/// <summary>Paint the top layer of the display, graphics that changes frequently between refreshes.</summary>
/// <param name="this">Type: MapDisplay{THex} - The map to be painted.</param>
/// <param name="graphics">Graphics object for the canvas being painted.</param>
public static void PaintHighlight <THex>(this MapDisplay <THex> @this, Graphics graphics
) where THex : MapGridHex
{
if (graphics == null)
{
throw new ArgumentNullException("graphics");
}
var container = graphics.BeginContainer();
graphics.Transform = @this.TranslateToHex(@this.StartHex);
graphics.DrawPath(Pens.Red, @this.HexgridPath);
if (@this.ShowPath)
{
graphics.EndContainer(container); container = graphics.BeginContainer();
@this.PaintPath(graphics, @this.Path);
}
if (@this.ShowRangeLine)
{
graphics.EndContainer(container); container = graphics.BeginContainer();
var target = @this.CentreOfHex(@this.HotspotHex);
graphics.DrawLine(Pens.Red, @this.CentreOfHex(@this.StartHex), target);
graphics.DrawLine(Pens.Red, target.X - 8, target.Y - 8, target.X + 8, target.Y + 8);
graphics.DrawLine(Pens.Red, target.X - 8, target.Y + 8, target.X + 8, target.Y - 8);
}
graphics.EndContainer(container);
}
