X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FIdCanvas.java;h=5ce36cb108d045f85461d3af816b491823b753ba;hb=331cd27699e0303dd42fd01e293f5fae9445e125;hp=1b79f540ce31cde0f763ff2d299df7682c088480;hpb=d1707d4c26db76cfeb640f0dbeb3e3427fd40eb7;p=jalview.git

diff --git a/src/jalview/gui/IdCanvas.java b/src/jalview/gui/IdCanvas.java
index 1b79f54..5ce36cb 100755
--- a/src/jalview/gui/IdCanvas.java
+++ b/src/jalview/gui/IdCanvas.java
@@ -21,6 +21,7 @@
 package jalview.gui;
 
 import jalview.datamodel.SequenceI;
+import jalview.viewmodel.ViewportListenerI;
 import jalview.viewmodel.ViewportRanges;
 
 import java.awt.BorderLayout;
@@ -31,6 +32,7 @@ import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.RenderingHints;
 import java.awt.image.BufferedImage;
+import java.beans.PropertyChangeEvent;
 import java.util.List;
 
 import javax.swing.JPanel;
@@ -41,7 +43,7 @@ import javax.swing.JPanel;
  * @author $author$
  * @version $Revision$
  */
-public class IdCanvas extends JPanel
+public class IdCanvas extends JPanel implements ViewportListenerI
 {
   protected AlignViewport av;
 
@@ -80,6 +82,7 @@ public class IdCanvas extends JPanel
     setLayout(new BorderLayout());
     this.av = av;
     PaintRefresher.Register(this, av.getSequenceSetId());
+    av.getRanges().addPropertyChangeListener(this);
   }
 
   /**
@@ -516,4 +519,15 @@ public class IdCanvas extends JPanel
   {
     this.idfont = idfont;
   }
+
+  @Override
+  public void propertyChange(PropertyChangeEvent evt)
+  {
+    // Respond to viewport range changes (e.g. alignment panel was scrolled)
+    if (evt.getPropertyName().equals("startseq")
+            || evt.getPropertyName().equals("endseq"))
+    {
+      fastPaint((int) evt.getNewValue() - (int) evt.getOldValue());
+    }
+  }
 }