ClockControl.cs
using System;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;
namespace ClockTime
{
/// <summary>
/// ClockControl 的摘要说明。
/// </summary>
public class ClockControl:System.Windows.Forms.UserControl
{
private DateTime dt;
public ClockControl()
{
//
// TODO: 在此处添加构造函数逻辑
//
this.ResizeRedraw=true;
this.Enabled=false;
}
public DateTime Time
{
set
{
Graphics grfx=this.CreateGraphics();
Pen pn=new Pen(this.BackColor);
InitializeCoordinates(grfx);
if(dt.Hour!=value.Hour)
{
DrawHourHand(grfx,pn);
}
if(dt.Minute!=value.Minute)
{
DrawHourHand(grfx,pn);
DrawMinuteHand(grfx,pn);
}
if(dt.Second!=value.Second)
{
DrawMinuteHand(grfx,pn);
DrawSecondHand(grfx,pn);
}
if(dt.Millisecond!=value.Millisecond)
{
DrawSecondHand(grfx,pn);
}
dt=value;
pn=new Pen(ForeColor);
DrawHourHand(grfx,pn);
DrawMinuteHand(grfx,pn);
DrawSecondHand(grfx,pn);
grfx.Dispose();
}
get
{return dt;
}
}
protected override void OnPaint(PaintEventArgs e)
{
Graphics grfx=e.Graphics;
Pen pn=new Pen(ForeColor);
SolidBrush br=new SolidBrush(ForeColor);
InitializeCoordinates(grfx);
DrawDots(grfx,br);
DrawHourHand(grfx,pn);
DrawSecondHand(grfx,pn);
DrawMinuteHand(grfx,pn);
}
protected virtual void InitializeCoordinates(Graphics grfx)
{
if(this.Width==0 || this.Height==0) return;
grfx.TranslateTransform(this.Width/2,this.Height/2);
Single fInches=Math.Min(this.Width/grfx.DpiX,this.Height/grfx.DpiY);
grfx.ScaleTransform(fInches*grfx.DpiX/2000,fInches*grfx.DpiY/2000);
}
protected virtual void DrawDots(Graphics grfx ,Brush br)
{
int i,iSize;
for(i=0;i<=59;i++)
{
if(i%5==0)
{
iSize=100;
}
else
iSize=30;
grfx.FillEllipse(br,0-iSize/2,-900-iSize/2,iSize,iSize);
grfx.RotateTransform(6);
}
}
protected virtual void DrawHourHand(Graphics grfx,Pen pn)
{
GraphicsState gs=grfx.Save();
grfx.RotateTransform(360.0F*Time.Hour/12+30.0F*Time.Minute/60);
grfx.DrawPolygon(pn,new Point[]{new Point(0,150),new Point(100,0),new Point(0,-600),new Point(-100,0)});
grfx.Restore(gs);
}
protected virtual void DrawMinuteHand(Graphics grfx,Pen pn)
{
GraphicsState gs=grfx.Save();
grfx.RotateTransform(360.0F*Time.Minute/60+6.0F*Time.Second/60);
grfx.DrawPolygon(pn,new Point[]{new Point(0,200),new Point(50,0),new Point(0,-800),new Point(-50,0)});
grfx.Restore(gs);
}
protected virtual void DrawSecondHand(Graphics grfx,Pen pn)
{
GraphicsState gs=grfx.Save();
grfx.RotateTransform(360.0F*Time.Second/60+6.0F*Time.Millisecond/1000);
grfx.DrawLine(pn,0,0,0,-800);
grfx.Restore(gs);
}
}
}
form1.cs
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using ClockTime;
namespace ClockTime
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.ComponentModel.IContainer components;
private System.Windows.Forms.Timer tmr;
private ClockTime.ClockControl clkctrl;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// 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.components = new System.ComponentModel.Container();
this.clkctrl = new ClockTime.ClockControl();
this.tmr = new System.Windows.Forms.Timer(this.components);
this.SuspendLayout();
//
// clkctrl
//
this.clkctrl.BackColor = System.Drawing.Color.Black;
this.clkctrl.Dock = System.Windows.Forms.DockStyle.Fill;
this.clkctrl.Enabled = false;
this.clkctrl.ForeColor = System.Drawing.Color.White;
this.clkctrl.Location = new System.Drawing.Point(0, 0);
this.clkctrl.Name = "clkctrl";
this.clkctrl.Size = new System.Drawing.Size(292, 273);
this.clkctrl.TabIndex = 0;
this.clkctrl.Time = new System.DateTime(2005, 6, 24, 10, 19, 26, 62);
//
// tmr
//
this.tmr.Enabled = true;
this.tmr.Interval = 1000;
this.tmr.Tick += new System.EventHandler(this.tmr_Tick);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.BackColor = System.Drawing.SystemColors.Window;
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.Add(this.clkctrl);
this.ForeColor = System.Drawing.SystemColors.WindowText;
this.Name = "Form1";
this.Text = "ClockControl";
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void tmr_Tick(object sender, EventArgs e)
{
clkctrl.Time=DateTime.Now;
}
}
}
编译过程:
csc /t:library clockcontrol.cs
csc /t:winexe /r:clockcontrol.dll form1.cs
