From 29b74ec57dfed68ee26a19edfd55987c28870241 Mon Sep 17 00:00:00 2001
From: kiramt <k.mourao@dundee.ac.uk>
Date: Fri, 25 Aug 2017 18:36:26 +0100
Subject: [PATCH] JAL-2587 Removed duplicate events fired to progress bar

---
 src/jalview/renderer/OverviewRenderer.java |   29 ++++++++++++++++++----------
 1 file changed, 19 insertions(+), 10 deletions(-)

diff --git a/src/jalview/renderer/OverviewRenderer.java b/src/jalview/renderer/OverviewRenderer.java
index 416defb..1f3f663 100644
--- a/src/jalview/renderer/OverviewRenderer.java
+++ b/src/jalview/renderer/OverviewRenderer.java
@@ -95,6 +95,7 @@ public class OverviewRenderer
     int totalPixels = miniMe.getWidth() * alignmentHeight;
 
     int lastRowUpdate = 0;
+    int lastUpdate = 0;
     changeSupport.firePropertyChange(UPDATE, -1, 0);
 
     for (int alignmentRow : rows)
@@ -145,8 +146,10 @@ public class OverviewRenderer
             }
           }
 
-          sendProgressUpdate((pixelCol + 1) * (endRow - pixelRow),
-                  totalPixels, lastRowUpdate);
+          // store last update value
+          lastUpdate = sendProgressUpdate(
+                  (pixelCol + 1) * (endRow - pixelRow), totalPixels,
+                  lastRowUpdate, lastUpdate);
           pixelCol = endCol + 1;
         }
         colIndex++;
@@ -154,7 +157,10 @@ public class OverviewRenderer
 
       if (pixelRow != endRow + 1)
       {
-        lastRowUpdate = sendProgressUpdate(endRow + 1, alignmentHeight, 0);
+        // store row offset and last update value
+        lastRowUpdate = sendProgressUpdate(endRow + 1, alignmentHeight, 0,
+                lastUpdate);
+        lastUpdate = lastRowUpdate;
         pixelRow = endRow + 1;
       }
       seqIndex++;
@@ -163,28 +169,31 @@ public class OverviewRenderer
     // final update to progress bar if present
     if (redraw)
     {
-      sendProgressUpdate(pixelRow - 1, alignmentHeight, 0);
+      sendProgressUpdate(pixelRow - 1, alignmentHeight, 0, 0);
     }
     else
     {
-      sendProgressUpdate(alignmentHeight, miniMe.getHeight(), 0);
+      sendProgressUpdate(alignmentHeight, miniMe.getHeight(), 0, 0);
     }
     return miniMe;
   }
 
   /*
    * Calculate progress update value and fire event
+   * @param rowOffset number of rows to offset calculation by
+   * @return new rowOffset - return value only to be used when at end of a row
    */
-  private int sendProgressUpdate(int position, int maximum, int offset)
+  private int sendProgressUpdate(int position, int maximum, int rowOffset,
+          int lastUpdate)
   {
-    int newUpdate = offset
+    int newUpdate = rowOffset
             + Math.round(MAX_PROGRESS * ((float) position / maximum));
-    if (newUpdate > offset)
+    if (newUpdate > lastUpdate)
     {
-      changeSupport.firePropertyChange(UPDATE, offset, newUpdate);
+      changeSupport.firePropertyChange(UPDATE, rowOffset, newUpdate);
       return newUpdate;
     }
-    return offset;
+    return newUpdate;
   }
 
   /*
-- 
1.7.10.2