Jalview-JS/JAL-3253-applet adding more applet parameters and setting
[jalview.git] / src / jalview / gui / Preferences.java
index 9ee3077..62c1239 100755 (executable)
@@ -24,15 +24,20 @@ import jalview.analysis.AnnotationSorter.SequenceAnnotationOrder;
 import jalview.bin.Cache;
 import jalview.gui.Help.HelpId;
 import jalview.gui.StructureViewer.ViewerType;
+import jalview.io.BackupFiles;
+import jalview.io.FileFormatI;
 import jalview.io.JalviewFileChooser;
 import jalview.io.JalviewFileView;
 import jalview.jbgui.GPreferences;
 import jalview.jbgui.GSequenceLink;
-import jalview.schemes.ColourSchemeProperty;
+import jalview.schemes.ColourSchemeI;
+import jalview.schemes.ColourSchemes;
+import jalview.schemes.ResidueColourScheme;
 import jalview.urls.UrlLinkTableModel;
 import jalview.urls.api.UrlProviderFactoryI;
 import jalview.urls.api.UrlProviderI;
 import jalview.urls.desktop.DesktopUrlProviderFactory;
+import jalview.util.BrowserLauncher;
 import jalview.util.MessageManager;
 import jalview.util.Platform;
 import jalview.util.UrlConstants;
@@ -51,10 +56,9 @@ import java.util.ArrayList;
 import java.util.List;
 
 import javax.help.HelpSetException;
-import javax.swing.JColorChooser;
+import javax.swing.JComboBox;
 import javax.swing.JFileChooser;
 import javax.swing.JInternalFrame;
-import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.ListSelectionModel;
 import javax.swing.RowFilter;
@@ -77,8 +81,13 @@ import ext.edu.ucsf.rbvi.strucviz2.StructureManager;
  * @author $author$
  * @version $Revision$
  */
+@SuppressWarnings("serial")
 public class Preferences extends GPreferences
 {
+  public static final String ANNOTATIONCOLOUR_MAX = "ANNOTATIONCOLOUR_MAX";
+
+  public static final String ANNOTATIONCOLOUR_MIN = "ANNOTATIONCOLOUR_MIN";
+
   public static final String ENABLE_SPLIT_FRAME = "ENABLE_SPLIT_FRAME";
 
   public static final String SCALE_PROTEIN_TO_CDNA = "SCALE_PROTEIN_TO_CDNA";
@@ -101,10 +110,50 @@ public class Preferences extends GPreferences
 
   public static final String CHIMERA_PATH = "CHIMERA_PATH";
 
+  public static final String SORT_ALIGNMENT = "SORT_ALIGNMENT";
+
+  public static final String WRAP_ALIGNMENT = "WRAP_ALIGNMENT";
+
   public static final String SORT_ANNOTATIONS = "SORT_ANNOTATIONS";
 
+  public static final String SORT_BY_TREE = "SORT_BY_TREE";
+
+  public static final String SHOW_ANNOTATIONS = "SHOW_ANNOTATIONS";
+
   public static final String SHOW_AUTOCALC_ABOVE = "SHOW_AUTOCALC_ABOVE";
 
+  public static final String SHOW_CONSERVATION = "SHOW_CONSERVATION";
+
+  public static final String SHOW_QUALITY = "SHOW_QUALITY";
+
+  public static final String SHOW_CONSENSUS_HISTOGRAM = "SHOW_CONSENSUS_HISTOGRAM";
+
+  public static final String SHOW_CONSENSUS = "SHOW_CONSENSUS";
+
+  public static final String SHOW_CONSENSUS_LOGO = "SHOW_CONSENSUS_LOGO";
+
+  public static final String SHOW_GROUP_CONSENSUS = "SHOW_GROUP_CONSENSUS";
+
+  public static final String SHOW_GROUP_CONSERVATION = "SHOW_GROUP_CONSERVATION";
+
+  public static final String NORMALISE_CONSENSUS_LOGO = "NORMALISE_CONSENSUS_LOGO";
+
+  public static final String NORMALISE_LOGO = "NORMALISE_LOGO";
+
+  public static final String SHOW_OCCUPANCY = "SHOW_OCCUPANCY";
+
+  public static final String SHOW_OVERVIEW = "SHOW_OVERVIEW";
+
+  public static final String SHOW_UNCONSERVED = "SHOW_UNCONSERVED";
+
+  public static final String SHOW_OV_HIDDEN_AT_START = "SHOW_OV_HIDDEN_AT_START";
+
+  public static final String USE_LEGACY_GAP = "USE_LEGACY_GAP";
+
+  public static final String GAP_COLOUR = "GAP_COLOUR";
+
+  public static final String HIDDEN_COLOUR = "HIDDEN_COLOUR";
+
   private static final int MIN_FONT_SIZE = 1;
 
   private static final int MAX_FONT_SIZE = 30;
@@ -113,9 +162,9 @@ public class Preferences extends GPreferences
    * Holds name and link separated with | character. Sequence ID must be
    * $SEQUENCE_ID$ or $SEQUENCE_ID=/.possible | chars ./=$
    */
-  public static UrlProviderI sequenceUrlLinks;
+  public static UrlProviderI sequenceUrlLinks; // must be nonfinal for test
 
-  public static UrlLinkTableModel dataModel;
+  public final static UrlLinkTableModel dataModel;
 
   /**
    * Holds name and link separated with | character. Sequence IDS and Sequences
@@ -125,7 +174,8 @@ public class Preferences extends GPreferences
    * (TODO: proper escape for using | to separate ids or sequences
    */
 
-  public static List<String> groupURLLinks;
+  public static final List<String> groupURLLinks; // not implemented
+
   static
   {
     // get links selected to be in the menu (SEQUENCE_LINKS)
@@ -151,13 +201,11 @@ public class Preferences extends GPreferences
      * .properties file as '|' separated strings
      */
 
-    groupURLLinks = new ArrayList<String>();
+    groupURLLinks = new ArrayList<>(); // not implemented
   }
 
   JInternalFrame frame;
 
-  DasSourceBrowser dasSource;
-
   private WsPreferences wsPrefs;
 
   private OptionsParam promptEachTimeOpt = new OptionsParam(
@@ -178,13 +226,18 @@ public class Preferences extends GPreferences
     super();
     frame = new JInternalFrame();
     frame.setContentPane(this);
-    dasSource = new DasSourceBrowser();
-    dasTab.add(dasSource, BorderLayout.CENTER);
-    wsPrefs = new WsPreferences();
-    wsTab.add(wsPrefs, BorderLayout.CENTER);
+    if (!Platform.isJS())
+    /**
+     * Java only
+     * 
+     * @j2sIgnore
+     */
+    {
+      wsPrefs = new WsPreferences();
+      wsTab.add(wsPrefs, BorderLayout.CENTER);
+    }
     int width = 500, height = 450;
-    new jalview.util.Platform();
-    if (Platform.isAMac())
+    if (Platform.isAMacAndNotJS())
     {
       width = 570;
       height = 480;
@@ -202,24 +255,25 @@ public class Preferences extends GPreferences
     fullScreen.setSelected(Cache.getDefault("SHOW_FULLSCREEN", false));
     annotations.setSelected(Cache.getDefault("SHOW_ANNOTATIONS", true));
 
-    conservation.setSelected(Cache.getDefault("SHOW_CONSERVATION", true));
-    quality.setSelected(Cache.getDefault("SHOW_QUALITY", true));
+    conservation.setSelected(Cache.getDefault(SHOW_CONSERVATION, true));
+    quality.setSelected(Cache.getDefault(SHOW_QUALITY, true));
     identity.setSelected(Cache.getDefault("SHOW_IDENTITY", true));
-    openoverv.setSelected(Cache.getDefault("SHOW_OVERVIEW", false));
+    openoverv.setSelected(Cache.getDefault(SHOW_OVERVIEW, false));
     showUnconserved
-            .setSelected(Cache.getDefault("SHOW_UNCONSERVED", false));
-    showGroupConsensus.setSelected(Cache.getDefault("SHOW_GROUP_CONSENSUS",
-            false));
-    showGroupConservation.setSelected(Cache.getDefault(
-            "SHOW_GROUP_CONSERVATION", false));
-    showConsensHistogram.setSelected(Cache.getDefault(
-            "SHOW_CONSENSUS_HISTOGRAM", true));
-    showConsensLogo.setSelected(Cache.getDefault("SHOW_CONSENSUS_LOGO",
-            false));
-    showNpTooltip.setSelected(Cache
-            .getDefault("SHOW_NPFEATS_TOOLTIP", true));
-    showDbRefTooltip.setSelected(Cache.getDefault("SHOW_DBREFS_TOOLTIP",
-            true));
+            .setSelected(Cache.getDefault(SHOW_UNCONSERVED, false));
+    showOccupancy.setSelected(Cache.getDefault(SHOW_OCCUPANCY, false));
+    showGroupConsensus
+            .setSelected(Cache.getDefault(SHOW_GROUP_CONSENSUS, false));
+    showGroupConservation.setSelected(
+            Cache.getDefault(SHOW_GROUP_CONSERVATION, false));
+    showConsensHistogram.setSelected(
+            Cache.getDefault(SHOW_CONSENSUS_HISTOGRAM, true));
+    showConsensLogo
+            .setSelected(Cache.getDefault(SHOW_CONSENSUS_LOGO, false));
+    showNpTooltip
+            .setSelected(Cache.getDefault("SHOW_NPFEATS_TOOLTIP", true));
+    showDbRefTooltip
+            .setSelected(Cache.getDefault("SHOW_DBREFS_TOOLTIP", true));
 
     String[] fonts = java.awt.GraphicsEnvironment
             .getLocalGraphicsEnvironment().getAvailableFontFamilyNames();
@@ -239,12 +293,12 @@ public class Preferences extends GPreferences
 
     fontNameCB.setSelectedItem(Cache.getDefault("FONT_NAME", "SansSerif"));
     fontSizeCB.setSelectedItem(Cache.getDefault("FONT_SIZE", "10"));
-    fontStyleCB.setSelectedItem(Cache.getDefault("FONT_STYLE", Font.PLAIN
-            + ""));
+    fontStyleCB.setSelectedItem(
+            Cache.getDefault("FONT_STYLE", Font.PLAIN + ""));
 
     smoothFont.setSelected(Cache.getDefault("ANTI_ALIAS", false));
-    scaleProteinToCdna.setSelected(Cache.getDefault(SCALE_PROTEIN_TO_CDNA,
-            false));
+    scaleProteinToCdna
+            .setSelected(Cache.getDefault(SCALE_PROTEIN_TO_CDNA, false));
 
     idItalics.setSelected(Cache.getDefault("ID_ITALICS", true));
 
@@ -258,7 +312,7 @@ public class Preferences extends GPreferences
     sortby.addItem("No sort");
     sortby.addItem("Id");
     sortby.addItem("Pairwise Identity");
-    sortby.setSelectedItem(Cache.getDefault("SORT_ALIGNMENT", "No sort"));
+    sortby.setSelectedItem(Cache.getDefault(SORT_ALIGNMENT, "No sort"));
 
     sortAnnBy.addItem(SequenceAnnotationOrder.NONE.toString());
     sortAnnBy
@@ -284,20 +338,39 @@ public class Preferences extends GPreferences
     /*
      * Set Colours tab defaults
      */
-    for (int i = ColourSchemeProperty.FIRST_COLOUR; i <= ColourSchemeProperty.LAST_COLOUR; i++)
+    protColour.addItem(ResidueColourScheme.NONE);
+    nucColour.addItem(ResidueColourScheme.NONE);
+    for (ColourSchemeI cs : ColourSchemes.getInstance().getColourSchemes())
     {
-      protColour.addItem(ColourSchemeProperty.getColourName(i));
-      nucColour.addItem(ColourSchemeProperty.getColourName(i));
+      String name = cs.getSchemeName();
+      protColour.addItem(name);
+      nucColour.addItem(name);
     }
-    String oldProp = Cache.getDefault(DEFAULT_COLOUR, "None");
+    String oldProp = Cache.getDefault(DEFAULT_COLOUR,
+            ResidueColourScheme.NONE);
     String newProp = Cache.getDefault(DEFAULT_COLOUR_PROT, null);
     protColour.setSelectedItem(newProp != null ? newProp : oldProp);
     newProp = Cache.getDefault(DEFAULT_COLOUR_NUC, null);
     nucColour.setSelectedItem(newProp != null ? newProp : oldProp);
-    minColour.setBackground(Cache.getDefaultColour("ANNOTATIONCOLOUR_MIN",
-            Color.orange));
-    maxColour.setBackground(Cache.getDefaultColour("ANNOTATIONCOLOUR_MAX",
-            Color.red));
+    minColour.setBackground(
+            Cache.getDefaultColour(ANNOTATIONCOLOUR_MIN, Color.orange));
+    maxColour.setBackground(
+            Cache.getDefaultColour(ANNOTATIONCOLOUR_MAX, Color.red));
+
+    /*
+     * Set overview panel defaults
+     */
+    gapColour.setBackground(
+            Cache.getDefaultColour(GAP_COLOUR,
+                    jalview.renderer.OverviewResColourFinder.OVERVIEW_DEFAULT_GAP));
+    hiddenColour.setBackground(
+            Cache.getDefaultColour(HIDDEN_COLOUR,
+                    jalview.renderer.OverviewResColourFinder.OVERVIEW_DEFAULT_HIDDEN));
+    useLegacyGap.setSelected(Cache.getDefault(USE_LEGACY_GAP, false));
+    gapLabel.setEnabled(!useLegacyGap.isSelected());
+    gapColour.setEnabled(!useLegacyGap.isSelected());
+    showHiddenAtStart
+            .setSelected(Cache.getDefault(SHOW_OV_HIDDEN_AT_START, false));
 
     /*
      * Set Structure tab defaults.
@@ -310,8 +383,8 @@ public class Preferences extends GPreferences
     addSecondaryStructure.setEnabled(structSelected);
     addTempFactor.setSelected(Cache.getDefault(ADD_TEMPFACT_ANN, false));
     addTempFactor.setEnabled(structSelected);
-    structViewer.setSelectedItem(Cache.getDefault(STRUCTURE_DISPLAY,
-            ViewerType.JMOL.name()));
+    structViewer.setSelectedItem(
+            Cache.getDefault(STRUCTURE_DISPLAY, ViewerType.JMOL.name()));
     chimeraPath.setText(Cache.getDefault(CHIMERA_PATH, ""));
     chimeraPath.addActionListener(new ActionListener()
     {
@@ -346,16 +419,17 @@ public class Preferences extends GPreferences
     List<RowSorter.SortKey> sortKeys = new ArrayList<>();
 
     UrlLinkTableModel m = (UrlLinkTableModel) linkUrlTable.getModel();
-    sortKeys.add(new RowSorter.SortKey(m.getDefaultColumn(),
+    sortKeys.add(new RowSorter.SortKey(m.getPrimaryColumn(),
             SortOrder.DESCENDING));
     sortKeys.add(new RowSorter.SortKey(m.getSelectedColumn(),
             SortOrder.DESCENDING));
-    sortKeys.add(new RowSorter.SortKey(m.getNameColumn(),
-            SortOrder.ASCENDING));
+    sortKeys.add(
+            new RowSorter.SortKey(m.getNameColumn(), SortOrder.ASCENDING));
 
     sorter.setSortKeys(sortKeys);
-    sorter.sort();
-    
+    // BH 2018 setSortKeys will do the sort
+    // sorter.sort();
+
     // set up filtering
     ActionListener onReset;
     onReset = new ActionListener()
@@ -404,35 +478,35 @@ public class Preferences extends GPreferences
       @Override
       public void changedUpdate(DocumentEvent e)
       {
-        sorter.setRowFilter(RowFilter.regexFilter(caseInsensitiveFlag
-                + filterTB.getText()));
+        sorter.setRowFilter(RowFilter
+                .regexFilter(caseInsensitiveFlag + filterTB.getText()));
       }
 
       @Override
       public void removeUpdate(DocumentEvent e)
       {
-        sorter.setRowFilter(RowFilter.regexFilter(caseInsensitiveFlag
-                + filterTB.getText()));
+        sorter.setRowFilter(RowFilter
+                .regexFilter(caseInsensitiveFlag + filterTB.getText()));
       }
 
       @Override
       public void insertUpdate(DocumentEvent e)
       {
-        sorter.setRowFilter(RowFilter.regexFilter(caseInsensitiveFlag
-                + filterTB.getText()));
+        sorter.setRowFilter(RowFilter
+                .regexFilter(caseInsensitiveFlag + filterTB.getText()));
       }
     });
 
     // set up list selection functionality
-    linkUrlTable.getSelectionModel().addListSelectionListener(
-            new UrlListSelectionHandler());
+    linkUrlTable.getSelectionModel()
+            .addListSelectionListener(new UrlListSelectionHandler());
 
     // set up radio buttons
     int onClickCol = ((UrlLinkTableModel) linkUrlTable.getModel())
-            .getDefaultColumn();
+            .getPrimaryColumn();
     String onClickName = linkUrlTable.getColumnName(onClickCol);
-    linkUrlTable.getColumn(onClickName).setCellRenderer(
-               new RadioButtonRenderer());
+    linkUrlTable.getColumn(onClickName)
+            .setCellRenderer(new RadioButtonRenderer());
     linkUrlTable.getColumn(onClickName)
             .setCellEditor(new RadioButtonEditor());
 
@@ -442,8 +516,8 @@ public class Preferences extends GPreferences
       if (linkUrlTable.getModel().getColumnClass(column)
               .equals(Boolean.class))
       {
-        TableColumn tableColumn = linkUrlTable.getColumnModel().getColumn(
-                column);
+        TableColumn tableColumn = linkUrlTable.getColumnModel()
+                .getColumn(column);
         int preferredWidth = tableColumn.getMinWidth();
 
         TableCellRenderer cellRenderer = linkUrlTable.getCellRenderer(0,
@@ -459,8 +533,6 @@ public class Preferences extends GPreferences
 
     useProxy.setSelected(Cache.getDefault("USE_PROXY", false));
     useProxy_actionPerformed(); // make sure useProxy is correctly initialised
-    proxyServerTB.setEnabled(useProxy.isSelected());
-    proxyPortTB.setEnabled(useProxy.isSelected());
     proxyServerTB.setText(Cache.getDefault("PROXY_SERVER", ""));
     proxyPortTB.setText(Cache.getDefault("PROXY_PORT", ""));
 
@@ -475,28 +547,16 @@ public class Preferences extends GPreferences
     /*
      * Set Output tab defaults
      */
-    epsRendering.addItem(promptEachTimeOpt);
-    epsRendering.addItem(lineArtOpt);
-    epsRendering.addItem(textOpt);
-    String defaultEPS = Cache.getDefault("EPS_RENDERING",
-            "Prompt each time");
-    if (defaultEPS.equalsIgnoreCase("Text"))
-    {
-      epsRendering.setSelectedItem(textOpt);
-    }
-    else if (defaultEPS.equalsIgnoreCase("Lineart"))
-    {
-      epsRendering.setSelectedItem(lineArtOpt);
-    }
-    else
-    {
-      epsRendering.setSelectedItem(promptEachTimeOpt);
-    }
+    setupOutputCombo(epsRendering, "EPS_RENDERING");
+    setupOutputCombo(htmlRendering, "HTML_RENDERING");
+    setupOutputCombo(svgRendering, "SVG_RENDERING");
     autoIdWidth.setSelected(Cache.getDefault("FIGURE_AUTOIDWIDTH", false));
     userIdWidth.setEnabled(!autoIdWidth.isSelected());
     userIdWidthlabel.setEnabled(!autoIdWidth.isSelected());
-    Integer wi = Cache.getIntegerProperty("FIGURE_USERIDWIDTH");
+    Integer wi = Cache.getIntegerProperty("FIGURE_FIXEDIDWIDTH");
     userIdWidth.setText(wi == null ? "" : wi.toString());
+    // TODO: refactor to use common enum via FormatAdapter and allow extension
+    // for new flat file formats
     blcjv.setSelected(Cache.getDefault("BLC_JVSUFFIX", true));
     clustaljv.setSelected(Cache.getDefault("CLUSTAL_JVSUFFIX", true));
     fastajv.setSelected(Cache.getDefault("FASTA_JVSUFFIX", true));
@@ -505,19 +565,58 @@ public class Preferences extends GPreferences
     pileupjv.setSelected(Cache.getDefault("PILEUP_JVSUFFIX", true));
     pirjv.setSelected(Cache.getDefault("PIR_JVSUFFIX", true));
     modellerOutput.setSelected(Cache.getDefault("PIR_MODELLER", false));
-    embbedBioJSON.setSelected(Cache.getDefault("EXPORT_EMBBED_BIOJSON",
-            true));
+    embbedBioJSON
+            .setSelected(Cache.getDefault("EXPORT_EMBBED_BIOJSON", true));
 
     /*
      * Set Editing tab defaults
      */
-    autoCalculateConsCheck.setSelected(Cache.getDefault(
-            "AUTO_CALC_CONSENSUS", true));
+    autoCalculateConsCheck
+            .setSelected(Cache.getDefault("AUTO_CALC_CONSENSUS", true));
     padGaps.setSelected(Cache.getDefault("PAD_GAPS", false));
-    sortByTree.setSelected(Cache.getDefault("SORT_BY_TREE", false));
+    sortByTree.setSelected(Cache.getDefault(SORT_BY_TREE, false));
 
     annotations_actionPerformed(null); // update the display of the annotation
                                        // settings
+    
+    
+    /*
+     * Set Backups tab defaults
+     */
+    loadLastSavedBackupsOptions();
+  }
+
+  /**
+   * A helper method that sets the items and initial selection in a character
+   * rendering option list (Prompt each time/Lineart/Text)
+   * 
+   * @param comboBox
+   * @param propertyKey
+   */
+  protected void setupOutputCombo(JComboBox<Object> comboBox,
+          String propertyKey)
+  {
+    comboBox.addItem(promptEachTimeOpt);
+    comboBox.addItem(lineArtOpt);
+    comboBox.addItem(textOpt);
+    
+    /*
+     * JalviewJS doesn't support Lineart so force it to Text
+     */
+    String defaultOption = Platform.isJS() ? "Text"
+            : Cache.getDefault(propertyKey, "Prompt each time");
+    if (defaultOption.equalsIgnoreCase("Text"))
+    {
+      comboBox.setSelectedItem(textOpt);
+    }
+    else if (defaultOption.equalsIgnoreCase("Lineart"))
+    {
+      comboBox.setSelectedItem(lineArtOpt);
+    }
+    else
+    {
+      comboBox.setSelectedItem(promptEachTimeOpt);
+    }
   }
 
   /**
@@ -537,148 +636,168 @@ public class Preferences extends GPreferences
     /*
      * Save Visual settings
      */
-    Cache.applicationProperties.setProperty("SHOW_JVSUFFIX",
+    Cache.setPropertyNoSave("SHOW_JVSUFFIX",
             Boolean.toString(seqLimit.isSelected()));
-    Cache.applicationProperties.setProperty("RIGHT_ALIGN_IDS",
+    Cache.setPropertyNoSave("RIGHT_ALIGN_IDS",
             Boolean.toString(rightAlign.isSelected()));
-    Cache.applicationProperties.setProperty("SHOW_FULLSCREEN",
+    Cache.setPropertyNoSave("SHOW_FULLSCREEN",
             Boolean.toString(fullScreen.isSelected()));
-    Cache.applicationProperties.setProperty("SHOW_OVERVIEW",
+    Cache.setPropertyNoSave("SHOW_OVERVIEW",
             Boolean.toString(openoverv.isSelected()));
-    Cache.applicationProperties.setProperty("SHOW_ANNOTATIONS",
+    Cache.setPropertyNoSave("SHOW_ANNOTATIONS",
             Boolean.toString(annotations.isSelected()));
-    Cache.applicationProperties.setProperty("SHOW_CONSERVATION",
+    Cache.setPropertyNoSave(SHOW_CONSERVATION,
             Boolean.toString(conservation.isSelected()));
-    Cache.applicationProperties.setProperty("SHOW_QUALITY",
+    Cache.setPropertyNoSave(SHOW_QUALITY,
             Boolean.toString(quality.isSelected()));
-    Cache.applicationProperties.setProperty("SHOW_IDENTITY",
+    Cache.setPropertyNoSave("SHOW_IDENTITY",
             Boolean.toString(identity.isSelected()));
 
-    Cache.applicationProperties.setProperty("GAP_SYMBOL", gapSymbolCB
-            .getSelectedItem().toString());
+    Cache.setPropertyNoSave("GAP_SYMBOL",
+            gapSymbolCB.getSelectedItem().toString());
 
-    Cache.applicationProperties.setProperty("FONT_NAME", fontNameCB
-            .getSelectedItem().toString());
-    Cache.applicationProperties.setProperty("FONT_STYLE", fontStyleCB
-            .getSelectedItem().toString());
-    Cache.applicationProperties.setProperty("FONT_SIZE", fontSizeCB
-            .getSelectedItem().toString());
+    Cache.setPropertyNoSave("FONT_NAME",
+            fontNameCB.getSelectedItem().toString());
+    Cache.setPropertyNoSave("FONT_STYLE",
+            fontStyleCB.getSelectedItem().toString());
+    Cache.setPropertyNoSave("FONT_SIZE",
+            fontSizeCB.getSelectedItem().toString());
 
-    Cache.applicationProperties.setProperty("ID_ITALICS",
+    Cache.setPropertyNoSave("ID_ITALICS",
             Boolean.toString(idItalics.isSelected()));
-    Cache.applicationProperties.setProperty("SHOW_UNCONSERVED",
+    Cache.setPropertyNoSave("SHOW_UNCONSERVED",
             Boolean.toString(showUnconserved.isSelected()));
-    Cache.applicationProperties.setProperty("SHOW_GROUP_CONSENSUS",
+    Cache.setPropertyNoSave(SHOW_OCCUPANCY,
+            Boolean.toString(showOccupancy.isSelected()));
+    Cache.setPropertyNoSave(SHOW_GROUP_CONSENSUS,
             Boolean.toString(showGroupConsensus.isSelected()));
-    Cache.applicationProperties.setProperty("SHOW_GROUP_CONSERVATION",
+    Cache.setPropertyNoSave(SHOW_GROUP_CONSERVATION,
             Boolean.toString(showGroupConservation.isSelected()));
-    Cache.applicationProperties.setProperty("SHOW_CONSENSUS_HISTOGRAM",
+    Cache.setPropertyNoSave(SHOW_CONSENSUS_HISTOGRAM,
             Boolean.toString(showConsensHistogram.isSelected()));
-    Cache.applicationProperties.setProperty("SHOW_CONSENSUS_LOGO",
+    Cache.setPropertyNoSave(SHOW_CONSENSUS_LOGO,
             Boolean.toString(showConsensLogo.isSelected()));
-    Cache.applicationProperties.setProperty("ANTI_ALIAS",
+    Cache.setPropertyNoSave("ANTI_ALIAS",
             Boolean.toString(smoothFont.isSelected()));
-    Cache.applicationProperties.setProperty(SCALE_PROTEIN_TO_CDNA,
+    Cache.setPropertyNoSave(SCALE_PROTEIN_TO_CDNA,
             Boolean.toString(scaleProteinToCdna.isSelected()));
-    Cache.applicationProperties.setProperty("SHOW_NPFEATS_TOOLTIP",
+    Cache.setPropertyNoSave("SHOW_NPFEATS_TOOLTIP",
             Boolean.toString(showNpTooltip.isSelected()));
-    Cache.applicationProperties.setProperty("SHOW_DBREFS_TOOLTIP",
+    Cache.setPropertyNoSave("SHOW_DBREFS_TOOLTIP",
             Boolean.toString(showDbRefTooltip.isSelected()));
 
-    Cache.applicationProperties.setProperty("WRAP_ALIGNMENT",
+    Cache.setPropertyNoSave("WRAP_ALIGNMENT",
             Boolean.toString(wrap.isSelected()));
 
-    Cache.applicationProperties.setProperty("STARTUP_FILE",
+    Cache.setPropertyNoSave("STARTUP_FILE",
             startupFileTextfield.getText());
-    Cache.applicationProperties.setProperty("SHOW_STARTUP_FILE",
+    Cache.setPropertyNoSave("SHOW_STARTUP_FILE",
             Boolean.toString(startupCheckbox.isSelected()));
 
-    Cache.applicationProperties.setProperty("SORT_ALIGNMENT", sortby
-            .getSelectedItem().toString());
+    Cache.setPropertyNoSave(SORT_ALIGNMENT,
+            sortby.getSelectedItem().toString());
 
     // convert description of sort order to enum name for save
     SequenceAnnotationOrder annSortOrder = SequenceAnnotationOrder
             .forDescription(sortAnnBy.getSelectedItem().toString());
     if (annSortOrder != null)
     {
-      Cache.applicationProperties.setProperty(SORT_ANNOTATIONS,
+      Cache.setPropertyNoSave(SORT_ANNOTATIONS,
               annSortOrder.name());
     }
 
     final boolean showAutocalcFirst = sortAutocalc.getSelectedIndex() == 0;
-    Cache.applicationProperties.setProperty(SHOW_AUTOCALC_ABOVE, Boolean
-            .valueOf(showAutocalcFirst).toString());
+    Cache.setPropertyNoSave(SHOW_AUTOCALC_ABOVE,
+            Boolean.valueOf(showAutocalcFirst).toString());
 
     /*
      * Save Colours settings
      */
-    Cache.applicationProperties.setProperty(DEFAULT_COLOUR_PROT, protColour
-            .getSelectedItem().toString());
-    Cache.applicationProperties.setProperty(DEFAULT_COLOUR_NUC, nucColour
-            .getSelectedItem().toString());
-    Cache.setColourProperty("ANNOTATIONCOLOUR_MIN",
+    Cache.setPropertyNoSave(DEFAULT_COLOUR_PROT,
+            protColour.getSelectedItem().toString());
+    Cache.setPropertyNoSave(DEFAULT_COLOUR_NUC,
+            nucColour.getSelectedItem().toString());
+    Cache.setColourProperty(ANNOTATIONCOLOUR_MIN,
             minColour.getBackground());
-    Cache.setColourProperty("ANNOTATIONCOLOUR_MAX",
+    Cache.setColourProperty(ANNOTATIONCOLOUR_MAX,
             maxColour.getBackground());
 
     /*
+     * Save Overview settings
+     */
+    Cache.setColourProperty(GAP_COLOUR, gapColour.getBackground());
+    Cache.setColourProperty(HIDDEN_COLOUR, hiddenColour.getBackground());
+    Cache.setPropertyNoSave(USE_LEGACY_GAP,
+            Boolean.toString(useLegacyGap.isSelected()));
+    Cache.setPropertyNoSave(SHOW_OV_HIDDEN_AT_START,
+            Boolean.toString(showHiddenAtStart.isSelected()));
+
+    /*
      * Save Structure settings
      */
-    Cache.applicationProperties.setProperty(ADD_TEMPFACT_ANN,
+    Cache.setPropertyNoSave(ADD_TEMPFACT_ANN,
             Boolean.toString(addTempFactor.isSelected()));
-    Cache.applicationProperties.setProperty(ADD_SS_ANN,
+    Cache.setPropertyNoSave(ADD_SS_ANN,
             Boolean.toString(addSecondaryStructure.isSelected()));
-    Cache.applicationProperties.setProperty(USE_RNAVIEW,
+    Cache.setPropertyNoSave(USE_RNAVIEW,
             Boolean.toString(useRnaView.isSelected()));
-    Cache.applicationProperties.setProperty(STRUCT_FROM_PDB,
+    Cache.setPropertyNoSave(STRUCT_FROM_PDB,
             Boolean.toString(structFromPdb.isSelected()));
-    Cache.applicationProperties.setProperty(STRUCTURE_DISPLAY, structViewer
-            .getSelectedItem().toString());
+    Cache.setPropertyNoSave(STRUCTURE_DISPLAY,
+            structViewer.getSelectedItem().toString());
     Cache.setOrRemove(CHIMERA_PATH, chimeraPath.getText());
-    Cache.applicationProperties.setProperty("MAP_WITH_SIFTS",
+    Cache.setPropertyNoSave("MAP_WITH_SIFTS",
             Boolean.toString(siftsMapping.isSelected()));
     SiftsSettings.setMapWithSifts(siftsMapping.isSelected());
 
     /*
      * Save Output settings
      */
-    Cache.applicationProperties.setProperty("EPS_RENDERING",
+    Cache.setPropertyNoSave("EPS_RENDERING",
             ((OptionsParam) epsRendering.getSelectedItem()).getCode());
+    Cache.setPropertyNoSave("HTML_RENDERING",
+            ((OptionsParam) htmlRendering.getSelectedItem()).getCode());
+    Cache.setPropertyNoSave("SVG_RENDERING",
+            ((OptionsParam) svgRendering.getSelectedItem()).getCode());
 
-    /*
-     * Save Connections settings
+    if (!Platform.isJS())
+    /**
+     * @j2sNative
      */
-    Cache.setOrRemove("DEFAULT_BROWSER", defaultBrowser.getText());
-
-    jalview.util.BrowserLauncher.resetBrowser();
+    {
+      // Java only
+      // Save Connections settings
+      Cache.setOrRemove("DEFAULT_BROWSER", defaultBrowser.getText());
+      BrowserLauncher.resetBrowser();
+    }
 
     // save user-defined and selected links
     String menuLinks = sequenceUrlLinks.writeUrlsAsString(true);
     if (menuLinks.isEmpty())
     {
-      Cache.applicationProperties.remove("SEQUENCE_LINKS");
+      Cache.removePropertyNoSave("SEQUENCE_LINKS");
     }
     else
     {
-      Cache.applicationProperties.setProperty("SEQUENCE_LINKS",
+      Cache.setPropertyNoSave("SEQUENCE_LINKS",
               menuLinks.toString());
     }
 
     String nonMenuLinks = sequenceUrlLinks.writeUrlsAsString(false);
     if (nonMenuLinks.isEmpty())
     {
-      Cache.applicationProperties.remove("STORED_LINKS");
+      Cache.removePropertyNoSave("STORED_LINKS");
     }
     else
     {
-      Cache.applicationProperties.setProperty("STORED_LINKS",
+      Cache.setPropertyNoSave("STORED_LINKS",
               nonMenuLinks.toString());
     }
 
-    Cache.applicationProperties.setProperty("DEFAULT_URL",
-            sequenceUrlLinks.getDefaultUrlId());
+    Cache.setPropertyNoSave("DEFAULT_URL",
+            sequenceUrlLinks.getPrimaryUrlId());
 
-    Cache.applicationProperties.setProperty("USE_PROXY",
+    Cache.setPropertyNoSave("USE_PROXY",
             Boolean.toString(useProxy.isSelected()));
 
     Cache.setOrRemove("PROXY_SERVER", proxyServerTB.getText());
@@ -717,46 +836,67 @@ public class Preferences extends GPreferences
     /*
      * Save Output settings
      */
-    Cache.applicationProperties.setProperty("BLC_JVSUFFIX",
+    Cache.setPropertyNoSave("BLC_JVSUFFIX",
             Boolean.toString(blcjv.isSelected()));
-    Cache.applicationProperties.setProperty("CLUSTAL_JVSUFFIX",
+    Cache.setPropertyNoSave("CLUSTAL_JVSUFFIX",
             Boolean.toString(clustaljv.isSelected()));
-    Cache.applicationProperties.setProperty("FASTA_JVSUFFIX",
+    Cache.setPropertyNoSave("FASTA_JVSUFFIX",
             Boolean.toString(fastajv.isSelected()));
-    Cache.applicationProperties.setProperty("MSF_JVSUFFIX",
+    Cache.setPropertyNoSave("MSF_JVSUFFIX",
             Boolean.toString(msfjv.isSelected()));
-    Cache.applicationProperties.setProperty("PFAM_JVSUFFIX",
+    Cache.setPropertyNoSave("PFAM_JVSUFFIX",
             Boolean.toString(pfamjv.isSelected()));
-    Cache.applicationProperties.setProperty("PILEUP_JVSUFFIX",
+    Cache.setPropertyNoSave("PILEUP_JVSUFFIX",
             Boolean.toString(pileupjv.isSelected()));
-    Cache.applicationProperties.setProperty("PIR_JVSUFFIX",
+    Cache.setPropertyNoSave("PIR_JVSUFFIX",
             Boolean.toString(pirjv.isSelected()));
-    Cache.applicationProperties.setProperty("PIR_MODELLER",
+    Cache.setPropertyNoSave("PIR_MODELLER",
             Boolean.toString(modellerOutput.isSelected()));
-    Cache.applicationProperties.setProperty("EXPORT_EMBBED_BIOJSON",
+    Cache.setPropertyNoSave("EXPORT_EMBBED_BIOJSON",
             Boolean.toString(embbedBioJSON.isSelected()));
-    jalview.io.PIRFile.useModellerOutput = modellerOutput.isSelected();
-
-    Cache.applicationProperties.setProperty("FIGURE_AUTOIDWIDTH",
+    Cache.setPropertyNoSave("FIGURE_AUTOIDWIDTH",
             Boolean.toString(autoIdWidth.isSelected()));
     userIdWidth_actionPerformed();
-    Cache.applicationProperties.setProperty("FIGURE_USERIDWIDTH",
+    Cache.setPropertyNoSave("FIGURE_FIXEDIDWIDTH",
             userIdWidth.getText());
 
     /*
      * Save Editing settings
      */
-    Cache.applicationProperties.setProperty("AUTO_CALC_CONSENSUS",
+    Cache.setPropertyNoSave("AUTO_CALC_CONSENSUS",
             Boolean.toString(autoCalculateConsCheck.isSelected()));
-    Cache.applicationProperties.setProperty("SORT_BY_TREE",
+    Cache.setPropertyNoSave("SORT_BY_TREE",
             Boolean.toString(sortByTree.isSelected()));
-    Cache.applicationProperties.setProperty("PAD_GAPS",
+    Cache.setPropertyNoSave("PAD_GAPS",
             Boolean.toString(padGaps.isSelected()));
 
-    dasSource.saveProperties(Cache.applicationProperties);
-    wsPrefs.updateAndRefreshWsMenuConfig(false);
+    if (!Platform.isJS())
+    {
+      wsPrefs.updateAndRefreshWsMenuConfig(false);
+    }
+
+    /*
+     * Save Backups settings
+     */
+    Cache.setPropertyNoSave(BackupFiles.CONFIRM_DELETE_OLD,
+            Boolean.toString(backupfilesConfirmDelete.isSelected()));
+    Cache.setPropertyNoSave(BackupFiles.ENABLED,
+            Boolean.toString(enableBackupFiles.isSelected()));
+    Cache.setPropertyNoSave(BackupFiles.NO_MAX,
+            Boolean.toString(backupfilesKeepAll.isSelected()));
+    Cache.setPropertyNoSave(BackupFiles.REVERSE_ORDER,
+            Boolean.toString(suffixReverse.isSelected()));
+    Cache.setPropertyNoSave(BackupFiles.SUFFIX,
+            suffixTemplate.getText());
+    Cache.setPropertyNoSave(BackupFiles.ROLL_MAX,
+            Integer.toString(getSpinnerInt(backupfilesRollMaxSpinner, 4)));
+    Cache.setPropertyNoSave(BackupFiles.SUFFIX_DIGITS,
+            Integer.toString(getSpinnerInt(suffixDigitsSpinner, 3)));
+    Cache.setPropertyNoSave(BackupFiles.NS + "_PRESET",
+            Integer.toString(getComboIntStringKey(backupfilesPresetsCombo)));
+
     Cache.saveProperties();
-    Desktop.instance.doConfigureStructurePrefs();
+    Desktop.getInstance().doConfigureStructurePrefs();
     try
     {
       frame.setClosed(true);
@@ -765,6 +905,43 @@ public class Preferences extends GPreferences
     }
   }
 
+  public static void setAppletDefaults()
+  {
+
+    // http://www.jalview.org/old/v2_8/examples/appletParameters.html
+
+    // showConservation true or false Default is true.
+    // showQuality true or false Default is true.
+    // showConsensus true or false Default is true.
+    // showFeatureSettings true or false Shows the feature settings window when
+    // startin
+    // showTreeBootstraps true or false (default is true) show or hide branch
+    // bootstraps
+    // showTreeDistances true or false (default is true) show or hide branch
+    // lengths
+    // showUnlinkedTreeNodes true or false (default is false) indicate if
+    // unassociated nodes should be highlighted in the tree view
+    // showUnconserved true of false (default is false) When true, only gaps and
+    // symbols different to the consensus sequence ions of the alignment
+    // showGroupConsensus true of false (default is false) When true, shows
+    // consensus annotation row for any groups on the alignment. (since 2.7)
+    // showGroupConservation true of false (default is false) When true, shows
+    // amino-acid property conservation annotation row for any groups on the
+    // showConsensusHistogram true of false (default is true) When true, shows
+    // the percentage occurence of the consensus symbol for each column as a
+    // showSequenceLogo true of false (default is false) When true, shows a
+    // sequence logo above the consensus sequence (overlaid above the Consensus
+
+    Cache.setPropertyNoSave(SHOW_CONSERVATION, "true");
+    Cache.setPropertyNoSave(SHOW_QUALITY, "false");
+    Cache.setPropertyNoSave(SHOW_CONSENSUS, "true");
+    Cache.setPropertyNoSave("SHOW_UNCONSERVED", "false");
+    Cache.setPropertyNoSave("SHOW_GROUP_CONSERVATION", "false");
+    Cache.setPropertyNoSave("SHOW_GROUP_CONCENSUS", "false");
+
+    // TODO -- just a start here
+  }
+
   /**
    * Do any necessary validation before saving settings. Return focus to the
    * first tab which fails validation.
@@ -794,24 +971,26 @@ public class Preferences extends GPreferences
   @Override
   public void startupFileTextfield_mouseClicked()
   {
-    JalviewFileChooser chooser = new JalviewFileChooser(
-            jalview.bin.Cache.getProperty("LAST_DIRECTORY"), new String[] {
-                "fa, fasta, fastq", "aln", "pfam", "msf", "pir", "blc",
-                "jar" }, new String[] { "Fasta", "Clustal", "PFAM", "MSF",
-                "PIR", "BLC", "Jalview" },
-            jalview.bin.Cache.getProperty("DEFAULT_FILE_FORMAT"));
+    // TODO: JAL-3048 not needed for Jalview-JS
+    String fileFormat = Cache.getProperty("DEFAULT_FILE_FORMAT");
+    JalviewFileChooser chooser = JalviewFileChooser
+            .forRead(Cache.getProperty("LAST_DIRECTORY"), fileFormat);
     chooser.setFileView(new JalviewFileView());
-    chooser.setDialogTitle(MessageManager
-            .getString("label.select_startup_file"));
+    chooser.setDialogTitle(
+            MessageManager.getString("label.select_startup_file"));
 
     int value = chooser.showOpenDialog(this);
 
     if (value == JalviewFileChooser.APPROVE_OPTION)
     {
-      jalview.bin.Cache.applicationProperties.setProperty(
-              "DEFAULT_FILE_FORMAT", chooser.getSelectedFormat());
-      startupFileTextfield.setText(chooser.getSelectedFile()
-              .getAbsolutePath());
+      FileFormatI format = chooser.getSelectedFormat();
+      if (format != null)
+      {
+        Cache.setPropertyNoSave("DEFAULT_FILE_FORMAT",
+                format.getName());
+      }
+      startupFileTextfield
+              .setText(chooser.getSelectedFile().getAbsolutePath());
     }
   }
 
@@ -826,8 +1005,11 @@ public class Preferences extends GPreferences
   {
     try
     {
-      wsPrefs.updateWsMenuConfig(true);
-      wsPrefs.refreshWs_actionPerformed(e);
+      if (!Platform.isJS())
+      {
+        wsPrefs.updateWsMenuConfig(true);
+        wsPrefs.refreshWs_actionPerformed(e);
+      }
       frame.setClosed(true);
     } catch (Exception ex)
     {
@@ -846,6 +1028,7 @@ public class Preferences extends GPreferences
     conservation.setEnabled(annotations.isSelected());
     quality.setEnabled(annotations.isSelected());
     identity.setEnabled(annotations.isSelected());
+    showOccupancy.setEnabled(annotations.isSelected());
     showGroupConsensus.setEnabled(annotations.isSelected());
     showGroupConservation.setEnabled(annotations.isSelected());
     showConsensHistogram.setEnabled(annotations.isSelected()
@@ -861,15 +1044,25 @@ public class Preferences extends GPreferences
     boolean valid = false;
     while (!valid)
     {
-      if (JOptionPane.showInternalConfirmDialog(Desktop.desktop, link,
+      if (JvOptionPane.showInternalConfirmDialog(Desktop.getDesktopPane(), link,
               MessageManager.getString("label.new_sequence_url_link"),
-              JOptionPane.OK_CANCEL_OPTION, -1, null) == JOptionPane.OK_OPTION)
+              JvOptionPane.OK_CANCEL_OPTION, -1,
+              null) == JvOptionPane.OK_OPTION)
       {
         if (link.checkValid())
         {
-          ((UrlLinkTableModel) linkUrlTable.getModel()).insertRow(
-                  link.getName(), link.getURL());
-          valid = true;
+          if (((UrlLinkTableModel) linkUrlTable.getModel())
+                  .isUniqueName(link.getName()))
+          {
+            ((UrlLinkTableModel) linkUrlTable.getModel())
+                    .insertRow(link.getName(), link.getURL());
+            valid = true;
+          }
+          else
+          {
+            link.notifyDuplicate();
+            continue;
+          }
         }
       }
       else
@@ -892,21 +1085,37 @@ public class Preferences extends GPreferences
       return;
     }
 
-    link.setName(linkUrlTable.getValueAt(index, 0).toString());
-    link.setURL(linkUrlTable.getValueAt(index, 1).toString());
+    int nameCol = ((UrlLinkTableModel) linkUrlTable.getModel())
+            .getNameColumn();
+    int urlCol = ((UrlLinkTableModel) linkUrlTable.getModel())
+            .getUrlColumn();
+    String oldName = linkUrlTable.getValueAt(index, nameCol).toString();
+    link.setName(oldName);
+    link.setURL(linkUrlTable.getValueAt(index, urlCol).toString());
 
     boolean valid = false;
     while (!valid)
     {
-      if (JOptionPane.showInternalConfirmDialog(Desktop.desktop, link,
+      if (JvOptionPane.showInternalConfirmDialog(Desktop.getDesktopPane(), link,
               MessageManager.getString("label.edit_sequence_url_link"),
-              JOptionPane.OK_CANCEL_OPTION, -1, null) == JOptionPane.OK_OPTION)
+              JvOptionPane.OK_CANCEL_OPTION, -1,
+              null) == JvOptionPane.OK_OPTION)
       {
         if (link.checkValid())
         {
-          linkUrlTable.setValueAt(link.getName(), index, 0);
-          linkUrlTable.setValueAt(link.getURL(), index, 1);
-          valid = true;
+          if ((oldName.equals(link.getName()))
+                  || (((UrlLinkTableModel) linkUrlTable.getModel())
+                          .isUniqueName(link.getName())))
+          {
+            linkUrlTable.setValueAt(link.getName(), index, nameCol);
+            linkUrlTable.setValueAt(link.getURL(), index, urlCol);
+            valid = true;
+          }
+          else
+          {
+            link.notifyDuplicate();
+            continue;
+          }
         }
       }
       else
@@ -936,21 +1145,28 @@ public class Preferences extends GPreferences
     ((UrlLinkTableModel) linkUrlTable.getModel()).removeRow(modelIndex);
   }
 
-
   @Override
   public void defaultBrowser_mouseClicked(MouseEvent e)
   {
-    JFileChooser chooser = new JFileChooser(".");
-    chooser.setDialogTitle(MessageManager
-            .getString("label.select_default_browser"));
+    // TODO: JAL-3048 not needed for j2s
+    if (!Platform.isJS()) // BH 2019
+    /**
+     * Java only
+     * 
+     * @j2sIgnore
+     */
+    {
+      JFileChooser chooser = new JFileChooser(".");
+      chooser.setDialogTitle(
+              MessageManager.getString("label.select_default_browser"));
 
-    int value = chooser.showOpenDialog(this);
+      int value = chooser.showOpenDialog(this);
 
-    if (value == JFileChooser.APPROVE_OPTION)
-    {
-      defaultBrowser.setText(chooser.getSelectedFile().getAbsolutePath());
+      if (value == JFileChooser.APPROVE_OPTION)
+      {
+        defaultBrowser.setText(chooser.getSelectedFile().getAbsolutePath());
+      }
     }
-
   }
 
   /*
@@ -967,6 +1183,11 @@ public class Preferences extends GPreferences
     super.showunconserved_actionPerformed(e);
   }
 
+  /**
+   * not implemented -- returns empty list
+   * 
+   * @return
+   */
   public static List<String> getGroupURLLinks()
   {
     return groupURLLinks;
@@ -975,27 +1196,64 @@ public class Preferences extends GPreferences
   @Override
   public void minColour_actionPerformed(JPanel panel)
   {
-    Color col = JColorChooser.showDialog(this,
+    JalviewColourChooser.showColourChooser(this,
             MessageManager.getString("label.select_colour_minimum_value"),
-            minColour.getBackground());
-    if (col != null)
-    {
-      panel.setBackground(col);
-    }
-    panel.repaint();
+            panel);
   }
 
   @Override
   public void maxColour_actionPerformed(JPanel panel)
   {
-    Color col = JColorChooser.showDialog(this,
+    JalviewColourChooser.showColourChooser(this,
             MessageManager.getString("label.select_colour_maximum_value"),
-            maxColour.getBackground());
-    if (col != null)
+            panel);
+  }
+
+  @Override
+  public void gapColour_actionPerformed(JPanel gap)
+  {
+    if (!useLegacyGap.isSelected())
+    {
+      JalviewColourChooser.showColourChooser(this,
+              MessageManager.getString("label.select_gap_colour"),
+              gap);
+    }
+  }
+
+  @Override
+  public void hiddenColour_actionPerformed(JPanel hidden)
+  {
+    JalviewColourChooser.showColourChooser(this,
+            MessageManager.getString("label.select_hidden_colour"),
+            hidden);
+  }
+
+  @Override
+  protected void useLegacyGaps_actionPerformed(ActionEvent e)
+  {
+    boolean enabled = useLegacyGap.isSelected();
+    if (enabled)
     {
-      panel.setBackground(col);
+      gapColour.setBackground(
+              jalview.renderer.OverviewResColourFinder.OVERVIEW_DEFAULT_LEGACY_GAP);
     }
-    panel.repaint();
+    else
+    {
+      gapColour.setBackground(
+              jalview.renderer.OverviewResColourFinder.OVERVIEW_DEFAULT_GAP);
+    }
+    gapColour.setEnabled(!enabled);
+    gapLabel.setEnabled(!enabled);
+  }
+
+  @Override
+  protected void resetOvDefaults_actionPerformed(ActionEvent e)
+  {
+    useLegacyGap.setSelected(false);
+    useLegacyGaps_actionPerformed(null);
+    showHiddenAtStart.setSelected(false);
+    hiddenColour.setBackground(
+            jalview.renderer.OverviewResColourFinder.OVERVIEW_DEFAULT_HIDDEN);
   }
 
   @Override
@@ -1015,11 +1273,12 @@ public class Preferences extends GPreferences
       }
     } catch (NumberFormatException x)
     {
-      JOptionPane.showInternalMessageDialog(Desktop.desktop, MessageManager
-              .getString("warn.user_defined_width_requirements"),
-              MessageManager.getString("label.invalid_id_column_width"),
-              JOptionPane.WARNING_MESSAGE);
       userIdWidth.setText("");
+      JvOptionPane.showInternalMessageDialog(Desktop.getDesktopPane(),
+              MessageManager
+                      .getString("warn.user_defined_width_requirements"),
+              MessageManager.getString("label.invalid_id_column_width"),
+              JvOptionPane.WARNING_MESSAGE);
     }
   }
 
@@ -1034,17 +1293,17 @@ public class Preferences extends GPreferences
    * Returns true if chimera path is to a valid executable, else show an error
    * dialog.
    */
-  private boolean validateChimeraPath()
+  protected boolean validateChimeraPath()
   {
     if (chimeraPath.getText().trim().length() > 0)
     {
       File f = new File(chimeraPath.getText());
       if (!f.canExecute())
       {
-        JOptionPane.showInternalMessageDialog(Desktop.desktop,
+        JvOptionPane.showInternalMessageDialog(Desktop.getDesktopPane(),
                 MessageManager.getString("label.invalid_chimera_path"),
                 MessageManager.getString("label.invalid_name"),
-                JOptionPane.ERROR_MESSAGE);
+                JvOptionPane.ERROR_MESSAGE);
         return false;
       }
     }
@@ -1080,13 +1339,12 @@ public class Preferences extends GPreferences
     if (!found)
     {
       String[] options = { "OK", "Help" };
-      int showHelp = JOptionPane.showInternalOptionDialog(
-              Desktop.desktop,
+      int showHelp = JvOptionPane.showInternalOptionDialog(Desktop.getDesktopPane(),
               JvSwingUtils.wrapTooltip(true,
                       MessageManager.getString("label.chimera_missing")),
-              "", JOptionPane.YES_NO_OPTION, JOptionPane.WARNING_MESSAGE,
+              "", JvOptionPane.YES_NO_OPTION, JvOptionPane.WARNING_MESSAGE,
               null, options, options[0]);
-      if (showHelp == JOptionPane.NO_OPTION)
+      if (showHelp == JvOptionPane.NO_OPTION)
       {
         try
         {
@@ -1153,8 +1411,8 @@ public class Preferences extends GPreferences
       return name.hashCode() + code.hashCode();
     }
   }
-  
-  private class UrlListSelectionHandler implements ListSelectionListener
+
+  protected class UrlListSelectionHandler implements ListSelectionListener
   {
 
     @Override
@@ -1193,5 +1451,5 @@ public class Preferences extends GPreferences
         editLink.setEnabled(false);
       }
     }
-}
+  }
 }