From b5314c58801cb255ba1e0d73f1bab834a6a0342d Mon Sep 17 00:00:00 2001
From: amwaterhouse <Andrew Waterhouse>
Date: Thu, 8 Sep 2005 15:49:27 +0000
Subject: [PATCH] Optimise switch to fastPaint

---
 src/jalview/gui/AlignmentPanel.java |   36 +++++++++++++++++++++++++----------
 1 file changed, 26 insertions(+), 10 deletions(-)

diff --git a/src/jalview/gui/AlignmentPanel.java b/src/jalview/gui/AlignmentPanel.java
index 19f50d0..fae6dfc 100755
--- a/src/jalview/gui/AlignmentPanel.java
+++ b/src/jalview/gui/AlignmentPanel.java
@@ -304,10 +304,18 @@ public class AlignmentPanel extends GAlignmentPanel
         hscroll.setVisible(!wrap);
         idwidthAdjuster.setVisible(!wrap);
 
-        av.setShowAnnotation(!wrap);
-        annotationScroller.setVisible(!wrap);
-        annotationSpaceFillerHolder.setVisible(!wrap);
-        idSpaceFillerPanel1.setVisible(!wrap);
+       if(wrap)
+       {
+         annotationScroller.setVisible(false);
+         annotationSpaceFillerHolder.setVisible(false);
+       }
+       else if(av.showAnnotation)
+       {
+         annotationScroller.setVisible(true);
+         annotationSpaceFillerHolder.setVisible(true);
+       }
+
+       idSpaceFillerPanel1.setVisible(!wrap);
 
         repaint();
     }
@@ -433,6 +441,7 @@ public class AlignmentPanel extends GAlignmentPanel
      */
     public void adjustmentValueChanged(AdjustmentEvent evt)
     {
+
         int oldX = av.getStartRes();
         int oldY = av.getStartSeq();
 
@@ -467,21 +476,28 @@ public class AlignmentPanel extends GAlignmentPanel
             overviewPanel.setBoxPosition();
         }
 
-        if (av.getWrapAlignment() || !fastPaint)
+        int xShift = av.getStartRes() - oldX;
+        int yShift = av.getStartSeq() - oldY;
+
+        if ( (xShift == 0 && yShift == 0) ||
+            (Math.abs(xShift) > av.getEndRes() - av.getStartRes()
+             || Math.abs(yShift) > av.getEndSeq() - av.getStartSeq())
+             || av.getWrapAlignment()
+             || !fastPaint)
         {
-            repaint();
+          // Either no shift at all, or shift greater than visible amount
+          repaint();
         }
         else
         {
-            idPanel.idCanvas.fastPaint(av.getStartSeq() - oldY);
-            seqPanel.seqCanvas.fastPaint(av.getStartRes() - oldX,
-                av.getStartSeq() - oldY);
+            idPanel.idCanvas.fastPaint(yShift);
+            seqPanel.seqCanvas.fastPaint(xShift, yShift);
 
             scalePanel.repaint();
 
             if (av.getShowAnnotation())
             {
-                annotationPanel.fastPaint(av.getStartRes() - oldX);
+                annotationPanel.fastPaint(xShift);
             }
         }
     }
-- 
1.7.10.2