.NET (Core and Framework)

HL42 wrote:

I couldn't find anything like this googling.

HL42 wrote:

I'm looking for a class in .NET (preferably C#).

NetQuestions wrote:

Was it because of size.

myForm.Controls.Add(myPanel);

private void AddNewData() {
	int w=plot.Width;
	int h=plot.Height;
	int x=dataCount%w;
	bmg.DrawLine(Pens.Yellow, x, 0, x, h);
	int y=(int)(h*(0.5+0.45*Math.Sin(dataCount*0.07)));
	if (oldy<0) oldy=y;
	bmg.DrawLine(Pens.Black, x, oldy, x, y);
	oldy=y;
        dataCount++;
}

            g = pe.Graphics;

            int H = myBitmap.Height;
            int W = myBitmap.Width;

            Rectangle rect = new Rectangle(0, 0, W, H);
            myBitmapData = myBitmap.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite, myBitmap.PixelFormat);

            // Get the address of the first line.
            IntPtr ptr = myBitmapData.Scan0;

            // Declare an array to hold the bytes of the bitmap.
            int bytes = myBitmapData.Stride * H;
            byte[] rgbValues = new byte[bytes];

            // Copy the RGB values into the array.
            System.Runtime.InteropServices.Marshal.Copy(ptr, rgbValues, 0, bytes);

            // Shift the first N-1 columns one pixel to the right
            for (int ii = 0; ii < H; ii++)
                for (int jj = (ii + 1) * (3 * W) - 1; jj > (ii * W * 3) + 3; jj -= 3)
                {
                    rgbValues[jj] = rgbValues[jj-3];
                    rgbValues[jj-1] = rgbValues[jj-4];
                    rgbValues[jj-2] = rgbValues[jj-5];
                }

            // fill in some random data in the first column
            int offset = W * 3;
            for (int counter = 0; counter < H; counter += 1)
            {
                rgbValues[counter * offset] = (byte)rnd.Next(255);
                rgbValues[counter * offset + 1] = (byte)rnd.Next(255);
                rgbValues[counter * offset + 2] = (byte)rnd.Next(255);
            }

            // Copy the RGB values back to the bitmap
            System.Runtime.InteropServices.Marshal.Copy(rgbValues, 0, ptr, bytes);

            // Unlock the bits.
            myBitmap.UnlockBits(myBitmapData);
            myPanel.Location = new Point(XREF, YREF);
            myPanel.Width = myBitmap.Width;
            myPanel.Height = myBitmap.Height;
            myPanel.BackgroundImage = myBitmap;
            this.Controls.Add(myPanel);

My panel class (read that double buffering with a panel should be done like this):

   public class DoubleBufferPanel : Panel
        {
            public DoubleBufferPanel()
            {
                // Set the value of the double-buffering style bits to true.
                this.SetStyle(ControlStyles.DoubleBuffer |
                ControlStyles.UserPaint |
                ControlStyles.AllPaintingInWmPaint,
                true);
                this.UpdateStyles();
            }
        }