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InteractiveRegionFreehand Event
See Also 
Leadtools.WinForms Namespace > RasterImageViewer Class : InteractiveRegionFreehand Event



Occurs when the user performs interactive creation of a freehand region for the image.

Syntax

Visual Basic (Declaration) 
Public Event InteractiveRegionFreehand As EventHandler(Of RasterViewerPointsEventArgs)
Visual Basic (Usage)Copy Code
Dim instance As RasterImageViewer
Dim handler As EventHandler(Of RasterViewerPointsEventArgs)
 
AddHandler instance.InteractiveRegionFreehand, handler
C# 
public event EventHandler<RasterViewerPointsEventArgs> InteractiveRegionFreehand
C++/CLI 
public:
event EventHandler<RasterViewerPointsEventArgs^>^ InteractiveRegionFreehand

Event Data

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

PropertyDescription
Cancel (Inherited from Leadtools.WinForms.RasterViewerInteractiveEventArgs)Gets or sets a value indicating whether the interactive mode should be canceled.
Points Returns the current interactive mode points.
Status (Inherited from Leadtools.WinForms.RasterViewerInteractiveEventArgs)Gets the current status of the interactive mode.

Example

This sample lets you draw a freehand region with the mouse Also, it displays the contents of the InteractiveRegionFreehand event in the console

Visual BasicCopy Code
Private Sub viewer_InteractiveRegionFreehand(ByVal sender As Object, ByVal e As RasterViewerPointsEventArgs)
   Console.WriteLine("InteractiveRegionFreehand: PointCount {0} e.Status {1}, e.Cancel {2}", e.Points.Count, e.Status, e.Cancel)
End Sub
Public Sub RasterImageViewer_InteractiveRegionFreehand(ByVal viewer As RasterImageViewer)
   viewer.InteractiveMode = RasterViewerInteractiveMode.Region
   viewer.InteractiveRegionType = RasterViewerInteractiveRegionType.Freehand
   AddHandler viewer.InteractiveRegionFreehand, AddressOf viewer_InteractiveRegionFreehand

   ' Draw the mouse on image to draw an elliptical region
   ' After you are done, you must remove the event handler as in below
   '
   ' viewer.InteractiveRegionFreehand -= new EventHandler<RasterViewerPointsEventArgs>(viewer_InteractiveRegionFreehand);
End Sub
C#Copy Code
private void viewer_InteractiveRegionFreehand(object sender, RasterViewerPointsEventArgs e)
{
   Console.WriteLine("InteractiveRegionFreehand: PointCount {0} e.Status {1}, e.Cancel {2}", e.Points.Count, e.Status, e.Cancel);
}
public void RasterImageViewer_InteractiveRegionFreehand(RasterImageViewer viewer)
{
   viewer.InteractiveMode = RasterViewerInteractiveMode.Region;
   viewer.InteractiveRegionType = RasterViewerInteractiveRegionType.Freehand;
   viewer.InteractiveRegionFreehand += new EventHandler<RasterViewerPointsEventArgs>(viewer_InteractiveRegionFreehand);

   // Draw the mouse on image to draw an elliptical region
   // After you are done, you must remove the event handler as in below
   //
   // viewer.InteractiveRegionFreehand -= new EventHandler<RasterViewerPointsEventArgs>(viewer_InteractiveRegionFreehand);
}

Remarks

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7

See Also