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ScaleWidth Property

Summary

Specifies the width of the client area of the control.

Syntax

C++/CLI

public virtual float ScaleWidth { get; set; }

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

Property Value

A value representing the width.

Remarks

If you assign a value to this property, the actual width of the control does not change, but the current width 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

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(false); 
 
// capture control 
CaptureCtrl capturectrl; 
 
// output file 
string outFile = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_ScaleWidthExample.avi"); 
 
public void ScaleWidthExample() 
{ 
   // 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 width 
         capturectrl.ScaleWidth = 100; 
 
         // start capture 
         capturectrl.StartCapture(CaptureMode.Video); 
 
         // get the scale sidth 
         float Width = capturectrl.ScaleWidth; 
 
         // set the result to what we expect 
         _result = (Width == 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:\LEADTOOLS23\Media"; 
}

Requirements

Target Platforms

Reference

CaptureCtrl Class

CaptureCtrl Members

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Help Version 23.0.2024.2.29

Leadtools.MediaFoundation Assembly

Introduction

Getting Started

Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies