ScaleHeight Property (CaptureCtrl)

C#
Visual Basic
Objective-C
Java
C++

public virtual float ScaleHeight {get; set;}

'Declaration

Public Overridable Property ScaleHeight As Single

'Usage

Dim instance As CaptureCtrl
Dim value As Single
 
instance.ScaleHeight = value
 
value = instance.ScaleHeight

public:
virtual property float ScaleHeight {
   float get();
   void set (    float value);
}

Property Value

A value representing the height.

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.

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

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 19\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 19\Media";
}

Target Platforms

Reference

CaptureCtrl Class
CaptureCtrl Members