X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FScalePanel.java;h=0f2b765c189909e86f0619457503b4970c52d57f;hb=7e00183505bd4c58d1ce62ee121ed372c3b058f2;hp=9788ec6d5dee256bfa1711c30b8249160b13337e;hpb=bc18effe68ba80213a6d03ca7e6175adc6be71d6;p=jalview.git

diff --git a/src/jalview/gui/ScalePanel.java b/src/jalview/gui/ScalePanel.java
index 9788ec6..0f2b765 100755
--- a/src/jalview/gui/ScalePanel.java
+++ b/src/jalview/gui/ScalePanel.java
@@ -34,6 +34,7 @@ import java.awt.Color;
 import java.awt.FontMetrics;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
+import java.awt.Point;
 import java.awt.RenderingHints;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
@@ -265,31 +266,26 @@ public class ScalePanel extends JPanel
   }
 
   /**
-   * DOCUMENT ME!
+   * Action on mouseUp is to set the limit of the current selection group (if
+   * there is one) and broadcast the selection
    * 
    * @param evt
-   *          DOCUMENT ME!
    */
   @Override
   public void mouseReleased(MouseEvent evt)
   {
     mouseDragging = false;
+    ap.getSeqPanel().stopScrolling();
 
     int xCords = Math.max(0, evt.getX()); // prevent negative X coordinates
-
     int res = (xCords / av.getCharWidth())
             + av.getRanges().getStartRes();
-
     if (av.hasHiddenColumns())
     {
       res = av.getAlignment().getHiddenColumns()
               .visibleToAbsoluteColumn(res);
     }
-
-    if (res >= av.getAlignment().getWidth())
-    {
-      res = av.getAlignment().getWidth() - 1;
-    }
+    res = Math.min(res, av.getAlignment().getWidth() - 1);
 
     if (!stretchingGroup)
     {
@@ -362,16 +358,22 @@ public class ScalePanel extends JPanel
   {
     if (mouseDragging)
     {
-      ap.getSeqPanel().scrollCanvas(null);
+      ap.getSeqPanel().stopScrolling();
     }
   }
 
+  /**
+   * Action on leaving the panel bounds with mouse drag in progress is to start
+   * scrolling the alignment in the direction of the mouse. To restrict
+   * scrolling to left-right (not up-down), the y-value of the mouse position is
+   * replaced with zero.
+   */
   @Override
   public void mouseExited(MouseEvent evt)
   {
     if (mouseDragging)
     {
-      ap.getSeqPanel().scrollCanvas(evt);
+      ap.getSeqPanel().startScrolling(new Point(evt.getX(), 0));
     }
   }