From 0cad98dc5574937f462867526318fc5a94fc2eea Mon Sep 17 00:00:00 2001
From: hansonr <hansonr@STO24954W.ad.stolaf.edu>
Date: Mon, 29 Jul 2019 15:33:47 -0500
Subject: [PATCH] JAL-3383 JAL-3253-applet ScalePanel bug -- should not have
 to cause an AlignmentPanel repaint as a result of an
 Overview range change.

---
 src/jalview/gui/ScalePanel.java |   45 +++++++++++++++++++++++++--------------
 1 file changed, 29 insertions(+), 16 deletions(-)

diff --git a/src/jalview/gui/ScalePanel.java b/src/jalview/gui/ScalePanel.java
index f525100..aa58a88 100755
--- a/src/jalview/gui/ScalePanel.java
+++ b/src/jalview/gui/ScalePanel.java
@@ -54,6 +54,7 @@ import javax.swing.ToolTipManager;
  * The panel containing the sequence ruler (when not in wrapped mode), and
  * supports a range of mouse operations to select, hide or reveal columns.
  */
+@SuppressWarnings("serial")
 public class ScalePanel extends JPanel
         implements MouseMotionListener, MouseListener, ViewportListenerI
 {
@@ -187,7 +188,8 @@ public class ScalePanel extends JPanel
       });
       pop.add(item);
 
-      if (av.getAlignment().getHiddenColumns().hasMultiHiddenColumnRegions())
+      if (av.getAlignment().getHiddenColumns()
+              .hasMultiHiddenColumnRegions())
       {
         item = new JMenuItem(MessageManager.getString("action.reveal_all"));
         item.addActionListener(new ActionListener()
@@ -287,8 +289,7 @@ public class ScalePanel extends JPanel
     // todo res calculation should be a method on AlignViewport
     int xCords = Math.max(0, evt.getX()); // prevent negative X coordinates
     ViewportRanges ranges = av.getRanges();
-    int res = (xCords / av.getCharWidth())
-            + ranges.getStartRes();
+    int res = (xCords / av.getCharWidth()) + ranges.getStartRes();
     res = Math.min(res, ranges.getEndRes());
     if (av.hasHiddenColumns())
     {
@@ -435,7 +436,8 @@ public class ScalePanel extends JPanel
   @Override
   public void paintComponent(Graphics g)
   {
-    //super.paintComponent(g);  // BH 2019
+
+    // super.paintComponent(g); // BH 2019
 
     /*
      * shouldn't get called in wrapped mode as the scale above is
@@ -523,10 +525,11 @@ public class ScalePanel extends JPanel
 
           gg.fillPolygon(
                   new int[]
-          { -1 + res * avCharWidth - avCharHeight / 4,
-              -1 + res * avCharWidth + avCharHeight / 4,
-              -1 + res * avCharWidth }, new int[]
-          { y, y, y + 2 * yOf }, 3);
+                  { -1 + res * avCharWidth - avCharHeight / 4,
+                      -1 + res * avCharWidth + avCharHeight / 4,
+                      -1 + res * avCharWidth },
+                  new int[]
+                  { y, y, y + 2 * yOf }, 3);
         }
       }
     }
@@ -572,16 +575,26 @@ public class ScalePanel extends JPanel
     // 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.
-    if (evt.getPropertyName().equals(ViewportRanges.STARTRES)
-            || evt.getPropertyName().equals(ViewportRanges.STARTRESANDSEQ)
-            || evt.getPropertyName().equals(ViewportRanges.MOVE_VIEWPORT))
+    switch (evt.getPropertyName())
     {
+    case ViewportRanges.STARTRES:
+    case ViewportRanges.STARTRESANDSEQ:
+    case ViewportRanges.MOVE_VIEWPORT:
       // scroll event, repaint panel
-    	
-  	// Call repaint on alignment panel so that repaints from other alignment
-    // panel components can be aggregated. Otherwise performance of the overview
-    // window and others may be adversely affected.
-      av.getAlignPanel().repaint();
+      // TODO: check this?
+      // BH: This is actually quite strange. AlignmentPanel is taking care of
+      // all of
+      // this with fast paint, so why indirectly trigger a repaint from the
+      // ScalePanel?
+
+      // Call repaint on alignment panel so that repaints from other alignment
+      // panel components can be aggregated. Otherwise performance of the
+      // overview
+      // window and others may be adversely affected.
+      // av.getAlignPanel().repaint();
+      System.out.println("ScalePanel propertyChange disabled "
+              + evt.getPropertyName());
+      break;
     }
   }
 
-- 
1.7.10.2