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package tim.prune.function.distance;
import tim.prune.I18nManager;
import tim.prune.config.Config;
import tim.prune.data.Bearing;
import tim.prune.data.DataPoint;
import tim.prune.data.Distance;
import tim.prune.data.Unit;
import tim.prune.data.UnitSetLibrary;
/**
* Class to hold the table model for the distances table
*/
public class DistanceTableModel extends GenericTableModel
{
/** Distances */
private double[] _distances = null;
/** Bearings */
private String[] _bearings = null;
/** Column heading */
private static final String _toColLabel = I18nManager.getText("dialog.distances.column.to");
/** Column heading (depends on metric/imperial settings) */
private String _distanceLabel = null;
/** Column heading for bearing */
private final String _bearingLabel;
/** Previous distance units */
private Unit _previousDistUnit = null;
/** Object to convert bearing to description */
private BearingDescriber _bearingDescriber = new BearingDescriber();
public DistanceTableModel() {
_bearingLabel = I18nManager.getText("fieldname.bearing");
}
/**
* @return column count
*/
public int getColumnCount() {
return 3;
}
/**
* @param inRowIndex row index
* @param inColumnIndex column index
* @return cell value
*/
public Object getValueAt(int inRowIndex, int inColumnIndex)
{
if (inColumnIndex == 0) {
return getPointName(inRowIndex);
}
if (inColumnIndex == 1) {
return _distances == null ? 0.0 : _distances[inRowIndex];
}
return _bearings == null ? "" : _bearings[inRowIndex];
}
/**
* @param inColumnIndex column index
* @return column name
*/
public String getColumnName(int inColumnIndex)
{
if (inColumnIndex == 0) {
return _toColLabel;
}
if (inColumnIndex == 1) {
return _distanceLabel;
}
return _bearingLabel;
}
/**
* Get the column class (required for sorting)
* @param inColumnIndex column index
* @return Class of specified column
*/
public Class<?> getColumnClass(int inColumnIndex)
{
if (inColumnIndex == 0 || inColumnIndex == 2) {
return String.class;
}
return Double.class;
}
/**
* Recalculate the distances
* @param inIndex index of selected 'from' point
* @param inConfig config object, used to get units
*/
public void recalculate(int inIndex, Config inConfig)
{
// Which units to use?
final Unit distUnit = inConfig.getUnitSet().getDistanceUnit();
_distanceLabel = I18nManager.getText("fieldname.distance") + " (" +
I18nManager.getText(distUnit.getShortnameKey()) + ")";
final boolean distUnitsChanged = (distUnit != _previousDistUnit);
_previousDistUnit = distUnit;
// Initialize array of distances
int numRows = getRowCount();
if (_distances == null || _distances.length != numRows) {
_distances = new double[numRows];
}
if (_bearings == null || _bearings.length != numRows) {
_bearings = new String[numRows];
}
DataPoint fromPoint = _pointList.get(inIndex);
for (int i=0; i<numRows; i++)
{
if (i == inIndex)
{
_distances[i] = 0.0;
_bearings[i] = "";
}
else
{
final DataPoint toPoint = _pointList.get(i);
final double rads = DataPoint.calculateRadiansBetween(fromPoint, toPoint);
_distances[i] = Distance.convertRadiansToDistance(rads, distUnit);
if (Distance.convertRadiansToDistance(rads, UnitSetLibrary.UNITS_METRES) < 20.0) {
_bearings[i] = "";
}
else
{
final double bearing = Bearing.calculateDegrees(fromPoint, toPoint);
_bearings[i] = _bearingDescriber.describeBearing(bearing);
}
}
}
// Let table know that it has to refresh data, and maybe the whole table too
if (distUnitsChanged) {
fireTableStructureChanged();
}
else {
fireTableDataChanged();
}
}
}
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