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发表于 2010-11-22 10:44:05
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显示全部楼层
给你一个模仿LED的控件
//SevenSegmentClock.cs
namespace LEDClock
{
public partial class SevenSegmentClock : UserControl
{
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;
}
DateTime _dateTime;
//默认使用同时绘制日期和时间
SevenSegmentClockStyle _clockStyle = SevenSegmentClockStyle.DateAndTime;
Color _clockColor = Color.Black;
//是否绘制阴影（即残影），以摸拟真似的LED时钟
bool _isDrawShadow = true;
Timer _timer = null;
//是否自动更新时间
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();
}
}
//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;
}
}
//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 == SevenSegmentClockStyle.TimeOnly)
{
strTime = _dateTime.ToString("T", DateTimeFormatInfo.InvariantInfo);
}
else if (this._clockStyle == SevenSegmentClockStyle.DateOnly)
{
//设置日期格式
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.时钟的样式定义
/// </summary>
public enum SevenSegmentClockStyle
{
DateOnly, // 只显示日期
TimeOnly, // 只显示时间
DateAndTime //显示日期和时间
}
//字符绘制的算法
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))
{
sizef.Width += 42 * grfx.DpiX * font.SizeInPoints / 72 / 72;
}
else if (str == '-')
{
sizef.Width += 42 * grfx.DpiX * font.SizeInPoints / 72 / 72;
}
else if (str == ':')
{
sizef.Width += 20 * grfx.DpiX * font.SizeInPoints / 72 / 72;
}
else if (str == ' ')
{
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))
{
x = Number(str - '0', font, brush, x, y);
}
else if (str == '-')
{
x = MinusSign(font, brush, x, y);
}
else if (str == ':')
{
x = Colon(font, brush, x, y);
}
else if (str == ' ')
{
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, font, _shadowBrush, x, y);
}
if (bySegment[num, i] == 1)
{
Fill(apt, 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, 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.X = x + apt.X * grfx.DpiX * font.SizeInPoints / 72 / 72;
aptf.Y = y + apt.Y * grfx.DpiY * font.SizeInPoints / 72 / 72;
}
grfx.FillPolygon(brush, aptf);
}
}
} |
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