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VideoWindowLeft Property

Summary

Gets the left position of the video window.

Syntax

C++

public virtual float VideoWindowLeft { get; }

Public Overridable ReadOnly Property VideoWindowLeft As Single

public: 
virtual property float VideoWindowLeft { 
   float get(); 
}

Property Value

A value representing the left position of the video window.

Remarks

The value is in the units specified by the ScaleMode property.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
 
// capture control 
CaptureCtrl capturectrl; 
 
// output file 
string outFile = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_VideoWindowLeftExample.avi"); 
 
public void VideoWindowLeftExample() 
{ 
   // reference the capture control 
   capturectrl = _form.CaptureCtrl; 
 
   // video window left 
   Single Left = 0; 
 
   try 
   { 
      // set the source video device, select using your device name here 
      if (capturectrl.VideoDevices["USB"] == null) 
      { 
         throw new Exception("No USB video device available"); 
      } 
 
      capturectrl.VideoDevices["USB"].Selected = true; 
 
 
      // set the target output file 
      capturectrl.TargetFile = outFile; 
 
      if (capturectrl.IsModeAvailable(CaptureMode.Video)) 
      { 
         // enable the preview 
         capturectrl.Preview = true; 
 
         // get the video window left 
         Left = capturectrl.VideoWindowLeft; 
 
         // set the result to what we expect 
         _result = (Left != 0); 
      } 
   } 
   catch (COMException) 
   { 
      _result = false; 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\LEADTOOLS21\Media"; 
}

Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
Public _result As Boolean = False 
Public _form As New CaptureCtrlForm() 
 
' capture control 
Private capturectrl As CaptureCtrl 
 
' output file 
Private outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_VideoWindowLeftExample.avi") 
 
Public Sub VideoWindowLeftExample() 
   ' reference the capture control 
   capturectrl = _form.CaptureCtrl 
 
   ' video window left 
   Dim Left As [Single] = 0 
 
   Try 
      ' set the source video device, select using your device name here 
      If capturectrl.VideoDevices("USB") Is Nothing Then 
         Throw New Exception("No USB video device available") 
      End If 
 
      capturectrl.VideoDevices("USB").Selected = True 
 
 
      ' set the target output file 
      capturectrl.TargetFile = outFile 
 
      If capturectrl.IsModeAvailable(CaptureMode.Video) Then 
         ' enable the preview 
         capturectrl.Preview = True 
 
         ' get the video window left 
         Left = capturectrl.VideoWindowLeft 
 
         ' set the result to what we expect 
         _result = (Left <> 0) 
      End If 
   Catch generatedExceptionName As COMException 
      _result = False 
   Catch generatedExceptionName As Exception 
      _result = False 
   End Try 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const MediaDir As String = "C:\LEADTOOLS21\Media" 
End Class