action that will be used to change the properties of the images inside the control.
         cell.AddAction(MedicalViewerActionType.WindowLevel)

             ' assign the added actions to a mouse button, meaning that when the user clicks and drags the mouse button, the associated action will be activated.
         cell.SetAction(MedicalViewerActionType.WindowLevel, MedicalViewerMouseButtons.Left, MedicalViewerActionFlags.Active)

         _medicalViewer.Cells.Add(cell)

             ' adjust some properties of the cell and add some tags.
         _medicalViewer.Cells(0).SetTag(2, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.UserData, "EX. ID 230-36-5448")
         _medicalViewer.Cells(0).SetTag(4, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Frame)
         _medicalViewer.Cells(0).SetTag(6, MedicalViewerTagAlignment.TopLeft, MedicalViewerTagType.Scale)
         _medicalViewer.Cells(0).SetTag(2, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.WindowLevelData)
         _medicalViewer.Cells(0).SetTag(1, MedicalViewerTagAlignment.BottomLeft, MedicalViewerTagType.FieldOfView)

         Controls.Add(_medicalViewer)
         _medicalViewer.Dock = DockStyle.Fill
      End Sub

      Private Sub MedicalViewerForm_SizeChanged(ByVal sender As Object, ByVal e As EventArgs)
         _medicalViewer.Size = New Size(Me.ClientRectangle.Right, Me.ClientRectangle.Bottom)
      End Sub
      Public ReadOnly Property Viewer() As MedicalViewer
         Get
            Return _medicalViewer
         End Get
      End Property
   End Class

   Private Function GetMedicalControl() As MedicalViewerForm
      Return New MedicalViewerForm()
   End Function

   ' When the user uses the window level tool, this example displays the previous and new window level values.

   Public Sub MedicalViewerAnnotationCreatedExample()
      Dim myForm As MedicalViewerForm = GetMedicalControl()
      Dim medicalViewer As MedicalViewer = myForm.Viewer
      Dim cell As MedicalViewerMultiCell = CType(medicalViewer.Cells(0), MedicalViewerMultiCell)

      AddHandler cell.ChangingWindowLevel, AddressOf medicalViewer_ChangingWindowLevel
      myForm.ShowDialog()
   End Sub

   Private Sub medicalViewer_ChangingWindowLevel(ByVal sender As Object, ByVal e As Leadtools.MedicalViewer.MedicalViewerChangingWindowLevelEventArgs)
      Dim msg As String = String.Format(Constants.vbLf & "Sub Cell Index: {0}" & "Previous Window Center: {1}" & Constants.vbLf & "Previous Window Width: {2}" & Constants.vbLf & "New Window Center: {3}" & Constants.vbLf & "New Window Width{4}", e.SubCellIndex, e.OldCenter, e.OldWidth, e.Center, e.Width)
      Console.WriteLine(msg)
   End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class