JAL-1517 update copyright to version 2.8.2
[jalview.git] / src / jalview / gui / SeqPanel.java
old mode 100755 (executable)
new mode 100644 (file)
index 7d451da..f371879
@@ -1,43 +1,47 @@
 /*
- * Jalview - A Sequence Alignment Editor and Viewer
- * Copyright (C) 2007 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ * Jalview - A Sequence Alignment Editor and Viewer (Version 2.8.2)
+ * Copyright (C) 2014 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 java.util.*;
+import java.util.List;
 
 import java.awt.*;
 import java.awt.event.*;
+
 import javax.swing.*;
 
 import jalview.commands.*;
 import jalview.datamodel.*;
+import jalview.io.SequenceAnnotationReport;
 import jalview.schemes.*;
 import jalview.structure.*;
+import jalview.util.MessageManager;
 
 /**
  * DOCUMENT ME!
- *
+ * 
  * @author $author$
- * @version $Revision$
+ * @version $Revision: 1.130 $
  */
-public class SeqPanel
-    extends JPanel implements MouseListener,
-    MouseMotionListener, MouseWheelListener, SequenceListener
+public class SeqPanel extends JPanel implements MouseListener,
+        MouseMotionListener, MouseWheelListener, SequenceListener,
+        SelectionListener
 
 {
   /** DOCUMENT ME!! */
@@ -45,50 +49,70 @@ public class SeqPanel
 
   /** DOCUMENT ME!! */
   public AlignmentPanel ap;
+
   protected int lastres;
+
   protected int startseq;
+
   protected AlignViewport av;
 
   ScrollThread scrollThread = null;
+
   boolean mouseDragging = false;
+
   boolean editingSeqs = false;
+
   boolean groupEditing = false;
 
-  //////////////////////////////////////////
-  /////Everything below this is for defining the boundary of the rubberband
-  //////////////////////////////////////////
+  // ////////////////////////////////////////
+  // ///Everything below this is for defining the boundary of the rubberband
+  // ////////////////////////////////////////
   int oldSeq = -1;
+
   boolean changeEndSeq = false;
+
   boolean changeStartSeq = false;
+
   boolean changeEndRes = false;
+
   boolean changeStartRes = false;
+
   SequenceGroup stretchGroup = null;
+
   boolean remove = false;
 
   Point lastMousePress;
+
   boolean mouseWheelPressed = false;
+
   StringBuffer keyboardNo1;
+
   StringBuffer keyboardNo2;
 
   java.net.URL linkImageURL;
 
+  private final SequenceAnnotationReport seqARep;
+
   StringBuffer tooltipText = new StringBuffer("<html>");
+
   String tmpString;
 
   EditCommand editCommand;
 
   StructureSelectionManager ssm;
 
-
   /**
    * Creates a new SeqPanel object.
-   *
-   * @param avp DOCUMENT ME!
-   * @param p DOCUMENT ME!
+   * 
+   * @param avp
+   *          DOCUMENT ME!
+   * @param p
+   *          DOCUMENT ME!
    */
   public SeqPanel(AlignViewport av, AlignmentPanel ap)
   {
     linkImageURL = getClass().getResource("/images/link.gif");
+    seqARep = new SequenceAnnotationReport(linkImageURL.toString());
     ToolTipManager.sharedInstance().registerComponent(this);
     ToolTipManager.sharedInstance().setInitialDelay(0);
     ToolTipManager.sharedInstance().setDismissDelay(10000);
@@ -106,13 +130,16 @@ public class SeqPanel
       addMouseMotionListener(this);
       addMouseListener(this);
       addMouseWheelListener(this);
-      ssm = StructureSelectionManager.getStructureSelectionManager();
+      ssm = av.getStructureSelectionManager();
       ssm.addStructureViewerListener(this);
+      ssm.addSelectionListener(this);
     }
   }
 
   int startWrapBlock = -1;
+
   int wrappedBlock = -1;
+
   int findRes(MouseEvent evt)
   {
     int res = 0;
@@ -127,8 +154,8 @@ public class SeqPanel
         hgap += av.charHeight;
       }
 
-      int cHeight = av.getAlignment().getHeight() * av.charHeight
-          + hgap + seqCanvas.getAnnotationHeight();
+      int cHeight = av.getAlignment().getHeight() * av.charHeight + hgap
+              + seqCanvas.getAnnotationHeight();
 
       int y = evt.getY();
       y -= hgap;
@@ -148,10 +175,16 @@ public class SeqPanel
     }
     else
     {
+      if (x > seqCanvas.getWidth() + seqCanvas.getWidth())
+      {
+        // make sure we calculate relative to visible alignment, rather than
+        // right-hand gutter
+        x = seqCanvas.getX() + seqCanvas.getWidth();
+      }
       res = (x / av.getCharWidth()) + av.getStartRes();
     }
 
-    if (av.hasHiddenColumns)
+    if (av.hasHiddenColumns())
     {
       res = av.getColumnSelection().adjustForHiddenColumns(res);
     }
@@ -173,18 +206,18 @@ public class SeqPanel
         hgap += av.charHeight;
       }
 
-      int cHeight = av.getAlignment().getHeight() * av.charHeight
-          + hgap + seqCanvas.getAnnotationHeight();
+      int cHeight = av.getAlignment().getHeight() * av.charHeight + hgap
+              + seqCanvas.getAnnotationHeight();
 
       y -= hgap;
 
-      seq = Math.min( (y % cHeight) / av.getCharHeight(),
-                     av.alignment.getHeight() - 1);
+      seq = Math.min((y % cHeight) / av.getCharHeight(), av.getAlignment()
+              .getHeight() - 1);
     }
     else
     {
-      seq = Math.min( (y / av.getCharHeight()) + av.getStartSeq(),
-                     av.alignment.getHeight() - 1);
+      seq = Math.min((y / av.getCharHeight()) + av.getStartSeq(), av
+              .getAlignment().getHeight() - 1);
     }
 
     return seq;
@@ -199,20 +232,21 @@ public class SeqPanel
       for (int i = 0; i < features.length; i++)
       {
         if (av.featuresDisplayed == null
-            || !av.featuresDisplayed.containsKey(features[i].getType()))
+                || !av.featuresDisplayed.containsKey(features[i].getType()))
         {
           continue;
         }
 
         if (features[i].featureGroup != null
-           && seqCanvas.fr.featureGroups!=null
-            && seqCanvas.fr.featureGroups.containsKey(features[i].featureGroup)
-            && !((Boolean)seqCanvas.fr.featureGroups.get(features[i].featureGroup)).booleanValue())
+                && seqCanvas.fr.featureGroups != null
+                && seqCanvas.fr.featureGroups
+                        .containsKey(features[i].featureGroup)
+                && !((Boolean) seqCanvas.fr.featureGroups
+                        .get(features[i].featureGroup)).booleanValue())
           continue;
 
-
-        if ( (features[i].getBegin() <= res) &&
-            (features[i].getEnd() >= res))
+        if ((features[i].getBegin() <= res)
+                && (features[i].getEnd() >= res))
         {
           tmp.addElement(features[i]);
         }
@@ -225,14 +259,13 @@ public class SeqPanel
     return features;
   }
 
-
   void endEditing()
   {
     if (editCommand != null && editCommand.getSize() > 0)
     {
       ap.alignFrame.addHistoryItem(editCommand);
-      av.firePropertyChange("alignment", null,
-                            av.getAlignment().getSequences());
+      av.firePropertyChange("alignment", null, av.getAlignment()
+              .getSequences());
     }
 
     startseq = -1;
@@ -272,12 +305,9 @@ public class SeqPanel
 
   void setCursorPosition()
   {
-    SequenceI sequence =
-        (Sequence) av.getAlignment().getSequenceAt(seqCanvas.cursorY);
+    SequenceI sequence = av.getAlignment().getSequenceAt(seqCanvas.cursorY);
 
-    seqCanvas.cursorX = sequence.findIndex(
-        getKeyboardNo1() - 1
-        );
+    seqCanvas.cursorX = sequence.findIndex(getKeyboardNo1()) - 1;
     scrollToVisible();
   }
 
@@ -285,20 +315,20 @@ public class SeqPanel
   {
     seqCanvas.cursorX += dx;
     seqCanvas.cursorY += dy;
-    if (av.hasHiddenColumns && !av.colSel.isVisible(seqCanvas.cursorX))
+    if (av.hasHiddenColumns()
+            && !av.getColumnSelection().isVisible(seqCanvas.cursorX))
     {
       int original = seqCanvas.cursorX - dx;
-      int maxWidth = av.alignment.getWidth();
+      int maxWidth = av.getAlignment().getWidth();
 
-      while (!av.colSel.isVisible(seqCanvas.cursorX)
-             && seqCanvas.cursorX < maxWidth
-             && seqCanvas.cursorX > 0)
+      while (!av.getColumnSelection().isVisible(seqCanvas.cursorX)
+              && seqCanvas.cursorX < maxWidth && seqCanvas.cursorX > 0)
       {
         seqCanvas.cursorX += dx;
       }
 
       if (seqCanvas.cursorX >= maxWidth
-          || !av.colSel.isVisible(seqCanvas.cursorX))
+              || !av.getColumnSelection().isVisible(seqCanvas.cursorX))
       {
         seqCanvas.cursorX = original;
       }
@@ -313,18 +343,18 @@ public class SeqPanel
     {
       seqCanvas.cursorX = 0;
     }
-    else if (seqCanvas.cursorX > av.alignment.getWidth() - 1)
+    else if (seqCanvas.cursorX > av.getAlignment().getWidth() - 1)
     {
-      seqCanvas.cursorX = av.alignment.getWidth() - 1;
+      seqCanvas.cursorX = av.getAlignment().getWidth() - 1;
     }
 
     if (seqCanvas.cursorY < 0)
     {
       seqCanvas.cursorY = 0;
     }
-    else if (seqCanvas.cursorY > av.alignment.getHeight() - 1)
+    else if (seqCanvas.cursorY > av.getAlignment().getHeight() - 1)
     {
-      seqCanvas.cursorY = av.alignment.getHeight() - 1;
+      seqCanvas.cursorY = av.getAlignment().getHeight() - 1;
     }
 
     endEditing();
@@ -344,14 +374,16 @@ public class SeqPanel
       }
       if (!av.wrapAlignment)
       {
-        while (seqCanvas.cursorX < av.colSel.adjustForHiddenColumns(av.startRes))
+        while (seqCanvas.cursorX < av.getColumnSelection()
+                .adjustForHiddenColumns(av.startRes))
         {
           if (!ap.scrollRight(false))
           {
             break;
           }
         }
-        while (seqCanvas.cursorX > av.colSel.adjustForHiddenColumns(av.endRes))
+        while (seqCanvas.cursorX > av.getColumnSelection()
+                .adjustForHiddenColumns(av.endRes))
         {
           if (!ap.scrollRight(true))
           {
@@ -360,25 +392,24 @@ public class SeqPanel
         }
       }
     }
-    setStatusMessage(av.alignment.getSequenceAt(seqCanvas.cursorY),
-                     seqCanvas.cursorX, seqCanvas.cursorY);
+    setStatusMessage(av.getAlignment().getSequenceAt(seqCanvas.cursorY),
+            seqCanvas.cursorX, seqCanvas.cursorY);
 
     seqCanvas.repaint();
   }
 
   void setSelectionAreaAtCursor(boolean topLeft)
   {
-    SequenceI sequence =
-        (Sequence) av.getAlignment().getSequenceAt(seqCanvas.cursorY);
+    SequenceI sequence = av.getAlignment().getSequenceAt(seqCanvas.cursorY);
 
     if (av.getSelectionGroup() != null)
     {
-      SequenceGroup sg = av.selectionGroup;
-      //Find the top and bottom of this group
-      int min = av.alignment.getHeight(), max = 0;
+      SequenceGroup sg = av.getSelectionGroup();
+      // Find the top and bottom of this group
+      int min = av.getAlignment().getHeight(), max = 0;
       for (int i = 0; i < sg.getSize(); i++)
       {
-        int index = av.alignment.findIndex(sg.getSequenceAt(i));
+        int index = av.getAlignment().findIndex(sg.getSequenceAt(i));
         if (index > max)
         {
           max = index;
@@ -423,7 +454,7 @@ public class SeqPanel
         sg.getSequences(null).clear();
         for (int i = min; i < max; i++)
         {
-          sg.addSequence(av.alignment.getSequenceAt(i), false);
+          sg.addSequence(av.getAlignment().getSequenceAt(i), false);
         }
       }
     }
@@ -438,6 +469,7 @@ public class SeqPanel
     }
 
     ap.paintAlignment(false);
+    av.sendSelection();
   }
 
   void insertGapAtCursor(boolean group)
@@ -445,7 +477,7 @@ public class SeqPanel
     groupEditing = group;
     startseq = seqCanvas.cursorY;
     lastres = seqCanvas.cursorX;
-    editSequence(true, seqCanvas.cursorX + getKeyboardNo1());
+    editSequence(true, false, seqCanvas.cursorX + getKeyboardNo1());
     endEditing();
   }
 
@@ -454,7 +486,16 @@ public class SeqPanel
     groupEditing = group;
     startseq = seqCanvas.cursorY;
     lastres = seqCanvas.cursorX + getKeyboardNo1();
-    editSequence(false, seqCanvas.cursorX);
+    editSequence(false, false, seqCanvas.cursorX);
+    endEditing();
+  }
+
+  void insertNucAtCursor(boolean group, String nuc)
+  {
+    groupEditing = group;
+    startseq = seqCanvas.cursorY;
+    lastres = seqCanvas.cursorX;
+    editSequence(false, true, seqCanvas.cursorX + getKeyboardNo1());
     endEditing();
   }
 
@@ -477,33 +518,40 @@ public class SeqPanel
 
   int getKeyboardNo1()
   {
-    if (keyboardNo1 == null)
-      return 1;
-    else
+    try {
+    if (keyboardNo1 != null) 
     {
       int value = Integer.parseInt(keyboardNo1.toString());
       keyboardNo1 = null;
       return value;
     }
+    } catch (Exception x)
+    {}
+    keyboardNo1 = null;
+    return 1;
   }
 
   int getKeyboardNo2()
   {
-    if (keyboardNo2 == null)
-      return 1;
-    else
-    {
+    try {
+    if (keyboardNo2!=null){
       int value = Integer.parseInt(keyboardNo2.toString());
       keyboardNo2 = null;
       return value;
     }
+    } catch (Exception x)
+    {}
+    keyboardNo2 = null;
+    return 1;
   }
 
   /**
    * DOCUMENT ME!
-   *
-   * @param evt DOCUMENT ME!
+   * 
+   * @param evt
+   *          DOCUMENT ME!
    */
+  @Override
   public void mouseReleased(MouseEvent evt)
   {
     mouseDragging = false;
@@ -520,9 +568,11 @@ public class SeqPanel
 
   /**
    * DOCUMENT ME!
-   *
-   * @param evt DOCUMENT ME!
+   * 
+   * @param evt
+   *          DOCUMENT ME!
    */
+  @Override
   public void mousePressed(MouseEvent evt)
   {
     lastMousePress = evt.getPoint();
@@ -533,8 +583,7 @@ public class SeqPanel
       return;
     }
 
-    if (evt.isShiftDown() || evt.isAltDown() ||
-        evt.isControlDown())
+    if (evt.isShiftDown() || evt.isAltDown() || evt.isControlDown())
     {
       if (evt.isAltDown() || evt.isControlDown())
       {
@@ -556,8 +605,8 @@ public class SeqPanel
       return;
     }
 
-    if ( (seq < av.getAlignment().getHeight()) &&
-        (res < av.getAlignment().getSequenceAt(seq).getLength()))
+    if ((seq < av.getAlignment().getHeight())
+            && (res < av.getAlignment().getSequenceAt(seq).getLength()))
     {
       startseq = seq;
       lastres = res;
@@ -572,35 +621,47 @@ public class SeqPanel
   }
 
   String lastMessage;
+
+  @Override
   public void mouseOverSequence(SequenceI sequence, int index, int pos)
   {
-    String tmp = sequence.hashCode()+" "+index+" "+pos;
-    
+    String tmp = sequence.hashCode() + " " + index + " " + pos;
+
     if (lastMessage == null || !lastMessage.equals(tmp))
     {
       // System.err.println("mouseOver Sequence: "+tmp);
-      ssm.mouseOverSequence(sequence, index, pos);
+      ssm.mouseOverSequence(sequence, index, pos, av);
     }
     lastMessage = tmp;
   }
 
-
+  @Override
   public void highlightSequence(SearchResults results)
   {
-      seqCanvas.highlightSearchResults(results);
+    if (av.followHighlight)
+    {
+      if (ap.scrollToPosition(results, false))
+      {
+        seqCanvas.revalidate();
+      }
+    }
+    seqCanvas.highlightSearchResults(results);
   }
 
+  @Override
   public void updateColours(SequenceI seq, int index)
   {
     System.out.println("update the seqPanel colours");
-    //repaint();
+    // repaint();
   }
 
   /**
    * DOCUMENT ME!
-   *
-   * @param evt DOCUMENT ME!
+   * 
+   * @param evt
+   *          DOCUMENT ME!
    */
+  @Override
   public void mouseMoved(MouseEvent evt)
   {
     if (editingSeqs)
@@ -626,13 +687,12 @@ public class SeqPanel
     }
 
     pos = setStatusMessage(sequence, res, seq);
-    if (ssm != null && pos>-1)
+    if (ssm != null && pos > -1)
       mouseOverSequence(sequence, res, pos);
 
-
     tooltipText.setLength(6); // Cuts the buffer back to <html>
 
-    SequenceGroup[] groups = av.alignment.findAllGroups(sequence);
+    SequenceGroup[] groups = av.getAlignment().findAllGroups(sequence);
     if (groups != null)
     {
       for (int g = 0; g < groups.length; g++)
@@ -644,8 +704,8 @@ public class SeqPanel
             tooltipText.append("<br>");
           }
 
-          if (!groups[g].getName().startsWith("JTreeGroup") &&
-              !groups[g].getName().startsWith("JGroup"))
+          if (!groups[g].getName().startsWith("JTreeGroup")
+                  && !groups[g].getName().startsWith("JGroup"))
           {
             tooltipText.append(groups[g].getName());
           }
@@ -661,141 +721,80 @@ public class SeqPanel
     // use aa to see if the mouse pointer is on a
     if (av.showSequenceFeatures)
     {
+      int rpos;
       SequenceFeature[] features = findFeaturesAtRes(
-          sequence.getDatasetSequence(), sequence.findPosition(res));
-
-      if (features != null)
-      {
-        for (int i = 0; i < features.length; i++)
-        {
-          if (features[i].getType().equals("disulfide bond"))
-          {
-            if (features[i].getBegin() == sequence.findPosition(res)
-                || features[i].getEnd() == sequence.findPosition(res))
-            {
-              if (tooltipText.length() > 6)
-              {
-                tooltipText.append("<br>");
-              }
-              tooltipText.append("disulfide bond " + features[i].getBegin() +
-                                 ":" +
-                                 features[i].getEnd());
-              if (features[i].links != null)
-              {
-                tooltipText.append(" <img src=\"" + linkImageURL + "\">");
-              }
-            }
-          }
-          else
-          {
-            if (tooltipText.length() > 6)
-            {
-              tooltipText.append("<br>");
-            }
-
-            tooltipText.append(features[i].getType() + " " +
-                               features[i].begin);
-            if (features[i].begin != features[i].end)
-            {
-              tooltipText.append(" " + features[i].end);
-            }
-
-            if (features[i].getDescription() != null
-                && !features[i].description.equals(features[i].getType()))
-            {
-              tmpString = features[i].getDescription();
-              int startTag = tmpString.toUpperCase().indexOf("<HTML>");
-              if (startTag > -1)
-              {
-                tmpString = tmpString.substring(startTag + 6);
-              }
-              int endTag = tmpString.toUpperCase().indexOf("</BODY>");
-              if (endTag > -1)
-              {
-                tmpString = tmpString.substring(0, endTag);
-              }
-              endTag = tmpString.toUpperCase().indexOf("</HTML>");
-              if (endTag > -1)
-              {
-                tmpString = tmpString.substring(0, endTag);
-              }
-
-              if (startTag > -1)
-              {
-                tooltipText.append("; " + tmpString);
-              }
-              else
-              {
-                if (tmpString.indexOf("<") > -1 || tmpString.indexOf(">") > -1)
-                {
-                  //The description does not specify html is to
-                  //be used, so we must remove < > symbols
-                  tmpString = tmpString.replaceAll("<", "&lt;");
-                  tmpString = tmpString.replaceAll(">", "&gt;");
-
-                  tooltipText.append("; ");
-                  tooltipText.append(tmpString);
-
-                }
-                else
-                {
-                  tooltipText.append("; " + tmpString);
-                }
-              }
-            }
-            if (features[i].getValue("status") != null)
-            {
-              String status = features[i].getValue("status").toString();
-              if (status.length() > 0)
-              {
-                tooltipText.append("; (" + features[i].getValue("status") + ")");
-              }
-            }
-
-            if (features[i].links != null)
-            {
-              tooltipText.append(" <img src=\"" + linkImageURL + "\">");
-            }
-
-          }
-        }
-      }
+              sequence.getDatasetSequence(),
+              rpos = sequence.findPosition(res));
+      seqARep.appendFeatures(tooltipText, rpos, features,
+              this.ap.seqPanel.seqCanvas.fr.minmax);
     }
-
     if (tooltipText.length() == 6) // <html></html>
     {
       setToolTipText(null);
+      lastTooltip = null;
     }
     else
     {
       tooltipText.append("</html>");
-      if (lastTooltip == null || !lastTooltip.equals(tooltipText.toString()))
+      if (lastTooltip == null
+              || !lastTooltip.equals(tooltipText.toString()))
+      {
         setToolTipText(tooltipText.toString());
+        lastTooltip = tooltipText.toString();
+      }
 
-      lastTooltip = tooltipText.toString();
     }
 
   }
+
+  private Point lastp = null;
+
+  /*
+   * (non-Javadoc)
+   * 
+   * @see javax.swing.JComponent#getToolTipLocation(java.awt.event.MouseEvent)
+   */
+  public Point getToolTipLocation(MouseEvent event)
+  {
+    int x = event.getX(), w = getWidth();
+    int wdth = (w - x < 200) ? -(w / 2) : 5; // switch sides when tooltip is too
+    // close to edge
+    Point p = lastp;
+    if (!event.isShiftDown() || p == null)
+    {
+      p = (tooltipText != null && tooltipText.length() > 6) ? new Point(
+              event.getX() + wdth, event.getY() - 20) : null;
+    }
+    /*
+     * TODO: try to modify position region is not obcured by tooltip
+     */
+    return lastp = p;
+  }
+
   String lastTooltip;
 
   /**
    * Set status message in alignment panel
-   * @param sequence aligned sequence object
-   * @param res alignment column
-   * @param seq index of sequence in alignment
+   * 
+   * @param sequence
+   *          aligned sequence object
+   * @param res
+   *          alignment column
+   * @param seq
+   *          index of sequence in alignment
    * @return position of res in sequence
    */
   int setStatusMessage(SequenceI sequence, int res, int seq)
   {
-    int pos=-1;
-    StringBuffer text = new StringBuffer("Sequence " + (seq + 1) + " ID: " +
-                                         sequence.getName());
+    int pos = -1;
+    StringBuffer text = new StringBuffer("Sequence " + (seq + 1) + " ID: "
+            + sequence.getName());
 
     Object obj = null;
-    if (av.alignment.isNucleotide())
+    if (av.getAlignment().isNucleotide())
     {
-      obj = ResidueProperties.nucleotideName.get(sequence.getCharAt(res) +
-                                                 "");
+      obj = ResidueProperties.nucleotideName.get(sequence.getCharAt(res)
+              + "");
       if (obj != null)
       {
         text.append(" Nucleotide: ");
@@ -812,11 +811,10 @@ public class SeqPanel
 
     if (obj != null)
     {
-      pos=sequence.findPosition(res);
+      pos = sequence.findPosition(res);
       if (obj != "")
       {
-        text.append(obj + " (" + pos +
-                    ")");
+        text.append(obj + " (" + pos + ")");
       }
     }
     ap.alignFrame.statusBar.setText(text.toString());
@@ -825,18 +823,20 @@ public class SeqPanel
 
   /**
    * DOCUMENT ME!
-   *
-   * @param evt DOCUMENT ME!
+   * 
+   * @param evt
+   *          DOCUMENT ME!
    */
+  @Override
   public void mouseDragged(MouseEvent evt)
   {
     if (mouseWheelPressed)
     {
       int oldWidth = av.charWidth;
 
-      //Which is bigger, left-right or up-down?
-      if (Math.abs(evt.getY() - lastMousePress.getY())
-          > Math.abs(evt.getX() - lastMousePress.getX()))
+      // Which is bigger, left-right or up-down?
+      if (Math.abs(evt.getY() - lastMousePress.getY()) > Math.abs(evt
+              .getX() - lastMousePress.getX()))
       {
         int fontSize = av.font.getSize();
 
@@ -893,19 +893,19 @@ public class SeqPanel
       res = 0;
     }
 
-    if ( (lastres == -1) || (lastres == res))
+    if ((lastres == -1) || (lastres == res))
     {
       return;
     }
 
-    if ( (res < av.getAlignment().getWidth()) && (res < lastres))
+    if ((res < av.getAlignment().getWidth()) && (res < lastres))
     {
       // dragLeft, delete gap
-      editSequence(false, res);
+      editSequence(false, false, res);
     }
     else
     {
-      editSequence(true, res);
+      editSequence(true, false, res);
     }
 
     mouseDragging = true;
@@ -915,24 +915,23 @@ public class SeqPanel
     }
   }
 
-
-
-  synchronized void editSequence(boolean insertGap, int startres)
+  // TODO: Make it more clever than many booleans
+  synchronized void editSequence(boolean insertGap, boolean editSeq,
+          int startres)
   {
     int fixedLeft = -1;
     int fixedRight = -1;
     boolean fixedColumns = false;
     SequenceGroup sg = av.getSelectionGroup();
 
-    SequenceI seq = av.alignment.getSequenceAt(startseq);
+    SequenceI seq = av.getAlignment().getSequenceAt(startseq);
 
-    //No group, but the sequence may represent a group
-    if (!groupEditing && av.hasHiddenRows)
+    // No group, but the sequence may represent a group
+    if (!groupEditing && av.hasHiddenRows())
     {
-      if (av.hiddenRepSequences != null
-          && av.hiddenRepSequences.containsKey(seq))
+      if (av.isHiddenRepSequence(seq))
       {
-        sg = (SequenceGroup) av.hiddenRepSequences.get(seq);
+        sg = av.getRepresentedSequences(seq);
         groupEditing = true;
       }
     }
@@ -972,32 +971,32 @@ public class SeqPanel
     message.append(Math.abs(startres - lastres) + " gaps.");
     ap.alignFrame.statusBar.setText(message.toString());
 
-    //Are we editing within a selection group?
+    // Are we editing within a selection group?
     if (groupEditing
-        || (sg != null && sg.getSequences(av.hiddenRepSequences).contains(seq)))
+            || (sg != null && sg.getSequences(av.getHiddenRepSequences())
+                    .contains(seq)))
     {
       fixedColumns = true;
 
-      //sg might be null as the user may only see 1 sequence,
-      //but the sequence represents a group
+      // sg might be null as the user may only see 1 sequence,
+      // but the sequence represents a group
       if (sg == null)
       {
-        if (av.hiddenRepSequences == null
-            || !av.hiddenRepSequences.containsKey(seq))
+        if (!av.isHiddenRepSequence(seq))
         {
           endEditing();
           return;
         }
-        sg = (SequenceGroup) av.hiddenRepSequences.get(seq);
+        sg = av.getRepresentedSequences(seq);
       }
 
       fixedLeft = sg.getStartRes();
       fixedRight = sg.getEndRes();
 
-      if ( (startres < fixedLeft && lastres >= fixedLeft)
-          || (startres >= fixedLeft && lastres < fixedLeft)
-          || (startres > fixedRight && lastres <= fixedRight)
-          || (startres <= fixedRight && lastres > fixedRight))
+      if ((startres < fixedLeft && lastres >= fixedLeft)
+              || (startres >= fixedLeft && lastres < fixedLeft)
+              || (startres > fixedRight && lastres <= fixedRight)
+              || (startres <= fixedRight && lastres > fixedRight))
       {
         endEditing();
         return;
@@ -1015,21 +1014,21 @@ public class SeqPanel
       }
     }
 
-    if (av.hasHiddenColumns)
+    if (av.hasHiddenColumns())
     {
       fixedColumns = true;
       int y1 = av.getColumnSelection().getHiddenBoundaryLeft(startres);
       int y2 = av.getColumnSelection().getHiddenBoundaryRight(startres);
 
-      if ( (insertGap && startres > y1 && lastres < y1)
-          || (!insertGap && startres < y2 && lastres > y2))
+      if ((insertGap && startres > y1 && lastres < y1)
+              || (!insertGap && startres < y2 && lastres > y2))
       {
         endEditing();
         return;
       }
 
-      //System.out.print(y1+" "+y2+" "+fixedLeft+" "+fixedRight+"~~");
-      //Selection spans a hidden region
+      // System.out.print(y1+" "+y2+" "+fixedLeft+" "+fixedRight+"~~");
+      // Selection spans a hidden region
       if (fixedLeft < y1 && (fixedRight > y2 || fixedRight == -1))
       {
         if (startres >= y2)
@@ -1045,25 +1044,23 @@ public class SeqPanel
 
     if (groupEditing)
     {
-      Vector vseqs = sg.getSequences(av.hiddenRepSequences);
+      List<SequenceI> vseqs = sg.getSequences(av.getHiddenRepSequences());
       int g, groupSize = vseqs.size();
       SequenceI[] groupSeqs = new SequenceI[groupSize];
       for (g = 0; g < groupSeqs.length; g++)
       {
-        groupSeqs[g] = (SequenceI) vseqs.elementAt(g);
+        groupSeqs[g] = vseqs.get(g);
       }
 
       // drag to right
       if (insertGap)
       {
-        //If the user has selected the whole sequence, and is dragging to
+        // If the user has selected the whole sequence, and is dragging to
         // the right, we can still extend the alignment and selectionGroup
-        if (sg.getStartRes() == 0
-            && sg.getEndRes() == fixedRight
-            && sg.getEndRes() == av.alignment.getWidth() - 1
-            )
+        if (sg.getStartRes() == 0 && sg.getEndRes() == fixedRight
+                && sg.getEndRes() == av.getAlignment().getWidth() - 1)
         {
-          sg.setEndRes(av.alignment.getWidth() + startres - lastres);
+          sg.setEndRes(av.getAlignment().getWidth() + startres - lastres);
           fixedRight = sg.getEndRes();
         }
 
@@ -1071,9 +1068,7 @@ public class SeqPanel
         // Find the next gap before the end
         // of the visible region boundary
         boolean blank = false;
-        for (fixedRight = fixedRight;
-             fixedRight > lastres;
-             fixedRight--)
+        for (fixedRight = fixedRight; fixedRight > lastres; fixedRight--)
         {
           blank = true;
 
@@ -1081,8 +1076,8 @@ public class SeqPanel
           {
             for (int j = 0; j < startres - lastres; j++)
             {
-              if (!jalview.util.Comparison.isGap(
-                  groupSeqs[g].getCharAt(fixedRight - j)))
+              if (!jalview.util.Comparison.isGap(groupSeqs[g]
+                      .getCharAt(fixedRight - j)))
               {
                 blank = false;
                 break;
@@ -1097,27 +1092,27 @@ public class SeqPanel
 
         if (!blank)
         {
-          if (sg.getSize() == av.alignment.getHeight())
+          if (sg.getSize() == av.getAlignment().getHeight())
           {
-            if ( (av.hasHiddenColumns
-                  &&
-                  startres < av.getColumnSelection().getHiddenBoundaryRight(startres)))
+            if ((av.hasHiddenColumns() && startres < av
+                    .getColumnSelection().getHiddenBoundaryRight(startres)))
             {
               endEditing();
               return;
             }
 
-            int alWidth = av.alignment.getWidth();
-            if (av.hasHiddenRows)
+            int alWidth = av.getAlignment().getWidth();
+            if (av.hasHiddenRows())
             {
-              int hwidth = av.alignment.getHiddenSequences().getWidth();
+              int hwidth = av.getAlignment().getHiddenSequences()
+                      .getWidth();
               if (hwidth > alWidth)
               {
                 alWidth = hwidth;
               }
             }
-            //We can still insert gaps if the selectionGroup
-            //contains all the sequences
+            // We can still insert gaps if the selectionGroup
+            // contains all the sequences
             sg.setEndRes(sg.getEndRes() + startres - lastres);
             fixedRight = alWidth + startres - lastres;
           }
@@ -1132,7 +1127,7 @@ public class SeqPanel
       // drag to left
       else if (!insertGap)
       {
-        /// Are we able to delete?
+        // / Are we able to delete?
         // ie are all columns blank?
 
         for (g = 0; g < groupSize; g++)
@@ -1144,8 +1139,7 @@ public class SeqPanel
               continue;
             }
 
-            if (!jalview.util.Comparison.isGap(
-                groupSeqs[g].getCharAt(j)))
+            if (!jalview.util.Comparison.isGap(groupSeqs[g].getCharAt(j)))
             {
               // Not a gap, block edit not valid
               endEditing();
@@ -1167,11 +1161,8 @@ public class SeqPanel
         }
         else
         {
-          editCommand.appendEdit(EditCommand.INSERT_GAP,
-                                 groupSeqs,
-                                 startres, startres - lastres,
-                                 av.alignment,
-                                 true);
+          editCommand.appendEdit(EditCommand.INSERT_GAP, groupSeqs,
+                  startres, startres - lastres, av.getAlignment(), true);
         }
       }
       else
@@ -1186,16 +1177,14 @@ public class SeqPanel
         }
         else
         {
-          editCommand.appendEdit(EditCommand.DELETE_GAP,
-                                 groupSeqs,
-                                 startres, lastres - startres,
-                                 av.alignment,
-                                 true);
+          editCommand.appendEdit(EditCommand.DELETE_GAP, groupSeqs,
+                  startres, lastres - startres, av.getAlignment(), true);
         }
 
       }
     }
-    else /////Editing a single sequence///////////
+    else
+    // ///Editing a single sequence///////////
     {
       if (insertGap)
       {
@@ -1205,56 +1194,68 @@ public class SeqPanel
           for (int j = lastres; j < startres; j++)
           {
             insertChar(j, new SequenceI[]
-                       {seq}, fixedRight);
+            { seq }, fixedRight);
           }
         }
         else
         {
-          editCommand.appendEdit(EditCommand.INSERT_GAP,
-                                 new SequenceI[]
-                                 {seq},
-                                 lastres, startres - lastres,
-                                 av.alignment,
-                                 true);
+          editCommand.appendEdit(EditCommand.INSERT_GAP, new SequenceI[]
+          { seq }, lastres, startres - lastres, av.getAlignment(), true);
         }
       }
       else
       {
-        // dragging to the left
-        if (fixedColumns && fixedRight != -1)
+        if (!editSeq)
         {
-          for (int j = lastres; j > startres; j--)
+          // dragging to the left
+          if (fixedColumns && fixedRight != -1)
           {
-            if (!jalview.util.Comparison.isGap(seq.getCharAt(startres)))
+            for (int j = lastres; j > startres; j--)
             {
-              endEditing();
-              break;
+              if (!jalview.util.Comparison.isGap(seq.getCharAt(startres)))
+              {
+                endEditing();
+                break;
+              }
+              deleteChar(startres, new SequenceI[]
+              { seq }, fixedRight);
+            }
+          }
+          else
+          {
+            // could be a keyboard edit trying to delete none gaps
+            int max = 0;
+            for (int m = startres; m < lastres; m++)
+            {
+              if (!jalview.util.Comparison.isGap(seq.getCharAt(m)))
+              {
+                break;
+              }
+              max++;
+            }
+
+            if (max > 0)
+            {
+              editCommand.appendEdit(EditCommand.DELETE_GAP,
+                      new SequenceI[]
+                      { seq }, startres, max, av.getAlignment(), true);
             }
-            deleteChar(startres, new SequenceI[]
-                       {seq}, fixedRight);
           }
         }
         else
-        {
-          //could be a keyboard edit trying to delete none gaps
-          int max = 0;
-          for (int m = startres; m < lastres; m++)
+        {// insertGap==false AND editSeq==TRUE;
+          if (fixedColumns && fixedRight != -1)
           {
-            if (!jalview.util.Comparison.isGap(seq.getCharAt(m)))
+            for (int j = lastres; j < startres; j++)
             {
-              break;
+              insertChar(j, new SequenceI[]
+              { seq }, fixedRight);
             }
-            max++;
           }
-
-          if (max > 0)
+          else
           {
-            editCommand.appendEdit(EditCommand.DELETE_GAP,
-                                   new SequenceI[]
-                                   {seq},
-                                   startres, max,
-                                   av.alignment,
-                                   true);
+            editCommand.appendEdit(EditCommand.INSERT_NUC, new SequenceI[]
+            { seq }, lastres, startres - lastres, av.getAlignment(), true);
           }
         }
       }
@@ -1269,14 +1270,14 @@ public class SeqPanel
     int blankColumn = fixedColumn;
     for (int s = 0; s < seq.length; s++)
     {
-      //Find the next gap before the end of the visible region boundary
-      //If lastCol > j, theres a boundary after the gap insertion
+      // Find the next gap before the end of the visible region boundary
+      // If lastCol > j, theres a boundary after the gap insertion
 
       for (blankColumn = fixedColumn; blankColumn > j; blankColumn--)
       {
         if (jalview.util.Comparison.isGap(seq[s].getCharAt(blankColumn)))
         {
-          //Theres a space, so break and insert the gap
+          // Theres a space, so break and insert the gap
           break;
         }
       }
@@ -1289,34 +1290,31 @@ public class SeqPanel
       }
     }
 
-    editCommand.appendEdit(EditCommand.DELETE_GAP,
-                           seq,
-                           blankColumn, 1, av.alignment, true);
+    editCommand.appendEdit(EditCommand.DELETE_GAP, seq, blankColumn, 1,
+            av.getAlignment(), true);
 
-    editCommand.appendEdit(EditCommand.INSERT_GAP,
-                           seq,
-                           j, 1, av.alignment,
-                           true);
+    editCommand.appendEdit(EditCommand.INSERT_GAP, seq, j, 1,
+            av.getAlignment(), true);
 
   }
 
   void deleteChar(int j, SequenceI[] seq, int fixedColumn)
   {
 
-    editCommand.appendEdit(EditCommand.DELETE_GAP,
-                           seq,
-                           j, 1, av.alignment, true);
+    editCommand.appendEdit(EditCommand.DELETE_GAP, seq, j, 1,
+            av.getAlignment(), true);
 
-    editCommand.appendEdit(EditCommand.INSERT_GAP,
-                           seq,
-                           fixedColumn, 1, av.alignment, true);
+    editCommand.appendEdit(EditCommand.INSERT_GAP, seq, fixedColumn, 1,
+            av.getAlignment(), true);
   }
 
   /**
    * DOCUMENT ME!
-   *
-   * @param e DOCUMENT ME!
+   * 
+   * @param e
+   *          DOCUMENT ME!
    */
+  @Override
   public void mouseEntered(MouseEvent e)
   {
     if (oldSeq < 0)
@@ -1333,9 +1331,11 @@ public class SeqPanel
 
   /**
    * DOCUMENT ME!
-   *
-   * @param e DOCUMENT ME!
+   * 
+   * @param e
+   *          DOCUMENT ME!
    */
+  @Override
   public void mouseExited(MouseEvent e)
   {
     if (av.getWrapAlignment())
@@ -1349,59 +1349,76 @@ public class SeqPanel
     }
   }
 
+  @Override
   public void mouseClicked(MouseEvent evt)
   {
-    SequenceI sequence = av.alignment.getSequenceAt(findSeq(evt));
+    SequenceGroup sg = null;
+    SequenceI sequence = av.getAlignment().getSequenceAt(findSeq(evt));
     if (evt.getClickCount() > 1)
     {
-      if (av.getSelectionGroup().getSize() == 1
-          && av.getSelectionGroup().getEndRes()
-          - av.getSelectionGroup().getStartRes() < 2)
+      sg = av.getSelectionGroup();
+      if (sg != null && sg.getSize() == 1
+              && sg.getEndRes() - sg.getStartRes() < 2)
       {
         av.setSelectionGroup(null);
       }
 
       SequenceFeature[] features = findFeaturesAtRes(
-          sequence.getDatasetSequence(),
-          sequence.findPosition(findRes(evt))
-          );
+              sequence.getDatasetSequence(),
+              sequence.findPosition(findRes(evt)));
 
       if (features != null && features.length > 0)
       {
         SearchResults highlight = new SearchResults();
-        highlight.addResult(sequence,
-                            features[0].getBegin(),
-                            features[0].getEnd());
+        highlight.addResult(sequence, features[0].getBegin(),
+                features[0].getEnd());
         seqCanvas.highlightSearchResults(highlight);
       }
       if (features != null && features.length > 0)
       {
-        seqCanvas.getFeatureRenderer().amendFeatures(
-            new SequenceI[]
-            {sequence}, features, false, ap);
+        seqCanvas.getFeatureRenderer().amendFeatures(new SequenceI[]
+        { sequence }, features, false, ap);
 
         seqCanvas.highlightSearchResults(null);
       }
     }
   }
 
+  @Override
   public void mouseWheelMoved(MouseWheelEvent e)
   {
     e.consume();
-      if (e.getWheelRotation() > 0)
+    if (e.getWheelRotation() > 0)
+    {
+      if (e.isShiftDown())
+      {
+        ap.scrollRight(true);
+
+      }
+      else
       {
         ap.scrollUp(false);
       }
+    }
+    else
+    {
+      if (e.isShiftDown())
+      {
+        ap.scrollRight(false);
+      }
       else
       {
         ap.scrollUp(true);
       }
+    }
+    // TODO Update tooltip for new position.
   }
 
   /**
    * DOCUMENT ME!
-   *
-   * @param evt DOCUMENT ME!
+   * 
+   * @param evt
+   *          DOCUMENT ME!
    */
   public void doMousePressedDefineMode(MouseEvent evt)
   {
@@ -1411,12 +1428,11 @@ public class SeqPanel
 
     startWrapBlock = wrappedBlock;
 
-    if (av.wrapAlignment && seq > av.alignment.getHeight())
+    if (av.wrapAlignment && seq > av.getAlignment().getHeight())
     {
       JOptionPane.showInternalMessageDialog(Desktop.desktop,
-                                            "Cannot edit annotations in wrapped view.",
-                                            "Wrapped view - no edit",
-                                            JOptionPane.WARNING_MESSAGE);
+              MessageManager.getString("label.cannot_edit_annotations_in_wrapped_view"),
+              MessageManager.getString("label.wrapped_view_no_edit"), JOptionPane.WARNING_MESSAGE);
       return;
     }
 
@@ -1425,9 +1441,9 @@ public class SeqPanel
       return;
     }
 
-    SequenceI sequence = (Sequence) av.getAlignment().getSequenceAt(seq);
+    SequenceI sequence = av.getAlignment().getSequenceAt(seq);
 
-    if ( (sequence == null) || (res > sequence.getLength()))
+    if ((sequence == null) || (res > sequence.getLength()))
     {
       return;
     }
@@ -1436,10 +1452,10 @@ public class SeqPanel
 
     if (stretchGroup == null)
     {
-      stretchGroup = av.alignment.findGroup(sequence);
+      stretchGroup = av.getAlignment().findGroup(sequence);
 
-      if ( (stretchGroup != null) && (res > stretchGroup.getStartRes()) &&
-          (res < stretchGroup.getEndRes()))
+      if ((stretchGroup != null) && (res > stretchGroup.getStartRes())
+              && (res < stretchGroup.getEndRes()))
       {
         av.setSelectionGroup(stretchGroup);
       }
@@ -1448,20 +1464,20 @@ public class SeqPanel
         stretchGroup = null;
       }
     }
-    else if (!stretchGroup.getSequences(null).contains(sequence) ||
-             (stretchGroup.getStartRes() > res) ||
-             (stretchGroup.getEndRes() < res))
+    else if (!stretchGroup.getSequences(null).contains(sequence)
+            || (stretchGroup.getStartRes() > res)
+            || (stretchGroup.getEndRes() < res))
     {
       stretchGroup = null;
 
-      SequenceGroup[] allGroups = av.alignment.findAllGroups(sequence);
+      SequenceGroup[] allGroups = av.getAlignment().findAllGroups(sequence);
 
       if (allGroups != null)
       {
         for (int i = 0; i < allGroups.length; i++)
         {
-          if ( (allGroups[i].getStartRes() <= res) &&
-              (allGroups[i].getEndRes() >= res))
+          if ((allGroups[i].getStartRes() <= res)
+                  && (allGroups[i].getEndRes() >= res))
           {
             stretchGroup = allGroups[i];
             break;
@@ -1475,8 +1491,8 @@ public class SeqPanel
 
     if (javax.swing.SwingUtilities.isRightMouseButton(evt))
     {
-      SequenceFeature [] allFeatures = findFeaturesAtRes(sequence.getDatasetSequence(),
-                                               sequence.findPosition(res));
+      SequenceFeature[] allFeatures = findFeaturesAtRes(
+              sequence.getDatasetSequence(), sequence.findPosition(res));
       Vector links = new Vector();
       for (int i = 0; i < allFeatures.length; i++)
       {
@@ -1504,7 +1520,7 @@ public class SeqPanel
 
     if (stretchGroup == null)
     {
-      //Only if left mouse button do we want to change group sizes
+      // Only if left mouse button do we want to change group sizes
 
       // define a new group here
       SequenceGroup sg = new SequenceGroup();
@@ -1512,27 +1528,27 @@ public class SeqPanel
       sg.setEndRes(res);
       sg.addSequence(sequence, false);
       av.setSelectionGroup(sg);
+
       stretchGroup = sg;
 
       if (av.getConservationSelected())
       {
-        SliderPanel.setConservationSlider(ap,
-                                          av.getGlobalColourScheme(),
-                                          "Background");
+        SliderPanel.setConservationSlider(ap, av.getGlobalColourScheme(),
+                "Background");
       }
 
       if (av.getAbovePIDThreshold())
       {
         SliderPanel.setPIDSliderSource(ap, av.getGlobalColourScheme(),
-                                       "Background");
+                "Background");
       }
-      if ( (stretchGroup != null) && (stretchGroup.getEndRes() == res))
+      if ((stretchGroup != null) && (stretchGroup.getEndRes() == res))
       {
         // Edit end res position of selected group
         changeEndRes = true;
       }
-      else if ( (stretchGroup != null) &&
-               (stretchGroup.getStartRes() == res))
+      else if ((stretchGroup != null)
+              && (stretchGroup.getStartRes() == res))
       {
         // Edit end res position of selected group
         changeStartRes = true;
@@ -1545,8 +1561,9 @@ public class SeqPanel
 
   /**
    * DOCUMENT ME!
-   *
-   * @param evt DOCUMENT ME!
+   * 
+   * @param evt
+   *          DOCUMENT ME!
    */
   public void doMouseReleasedDefineMode(MouseEvent evt)
   {
@@ -1555,47 +1572,38 @@ public class SeqPanel
       return;
     }
 
+    stretchGroup.recalcConservation(); // always do this - annotation has own
+                                       // state
     if (stretchGroup.cs != null)
     {
-      if (stretchGroup.cs instanceof ClustalxColourScheme)
-      {
-        ( (ClustalxColourScheme) stretchGroup.cs).resetClustalX(
-            stretchGroup.getSequences(av.hiddenRepSequences),
-            stretchGroup.getWidth());
-      }
-
-      if (stretchGroup.cs instanceof Blosum62ColourScheme
-          || stretchGroup.cs instanceof PIDColourScheme
-          || stretchGroup.cs.conservationApplied()
-          || stretchGroup.cs.getThreshold() > 0)
-      {
-        stretchGroup.recalcConservation();
-      }
+      stretchGroup.cs.alignmentChanged(stretchGroup,
+              av.getHiddenRepSequences());
 
       if (stretchGroup.cs.conservationApplied())
       {
         SliderPanel.setConservationSlider(ap, stretchGroup.cs,
-                                          stretchGroup.getName());
+                stretchGroup.getName());
       }
       else
       {
         SliderPanel.setPIDSliderSource(ap, stretchGroup.cs,
-                                       stretchGroup.getName());
+                stretchGroup.getName());
       }
-      PaintRefresher.Refresh(this, av.getSequenceSetId());
-      ap.paintAlignment(true);
     }
+    PaintRefresher.Refresh(this, av.getSequenceSetId());
+    ap.paintAlignment(true);
 
     changeEndRes = false;
     changeStartRes = false;
     stretchGroup = null;
-
+    av.sendSelection();
   }
 
   /**
    * DOCUMENT ME!
-   *
-   * @param evt DOCUMENT ME!
+   * 
+   * @param evt
+   *          DOCUMENT ME!
    */
   public void doMouseDraggedDefineMode(MouseEvent evt)
   {
@@ -1612,9 +1620,9 @@ public class SeqPanel
       return;
     }
 
-    if (res >= av.alignment.getWidth())
+    if (res >= av.getAlignment().getWidth())
     {
-      res = av.alignment.getWidth() - 1;
+      res = av.getAlignment().getWidth() - 1;
     }
 
     if (stretchGroup.getEndRes() == res)
@@ -1659,7 +1667,8 @@ public class SeqPanel
       dragDirection = -1;
     }
 
-    while ( (y != oldSeq) && (oldSeq > -1) && (y < av.alignment.getHeight()))
+    while ((y != oldSeq) && (oldSeq > -1)
+            && (y < av.getAlignment().getHeight()))
     {
       // This routine ensures we don't skip any sequences, as the
       // selection is quite slow.
@@ -1729,10 +1738,10 @@ public class SeqPanel
   }
 
   // this class allows scrolling off the bottom of the visible alignment
-  class ScrollThread
-      extends Thread
+  class ScrollThread extends Thread
   {
     MouseEvent evt;
+
     boolean running = false;
 
     public ScrollThread()
@@ -1750,6 +1759,7 @@ public class SeqPanel
       running = false;
     }
 
+    @Override
     public void run()
     {
       running = true;
@@ -1758,14 +1768,13 @@ public class SeqPanel
       {
         if (evt != null)
         {
-          if (mouseDragging && (evt.getY() < 0) &&
-              (av.getStartSeq() > 0))
+          if (mouseDragging && (evt.getY() < 0) && (av.getStartSeq() > 0))
           {
             running = ap.scrollUp(true);
           }
 
-          if (mouseDragging && (evt.getY() >= getHeight()) &&
-              (av.alignment.getHeight() > av.getEndSeq()))
+          if (mouseDragging && (evt.getY() >= getHeight())
+                  && (av.getAlignment().getHeight() > av.getEndSeq()))
           {
             running = ap.scrollUp(false);
           }
@@ -1783,11 +1792,109 @@ public class SeqPanel
         try
         {
           Thread.sleep(20);
+        } catch (Exception ex)
+        {
+        }
+      }
+    }
+  }
+
+  /**
+   * modify current selection according to a received message.
+   */
+  @Override
+  public void selection(SequenceGroup seqsel, ColumnSelection colsel,
+          SelectionSource source)
+  {
+    // TODO: fix this hack - source of messages is align viewport, but SeqPanel
+    // handles selection messages...
+    // TODO: extend config options to allow user to control if selections may be
+    // shared between viewports.
+    if (av == source
+            || !av.followSelection
+            || (av.isSelectionGroupChanged(false) || av
+                    .isColSelChanged(false))
+            || (source instanceof AlignViewport && ((AlignViewport) source)
+                    .getSequenceSetId().equals(av.getSequenceSetId())))
+    {
+      return;
+    }
+    // do we want to thread this ? (contention with seqsel and colsel locks, I
+    // suspect)
+    // rules are: colsel is copied if there is a real intersection between
+    // sequence selection
+    boolean repaint = false, copycolsel = true;
+    // if (!av.isSelectionGroupChanged(false))
+    {
+      SequenceGroup sgroup = null;
+      if (seqsel != null && seqsel.getSize() > 0)
+      {
+        if (av.getAlignment() == null)
+        {
+          jalview.bin.Cache.log.warn("alignviewport av SeqSetId="
+                  + av.getSequenceSetId() + " ViewId=" + av.getViewId()
+                  + " 's alignment is NULL! returning immediatly.");
+          return;
+        }
+        sgroup = seqsel.intersect(av.getAlignment(),
+                (av.hasHiddenRows()) ? av.getHiddenRepSequences() : null);
+        if ((sgroup == null || sgroup.getSize() == 0)
+                || (colsel == null || colsel.size() == 0))
+        {
+          // don't copy columns if the region didn't intersect.
+          copycolsel = false;
         }
-        catch (Exception ex)
+      }
+      if (sgroup != null && sgroup.getSize() > 0)
+      {
+        av.setSelectionGroup(sgroup);
+      }
+      else
+      {
+        av.setSelectionGroup(null);
+      }
+      av.isSelectionGroupChanged(true);
+      repaint = true;
+    }
+    if (copycolsel)
+    {
+      // the current selection is unset or from a previous message
+      // so import the new colsel.
+      if (colsel == null || colsel.size() == 0)
+      {
+        if (av.getColumnSelection() != null)
         {
+          av.getColumnSelection().clear();
+          repaint = true;
         }
       }
+      else
+      {
+        // TODO: shift colSel according to the intersecting sequences
+        if (av.getColumnSelection() == null)
+        {
+          av.setColumnSelection(new ColumnSelection(colsel));
+        }
+        else
+        {
+          av.getColumnSelection().setElementsFrom(colsel);
+        }
+      }
+      av.isColSelChanged(true);
+      repaint = true;
+    }
+    if (copycolsel
+            && av.hasHiddenColumns()
+            && (av.getColumnSelection() == null || av.getColumnSelection()
+                    .getHiddenColumns() == null))
+    {
+      System.err.println("Bad things");
+    }
+    if (repaint)
+    {
+      // probably finessing with multiple redraws here
+      PaintRefresher.Refresh(this, av.getSequenceSetId());
+      // ap.paintAlignment(false);
     }
   }
 }