JAL-2665 Added sequence group update event.

[jalview.git] / src / jalview / datamodel / SequenceGroup.java

diff --git a/src/jalview/datamodel/SequenceGroup.java b/src/jalview/datamodel/SequenceGroup.java
index 46c802f..06cdec4 100755 (executable)
--- a/src/jalview/datamodel/SequenceGroup.java
+++ b/src/jalview/datamodel/SequenceGroup.java
@@ -27,6 +27,8 @@ import jalview.renderer.ResidueShaderI;
 import jalview.schemes.ColourSchemeI;
 
 import java.awt.Color;
+import java.beans.PropertyChangeListener;
+import java.beans.PropertyChangeSupport;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
@@ -39,6 +41,26 @@ import java.util.Map;
  */
 public class SequenceGroup implements AnnotatedCollectionI
 {
+  // TODO ideally this event notification functionality should be separated into
+  // a
+  // subclass of ViewportProperties similarly to ViewportRanges. Done here as
+  // quick fix for JAL-2665
+  public static final String SEQ_GROUP_CHANGED = "Sequence group changed";
+
+  protected PropertyChangeSupport changeSupport = new PropertyChangeSupport(
+          this);
+
+  public void addPropertyChangeListener(PropertyChangeListener listener)
+  {
+    changeSupport.addPropertyChangeListener(listener);
+  }
+
+  public void removePropertyChangeListener(PropertyChangeListener listener)
+  {
+    changeSupport.removePropertyChangeListener(listener);
+  }
+  // end of event notification functionality initialisation
+
   String groupName;
 
   String description;
@@ -495,7 +517,10 @@ public class SequenceGroup implements AnnotatedCollectionI
     {
       if (s != null && !sequences.contains(s))
       {
+        List<SequenceI> before = sequences;
         sequences.add(s);
+        changeSupport.firePropertyChange(SEQ_GROUP_CHANGED, before,
+                sequences);
       }
 
       if (recalc)
@@ -688,7 +713,10 @@ public class SequenceGroup implements AnnotatedCollectionI
   {
     synchronized (sequences)
     {
+      List<SequenceI> before = sequences;
       sequences.remove(s);
+      changeSupport.firePropertyChange(SEQ_GROUP_CHANGED, before,
+              sequences);
 
       if (recalc)
       {
@@ -725,7 +753,9 @@ public class SequenceGroup implements AnnotatedCollectionI
    */
   public void setStartRes(int i)
   {
+    int before = startRes;
     startRes = i;
+    changeSupport.firePropertyChange(SEQ_GROUP_CHANGED, before, startRes);
   }
 
   /**
@@ -735,7 +765,9 @@ public class SequenceGroup implements AnnotatedCollectionI
    */
   public void setEndRes(int i)
   {
+    int before = endRes;
     endRes = i;
+    changeSupport.firePropertyChange(SEQ_GROUP_CHANGED, before, endRes);
   }
 
   /**
@@ -1344,7 +1376,10 @@ public class SequenceGroup implements AnnotatedCollectionI
   {
     synchronized (sequences)
     {
+      List<SequenceI> before = sequences;
       sequences.clear();
+      changeSupport.firePropertyChange(SEQ_GROUP_CHANGED, before,
+              sequences);
     }
   }