JAL-3073 select columns if dragging sideways in a graph annotation

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

diff --git a/src/jalview/gui/ScalePanel.java b/src/jalview/gui/ScalePanel.java
index 581fb7d..6a44d06 100755 (executable)
--- a/src/jalview/gui/ScalePanel.java
+++ b/src/jalview/gui/ScalePanel.java
@@ -35,6 +35,7 @@ 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;
@@ -266,10 +267,10 @@ 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)
@@ -277,19 +278,15 @@ public class ScalePanel extends JPanel
     mouseDragging = false;
     ap.getSeqPanel().stopScrolling();
 
+    // todo res calculation should be a method on AlignViewport
     int res = (evt.getX() / 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)
     {
@@ -363,14 +360,16 @@ public class ScalePanel extends JPanel
 
   /**
    * Action on leaving the panel bounds with mouse drag in progress is to start
-   * scrolling the alignment in the direction of the mouse
+   * 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().startScrolling(evt.getPoint());
+      ap.getSeqPanel().startScrolling(new Point(evt.getX(), 0));
     }
   }