JAL-2371 remove ColourSchemeI.findColour(c), pure interface groovy
[jalview.git] / src / jalview / gui / UserDefinedColours.java
index 85f35cd..a368e74 100755 (executable)
 /*
- * Jalview - A Sequence Alignment Editor and Viewer
- * Copyright (C) 2007 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
+ * 
+ * This file is part of Jalview.
+ * 
+ * Jalview is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License 
+ * as published by the Free Software Foundation, either version 3
  * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
+ *  
+ * Jalview is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty 
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
+ * PURPOSE.  See the GNU General Public License for more details.
+ * 
  * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ * along with Jalview.  If not, see <http://www.gnu.org/licenses/>.
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
  */
 package jalview.gui;
 
-import java.io.*;
-import java.util.*;
-
-import java.awt.*;
-import java.awt.event.*;
-import javax.swing.*;
-import javax.swing.event.*;
-
-import jalview.datamodel.*;
-import jalview.io.*;
-import jalview.jbgui.*;
-import jalview.schemes.*;
+import jalview.api.structures.JalviewStructureDisplayI;
+import jalview.bin.Cache;
+import jalview.datamodel.SequenceGroup;
+import jalview.io.JalviewFileChooser;
+import jalview.io.JalviewFileView;
+import jalview.jbgui.GUserDefinedColours;
+import jalview.schemabinding.version2.Colour;
+import jalview.schemabinding.version2.JalviewUserColours;
+import jalview.schemes.ColourSchemeI;
+import jalview.schemes.ColourSchemes;
+import jalview.schemes.ResidueProperties;
+import jalview.schemes.UserColourScheme;
+import jalview.util.ColorUtils;
+import jalview.util.Format;
+import jalview.util.MessageManager;
+
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.Insets;
+import java.awt.event.ActionEvent;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.OutputStreamWriter;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.swing.JButton;
+import javax.swing.JInternalFrame;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
 
 /**
- * DOCUMENT ME!
- *
- * @author $author$
- * @version $Revision$
+ * This panel allows the user to assign colours to Amino Acid residue codes, and
+ * save the colour scheme.
+ * 
+ * @author Andrew Waterhouse
+ * @author Mungo Carstairs
  */
-public class UserDefinedColours
-    extends GUserDefinedColours implements ChangeListener
+public class UserDefinedColours extends GUserDefinedColours implements
+        ChangeListener
 {
+  private static final Font VERDANA_BOLD_10 = new Font("Verdana", Font.BOLD, 10);
+
+  public static final String USER_DEFINED_COLOURS = "USER_DEFINED_COLOURS";
+
+  private static final String LAST_DIRECTORY = "LAST_DIRECTORY";
+
+  private static final int MY_FRAME_HEIGHT = 420;
+
+  private static final int MY_FRAME_WIDTH = 810;
+
+  private static final int MY_FRAME_WIDTH_CASE_SENSITIVE = 970;
+
   AlignmentPanel ap;
+
   SequenceGroup seqGroup;
-  Vector selectedButtons;
+
+  List<JButton> selectedButtons;
+
   ColourSchemeI oldColourScheme;
+
   JInternalFrame frame;
-  AppJmol jmol;
-  Vector upperCaseButtons;
-  Vector lowerCaseButtons;
+
+  JalviewStructureDisplayI structureViewer;
+
+  List<JButton> upperCaseButtons;
+
+  List<JButton> lowerCaseButtons;
 
   /**
    * Creates a new UserDefinedColours object.
-   *
-   * @param ap DOCUMENT ME!
-   * @param sg DOCUMENT ME!
+   * 
+   * @param ap
+   * @param sg
    */
   public UserDefinedColours(AlignmentPanel ap, SequenceGroup sg)
   {
@@ -66,7 +109,7 @@ public class UserDefinedColours
 
     if (seqGroup != null)
     {
-      oldColourScheme = seqGroup.cs;
+      oldColourScheme = seqGroup.getColourScheme();
     }
     else
     {
@@ -75,8 +118,8 @@ public class UserDefinedColours
 
     if (oldColourScheme instanceof UserColourScheme)
     {
-      schemeName.setText( ( (UserColourScheme) oldColourScheme).getName());
-      if ( ( (UserColourScheme) oldColourScheme).getLowerCaseColours() != null)
+      schemeName.setText(oldColourScheme.getSchemeName());
+      if (((UserColourScheme) oldColourScheme).getLowerCaseColours() != null)
       {
         caseSensitive.setSelected(true);
         lcaseColour.setEnabled(true);
@@ -95,10 +138,11 @@ public class UserDefinedColours
     showFrame();
   }
 
-  public UserDefinedColours(AppJmol jmol, ColourSchemeI oldcs)
+  public UserDefinedColours(JalviewStructureDisplayI viewer,
+          ColourSchemeI oldcs)
   {
     super();
-    this.jmol = jmol;
+    this.structureViewer = viewer;
 
     colorChooser.getSelectionModel().addChangeListener(this);
 
@@ -106,7 +150,7 @@ public class UserDefinedColours
 
     if (oldColourScheme instanceof UserColourScheme)
     {
-      schemeName.setText( ( (UserColourScheme) oldColourScheme).getName());
+      schemeName.setText(((UserColourScheme) oldColourScheme).getSchemeName());
     }
 
     resetButtonPanel(false);
@@ -120,46 +164,40 @@ public class UserDefinedColours
     colorChooser.getSelectionModel().addChangeListener(this);
     frame = new JInternalFrame();
     frame.setContentPane(this);
-    Desktop.addInternalFrame(frame, "User Defined Colours", 720, 370, true);
+    Desktop.addInternalFrame(frame,
+            MessageManager.getString("label.user_defined_colours"),
+            MY_FRAME_WIDTH, MY_FRAME_HEIGHT, true);
 
     if (seqGroup != null)
     {
       frame.setTitle(frame.getTitle() + " (" + seqGroup.getName() + ")");
     }
-
-    if (new jalview.util.Platform().isAMac())
-    {
-      frame.setSize(760, 370);
-    }
   }
 
-  void resetButtonPanel(boolean caseSensitive)
+  /**
+   * Rebuilds the panel with coloured buttons for residues. If not case
+   * sensitive colours, show 3-letter amino acid code as button text. If case
+   * sensitive, just show the single letter code, in order to make space for the
+   * additional buttons.
+   * 
+   * @param isCaseSensitive
+   */
+  void resetButtonPanel(boolean isCaseSensitive)
   {
     buttonPanel.removeAll();
 
     if (upperCaseButtons == null)
     {
-      upperCaseButtons = new Vector();
+      upperCaseButtons = new ArrayList<JButton>();
     }
 
-    JButton button;
-    String label;
     for (int i = 0; i < 20; i++)
     {
-      if (caseSensitive)
-      {
-        label = ResidueProperties.aa[i];
-      }
-      else
-      {
-        label = ResidueProperties.aa2Triplet.get
-            (ResidueProperties.aa[i]).toString();
-      }
-
-      button = makeButton(label,
-                          ResidueProperties.aa[i],
-                          upperCaseButtons, i);
-
+      String label = isCaseSensitive ? ResidueProperties.aa[i]
+              : ResidueProperties.aa2Triplet.get(ResidueProperties.aa[i])
+                      .toString();
+      JButton button = makeButton(label, ResidueProperties.aa[i],
+              upperCaseButtons, i);
       buttonPanel.add(button);
     }
 
@@ -168,7 +206,7 @@ public class UserDefinedColours
     buttonPanel.add(makeButton("X", "X", upperCaseButtons, 22));
     buttonPanel.add(makeButton("Gap", "-", upperCaseButtons, 23));
 
-    if (!caseSensitive)
+    if (!isCaseSensitive)
     {
       gridLayout.setRows(6);
       gridLayout.setColumns(4);
@@ -181,74 +219,95 @@ public class UserDefinedColours
 
       if (lowerCaseButtons == null)
       {
-        lowerCaseButtons = new Vector();
+        lowerCaseButtons = new ArrayList<JButton>();
       }
 
       for (int i = 0; i < 20; i++)
       {
         int row = i / cols + 1;
         int index = (row * cols) + i;
-        button = makeButton(
-            ResidueProperties.aa[i].toLowerCase(),
-            ResidueProperties.aa[i].toLowerCase(),
-            lowerCaseButtons,
-            i);
+        JButton button = makeButton(ResidueProperties.aa[i].toLowerCase(),
+                ResidueProperties.aa[i].toLowerCase(), lowerCaseButtons, i);
 
         buttonPanel.add(button, index);
       }
     }
 
-    if (caseSensitive)
+    if (isCaseSensitive)
     {
       buttonPanel.add(makeButton("b", "b", lowerCaseButtons, 20));
       buttonPanel.add(makeButton("z", "z", lowerCaseButtons, 21));
       buttonPanel.add(makeButton("x", "x", lowerCaseButtons, 22));
     }
 
+    // JAL-1360 widen the frame dynamically to accommodate case-sensitive AA
+    // codes
+    if (this.frame != null)
+    {
+      int newWidth = isCaseSensitive ? MY_FRAME_WIDTH_CASE_SENSITIVE
+              : MY_FRAME_WIDTH;
+      this.frame.setSize(newWidth, this.frame.getHeight());
+    }
+
     buttonPanel.validate();
     validate();
   }
 
   /**
    * DOCUMENT ME!
-   *
-   * @param evt DOCUMENT ME!
+   * 
+   * @param evt
+   *          DOCUMENT ME!
    */
+  @Override
   public void stateChanged(ChangeEvent evt)
   {
     if (selectedButtons != null)
     {
       JButton button = null;
+      final Color newColour = colorChooser.getColor();
       for (int i = 0; i < selectedButtons.size(); i++)
       {
-        button = (JButton) selectedButtons.elementAt(i);
-        button.setBackground(colorChooser.getColor());
-        button.setForeground(button.getBackground().brighter().brighter().
-                             brighter());
+        button = selectedButtons.get(i);
+        button.setBackground(newColour);
+        button.setForeground(ColorUtils.brighterThan(newColour));
       }
       if (button == lcaseColour)
       {
         for (int i = 0; i < lowerCaseButtons.size(); i++)
         {
-          button = (JButton) lowerCaseButtons.elementAt(i);
-          button.setBackground(colorChooser.getColor());
-          button.setForeground(button.getBackground().brighter().brighter().
-                               brighter());
+          button = lowerCaseButtons.get(i);
+          button.setBackground(newColour);
+          button.setForeground(ColorUtils.brighterThan(button
+                  .getBackground()));
         }
       }
     }
   }
 
   /**
-   * DOCUMENT ME!
-   *
-   * @param e DOCUMENT ME!
+   * Performs actions when a residue button is clicked. This manages the button
+   * selection set (highlighted by brighter foreground text).
+   * <p>
+   * On select button(s) with Ctrl/click or Shift/click: set button foreground
+   * text to brighter than background.
+   * <p>
+   * On unselect button(s) with Ctrl/click on selected, or click to release
+   * current selection: reset foreground text to darker than background.
+   * <p>
+   * Simple click: clear selection (resetting foreground to darker); set clicked
+   * button foreground to brighter
+   * <p>
+   * Finally, synchronize the colour chooser to the colour of the first button
+   * in the selected set.
+   * 
+   * @param e
    */
   public void colourButtonPressed(MouseEvent e)
   {
     if (selectedButtons == null)
     {
-      selectedButtons = new Vector();
+      selectedButtons = new ArrayList<JButton>();
     }
 
     JButton pressed = (JButton) e.getSource();
@@ -258,7 +317,7 @@ public class UserDefinedColours
       JButton start, end = (JButton) e.getSource();
       if (selectedButtons.size() > 0)
       {
-        start = (JButton) selectedButtons.elementAt(selectedButtons.size() - 1);
+        start = selectedButtons.get(selectedButtons.size() - 1);
       }
       else
       {
@@ -290,7 +349,8 @@ public class UserDefinedColours
         JButton button = (JButton) buttonPanel.getComponent(b);
         if (!selectedButtons.contains(button))
         {
-          button.setForeground(button.getBackground().brighter().brighter());
+          button.setForeground(ColorUtils.brighterThan(button
+                  .getBackground()));
           selectedButtons.add(button);
         }
       }
@@ -299,134 +359,179 @@ public class UserDefinedColours
     {
       for (int b = 0; b < selectedButtons.size(); b++)
       {
-        JButton button = (JButton) selectedButtons.elementAt(b);
-        button.setForeground(button.getBackground().darker().darker());
+        JButton button = selectedButtons.get(b);
+        button.setForeground(ColorUtils.darkerThan(button.getBackground()));
       }
       selectedButtons.clear();
-      pressed.setForeground(pressed.getBackground().brighter().brighter());
-      selectedButtons.addElement(pressed);
+      pressed.setForeground(ColorUtils.brighterThan(pressed.getBackground()));
+      selectedButtons.add(pressed);
 
     }
     else if (e.isControlDown())
     {
       if (selectedButtons.contains(pressed))
       {
-        pressed.setForeground(pressed.getBackground().darker().darker());
+        pressed.setForeground(ColorUtils.darkerThan(pressed.getBackground()));
         selectedButtons.remove(pressed);
       }
       else
       {
-        pressed.setForeground(pressed.getBackground().brighter().brighter());
-        selectedButtons.addElement(pressed);
+        pressed.setForeground(ColorUtils.brighterThan(pressed
+                .getBackground()));
+        selectedButtons.add(pressed);
       }
     }
 
     if (selectedButtons.size() > 0)
     {
-      colorChooser.setColor( ( (JButton) selectedButtons.elementAt(0)).
-                            getBackground());
+      colorChooser.setColor((selectedButtons.get(0)).getBackground());
     }
   }
 
   /**
-   * DOCUMENT ME!
-   *
-   * @param label DOCUMENT ME!
-   * @param aa DOCUMENT ME!
+   * A helper method to update or make a colour button, whose background colour
+   * is the associated colour, and text colour a darker shade of the same. If
+   * the button is already in the list, then its text and margins are updated,
+   * if not then it is created and added. This method supports toggling between
+   * case-sensitive and case-insensitive button panels. The case-sensitive
+   * version has abbreviated button text in order to fit in more buttons.
+   * 
+   * @param label
+   * @param residue
+   * @param the
+   *          list of buttons
+   * @param buttonIndex
+   *          the button's position in the list
    */
-  JButton makeButton(String label,
-                     String aa,
-                     Vector caseSensitiveButtons,
-                     int buttonIndex)
+  JButton makeButton(String label, String residue,
+          List<JButton> buttons, int buttonIndex)
   {
     final JButton button;
     Color col;
 
-    if (buttonIndex < caseSensitiveButtons.size())
+    if (buttonIndex < buttons.size())
     {
-      button = (JButton) caseSensitiveButtons.elementAt(buttonIndex);
+      button = buttons.get(buttonIndex);
       col = button.getBackground();
     }
     else
     {
       button = new JButton();
-      button.addMouseListener(new java.awt.event.MouseAdapter()
+      button.addMouseListener(new MouseAdapter()
       {
+        @Override
         public void mouseClicked(MouseEvent e)
         {
           colourButtonPressed(e);
         }
       });
 
-      caseSensitiveButtons.addElement(button);
+      buttons.add(button);
 
+      /*
+       * make initial button colour that of the current colour scheme,
+       * if it is a simple per-residue colouring, else white
+       */
       col = Color.white;
-
-      try
+      if (oldColourScheme != null && oldColourScheme.isSimple())
       {
-        col = oldColourScheme.findColour(aa.charAt(0), -1);
+        col = oldColourScheme.findColour(residue.charAt(0), 0, null, null,
+                0f);
       }
-      catch (Exception ex)
-      {}
     }
 
     if (caseSensitive.isSelected())
     {
-      button.setMargin(new java.awt.Insets(2, 2, 2, 2));
+      button.setMargin(new Insets(2, 2, 2, 2));
     }
     else
     {
-      button.setMargin(new java.awt.Insets(2, 14, 2, 14));
+      button.setMargin(new Insets(2, 14, 2, 14));
     }
 
+    button.setOpaque(true); // required for the next line to have effect
     button.setBackground(col);
     button.setText(label);
-    button.setForeground(col.darker().darker().darker());
-    button.setFont(new java.awt.Font("Verdana", Font.BOLD, 10));
+    button.setForeground(ColorUtils.darkerThan(col));
+    button.setFont(VERDANA_BOLD_10);
 
     return button;
   }
 
   /**
-   * DOCUMENT ME!
-   *
-   * @param e DOCUMENT ME!
+   * On 'OK', check that at least one colour has been assigned to a residue (and
+   * if not issue a warning), and apply the chosen colour scheme and close the
+   * panel.
    */
-  protected void okButton_actionPerformed(ActionEvent e)
+  @Override
+  protected void okButton_actionPerformed()
   {
-    applyButton_actionPerformed(null);
-
-    try
+    if (isNoSelectionMade())
     {
-      frame.setClosed(true);
+      JvOptionPane.showMessageDialog(Desktop.desktop, MessageManager
+              .getString("label.no_colour_selection_in_scheme"),
+              MessageManager.getString("label.no_colour_selection_warn"),
+              JvOptionPane.WARNING_MESSAGE);
     }
-    catch (Exception ex)
+    else
     {
+      applyButton_actionPerformed();
+
+      try
+      {
+        frame.setClosed(true);
+      } catch (Exception ex)
+      {
+      }
     }
   }
 
   /**
-   * DOCUMENT ME!
-   *
-   * @param e DOCUMENT ME!
+   * Returns true if the user has not made any colour selection (including if
+   * 'case-sensitive' selected and no lower-case colour chosen).
+   * 
+   * @return
    */
-  protected void applyButton_actionPerformed(ActionEvent e)
+  protected boolean isNoSelectionMade()
   {
+    final boolean noUpperCaseSelected = upperCaseButtons == null
+            || upperCaseButtons.isEmpty();
+    final boolean noLowerCaseSelected = caseSensitive.isSelected()
+            && (lowerCaseButtons == null || lowerCaseButtons.isEmpty());
+    final boolean noSelectionMade = noUpperCaseSelected
+            || noLowerCaseSelected;
+    return noSelectionMade;
+  }
+
+  /**
+   * Applies the current colour scheme to the alignment, sequence group or
+   * structure view.
+   */
+  @Override
+  protected void applyButton_actionPerformed()
+  {
+    if (isNoSelectionMade())
+    {
+      JvOptionPane.showMessageDialog(Desktop.desktop, MessageManager
+              .getString("label.no_colour_selection_in_scheme"),
+              MessageManager.getString("label.no_colour_selection_warn"),
+              JvOptionPane.WARNING_MESSAGE);
+
+    }
     UserColourScheme ucs = getSchemeFromButtons();
-    ucs.setName(schemeName.getText());
 
     if (seqGroup != null)
     {
-      seqGroup.cs = ucs;
+      seqGroup.setColourScheme(ucs);
       ap.paintAlignment(true);
     }
     else if (ap != null)
     {
       ap.alignFrame.changeColour(ucs);
     }
-    else if (jmol != null)
+    else if (structureViewer != null)
     {
-      jmol.setJalviewColourScheme(ucs);
+      structureViewer.setJalviewColourScheme(ucs);
     }
   }
 
@@ -435,129 +540,142 @@ public class UserDefinedColours
 
     Color[] newColours = new Color[24];
 
-    for (int i = 0; i < 24; i++)
+    int length = upperCaseButtons.size();
+    if (length < 24)
     {
-      JButton button = (JButton) upperCaseButtons.elementAt(i);
-      newColours[i] = button.getBackground();
+      int i = 0;
+      for (JButton btn : upperCaseButtons)
+      {
+        newColours[i] = btn.getBackground();
+        i++;
+      }
+    }
+    else
+    {
+      for (int i = 0; i < 24; i++)
+      {
+        JButton button = upperCaseButtons.get(i);
+        newColours[i] = button.getBackground();
+      }
     }
 
     UserColourScheme ucs = new UserColourScheme(newColours);
+    ucs.setName(schemeName.getText());
 
     if (caseSensitive.isSelected())
     {
       newColours = new Color[23];
-      for (int i = 0; i < 23; i++)
+      length = lowerCaseButtons.size();
+      if (length < 23)
       {
-        JButton button = (JButton) lowerCaseButtons.elementAt(i);
-        newColours[i] = button.getBackground();
+        int i = 0;
+        for (JButton btn : lowerCaseButtons)
+        {
+          newColours[i] = btn.getBackground();
+          i++;
+        }
+      }
+      else
+      {
+        for (int i = 0; i < 23; i++)
+        {
+          JButton button = lowerCaseButtons.get(i);
+          newColours[i] = button.getBackground();
+        }
       }
       ucs.setLowerCaseColours(newColours);
     }
 
-    if (ap != null)
-    {
-      ucs.setThreshold(0, ap.av.getIgnoreGapsConsensus());
-    }
+    // if (ap != null)
+    // {
+    // ucs.setThreshold(0, ap.av.isIgnoreGapsConsensus());
+    // }
 
     return ucs;
   }
 
   /**
    * DOCUMENT ME!
-   *
-   * @param e DOCUMENT ME!
+   * 
+   * @param e
+   *          DOCUMENT ME!
    */
+  @Override
   protected void loadbutton_actionPerformed(ActionEvent e)
   {
-    upperCaseButtons = new Vector();
-    lowerCaseButtons = new Vector();
-
-    JalviewFileChooser chooser = new JalviewFileChooser(jalview.bin.Cache.
-        getProperty(
-            "LAST_DIRECTORY"), new String[]
-        {"jc"},
-        new String[]
-        {"Jalview User Colours"}, "Jalview User Colours");
-    chooser.setFileView(new jalview.io.JalviewFileView());
-    chooser.setDialogTitle("Load colour scheme");
-    chooser.setToolTipText("Load");
+    upperCaseButtons = new ArrayList<JButton>();
+    lowerCaseButtons = new ArrayList<JButton>();
+
+    JalviewFileChooser chooser = new JalviewFileChooser(
+            Cache.getProperty(LAST_DIRECTORY), "jc", "Jalview User Colours");
+    chooser.setFileView(new JalviewFileView());
+    chooser.setDialogTitle(MessageManager
+            .getString("label.load_colour_scheme"));
+    chooser.setToolTipText(MessageManager.getString("action.load"));
 
     int value = chooser.showOpenDialog(this);
 
-    if (value == JalviewFileChooser.APPROVE_OPTION)
+    if (value != JalviewFileChooser.APPROVE_OPTION)
     {
-      File choice = chooser.getSelectedFile();
-      jalview.bin.Cache.setProperty("LAST_DIRECTORY", choice.getParent());
-      String defaultColours = jalview.bin.Cache.getDefault(
-          "USER_DEFINED_COLOURS",
-          choice.getPath());
-      if (defaultColours.indexOf(choice.getPath()) == -1)
-      {
-        defaultColours = defaultColours.concat("|").concat(choice.getPath());
-      }
-
-      jalview.bin.Cache.setProperty("USER_DEFINED_COLOURS", defaultColours);
-
-      UserColourScheme ucs = loadColours(choice.getAbsolutePath());
-      Color[] colors = ucs.getColours();
-      schemeName.setText(ucs.getName());
-
-      if (ucs.getLowerCaseColours() != null)
-      {
-        caseSensitive.setSelected(true);
-        lcaseColour.setEnabled(true);
-        resetButtonPanel(true);
-        for (int i = 0; i < lowerCaseButtons.size(); i++)
-        {
-          JButton button = (JButton) lowerCaseButtons.elementAt(i);
-          button.setBackground(ucs.getLowerCaseColours()[i]);
-        }
+      return;
+    }
+    File choice = chooser.getSelectedFile();
+    Cache.setProperty(LAST_DIRECTORY, choice.getParent());
 
-      }
-      else
-      {
-        caseSensitive.setSelected(false);
-        lcaseColour.setEnabled(false);
-        resetButtonPanel(false);
-      }
+    UserColourScheme ucs = ColourSchemes.loadColourScheme(choice.getAbsolutePath());
+    Color[] colors = ucs.getColours();
+    schemeName.setText(ucs.getSchemeName());
 
-      for (int i = 0; i < upperCaseButtons.size(); i++)
+    if (ucs.getLowerCaseColours() != null)
+    {
+      caseSensitive.setSelected(true);
+      lcaseColour.setEnabled(true);
+      resetButtonPanel(true);
+      for (int i = 0; i < lowerCaseButtons.size(); i++)
       {
-        JButton button = (JButton) upperCaseButtons.elementAt(i);
-        button.setBackground(colors[i]);
+        JButton button = lowerCaseButtons.get(i);
+        button.setBackground(ucs.getLowerCaseColours()[i]);
       }
+    }
+    else
+    {
+      caseSensitive.setSelected(false);
+      lcaseColour.setEnabled(false);
+      resetButtonPanel(false);
+    }
 
+    for (int i = 0; i < upperCaseButtons.size(); i++)
+    {
+      JButton button = upperCaseButtons.get(i);
+      button.setBackground(colors[i]);
     }
+
+    addNewColourScheme(choice.getPath());
   }
 
   /**
-   * DOCUMENT ME!
-   *
-   * @return DOCUMENT ME!
+   * Loads the user-defined colour scheme from the first file listed in property
+   * "USER_DEFINED_COLOURS". If this fails, returns an all-white colour scheme.
+   * 
+   * @return
    */
   public static UserColourScheme loadDefaultColours()
   {
     UserColourScheme ret = null;
 
-    String colours = jalview.bin.Cache.getProperty("USER_DEFINED_COLOURS");
+    String colours = Cache.getProperty(USER_DEFINED_COLOURS);
     if (colours != null)
     {
       if (colours.indexOf("|") > -1)
       {
         colours = colours.substring(0, colours.indexOf("|"));
       }
-
-      ret = loadColours(colours);
+      ret = ColourSchemes.loadColourScheme(colours);
     }
 
     if (ret == null)
     {
-      Color[] newColours = new Color[24];
-      for (int i = 0; i < 24; i++)
-      {
-        newColours[i] = Color.white;
-      }
-      ret = new UserColourScheme(newColours);
+      ret = new UserColourScheme("white");
     }
 
     return ret;
@@ -565,358 +683,179 @@ public class UserDefinedColours
 
   /**
    * DOCUMENT ME!
-   *
-   * @param file DOCUMENT ME!
-   *
-   * @return DOCUMENT ME!
-   */
-  static UserColourScheme loadColours(String file)
-  {
-    UserColourScheme ucs = null;
-    Color[] newColours = null;
-    try
-    {
-      InputStreamReader in = new InputStreamReader(new FileInputStream(
-          file), "UTF-8");
-
-      jalview.schemabinding.version2.JalviewUserColours jucs
-          = new jalview.schemabinding.version2.JalviewUserColours();
-
-      org.exolab.castor.xml.Unmarshaller unmar
-          = new org.exolab.castor.xml.Unmarshaller(jucs);
-      jucs = (jalview.schemabinding.version2.JalviewUserColours) unmar.
-          unmarshal(in);
-
-      newColours = new Color[24];
-
-      Color[] lowerCase = null;
-      boolean caseSensitive = false;
-
-      String name;
-      int index;
-      for (int i = 0; i < jucs.getColourCount(); i++)
-      {
-        name = jucs.getColour(i).getName();
-        if (ResidueProperties.aa3Hash.containsKey(name))
-        {
-          index = ( (Integer) ResidueProperties.aa3Hash.get(name)).intValue();
-        }
-        else
-        {
-          index = ResidueProperties.aaIndex[name.charAt(0)];
-        }
-        if (index == -1)
-        {
-          continue;
-        }
-
-        if (name.toLowerCase().equals(name))
-        {
-          if (lowerCase == null)
-          {
-            lowerCase = new Color[23];
-          }
-          caseSensitive = true;
-          lowerCase[index] = new Color(Integer.parseInt(
-              jucs.getColour(i).getRGB(), 16));
-        }
-        else
-        {
-          newColours[index] = new Color(Integer.parseInt(
-              jucs.getColour(i).getRGB(), 16));
-        }
-      }
-
-      if (newColours != null)
-      {
-        ucs = new UserColourScheme(newColours);
-        ucs.setName(jucs.getSchemeName());
-        if (caseSensitive)
-        {
-          ucs.setLowerCaseColours(lowerCase);
-        }
-      }
-
-    }
-    catch (Exception ex)
-    {
-      //Could be Archive Jalview format
-      try
-      {
-        InputStreamReader in = new InputStreamReader(new FileInputStream(
-            file), "UTF-8");
-
-        jalview.binding.JalviewUserColours jucs
-            = new jalview.binding.JalviewUserColours();
-
-        jucs = (jalview.binding.JalviewUserColours) jucs.unmarshal(in);
-
-        newColours = new Color[jucs.getColourCount()];
-
-        for (int i = 0; i < 24; i++)
-        {
-          newColours[i] = new Color(Integer.parseInt(
-              jucs.getColour(i).getRGB(), 16));
-        }
-        if (newColours != null)
-        {
-          ucs = new UserColourScheme(newColours);
-          ucs.setName(jucs.getSchemeName());
-        }
-      }
-      catch (Exception ex2)
-      {
-        ex2.printStackTrace();
-      }
-
-      if (newColours == null)
-      {
-        System.out.println("Error loading User ColourFile\n" + ex);
-      }
-    }
-
-    return ucs;
-  }
-
-  /**
-   * DOCUMENT ME!
-   *
-   * @param e DOCUMENT ME!
+   * 
+   * @param e
+   *          DOCUMENT ME!
    */
+  @Override
   protected void savebutton_actionPerformed(ActionEvent e)
   {
-    if (schemeName.getText().trim().length() < 1)
+    String name = schemeName.getText().trim();
+    if (name.length() < 1)
     {
-      JOptionPane.showInternalMessageDialog(Desktop.desktop,
-                                            "User colour scheme must have a name!",
-                                            "No name for colour scheme",
-                                            JOptionPane.WARNING_MESSAGE);
+      JvOptionPane.showInternalMessageDialog(Desktop.desktop, MessageManager
+              .getString("label.user_colour_scheme_must_have_name"),
+              MessageManager.getString("label.no_name_colour_scheme"),
+              JvOptionPane.WARNING_MESSAGE);
       return;
     }
 
-    if (userColourSchemes != null &&
-        userColourSchemes.containsKey(schemeName.getText()))
+    if (ColourSchemes.getInstance().nameExists(name))
     {
-      int reply = JOptionPane.showInternalConfirmDialog(Desktop.desktop,
-          "Colour scheme " + schemeName.getText() + " exists."
-          + "\nContinue saving colour scheme as " + schemeName.getText() + "?",
-          "Duplicate scheme name", JOptionPane.YES_NO_OPTION);
-      if (reply != JOptionPane.YES_OPTION)
+      int reply = JvOptionPane.showInternalConfirmDialog(Desktop.desktop,
+              MessageManager.formatMessage(
+                      "label.colour_scheme_exists_overwrite", new Object[] {
+                          name, name }),
+              MessageManager.getString("label.duplicate_scheme_name"),
+              JvOptionPane.YES_NO_OPTION);
+      if (reply != JvOptionPane.YES_OPTION)
       {
         return;
       }
-
-      userColourSchemes.remove(schemeName.getText());
+      ColourSchemes.getInstance().removeColourScheme(name);
     }
-    JalviewFileChooser chooser = new JalviewFileChooser(jalview.bin.Cache.
-        getProperty(
-            "LAST_DIRECTORY"), new String[]
-        {"jc"},
-        new String[]
-        {"Jalview User Colours"}, "Jalview User Colours");
+    JalviewFileChooser chooser = new JalviewFileChooser(
+            Cache.getProperty(LAST_DIRECTORY), "jc",
+            "Jalview User Colours");
 
-    chooser.setFileView(new jalview.io.JalviewFileView());
-    chooser.setDialogTitle("Save colour scheme");
-    chooser.setToolTipText("Save");
+    JalviewFileView fileView = new JalviewFileView();
+    chooser.setFileView(fileView);
+    chooser.setDialogTitle(MessageManager
+            .getString("label.save_colour_scheme"));
+    chooser.setToolTipText(MessageManager.getString("action.save"));
 
     int value = chooser.showSaveDialog(this);
 
     if (value == JalviewFileChooser.APPROVE_OPTION)
     {
-      String choice = chooser.getSelectedFile().getPath();
-      String defaultColours = jalview.bin.Cache.getDefault(
-          "USER_DEFINED_COLOURS", choice);
-      if (defaultColours.indexOf(choice) == -1)
-      {
-        if (defaultColours.length() > 0)
-        {
-          defaultColours = defaultColours.concat("|");
-        }
-        defaultColours = defaultColours.concat(choice);
-      }
-
-      userColourSchemes.put(schemeName.getText(), getSchemeFromButtons());
-
-      ap.alignFrame.updateUserColourMenu();
-
-      jalview.bin.Cache.setProperty("USER_DEFINED_COLOURS", defaultColours);
-
-      jalview.schemabinding.version2.JalviewUserColours ucs
-          = new jalview.schemabinding.version2.JalviewUserColours();
-
-      ucs.setSchemeName(schemeName.getText());
-      try
-      {
-        PrintWriter out = new PrintWriter(new OutputStreamWriter(
-            new FileOutputStream(choice), "UTF-8"));
-
-        for (int i = 0; i < buttonPanel.getComponentCount(); i++)
-        {
-          JButton button = (JButton) buttonPanel.getComponent(i);
-          jalview.schemabinding.version2.Colour col
-              = new jalview.schemabinding.version2.Colour();
-          col.setName(button.getText());
-          col.setRGB(jalview.util.Format.getHexString(
-              button.getBackground()));
-          ucs.addColour(col);
-        }
-
-        ucs.marshal(out);
-        out.close();
-      }
-      catch (Exception ex)
-      {
-        ex.printStackTrace();
-      }
+      File file = chooser.getSelectedFile();
+      addNewColourScheme(file.getPath());
+      saveToFile(file);
     }
   }
 
   /**
-   * DOCUMENT ME!
-   *
-   * @param e DOCUMENT ME!
+   * Adds the current colour scheme to the Jalview properties file so it is
+   * loaded on next startup, and updates the Colour menu in the parent
+   * AlignFrame (if there is one). Note this action does not including applying
+   * the colour scheme.
+   * 
+   * @param filePath
    */
-  protected void cancelButton_actionPerformed(ActionEvent e)
+  protected void addNewColourScheme(String filePath)
   {
-    if (ap != null)
+    /*
+     * update the delimited list of user defined colour files in
+     * Jalview property USER_DEFINED_COLOURS
+     */
+    String defaultColours = Cache
+            .getDefault(USER_DEFINED_COLOURS, filePath);
+    if (defaultColours.indexOf(filePath) == -1)
     {
-      if (seqGroup != null)
-      {
-        seqGroup.cs = oldColourScheme;
-      }
-      else if (ap != null)
+      if (defaultColours.length() > 0)
       {
-        ap.av.setGlobalColourScheme(oldColourScheme);
+        defaultColours = defaultColours.concat("|");
       }
-      ap.paintAlignment(true);
+      defaultColours = defaultColours.concat(filePath);
     }
+    Cache.setProperty(USER_DEFINED_COLOURS, defaultColours);
 
-    if (jmol != null)
-    {
-      jmol.setJalviewColourScheme(oldColourScheme);
-    }
+    /*
+     * construct and register the colour scheme
+     */
+    UserColourScheme ucs = getSchemeFromButtons();
+    ColourSchemes.getInstance().registerColourScheme(ucs);
 
-    try
-    {
-      frame.setClosed(true);
-    }
-    catch (Exception ex)
+    /*
+     * update the Colour menu items
+     */
+    if (ap != null)
     {
+      ap.alignFrame.buildColourMenu();
     }
   }
 
-  static Hashtable userColourSchemes;
-
-  public static Hashtable getUserColourSchemes()
-  {
-    return userColourSchemes;
-  }
-
-  public static void initUserColourSchemes(String files)
+  /**
+   * Saves the colour scheme to file in XML format
+   * 
+   * @param path
+   */
+  protected void saveToFile(File toFile)
   {
-    userColourSchemes = new Hashtable();
-
-    if (files == null || files.length() == 0)
+    /*
+     * build a Java model of colour scheme as XML, and 
+     * marshal to file
+     */
+    JalviewUserColours ucs = new JalviewUserColours();
+    ucs.setSchemeName(schemeName.getText());
+    try
     {
-      return;
-    }
+      PrintWriter out = new PrintWriter(new OutputStreamWriter(
+              new FileOutputStream(toFile), "UTF-8"));
 
-    // In case colours can't be loaded, we'll remove them
-    // from the default list here.
-    StringBuffer coloursFound = new StringBuffer();
-    StringTokenizer st = new StringTokenizer(files, "|");
-    while (st.hasMoreElements())
-    {
-      String file = st.nextToken();
-      try
+      for (int i = 0; i < buttonPanel.getComponentCount(); i++)
       {
-        UserColourScheme ucs = loadColours(file);
-        if (ucs != null)
-        {
-          if (coloursFound.length() > 0)
-          {
-            coloursFound.append("|");
-          }
-          coloursFound.append(file);
-          userColourSchemes.put(ucs.getName(), ucs);
-        }
-      }
-      catch (Exception ex)
-      {
-        System.out.println("Error loading User ColourFile\n" + ex);
+        JButton button = (JButton) buttonPanel.getComponent(i);
+        Colour col = new Colour();
+        col.setName(button.getText());
+        col.setRGB(Format.getHexString(button.getBackground()));
+        ucs.addColour(col);
       }
-    }
-    if (!files.equals(coloursFound.toString()))
+      ucs.marshal(out);
+      out.close();
+    } catch (Exception ex)
     {
-      if (coloursFound.toString().length() > 1)
-      {
-        jalview.bin.Cache.setProperty("USER_DEFINED_COLOURS",
-                                      coloursFound.toString());
-      }
-      else
-      {
-        jalview.bin.Cache.applicationProperties.remove("USER_DEFINED_COLOURS");
-      }
+      ex.printStackTrace();
     }
   }
 
-  public static void removeColourFromDefaults(String target)
+  /**
+   * On cancel, restores the colour scheme before the dialogue was opened
+   * 
+   * @param e
+   */
+  @Override
+  protected void cancelButton_actionPerformed(ActionEvent e)
   {
-    // The only way to find colours by name is to load them in
-    // In case colours can't be loaded, we'll remove them
-    // from the default list here.
-
-    userColourSchemes = new Hashtable();
-
-    StringBuffer coloursFound = new StringBuffer();
-    StringTokenizer st = new StringTokenizer(
-        jalview.bin.Cache.getProperty("USER_DEFINED_COLOURS"), "|");
-
-    while (st.hasMoreElements())
+    if (ap != null)
     {
-      String file = st.nextToken();
-      try
+      if (seqGroup != null)
       {
-        UserColourScheme ucs = loadColours(file);
-        if (ucs != null && !ucs.getName().equals(target))
-        {
-          if (coloursFound.length() > 0)
-          {
-            coloursFound.append("|");
-          }
-          coloursFound.append(file);
-          userColourSchemes.put(ucs.getName(), ucs);
-        }
+        seqGroup.setColourScheme(oldColourScheme);
       }
-      catch (Exception ex)
+      else
       {
-        System.out.println("Error loading User ColourFile\n" + ex);
+        ap.alignFrame.changeColour(oldColourScheme);
       }
+      ap.paintAlignment(true);
     }
 
-    if (coloursFound.toString().length() > 1)
+    if (structureViewer != null)
     {
-      jalview.bin.Cache.setProperty("USER_DEFINED_COLOURS",
-                                    coloursFound.toString());
+      structureViewer.setJalviewColourScheme(oldColourScheme);
     }
-    else
+
+    try
+    {
+      frame.setClosed(true);
+    } catch (Exception ex)
     {
-      jalview.bin.Cache.applicationProperties.remove("USER_DEFINED_COLOURS");
     }
-
   }
 
+  @Override
   public void caseSensitive_actionPerformed(ActionEvent e)
   {
     resetButtonPanel(caseSensitive.isSelected());
     lcaseColour.setEnabled(caseSensitive.isSelected());
   }
 
+  @Override
   public void lcaseColour_actionPerformed(ActionEvent e)
   {
     if (selectedButtons == null)
     {
-      selectedButtons = new Vector();
+      selectedButtons = new ArrayList<JButton>();
     }
     else
     {
@@ -924,5 +863,4 @@ public class UserDefinedColours
     }
     selectedButtons.add(lcaseColour);
   }
-
 }