JAL-1925 update source version in license
[jalview.git] / src / jalview / gui / AlignmentPanel.java
old mode 100755 (executable)
new mode 100644 (file)
index ac0862e..3031cd5
-package jalview.gui;\r
-\r
-import jalview.jbgui.GAlignmentPanel;\r
-import jalview.schemes.*;\r
-import jalview.analysis.*;\r
-import jalview.datamodel.*;\r
-import java.awt.*;\r
-import java.awt.event.*;\r
-import java.awt.print.*;\r
-import java.io.*;\r
-import java.awt.image.*;\r
-import org.jibble.epsgraphics.*;\r
-import javax.imageio.*;\r
-\r
-\r
-\r
-public class AlignmentPanel extends GAlignmentPanel implements AdjustmentListener, Printable\r
-{\r
-\r
-  AlignViewport     av;\r
-  OverviewPanel overviewPanel;\r
-  SeqPanel   seqPanel;\r
-  IdPanel    idPanel;\r
-  IdwidthAdjuster idwidthAdjuster;\r
-  SecondaryStructurePanel ssPanel;\r
-  public AlignFrame alignFrame;\r
-  ScalePanel scalePanel;\r
-  ScorePanel scorePanel;\r
-\r
-  public AlignmentPanel(AlignFrame af, final AlignViewport av)\r
-  {\r
-    alignFrame = af;\r
-    this.av         = av;\r
-    seqPanel        = new SeqPanel  (av, this);\r
-    idPanel         = new IdPanel   (av, this);\r
-\r
-    scalePanel = new ScalePanel(av, this);\r
-    scorePanel = new ScorePanel(av);\r
-    ssPanel = new SecondaryStructurePanel(av);\r
-\r
-    secondaryPanelHolder.add(ssPanel, BorderLayout.CENTER);\r
-\r
-    idPanelHolder.add(idPanel, BorderLayout.CENTER);\r
-    idwidthAdjuster = new IdwidthAdjuster(this);\r
-    idSpaceFillerPanel1.add(idwidthAdjuster, BorderLayout.CENTER);\r
-\r
-    Dimension d = calculateIdWidth();\r
-    d.setSize( d.width+4, d.height);\r
-    idPanel.idCanvas.setPreferredSize( d );\r
-    hscrollFillerPanel.setPreferredSize( d );\r
-\r
-    scalePanelHolder.add(scalePanel, BorderLayout.CENTER);\r
-    scorePanelHolder.add(scorePanel, BorderLayout.CENTER);\r
-    seqPanelHolder.add(seqPanel, BorderLayout.CENTER);\r
-    setScrollValues(0,0);\r
-\r
-    hscroll.addAdjustmentListener(this);\r
-    vscroll.addAdjustmentListener(this);\r
-\r
-    addComponentListener(new ComponentAdapter()\r
-   {\r
-     public void componentResized(ComponentEvent evt)\r
-     {\r
-       if(seqPanel.getWidth()>0 && seqPanel.getHeight()>0)\r
-          RefreshPanels();\r
-     }\r
-   });\r
-\r
-\r
-  // hscroll.setFocusable(false);\r
-  // vscroll.setFocusable(false);\r
-   setFocusable(true);\r
-\r
-   addKeyListener(new KeyAdapter()\r
-   {\r
-     public void keyPressed(KeyEvent evt)\r
-     {\r
-       switch(evt.getKeyCode())\r
-       {\r
-         case  27: // escape key\r
-           av.setSelectionGroup(null);\r
-           RefreshPanels();\r
-           break;\r
-         case KeyEvent.VK_X:\r
-           alignFrame.cut_actionPerformed(null);\r
-           break;\r
-         case KeyEvent.VK_C:\r
-           alignFrame.copy_actionPerformed(null);\r
-           break;\r
-         case KeyEvent.VK_V:\r
-           alignFrame.paste(true);\r
-           break;\r
-         case KeyEvent.VK_A:\r
-           alignFrame.selectAllSequenceMenuItem_actionPerformed(null);\r
-           break;\r
-        case KeyEvent.VK_DOWN:\r
-          alignFrame.moveSelectedSequences(false);\r
-          break;\r
-        case KeyEvent.VK_UP:\r
-          alignFrame.moveSelectedSequences(true);\r
-          break;\r
-        case KeyEvent.VK_F:\r
-          alignFrame.findMenuItem_actionPerformed(null);\r
-          break;\r
-       }\r
-     }\r
-   });\r
-  }\r
-\r
-  Dimension calculateIdWidth()\r
-  {\r
-    Graphics g = this.getGraphics();\r
-    if(g==null)\r
-    {\r
-      javax.swing.JFrame f = new javax.swing.JFrame();\r
-      f.addNotify();\r
-      g = f.getGraphics();\r
-    }\r
-\r
-    FontMetrics fm = g.getFontMetrics(av.font);\r
-    AlignmentI al = av.getAlignment();\r
-\r
-       int i   = 0;\r
-       int idWidth = 0;\r
-       String id;\r
-       while (i < al.getHeight() && al.getSequenceAt(i) != null)\r
-       {\r
-         SequenceI s   = al.getSequenceAt(i);\r
-         if(av.getShowFullId())\r
-           id   = s.getDisplayId();\r
-         else\r
-           id = s.getName();\r
-\r
-         if (fm.stringWidth(id) > idWidth)\r
-           idWidth = fm.stringWidth(id);\r
-         i++;\r
-       }\r
-\r
-       return new Dimension(idWidth, 12);\r
-  }\r
-\r
-\r
- public void highlightSearchResults(int [] results)\r
- {\r
-   seqPanel.seqCanvas.highlightSearchResults( results );\r
-\r
-   // do we need to scroll the panel?\r
-   if(results!=null && (av.getStartSeq()>results[0]\r
-                        || av.getEndSeq()<results[0]\r
-                        || av.getStartRes()>results[1]\r
-                        || av.getEndRes()<results[2]))\r
-       setScrollValues(results[1], results[0]);\r
-\r
-\r
- }\r
-\r
-\r
- public OverviewPanel getOverviewPanel()\r
- {\r
-   return overviewPanel;\r
- }\r
-\r
- public void setOverviewPanel(OverviewPanel op)\r
- {\r
-   overviewPanel = op;\r
- }\r
-\r
-\r
-  public void setGraphPanelVisible(boolean b)\r
-  {\r
-    idSpaceFillerPanel.setVisible(b);\r
-    scorePanelHolder.setVisible(b);\r
-\r
-    RefreshPanels();\r
-    // bit annoying to call this twice, can you do better?\r
-    RefreshPanels();\r
-  }\r
-\r
-  public void setSecondaryStructureVisible(boolean b)\r
-  {\r
-    secondaryPanelHolder.setVisible(b);\r
-    RefreshPanels();\r
-  }\r
-\r
-  public void setWrapAlignment(boolean wrap)\r
-  {\r
-    scorePanelHolder.setVisible(!wrap);\r
-    scalePanelHolder.setVisible(!wrap);\r
-    secondaryPanelHolder.setVisible(!wrap);\r
-\r
-    hscroll.setVisible(!wrap);\r
-\r
-    idwidthAdjuster.setVisible(!wrap);\r
-    idSpaceFillerPanel.setVisible(!wrap);\r
-    idSpaceFillerPanel1.setVisible(!wrap);\r
-\r
-    RefreshPanels();\r
-\r
-  }\r
-\r
-\r
-  public void setColourScheme()\r
-  {\r
-    ColourSchemeI cs = av.getGlobalColourScheme();\r
-\r
-    if(av.getConservationSelected())\r
-    {\r
-\r
-       Alignment al = (Alignment)av.getAlignment();\r
-       Conservation c = new Conservation("All",\r
-                            ResidueProperties.propHash, 3, al.getSequences(), 0,\r
-                            al.getWidth() );\r
-\r
-       c.calculate();\r
-       c.verdict(false, 100);\r
-       ConservationColourScheme ccs = new ConservationColourScheme(c, cs);\r
-\r
-       av.setGlobalColourScheme( ccs );\r
-\r
-    }\r
-\r
-    RefreshPanels();\r
-  }\r
-\r
-  public void RefreshPanels()\r
-  {\r
-              requestFocus();\r
-              invalidate();\r
-              idPanelHolder.setPreferredSize(idPanel.idCanvas.getPreferredSize());\r
-              if(idPanel.idCanvas.getPreferredSize()!=null)\r
-                hscrollFillerPanel.setPreferredSize(new Dimension(idPanel.idCanvas.getPreferredSize().width, 12));\r
-              idSpaceFillerPanel1.setPreferredSize(new Dimension(500,\r
-                  av.charHeight / 2 + 12));\r
-              scalePanelHolder.setPreferredSize(new Dimension(500,\r
-                  av.charHeight / 2 + 12));\r
-              if (av.getWrapAlignment())\r
-              {\r
-                int max = av.alignment.getWidth() /\r
-                    (seqPanel.seqCanvas.getWidth() / av.charWidth) + 1;\r
-\r
-                int h = (av.alignment.getHeight() + 2) * av.charHeight;\r
-                vextent = seqPanel.seqCanvas.getHeight() / h;\r
-                vscroll.setValues(0, vextent, 0, max);\r
-              }\r
-              else\r
-\r
-                setScrollValues(av.getStartRes(), av.getStartSeq());\r
-              av.getConsensus(true);\r
-              if (overviewPanel != null)\r
-                overviewPanel.updateOverviewImage();\r
-\r
-          validate();\r
-          repaint();\r
-  }\r
-  int hextent = 0;\r
-  int vextent = 0;\r
-\r
-\r
-  // return value is true if the scroll is valid\r
-  public boolean scrollUp(boolean up)\r
-  {\r
-    if(up)\r
-    {\r
-      if(vscroll.getValue()<1)\r
-        return false;\r
-      vscroll.setValue(vscroll.getValue() - 1);\r
-    }\r
-    else\r
-    {\r
-     if(vextent+vscroll.getValue() >= av.getAlignment().getHeight())\r
-       return false;\r
-      vscroll.setValue(vscroll.getValue() + 1);\r
-    }\r
-\r
-    return true;\r
-  }\r
-\r
-  public boolean scrollRight(boolean right)\r
-  {\r
-    if(right)\r
-   {\r
-     if(hscroll.getValue()<1)\r
-       return false;\r
-     hscroll.setValue(hscroll.getValue() - 1);\r
-   }\r
-   else\r
-   {\r
-    if(hextent+hscroll.getValue() >= av.getAlignment().getWidth())\r
-      return false;\r
-     hscroll.setValue(hscroll.getValue() + 1);\r
-   }\r
-\r
-   return true;\r
- }\r
-\r
-\r
-  public void setScrollValues(int x, int y)\r
-  {\r
-    hextent = seqPanel.seqCanvas.getWidth()/av.getCharWidth();\r
-    vextent = seqPanel.seqCanvas.getHeight()/av.getCharHeight();\r
-\r
-    if(hextent+x  >  av.getAlignment().getWidth())\r
-      x =  av.getAlignment().getWidth()- hextent;\r
-\r
-    if(vextent+y > av.getAlignment().getHeight())\r
-      y = av.getAlignment().getHeight() - vextent;\r
-\r
-    if(y<0)\r
-      y = 0;\r
-\r
-    if(x<0)\r
-      x=0;\r
-\r
-    hscroll.setValues(x,hextent,0,av.getAlignment().getWidth());\r
-    vscroll.setValues(y,vextent,0,av.getAlignment().getHeight() );\r
-\r
-\r
-    repaint();\r
-\r
-  }\r
-\r
-\r
-  public void adjustmentValueChanged(AdjustmentEvent evt)\r
-  {\r
-\r
-    if (evt.getSource() == hscroll)\r
-    {\r
-      int x = hscroll.getValue();\r
-      av.setStartRes(x);\r
-      av.setEndRes(x + seqPanel.seqCanvas.getWidth()/av.getCharWidth()-1);\r
-    }\r
-\r
-    if (evt.getSource() == vscroll)\r
-    {\r
-      int offy = vscroll.getValue();\r
-      if (av.getWrapAlignment())\r
-      {\r
-        av.setStartRes( vscroll.getValue() * av.getChunkWidth());\r
-      }\r
-      else\r
-      {\r
-        av.setStartSeq(offy);\r
-        av.setEndSeq(offy + seqPanel.seqCanvas.getHeight() / av.getCharHeight());\r
-      }\r
-    }\r
-\r
-\r
-    if(overviewPanel!=null)\r
-      overviewPanel.setBoxPosition();\r
-\r
-    repaint();\r
-  }\r
-\r
-  public int print(Graphics pg, PageFormat pf, int pi) throws PrinterException\r
-  {\r
-    pg.translate((int)pf.getImageableX(), (int)pf.getImageableY());\r
-\r
-    int pwidth = (int) pf.getImageableWidth();\r
-    int pheight = (int) pf.getImageableHeight();\r
-\r
-    if (av.getWrapAlignment())\r
-      return printWrappedAlignment(pg, pwidth,pheight, pi);\r
-    else\r
-      return printUnwrapped(pg,pwidth, pheight,pi);\r
-  }\r
-\r
-  public int printUnwrapped(Graphics pg, int pwidth, int pheight, int pi) throws PrinterException\r
-  {\r
-\r
-    int idWidth = calculateIdWidth().width;\r
-\r
-\r
-    pg.setColor(Color.white);\r
-    pg.fillRect(0,0,pwidth, pheight);\r
-    pg.setFont( av.getFont() );\r
-\r
-    ////////////////////////////////////\r
-    /// How many sequences and residues can we fit on a printable page?\r
-    int totalRes = (pwidth - idWidth)/av.getCharWidth();\r
-    int totalSeq = (int)((pheight - 30)/av.getCharHeight())-1;\r
-    int pagesWide = av.getAlignment().getWidth() / totalRes +1;\r
-    int pagesHigh = av.getAlignment().getHeight() / totalSeq +1;\r
-\r
-    if (pi >= pagesWide*pagesHigh)\r
-     return Printable.NO_SUCH_PAGE;\r
-\r
-    /////////////////////////////\r
-    /// Only print these sequences and residues on this page\r
-    int startRes, endRes, startSeq, endSeq;\r
-    startRes = (pi % pagesWide) * totalRes;\r
-    endRes = startRes + totalRes-1;\r
-    if(endRes>av.getAlignment().getWidth())\r
-      endRes = av.getAlignment().getWidth();\r
-\r
-     startSeq = (pi / pagesWide) * totalSeq;\r
-     endSeq = startSeq + totalSeq;\r
-     if(endSeq > av.getAlignment().getHeight())\r
-       endSeq = av.getAlignment().getHeight();\r
-\r
-\r
-    ////////////////\r
-    //draw Scale\r
-    pg.translate(30,0);\r
-    scalePanel.drawScale(pg, startRes, endRes, pwidth-idWidth);\r
-\r
-    pg.translate(-30, 30);\r
-    ////////////////\r
-    // Draw the ids\r
-    Color currentColor=null;\r
-    Color currentTextColor=null;\r
-    for(int i=startSeq; i<endSeq; i++)\r
-    {\r
-      if (av.getSelectionGroup()!=null && av.getSelectionGroup().sequences.contains(av.getAlignment().getSequenceAt(i)))\r
-      {\r
-        currentColor = Color.gray;\r
-        currentTextColor = Color.black;\r
-      }\r
-      else\r
-      {\r
-        currentColor = av.getAlignment().getSequenceAt(i).getColor();\r
-        currentTextColor = Color.black;\r
-      }\r
-\r
-      pg.setColor(currentColor);\r
-      pg.fillRect(0,  jalview.analysis.AlignmentUtil.getPixelHeight(startSeq, i, av.getCharHeight()),\r
-                              idWidth,\r
-                              av.getCharHeight());\r
-\r
-      pg.setColor(currentTextColor);\r
-\r
-      String string = av.getAlignment().getSequenceAt(i).getName();\r
-      if(av.getShowFullId())\r
-        string = av.getAlignment().getSequenceAt(i).getDisplayId();\r
-\r
-      pg.drawString(string, 0,  jalview.analysis.AlignmentUtil.getPixelHeight\r
-                    (startSeq, i, av.getCharHeight()) + av.getCharHeight() - (av.getCharHeight() / 5));\r
-    }\r
-\r
-    // draw main sequence panel\r
-    pg.translate(idWidth+4,0);\r
-    pg.setClip(0,0,pwidth-idWidth, pheight);\r
-    seqPanel.seqCanvas.drawPanel(pg,startRes,endRes,startSeq,endSeq,startRes,startSeq,0);\r
-\r
-    return Printable.PAGE_EXISTS;\r
-  }\r
-\r
-\r
-  public int printWrappedAlignment(Graphics pg, int pwidth, int pheight, int pi) throws PrinterException\r
-  {\r
-\r
-    int idWidth = calculateIdWidth().width;\r
-\r
-    if( seqPanel.seqCanvas.getWidth() < pwidth-idWidth)\r
-      pwidth = seqPanel.seqCanvas.getWidth() + idWidth;\r
-\r
-\r
-    pg.setColor(Color.white);\r
-    pg.fillRect(0,0,pwidth, pheight);\r
-    pg.setFont( av.getFont() );\r
-\r
-    ////////////////////////////////////\r
-    /// How many sequences and residues can we fit on a printable page?\r
-    AlignmentI da = av.alignment;\r
-    int endy   = da.getHeight();\r
-    int chunkHeight =  (da.getHeight() + 2)*av.charHeight;\r
-    int chunkWidth  =   (pwidth-idWidth)/av.charWidth;\r
-\r
-    int noChunksOnPage = pheight / chunkHeight;\r
-    int totalChunks = da.getWidth() / chunkWidth;\r
-\r
-    if ( pi*noChunksOnPage > totalChunks )\r
-     return Printable.NO_SUCH_PAGE;\r
-\r
-    ////////////////\r
-    // Draw the ids\r
-    pg.setClip(0,0,pwidth, noChunksOnPage*chunkHeight);\r
-\r
-    int row = pi*noChunksOnPage;\r
-    pg.setColor(Color.black);\r
-    for(int ypos=2*av.charHeight;\r
-        ypos <= pheight && row*chunkWidth<da.getWidth();\r
-        ypos += chunkHeight, row++ )\r
-    {\r
-      for (int i = 0; i < endy; i++)\r
-      {\r
-        SequenceI s = da.getSequenceAt(i);\r
-        String string = s.getName();\r
-        if (av.getShowFullId())\r
-          string = s.getDisplayId();\r
-\r
-        pg.drawString(string, 0,\r
-                      AlignmentUtil.getPixelHeight(0, i, av.charHeight) + ypos +\r
-                      av.charHeight - (av.charHeight / 5));\r
-      }\r
-    }\r
-\r
-    // draw main sequence panel\r
-    pg.translate(idWidth+4,0);\r
-    seqPanel.seqCanvas.drawWrappedPanel(pg, pwidth-idWidth, pheight, pi*noChunksOnPage*chunkWidth);\r
-\r
-\r
-    return Printable.PAGE_EXISTS;\r
-\r
-  }\r
-\r
-\r
-  public void makeEPS()\r
-  {\r
-    int height = (av.alignment.getWidth() / av.getChunkWidth() +1) * av.chunkHeight;\r
-    int width = seqPanel.getWidth() + idPanel.getWidth();\r
-\r
-    if (!av.getWrapAlignment())\r
-    {\r
-      height = (av.alignment.getHeight()+1) * av.charHeight + 30;\r
-      width = idPanel.getWidth() + av.alignment.getWidth() * av.charWidth;\r
-    }\r
-\r
-    try\r
-    {\r
-      jalview.io.JalviewFileChooser chooser = new jalview.io.JalviewFileChooser(jalview.bin.Cache.getProperty(\r
-          "LAST_DIRECTORY"), new String[]{"eps"}, "Encapsulated Postscript");\r
-      chooser.setFileView(new jalview.io.JalviewFileView());\r
-      chooser.setDialogTitle("Create EPS file from alignment");\r
-      chooser.setToolTipText("Save");\r
-\r
-      int value = chooser.showSaveDialog(this);\r
-      if (value != jalview.io.JalviewFileChooser.APPROVE_OPTION)\r
-        return;\r
-\r
-      jalview.bin.Cache.setProperty("LAST_DIRECTORY",chooser.getSelectedFile().getPath());\r
-      FileOutputStream out = new FileOutputStream(chooser.getSelectedFile());\r
-      EpsGraphics2D pg = new EpsGraphics2D("Example", out, 0, 0, width, height);\r
-\r
-        if (av.getWrapAlignment())\r
-          printWrappedAlignment(pg, width, height, 0);\r
-        else\r
-          printUnwrapped(pg, width, height, 0);\r
-\r
-\r
-        pg.flush();\r
-        pg.close();\r
-    }\r
-    catch (Exception ex)\r
-    {\r
-      ex.printStackTrace();\r
-    }\r
-  }\r
-\r
-  public void makePNG()\r
-  {\r
-      int height = (av.alignment.getWidth() / av.getChunkWidth() +1) * av.chunkHeight;\r
-      int width = seqPanel.getWidth() + idPanel.getWidth();\r
-\r
-      if (!av.getWrapAlignment())\r
-      {\r
-        height = (av.alignment.getHeight()+1) * av.charHeight + 30;\r
-        width = idPanel.getWidth() + av.alignment.getWidth() * av.charWidth;\r
-      }\r
-\r
-\r
-\r
-    try\r
-    {\r
-      jalview.io.JalviewFileChooser chooser = new jalview.io.JalviewFileChooser(jalview.bin.Cache.getProperty(\r
-          "LAST_DIRECTORY"), new String[]{"png"}, "Portable network graphics");\r
-      chooser.setFileView(new jalview.io.JalviewFileView());\r
-      chooser.setDialogTitle("Create EPS file from alignment");\r
-      chooser.setToolTipText("Save");\r
-\r
-      int value = chooser.showSaveDialog(this);\r
-      if (value != jalview.io.JalviewFileChooser.APPROVE_OPTION)\r
-        return;\r
-\r
-      jalview.bin.Cache.setProperty("LAST_DIRECTORY",chooser.getSelectedFile().getPath());\r
-      FileOutputStream out = new FileOutputStream(chooser.getSelectedFile());\r
-\r
-      BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);\r
-      Graphics png = bi.getGraphics();\r
-\r
-\r
-        if (av.getWrapAlignment())\r
-          printWrappedAlignment(png, width, height, 0);\r
-        else\r
-          printUnwrapped(png, width, height, 0);\r
-\r
-        ImageIO.write(bi, "png", out);\r
-        out.close();\r
-    }\r
-    catch (Exception ex)\r
-    {\r
-      ex.printStackTrace();\r
-    }\r
-  }\r
-\r
-}\r
-\r
-\r
-\r
-\r
+/*
+ * Jalview - A Sequence Alignment Editor and Viewer (Version 2.9.0b2)
+ * Copyright (C) 2015 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.
+ *  
+ * 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 Jalview.  If not, see <http://www.gnu.org/licenses/>.
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
+ */
+package jalview.gui;
+
+import jalview.analysis.AnnotationSorter;
+import jalview.api.AlignViewportI;
+import jalview.api.AlignmentViewPanel;
+import jalview.bin.Cache;
+import jalview.datamodel.AlignmentI;
+import jalview.datamodel.SearchResults;
+import jalview.datamodel.SequenceFeature;
+import jalview.datamodel.SequenceGroup;
+import jalview.datamodel.SequenceI;
+import jalview.jbgui.GAlignmentPanel;
+import jalview.math.AlignmentDimension;
+import jalview.schemes.ResidueProperties;
+import jalview.structure.StructureSelectionManager;
+import jalview.util.MessageManager;
+import jalview.util.Platform;
+
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.awt.Container;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Graphics;
+import java.awt.Insets;
+import java.awt.event.AdjustmentEvent;
+import java.awt.event.AdjustmentListener;
+import java.awt.print.PageFormat;
+import java.awt.print.Printable;
+import java.awt.print.PrinterException;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.PrintWriter;
+import java.util.List;
+
+import javax.swing.SwingUtilities;
+
+/**
+ * DOCUMENT ME!
+ * 
+ * @author $author$
+ * @version $Revision: 1.161 $
+ */
+public class AlignmentPanel extends GAlignmentPanel implements
+        AdjustmentListener, Printable, AlignmentViewPanel
+{
+  public AlignViewport av;
+
+  OverviewPanel overviewPanel;
+
+  private SeqPanel seqPanel;
+
+  private IdPanel idPanel;
+
+  private boolean headless;
+
+  IdwidthAdjuster idwidthAdjuster;
+
+  /** DOCUMENT ME!! */
+  public AlignFrame alignFrame;
+
+  private ScalePanel scalePanel;
+
+  private AnnotationPanel annotationPanel;
+
+  private AnnotationLabels alabels;
+
+  // this value is set false when selection area being dragged
+  boolean fastPaint = true;
+
+  int hextent = 0;
+
+  int vextent = 0;
+
+  /*
+   * Flag set while scrolling to follow complementary cDNA/protein scroll. When
+   * true, suppresses invoking the same method recursively.
+   */
+  private boolean dontScrollComplement;
+
+  /**
+   * Creates a new AlignmentPanel object.
+   * 
+   * @param af
+   * @param av
+   */
+  public AlignmentPanel(AlignFrame af, final AlignViewport av)
+  {
+    alignFrame = af;
+    this.av = av;
+    setSeqPanel(new SeqPanel(av, this));
+    setIdPanel(new IdPanel(av, this));
+
+    setScalePanel(new ScalePanel(av, this));
+
+    idPanelHolder.add(getIdPanel(), BorderLayout.CENTER);
+    idwidthAdjuster = new IdwidthAdjuster(this);
+    idSpaceFillerPanel1.add(idwidthAdjuster, BorderLayout.CENTER);
+
+    setAnnotationPanel(new AnnotationPanel(this));
+    setAlabels(new AnnotationLabels(this));
+
+    annotationScroller.setViewportView(getAnnotationPanel());
+    annotationSpaceFillerHolder.add(getAlabels(), BorderLayout.CENTER);
+
+    scalePanelHolder.add(getScalePanel(), BorderLayout.CENTER);
+    seqPanelHolder.add(getSeqPanel(), BorderLayout.CENTER);
+
+    setScrollValues(0, 0);
+
+    hscroll.addAdjustmentListener(this);
+    vscroll.addAdjustmentListener(this);
+
+    final AlignmentPanel ap = this;
+    av.addPropertyChangeListener(new PropertyChangeListener()
+    {
+      public void propertyChange(PropertyChangeEvent evt)
+      {
+        if (evt.getPropertyName().equals("alignment"))
+        {
+          PaintRefresher.Refresh(ap, av.getSequenceSetId(), true, true);
+          alignmentChanged();
+        }
+      }
+    });
+    fontChanged();
+    adjustAnnotationHeight();
+    updateLayout();
+  }
+
+  @Override
+  public AlignViewportI getAlignViewport()
+  {
+    return av;
+  }
+
+  public void alignmentChanged()
+  {
+    av.alignmentChanged(this);
+
+    alignFrame.updateEditMenuBar();
+
+    paintAlignment(true);
+
+  }
+
+  /**
+   * DOCUMENT ME!
+   */
+  public void fontChanged()
+  {
+    // set idCanvas bufferedImage to null
+    // to prevent drawing old image
+    FontMetrics fm = getFontMetrics(av.getFont());
+
+    scalePanelHolder.setPreferredSize(new Dimension(10, av.getCharHeight()
+            + fm.getDescent()));
+    idSpaceFillerPanel1.setPreferredSize(new Dimension(10, av
+            .getCharHeight() + fm.getDescent()));
+
+    getIdPanel().getIdCanvas().gg = null;
+    getSeqPanel().seqCanvas.img = null;
+    getAnnotationPanel().adjustPanelHeight();
+
+    Dimension d = calculateIdWidth();
+
+    d.setSize(d.width + 4, d.height);
+    getIdPanel().getIdCanvas().setPreferredSize(d);
+    hscrollFillerPanel.setPreferredSize(d);
+
+    if (overviewPanel != null)
+    {
+      overviewPanel.setBoxPosition();
+    }
+    if (this.alignFrame.getSplitViewContainer() != null)
+    {
+      ((SplitFrame) this.alignFrame.getSplitViewContainer()).adjustLayout();
+    }
+
+    repaint();
+  }
+
+  /**
+   * Calculate the width of the alignment labels based on the displayed names
+   * and any bounds on label width set in preferences.
+   * 
+   * @return Dimension giving the maximum width of the alignment label panel
+   *         that should be used.
+   */
+  public Dimension calculateIdWidth()
+  {
+    // calculate sensible default width when no preference is available
+    Dimension r = null;
+    if (av.getIdWidth() < 0)
+    {
+      int afwidth = (alignFrame != null ? alignFrame.getWidth() : 300);
+      int maxwidth = Math.max(20, Math.min(afwidth - 200, 2 * afwidth / 3));
+      r = calculateIdWidth(maxwidth);
+      av.setIdWidth(r.width);
+    }
+    else
+    {
+      r = new Dimension();
+      r.width = av.getIdWidth();
+      r.height = 0;
+    }
+    return r;
+  }
+
+  /**
+   * Calculate the width of the alignment labels based on the displayed names
+   * and any bounds on label width set in preferences.
+   * 
+   * @param maxwidth
+   *          -1 or maximum width allowed for IdWidth
+   * @return Dimension giving the maximum width of the alignment label panel
+   *         that should be used.
+   */
+  public Dimension calculateIdWidth(int maxwidth)
+  {
+    Container c = new Container();
+
+    FontMetrics fm = c.getFontMetrics(new Font(av.font.getName(),
+            Font.ITALIC, av.font.getSize()));
+
+    AlignmentI al = av.getAlignment();
+    int i = 0;
+    int idWidth = 0;
+    String id;
+
+    while ((i < al.getHeight()) && (al.getSequenceAt(i) != null))
+    {
+      SequenceI s = al.getSequenceAt(i);
+
+      id = s.getDisplayId(av.getShowJVSuffix());
+
+      if (fm.stringWidth(id) > idWidth)
+      {
+        idWidth = fm.stringWidth(id);
+      }
+
+      i++;
+    }
+
+    // Also check annotation label widths
+    i = 0;
+
+    if (al.getAlignmentAnnotation() != null)
+    {
+      fm = c.getFontMetrics(getAlabels().getFont());
+
+      while (i < al.getAlignmentAnnotation().length)
+      {
+        String label = al.getAlignmentAnnotation()[i].label;
+
+        if (fm.stringWidth(label) > idWidth)
+        {
+          idWidth = fm.stringWidth(label);
+        }
+
+        i++;
+      }
+    }
+
+    return new Dimension(maxwidth < 0 ? idWidth : Math.min(maxwidth,
+            idWidth), 12);
+  }
+
+  /**
+   * Highlight the given results on the alignment.
+   * 
+   */
+  public void highlightSearchResults(SearchResults results)
+  {
+    scrollToPosition(results);
+    getSeqPanel().seqCanvas.highlightSearchResults(results);
+  }
+
+  /**
+   * Scroll the view to show the position of the highlighted region in results
+   * (if any) and redraw the overview
+   * 
+   * @param results
+   */
+  public boolean scrollToPosition(SearchResults results)
+  {
+    return scrollToPosition(results, 0, true, false);
+  }
+
+  /**
+   * Scroll the view to show the position of the highlighted region in results
+   * (if any)
+   * 
+   * @param searchResults
+   * @param redrawOverview
+   * @return
+   */
+  public boolean scrollToPosition(SearchResults searchResults,
+          boolean redrawOverview)
+  {
+    return scrollToPosition(searchResults, 0, redrawOverview, false);
+  }
+
+  /**
+   * Scroll the view to show the position of the highlighted region in results
+   * (if any)
+   * 
+   * @param results
+   * @param verticalOffset
+   *          if greater than zero, allows scrolling to a position below the
+   *          first displayed sequence
+   * @param redrawOverview
+   *          - when set, the overview will be recalculated (takes longer)
+   * @param centre
+   *          if true, try to centre the search results horizontally in the view
+   * @return false if results were not found
+   */
+  public boolean scrollToPosition(SearchResults results,
+          int verticalOffset, boolean redrawOverview, boolean centre)
+  {
+    int startv, endv, starts, ends;
+    // TODO: properly locate search results in view when large numbers of hidden
+    // columns exist before highlighted region
+    // do we need to scroll the panel?
+    // TODO: tons of nullpointerexceptions raised here.
+    if (results != null && results.getSize() > 0 && av != null
+            && av.getAlignment() != null)
+    {
+      int seqIndex = av.getAlignment().findIndex(results);
+      if (seqIndex == -1)
+      {
+        return false;
+      }
+      SequenceI seq = av.getAlignment().getSequenceAt(seqIndex);
+
+      int[] r = results.getResults(seq, 0, av.getAlignment().getWidth());
+      if (r == null)
+      {
+        return false;
+      }
+      int start = r[0];
+      int end = r[1];
+      // DEBUG
+      // System.err.println(this.av.viewName + " Seq : " + seqIndex
+      // + " Scroll to " + start + "," + end);
+
+      /*
+       * To centre results, scroll to positions half the visible width
+       * left/right of the start/end positions
+       */
+      if (centre)
+      {
+        int offset = (av.getEndRes() - av.getStartRes() + 1) / 2 - 1;
+        start = Math.max(start - offset, 0);
+        end = end + offset - 1;
+      }
+      if (start < 0)
+      {
+        return false;
+      }
+      if (end == seq.getEnd())
+      {
+        return false;
+      }
+      if (av.hasHiddenColumns())
+      {
+        start = av.getColumnSelection().findColumnPosition(start);
+        end = av.getColumnSelection().findColumnPosition(end);
+        if (start == end)
+        {
+          if (!av.getColumnSelection().isVisible(r[0]))
+          {
+            // don't scroll - position isn't visible
+            return false;
+          }
+        }
+      }
+
+      /*
+       * allow for offset of target sequence (actually scroll to one above it)
+       */
+      seqIndex = Math.max(0, seqIndex - verticalOffset);
+
+      // System.out.println("start=" + start + ", end=" + end + ", startv="
+      // + av.getStartRes() + ", endv=" + av.getEndRes() + ", starts="
+      // + av.getStartSeq() + ", ends=" + av.getEndSeq());
+      if (!av.getWrapAlignment())
+      {
+        if ((startv = av.getStartRes()) >= start)
+        {
+          /*
+           * Scroll left to make start of search results visible
+           */
+          // setScrollValues(start - 1, seqIndex); // plus one residue
+          setScrollValues(start, seqIndex);
+        }
+        else if ((endv = av.getEndRes()) <= end)
+        {
+          /*
+           * Scroll right to make end of search results visible
+           */
+          // setScrollValues(startv + 1 + end - endv, seqIndex); // plus one
+          setScrollValues(startv + end - endv, seqIndex);
+        }
+        else if ((starts = av.getStartSeq()) > seqIndex)
+        {
+          /*
+           * Scroll up to make start of search results visible
+           */
+          setScrollValues(av.getStartRes(), seqIndex);
+        }
+        else if ((ends = av.getEndSeq()) <= seqIndex)
+        {
+          /*
+           * Scroll down to make end of search results visible
+           */
+          setScrollValues(av.getStartRes(), starts + seqIndex - ends + 1);
+        }
+        /*
+         * Else results are already visible - no need to scroll
+         */
+      }
+      else
+      {
+        scrollToWrappedVisible(start);
+      }
+    }
+    if (redrawOverview && overviewPanel != null)
+    {
+      overviewPanel.setBoxPosition();
+    }
+    paintAlignment(redrawOverview);
+    return true;
+  }
+
+  void scrollToWrappedVisible(int res)
+  {
+    int cwidth = getSeqPanel().seqCanvas
+            .getWrappedCanvasWidth(getSeqPanel().seqCanvas.getWidth());
+    if (res < av.getStartRes() || res >= (av.getStartRes() + cwidth))
+    {
+      vscroll.setValue((res / cwidth));
+      av.startRes = vscroll.getValue() * cwidth;
+    }
+
+  }
+
+  /**
+   * DOCUMENT ME!
+   * 
+   * @return DOCUMENT ME!
+   */
+  public OverviewPanel getOverviewPanel()
+  {
+    return overviewPanel;
+  }
+
+  /**
+   * DOCUMENT ME!
+   * 
+   * @param op
+   *          DOCUMENT ME!
+   */
+  public void setOverviewPanel(OverviewPanel op)
+  {
+    overviewPanel = op;
+  }
+
+  /**
+   * 
+   * @param b
+   *          Hide or show annotation panel
+   * 
+   */
+  public void setAnnotationVisible(boolean b)
+  {
+    if (!av.getWrapAlignment())
+    {
+      annotationSpaceFillerHolder.setVisible(b);
+      annotationScroller.setVisible(b);
+    }
+    repaint();
+  }
+
+  /**
+   * automatically adjust annotation panel height for new annotation whilst
+   * ensuring the alignment is still visible.
+   */
+  public void adjustAnnotationHeight()
+  {
+    // TODO: display vertical annotation scrollbar if necessary
+    // this is called after loading new annotation onto alignment
+    if (alignFrame.getHeight() == 0)
+    {
+      System.out.println("NEEDS FIXING");
+    }
+    validateAnnotationDimensions(true);
+    addNotify();
+    paintAlignment(true);
+  }
+
+  /**
+   * calculate the annotation dimensions and refresh slider values accordingly.
+   * need to do repaints/notifys afterwards.
+   */
+  protected void validateAnnotationDimensions(boolean adjustPanelHeight)
+  {
+    int annotationHeight = getAnnotationPanel().adjustPanelHeight();
+
+    if (adjustPanelHeight)
+    {
+      int rowHeight = av.getCharHeight();
+      int alignmentHeight = rowHeight * av.getAlignment().getHeight();
+
+      /*
+       * Estimate available height in the AlignFrame for alignment +
+       * annotations. Deduct an estimate for title bar, menu bar, scale panel,
+       * hscroll, status bar (as these are not laid out we can't inspect their
+       * actual heights). Insets gives frame borders.
+       */
+      int stuff = Platform.isAMac() ? 80 : 100;
+      Insets insets = alignFrame.getInsets();
+      int availableHeight = alignFrame.getHeight() - stuff - insets.top
+              - insets.bottom;
+
+      /*
+       * If not enough vertical space, maximize annotation height while keeping
+       * at least two rows of alignment visible
+       */
+      if (annotationHeight + alignmentHeight > availableHeight)
+      {
+        annotationHeight = Math.min(annotationHeight, availableHeight - 2
+                * rowHeight);
+      }
+    }
+    else
+    {
+      // maintain same window layout whilst updating sliders
+      annotationHeight = annotationScroller.getSize().height;
+    }
+    hscroll.addNotify();
+
+    annotationScroller.setPreferredSize(new Dimension(annotationScroller
+            .getWidth(), annotationHeight));
+
+    Dimension e = idPanel.getSize();
+    alabels.setSize(new Dimension(e.width, annotationHeight));
+
+    annotationSpaceFillerHolder.setPreferredSize(new Dimension(
+            annotationSpaceFillerHolder.getWidth(), annotationHeight));
+    annotationScroller.validate();
+    annotationScroller.addNotify();
+  }
+
+  /**
+   * update alignment layout for viewport settings
+   * 
+   * @param wrap
+   *          DOCUMENT ME!
+   */
+  public void updateLayout()
+  {
+    fontChanged();
+    setAnnotationVisible(av.isShowAnnotation());
+    boolean wrap = av.getWrapAlignment();
+    av.startSeq = 0;
+    scalePanelHolder.setVisible(!wrap);
+    hscroll.setVisible(!wrap);
+    idwidthAdjuster.setVisible(!wrap);
+
+    if (wrap)
+    {
+      annotationScroller.setVisible(false);
+      annotationSpaceFillerHolder.setVisible(false);
+    }
+    else if (av.isShowAnnotation())
+    {
+      annotationScroller.setVisible(true);
+      annotationSpaceFillerHolder.setVisible(true);
+    }
+
+    idSpaceFillerPanel1.setVisible(!wrap);
+
+    repaint();
+  }
+
+  // return value is true if the scroll is valid
+  public boolean scrollUp(boolean up)
+  {
+    if (up)
+    {
+      if (vscroll.getValue() < 1)
+      {
+        return false;
+      }
+
+      fastPaint = false;
+      vscroll.setValue(vscroll.getValue() - 1);
+    }
+    else
+    {
+      if ((vextent + vscroll.getValue()) >= av.getAlignment().getHeight())
+      {
+        return false;
+      }
+
+      fastPaint = false;
+      vscroll.setValue(vscroll.getValue() + 1);
+    }
+
+    fastPaint = true;
+
+    return true;
+  }
+
+  /**
+   * DOCUMENT ME!
+   * 
+   * @param right
+   *          DOCUMENT ME!
+   * 
+   * @return DOCUMENT ME!
+   */
+  public boolean scrollRight(boolean right)
+  {
+    if (!right)
+    {
+      if (hscroll.getValue() < 1)
+      {
+        return false;
+      }
+
+      fastPaint = false;
+      hscroll.setValue(hscroll.getValue() - 1);
+    }
+    else
+    {
+      if ((hextent + hscroll.getValue()) >= av.getAlignment().getWidth())
+      {
+        return false;
+      }
+
+      fastPaint = false;
+      hscroll.setValue(hscroll.getValue() + 1);
+    }
+
+    fastPaint = true;
+
+    return true;
+  }
+
+  /**
+   * Adjust row/column scrollers to show a visible position in the alignment.
+   * 
+   * @param x
+   *          visible column to scroll to
+   * @param y
+   *          visible row to scroll to
+   * 
+   */
+  public void setScrollValues(int x, int y)
+  {
+    // System.err.println("Scroll " + this.av.viewName + " to " + x + "," + y);
+    if (av == null || av.getAlignment() == null)
+    {
+      return;
+    }
+    int width = av.getAlignment().getWidth();
+    int height = av.getAlignment().getHeight();
+
+    if (av.hasHiddenColumns())
+    {
+      width = av.getColumnSelection().findColumnPosition(width);
+    }
+
+    av.setEndRes((x + (getSeqPanel().seqCanvas.getWidth() / av
+            .getCharWidth())) - 1);
+
+    hextent = getSeqPanel().seqCanvas.getWidth() / av.getCharWidth();
+    vextent = getSeqPanel().seqCanvas.getHeight() / av.getCharHeight();
+
+    if (hextent > width)
+    {
+      hextent = width;
+    }
+
+    if (vextent > height)
+    {
+      vextent = height;
+    }
+
+    if ((hextent + x) > width)
+    {
+      x = width - hextent;
+    }
+
+    if ((vextent + y) > height)
+    {
+      y = height - vextent;
+    }
+
+    if (y < 0)
+    {
+      y = 0;
+    }
+
+    if (x < 0)
+    {
+      x = 0;
+    }
+
+    /*
+     * each scroll adjustment triggers adjustmentValueChanged, which resets the
+     * 'do not scroll complement' flag; ensure it is the same for both
+     * operations
+     */
+    boolean flag = isDontScrollComplement();
+    hscroll.setValues(x, hextent, 0, width);
+    setDontScrollComplement(flag);
+    vscroll.setValues(y, vextent, 0, height);
+  }
+
+  /**
+   * DOCUMENT ME!
+   * 
+   * @param evt
+   *          DOCUMENT ME!
+   */
+  public void adjustmentValueChanged(AdjustmentEvent evt)
+  {
+    int oldX = av.getStartRes();
+    int oldY = av.getStartSeq();
+
+    if (evt.getSource() == hscroll)
+    {
+      int x = hscroll.getValue();
+      av.setStartRes(x);
+      av.setEndRes((x + (getSeqPanel().seqCanvas.getWidth() / av
+              .getCharWidth())) - 1);
+    }
+
+    if (evt.getSource() == vscroll)
+    {
+      int offy = vscroll.getValue();
+
+      if (av.getWrapAlignment())
+      {
+        if (offy > -1)
+        {
+          int rowSize = getSeqPanel().seqCanvas
+                  .getWrappedCanvasWidth(getSeqPanel().seqCanvas.getWidth());
+          av.setStartRes(offy * rowSize);
+          av.setEndRes((offy + 1) * rowSize);
+        }
+        else
+        {
+          // This is only called if file loaded is a jar file that
+          // was wrapped when saved and user has wrap alignment true
+          // as preference setting
+          SwingUtilities.invokeLater(new Runnable()
+          {
+            public void run()
+            {
+              setScrollValues(av.getStartRes(), av.getStartSeq());
+            }
+          });
+        }
+      }
+      else
+      {
+        av.setStartSeq(offy);
+        av.setEndSeq(offy
+                + (getSeqPanel().seqCanvas.getHeight() / av.getCharHeight()));
+      }
+    }
+
+    if (overviewPanel != null)
+    {
+      overviewPanel.setBoxPosition();
+    }
+
+    int scrollX = av.startRes - oldX;
+    int scrollY = av.startSeq - oldY;
+
+    if (av.getWrapAlignment() || !fastPaint)
+    {
+      repaint();
+    }
+    else
+    {
+      // Make sure we're not trying to draw a panel
+      // larger than the visible window
+      if (scrollX > av.endRes - av.startRes)
+      {
+        scrollX = av.endRes - av.startRes;
+      }
+      else if (scrollX < av.startRes - av.endRes)
+      {
+        scrollX = av.startRes - av.endRes;
+      }
+
+      if (scrollX != 0 || scrollY != 0)
+      {
+        getIdPanel().getIdCanvas().fastPaint(scrollY);
+        getSeqPanel().seqCanvas.fastPaint(scrollX, scrollY);
+        getScalePanel().repaint();
+
+        if (av.isShowAnnotation() && scrollX != 0)
+        {
+          getAnnotationPanel().fastPaint(scrollX);
+        }
+      }
+    }
+    /*
+     * If there is one, scroll the (Protein/cDNA) complementary alignment to
+     * match, unless we are ourselves doing that.
+     */
+    if (isDontScrollComplement())
+    {
+      setDontScrollComplement(false);
+    }
+    else
+    {
+      av.scrollComplementaryAlignment();
+    }
+  }
+
+  /**
+   * Repaint the alignment including the annotations and overview panels (if
+   * shown).
+   */
+  public void paintAlignment(boolean updateOverview)
+  {
+    final AnnotationSorter sorter = new AnnotationSorter(getAlignment(),
+            av.isShowAutocalculatedAbove());
+    sorter.sort(getAlignment().getAlignmentAnnotation(),
+            av.getSortAnnotationsBy());
+    repaint();
+
+    if (updateOverview)
+    {
+      // TODO: determine if this paintAlignment changed structure colours
+      av.getStructureSelectionManager().sequenceColoursChanged(this);
+
+      if (overviewPanel != null)
+      {
+        overviewPanel.updateOverviewImage();
+      }
+    }
+  }
+
+  /**
+   * DOCUMENT ME!
+   * 
+   * @param g
+   *          DOCUMENT ME!
+   */
+  public void paintComponent(Graphics g)
+  {
+    invalidate();
+
+    Dimension d = getIdPanel().getIdCanvas().getPreferredSize();
+    idPanelHolder.setPreferredSize(d);
+    hscrollFillerPanel.setPreferredSize(new Dimension(d.width, 12));
+    validate();
+
+    /*
+     * set scroll bar positions; first suppress this being 'followed' in any
+     * complementary split pane
+     */
+    setDontScrollComplement(true);
+
+    if (av.getWrapAlignment())
+    {
+      int maxwidth = av.getAlignment().getWidth();
+
+      if (av.hasHiddenColumns())
+      {
+        maxwidth = av.getColumnSelection().findColumnPosition(maxwidth) - 1;
+      }
+
+      int canvasWidth = getSeqPanel().seqCanvas
+              .getWrappedCanvasWidth(getSeqPanel().seqCanvas.getWidth());
+      if (canvasWidth > 0)
+      {
+        int max = maxwidth
+                / getSeqPanel().seqCanvas
+                        .getWrappedCanvasWidth(getSeqPanel().seqCanvas
+                                .getWidth()) + 1;
+        vscroll.setMaximum(max);
+        vscroll.setUnitIncrement(1);
+        vscroll.setVisibleAmount(1);
+      }
+    }
+    else
+    {
+      setScrollValues(av.getStartRes(), av.getStartSeq());
+    }
+  }
+
+  /**
+   * DOCUMENT ME!
+   * 
+   * @param pg
+   *          DOCUMENT ME!
+   * @param pf
+   *          DOCUMENT ME!
+   * @param pi
+   *          DOCUMENT ME!
+   * 
+   * @return DOCUMENT ME!
+   * 
+   * @throws PrinterException
+   *           DOCUMENT ME!
+   */
+  public int print(Graphics pg, PageFormat pf, int pi)
+          throws PrinterException
+  {
+    pg.translate((int) pf.getImageableX(), (int) pf.getImageableY());
+
+    int pwidth = (int) pf.getImageableWidth();
+    int pheight = (int) pf.getImageableHeight();
+
+    if (av.getWrapAlignment())
+    {
+      return printWrappedAlignment(pg, pwidth, pheight, pi);
+    }
+    else
+    {
+      return printUnwrapped(pg, pwidth, pheight, pi);
+    }
+  }
+
+  /**
+   * DOCUMENT ME!
+   * 
+   * @param pg
+   *          DOCUMENT ME!
+   * @param pwidth
+   *          DOCUMENT ME!
+   * @param pheight
+   *          DOCUMENT ME!
+   * @param pi
+   *          DOCUMENT ME!
+   * 
+   * @return DOCUMENT ME!
+   * 
+   * @throws PrinterException
+   *           DOCUMENT ME!
+   */
+  public int printUnwrapped(Graphics pg, int pwidth, int pheight, int pi)
+          throws PrinterException
+  {
+    int idWidth = getVisibleIdWidth(false);
+    FontMetrics fm = getFontMetrics(av.getFont());
+    int scaleHeight = av.getCharHeight() + fm.getDescent();
+
+    pg.setColor(Color.white);
+    pg.fillRect(0, 0, pwidth, pheight);
+    pg.setFont(av.getFont());
+
+    // //////////////////////////////////
+    // / How many sequences and residues can we fit on a printable page?
+    int totalRes = (pwidth - idWidth) / av.getCharWidth();
+
+    int totalSeq = (pheight - scaleHeight) / av.getCharHeight() - 1;
+
+    int pagesWide = (av.getAlignment().getWidth() / totalRes) + 1;
+
+    // ///////////////////////////
+    // / Only print these sequences and residues on this page
+    int startRes;
+
+    // ///////////////////////////
+    // / Only print these sequences and residues on this page
+    int endRes;
+
+    // ///////////////////////////
+    // / Only print these sequences and residues on this page
+    int startSeq;
+
+    // ///////////////////////////
+    // / Only print these sequences and residues on this page
+    int endSeq;
+    startRes = (pi % pagesWide) * totalRes;
+    endRes = (startRes + totalRes) - 1;
+
+    if (endRes > (av.getAlignment().getWidth() - 1))
+    {
+      endRes = av.getAlignment().getWidth() - 1;
+    }
+
+    startSeq = (pi / pagesWide) * totalSeq;
+    endSeq = startSeq + totalSeq;
+
+    if (endSeq > av.getAlignment().getHeight())
+    {
+      endSeq = av.getAlignment().getHeight();
+    }
+
+    int pagesHigh = ((av.getAlignment().getHeight() / totalSeq) + 1)
+            * pheight;
+
+    if (av.isShowAnnotation())
+    {
+      pagesHigh += getAnnotationPanel().adjustPanelHeight() + 3;
+    }
+
+    pagesHigh /= pheight;
+
+    if (pi >= (pagesWide * pagesHigh))
+    {
+      return Printable.NO_SUCH_PAGE;
+    }
+
+    // draw Scale
+    pg.translate(idWidth, 0);
+    getScalePanel().drawScale(pg, startRes, endRes, pwidth - idWidth,
+            scaleHeight);
+    pg.translate(-idWidth, scaleHeight);
+
+    // //////////////
+    // Draw the ids
+    Color currentColor = null;
+    Color currentTextColor = null;
+
+    pg.setFont(getIdPanel().getIdCanvas().getIdfont());
+
+    SequenceI seq;
+    for (int i = startSeq; i < endSeq; i++)
+    {
+      seq = av.getAlignment().getSequenceAt(i);
+      if ((av.getSelectionGroup() != null)
+              && av.getSelectionGroup().getSequences(null).contains(seq))
+      {
+        currentColor = Color.gray;
+        currentTextColor = Color.black;
+      }
+      else
+      {
+        currentColor = av.getSequenceColour(seq);
+        currentTextColor = Color.black;
+      }
+
+      pg.setColor(currentColor);
+      pg.fillRect(0, (i - startSeq) * av.getCharHeight(), idWidth,
+              av.getCharHeight());
+
+      pg.setColor(currentTextColor);
+
+      int xPos = 0;
+      if (av.isRightAlignIds())
+      {
+        fm = pg.getFontMetrics();
+        xPos = idWidth
+                - fm.stringWidth(seq.getDisplayId(av.getShowJVSuffix()))
+                - 4;
+      }
+
+      pg.drawString(seq.getDisplayId(av.getShowJVSuffix()), xPos,
+              (((i - startSeq) * av.getCharHeight()) + av.getCharHeight())
+                      - (av.getCharHeight() / 5));
+    }
+
+    pg.setFont(av.getFont());
+
+    // draw main sequence panel
+    pg.translate(idWidth, 0);
+    getSeqPanel().seqCanvas.drawPanel(pg, startRes, endRes, startSeq,
+            endSeq, 0);
+
+    if (av.isShowAnnotation() && (endSeq == av.getAlignment().getHeight()))
+    {
+      // draw annotation - need to offset for current scroll position
+      int offset = -getAlabels().getScrollOffset();
+      pg.translate(0, offset);
+      pg.translate(-idWidth - 3, (endSeq - startSeq) * av.getCharHeight()
+              + 3);
+      getAlabels().drawComponent(pg, idWidth);
+      pg.translate(idWidth + 3, 0);
+      getAnnotationPanel().renderer.drawComponent(getAnnotationPanel(), av,
+              pg, -1, startRes, endRes + 1);
+      pg.translate(0, -offset);
+    }
+
+    return Printable.PAGE_EXISTS;
+  }
+
+  /**
+   * DOCUMENT ME!
+   * 
+   * @param pg
+   *          DOCUMENT ME!
+   * @param pwidth
+   *          DOCUMENT ME!
+   * @param pheight
+   *          DOCUMENT ME!
+   * @param pi
+   *          DOCUMENT ME!
+   * 
+   * @return DOCUMENT ME!
+   * 
+   * @throws PrinterException
+   *           DOCUMENT ME!
+   */
+  public int printWrappedAlignment(Graphics pg, int pwidth, int pheight,
+          int pi) throws PrinterException
+  {
+    int annotationHeight = 0;
+    AnnotationLabels labels = null;
+    if (av.isShowAnnotation())
+    {
+      annotationHeight = getAnnotationPanel().adjustPanelHeight();
+      labels = new AnnotationLabels(av);
+    }
+
+    int hgap = av.getCharHeight();
+    if (av.getScaleAboveWrapped())
+    {
+      hgap += av.getCharHeight();
+    }
+
+    int cHeight = av.getAlignment().getHeight() * av.getCharHeight() + hgap
+            + annotationHeight;
+
+    int idWidth = getVisibleIdWidth(false);
+
+    int maxwidth = av.getAlignment().getWidth();
+    if (av.hasHiddenColumns())
+    {
+      maxwidth = av.getColumnSelection().findColumnPosition(maxwidth) - 1;
+    }
+
+    int resWidth = getSeqPanel().seqCanvas.getWrappedCanvasWidth(pwidth
+            - idWidth);
+
+    int totalHeight = cHeight * (maxwidth / resWidth + 1);
+
+    pg.setColor(Color.white);
+    pg.fillRect(0, 0, pwidth, pheight);
+    pg.setFont(av.getFont());
+
+    // //////////////
+    // Draw the ids
+    pg.setColor(Color.black);
+
+    pg.translate(0, -pi * pheight);
+
+    pg.setClip(0, pi * pheight, pwidth, pheight);
+
+    int ypos = hgap;
+
+    do
+    {
+      for (int i = 0; i < av.getAlignment().getHeight(); i++)
+      {
+        pg.setFont(getIdPanel().getIdCanvas().getIdfont());
+        SequenceI s = av.getAlignment().getSequenceAt(i);
+        String string = s.getDisplayId(av.getShowJVSuffix());
+        int xPos = 0;
+        if (av.isRightAlignIds())
+        {
+          FontMetrics fm = pg.getFontMetrics();
+          xPos = idWidth - fm.stringWidth(string) - 4;
+        }
+        pg.drawString(string, xPos,
+                ((i * av.getCharHeight()) + ypos + av.getCharHeight())
+                        - (av.getCharHeight() / 5));
+      }
+      if (labels != null)
+      {
+        pg.translate(-3,
+                ypos + (av.getAlignment().getHeight() * av.getCharHeight()));
+
+        pg.setFont(av.getFont());
+        labels.drawComponent(pg, idWidth);
+        pg.translate(
+                +3,
+                -ypos
+                        - (av.getAlignment().getHeight() * av
+                                .getCharHeight()));
+      }
+
+      ypos += cHeight;
+    } while (ypos < totalHeight);
+
+    pg.translate(idWidth, 0);
+
+    getSeqPanel().seqCanvas.drawWrappedPanel(pg, pwidth - idWidth,
+            totalHeight, 0);
+
+    if ((pi * pheight) < totalHeight)
+    {
+      return Printable.PAGE_EXISTS;
+
+    }
+    else
+    {
+      return Printable.NO_SUCH_PAGE;
+    }
+  }
+
+  /**
+   * get current sequence ID panel width, or nominal value if panel were to be
+   * displayed using default settings
+   * 
+   * @return
+   */
+  public int getVisibleIdWidth()
+  {
+    return getVisibleIdWidth(true);
+  }
+
+  /**
+   * get current sequence ID panel width, or nominal value if panel were to be
+   * displayed using default settings
+   * 
+   * @param onscreen
+   *          indicate if the Id width for onscreen or offscreen display should
+   *          be returned
+   * @return
+   */
+  public int getVisibleIdWidth(boolean onscreen)
+  {
+    // see if rendering offscreen - check preferences and calc width accordingly
+    if (!onscreen && Cache.getDefault("FIGURE_AUTOIDWIDTH", false))
+    {
+      return calculateIdWidth(-1).width + 4;
+    }
+    Integer idwidth = null;
+    if (onscreen
+            || (idwidth = Cache.getIntegerProperty("FIGURE_FIXEDIDWIDTH")) == null)
+    {
+      return (getIdPanel().getWidth() > 0 ? getIdPanel().getWidth()
+              : calculateIdWidth().width + 4);
+    }
+    return idwidth.intValue() + 4;
+  }
+
+  void makeAlignmentImage(jalview.util.ImageMaker.TYPE type, File file)
+  {
+    long progress = System.currentTimeMillis();
+    headless = (System.getProperty("java.awt.headless") != null && System
+            .getProperty("java.awt.headless").equals("true"));
+    if (alignFrame != null && !headless)
+    {
+      alignFrame.setProgressBar(MessageManager.formatMessage(
+              "status.saving_file", new Object[] { type.getLabel() }),
+              progress);
+    }
+    try
+    {
+      AlignmentDimension aDimension = getAlignmentDimension();
+      try
+      {
+        jalview.util.ImageMaker im;
+        final String imageAction, imageTitle;
+        if (type == jalview.util.ImageMaker.TYPE.PNG)
+        {
+          imageAction = "Create PNG image from alignment";
+          imageTitle = null;
+        }
+        else if (type == jalview.util.ImageMaker.TYPE.EPS)
+        {
+          imageAction = "Create EPS file from alignment";
+          imageTitle = alignFrame.getTitle();
+        }
+        else
+        {
+          imageAction = "Create SVG file from alignment";
+          imageTitle = alignFrame.getTitle();
+        }
+
+        im = new jalview.util.ImageMaker(this, type, imageAction,
+                aDimension.getWidth(), aDimension.getHeight(), file,
+                imageTitle);
+        if (av.getWrapAlignment())
+        {
+          if (im.getGraphics() != null)
+          {
+            printWrappedAlignment(im.getGraphics(), aDimension.getWidth(),
+                    aDimension.getHeight(), 0);
+            im.writeImage();
+          }
+        }
+        else
+        {
+          if (im.getGraphics() != null)
+          {
+            printUnwrapped(im.getGraphics(), aDimension.getWidth(),
+                    aDimension.getHeight(), 0);
+            im.writeImage();
+          }
+        }
+      } catch (OutOfMemoryError err)
+      {
+        // Be noisy here.
+        System.out.println("########################\n" + "OUT OF MEMORY "
+                + file + "\n" + "########################");
+        new OOMWarning("Creating Image for " + file, err);
+        // System.out.println("Create IMAGE: " + err);
+      } catch (Exception ex)
+      {
+        ex.printStackTrace();
+      }
+    } finally
+    {
+      if (alignFrame != null && !headless)
+      {
+        alignFrame.setProgressBar(
+                MessageManager.getString("status.export_complete"),
+                progress);
+      }
+    }
+  }
+
+  public AlignmentDimension getAlignmentDimension()
+  {
+    int maxwidth = av.getAlignment().getWidth();
+    if (av.hasHiddenColumns())
+    {
+      maxwidth = av.getColumnSelection().findColumnPosition(maxwidth);
+    }
+
+    int height = ((av.getAlignment().getHeight() + 1) * av.getCharHeight())
+            + getScalePanel().getHeight();
+    int width = getVisibleIdWidth(false) + (maxwidth * av.getCharWidth());
+
+    if (av.getWrapAlignment())
+    {
+      height = getWrappedHeight();
+      if (headless)
+      {
+        // need to obtain default alignment width and then add in any
+        // additional allowance for id margin
+        // this duplicates the calculation in getWrappedHeight but adjusts for
+        // offscreen idWith
+        width = alignFrame.getWidth() - vscroll.getPreferredSize().width
+                - alignFrame.getInsets().left
+                - alignFrame.getInsets().right - getVisibleIdWidth()
+                + getVisibleIdWidth(false);
+      }
+      else
+      {
+        width = getSeqPanel().getWidth() + getVisibleIdWidth(false);
+      }
+
+    }
+    else if (av.isShowAnnotation())
+    {
+      height += getAnnotationPanel().adjustPanelHeight() + 3;
+    }
+    return new AlignmentDimension(width, height);
+
+  }
+
+  /**
+   * DOCUMENT ME!
+   */
+  public void makeEPS(File epsFile)
+  {
+    makeAlignmentImage(jalview.util.ImageMaker.TYPE.EPS, epsFile);
+  }
+
+  /**
+   * DOCUMENT ME!
+   */
+  public void makePNG(File pngFile)
+  {
+    makeAlignmentImage(jalview.util.ImageMaker.TYPE.PNG, pngFile);
+  }
+
+  public void makeSVG(File svgFile)
+  {
+    makeAlignmentImage(jalview.util.ImageMaker.TYPE.SVG, svgFile);
+  }
+
+  public void makePNGImageMap(File imgMapFile, String imageName)
+  {
+    // /////ONLY WORKS WITH NONE WRAPPED ALIGNMENTS
+    // ////////////////////////////////////////////
+    int idWidth = getVisibleIdWidth(false);
+    FontMetrics fm = getFontMetrics(av.getFont());
+    int scaleHeight = av.getCharHeight() + fm.getDescent();
+
+    // Gen image map
+    // ////////////////////////////////
+    if (imgMapFile != null)
+    {
+      try
+      {
+        int s, sSize = av.getAlignment().getHeight(), res, alwidth = av
+                .getAlignment().getWidth(), g, gSize, f, fSize, sy;
+        StringBuffer text = new StringBuffer();
+        PrintWriter out = new PrintWriter(new FileWriter(imgMapFile));
+        out.println(jalview.io.HTMLOutput.getImageMapHTML());
+        out.println("<img src=\"" + imageName
+                + "\" border=\"0\" usemap=\"#Map\" >"
+                + "<map name=\"Map\">");
+
+        for (s = 0; s < sSize; s++)
+        {
+          sy = s * av.getCharHeight() + scaleHeight;
+
+          SequenceI seq = av.getAlignment().getSequenceAt(s);
+          SequenceFeature[] features = seq.getSequenceFeatures();
+          SequenceGroup[] groups = av.getAlignment().findAllGroups(seq);
+          for (res = 0; res < alwidth; res++)
+          {
+            text = new StringBuffer();
+            String triplet = null;
+            if (av.getAlignment().isNucleotide())
+            {
+              triplet = ResidueProperties.nucleotideName.get(seq
+                      .getCharAt(res) + "");
+            }
+            else
+            {
+              triplet = ResidueProperties.aa2Triplet.get(seq.getCharAt(res)
+                      + "");
+            }
+
+            if (triplet == null)
+            {
+              continue;
+            }
+
+            int alIndex = seq.findPosition(res);
+            gSize = groups.length;
+            for (g = 0; g < gSize; g++)
+            {
+              if (text.length() < 1)
+              {
+                text.append("<area shape=\"rect\" coords=\""
+                        + (idWidth + res * av.getCharWidth()) + "," + sy
+                        + "," + (idWidth + (res + 1) * av.getCharWidth())
+                        + "," + (av.getCharHeight() + sy) + "\""
+                        + " onMouseOver=\"toolTip('" + alIndex + " "
+                        + triplet);
+              }
+
+              if (groups[g].getStartRes() < res
+                      && groups[g].getEndRes() > res)
+              {
+                text.append("<br><em>" + groups[g].getName() + "</em>");
+              }
+            }
+
+            if (features != null)
+            {
+              if (text.length() < 1)
+              {
+                text.append("<area shape=\"rect\" coords=\""
+                        + (idWidth + res * av.getCharWidth()) + "," + sy
+                        + "," + (idWidth + (res + 1) * av.getCharWidth())
+                        + "," + (av.getCharHeight() + sy) + "\""
+                        + " onMouseOver=\"toolTip('" + alIndex + " "
+                        + triplet);
+              }
+              fSize = features.length;
+              for (f = 0; f < fSize; f++)
+              {
+
+                if ((features[f].getBegin() <= seq.findPosition(res))
+                        && (features[f].getEnd() >= seq.findPosition(res)))
+                {
+                  if (features[f].getType().equals("disulfide bond"))
+                  {
+                    if (features[f].getBegin() == seq.findPosition(res)
+                            || features[f].getEnd() == seq
+                                    .findPosition(res))
+                    {
+                      text.append("<br>disulfide bond "
+                              + features[f].getBegin() + ":"
+                              + features[f].getEnd());
+                    }
+                  }
+                  else
+                  {
+                    text.append("<br>");
+                    text.append(features[f].getType());
+                    if (features[f].getDescription() != null
+                            && !features[f].getType().equals(
+                                    features[f].getDescription()))
+                    {
+                      text.append(" " + features[f].getDescription());
+                    }
+
+                    if (features[f].getValue("status") != null)
+                    {
+                      text.append(" (" + features[f].getValue("status")
+                              + ")");
+                    }
+                  }
+                }
+
+              }
+            }
+            if (text.length() > 1)
+            {
+              text.append("')\"; onMouseOut=\"toolTip()\";  href=\"#\">");
+              out.println(text.toString());
+            }
+          }
+        }
+        out.println("</map></body></html>");
+        out.close();
+
+      } catch (Exception ex)
+      {
+        ex.printStackTrace();
+      }
+    } // /////////END OF IMAGE MAP
+
+  }
+
+  int getWrappedHeight()
+  {
+    int seqPanelWidth = getSeqPanel().seqCanvas.getWidth();
+
+    if (System.getProperty("java.awt.headless") != null
+            && System.getProperty("java.awt.headless").equals("true"))
+    {
+      seqPanelWidth = alignFrame.getWidth() - getVisibleIdWidth()
+              - vscroll.getPreferredSize().width
+              - alignFrame.getInsets().left - alignFrame.getInsets().right;
+    }
+
+    int chunkWidth = getSeqPanel().seqCanvas
+            .getWrappedCanvasWidth(seqPanelWidth);
+
+    int hgap = av.getCharHeight();
+    if (av.getScaleAboveWrapped())
+    {
+      hgap += av.getCharHeight();
+    }
+
+    int annotationHeight = 0;
+    if (av.isShowAnnotation())
+    {
+      annotationHeight = getAnnotationPanel().adjustPanelHeight();
+    }
+
+    int cHeight = av.getAlignment().getHeight() * av.getCharHeight() + hgap
+            + annotationHeight;
+
+    int maxwidth = av.getAlignment().getWidth();
+    if (av.hasHiddenColumns())
+    {
+      maxwidth = av.getColumnSelection().findColumnPosition(maxwidth) - 1;
+    }
+
+    int height = ((maxwidth / chunkWidth) + 1) * cHeight;
+
+    return height;
+  }
+
+  /**
+   * close the panel - deregisters all listeners and nulls any references to
+   * alignment data.
+   */
+  public void closePanel()
+  {
+    PaintRefresher.RemoveComponent(getSeqPanel().seqCanvas);
+    PaintRefresher.RemoveComponent(getIdPanel().getIdCanvas());
+    PaintRefresher.RemoveComponent(this);
+    if (av != null)
+    {
+      jalview.structure.StructureSelectionManager ssm = av
+              .getStructureSelectionManager();
+      ssm.removeStructureViewerListener(getSeqPanel(), null);
+      ssm.removeSelectionListener(getSeqPanel());
+      ssm.removeCommandListener(av);
+      ssm.removeStructureViewerListener(getSeqPanel(), null);
+      ssm.removeSelectionListener(getSeqPanel());
+      av.setAlignment(null);
+      av = null;
+    }
+    else
+    {
+      if (Cache.log.isDebugEnabled())
+      {
+        Cache.log.warn("Closing alignment panel which is already closed.");
+      }
+    }
+  }
+
+  /**
+   * hides or shows dynamic annotation rows based on groups and av state flags
+   */
+  public void updateAnnotation()
+  {
+    updateAnnotation(false, false);
+  }
+
+  public void updateAnnotation(boolean applyGlobalSettings)
+  {
+    updateAnnotation(applyGlobalSettings, false);
+  }
+
+  public void updateAnnotation(boolean applyGlobalSettings,
+          boolean preserveNewGroupSettings)
+  {
+    av.updateGroupAnnotationSettings(applyGlobalSettings,
+            preserveNewGroupSettings);
+    adjustAnnotationHeight();
+  }
+
+  @Override
+  public AlignmentI getAlignment()
+  {
+    return av == null ? null : av.getAlignment();
+  }
+
+  @Override
+  public String getViewName()
+  {
+    return av.viewName;
+  }
+
+  /**
+   * Make/Unmake this alignment panel the current input focus
+   * 
+   * @param b
+   */
+  public void setSelected(boolean b)
+  {
+    try
+    {
+      if (alignFrame.getSplitViewContainer() != null)
+      {
+        /*
+         * bring enclosing SplitFrame to front first if there is one
+         */
+        ((SplitFrame) alignFrame.getSplitViewContainer()).setSelected(b);
+      }
+      alignFrame.setSelected(b);
+    } catch (Exception ex)
+    {
+    }
+
+    if (b)
+    {
+      alignFrame.setDisplayedView(this);
+    }
+  }
+
+  @Override
+  public StructureSelectionManager getStructureSelectionManager()
+  {
+    return av.getStructureSelectionManager();
+  }
+
+  @Override
+  public void raiseOOMWarning(String string, OutOfMemoryError error)
+  {
+    new OOMWarning(string, error, this);
+  }
+
+  @Override
+  public jalview.api.FeatureRenderer cloneFeatureRenderer()
+  {
+
+    return new FeatureRenderer(this);
+  }
+
+  @Override
+  public jalview.api.FeatureRenderer getFeatureRenderer()
+  {
+    return seqPanel.seqCanvas.getFeatureRenderer();
+  }
+
+  public void updateFeatureRenderer(
+          jalview.renderer.seqfeatures.FeatureRenderer fr)
+  {
+    fr.transferSettings(getSeqPanel().seqCanvas.getFeatureRenderer());
+  }
+
+  public void updateFeatureRendererFrom(jalview.api.FeatureRenderer fr)
+  {
+    if (getSeqPanel().seqCanvas.getFeatureRenderer() != null)
+    {
+      getSeqPanel().seqCanvas.getFeatureRenderer().transferSettings(fr);
+    }
+  }
+
+  public ScalePanel getScalePanel()
+  {
+    return scalePanel;
+  }
+
+  public void setScalePanel(ScalePanel scalePanel)
+  {
+    this.scalePanel = scalePanel;
+  }
+
+  public SeqPanel getSeqPanel()
+  {
+    return seqPanel;
+  }
+
+  public void setSeqPanel(SeqPanel seqPanel)
+  {
+    this.seqPanel = seqPanel;
+  }
+
+  public AnnotationPanel getAnnotationPanel()
+  {
+    return annotationPanel;
+  }
+
+  public void setAnnotationPanel(AnnotationPanel annotationPanel)
+  {
+    this.annotationPanel = annotationPanel;
+  }
+
+  public AnnotationLabels getAlabels()
+  {
+    return alabels;
+  }
+
+  public void setAlabels(AnnotationLabels alabels)
+  {
+    this.alabels = alabels;
+  }
+
+  public IdPanel getIdPanel()
+  {
+    return idPanel;
+  }
+
+  public void setIdPanel(IdPanel idPanel)
+  {
+    this.idPanel = idPanel;
+  }
+
+  /**
+   * Follow a scrolling change in the (cDNA/Protein) complementary alignment.
+   * The aim is to keep the two alignments 'lined up' on their centre columns.
+   * 
+   * @param sr
+   *          holds mapped region(s) of this alignment that we are scrolling
+   *          'to'; may be modified for sequence offset by this method
+   * @param verticalOffset
+   *          the number of visible sequences to show above the mapped region
+   */
+  public void scrollToCentre(SearchResults sr, int verticalOffset)
+  {
+    /*
+     * To avoid jumpy vertical scrolling (if some sequences are gapped or not
+     * mapped), we can make the scroll-to location a sequence above the one
+     * actually mapped.
+     */
+    SequenceI mappedTo = sr.getResultSequence(0);
+    List<SequenceI> seqs = av.getAlignment().getSequences();
+
+    /*
+     * This is like AlignmentI.findIndex(seq) but here we are matching the
+     * dataset sequence not the aligned sequence
+     */
+    boolean matched = false;
+    for (SequenceI seq : seqs)
+    {
+      if (mappedTo == seq.getDatasetSequence())
+      {
+        matched = true;
+        break;
+      }
+    }
+    if (!matched)
+    {
+      return; // failsafe, shouldn't happen
+    }
+
+    /*
+     * Scroll to position but centring the target residue.
+     */
+    scrollToPosition(sr, verticalOffset, true, true);
+  }
+
+  /**
+   * Set a flag to say do not scroll any (cDNA/protein) complement.
+   * 
+   * @param b
+   */
+  protected void setDontScrollComplement(boolean b)
+  {
+    this.dontScrollComplement = b;
+  }
+
+  protected boolean isDontScrollComplement()
+  {
+    return this.dontScrollComplement;
+  }
+}