protected int graphValue(DatedEvent ev, int index)
{
// the Server Availability graph requires interpolated (stepped) line;
// others require peaks where the data actually is:
if(ev == null)
{ // no data at this point.
switch(m_graphMode)
{
case GRAPH_MODE_STEPPED:
ev = m_lastEvent; // may be null too
break;
}
}
int value;
if(ev == null || (index+1) > ev.nValues())
{
value = m_yZeroMark;
}
else
{
double evValue = ev.values(m_format)[index];
if(m_format == Project.FORMAT_EARTHQUAKES_STRONGEST && evValue == 0.0d)
{
evValue = 0.5d; // quakes with unknown magnitude will be small bumps on the graph
}
value = m_yZeroMark - (int)(evValue * m_valueFactor);
}
m_lastEvent = ev;
return value;
}
private void rebuildGraphTab(ArrayList selectedTracksRows)
{
Cursor.Current = Cursors.WaitCursor;
makeTrackpointsDS(selectedTracksRows);
double maxElev = -1000.0d; // feet
double maxSpeed = -1000.0d; // miles per hour
SortedList events = new SortedList();
DataTable table = m_trackpointsDS.Tables["trackpoints"];
foreach(DataRow row in table.Rows)
{
/*
* this is what the columns are:
myDataRow["id"];
myDataRow["trackid"];
myDataRow["wptidx"];
myDataRow["name"];
myDataRow["time"] = new SortableDateTime(wpt.DateTime);
myDataRow["location"] = wpt.Location.ToStringWithElev();
myDataRow["speed"] = new Speed();
myDataRow["heading"] = string;
myDataRow["leg"] = Distance;
myDataRow["track"] = string;
myDataRow["source"] = string;
myDataRow["displayed"] = string;
*/
DateTime time = ((SortableDateTime)row["time"]).DateTime;
long id = (long)((int)row["id"]);
double elev = 0.0d; // feet
try
{
elev = Math.Round((Double)row["elevation"] / Distance.METERS_PER_FOOT); // * factor;
}
catch {}
double speed = 0.0d; // miles per hour
try
{
speed = Math.Round(((Speed)row["speed"]).Meters / Distance.METERS_PER_MILE); // * factor;
}
catch {}
maxElev = Math.Max(elev, maxElev);
maxSpeed = Math.Max(speed, maxSpeed);
string url = "";
string properties = (url.Length == 0) ? "" : "w";
long[] ids = new long[2];
ids[0] = id;
ids[1] = id;
double[] values = new double[2];
values[0] = elev;
values[1] = speed;
string[] sValues = new string[2];
sValues[0] = properties;
sValues[1] = "";
DatedEvent ev = new DatedEvent(time, values, sValues, ids, 2);
while(true)
{
try
{
events.Add(time, ev);
break;
}
catch
{
time = time.AddTicks(1);
}
}
}
if(maxElev > 0.0d && maxSpeed > 0.0d)
{
// make speed graph match the elevation:
double speedFactor = 0.6d * maxElev / maxSpeed;
foreach(DatedEvent ev in events.Values)
{
double[] values = ev.values(Project.FORMAT_TRACK_ELEVATION);
values[1] = Math.Round(values[1] * speedFactor);
}
}
string selHint = "Click into grey area to see selected interval";
StringById dZoomById = new StringById(zoomById);
StringById dDescrById = new StringById(descrById);
double rounder = 200.0d;
if(this.m_elevMax > 10000.0d)
{
rounder = 2000.0d;
}
else if(this.m_elevMax > 1000.0d)
{
rounder = 1000.0d;
}
else if(this.m_elevMax <= 50.0d)
{
this.m_elevMax = 50.0d;
rounder = 100.0d;
}
double graphGridMaxValue = Math.Ceiling(this.m_elevMax / (Distance.METERS_PER_FOOT * rounder)) * rounder;
int steps = (int) (graphGridMaxValue / rounder);
graphByTimeControl.MaxValueY = graphGridMaxValue;
graphByTimeControl.MinTimeMargin = 1 * 60 * 1000; // ms - 1 min
graphByTimeControl.StepY = graphGridMaxValue / steps;
graphByTimeControl.MarginLeft = 45;
graphByTimeControl.MarginRight = 30;
graphByTimeControl.initialHint = "Click on graph to see details. Use arrow keys. Drag mouse to select time interval, click into it to zoom.";
graphByTimeControl.init(this, "", "", selHint, dDescrById, dZoomById, dBrowseById, new MethodInvoker(showSelected));
graphByTimeControl.setGraphData(events, Project.FORMAT_TRACK_ELEVATION, 2, false);
graphByTimeControl.resetLegends();
graphByTimeControl.setLegend(0, "elevation");
graphByTimeControl.setLegend(1, "speed");
m_selectedTracksRows = selectedTracksRows;
Cursor.Current = Cursors.Default;
}
