--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gwt-client/src/main/java/org/dive4elements/river/client/client/ui/SingleLocationPanel.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,128 @@
+package org.dive4elements.river.client.client.ui;
+
+import com.google.gwt.i18n.client.NumberFormat;
+
+import com.smartgwt.client.data.Record;
+
+import com.smartgwt.client.widgets.grid.events.CellClickEvent;
+
+import org.dive4elements.river.client.shared.model.Data;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * This UIProvider creates a widget to enter a single location (km).
+ */
+public class SingleLocationPanel
+extends      MultipleLocationPanel
+{
+    private static final long serialVersionUID = -300641333561787454L;
+
+
+    /**
+     * Creates a new SingleLocationPanel instance.
+     */
+    public SingleLocationPanel() {
+        picker = new LocationPicker(this);
+    }
+
+
+    /** Overridden to restrict to one entered value. */
+    @Override
+    public List<String> validate() {
+        List<String> errors = new ArrayList<String>();
+        NumberFormat nf     = NumberFormat.getDecimalFormat();
+
+        saveLocationValues(locationPanel);
+
+        if (!locationPanel.validateForm()) {
+            errors.add(MSG.wrongFormat());
+            return errors;
+        }
+
+        double[] values = getLocationValues();
+        double[] good   = new double[values.length];
+        int      idx    = 0;
+
+        // We want just one value to be allowed.
+        if (values.length > 1) {
+            errors.add(MSG.too_many_values());
+        }
+
+        for (double value: values) {
+            if (value < min || value > max) {
+                String tmp = MSG.error_validate_range();
+                tmp = tmp.replace("$1", nf.format(value));
+                tmp = tmp.replace("$2", nf.format(min));
+                tmp = tmp.replace("$3", nf.format(max));
+                errors.add(tmp);
+            }
+            else {
+                good[idx++] = value;
+            }
+        }
+
+        double[] justGood = new double[idx];
+        for (int i = 0; i < justGood.length; i++) {
+            justGood[i] = good[i];
+        }
+
+        if (!errors.isEmpty()) {
+            locationPanel.setValues(justGood);
+        }
+
+        return errors;
+    }
+
+
+    /**
+     * This method returns the selected data.
+     *
+     * @return the selected/inserted data.
+     */
+    @Override
+    public Data[] getData() {
+        saveLocationValues(locationPanel);
+        double[] values = getLocationValues();
+        Data[] data = new Data[values.length+1];
+
+        for (int i = 0; i < values.length; i++) {
+            data[i] = createDataArray(getDataItemName(),
+                Double.valueOf(values[i]).toString());
+        }
+
+        data[values.length] = createDataArray("ld_mode", "locations");
+
+        return data;
+    }
+
+
+    /* This is a copy of super.super.onRecordClick. Straighten out
+       this weird family. */
+    /**
+     * Callback when an item from the input helper was clicked.
+     * Set the respective km-value in the location value field.
+     * @param e event passed.
+     */
+    @Override
+    public void onCellClick (CellClickEvent e) {
+        Record record = e.getRecord();
+        double[] selected = new double[1];
+        try {
+            selected[0] =
+                Double.parseDouble(record.getAttribute("from"));
+        }
+        catch(NumberFormatException nfe) {
+            // Is there anything else to do here?
+        }
+        setLocationValues(selected);
+    }
+
+
+    @Override
+    protected String getLabelString() {
+        return MSG.single_location();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :