The following article is
shows about display clock in windows forms using timer control in C#.
For that I am taking one User control and One form to develop this.
First add One User Control.
Select add new item from
solution add one User Control with the name ClockTime and take one timer control in ClockTime user control then
write the following code in .cs file:
using System;
using
System.Collections.Generic;
using
System.ComponentModel;
using
System.Drawing;
using
System.Data;
using
System.Linq;
using
System.Text;
using
System.Windows.Forms;
namespace ClockTime
{
public partial
class ClockTime
: UserControl
{
const float
PI = 3.141592654F;
DateTime dateTime;
float fRadius, fCenterX, fCenterY,
fCenterCircleRadius, fHourLength;
float fMinLength,fSecLength,
fHourThickness,fMinThickness,fSecThickness;
bool
bDraw5MinuteTicks = true;
bool bDraw1MinuteTicks = true;
float fTicksThickness = 2;
Color hrColor = Color.Black;
Color minColor = Color.Black;
Color secColor = Color.Black;
Color circleColor = Color.Black;
Color ticksColor = Color.Black;
//
private System.Windows.Forms.Timer timer1;
private System.ComponentModel.IContainer components;
public ClockTime()
{
InitializeComponent();
}
private void
ClockTime_Load(object sender, EventArgs e)
{
dateTime = DateTime.Now;
this.ClockTime_Resize(sender,
e);
}
private void
timer1_Tick(object sender, EventArgs e)
{
this.dateTime
= DateTime.Now;
this.Refresh();
}
private void
DrawLine(float fThickness, float fLength, Color
color, float fRadians, System.Windows.Forms.PaintEventArgs e)
{
e.Graphics.DrawLine(new Pen(color,
fThickness),
fCenterX - (float)(fLength / 9 * System.Math.Sin(fRadians)),
fCenterY + (float)(fLength / 9 * System.Math.Cos(fRadians)),
fCenterX + (float)(fLength * System.Math.Sin(fRadians)),
fCenterY - (float)(fLength * System.Math.Cos(fRadians)));
}
private void
DrawPolygon(float fThickness, float fLength, Color
color, float fRadians, System.Windows.Forms.PaintEventArgs e)
{
PointF
A = new PointF((float)(fCenterX + fThickness * 2 * System.Math.Sin(fRadians + PI / 2)),
(float)(fCenterY
- fThickness * 2 * System.Math.Cos(fRadians
+ PI / 2)));
PointF
B = new PointF((float)(fCenterX + fThickness * 2 * System.Math.Sin(fRadians - PI / 2)),
(float)(fCenterY
- fThickness * 2 * System.Math.Cos(fRadians
- PI / 2)));
PointF
C = new PointF((float)(fCenterX + fLength * System.Math.Sin(fRadians)),
(float)(fCenterY
- fLength * System.Math.Cos(fRadians)));
PointF
D = new PointF((float)(fCenterX - fThickness * 4 * System.Math.Sin(fRadians)),
(float)(fCenterY
+ fThickness * 4 * System.Math.Cos(fRadians)));
PointF[]
points = { A, D, B, C };
e.Graphics.FillPolygon(new SolidBrush(color),
points);
}
private void
ClockTime_Paint(object sender, PaintEventArgs e)
{
float
fRadHr = (dateTime.Hour % 12 + dateTime.Minute / 60F) * 30 * PI / 180;
float
fRadMin = (dateTime.Minute) * 6 * PI / 180;
float
fRadSec = (dateTime.Second) * 6 * PI / 180;
DrawPolygon(this.fHourThickness, this.fHourLength,
hrColor, fRadHr, e);
DrawPolygon(this.fMinThickness, this.fMinLength,
minColor, fRadMin, e);
DrawLine(this.fSecThickness,
this.fSecLength, secColor, fRadSec, e);
for
(int i = 0; i < 60; i++)
{
if
(this.bDraw5MinuteTicks == true && i % 5 == 0) //
Draw 5 minute ticks
{
e.Graphics.DrawLine(new Pen(ticksColor,
fTicksThickness),
fCenterX + (float)(this.fRadius /
1.50F * System.Math.Sin(i * 6 * PI / 180)),
fCenterY - (float)(this.fRadius /
1.50F * System.Math.Cos(i * 6 * PI / 180)),
fCenterX + (float)(this.fRadius /
1.65F * System.Math.Sin(i * 6 * PI / 180)),
fCenterY - (float)(this.fRadius /
1.65F * System.Math.Cos(i * 6 * PI / 180)));
}
else
if (this.bDraw1MinuteTicks
== true) // draw 1
minute ticks
{
e.Graphics.DrawLine(new Pen(ticksColor,
fTicksThickness),
fCenterX + (float)(this.fRadius /
1.50F * System.Math.Sin(i * 6 * PI / 180)),
fCenterY - (float)(this.fRadius /
1.50F * System.Math.Cos(i * 6 * PI / 180)),
fCenterX + (float)(this.fRadius /
1.55F * System.Math.Sin(i * 6 * PI / 180)),
fCenterY - (float)(this.fRadius / 1.55F * System.Math.Cos(i * 6 * PI / 180)));
}
}
//draw
circle at center
e.Graphics.FillEllipse(new SolidBrush(circleColor),
fCenterX - fCenterCircleRadius / 2, fCenterY - fCenterCircleRadius / 2,
fCenterCircleRadius, fCenterCircleRadius);
}
private void
ClockTime_Resize(object sender, EventArgs e)
{
this.Width
= this.Height;
this.fRadius
= this.Height / 2;
this.fCenterX
= this.ClientSize.Width / 2;
this.fCenterY
= this.ClientSize.Height / 2;
this.fHourLength
= (float)this.Height
/ 3 / 1.85F;
this.fMinLength
= (float)this.Height
/ 3 / 1.20F;
this.fSecLength
= (float)this.Height
/ 3 / 1.15F;
this.fHourThickness
= (float)this.Height
/ 100;
this.fMinThickness
= (float)this.Height
/ 150;
this.fSecThickness
= (float)this.Height
/ 200;
this.fCenterCircleRadius
= this.Height / 50;
timer1.Start();
}
public Color
HourHandColor
{
get
{ return this.hrColor;
}
set
{ this.hrColor = value;
}
}
public Color
MinuteHandColor
{
get
{ return this.minColor;
}
set
{ this.minColor = value;
}
}
public Color
SecondHandColor
{
get
{ return this.secColor;
}
set
{
this.secColor
= value;
this.circleColor
= value;
}
}
public Color
TicksColor
{
get
{ return this.ticksColor;
}
set
{ this.ticksColor = value;
}
}
public bool
Draw1MinuteTicks
{
get
{ return this.bDraw1MinuteTicks;
}
set
{ this.bDraw1MinuteTicks = value; }
}
public bool
Draw5MinuteTicks
{
get
{ return this.bDraw5MinuteTicks;
}
set
{ this.bDraw5MinuteTicks = value; }
}
}
}
Then Design one form with one panel control and Text what ever you want to write in this I
am writing welcome to Nareshkamuni.blogspot.in
My form is like below:
Then write the following code in form.cs file:
Add designed user control to Panel1 in form_Load event:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void
Form1_Load(object sender, EventArgs e)
{
ClockTime
obj = new ClockTime();
panel1.Controls.Add(obj);
}
Then run the application and see output like below:
