一個模仿LED的控件

filedot 2012-01-14

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給你一個模仿LED的控件

//SevenSegmentClock.cs
namespace LEDClock
{
public partial class SevenSegmentClock : UserControl
{
public SevenSegmentClock()
{
Text = "Seven-Segment Clock";
//使用雙緩沖，支持透明繪制
SetStyle(ControlStyles.UserPaint | ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint
| ControlStyles.ResizeRedraw | ControlStyles.SupportsTransparentBackColor, true);
this.UpdateStyles();
Init();
_dateTime = DateTime.Now;
}

DateTime _dateTime;
        //默認使用同時繪制日期和時間
        SevenSegmentClockStyle _clockStyle = SevenSegmentClockStyle.DateAndTime;
        Color _clockColor = Color.Black;
        //是否繪制陰影（即殘影），以摸擬真似的LED時鐘
        bool _isDrawShadow = true;

        Timer _timer = null;
        //是否自動更新時間
        bool _isTimerEnable = false;
        Graphics g = null;
        Bitmap m_Bitmap = null;

        public bool IsDrawShadow
        {
            get { return this._isDrawShadow; }
            set
            {
                this._isDrawShadow = value;
                this.Invalidate();
            }
        }

        [Browsable(false)]
        public System.Windows.Forms.Timer Timer
        {
            get { return this._timer; }
            set
            {
                this._timer = value;
                if (_timer != null)
                {
                    _timer.Tick += new EventHandler(TimerOnTick);
                }
            }
        }

        public bool IsTimerEnable
        {
            get { return this._isTimerEnable; }
            set
            {
                if (value == true)
                {
                    if (this._timer == null)
                    {
                        _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文字的顏色
        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();
            }
        }

        //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;
        }

        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();
        }

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

        public int ClockStringHeight
        {
            get
            {
                return _clockStringHeight;
            }
        }

        //繪制時鐘
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);
//設(shè)置繪圖面板的繪制質(zhì)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 == SevenSegmentClockStyle.TimeOnly)
{
strTime = _dateTime.ToString("T", DateTimeFormatInfo.InvariantInfo);
}
else if (this._clockStyle == SevenSegmentClockStyle.DateOnly)
{
//設(shè)置日期格式
strTime = _dateTime.ToString("yyyy-MM-dd", DateTimeFormatInfo.InvariantInfo);
}
else
{
strTime = _dateTime.ToString("yyyy-MM-dd", DateTimeFormatInfo.InvariantInfo) + " " + _dateTime.ToString("T", DateTimeFormatInfo.InvariantInfo);
}

SizeF sizef = ssd.MeasureString(strTime, Font);
float fScale = Math.Min(destRect.Width / sizef.Width, destRect.Height / sizef.Height);
Font font = new Font(Font.FontFamily, fScale * Font.SizeInPoints);

sizef = ssd.MeasureString(strTime, font);
_clockStringWidth = (int)sizef.Width;
_clockStringHeight = (int)sizef.Height;

ssd.DrawString(strTime, font, new SolidBrush(this._clockColor),
(destRect.Width - sizef.Width) / 2,
(destRect.Height - sizef.Height) / 2);
grfx.Restore(gs);
return m_Bitmap;
}
}
}

-------------------------------------------------------------------------------------------------------
//SevenSegmentDisplay.cs
namespace LEDClock
{
/// <summary>
/// Clock's Style.時鐘的樣式定義
/// </summary>
public enum SevenSegmentClockStyle
{
DateOnly, // 只顯示日期
TimeOnly, // 只顯示時間
DateAndTime //顯示日期和時間
}

//字符繪制的算法
class SevenSegmentDisplay
{
Graphics grfx;
Brush _brush = Brushes.Black;
bool _isDrawShadow = true;
Color _shadowColor = Color.FromArgb(60, Color.White);
Brush _shadowBrush = null;
// Indicates what segments are illuminated for all 10 digits

static byte[,] bySegment = {
         {1, 1, 1, 0, 1, 1, 1},       // 0
         {0, 0, 1, 0, 0, 1, 0},       // 1
         {1, 0, 1, 1, 1, 0, 1},       // 2
         {1, 0, 1, 1, 0, 1, 1},       // 3
         {0, 1, 1, 1, 0, 1, 0},       // 4
         {1, 1, 0, 1, 0, 1, 1},       // 5
         {1, 1, 0, 1, 1, 1, 1},       // 6
         {1, 0, 1, 0, 0, 1, 0},       // 7
         {1, 1, 1, 1, 1, 1, 1},       // 8
         {1, 1, 1, 1, 0, 1, 1}        // 9
           };
// Points that define each of the seven segments
readonly Point[][] apt = new Point[7][];

public bool IsDrawShadow
{
get { return this._isDrawShadow; }
set { this._isDrawShadow = value; }
}

public SevenSegmentDisplay(Graphics grfx)
{
this.grfx = grfx;
// Initialize jagged Point array.
apt[0] = new Point[] {
          new Point( 3,  2), new Point(39,  2),
          new Point(31, 10), new Point(11, 10)
         };

apt[1] = new Point[] {
          new Point( 2,  3), new Point(10, 11),
          new Point(10, 31), new Point( 2, 35)
         };

apt[2] = new Point[] {
          new Point(40,  3), new Point(40, 35),
          new Point(32, 31), new Point(32, 11)
         };

apt[3] = new Point[] {
          new Point( 3, 36), new Point(11, 32),
          new Point(31, 32), new Point(39, 36),
          new Point(31, 40), new Point(11, 40)
         };

apt[4] = new Point[] {
          new Point( 2, 37), new Point(10, 41),
          new Point(10, 61), new Point( 2, 69)
         };

apt[5] = new Point[] {
          new Point(40, 37), new Point(40, 69),
          new Point(32, 61), new Point(32, 41)
         };

apt[6] = new Point[] {
          new Point(11, 62), new Point(31, 62),
          new Point(39, 70), new Point( 3, 70)
         };
}

public SizeF MeasureString(string str, Font font)
{
SizeF sizef = new SizeF(0, grfx.DpiX * font.SizeInPoints / 72);

for (int i = 0; i < str.Length; i++)
{
if (Char.IsDigit(str[i]))
{
sizef.Width += 42 * grfx.DpiX * font.SizeInPoints / 72 / 72;
}
else if (str[i] == '-')
{
sizef.Width += 42 * grfx.DpiX * font.SizeInPoints / 72 / 72;
}
else if (str[i] == ':')
{
sizef.Width += 20 * grfx.DpiX * font.SizeInPoints / 72 / 72;
}
else if (str[i] == ' ')
{
sizef.Width += 36 * grfx.DpiX * font.SizeInPoints / 72 / 72;
}
}
return sizef;
}

public void DrawString(string str, Font font, Brush brush, float x, float y)
{
this._brush = brush;
this._shadowBrush = new SolidBrush(Color.FromArgb(40, ((SolidBrush)this._brush).Color));

for (int i = 0; i < str.Length; i++)
{
if (Char.IsDigit(str[i]))
{
x = Number(str[i] - '0', font, brush, x, y);
}
else if (str[i] == '-')
{
x = MinusSign(font, brush, x, y);
}
else if (str[i] == ':')
{
x = Colon(font, brush, x, y);
}
else if (str[i] == ' ')
{
x = DrawSpace(font, brush, x, y);
}
}
}

private float Number(int num, Font font, Brush brush, float x, float y)
{
for (int i = 0; i < apt.Length; i++)
{
if (_isDrawShadow)
{
Fill(apt[i], font, _shadowBrush, x, y);
}
if (bySegment[num, i] == 1)
{
Fill(apt[i], font, brush, x, y);
}
}
return x + 42 * grfx.DpiX * font.SizeInPoints / 72 / 72;
}

private float MinusSign(Font font, Brush brush, float x, float y)
{
Fill(apt[3], font, brush, x, y);
return x + 42 * grfx.DpiX * font.SizeInPoints / 72 / 72;
}

private float DrawSpace(Font font, Brush brush, float x, float y)
{
return x + 36 * grfx.DpiX * font.SizeInPoints / 72 / 72;
}

private float Colon(Font font, Brush brush, float x, float y)
{
Point[][] apt = new Point[2][];

apt[0] = new Point[] {
          new Point( 4, 12), new Point( 16, 12),
          new Point(16, 24), new Point( 4, 24)
         };

apt[1] = new Point[] {
          new Point( 4, 50), new Point( 16, 50),
          new Point(16, 62), new Point( 4, 62)
         };

for (int i = 0; i < apt.Length; i++)
{
Fill(apt[i], font, brush, x, y);
}

return x + 20 * grfx.DpiX * font.SizeInPoints / 72 / 72;
}

private void Fill(Point[] apt, Font font, Brush brush, float x, float y)
{
PointF[] aptf = new PointF[apt.Length];

for (int i = 0; i < apt.Length; i++)
{
aptf[i].X = x + apt[i].X * grfx.DpiX * font.SizeInPoints / 72 / 72;
aptf[i].Y = y + apt[i].Y * grfx.DpiY * font.SizeInPoints / 72 / 72;
}

grfx.FillPolygon(brush, aptf);
}
}
}