Added sorting to table

app/src/processing/app/contrib/ContributionListPanel.java

@@ -27,6 +27,7 @@ import java.util.*;
 import java.util.Map.Entry;
 
 import javax.swing.*;
+import javax.swing.RowSorter.SortKey;
 import javax.swing.border.Border;
 import javax.swing.event.*;
 import javax.swing.table.*;
@@ -115,6 +116,7 @@ public class ContributionListPanel extends JPanel implements Scrollable, Contrib
     table.setColumnSelectionAllowed(false);
     table.setCellSelectionEnabled(false);
     table.setAutoCreateColumnsFromModel(true);
+    table.setAutoCreateRowSorter(false);
     table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
     table.getSelectionModel()
       .addListSelectionListener(new ListSelectionListener() {
@@ -131,7 +133,10 @@ public class ContributionListPanel extends JPanel implements Scrollable, Contrib
     TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(table.getModel());
     table.setRowSorter(sorter);
     sorter.setComparator(1, contribListing.getComparator());
-    
+    sorter.setSortable(0, false);
+    sorter.setSortable(2, false);
+    table.getTableHeader().setDefaultRenderer(new MyColumnHeaderRenderer());
+
     GroupLayout layout = new GroupLayout(this);
     layout.setHorizontalGroup(layout.createParallelGroup().addComponent(scrollPane));
     layout.setVerticalGroup(layout.createSequentialGroup().addComponent(scrollPane));
@@ -140,6 +145,98 @@ public class ContributionListPanel extends JPanel implements Scrollable, Contrib
     table.setVisible(true);
     
   }
+  
+  class MyColumnHeaderRenderer extends DefaultTableCellRenderer {
+    
+    /**
+     * Constructs a <code>DefaultTableHeaderCellRenderer</code>.
+     * <P>
+     * The horizontal alignment and text position are set as appropriate to a
+     * table header cell, and the opaque property is set to false.
+     */
+    public MyColumnHeaderRenderer() {
+//      setHorizontalAlignment(CENTER);
+      setHorizontalTextPosition(LEFT);
+//      setVerticalAlignment(BOTTOM);
+      setOpaque(true);
+    }
+    
+    /**
+     * Returns the default table header cell renderer.
+     * <P>
+     * If the column is sorted, the appropriate icon is retrieved from the
+     * current Look and Feel, and a border appropriate to a table header cell
+     * is applied.
+     * <P>
+     * Subclasses may override this method to provide custom content or
+     * formatting.
+     *
+     * @param table the <code>JTable</code>.
+     * @param value the value to assign to the header cell
+     * @param isSelected This parameter is ignored.
+     * @param hasFocus This parameter is ignored.
+     * @param row This parameter is ignored.
+     * @param column the column of the header cell to render
+     * @return the default table header cell renderer
+     */
+    @Override
+    public Component getTableCellRendererComponent(JTable table, Object value,
+            boolean isSelected, boolean hasFocus, int row, int column) {
+      super.getTableCellRendererComponent(table, value,
+              isSelected, hasFocus, row, column);
+      JTableHeader tableHeader = table.getTableHeader();
+      if (tableHeader != null) {
+        setForeground(tableHeader.getForeground());
+      }
+      setIcon(getIcon(table, column));
+      setBackground(Color.WHITE);
+      setBorder(BorderFactory.createCompoundBorder(BorderFactory
+        .createMatteBorder(2, 0, 2, 0, Color.BLACK), BorderFactory
+        .createEmptyBorder(0, (column == 2 ? 17 : 0), 0, 0)));
+      return this;
+    }
+
+    /**
+     * Overloaded to return an icon suitable to the primary sorted column, or null if
+     * the column is not the primary sort key.
+     *
+     * @param table the <code>JTable</code>.
+     * @param column the column index.
+     * @return the sort icon, or null if the column is unsorted.
+     */
+    protected Icon getIcon(JTable table, int column) {
+      SortKey sortKey = getSortKey(table, column);
+      if (sortKey != null && table.convertColumnIndexToView(sortKey.getColumn()) == column) {
+        switch (sortKey.getSortOrder()) {
+          case ASCENDING:
+            return UIManager.getIcon("Table.ascendingSortIcon");
+          case DESCENDING:
+            return UIManager.getIcon("Table.descendingSortIcon");
+        }
+      }
+      return null;
+    }
+
+    /**
+     * Returns the current sort key, or null if the column is unsorted.
+     *
+     * @param table the table
+     * @param column the column index
+     * @return the SortKey, or null if the column is unsorted
+     */
+    protected SortKey getSortKey(JTable table, int column) {
+      RowSorter rowSorter = table.getRowSorter();
+      if (rowSorter == null) {
+        return null;
+      }
+
+      List sortedColumns = rowSorter.getSortKeys();
+      if (sortedColumns.size() > 0) {
+        return (SortKey) sortedColumns.get(0);
+      }
+      return null;
+    }
+}
 
   class StatusRendere extends DefaultTableCellRenderer {