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ChangingWindowLevel Event

Summary

Optional delegate method for additional processing.

Syntax

C++/CLI

public event EventHandler<MedicalViewerChangingWindowLevelEventArgs> ChangingWindowLevel

            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.

Property	Description
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

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:\LEADTOOLS23\Resources\Images"; 
}

Requirements

Target Platforms

Reference

MedicalViewerBaseCell Class

MedicalViewerBaseCell Members

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Help Version 23.0.2024.2.29

Leadtools.MedicalViewer Assembly

Introduction

Getting Started

Namespaces

Leadtools.MedicalViewer Namespace

Assemblies