C#

cyn8 wrote:

Graphics objGraphics;

cyn8 wrote:

Control.MousePosition;

Christian Graus wrote:

Why do you have a member graphics object ? I don't see how that's ever a good idea.

private Graphics panelGraphics = null;
private Pen leftPen = new Pen(Color.Red,2);
private Pen rightPen = new Pen(Color.White,2);
private Point oldPosition;
private bool init=false;

private void panel2_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
    if((e.Button == MouseButtons.Left) || (e.Button == MouseButtons.Right))
    {
        Pen actPen;
        if(e.Button == MouseButtons.Left)
        {
            actPen = leftPen;
        }
        else
        {
            actPen = rightPen;
        }

        if(panel2.BackgroundImage==null)
            panel2.BackgroundImage= new Bitmap(panel2.Width, panel2.Height);

        if(panelGraphics==null)
            panelGraphics = Graphics.FromImage(panel2.BackgroundImage);

        if(init)
        {
            Point newPostion = new Point(e.X,e.Y);
            panelGraphics.DrawLine(actPen, oldPosition, newPostion);
            Refresh();
        }
        init=true;

        oldPosition = new Point(e.X,e.Y);
    }
}

private void panel2_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
    init=false;
}

private void panel2_MouseLeave(object sender, System.EventArgs e)
{
    init=false;
}

originSH wrote:

Why not just use the sockets stuff in .Net?