Tutorial

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;
using SimpleGraphics;
using SimpleGeometry;
using SimpleGeometry.factories;

namespace TestLab
{
    public partial class Form1 : Form
    {
        private ISimpleGraphics _gh;
        public Form1()
        {
            InitializeComponent();

            //create new theadsafe GraphicsHelper object
            //with a new GCanvas object that holds the reference to the Form object
            _gh = new GraphicsHelperThreadSafe(
                new GCanvas(this));

            //set offset for y inversion (typically 30)
            _gh.setCanvasYOffset(
                new GNumericValue(30));
            //_gh.setAxisSwapMode(AxisSwapMode.INVERTYAXIS);
        }

        private void Form1_Click(object sender, EventArgs e)
        {
            //clear
            _gh.paintClearingRectangle(_gh.BackgroundColor);

            //create a line with 2 points
            IWinPoint p1 = new WinPoint(100, 100);
            IWinPoint p2 = new WinPoint(200, 600);
            ILine line = new GLine(p1, p2);

            //create a numerical value
            INumericValue distance = new GNumericValue(65);

            //paint a circle
            _gh.paintEllipse(Color.Blue, 2, p1,
                new GNumericValue(80));

            //create an anchor point and a rectangle
            IWinPoint pRect = new WinPoint(line.getPointOnLine(distance));
            IRectangle rect = new GRectangle(pRect, new GNumericValue(60), .7);

            //a block is a quare
            IWinPoint pBlock = new WinPoint(line.getPointOnLine(pRect, distance));
            IBlock block = new GBlock(pBlock, new GNumericValue(50));

            //a box is an extended rectangle that is optimized for painting
            IWinPoint pBox = new WinPoint(line.getPointOnLine(pBlock, distance));
            IBox box = new GBox(pBox, new GNumericValue(70), .4);

            //a figure is a very rudimentary direction indicator
            IWinPoint pFigure = new WinPoint(line.getPointOnLine(pBox, distance));
            IFigure f = new GFigure("a", pFigure, new GNumericValue(90), new GNumericValue(20));

            //now paint all that
            //notice how the figures are located along the line that was first created
            //their anchor point has the same distance
            _gh.paintLine(Color.Yellow, 1, line);
            _gh.paintPolygon(Color.Black, 1, rect.Polygon);
            _gh.paintBlock(Color.Red, 2, block);
            _gh.paintBox(Color.YellowGreen, 4, box);
            _gh.paintFigure(f, Color.Green, 2, Color.Tomato, 2, 100);

            //clear
            _gh.paintClearingRectangle(_gh.BackgroundColor);

            //the block factory has additional methods to do this. execute and see :-)
            BlockFactory bf = new BlockFactory();
            for (int i = 1; i < 400; i++)
            {
                line = new GLine(
                    new WinPoint(300, 300), new GNumericValue(i), new GNumericValue(140));
                block = bf.createNew(line.P2, new GNumericValue(35), false);
                _gh.paintBlock(Color.Blue, 2, block);
            }
            _gh.paintEllipse(Color.Black, 1, line.P1, new GNumericValue(140));
        }
    }
}