void TimerOnTick(object obj, EventArgs ea)
  {
   DateTime dtNow = DateTime.Now;
   dtNow = new DateTime(dtNow.Year, dtNow.Month, dtNow.Day, dtNow.Hour, dtNow.Minute, dtNow.Second);
   if (dtNow != _dateTime)
   {
    _dateTime = dtNow;
    Invalidate();
   }
  }

  protected override void OnPaint(PaintEventArgs e)
  {
   m_Bitmap = DrawClock();
   Graphics gg = e.Graphics;
   gg.CompositingQuality = CompositingQuality.HighQuality;
   gg.DrawImageUnscaled(m_Bitmap, 0, 0);
   //g.Dispose();
  }

  public Bitmap DrawClock()
  {
   return this.DrawClock(this.ClientRectangle);
  }

  private void SevenSegmentClock_Resize(object sender, System.EventArgs e)
  {
   Init();
   this.Refresh();
  }

  private void InitializeComponent()
  {
   //
   // SevenSegmentClock
   //
   this.Name = "SevenSegmentClock";
   this.Size = new System.Drawing.Size(448, 64);
   this.Resize += new System.EventHandler(this.SevenSegmentClock_Resize);
  }

  int _clockStringWidth;
  int _clockStringHeight;
  public int ClockStringWidth
  {
   get
   {
    return _clockStringWidth;
   }
  }
  
  public int ClockStringHeight
  {
   get
   {
    return _clockStringHeight;
   }
  }

//绘制时钟
  public Bitmap DrawClock(Rectangle destRect)
  {
   m_Bitmap = new Bitmap(destRect.Width, destRect.Height);
   //m_Bitmap = new Bitmap(destRect.X + this.Width, destRect.Y + this.Height);
   Graphics grfx = Graphics.FromImage(m_Bitmap);
//设置绘图面板的绘制质量等
   grfx.CompositingQuality = CompositingQuality.HighQuality;
   grfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
   grfx.SmoothingMode = SmoothingMode.HighQuality;

   SevenSegmentDisplay ssd = new SevenSegmentDisplay(grfx);
   ssd.IsDrawShadow = this._isDrawShadow;
   GraphicsState gs = grfx.Save();
   grfx.TranslateTransform(destRect.X, destRect.Y);
   string strTime = string.Empty;
   if(this._clockStyle == Seve

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