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InteractiveRegionFreehand Event

Summary

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

Syntax

C++

public event EventHandler<RasterViewerPointsEventArgs> InteractiveRegionFreehand

  
Public Event InteractiveRegionFreehand As EventHandler(Of RasterViewerPointsEventArgs)

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.

Property	Description
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.

Remarks

Only occurs when the InteractiveMode property is set to RasterViewerInteractiveMode.Region and the InteractiveRegionType is set to RasterViewerInteractiveRegionType.Freehand.

Example

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

using Leadtools.WinForms; 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Drawing; 
 
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); 
}

Imports Leadtools.WinForms 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Color 
Imports Leadtools.Drawing 
 
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

Requirements

Target Platforms

Reference

RasterImageViewer Class

RasterImageViewer Members

Help Version 19.0.2017.10.27