/// <summary>Returns a DirectedPath composed by extending this DirectedPath by one hex.</summary>
internal DirectedPathCollection(IDirectedPathCollection pathSoFar, DirectedPathStepHex pathStep, int totalCost)
{
PathStep = pathStep;
PathSoFar = pathSoFar;
TotalCost = totalCost;
TotalSteps = pathSoFar == null ? 0 : pathSoFar.TotalSteps + 1;
}
/// <summary>Paint the direction and destination indicators for each hex of the current shortest path.</summary>
/// <param name="dc">Type: Graphics - Object representing the canvas being painted.</param>
/// <param name="path">Type: <see cref="IDirectedPath"/> -
/// A directed path (ie linked-list> of hexes to be highlighted with a direction arrow.</param>
protected virtual void PaintPathArrow(DrawingContext graphics, IDirectedPathCollection path)
{
if (graphics == null)
{
throw new ArgumentNullException("graphics");
}
if (path == null)
{
throw new ArgumentNullException("path");
}
graphics.PushTransform(new TranslateTransform(CentreOfHexOffset.Width, CentreOfHexOffset.Height));
if (path.PathSoFar == null)
{
PaintPathDestination(graphics);
}
else
{
PaintPathArrow(graphics, path.PathStep.HexsideEntry);
}
graphics.Pop();
}
/// <summary>Paint the current shortese path.</summary>
/// <param name="dc">Type: Graphics - Object representing the canvas being painted.</param>
/// <param name="path">Type: <see cref="IDirectedPath"/> -
/// A directed path (ie linked-list> of hexes to be painted.</param>
protected virtual void PaintPath(DrawingContext graphics, IDirectedPathCollection path)
{
if (graphics == null)
{
throw new ArgumentNullException("graphics");
}
var pen = new Pen(Brushes.Black, 1.0F);
var brush = new SolidColorBrush(Color.FromArgb(78, Colors.PaleGoldenrod.R, Colors.PaleGoldenrod.G, Colors.PaleGoldenrod.B));
while (path != null)
{
var coords = path.PathStep.Hex.Coords;
graphics.PushTransform(TranslateToHex(StartHex));
graphics.DrawGeometry(brush, pen, HexgridPath);
if (ShowPathArrow)
{
PaintPathArrow(graphics, path);
}
path = path.PathSoFar;
}
}
/// <summary>Paint the direction and destination indicators for each hex of the current shortest path.</summary>
/// <param name="this">Type: MapDisplay{THex} - The map to be painted.</param>
/// <param name="graphics">Type: Graphics - Object representing the canvas being painted.</param>
/// <param name="path">Type: <see cref="IDirectedPathCollection"/> -
/// A directed path (ie linked-list> of hexes to be highlighted with a direction arrow.</param>
static void PaintPathArrow <THex>(this MapDisplay <THex> @this, Graphics graphics, IDirectedPathCollection path
) where THex : MapGridHex
{
if (graphics == null)
{
throw new ArgumentNullException("graphics");
}
if (path == null)
{
throw new ArgumentNullException("path");
}
graphics.TranslateTransform(@this.CentreOfHexOffset.Width, @this.CentreOfHexOffset.Height);
if (path.PathSoFar == null)
{
@this.PaintPathDestination(graphics);
}
else
{
@this.PaintPathArrow(graphics, path.PathStep.HexsideEntry);
}
}
/// <summary>Paint the current shortese path.</summary>
/// <param name="this">Type: MapDisplay{THex} - The map to be painted.</param>
/// <param name="graphics">Type: Graphics - Object representing the canvas being painted.</param>
/// <param name="path">Type: <see cref="IDirectedPathCollection"/> -
/// A directed path (ie linked-list> of hexes to be painted.</param>
public static void PaintPath <THex>(this MapDisplay <THex> @this, Graphics graphics, IDirectedPathCollection path
) where THex : MapGridHex
{
if (graphics == null)
{
throw new ArgumentNullException("graphics");
}
using (var brush = new SolidBrush(Color.FromArgb(78, Color.PaleGoldenrod))) {
while (path != null)
{
var coords = path.PathStep.Hex.Coords;
graphics.Transform = @this.TranslateToHex(coords);
graphics.FillPath(brush, @this.HexgridPath);
if (@this.ShowPathArrow)
{
@this.PaintPathArrow(graphics, path);
}
path = path.PathSoFar;
}
}
}
