/// <summary>
/// OnPaintBackground
/// </summary>
/// <param name="e"></param>
protected override void OnPaintBackground(PaintEventArgs e)
{
#if DESIGN
// prevent designer artifacts
e.Graphics.Clear(this.Parent.BackColor);
needle.Draw(e.Graphics);
#endif
}
/// <summary>
/// OnPaint
/// </summary>
/// <param name="e">PaintEventArgs</param>
protected override void OnPaint(PaintEventArgs e)
{
// double buffer the output
Bitmap b = new Bitmap(bufferBitmap);
Graphics g = Graphics.FromImage(b);
DrawBezel(g);
DrawLines(g);
DrawValue(g);
needle.Angle = valueAngle;
needle.Draw(g);
foreach (Lamp l in lamps)
{
if (l.Visible)
{
l.Draw(g);
}
}
// draw the gauge
e.Graphics.DrawImage(b, 0, 0);
// clean up
b.Dispose();
g.Dispose();
}