Mutex and UI : Thread UI « GUI Windows Forms « C# / CSharp Tutorial

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C# / CSharp Tutorial » GUI Windows Forms » Thread UI 
23.74.1.Mutex and UI
Mutex and UI
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Threading;

public class MutexForm : System.Windows.Forms.Form
{
  private Mutex m = new Mutexfalse, "WinMutex" );
  private bool bHaveMutex = false;

  public MutexForm()
  {
    Thread T = new Threadnew ThreadStartThreadProc ) );
    T.Start( );
    
  }

  protected override void OnPaintPaintEventArgs e ) {
    ifthis.bHaveMutex )
      DrawCircleSystem.Drawing.Color.Green );
    else
      DrawCircleSystem.Drawing.Color.Red );
  }

  protected void DrawCircleSystem.Drawing.Color color ) {
    using(Brush b = new SolidBrushcolor )){
    using(Graphics g = this.CreateGraphics( )){
       g.FillEllipseb, 00this.ClientSize.Width, this.ClientSize.Height );    
    }}
  }

  protected void ThreadProc( ) {
    whiletrue ) {
      m.WaitOne( );
      bHaveMutex = true;
      Invalidate( );
      Update( );
      Thread.Sleep1000 );
      m.ReleaseMutex( );
      bHaveMutex = false;
      Invalidate( );
      Update( );
    }
  }
  [STAThread]
  static void Main() 
  {
    Application.Run(new MutexForm());
  }
}
23.74.Thread UI
23.74.1.Mutex and UIMutex and UI
23.74.2.Multithreading in Windows Forms
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