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MedicalViewerAlpha Class
See Also  Members   Example 
Leadtools.MedicalViewer Namespace : MedicalViewerAlpha Class




Represents the class that contains the properties of the alpha channel.

Syntax

Visual Basic (Declaration) 
Public Class MedicalViewerAlpha 
   Inherits MedicalViewerCommonActions
Visual Basic (Usage)Copy Code
Dim instance As MedicalViewerAlpha
C# 
public class MedicalViewerAlpha : MedicalViewerCommonActions 
Managed Extensions for C++ 
public __gc class MedicalViewerAlpha : public MedicalViewerCommonActions 
C++/CLI 
public ref class MedicalViewerAlpha : public MedicalViewerCommonActions 

Example

Change the alpha factor of an image

Visual BasicCopy Code
<Test> _
Public Sub MedicalViewerAlphaExample1()
   Dim myForm As MedicalViewerForm = GetMedicalControl()
   Dim medicalViewer As MedicalViewer = myForm.Viewer
   Dim windowLevel As MedicalViewerWindowLevel = CType(medicalViewer.GetActionProperties(MedicalViewerActionType.WindowLevel, 0, 0), MedicalViewerWindowLevel)

   Select Case windowLevel.LookupTableType
      Case MedicalViewerLookupTableType.Exponential, MedicalViewerLookupTableType.Logarithmic, MedicalViewerLookupTableType.Sigmoid
         Dim alpha As MedicalViewerAlpha = CType(medicalViewer.GetActionProperties(MedicalViewerActionType.Alpha, 0, 0), MedicalViewerAlpha)
         alpha.Alpha += 100
         medicalViewer.SetActionProperties(MedicalViewerActionType.Alpha, alpha, 0, 0)
      Case Else
   End Select
   myForm.ShowDialog()
End Sub
C#Copy Code
public void MedicalViewerAlphaExample1() 

   MedicalViewerForm myForm  = GetMedicalControl(); 
   MedicalViewer medicalViewer = myForm.Viewer; 
 
   MedicalViewerWindowLevel windowLevel = (MedicalViewerWindowLevel)medicalViewer.GetActionProperties(MedicalViewerActionType.WindowLevel, 0, 0); 
 
   switch(windowLevel.LookupTableType) 
   { 
      case MedicalViewerLookupTableType.Exponential: 
      case MedicalViewerLookupTableType.Logarithmic: 
      case MedicalViewerLookupTableType.Sigmoid: 
         MedicalViewerAlpha alpha = (MedicalViewerAlpha)medicalViewer.GetActionProperties(MedicalViewerActionType.Alpha, 0, 0); 
         alpha.Alpha += 100; 
         medicalViewer.SetActionProperties(MedicalViewerActionType.Alpha, alpha, 0, 0); 
         break; 
      default: 
         break; 
   } 
   myForm.ShowDialog(); 
}

Remarks

To set the properties of the alpha channel, call the SetActionProperties method. To retrieve the properties call the GetActionProperties method.

Alpha is the standard name for the Factor Value that indicates the factor to be applied to the lookup table. It is important to set the value of the lookup table to one of the following types: Sigmoid, Logarithmic or exponential. Valid values range from -1000 to 1000.

The mouse controls the actions as follows:

  • Click and hold the mouse to start the effect. When the assigned mouse button is released the action ends.
  • Dragging the mouse to the left decreases the center parameter.
  • Dragging the mouse to the right increases the center parameter.
  • Dragging the mouse up decreases the width parameter.
  • Dragging the mouse down increases the width parameter.

Inheritance Hierarchy

System.Object
   Leadtools.MedicalViewer.MedicalViewerBaseAction
      Leadtools.MedicalViewer.MedicalViewerCommonActions
         Leadtools.MedicalViewer.MedicalViewerAlpha

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also

Leadtools.MedicalViewer requires a Medical toolkit license and unlock key. For more information, refer to: Raster Pro/Document/Medical Features