;   _timer = new Timer();
      _timer.Tick    += new EventHandler(TimerOnTick);
      _timer.Interval = 1000;
      _timer.Enabled  = true;
     }
    }
    else
    {
     if(this._timer != null)
     {
      _timer.Enabled  = false;
     }
    }
    this._isTimerEnable = value;
   }
  }

  public void Start()
  {
   this.IsTimerEnable = true;
   this.Refresh();
  }

  public void Stop()
  {
   this.IsTimerEnable = false;
  }

  public System.DateTime DateTime
  {
   get { return this._dateTime; }
   set { this._dateTime = value; }
  }

//LED文字的颜色
  public System.Drawing.Color ClockColor
  {
   get { return this._clockColor; }
   set
   {
    this._clockColor = value;
    this.Invalidate();
   }
  }

  public SevenSegmentClockStyle SevenSegmentClockStyle
  {
   get { return this._clockStyle; }
   set
   {
    this._clockStyle = value;
    this.Invalidate();
   }
  }

  public SevenSegmentClock()
  {
   Text = "Seven-Segment Clock";
//使用双缓冲，支持透明绘制
   SetStyle(ControlStyles.UserPaint | ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint
    | ControlStyles.ResizeRedraw | ControlStyles.SupportsTransparentBackColor, true);
   this.UpdateStyles();
   Init();
   _dateTime = DateTime.Now;
  }

//初始化
  private void Init()
  {
   m_Bitmap = new Bitmap(this.Width, this.Height);

   g = Graphics.FromImage(m_Bitmap);
   g.CompositingQuality = CompositingQuality.HighQuality;
   g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
   
   //g.InterpolationMode = InterpolationMode.HighQualityBicubic;
   g.SmoothingMode = SmoothingMode.HighQuality;
   //g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
  }

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