X-Git-Url: https://gitweb.fperrin.net/?a=blobdiff_plain;ds=sidebyside;f=tim%2Fprune%2Ffunction%2Fdistance%2FDistanceTableModel.java;fp=tim%2Fprune%2Ffunction%2Fdistance%2FDistanceTableModel.java;h=8adbf6915150a4f5e9875ef394def5d756596dce;hb=54b9d8bc8f0025ccf97a67d9dd217ef1f9cf082f;hp=0000000000000000000000000000000000000000;hpb=52bf9e8686c916be37a26a0b75340393d4478b05;p=GpsPrune.git

diff --git a/tim/prune/function/distance/DistanceTableModel.java b/tim/prune/function/distance/DistanceTableModel.java
new file mode 100644
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+++ b/tim/prune/function/distance/DistanceTableModel.java
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+package tim.prune.function.distance;
+
+import tim.prune.Config;
+import tim.prune.I18nManager;
+import tim.prune.data.DataPoint;
+import tim.prune.data.Distance;
+
+/**
+ * Class to hold the table model for the distances table
+ */
+public class DistanceTableModel extends GenericTableModel
+{
+	/** Distances */
+	private double[] _distances = null;
+	/** Metric distances? */
+	private boolean _useMetric = true;
+	/** Previous value of metric flag (to spot changes) */
+	private boolean _prevUseMetric = false;
+	/** Column heading */
+	private static final String _toColLabel = I18nManager.getText("dialog.distances.column.to");
+	/** Column heading (depends on metric/imperial settings) */
+	private String _distanceLabel = null;
+
+	/**
+	 * @return column count
+	 */
+	public int getColumnCount()
+	{
+		return 2;
+	}
+
+	/**
+	 * @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 (_distances == null) {return 0.0;}
+		return new Double(_distances[inRowIndex]);
+	}
+
+	/**
+	 * @param inColumnIndex column index
+	 * @return column name
+	 */
+	public String getColumnName(int inColumnIndex)
+	{
+		if (inColumnIndex == 0) {return _toColLabel;}
+		return _distanceLabel;
+	}
+
+	/**
+	 * Get the column class (required for sorting)
+	 * @param inColumnIndex column index
+	 * @return Class of specified column
+	 */
+	public Class<?> getColumnClass(int inColumnIndex)
+	{
+		if (inColumnIndex == 0) return String.class;
+		return Double.class;
+	}
+
+	/**
+	 * Recalculate the distances
+	 * @param inIndex index of selected 'from' point
+	 */
+	public void recalculate(int inIndex)
+	{
+		// Use metric or not?
+		_useMetric = Config.getUseMetricUnits();
+		_distanceLabel = getDistanceLabel(_useMetric);
+		// Initialize array of distances
+		int numRows = getRowCount();
+		if (_distances == null || _distances.length != numRows) {
+			_distances = new double[numRows];
+		}
+		DataPoint fromPoint = _pointList.get(inIndex);
+		for (int i=0; i<numRows; i++) {
+			if (i == inIndex) {
+				_distances[i] = 0.0;
+			}
+			else {
+				double rads = DataPoint.calculateRadiansBetween(fromPoint, _pointList.get(i));
+				_distances[i] = Distance.convertRadiansToDistance(rads, _useMetric?Distance.Units.KILOMETRES:Distance.Units.MILES);
+			}
+		}
+		// Let table know that it has to refresh data (and maybe refresh column headings too)
+		if (_useMetric == _prevUseMetric) {
+			fireTableDataChanged();
+		}
+		else {
+			fireTableStructureChanged();
+		}
+		_prevUseMetric = _useMetric;
+	}
+
+	/**
+	 * @param inMetric true to use metric distances
+	 * @return distance label for column heading
+	 */
+	private static String getDistanceLabel(boolean inMetric)
+	{
+		return I18nManager.getText("fieldname.distance") + " (" +
+			I18nManager.getText(inMetric?"units.kilometres.short" : "units.miles.short") + ")";
+	}
+}