ScaleType Property

'Declaration
 
Public Property ScaleType As MedicalViewerScaleType

Private Class MedicalViewerDynamicZoomForm : Inherits Form
    Private _medicalViewer As MedicalViewer
    Private _seriesManager As MedicalViewerSeriesManager
    Private Sub MedicalViewer_SizeChanged(ByVal sender As Object, ByVal e As EventArgs)
        _medicalViewer.Size = New Size(Me.ClientRectangle.Right, Me.ClientRectangle.Bottom)
    End Sub

    Public Sub New(ByVal output As MedicalViewerSeriesManager)
        DicomEngine.Startup()
        Dim _codecs As RasterCodecs = New RasterCodecs()

        AddHandler SizeChanged, AddressOf MedicalViewer_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)

        _seriesManager = output

        Dim cell As MedicalViewerMultiCell = New MedicalViewerMultiCell(Nothing, True, 1, 1)

        Dim index As Integer
        Dim count As Integer = output.Stacks(0).Items.Count
        Dim codecsInformation As CodecsImageInfo

        Dim imageInformation As MedicalViewerImageInformation() = New MedicalViewerImageInformation(count - 1) {}

        index = 0
        Do While index < count
            codecsInformation = _codecs.GetInformation(CStr(output.Stacks(0).Items(index).Data), True)

            imageInformation(index) = New MedicalViewerImageInformation()
            imageInformation(index).ImageHeight = codecsInformation.Width
            imageInformation(index).ImageWidth = codecsInformation.Width
            imageInformation(index).XResolution = codecsInformation.XResolution
            imageInformation(index).YResolution = codecsInformation.YResolution
            index += 1
        Loop

        AddHandler cell.FramesRequested, AddressOf cell_FramesRequested
        AddHandler FormClosing, AddressOf MedicalViewerLocalizer_FormClosing
        cell.EnableLowMemoryUsage(2, count, imageInformation)
        cell.FitImageToCell = False

        ' 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)

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

        cell.ReferenceLine.Enabled = True
        cell.ReferenceLine.Color = Color.Yellow
        cell.ShowCellBoundaries = True

        _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)

        cell.PixelSpacing = output.Stacks(0).PixelSpacing

        index = 0
        Do While index < count
            cell.SetImagePosition(index, output.Stacks(0).Items(index).ImagePosition, (index = count - 1))
            index += 1
        Loop
        cell.ImageOrientation = output.Stacks(0).Items(0).ImageOrientationArray
        cell.FrameOfReferenceUID = output.Stacks(0).Items(0).FrameOfReferenceUID

        cell.ScaleType = MedicalViewerScaleType.Dynamic

        cell.ActiveSubCell = cell.PageCount \ 2
        Controls.Add(_medicalViewer)
        _medicalViewer.Dock = DockStyle.Fill
        DicomEngine.Shutdown()
    End Sub

    Private Sub MedicalViewerLocalizer_FormClosing(ByVal sender As Object, ByVal e As FormClosingEventArgs)
    End Sub

    Private Sub cell_FramesRequested(ByVal sender As Object, ByVal e As MedicalViewerRequestedFramesInformationEventArgs)
        Dim cell As MedicalViewerMultiCell = CType(sender, MedicalViewerMultiCell)
        Dim _codecs As RasterCodecs = New RasterCodecs()
        Dim i As Integer
        Dim image As RasterImage
        Dim fileName As String

        If e.RequestedFramesIndexes.Length > 0 Then
            fileName = CStr(_seriesManager.Stacks(0).Items(e.RequestedFramesIndexes(0)).Data)
            image = _codecs.Load(fileName)
        Else
            Return
        End If

        i = 1
        Do While i < e.RequestedFramesIndexes.Length
            fileName = CStr(_seriesManager.Stacks(0).Items(e.RequestedFramesIndexes(i)).Data)
            image.AddPage(_codecs.Load(fileName))
            i += 1
        Loop

        cell.SetRequestedImage(image, e.RequestedFramesIndexes, MedicalViewerSetImageOptions.Insert)
    End Sub

    Public ReadOnly Property Viewer() As MedicalViewer
        Get
            Return _medicalViewer
        End Get
    End Property
End Class

Private Function GetMedicalViewerDynamicZoomForm() As MedicalViewerDynamicZoomForm
    MessageBox.Show("Zoom by clicking on the area you want to zoom using the left mouse button")
    Dim form As MedicalViewerSeriesManagerFrom = New MedicalViewerSeriesManagerFrom()
    Dim output As MedicalViewerSeriesManager = form.LoadJamesHead()

    Return New MedicalViewerDynamicZoomForm(output)
End Function

' This example changes the default window level value by decrease the width by 100. Then resets the images based on the new value.

Public Sub MedicalViewerDynamicZoomExample()
    Dim myForm As MedicalViewerDynamicZoomForm = GetMedicalViewerDynamicZoomForm()
    Dim medicalViewer As MedicalViewer = myForm.Viewer

    myForm.ShowDialog()
End Sub