X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FSeqCanvas.java;h=2a9c7048e29652f25df69b056a1af880ecf798a1;hb=1750fec5e3d2a9c626481fac2b7f20fb2812db48;hp=6c6e87aab6b53423bede578e2e37c559db0f0a49;hpb=d6ab1d005a0adbdf4997842893796cbef56b0f53;p=jalview.git

diff --git a/src/jalview/gui/SeqCanvas.java b/src/jalview/gui/SeqCanvas.java
index 6c6e87a..2a9c704 100755
--- a/src/jalview/gui/SeqCanvas.java
+++ b/src/jalview/gui/SeqCanvas.java
@@ -838,10 +838,12 @@ public class SeqCanvas extends JComponent implements ViewportListenerI
        * white fill region of scale above and hidden column markers
        * (to support incremental fast paint of image)
        */
+      g.translate(labelWidthWest, 0);
       g.setColor(Color.white);
       g.fillRect(0, ypos - wrappedSpaceAboveAlignment, viewportWidth
               * charWidth + labelWidthWest, wrappedSpaceAboveAlignment);
       g.setColor(Color.black);
+      g.translate(-labelWidthWest, 0);
 
       g.translate(labelWidthWest, 0);
 
@@ -1656,48 +1658,50 @@ public class SeqCanvas extends JComponent implements ViewportListenerI
     {
       fastPaint = true;
       repaint();
+      return;
     }
-    else if (eventName.equals(ViewportRanges.STARTRES))
+
+    int scrollX = 0;
+    if (eventName.equals(ViewportRanges.STARTRES))
     {
-      int scrollX = 0;
-      if (eventName.equals(ViewportRanges.STARTRES))
+      // Make sure we're not trying to draw a panel
+      // larger than the visible window
+      ViewportRanges vpRanges = av.getRanges();
+      scrollX = (int) evt.getNewValue() - (int) evt.getOldValue();
+      int range = vpRanges.getViewportWidth();
+      if (scrollX > range)
       {
-        // Make sure we're not trying to draw a panel
-        // larger than the visible window
-        ViewportRanges vpRanges = av.getRanges();
-        scrollX = (int) evt.getNewValue() - (int) evt.getOldValue();
-        int range = vpRanges.getEndRes() - vpRanges.getStartRes() + 1;
-        if (scrollX > range)
-        {
-          scrollX = range;
-        }
-        else if (scrollX < -range)
-        {
-          scrollX = -range;
-        }
+        scrollX = range;
+      }
+      else if (scrollX < -range)
+      {
+        scrollX = -range;
+      }
+    }
 
-        // Both scrolling and resizing change viewport ranges: scrolling changes
-        // both start and end points, but resize only changes end values.
-        // Here we only want to fastpaint on a scroll, with resize using a normal
-        // paint, so scroll events are identified as changes to the horizontal or
-        // vertical start value.
-        
-        // scroll - startres and endres both change
-  	  if (av.getWrapAlignment())
-        {
-          fastPaintWrapped(scrollX);
-        }
-        else
-        {
-          fastPaint(scrollX, 0);
-        }
+    // Both scrolling and resizing change viewport ranges: scrolling changes
+    // both start and end points, but resize only changes end values.
+    // Here we only want to fastpaint on a scroll, with resize using a normal
+    // paint, so scroll events are identified as changes to the horizontal or
+    // vertical start value.
+
+    // scroll - startres and endres both change
+    if (eventName.equals(ViewportRanges.STARTRES))
+    {
+      if (av.getWrapAlignment())
+      {
+        fastPaintWrapped(scrollX);
       }
-      else if (eventName.equals(ViewportRanges.STARTSEQ))
+      else
       {
-        // scroll
-        fastPaint(0, (int) evt.getNewValue() - (int) evt.getOldValue());
+        fastPaint(scrollX, 0);
       }
     }
+    else if (eventName.equals(ViewportRanges.STARTSEQ))
+    {
+      // scroll
+      fastPaint(0, (int) evt.getNewValue() - (int) evt.getOldValue());
+    }
   }
 
   /**