From 78f929d85e95b6445f7fab46504abc394d8c3fe9 Mon Sep 17 00:00:00 2001
From: jprocter <Jim Procter>
Date: Mon, 14 Feb 2011 12:58:37 +0000
Subject: [PATCH] JAL-769

---
 src/jalview/appletgui/AlignFrame.java       |    2 +
 src/jalview/appletgui/AnnotationLabels.java |   69 +++++++++++++++++++++++++--
 2 files changed, 66 insertions(+), 5 deletions(-)

diff --git a/src/jalview/appletgui/AlignFrame.java b/src/jalview/appletgui/AlignFrame.java
index 1997264..f7cfba0 100755
--- a/src/jalview/appletgui/AlignFrame.java
+++ b/src/jalview/appletgui/AlignFrame.java
@@ -210,6 +210,8 @@ public class AlignFrame extends EmbmenuFrame implements ActionListener,
     {
     case 27: // escape key
       deselectAllSequenceMenuItem_actionPerformed();
+      
+      alignPanel.alabels.cancelDrag(); 
       break;
     case KeyEvent.VK_X:
       if (evt.isControlDown() || evt.isMetaDown())
diff --git a/src/jalview/appletgui/AnnotationLabels.java b/src/jalview/appletgui/AnnotationLabels.java
index 2344719..27c579a 100755
--- a/src/jalview/appletgui/AnnotationLabels.java
+++ b/src/jalview/appletgui/AnnotationLabels.java
@@ -23,7 +23,6 @@ import java.awt.*;
 import java.awt.event.*;
 import java.awt.image.BufferedImage;
 
-
 import jalview.datamodel.*;
 
 public class AnnotationLabels extends Panel implements ActionListener,
@@ -224,7 +223,6 @@ public class AnnotationLabels extends Panel implements ActionListener,
   public void mouseMoved(MouseEvent evt)
   {
     resizePanel = evt.getY() < 10 && evt.getX() < 14;
-
     int row = getSelectedRow(evt.getY() + scrollOffset);
 
     if (row > -1)
@@ -246,13 +244,34 @@ public class AnnotationLabels extends Panel implements ActionListener,
     {
       tooltip.setTip("");
     }
-
   }
 
+  /**
+   * curent drag position
+   */
   MouseEvent dragEvent = null;
 
+  /**
+   * flag to indicate drag events should be ignored
+   */
+  private boolean dragCancelled = false;
+
+  /**
+   * clear any drag events in progress
+   */
+  public void cancelDrag()
+  {
+    dragEvent = null;
+    dragCancelled = true;
+  }
+
   public void mouseDragged(MouseEvent evt)
   {
+    if (dragCancelled)
+    {
+      return;
+    }
+    ;
     dragEvent = evt;
 
     if (resizePanel)
@@ -285,6 +304,22 @@ public class AnnotationLabels extends Panel implements ActionListener,
     }
     else
     {
+      int diff;
+      if ((diff = 6 - evt.getY()) > 0)
+      {
+        // nudge scroll up
+        ap.apvscroll.setValue(ap.apvscroll.getValue() - diff);
+        ap.adjustmentValueChanged(null);
+
+      }
+      else if ((0 < (diff = 6
+              - ap.annotationSpaceFillerHolder.getSize().height
+              + evt.getY())))
+      {
+        // nudge scroll down
+        ap.apvscroll.setValue(ap.apvscroll.getValue() + diff);
+        ap.adjustmentValueChanged(null);
+      }
       repaint();
     }
   }
@@ -295,8 +330,31 @@ public class AnnotationLabels extends Panel implements ActionListener,
 
   public void mouseReleased(MouseEvent evt)
   {
+    if (!dragCancelled)
+    {
+      int start = selectedRow;
+
+      int end = getSelectedRow(evt.getY() + scrollOffset);
+
+      if (start != end)
+      {
+        // Swap these annotations
+        AlignmentAnnotation startAA = ap.av.alignment
+                .getAlignmentAnnotation()[start];
+        if (end == -1)
+        {
+          end = ap.av.alignment.getAlignmentAnnotation().length - 1;
+        }
+        AlignmentAnnotation endAA = ap.av.alignment
+                .getAlignmentAnnotation()[end];
+
+        ap.av.alignment.getAlignmentAnnotation()[end] = startAA;
+        ap.av.alignment.getAlignmentAnnotation()[start] = endAA;
+      }
+    }
     resizePanel = false;
     dragEvent = null;
+    dragCancelled = false;
     repaint();
     ap.annotationPanel.repaint();
   }
@@ -312,6 +370,7 @@ public class AnnotationLabels extends Panel implements ActionListener,
 
   public void mouseExited(MouseEvent evt)
   {
+    dragCancelled = false;
 
     if (dragEvent == null)
     {
@@ -334,6 +393,7 @@ public class AnnotationLabels extends Panel implements ActionListener,
     {
       return;
     }
+    dragCancelled=false;
     // todo: move below to mouseClicked ?
     selectedRow = getSelectedRow(evt.getY() + scrollOffset);
 
@@ -637,7 +697,7 @@ public class AnnotationLabels extends Panel implements ActionListener,
       g.drawLine(2, 8, 5, 2);
       g.drawLine(5, 2, 8, 8);
     }
-    else if (dragEvent != null && aa != null)
+    else if (!dragCancelled && dragEvent != null && aa != null)
     {
       g.setColor(Color.lightGray);
       g.drawString(aa[selectedRow].label, dragEvent.getX(),
@@ -651,5 +711,4 @@ public class AnnotationLabels extends Panel implements ActionListener,
       g.drawString("to add annotation", 2, 18);
     }
   }
-
 }
-- 
1.7.10.2