SetOffset Method


Translates the image position according to the provided X and Y values.

public void SetOffset( 
   int subCellIndex, 
   double x, 
   double y 
Public Overloads Sub SetOffset( _ 
   ByVal subCellIndex As Integer, _ 
   ByVal x As Double, _ 
   ByVal y As Double _ 
void SetOffset(  
   int subCellIndex, 
   double x, 
   double y 


A zero-based index of the sub-cell that contains the image that will have its offset changed.

The x coordinates that represents the new position of the image.

The y coordinates that represents the new position of the image.

  • The points are relative to the center of the cell and the center of the image. This means that if you set the X and Y values to {0, 0}, the image will be displayed at the center of the cell.
  • If the cell has multiple frames, the offset value will be applied to all of them.
  • To change the offset using the mouse button, use the AddAction method to add the action to the Medical Viewer Cell. Then use the SetAction method to associate the offset action with a mouse button.

using Leadtools; 
using Leadtools.Dicom; 
using Leadtools.Medical3D; 
using Leadtools.Codecs; 
using Leadtools.MedicalViewer; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Annotations.Engine; 
using Leadtools.Annotations.Designers; 
class MedicalViewerWindowLevelAndOffsetForm : Form 
   private MedicalViewer _medicalViewer; 
   private MedicalViewerSeriesManager _seriesManager; 
   private int width; 
   private int center; 
   private double offsetX; 
   private double offsetY; 
   void MedicalViewerLocalizer_SizeChanged(object sender, EventArgs e) 
      _medicalViewer.Size = new Size(this.ClientRectangle.Right, this.ClientRectangle.Bottom); 
   public MedicalViewerWindowLevelAndOffsetForm(MedicalViewerSeriesManager output) 
      RasterCodecs _codecs = new RasterCodecs(); 
      this.SizeChanged += new EventHandler(MedicalViewerLocalizer_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(this.ClientRectangle.Right, this.ClientRectangle.Bottom); 
      _seriesManager = output; 
      MedicalViewerMultiCell cell = new MedicalViewerMultiCell(null, true, 1, 1); 
      int index; 
      int count = output.Stacks[0].Items.Count; 
      CodecsImageInfo codecsInformation; 
      MedicalViewerImageInformation[] imageInformation = new MedicalViewerImageInformation[count]; 
      for (index = 0; index < count; index++) 
         codecsInformation = _codecs.GetInformation((string)(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; 
      cell.FramesRequested += new EventHandler<MedicalViewerRequestedFramesInformationEventArgs>(cell_FramesRequested); 
      FormClosing += new FormClosingEventHandler(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. 
      // 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); 
      cell.SetAction(MedicalViewerActionType.Offset, MedicalViewerMouseButtons.Right, MedicalViewerActionFlags.Active); 
      cell.ReferenceLine.Enabled = true; 
      cell.ReferenceLine.Color = Color.Yellow; 
      cell.ShowCellBoundaries = true; 
      cell.CellMouseClick += new EventHandler<MedicalViewerCellMouseEventArgs>(cell_ResetCellMouseClick); 
      // 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; 
      for (index = 0; index < count; index++) 
         cell.SetImagePosition(index, output.Stacks[0].Items[index].ImagePosition, (index == count - 1)); 
      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; 
      width = cell.GetWindowLevelWidth(cell.ActiveSubCell); 
      center = cell.GetWindowLevelCenter(cell.ActiveSubCell); 
      Point2D point = cell.GetOffset(cell.ActiveSubCell); 
      offsetX = point.X; 
      offsetY = point.Y; 
      _medicalViewer.Dock = DockStyle.Fill; 
   void MedicalViewerLocalizer_FormClosing(object sender, FormClosingEventArgs e) 
   void cell_FramesRequested(object sender, MedicalViewerRequestedFramesInformationEventArgs e) 
      MedicalViewerMultiCell cell = (MedicalViewerMultiCell)(sender); 
      RasterCodecs _codecs = new RasterCodecs(); 
      int i; 
      RasterImage image; 
      string fileName; 
      if (e.RequestedFramesIndexes.Length > 0) 
         fileName = (string)(_seriesManager.Stacks[0].Items[e.RequestedFramesIndexes[0]].Data); 
         image = _codecs.Load(fileName); 
      for (i = 1; i < e.RequestedFramesIndexes.Length; i++) 
         fileName = (string)(_seriesManager.Stacks[0].Items[e.RequestedFramesIndexes[i]].Data); 
      cell.SetRequestedImage(image, e.RequestedFramesIndexes, MedicalViewerSetImageOptions.Insert); 
   public MedicalViewer Viewer 
      get { return _medicalViewer; } 
   void cell_ResetCellMouseClick(object sender, MedicalViewerCellMouseEventArgs e) 
      if (e.Button == MouseButtons.Middle) 
         MedicalViewerMultiCell cell = ((MedicalViewerMultiCell)sender); 
         cell.SetWindowLevel(cell.ActiveSubCell, width, center); 
         cell.SetOffset(cell.ActiveSubCell, offsetX, offsetY); 
MedicalViewerWindowLevelAndOffsetForm GetMedicalViewerWindowLevelAndOffsetForm() 
   MessageBox.Show("Left click to window level. \n right click to offset \n middle click to reset"); 
   MedicalViewerSeriesManagerFrom form = new MedicalViewerSeriesManagerFrom(); 
   MedicalViewerSeriesManager output = form.LoadJamesHead(); 
   return new MedicalViewerWindowLevelAndOffsetForm(output); 
// This example changes the default window level value by decrease the width by 100. Then resets the images based on the new value. 
public void MedicalViewerWindowLevelAndOffsetExample() 
   MedicalViewerWindowLevelAndOffsetForm myForm = GetMedicalViewerWindowLevelAndOffsetForm(); 
   MedicalViewer medicalViewer = myForm.Viewer; 
Imports Leadtools 
Imports Leadtools.Dicom 
Imports Leadtools.Medical3D 
Imports Leadtools.Codecs 
Imports Leadtools.MedicalViewer 
Imports Leadtools.Annotations.Engine 
Imports Leadtools.Annotations.Designers 
Imports Leadtools.ImageProcessing.Core 
Private Class MedicalViewerWindowLevelAndOffsetForm : Inherits Form 
   Private _medicalViewer As MedicalViewer 
   Private _seriesManager As MedicalViewerSeriesManager 
   Private windowLevelWidth As Integer 
   Private windowLevelCenter As Integer 
   Private offsetX As Double 
   Private offsetY As Double 
   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) 
      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 
      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. 
      ' 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) 
      cell.SetAction(MedicalViewerActionType.Offset, MedicalViewerMouseButtons.Right, MedicalViewerActionFlags.Active) 
      cell.ReferenceLine.Enabled = True 
      cell.ReferenceLine.Color = Color.Yellow 
      cell.ShowCellBoundaries = True 
      AddHandler cell.CellMouseClick, AddressOf cell_ResetCellMouseClick 
      ' 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 
      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 
      windowLevelWidth = cell.GetWindowLevelWidth(cell.ActiveSubCell) 
      windowLevelCenter = cell.GetWindowLevelCenter(cell.ActiveSubCell) 
      Dim point As Point2D = cell.GetOffset(cell.ActiveSubCell) 
      offsetX = point.X 
      offsetY = point.Y 
      _medicalViewer.Dock = DockStyle.Fill 
   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) 
      End If 
      i = 1 
      Do While i < e.RequestedFramesIndexes.Length 
         fileName = CStr(_seriesManager.Stacks(0).Items(e.RequestedFramesIndexes(i)).Data) 
         i += 1 
      cell.SetRequestedImage(image, e.RequestedFramesIndexes, MedicalViewerSetImageOptions.Insert) 
   End Sub 
   Public ReadOnly Property Viewer() As MedicalViewer 
         Return _medicalViewer 
      End Get 
   End Property 
   Private Sub cell_ResetCellMouseClick(ByVal sender As Object, ByVal e As MedicalViewerCellMouseEventArgs) 
      If e.Button = MouseButtons.Middle Then 
         Dim cell As MedicalViewerMultiCell = (CType(sender, MedicalViewerMultiCell)) 
         cell.SetWindowLevel(cell.ActiveSubCell, windowLevelWidth, windowLevelCenter) 
         cell.SetOffset(cell.ActiveSubCell, offsetX, offsetY) 
      End If 
   End Sub 
End Class 
Private Function GetMedicalViewerWindowLevelAndOffsetForm() As MedicalViewerWindowLevelAndOffsetForm 
   MessageBox.Show("Left click to window level. " & Constants.vbLf & " right click to offset " & Constants.vbLf & " middle click to reset") 
   Dim form As MedicalViewerSeriesManagerFrom = New MedicalViewerSeriesManagerFrom() 
   Dim output As MedicalViewerSeriesManager = form.LoadJamesHead() 
   Return New MedicalViewerWindowLevelAndOffsetForm(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. 
<TestMethod()> _ 
Public Sub MedicalViewerWindowLevelAndOffsetExample() 
   Dim myForm As MedicalViewerWindowLevelAndOffsetForm = GetMedicalViewerWindowLevelAndOffsetForm() 
   Dim medicalViewer As MedicalViewer = myForm.Viewer 
End Sub 


Target Platforms

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Leadtools.MedicalViewer Assembly