flip coordinates when drawing to control

Question

I am drawing a graph on a control, but 0,0 is at the top-left hand corner of the control. Is there a way to flip the coordinates so that 0,0 is at the lower left corner of t

Answer 1

Here's a simple UserControl that demonstrates how to do this:

public partial class UserControl1 : UserControl
{
    public UserControl1()
    {
        SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint | ControlStyles.DoubleBuffer, true);

        InitializeComponent();
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        e.Graphics.ScaleTransform(1.0F, -1.0F);
        e.Graphics.TranslateTransform(0.0F, -(float)Height);
        e.Graphics.DrawLine(Pens.Black, new Point(0, 0), new Point(Width, Height));

        base.OnPaint(e);
    }
}