X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fappletgui%2FOverviewPanel.java;h=cbbfcff01821a9d80ba88030fda052f4ed339f7b;hb=7be3a744db5213f49e70178ade126d1cc797c762;hp=366f5bcb196d9e6a8722230379eade6e2c73e8ff;hpb=5cd5b6e7864fe435ceb3f5c2f339a436ea0aac93;p=jalview.git

diff --git a/src/jalview/appletgui/OverviewPanel.java b/src/jalview/appletgui/OverviewPanel.java
index 366f5bc..cbbfcff 100755
--- a/src/jalview/appletgui/OverviewPanel.java
+++ b/src/jalview/appletgui/OverviewPanel.java
@@ -1,6 +1,6 @@
 /*
  * Jalview - A Sequence Alignment Editor and Viewer
- * Copyright (C) 2005 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
+ * Copyright (C) 2006 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
@@ -26,6 +26,7 @@ public class OverviewPanel
     extends Panel implements Runnable, MouseMotionListener, MouseListener
 {
   Image miniMe;
+  Image offscreen;
   AlignViewport av;
   AlignmentPanel ap;
   float scalew = 1f;
@@ -139,7 +140,6 @@ public class OverviewPanel
     boxX = evt.getX();
     boxY = evt.getY();
     checkValid();
-    ap.repaint();
   }
 
   void checkValid()
@@ -189,7 +189,7 @@ public class OverviewPanel
     }
 
     ap.setScrollValues( col, row );
-
+    ap.repaint();
   }
 
   /**
@@ -253,17 +253,19 @@ public class OverviewPanel
     scaleh = (float) sequencesHeight / (float) fullsizeHeight;
 
     miniMe = nullFrame.createImage(width, sequencesHeight + graphHeight);
+    offscreen = nullFrame.createImage(width, sequencesHeight + graphHeight);
 
     Graphics mg = miniMe.getGraphics();
     float sampleCol = (float) alwidth / (float) width;
     float sampleRow = (float) alheight / (float) sequencesHeight;
 
-    int lastcol=-1, lastrow=-1;
+    int lastcol=0, lastrow=0;
+    int xstart=0, ystart=0;
     Color color = Color.yellow;
     int row, col, sameRow = 0, sameCol = 0;
     jalview.datamodel.SequenceI seq;
     boolean hiddenRow = false;
-    for (row = 0; row < sequencesHeight; row++)
+    for (row = 0; row <= sequencesHeight; row++)
     {
       if((int)(row*sampleRow)==lastrow)
       {
@@ -271,8 +273,6 @@ public class OverviewPanel
         continue;
       }
 
-      lastrow = (int)(row*sampleRow);
-
       hiddenRow = false;
       if (av.hasHiddenRows)
       {
@@ -292,12 +292,6 @@ public class OverviewPanel
       else
         seq = av.alignment.getSequenceAt(lastrow);
 
-      if(seq==null)
-      {
-        System.out.println(lastrow+" null");
-        continue;
-      }
-
         for (col = 0; col < width; col++)
         {
           if ( (int) (col * sampleCol) == lastcol && (int) (row * sampleRow) == lastrow)
@@ -329,12 +323,15 @@ public class OverviewPanel
 
           mg.setColor(color);
           if (sameCol == 1 && sameRow == 1)
-            mg.drawLine(col, row, col, row);
+            mg.drawLine(xstart, ystart, xstart, ystart);
           else
-            mg.fillRect(col, row, col+sameCol, col+sameRow);
+            mg.fillRect(xstart, ystart, sameCol, sameRow);
 
+          xstart = col;
           sameCol = 1;
       }
+      lastrow = (int)(row*sampleRow);
+      ystart = row;
       sameRow = 1;
     }
 
@@ -419,9 +416,14 @@ public class OverviewPanel
 
   public void paint(Graphics g)
   {
+    Graphics og = offscreen.getGraphics();
     if (miniMe != null)
     {
-      g.drawImage(miniMe, 0, 0, this);
+      og.drawImage(miniMe, 0, 0, this);
+      og.setColor(Color.red);
+      og.drawRect(boxX, boxY, boxWidth, boxHeight);
+      og.drawRect(boxX + 1, boxY + 1, boxWidth - 2, boxHeight - 2);
+      g.drawImage(offscreen, 0,0, this);
     }
     else
     {
@@ -432,10 +434,6 @@ public class OverviewPanel
       g.drawString("Recalculating", 5, sequencesHeight / 2);
       g.drawString("Overview.....", 5, (sequencesHeight / 2) + 20);
     }
-
-    g.setColor(Color.red);
-    g.drawRect(boxX, boxY, boxWidth, boxHeight);
-    g.drawRect(boxX + 1, boxY + 1, boxWidth - 2, boxHeight - 2);
   }
 
 }