ChangingWindowLevel Event

Summary

Optional delegate method for additional processing.

Syntax
C#
VB
C++
public event EventHandler<MedicalViewerChangingWindowLevelEventArgs> ChangingWindowLevel 
  
Public Event ChangingWindowLevel As EventHandler(Of MedicalViewerChangingWindowLevelEventArgs) 
            public: 
event EventHandler<MedicalViewerChangingWindowLevelEventArgs^>^ ChangingWindowLevel 

Event Data

The event handler receives an argument of type MedicalViewerChangingWindowLevelEventArgs containing data related to this event. The following MedicalViewerChangingWindowLevelEventArgs properties provide information specific to this event.

PropertyDescription
Center Gets the value that indicates the new window center.
OldCenter Gets the value that indicates the previous window center.
OldWidth Gets the value that indicates the previous window width.
SubCellIndex Gets the value that indicates the index of sub-cell that contains the image which to be affected by the window level action.
Width Gets the value that indicates the new window width.

Example
C#
VB
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.MedicalViewer; 
 
class MedicalViewerForm : Form 
{ 
   private MedicalViewer _medicalViewer; 
 
   public MedicalViewerForm() 
   { 
      RasterCodecs _codecs = new RasterCodecs(); 
      RasterImage _image; 
 
      this.SizeChanged += new EventHandler(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(this.ClientRectangle.Right, this.ClientRectangle.Bottom); 
 
      // Load an image and then add it to the control. 
      _image = _codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "xa.dcm")); 
      MedicalViewerMultiCell cell = 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; 
   } 
 
   void MedicalViewerForm_SizeChanged(object sender, EventArgs e) 
   { 
      _medicalViewer.Size = new Size(this.ClientRectangle.Right, this.ClientRectangle.Bottom); 
   } 
   public MedicalViewer Viewer 
   { 
      get { return _medicalViewer; } 
   } 
} 
 
MedicalViewerForm GetMedicalControl() 
{ 
   return new MedicalViewerForm(); 
} 
 
// When the user uses the window level tool, this example displays the previous and new window level values. 
public void MedicalViewerAnnotationCreatedExample() 
{ 
   MedicalViewerForm myForm = GetMedicalControl(); 
   MedicalViewer medicalViewer = myForm.Viewer; 
   MedicalViewerMultiCell cell = (MedicalViewerMultiCell)(medicalViewer.Cells[0]); 
 
   cell.ChangingWindowLevel += new EventHandler<Leadtools.MedicalViewer.MedicalViewerChangingWindowLevelEventArgs>(medicalViewer_ChangingWindowLevel); 
   myForm.ShowDialog(); 
} 
 
void medicalViewer_ChangingWindowLevel(object sender, Leadtools.MedicalViewer.MedicalViewerChangingWindowLevelEventArgs e) 
{ 
   string msg = string.Format("\nSub Cell Index: {0}\nPrevious Window Center: {1}\nPrevious Window Width: {2}\nNew Window Center: {3}\nNew Window Width{4}", 
      e.SubCellIndex, 
      e.OldCenter, 
      e.OldWidth, 
      e.Center, 
      e.Width); 
   Console.WriteLine(msg); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
} 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.MedicalViewer 
 
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 

Requirements

Target Platforms

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Leadtools.MedicalViewer Assembly