From 4756b29312ca78d0975248c65e50157399e6ce39 Mon Sep 17 00:00:00 2001
From: amwaterhouse <Andrew Waterhouse>
Date: Thu, 1 Feb 2007 12:37:08 +0000
Subject: [PATCH] Doesnt move with mouse, friendlier for mac users

---
 src/jalview/appletgui/Tooltip.java |  112 ++++++++++++++++++++----------------
 1 file changed, 61 insertions(+), 51 deletions(-)

diff --git a/src/jalview/appletgui/Tooltip.java b/src/jalview/appletgui/Tooltip.java
index 9306e3d..6766330 100755
--- a/src/jalview/appletgui/Tooltip.java
+++ b/src/jalview/appletgui/Tooltip.java
@@ -27,8 +27,9 @@ import java.util.*;
 public class Tooltip extends Canvas implements MouseListener,
     MouseMotionListener
 {
-
         private String [] tip;
+        private String lastTip="";
+        private boolean setPosition = false;
         protected Component owner;
 
         private Container mainContainer;
@@ -45,8 +46,6 @@ public class Tooltip extends Canvas implements MouseListener,
 
         FontMetrics fm;
 
-
-
         public Tooltip(String tip, Component owner)
         {
           this.owner = owner;
@@ -61,52 +60,53 @@ public class Tooltip extends Canvas implements MouseListener,
           }
         }
 
-
         public void paint(Graphics g)
         {
-                g.drawRect(0,0,getSize().width -1, getSize().height -1);
-                int lindex, x;
-                for(int i=0; i<tip.length; i++)
-                {
-                  x = 3;
-                  lindex = tip[i].indexOf("%LINK%");
-                  if(lindex!=-1)
-                  {
-                   if(lindex>0)
-                   {
-                     g.drawString(tip[i].substring(0, lindex), 3, (i+1)*fontHeight-3);
-                     x+=fm.stringWidth(tip[i].substring(0, lindex)+3);
-                   }
-                   g.drawImage(linkImage, x, i * fontHeight+1, this);
-                   if(lindex+6<tip[i].length())
-                   {
-                     g.drawString(tip[i].substring(lindex+6),
-                                  x + linkImage.getWidth(this),
-                                  (i+1)*fontHeight-3);
-                   }
-
-                  }
-                  else
-                  g.drawString(tip[i], 3, (i+1)*fontHeight - 3);
-                }
-        }
+          int w = getSize().width;
+          int h = getSize().height;
 
-        private void addToolTip()
-        {
-                mainContainer.setLayout(null);
-                mainContainer.add(this, 0);
-                mainContainer.validate();
-                repaint();
-                shown = true;
+          g.drawRect(0, 0, w - 1, h - 1);
+          int lindex, x;
+          for (int i = 0; i < tip.length; i++)
+          {
+            x = 3;
+            lindex = tip[i].indexOf("%LINK%");
+            if (lindex != -1)
+            {
+              if (lindex > 0)
+              {
+                g.drawString(tip[i].substring(0, lindex), 3, (i + 1) * fontHeight - 3);
+                x += fm.stringWidth(tip[i].substring(0, lindex) + 3);
+              }
+              g.drawImage(linkImage, x, i * fontHeight + 1, this);
+              if (lindex + 6 < tip[i].length())
+              {
+                g.drawString(tip[i].substring(lindex + 6),
+                             x + linkImage.getWidth(this),
+                             (i + 1) * fontHeight - 3);
+              }
+            }
+            else
+            {
+              g.drawString(tip[i], 3, (i + 1) * fontHeight - 3);
+            }
+          }
         }
 
-        void setTip(String tip)
+        synchronized void setTip(String tip)
         {
           if(tip==null)
           {
             setTip("");
             return;
           }
+
+          if(lastTip.equals(tip))
+            return;
+
+          lastTip = tip;
+          setPosition = true;
+
           fm = getFontMetrics(owner.getFont());
           fontHeight = fm.getHeight();
 
@@ -124,15 +124,18 @@ public class Tooltip extends Canvas implements MouseListener,
 
           setSize(longestLine + HORIZONTAL_ENLARGE,
                   fontHeight*this.tip.length);
-        }
-
-        void setTipLocation(int x, int y)
-        {
 
-          setLocation((owner.getLocationOnScreen().x - mainContainer.getLocationOnScreen().x) +x,
-           (owner.getLocationOnScreen().y - mainContainer.getLocationOnScreen().y + VERTICAL_OFFSET)+y);
+          repaint();
 
+        }
 
+        void setTipLocation(MouseEvent evt)
+        {
+          setLocation( (owner.getLocationOnScreen().x
+                        - mainContainer.getLocationOnScreen().x) + evt.getX(),
+                      (owner.getLocationOnScreen().y -
+                       mainContainer.getLocationOnScreen().y
+                       + VERTICAL_OFFSET) + evt.getY());
 
         // correction, whole tool tip must be visible
           if (mainContainer.getSize().width < (getLocation().x + getSize().width))
@@ -140,7 +143,6 @@ public class Tooltip extends Canvas implements MouseListener,
             setLocation(mainContainer.getSize().width - getSize().width,
                         getLocation().y);
           }
-
         }
 
 
@@ -167,7 +169,9 @@ public class Tooltip extends Canvas implements MouseListener,
         }
 
         public void mouseEntered(MouseEvent me)
-        {     }
+        {
+          setTipLocation(me);
+        }
 
         public void mouseExited(MouseEvent me)
         {
@@ -187,13 +191,19 @@ public class Tooltip extends Canvas implements MouseListener,
 
         public void mouseMoved(MouseEvent me)
         {
-          if (shown)
-            setTipLocation(me.getX(), me.getY());
-          else
+         if(!shown)
           {
             findMainContainer();
-            addToolTip();
-            setTipLocation(me.getX(), me.getY());
+            mainContainer.setLayout(null);
+            mainContainer.add(this, 0);
+            mainContainer.validate();
+            shown = true;
+            setTipLocation(me);
+          }
+          else if (setPosition)
+          {
+            setTipLocation(me);
+            setPosition = false;
           }
         }
 
-- 
1.7.10.2