LEADTOOLS Multimedia (Leadtools.MediaFoundation assembly)

ScaleHeight Property (CaptureCtrl)

Show in webframe
Example 



Gets or sets the height of the client area of the control.
Syntax
'Declaration
 
Public Overridable Property ScaleHeight As Single
'Usage
 
Dim instance As CaptureCtrl
Dim value As Single
 
instance.ScaleHeight = value
 
value = instance.ScaleHeight
public virtual float ScaleHeight {get; set;}
public:
virtual property float ScaleHeight {
   float get();
   void set (    float value);
}

Property Value

A value representing the height.
Remarks
Gets or sets the height of the client area of the control. If you assign a value to this property, the actual height of the control does not change, but the current height is expressed using the value that you provide. This lets you use a custom coordinate system. For example, you can set the ScaleWidth and ScaleHeight both to 100; then express all coordinates as percentage offsets.
Example
Copy Code  
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_ScaleHeightExample.avi")

Public Sub ScaleHeightExample()
    ' reference the capture control
    capturectrl = _form.CaptureCtrl

    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
            ' subscribe to the started event
            AddHandler capturectrl.Started, AddressOf CaptureCtrl_Started

            ' set the scale height
            capturectrl.ScaleHeight = 100

            ' start capture
            capturectrl.StartCapture(CaptureMode.Video)

            ' get the scale height
            Dim Height As Single = capturectrl.ScaleHeight

            ' set the result to what we expect
            _result = (Height = 100)
        End If
    Catch generatedExceptionName As COMException
        _result = False
    Catch generatedExceptionName As Exception
        _result = False
    End Try
End Sub

Private Sub CaptureCtrl_Started(ByVal sender As Object, ByVal e As EventArgs)
    ' stop the capture (we don't need a complete capture for this example)
    capturectrl.StopCapture()
End Sub

Public NotInheritable Class LEAD_VARS
Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media"
End Class
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_ScaleHeightExample.avi");

public void ScaleHeightExample()
{
   // reference the capture control
   capturectrl = _form.CaptureCtrl;

   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))
      {
         // subscribe to the started event
         capturectrl.Started += CaptureCtrl_Started;

         // set the scale height
         capturectrl.ScaleHeight = 100;

         // start capture
         capturectrl.StartCapture(CaptureMode.Video);

         // get the scale height
         float Height = capturectrl.ScaleHeight;

         // set the result to what we expect
         _result = (Height == 100);
      }
   }
   catch (COMException)
   {
      _result = false;
   }
   catch (Exception)
   {
      _result = false;
   }
}

void CaptureCtrl_Started(object sender, EventArgs e)
{
   // stop the capture (we don't need a complete capture for this example)
   capturectrl.StopCapture();
}

static class LEAD_VARS
{
public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 18\Media";
}
Requirements

Target Platforms

See Also

Reference

CaptureCtrl Class
CaptureCtrl Members

 

 


Products | Support | Contact Us | Copyright Notices
© 2006-2014 All Rights Reserved. LEAD Technologies, Inc.

Leadtools.MediaFoundation requires a Multimedia or Multimedia Suite license and unlock key. For more information, refer to: LEADTOOLS Toolkit Features