C# Penis Drawer

using System;
using System.Drawing;
using System.Windows.Forms;

namespace Canvas
{
    internal enum Tool
    {
        Brush = 0,
        Line = 1,
        Circles = 2,
        Eraser = 3
    }

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private Color BrushColor = Color.Black;
        private Tool CurrentTool = Tool.Brush;
        private Graphics Canvas;
        private bool IsDrawing = false;
        private Point Point1;
        private Point Point2;

        private void InitializeCanvas()
        {
            Canvas = canvas.CreateGraphics();
        }

        private void SetAppState(string state)
        {
            statusBar.Text = state;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            SetAppState("Ready");
            UpdateColor();
            InitializeCanvas();
            SetCursor(Cursors.Cross);
        }

        private void UpdateColor()
        {
            colorIndicator.BackColor = BrushColor;
        }

        private void SetColor(Color color)
        {
            this.BrushColor = color;
            UpdateColor();
        }

        private void colorPickerButton_Click(object sender, EventArgs e)
        {
            DialogResult result = colorDialog1.ShowDialog();
            if (result == DialogResult.OK)
            {
                SetColor(colorDialog1.Color);
            }
        }

        private void brushToolButton_CheckedChanged(object sender, EventArgs e)
        {
            CurrentTool = Tool.Brush;
            SetCursor(Cursors.Cross);
        }

        private void canvas_MouseDown(object sender, MouseEventArgs e)
        {
            Point1 = new Point(e.X, e.Y);
            IsDrawing = true;
            SetAppState("Drawing");
        }

        private void DrawLine(Point pt1, Point pt2)
        {
            DrawLine(pt1, pt2, GetLineSz());
        }

        private void DrawLine(Point pt1, Point pt2, int sz)
        {
            Pen pen = new Pen(new SolidBrush(CurrentTool != Tool.Eraser ? BrushColor : Color.White), sz);
            Point[] points = { pt1, pt2 };
            int tensity = GetInt(tensityTb.Text);
            Canvas.DrawCurve(pen, points, tensity);
        }

        private void canvas_MouseUp(object sender, MouseEventArgs e)
        {
            if (CurrentTool == Tool.Line)
            {
                Point2 = new Point(e.X, e.Y);
                DrawLine(Point1, Point2);
            };
            IsDrawing = false;
            SetAppState("Ready");
        }

        private void DrawCircle(Point pt, int sz)
        {
            Pen pen = new Pen(BrushColor);
            Canvas.DrawEllipse(pen, pt.X, pt.Y, sz, sz);
        }

        private void canvas_MouseMove(object sender, MouseEventArgs e)
        {
            if(IsDrawing)
            {
                if (CurrentTool == Tool.Brush || CurrentTool == Tool.Eraser)
                {
                    Point2 = new Point(e.X, e.Y);
                    DrawLine(Point1, Point2);
                    Point1 = Point2;
                }
                else if (CurrentTool == Tool.Circles)
                {

                    Point pt = new Point((new Random()).Next(10, 500), (new Random()).Next(10, 500));
                    DrawCircle(pt, (new Random()).Next(10, 5000));
                }
            }
        }

        private int GetInt(string str)
        {
            try
            {
                return Int32.Parse(str);
            }
            catch (FormatException)
            {
                return 0;
            }
        }

        private int GetLineSz()
        {
            return GetInt(brushSz.Text);
        }

        private void ClearCanvas()
        {
            canvas.Image = null;
        }

        private void clearCanvasButton_Click(object sender, EventArgs e)
        {
            ClearCanvas();
        }

        private void SetCursor(Cursor cursor)
        {
            canvas.Cursor = cursor;
        }

        private void rubberToolButton_CheckedChanged(object sender, EventArgs e)
        {
            CurrentTool = Tool.Eraser;
            SetCursor(Cursors.Hand);
        }

        private void lineToolButton_CheckedChanged(object sender, EventArgs e)
        {
            CurrentTool = Tool.Line;
        }

        private void circlesToolButton_CheckedChanged(object sender, EventArgs e)
        {
            CurrentTool = Tool.Circles;
            SetCursor(Cursors.WaitCursor);
        }
    }
}