private void Form1_Paint(object sender, PaintEventArgs e)
{
SolidBrush brush = new SolidBrush(Color.Gray);
if (memGraphics.CanDoubleBuffer())
{
// Fill in Background (for effieciency only the area that has been clipped)
memGraphics.g.FillRectangle(new SolidBrush(SystemColors.Window),
e.ClipRectangle.X, e.ClipRectangle.Y,
e.ClipRectangle.Width, e.ClipRectangle.Height);
// Do our drawing using memGraphics.g instead e.Graphics
memGraphics.g.FillRectangle(brush, this.ClientRectangle);
if (myPane != null)
{
myPane.Draw(memGraphics.g);
}
// Render to the form
memGraphics.Render(e.Graphics);
}
else // if double buffer is not available, do without it
{
e.Graphics.FillRectangle(brush, this.ClientRectangle);
if (myPane != null)
{
myPane.Draw(e.Graphics);
}
}
}
/// <summary>
/// Render content to a bitmap.
/// </summary>
protected override void Render(Bitmap bitmap, Rectangle renderRect)
{
using (var graphics = Graphics.FromImage(bitmap))
{
graphics.SetClip(renderRect);
_graphPane.ReSize(graphics, new RectangleF(0, 0, bitmap.Width, bitmap.Height));
_graphPane.Draw(graphics);
}
}
