JAL-2600 updates following review

[jalview.git] / src / jalview / gui / ScalePanel.java

diff --git a/src/jalview/gui/ScalePanel.java b/src/jalview/gui/ScalePanel.java
index dcaafcd..e5f2be8 100755 (executable)
--- a/src/jalview/gui/ScalePanel.java
+++ b/src/jalview/gui/ScalePanel.java
@@ -29,6 +29,7 @@ import jalview.renderer.ScaleRenderer.ScaleMark;
 import jalview.util.MessageManager;
 import jalview.util.Platform;
 import jalview.viewmodel.ViewportListenerI;
+import jalview.viewmodel.ViewportRanges;
 
 import java.awt.Color;
 import java.awt.FontMetrics;
@@ -401,20 +402,15 @@ public class ScalePanel extends JPanel implements MouseMotionListener,
     int res = (evt.getX() / av.getCharWidth())
             + av.getRanges().getStartRes();
 
+    reveal = av.getAlignment().getHiddenColumns()
+            .getRegionWithEdgeAtRes(res);
+
     res = av.getAlignment().getHiddenColumns().adjustForHiddenColumns(res);
 
-    for (int[] region : av.getAlignment().getHiddenColumns())
-    {
-      if (res + 1 == region[0] || res - 1 == region[1])
-      {
-        reveal = region;
-        ToolTipManager.sharedInstance().registerComponent(this);
-        this.setToolTipText(
-                MessageManager.getString("label.reveal_hidden_columns"));
-        repaint();
-        return;
-      }
-    }
+    ToolTipManager.sharedInstance().registerComponent(this);
+    this.setToolTipText(
+            MessageManager.getString("label.reveal_hidden_columns"));
+    repaint();
   }
 
   /**
@@ -551,7 +547,16 @@ public class ScalePanel extends JPanel implements MouseMotionListener,
   public void propertyChange(PropertyChangeEvent evt)
   {
     // Respond to viewport change events (e.g. alignment panel was scrolled)
-    repaint();
+    // 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.
+    if (evt.getPropertyName().equals(ViewportRanges.STARTRES))
+    {
+      // scroll event, repaint panel
+      repaint();
+    }
   }
 
 }