PostPaint Event

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.MedicalViewer

Private Class MedicalViewerForm : Inherits Form
   Private _medicalViewer As MedicalViewer
   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 Sub New()
      Dim _codecs As RasterCodecs = 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 MedicalViewerMultiCell = New MedicalViewerMultiCell(_image, True, 1, 1)
      _medicalViewer.Cells.Add(cell)

      ' add some actions that will be used to change the properties of the images inside the control.
      cell.AddAction(MedicalViewerActionType.WindowLevel)
      cell.AddAction(MedicalViewerActionType.Alpha)
      cell.AddAction(MedicalViewerActionType.Offset)
      cell.AddAction(MedicalViewerActionType.NudgeTool)

      ' 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.NudgeTool, MedicalViewerMouseButtons.Left, MedicalViewerActionFlags.Active)
      cell.SetAction(MedicalViewerActionType.Alpha, MedicalViewerMouseButtons.Middle, MedicalViewerActionFlags.Active)
      cell.SetAction(MedicalViewerActionType.Offset, MedicalViewerMouseButtons.Right, MedicalViewerActionFlags.Active)

      ' 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)


      ' Load another image and then add it to the control.
      _image = _codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "mr.dcm"))
      _medicalViewer.Cells.Add(New MedicalViewerMultiCell(_image, True, 2, 2))

      ' add some actions that will be used to change the properties of the images inside the control.
      _medicalViewer.Cells(1).AddAction(MedicalViewerActionType.WindowLevel)
      _medicalViewer.Cells(1).AddAction(MedicalViewerActionType.Alpha)
      _medicalViewer.Cells(1).AddAction(MedicalViewerActionType.Offset)
      _medicalViewer.Cells(1).AddAction(MedicalViewerActionType.RectangleRegion)

      ' 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.
      _medicalViewer.Cells(1).SetAction(MedicalViewerActionType.RectangleRegion, MedicalViewerMouseButtons.Left, MedicalViewerActionFlags.Active)
      _medicalViewer.Cells(1).SetAction(MedicalViewerActionType.Alpha, MedicalViewerMouseButtons.Middle, MedicalViewerActionFlags.Active)
      _medicalViewer.Cells(1).SetAction(MedicalViewerActionType.Offset, MedicalViewerMouseButtons.Right, MedicalViewerActionFlags.Active)

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


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

' This example will freeze the subcell with even numbers and then type the draw X in the middle of the frozen sub-cells.
<TestMethod()> _
Public Sub MedicalViewerPaintInformationExample()
   Dim myForm As MedicalViewerForm = GetMedicalControl()
   Dim medicalViewer As MedicalViewer = myForm.Viewer
   Dim cell As MedicalViewerMultiCell = CType(medicalViewer.Cells(0), MedicalViewerMultiCell)
   Dim i As Integer

   i = 0
   Do While i < cell.Image.PageCount
      If ((i >> 1) << 1) = i Then
         cell.FreezeSubCell(i, True)
      End If
      i += 1
   Loop


   AddHandler cell.PostPaint, AddressOf medicalViewer_PostPaint

   myForm.ShowDialog()
End Sub

Private Sub medicalViewer_PostPaint(ByVal sender As Object, ByVal e As MedicalViewerPaintInformationEventArgs)
   Dim cell As MedicalViewerMultiCell = CType(sender, MedicalViewerMultiCell)

   If cell.SubCellFrozen(e.SubCellIndex) Then
      e.Graphics.DrawLine(Pens.Red, New Point(e.ClipRectangle.Left, e.ClipRectangle.Top), New Point(e.ClipRectangle.Right, e.ClipRectangle.Bottom))
      e.Graphics.DrawLine(Pens.Red, New Point(e.ClipRectangle.Right, e.ClipRectangle.Top), New Point(e.ClipRectangle.Left, e.ClipRectangle.Bottom))
   End If
End Sub

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