/// <summary>TODO</summary>
protected override void RenderMap(Graphics g)
{
if (g == null)
{
throw new ArgumentNullException("g");
}
using (var brush = new SolidBrush(this.BackColor)) g.FillRectangle(brush, ClientRectangle);
g.ScaleTransform(1.0f / MapScale, 1.0f / MapScale);
MapBuffer.Render(g, Point.Empty, ClientSize);
}
/// <summary>TODO</summary>
/// <param name="delta"></param>
/// <returns>Clipping rectangle requiring re-painting.</returns>
protected virtual Rectangle VerticalScrollBufferedGraphics(int delta)
{
if (delta == 0)
{
return(Rectangle.Empty);
}
// Render(MapBuffer, MapSpare.Graphics, new Point(0,-delta));
MapBuffer.Render(MapSpare.Graphics, new Point(0, -delta), ClientSize);
var temp = MapBuffer; MapBuffer = MapSpare; MapSpare = temp;
if (delta < 0)
{
return(new Rectangle(0, 0, ClientSize.Width, -delta));
}
else
{
return(new Rectangle(0, ClientSize.Height - delta, ClientSize.Width, delta));
}
}