Index: trunk/src/org/openstreetmap/josm/gui/util/TableHelper.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/util/TableHelper.java	(revision 5785)
+++ trunk/src/org/openstreetmap/josm/gui/util/TableHelper.java	(revision 5785)
@@ -0,0 +1,27 @@
+package org.openstreetmap.josm.gui.util;
+
+import java.awt.Component;
+import javax.swing.JTable;
+import javax.swing.table.TableCellRenderer;
+
+/**
+ * The class that provide common JTable customization methods
+ */
+public class TableHelper {
+    /**
+    * (originally from @class org.openstreetmap.josm.gui.preferences.SourceEditor)
+    * adjust the preferred width of column col to the maximum preferred width of the cells
+    * requires JTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
+    */
+    public static void adjustColumnWidth(JTable tbl, int col, int maxColumnWidth) {
+        int maxwidth = 0;
+        for (int row=0; row<tbl.getRowCount(); row++) {
+            TableCellRenderer tcr = tbl.getCellRenderer(row, col);
+            Object val = tbl.getValueAt(row, col);
+            Component comp = tcr.getTableCellRendererComponent(tbl, val, false, false, row, col);
+            maxwidth = Math.max(comp.getPreferredSize().width, maxwidth);
+        }
+        tbl.getColumnModel().getColumn(col).setPreferredWidth(Math.min(maxwidth+10, maxColumnWidth));
+    }
+    
+}