private void Button_CheckDistance_Click(object sender, RoutedEventArgs e)
{
CheckBoxesOperations.ClearList(cities);
int howManyChecked = CheckBoxesOperations.AddCheckedCheckBoxes(cities, grid);
if (!CheckBoxesOperations.ExactlyTwoChecked(howManyChecked))
{
textBoxDistance.Text = "Make sure that you have marked exactly 2 cities!";
return;
}
LinesOpearions.DeleteLinesIfNeeded(grid);
double distance = Math.Round(Distance.DistanceBetweenTwoCity(cities.CheckBoxesList, 0, 1, grid, sender), 2);
textBoxDistance.Text = $"Distance between {cities.CheckBoxesList[0].Tag.ToString()} and {cities.CheckBoxesList[1].Tag.ToString()}: {distance} km ";
}
