Enhanced Painter in C#

(Enhanced Painter) Extend the program of Fig. 14.38 to include options for changing the size and color of the lines drawn. Create a GUI similar to Fig. 14.43. The user should be able to draw on the app’s Panel. To retrieve a Graphics object for drawing, call method panelName.CreateGraphics(), substituting in the name of your Panel.

Program:

using System;
 
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Question8_2_
{
    public partial class Form1 : Form
    {
        bool shouldPaint = false;
        Color pointer = Color.Aqua;
        int ptrsize = 4;
       
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
        }
        private void PainterForm_MouseDown(object sender, MouseEventArgs e)
        {
            // indicate that user is dragging the mouse
            shouldPaint = true;
        }     //end method PainterForm_MouseDown
        // stop painting when mouse button is released
        private void PainterForm_MouseUp(object sender, MouseEventArgs e)
        {
            // indicate that user released the mouse button
            shouldPaint = false;
        }   // end method PainterForm_MouseUp
        // draw circle whenever mouse moves with its button held down
        private void PainterForm_MouseMove(object sender, MouseEventArgs e)
        {
            if (shouldPaint) // check if mouse button is being pressed
            {
                // draw a circle where the mouse pointer is present
                using (Graphics graphics =panel1.CreateGraphics())
                {
                    graphics.FillEllipse( new SolidBrush(pointer), e.X, e.Y, ptrsize, ptrsize);
                } // end
            }

        }
        private void chec(object sender, EventArgs e)
        {
            if(radioButton1.Checked)
            {
                pointer = Color.Red;
            }
        }
        private void radioButton2_CheckedChanged(object sender, EventArgs e)
        {
            if(radioButton2.Checked)
            {
                pointer = Color.Blue;
            }
        }
        private void radioButton3_CheckedChanged(object sender, EventArgs e)
        {
            if (radioButton3.Checked)
            {
                pointer = Color.Green;
            }
        }
        private void radioButton4_CheckedChanged(object sender, EventArgs e)
        {
            if (radioButton4.Checked)
            {
                pointer = Color.Black;
            }
        }
        private void radioButton6_CheckedChanged(object sender, EventArgs e)
        {
            if (radioButton6.Checked)
            {
                ptrsize = 4;
            }
        }
        private void radioButton5_CheckedChanged(object sender, EventArgs e)
        {
            if (radioButton5.Checked)
            {
                ptrsize = 6;
            }
        }
        private void radioButton7_CheckedChanged(object sender, EventArgs e)
        {
            if (radioButton7.Checked)
            {
                ptrsize = 8;
            }
        }
        private void radioButton8_CheckedChanged(object sender, EventArgs e)
        {
            if (radioButton8.Checked)
            {
                pointer = Color.Violet;
            }
        }
        private void radioButton9_CheckedChanged(object sender, EventArgs e)
        {
            if (radioButton9.Checked)
            {
                ptrsize = 12;
            }
        }
    }
}