/*
* distance calculation using big-circle formula
*/
public static double calDistance(IKmlFolder trip)
{
double distance = 0;
IKmlObjectList points = trip.getFeatures().getChildNodes();
IKmlPlacemark prev = null;
for (int i = 0; i != (points.getLength()); i++)
{
IKmlPlacemark curr = (IKmlPlacemark)points.item(i);
if (prev != null)
{
double d = DistanceAlgorithm.DistanceBetweenPlaces((double)getCoordinates(curr)["lat"], (double)getCoordinates(curr)["lon"]
, (double)getCoordinates(prev)["lat"], (double)getCoordinates(prev)["lon"]);
distance += d;
}
prev = curr;
}
return(Math.Round(distance, 3));
}
public void writeTextToFile(String filePath)
{
//Once the user has completed editing, we will write the text file
//Now the write will be a combination of the Viewer file which the user was editing and the total file which wasn't being edited.
//So we'll go through all the trips in the total database and if we're on the trip that we were editing we'll use the values from our Viewer.
String day;
int i = 0;
day = databaseViewerTotal.Rows[0]["Day"].ToString();
String[] dayStartCoordinates = new String[2];
String[] dayFinishCoordinates = new String[2];
dayStartCoordinates[0] = databaseViewerTotal.Rows[i]["sLongitude"].ToString();
dayStartCoordinates[1] = databaseViewerTotal.Rows[i]["sLatitude"].ToString();
while (i != databaseViewerTotal.Rows.Count)
{
if (databaseViewerTotal.Rows[i]["Day"].Equals(day))
{
if (databaseViewerTotal.Rows[i]["Day"].Equals(GlobalDay))
{
for (int j = 0; j != databaseViewer.Rows.Count; ++j)
{
//We will use data from the Viewer dataTable
DataRow row = writeToFile.NewRow();
row = copyDataRowContents(databaseViewer.Rows[j], row);
dayFinishCoordinates[0] = databaseViewer.Rows[j]["fLongitude"].ToString();
dayFinishCoordinates[1] = databaseViewer.Rows[j]["fLatitude"].ToString();
writeToFile.Rows.Add(row);
}
//Once all the data for this file is written we should fill out the other information
//But before that we need to find the next set of trip
while (databaseViewerTotal.Rows[i]["Day"].Equals(GlobalDay))
{
++i;
}
DataRow row1 = writeToFile.NewRow();
row1[1] = "The return distance back to the start is " + Math.Round(DistanceAlgorithm.DistanceBetweenPlaces(Convert.ToDouble(dayStartCoordinates[1]), Convert.ToDouble(dayStartCoordinates[0]), Convert.ToDouble(dayFinishCoordinates[1]), Convert.ToDouble(dayFinishCoordinates[0])), 2) + " km.";
writeToFile.Rows.Add(row1);
dayStartCoordinates[0] = databaseViewerTotal.Rows[i]["sLongitude"].ToString();
dayStartCoordinates[1] = databaseViewerTotal.Rows[i]["sLatitude"].ToString();
row1 = writeToFile.NewRow();
row1[1] = "The distance between the days is " + Math.Round(DistanceAlgorithm.DistanceBetweenPlaces(Convert.ToDouble(dayFinishCoordinates[1]), Convert.ToDouble(dayFinishCoordinates[0]), Convert.ToDouble(dayStartCoordinates[1]), Convert.ToDouble(dayStartCoordinates[0])), 2) + " km.";
writeToFile.Rows.Add(row1);
day = databaseViewerTotal.Rows[i]["Day"].ToString();
}
else
{
DataRow row = writeToFile.NewRow();
row = copyDataRowContents(databaseViewerTotal.Rows[i], row);
writeToFile.Rows.Add(row);
++i;
}
}
else
{
//If a new trip has started. Then we should first fill in some information
DataRow row = writeToFile.NewRow();
dayFinishCoordinates[0] = databaseViewerTotal.Rows[i - 1]["fLongitude"].ToString();
dayFinishCoordinates[1] = databaseViewerTotal.Rows[i - 1]["fLatitude"].ToString();
row[1] = "The return distance back to the start is " + Math.Round(DistanceAlgorithm.DistanceBetweenPlaces(Convert.ToDouble(dayStartCoordinates[1]), Convert.ToDouble(dayStartCoordinates[0]), Convert.ToDouble(dayFinishCoordinates[1]), Convert.ToDouble(dayFinishCoordinates[0])), 2) + " km.";
writeToFile.Rows.Add(row);
dayStartCoordinates[0] = databaseViewerTotal.Rows[i]["sLongitude"].ToString();
dayStartCoordinates[1] = databaseViewerTotal.Rows[i]["sLatitude"].ToString();
row = writeToFile.NewRow();
row[1] = "The distance between the days is " + Math.Round(DistanceAlgorithm.DistanceBetweenPlaces(Convert.ToDouble(dayFinishCoordinates[1]), Convert.ToDouble(dayFinishCoordinates[0]), Convert.ToDouble(dayStartCoordinates[1]), Convert.ToDouble(dayStartCoordinates[0])), 2) + " km.";
writeToFile.Rows.Add(row);
day = databaseViewerTotal.Rows[i]["Day"].ToString();
}
}
//Now once we've collected all the information in the datatable we'll write it out to a file
DateTime currentDateTime = DateTime.Now;
String tempDateTime = currentDateTime.ToString("yyMMdd_HHmmss");
String newFilePath = filePath.Split('.')[0] + "_" + tempDateTime + ".txt";
String newFileText = buildStringForWriting(writeToFile);
//First we'll copy the contents of the current file, into the new file
File.Move(filePath, newFilePath);
//Then we will copy the clear the contents of the current file
System.IO.StreamWriter file = new System.IO.StreamWriter(filePath);
file.WriteLine(newFileText);
file.Close();
MessageBox.Show("The text file has been written to " + filePath + "\nThe previous version was saved in " + newFilePath);
}