X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FOverviewCanvas.java;h=ca27a9cfb77322252f0630735638ea289b7a096c;hb=cb597de858c70703321daa67adef5089957e9f55;hp=de16b00424fb269943b39a688c373646bff48277;hpb=710b4dbd18b7ec764ba8c24d173371541f65297d;p=jalview.git

diff --git a/src/jalview/gui/OverviewCanvas.java b/src/jalview/gui/OverviewCanvas.java
index de16b00..ca27a9c 100644
--- a/src/jalview/gui/OverviewCanvas.java
+++ b/src/jalview/gui/OverviewCanvas.java
@@ -31,9 +31,9 @@ import java.awt.Dimension;
 import java.awt.Graphics;
 import java.awt.image.BufferedImage;
 
-import javax.swing.JComponent;
+import javax.swing.JPanel;
 
-public class OverviewCanvas extends JComponent
+public class OverviewCanvas extends JPanel
 {
   private static final Color TRANS_GREY = new Color(100, 100, 100, 25);
 
@@ -157,11 +157,9 @@ public class OverviewCanvas extends JComponent
     {
       mg.translate(0, od.getSequencesHeight());
       or.drawGraph(mg, av.getAlignmentConservationAnnotation(),
-              av.getCharWidth(), od.getGraphHeight(),
-              od.getColumns(av.getAlignment()));
+              od.getGraphHeight(), od.getColumns(av.getAlignment()));
       mg.translate(0, -od.getSequencesHeight());
     }
-    System.gc();
 
     or.removePropertyChangeListener(progressPanel);
     or = null;
@@ -183,7 +181,7 @@ public class OverviewCanvas extends JComponent
   @Override
   public void paintComponent(Graphics g)
   {
-    // super.paintComponent(g);
+    //super.paintComponent(g);
 
     if (restart)
     {
@@ -208,7 +206,9 @@ public class OverviewCanvas extends JComponent
       {
         // if there is annotation, scale the alignment and annotation
         // separately
-        if (od.getGraphHeight() > 0)
+        if (od.getGraphHeight() > 0 
+        		&& od.getSequencesHeight() > 0  // BH 2019
+        		)
         {
           BufferedImage topImage = lastMiniMe.getSubimage(0, 0,
                   od.getWidth(), od.getSequencesHeight());