C # draw a circular clock

This article is modified by the author's reference to some cases:

The reference links are as follows:

http://blog.csdn.net/xuemoyao/article/details/8001113

Http://wenku.baidu.com/view/1221d6522f60ddccda38a0e7

(1) Final effect

(2) Program Realization Analysis:

Use the Paint event to draw, and then add a timer that is set to update 1000 milliseconds.

(3) Specific methods

In the form form (set size to 300*300), add Time1, the property enabled to True,interval set to 1000

And then add it under the Form1 property definition in Designer.cs.

This. Paint + = new System.Windows.Forms.PaintEventHandler (this. Form1_paint);

Add a function under the Form1 class in Form1.cs

Private void Form_paint (Object Sender,painteventargs e)

{

Graphics G=e.graphics; Defines g as the canvas for the form control

　　int r=100;

　　Draw a digital clock

Rectangle r1=new Rectangle (50,10,200,20);

parameter is the upper-left corner of the rectangle coordinates, width and length

G.fillrectangle (BRUSHES.CHOCOLATE,R1);//Fill Color

int Ss=datetime.now.second;

int Mm=datetime.now.minute;

int hh=datetime.now.hour;

String s=convert.tostring (ss);

String m=convert.tostring (mm);

String h=convert.tostring (HH);

if (ss>=0&&ss<=9)

s= "0" +s;

if (mm>=0&&mm<=9)

m= "0" +M;

if (hh>=0&&hh<=9)

H= "0" +H;

Font f1=new font ("Song Body", 12,fontstyle.bold);

StringFormat sf1=new StringFormat ();

SolidBrush s1=new SolidBrush (color.white);

g.DrawString ("Current Time" +h+ ":" +m+ ":" +S,F1,S1,R1,SF1);

g.DrawString ("Current Time" + H + ":" + M + ":" + S, F1, S1, R1, SF1);

Draw a circular outline

G.fillellipse (brushes.white,50,50,200,200)

G.drawellipse (New Pen (color.red,2), 46,46,208,208);

G.drawellipse (New Pen (Color.darkgray, 1), 50, 50, 200, 200);

Draw a digital scale

G.resettransform ();

G.translatetransform (150, 150); Reposition coordinates

Font drawfont = new Font ("Arial", 12);

SolidBrush Drawbrush = new SolidBrush (color.black);

E.graphics.drawstring ("6", Drawfont, drawbrush,-7,70);

E.graphics.drawstring ("n", Drawfont, Drawbrush,-9,-80);

E.graphics.drawstring ("3", Drawfont, Drawbrush, 70,-7);

E.graphics.drawstring ("9", Drawfont, Drawbrush,-80,-7);

Draw a scale

for (int z = 0; z <; z++)

{

G.smoothingmode=system.drawing.drawing2d

. smoothingmode.highquality;

　　　Makes the drawn pointer smoother, higher quality

G.resettransform;

G.translatetransform (150,150); Change the origin of coordinates

G.rotateyransform (Z*5); Rotate, rotate 6 degrees per second

if (z%5==0)

G=drawline (New Pen (color.black,3.0f). r-12,0,r-5,0);

Hour scale

Else

G.drawline (New Pen (color.black,1.5f), r-8,0,r-5,0);

Minute standard scale

}

Draw the second hand

G.resettransform (); Restore Default state

G.translatetransform (150,150);

G.rotatetransform (ss*6+270);

The x-axis of the horizontal line starts from the vertical and rotates 6 degrees at a time.

Pen secpen=new Pen (color.red,1);

Secpen.startcap=system.drawing.drawing2d.linecap.roundanchor;

Draw a line, start with a dot

Secpen.endcap=system.drawing.drawing2d.linecap.arrowanchor;

Draw line, end at Arrow

G.drawline (secpen,0,0,65,0);//65 indicates the length of the line

Draw the minute hand

G.resettransform ();

G.translatetransform (150,150);

G.rotatetransform (mm*6+270);

Pen minpen=new Pen (color.blue,2);

Minpen.startcap = System.Drawing.Drawing2D.LineCap.RoundAnchor;

Minpen.endcap = System.Drawing.Drawing2D.LineCap.ArrowAnchor;

G.drawline (minpen, 0, 0,50, 0);

Draw the hour hand

G.resettransform ();

G.translatetransform (150,150);

G.rotatetransform (hh*30+mm*1/2+270);

Pen Hourpen = new Pen (color.black,3);

Hourpen.endcap = System.Drawing.Drawing2D.LineCap.ArrowAnchor;

G.drawline (hourpen, 0, 0, 35, 0);

}

Response Events for TIME1

private void Timer1_Tick (object sender, EventArgs e)

{

Invalidate ();

}

C # draw a circular clock