X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FOverviewCanvas.java;h=470fd643df5bd9e41031493993f656e3e901f4dc;hb=57738a1f3c19b1c3a00bd3ac5108f8cd0af32f99;hp=2991889bb8a6e4ac09d7764dfdaff0058d53682e;hpb=7e441a4a9594821ec56539b29cb3b8a13bfa3c65;p=jalview.git

diff --git a/src/jalview/gui/OverviewCanvas.java b/src/jalview/gui/OverviewCanvas.java
index 2991889..470fd64 100644
--- a/src/jalview/gui/OverviewCanvas.java
+++ b/src/jalview/gui/OverviewCanvas.java
@@ -25,15 +25,16 @@ import jalview.bin.Cache;
 import jalview.renderer.OverviewRenderer;
 import jalview.renderer.OverviewResColourFinder;
 import jalview.viewmodel.OverviewDimensions;
+import jalview.viewmodel.seqfeatures.FeatureRendererModel;
 
 import java.awt.Color;
 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);
 
@@ -132,7 +133,7 @@ public class OverviewCanvas extends JComponent
    *          the renderer to transfer feature colouring from
    */
   public void draw(boolean showSequenceFeatures, boolean showAnnotation,
-          FeatureRenderer transferRenderer)
+          FeatureRendererModel transferRenderer)
   {
     miniMe = null;
 
@@ -157,11 +158,9 @@ 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;
@@ -208,7 +207,8 @@ 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());
@@ -249,16 +249,16 @@ public class OverviewCanvas extends JComponent
     {
       g.drawImage(lastMiniMe, 0, 0, getWidth(), getHeight(), this);
     }
-    
+
     // draw the box
     g.setColor(Color.red);
     od.drawBox(g);
   }
 
-
   public void dispose()
   {
     dispose = true;
+    od = null;
     synchronized (this)
     {
       restart = true;