winform制作的精美时钟

参考了好多资料，终于做了一个winform时钟出来，效果图如下：



1，首先在winfrom项目中添加了一个用户控件ClockControl，实现过程可见代码注释，代码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;

namespace WinClock
{
public partial class ClockControl : UserControl
{
const int screenWidth = 200; //屏幕宽度
const int screenHeight = 200; //屏幕高度
public ClockControl()
{
InitializeComponent();

this.Width = screenWidth + 1;
this.Height = screenHeight + 1;
this.DoubleBuffered = true; //控件缓冲，避免闪烁
this.SetStyle(ControlStyles.ResizeRedraw, true);
clockTimer.Start();
}
private void clockTimer_Tick(object sender, EventArgs e)
{
Invalidate();
}
protected override void OnPaint(PaintEventArgs e)
{
DateTime dtNow = DateTime.Now;
string dayOfWeek = dtNow.ToString("dddd", new System.Globalization.CultureInfo("zh-cn"));//星期几
Brush brush = new SolidBrush(Color.Black); //填充图形
Pen pen = new Pen(Color.Black); //画笔
Font hourFont = new Font("Arial", 10, FontStyle.Bold);//时钟数字的字体
Font dateFont = new Font("Arial", 9); //日期的字体
int dialRadius = Math.Min(screenWidth, screenHeight) / 2; //圆的半径

Graphics g = e.Graphics;
g.SmoothingMode = SmoothingMode.HighQuality;

//默认坐标系统原点是左上角，现在把原点移到屏幕中心, 右下左上对应的轴：x,y,-x,-y
g.TranslateTransform(dialRadius, dialRadius);

//画时钟最外层的圆线(pen,x,y,width,height)
//圆的中心点坐标计算：(width/2+x,height/2+y),据此可得出要使圆在坐标原点(0,0)的x,y坐标值
g.DrawEllipse(pen, -screenWidth / 2, -dialRadius, screenWidth, screenHeight);

GraphicsState state = g.Save();
//画矩形、日期、星期几
int rectWidth = 70;
int rectHeight = 30;
g.DrawRectangle(pen, -rectWidth / 2, rectHeight, rectWidth, rectHeight);
g.DrawString(dtNow.ToString("yyyy-MM-dd"), dateFont, brush, -rectWidth / 2, rectHeight + 2);
g.DrawString(dayOfWeek.PadLeft(8, ' '), dateFont, brush, -rectWidth / 2, rectHeight + 15);
g.Restore(state);

// 画时钟的60个圆点
//Save(),Restore(state)配合使用，使得平移、缩放、旋转等操作只对它们作用域之间的代码有效，
//save开始到restore之间这绘画，就像有绘制了一个图层，restore之后将两个图层放到一起
state = g.Save();
for (int i = 0; i < 60; i++)
{
int w = i % 5 == 0 ? 5 : 3;
g.FillEllipse(brush, 0, -dialRadius, w, w);
//围绕指定点按照顺时针方向旋转角度360 / 60 = 6度
g.RotateTransform(6);
}
g.Restore(state);

//画时钟的12个数字，如果用上面RotateTransform方法则数字会倾斜、倒立，故不用
state = g.Save();
for (int i = 0; i < 12; i++)
{
//已知圆中心占坐标(x0,y0),半径r，角度a0,则圆上任一点坐标（x,y）计算：
//x = x0 + r * cos(ao * 3.14 /180)
//y = y0 + r * sin(ao * 3.14 /180)
Point point = new Point(-6, -6); //当为(0,0)时全部数字偏右下移，故手动调整
double dd = Math.PI / 180 * i * (360 /12); //每次转360/12度
float x = point.X + (float)((dialRadius - 12) * Math.Cos(dd));
float y = point.Y + (float)((dialRadius - 12) * Math.Sin(dd));

//因为是从顺时钟3点钟开始画，所以索引i需要加上3
int j = i + 3;
if (j > 12)
j = j - 12;
g.DrawString(j.ToString(), hourFont, brush, x, y);
}
g.Restore(state);

// 画时钟的图形
state = g.Save();
g.RotateTransform((dtNow.Hour - 12 + dtNow.Minute / 60f) * 360f / 12f);
//时钟指针默认指向12点钟方向,分钟指针也一样
g.DrawPolygon(new Pen(brush), new Point[]
{
new Point(0,  20), new Point( 10, 0),
new Point(0, -60), new Point(-10, 0)
});
g.Restore(state);

// 画分钟的图形
state = g.Save();
g.RotateTransform((dtNow.Minute + dtNow.Second / 60f) * 360f / 60f);
g.DrawPolygon(new Pen(brush), new Point[]
{
new Point(0,  20), new Point( 6, 0),
new Point(0, -80), new Point(-6, 0)
});
g.Restore(state);

// 画秒钟的图形
state = g.Save();
g.RotateTransform(dtNow.Second * 360f / 60f);
g.FillRectangle(brush, -1, -dialRadius + 10, 2, dialRadius);
g.Restore(state);
}
}
}

2，新建一个窗体，拉一个Panel控件上去，在后台代码中写上2行代码，按F5即可看到效果。

private void Form10_Load(object sender, EventArgs e)
{
ClockControl clock = new ClockControl();
panel1.Controls.Add(clock);
}

完整项目下载：

http://download.csdn.net/detail/gdjlc/5121863