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How to Draw Circle in C# windows Form |
Posted Date: 02 Oct 2008 Posted By:: Dnyaneshwar Bhamare Member Level: Silver Member Rank: 3729 Points: 1
Responses:
1
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Hi
I have one windows form having a circle on center of the form.I wants to draw a 200 circles around my centered circle and connect that 200 circles to centered circle through the line,without touching the any outer circle.
So any one tell me how do i implement?
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Responses
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#302873 Author:  karthik Member Level: Silver Member Rank: 0 Date: 02/Oct/2008 Rating:  Points: 6 |
To draw circle use this code
//--start
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace circle
{
public partial class Form1 : Form
{
Graphics graphDrawingArea;
Bitmap bmpDrawingArea;
static int mainRadius = 10;
static int smallRadius = 5;
static bool isMax;
static bool smallRadiusMax;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
bmpDrawingArea = new Bitmap(Width, Height);
graphDrawingArea = Graphics.FromImage(bmpDrawingArea);
}
void DrawCentralCircle(int CenterX, int CenterY, int Radius)
{
int start = CenterX - Radius;
int end = CenterY - Radius;
int diam = Radius * 2;
bmpDrawingArea = new Bitmap(Width, Height);
graphDrawingArea = Graphics.FromImage(bmpDrawingArea);
graphDrawingArea.DrawEllipse(new Pen(Color.Blue),start, end, diam, diam);
}
void DrawCornerCircle(int CenterX, int CenterY, int Radius)
{
int start = CenterX - Radius;
int end = CenterY - Radius;
int diam = Radius * 2;
bmpDrawingArea = new Bitmap(Width, Height);
graphDrawingArea = Graphics.FromImage(bmpDrawingArea);
graphDrawingArea.DrawEllipse(new Pen(Color.Red),
start, end, diam, diam);
}
private void timer1_Tick(object sender, EventArgs e)
{
Graphics graph = Graphics.FromHwnd(this.Handle);
int centerX = ClientRectangle.Width / 2;
int centerY = ClientRectangle.Height / 2;
if (isMax == true)
mainRadius--;
else
mainRadius++;
if (mainRadius > (ClientRectangle.Height / 2))
isMax = true;
if (mainRadius < 10)
isMax = false;
if (smallRadiusMax == true)
smallRadius--;
else
smallRadius++;
if (smallRadius > 240)
smallRadiusMax = true;
if (smallRadius < 5)
smallRadiusMax = false;
// Central
DrawCentralCircle(centerX, centerY, mainRadius);
// Top-Left
DrawCornerCircle(centerX / 2, centerY / 2, smallRadius);
// Top-Right
DrawCornerCircle(centerX + (centerX / 2),
centerY / 2, smallRadius);
// Bottom-Left
DrawCornerCircle(centerX / 2, centerY + (centerY / 2),
smallRadius);
// BottomRight
DrawCornerCircle(centerX + (centerX / 2),
centerY + (centerY / 2), smallRadius);
graph.DrawImage(bmpDrawingArea, 0, 0);
}
}
}
//--end
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