From: kiramt <k.mourao@dundee.ac.uk>
Date: Wed, 28 Jun 2017 11:49:17 +0000 (+0100)
Subject: JAL-2600 Tidies
X-Git-Tag: Release_2_10_3b1~183^2^2
X-Git-Url: http://source.jalview.org/gitweb/?a=commitdiff_plain;h=refs%2Fheads%2Fbug%2FJAL-2600resizeflicker;p=jalview.git

JAL-2600 Tidies
---

diff --git a/src/jalview/appletgui/SeqCanvas.java b/src/jalview/appletgui/SeqCanvas.java
index 469dec9..e996622 100755
--- a/src/jalview/appletgui/SeqCanvas.java
+++ b/src/jalview/appletgui/SeqCanvas.java
@@ -884,13 +884,14 @@ public class SeqCanvas extends Panel implements ViewportListenerI
         // larger than the visible window
         ViewportRanges vpRanges = av.getRanges();
         scrollX = (int) evt.getNewValue() - (int) evt.getOldValue();
-        if (scrollX > vpRanges.getEndRes() - vpRanges.getStartRes())
+        int range = vpRanges.getEndRes() - vpRanges.getStartRes();
+        if (scrollX > range)
         {
-          scrollX = vpRanges.getEndRes() - vpRanges.getStartRes();
+          scrollX = range;
         }
-        else if (scrollX < vpRanges.getStartRes() - vpRanges.getEndRes())
+        else if (scrollX < -range)
         {
-          scrollX = vpRanges.getStartRes() - vpRanges.getEndRes();
+          scrollX = -range;
         }
       }
 
diff --git a/src/jalview/gui/SeqCanvas.java b/src/jalview/gui/SeqCanvas.java
index d8b3f2a..f392810 100755
--- a/src/jalview/gui/SeqCanvas.java
+++ b/src/jalview/gui/SeqCanvas.java
@@ -999,13 +999,14 @@ public class SeqCanvas extends JComponent implements ViewportListenerI
         // larger than the visible window
         ViewportRanges vpRanges = av.getRanges();
         scrollX = (int) evt.getNewValue() - (int) evt.getOldValue();
-        if (scrollX > vpRanges.getEndRes() - vpRanges.getStartRes())
+        int range = vpRanges.getEndRes() - vpRanges.getStartRes();
+        if (scrollX > range)
         {
-          scrollX = vpRanges.getEndRes() - vpRanges.getStartRes();
+          scrollX = range;
         }
-        else if (scrollX < vpRanges.getStartRes() - vpRanges.getEndRes())
+        else if (scrollX < -range)
         {
-          scrollX = vpRanges.getStartRes() - vpRanges.getEndRes();
+          scrollX = -range;
         }
       }