From b79022c537bbad882b8a53c1014f5840432cd28e Mon Sep 17 00:00:00 2001
From: Jim Procter <jprocter@issues.jalview.org>
Date: Fri, 6 May 2016 14:51:38 +0100
Subject: [PATCH] JAL-192 JAL-2099 factored out calculation from rendering
 code #1

---
 src/jalview/gui/ScalePanel.java |   49 ++++++++++++++++++++++++++++-----------
 1 file changed, 35 insertions(+), 14 deletions(-)

diff --git a/src/jalview/gui/ScalePanel.java b/src/jalview/gui/ScalePanel.java
index 108bf24..14ce3fe 100755
--- a/src/jalview/gui/ScalePanel.java
+++ b/src/jalview/gui/ScalePanel.java
@@ -35,6 +35,8 @@ import java.awt.event.ActionListener;
 import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
 import java.awt.event.MouseMotionListener;
+import java.util.ArrayList;
+import java.util.List;
 
 import javax.swing.JMenuItem;
 import javax.swing.JPanel;
@@ -549,12 +551,13 @@ public class ScalePanel extends JPanel implements MouseMotionListener,
     {
       scalestartx += 5;
     }
-
+    List<Object[]> marks = new ArrayList<Object[]>();
     String string;
     int maxX = 0, refN, iadj;
     // todo: add a 'reference origin column' to set column number relative to
     for (int i = scalestartx; i < endx; i += 5)
     {
+      Object[] amark = new Object[3];
       if (((i - refSp) % 10) == 0)
       {
         if (refSeq == null)
@@ -582,26 +585,44 @@ public class ScalePanel extends JPanel implements MouseMotionListener,
             string = String.valueOf(refN) + refSeq.getCharAt(iadj);
           }
         }
-        if ((i - startx - 1) * avCharWidth > maxX)
+        amark[0] = Boolean.TRUE;
+        amark[1] = Integer.valueOf(i - startx - 1);
+        amark[2] = string;
+
+      }
+      else
+      {
+        amark[0] = Boolean.FALSE;
+        amark[1] = Integer.valueOf(i - startx - 1);
+        amark[2] = null;
+      }
+      marks.add(amark);
+    }
+    maxX=0;
+    for (Object[] mark : marks)
+    {
+      boolean major = Boolean.valueOf((Boolean) mark[0]);
+      int mpos = ((Integer) mark[1]).intValue(); // (i - startx - 1)
+      String mstring = (String) mark[2];
+      if (mstring != null)
+      {
+        if (mpos * avCharWidth > maxX)
         {
-          gg.drawString(string, (i - startx - 1) * avCharWidth, y);
-          maxX = (i - startx + 1) * avCharWidth + fm.stringWidth(string);
+          gg.drawString(mstring, mpos * avCharWidth, y);
+          maxX = (mpos + 2) * avCharWidth + fm.stringWidth(mstring);
         }
-
-        gg.drawLine(((i - startx - 1) * avCharWidth) + (avCharWidth / 2),
-                y + 2,
-                ((i - startx - 1) * avCharWidth) + (avCharWidth / 2), y
-                        + (yOf * 2));
+      }
+      if (major)
+      {
+        gg.drawLine((mpos * avCharWidth) + (avCharWidth / 2), y + 2,
+                (mpos * avCharWidth) + (avCharWidth / 2), y + (yOf * 2));
       }
       else
       {
-        gg.drawLine(((i - startx - 1) * avCharWidth) + (avCharWidth / 2), y
-                + yOf,
-                ((i - startx - 1) * avCharWidth) + (avCharWidth / 2), y
-                        + (yOf * 2));
+        gg.drawLine((mpos * avCharWidth) + (avCharWidth / 2), y + yOf,
+                (mpos * avCharWidth) + (avCharWidth / 2), y + (yOf * 2));
       }
     }
-
     if (av.hasHiddenColumns())
     {
       if (reveal != null && reveal[0] > startx && reveal[0] < endx)
-- 
1.7.10.2