WLC_Programming Knowledge

 
private void btnDrawCoordinate_Click(object sender, EventArgs e)
{
    //Create Graphics Object
    Graphics gr = pnPlotArea.CreateGraphics();

    //Get Graphics's Quality
    gr.SmoothingMode = SmoothingMode.HighQuality;

    //Change StartPoint Point(0,0)
    gr.TranslateTransform(pnPlotArea.Width / 2, pnPlotArea.Height / 2);

    //Refresh Background Color of Graphics
    gr.Clear(Color.LightGray);

    //Create Pen Object Specified Color and Width
    using (Pen p = new Pen(Color.Black, 5))
    {
        //Create X and Y axes               
        gr.DrawLine(p, -pnPlotArea.Width / 2, 0, pnPlotArea.Width / 2, 0);
        gr.DrawLine(p, 0, -pnPlotArea.Height / 2, 0, pnPlotArea.Height / 2);

        //Create Font Object Specified FontFamily,Size,Style
        using (Font f = new Font("Courier New", 18, FontStyle.Bold))
        {
            //Create Axes's Label
            gr.DrawString("X", f, Brushes.Blue, pnPlotArea.Width / 2 - 20, -30);
            gr.DrawString("Y", f, Brushes.Blue, -25, -pnPlotArea.Height / 2 + 5);
        }
    }

    //Draw Ticks
    int tick = 50;
    for (int i = -300; i <= 300; i += tick)
    {
        using (Pen p = new Pen(Color.Black, 3))
        {
            if (i != 0)
            {
                //For X-axes's Line
                gr.DrawLine(p, i, 0, i, 10);

                //For Y-axes's Line
                gr.DrawLine(p, 0, i, 10, i);

                //For X-axes's Text
                gr.DrawString(i.ToString(), this.Font, Brushes.Green, i + 5, 5);

                //For Y-axes's Text
                gr.DrawString(i.ToString(), this.Font, Brushes.Green, 5, i + 5);
            }
            else
            {
                //For Point(0,0)
                gr.DrawString("0", this.Font, Brushes.Green, i + 5, 5);
            }
        }
    }
}

 
private void btnDrawStar_Click(object sender, EventArgs e)
{
    //Create Graphics Object
    Graphics gr = pnPlotArea.CreateGraphics();

    //Get Graphics's Quality
    gr.SmoothingMode = SmoothingMode.HighQuality;

    //Change StartPoint Point(0,0)
    gr.TranslateTransform(pnPlotArea.Width / 2, pnPlotArea.Height / 2);

    //Create Pen Object
    Pen p = new Pen(Color.Green, 5);

    //Create Custom Point
    Point[] point = { 
                      new Point(0, -200),
                      new Point(50, -50),
                      new Point(200, -50),
                      new Point(100, 50),
                      new Point(150, 200),
                      new Point(0, 100),
                      new Point(-150, 200),
                      new Point(-100, 50),
                      new Point(-200, -50),
                      new Point(-50, -50),
                      new Point(0, -200)
                  };

    //Drawing Star
    gr.DrawLines(p, point);
}

 //Create Graphics Object on Panel
Graphics gr = this.CreateGraphics();

//Define Graphics Quality
gr.SmoothingMode = SmoothingMode.HighQuality;

//Change Custom Start Point of Graphics
gr.TranslateTransform(100, ClientRectangle.Height / 2);

//Refresh Graphic's BG Color
gr.Clear(Color.Silver);

 //Create Pen Object Specified Color and Width
            using (Pen p = new Pen(Color.Gray, 1))
            {
                //Create X and Y axes
                gr.DrawLine(p, 0, 0, 300, -300);
                gr.DrawLine(p, 0, 0, 300, 300);
                gr.DrawLine(p, 150, -150, 450, 150);
                gr.DrawLine(p, 150, 150, 450, -150);
            }
 

 //Create Fist Arrow with Line Graphics
            int a1 = 150;
            int b1 = -150;
            int a2 = 10;              
            for (int b2 = 10; b2 <= 150; b2 += 10)
            {
                gr.DrawLine(Pens.Gray, a1, b1, a2, b2);
                a1 -= 10;
                b1 += 10;
                a2 += 10;
            }

            //Create Back Arrow with Line Graphics
            int i1 = 150;
            int j1 = -150;
            int i2 = 290;
            for (int j2 = 10; j2 <= 150; j2 += 10)
            {
                gr.DrawLine(Pens.Gray, i1, j1, i2, j2);
                i1 += 10;
                j1 += 10;
                i2 -= 10;
            }

            //Create Second Arrow with Line Graphics
            int c1 = 300;
            int d1 = -300;
            int c2 = 150;            
            for (int d2 = -150; d2 <= 0; d2 += 10)
            {
                gr.DrawLine(Pens.Gray, c1, d1, c2, d2);
                c1 -= 10;
                d1 += 10;
                c2 += 10;
            }

            //Create Third Arrow with Line Graphics
            int e1 = 300;
            int f1 = 0;
            int e2 = 150;
            for (int f2 = 150; f2 <= 300; f2 += 10)
            {
                gr.DrawLine(Pens.Gray, e1, f1, e2, f2);
                e1 -= 10;
                f1 += 10;
                e2 += 10;
            }

            //Create Last Arrow with Line Graphics
            int g1 = 450;
            int h1 = -150;
            int g2 = 310;
            for (int h2 = 10; h2 <= 150; h2 += 10)
            {
                gr.DrawLine(Pens.Gray, g1, h1, g2, h2);
                g1 -= 10;
                h1 += 10;
                g2 += 10;
            }