/// <summary>
/// Handles the foundNewBestTour event of the tsp control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="SalesmanEventArgs"/> instance containing the event data.</param>
private void salesman_foundNewBestTour(object sender, SalesmanEventArgs e)
{
if (InvokeRequired)
{
try
{
Invoke(new DrawEventHandler(DrawRoute), sender, e);
return;
}
catch (Exception)
{
// ignored
}
}
DrawRoute(sender, e);
}
/// <summary>
/// Draws the route.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="SalesmanEventArgs"/> instance containing the event data.</param>
private void DrawRoute(object sender, SalesmanEventArgs e)
{
lastFitnessValue.Text = Math.Round(e.BestTour.Fitness, 2).ToString(CultureInfo.CurrentCulture);
lastIterationValue.Text = e.Generation.ToString(CultureInfo.CurrentCulture);
if (CityImage == null)
{
CityImage = new Bitmap(tourDiagram.Width, tourDiagram.Height);
CityGraphics = Graphics.FromImage(CityImage);
}
int lastCity = 0;
int nextCity = e.BestTour[0].Connection1;
CityGraphics.FillRectangle(Brushes.White, 0, 0, CityImage.Width, CityImage.Height);
foreach (City city in e.CityList)
{
// Draw a circle for the city.
CityGraphics.DrawEllipse(Pens.Black, city.Location.X - 2, city.Location.Y - 2, 5, 5);
// Draw the line connecting the city.
CityGraphics.DrawLine(Pens.Black, CityList[lastCity].Location, CityList[nextCity].Location);
// figure out if the next city in the list is [0] or [1]
if (lastCity != e.BestTour[nextCity].Connection1)
{
lastCity = nextCity;
nextCity = e.BestTour[nextCity].Connection1;
}
else
{
lastCity = nextCity;
nextCity = e.BestTour[nextCity].Connection2;
}
}
tourDiagram.Image = CityImage;
if (e.Complete)
{
StartButton.Text = "Begin";
StatusLabel.Text = "Click on the mapto place cities";
StatusLabel.ForeColor = Color.Black;
}
}
