先看效果：
1、首先，定义显示时钟的样式：SevenSegmentClockStyle
//SevenSegmentClockStyle.cs
using System;
namespace BrawDraw.Com.PhotoFrame.Net.PublicFunctions
{
/// <summary>
/// Clock's Style.
/// </summary>
public enum SevenSegmentClockStyle
{
DateOnly,
TimeOnly,
DateAndTime
}
}
如果使用SevenSegmentClockStyle.DateOnly则效果如下：
如果使用SevenSegmentClockStyle.TimeOnly,其效果如下：
2、定义用于显示时间的8字型段码：
//SevenSegmentDisplay.cs
using System;
using System.Drawing;
using System.Windows.Forms;
namespace BrawDraw.Com.PhotoFrame.Net.PublicFunctions
{
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 += 12 * 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( 2, 21), new Point( 6, 17),
new Point(10, 21), new Point( 6, 25)
};
apt[1] = new Point[] {
new Point( 2, 51), new Point( 6, 47),
new Point(10, 51), new Point( 6, 55)
};
for (int i = 0; i < apt.Length; i++)
{
Fill(apt[i], font, brush, x, y);
}
return x + 12 * 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);
}
}
}3、定义时钟控件，从SevenSegmentClock : UserControl继承：
//SevenSegmentClock.cs
using System;
using System.Drawing;
using System.Globalization;
using System.Windows.Forms;
using BrawDraw.Com.PhotoFrame.Net.PublicFunctions;
namespace BrawDraw.Com.PhotoFrame.Net.PublicFunctions
{
public class SevenSegmentClock : UserControl
{
DateTime _dateTime;
SevenSegmentClockStyle _clockStyle = SevenSegmentClockStyle.DateAndTime;
Color _clockColor = Color.Black;
public System.DateTime DateTime
{
get { return this._dateTime; }
set { this._dateTime = value; }
}
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";
// BackColor = Color.White;
ResizeRedraw = true;
//MinimumSize = SystemInformation.MinimumWindowSize + new Size(0, 1);
_dateTime = DateTime.Now;
Timer timer = new Timer();
timer.Tick += new EventHandler(TimerOnTick);
timer.Interval = 100;
timer.Enabled = true;
}
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 pea)
{
DrawClock(pea.Graphics);
}
public void DrawClock(Graphics grfx)
{
this.DrawClock(grfx, this.ClientRectangle);
}
private void InitializeComponent()
{
//
// SevenSegmentClock
//
this.Name = "SevenSegmentClock";
this.Size = new System.Drawing.Size(448, 64);
}
public void DrawClock(Graphics grfx, Rectangle destRect)
{
SevenSegmentDisplay ssd = new SevenSegmentDisplay(grfx);
string strTime = string.Empty;
if(this._clockStyle == SevenSegmentClockStyle.TimeOnly)
{
strTime = _dateTime.ToString("T", DateTimeFormatInfo.InvariantInfo);
}
else if(this._clockStyle == SevenSegmentClockStyle.DateOnly)
{
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);
ssd.DrawString(strTime, font, new SolidBrush(this._clockColor),
(destRect.Width - sizef.Width) / 2,
(destRect.Height - sizef.Height) / 2);
}
}
}5、测试：
//MainFormTest.cs
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using BrawDraw.Com.PhotoFrame.Net.PublicFunctions;
namespace BrawDraw.Com.PhotoFrame.Net.PublicFunctions
{
/// <summary>
/// MainForm 的摘要说明。
/// </summary>
public class MainForm : System.Windows.Forms.Form
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
private BrawDraw.Com.PhotoFrame.Net.PublicFunctions.SevenSegmentClock sevenSegmentClock1;
DateTime dt;
public MainForm()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
sevenSegmentClock1.SevenSegmentClockStyle = SevenSegmentClockStyle.TimeOnly;
MinimumSize = SystemInformation.MinimumWindowSize + new Size(0, 1);
dt = DateTime.Now;
Timer timer = new Timer();
timer.Tick += new EventHandler(TimerOnTick);
timer.Interval = 100;
timer.Enabled = true;
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.sevenSegmentClock1 = new BrawDraw.Com.PhotoFrame.Net.PublicFunctions.SevenSegmentClock();
this.SuspendLayout();
//
// sevenSegmentClock1
//
this.sevenSegmentClock1.BackColor = System.Drawing.Color.Black;
this.sevenSegmentClock1.ClockColor = System.Drawing.Color.GreenYellow;
this.sevenSegmentClock1.DateTime = new System.DateTime(2006, 2, 12, 18, 20, 43, 0);
this.sevenSegmentClock1.Location = new System.Drawing.Point(8, 8);
this.sevenSegmentClock1.Name = "sevenSegmentClock1";
this.sevenSegmentClock1.SevenSegmentClockStyle = BrawDraw.Com.PhotoFrame.Net.PublicFunctions.SevenSegmentClockStyle.DateAndTime;
this.sevenSegmentClock1.Size = new System.Drawing.Size(616, 56);
this.sevenSegmentClock1.TabIndex = 0;
//
// MainForm
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(624, 253);
this.Controls.Add(this.sevenSegmentClock1);
this.Name = "MainForm";
this.Text = "MainForm";
this.ResumeLayout(false);
}
#endregion
public static void Main()
{
Application.Run(new MainForm());
}
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 != dt)
{
dt = dtNow;
Invalidate();
}
}
protected override void OnPaint(PaintEventArgs pea)
{
// sevenSegmentClock1.DrawClock(pea.Graphics);
}
}
}