X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fappletgui%2FTooltip.java;h=7168cf3b1419bb3f4f230f1c3da8e7a71873970e;hb=2de8acfae59aced665e4c37ad0f7dcc2ed68818e;hp=b25abd5c7bc26f1b17f7fa2df88137129b8d4855;hpb=bceadbb394604c88ac18e2dcf4b33e735377d7ac;p=jalview.git

diff --git a/src/jalview/appletgui/Tooltip.java b/src/jalview/appletgui/Tooltip.java
index b25abd5..7168cf3 100755
--- a/src/jalview/appletgui/Tooltip.java
+++ b/src/jalview/appletgui/Tooltip.java
@@ -1,172 +1,233 @@
-
+/*
+ * Jalview - A Sequence Alignment Editor and Viewer (Development Version 2.4.1)
+ * Copyright (C) 2009 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
 package jalview.appletgui;
 
-import java.awt.*;
 import java.applet.*;
-import java.awt.event.*;
 import java.util.*;
 
+import java.awt.*;
+import java.awt.event.*;
+
 public class Tooltip extends Canvas implements MouseListener,
-    MouseMotionListener
+        MouseMotionListener
 {
+  private String[] tip;
 
-        private String [] tip;
-        protected Component owner;
-
-        private Container mainContainer;
-        private LayoutManager mainLayout;
-
-        private boolean shown;
-
-        private final int VERTICAL_OFFSET = 20;
-        private final int HORIZONTAL_ENLARGE = 10;
-
-        int fontHeight = 0;
-
-        Image linkImage;
-
-        FontMetrics fm;
-
-
-
-        public Tooltip(String tip, Component owner)
-        {
-          this.owner = owner;
-          owner.addMouseListener(this);
-          owner.addMouseMotionListener(this);
-          setBackground(new Color(255, 255, 220));
-          setTip(tip);
-          java.net.URL url = getClass().getResource("/images/link.gif");
-          if (url != null)
-          {
-            linkImage = java.awt.Toolkit.getDefaultToolkit().getImage(url);
-          }
-        }
-
+  private String lastTip = "";
 
-        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);
-                  }
-                  else
-                  g.drawString(tip[i], 3, (i+1)*fontHeight - 3);
-                }
-        }
-
-        private void addToolTip()
-        {
-                mainContainer.setLayout(null);
-                mainContainer.add(this, 0);
-                mainContainer.validate();
-                repaint();
-                shown = true;
-        }
+  private boolean setPosition = false;
 
-        void setTip(String tip)
-        {
-          fm = getFontMetrics(owner.getFont());
-          fontHeight = fm.getHeight();
-
-          int longestLine = 0;
-          StringTokenizer st = new StringTokenizer(tip, "\n");
-          this.tip = new String[st.countTokens()];
-          int index = 0;
-          while(st.hasMoreElements())
-          {
-            this.tip[index] = st.nextToken();
-            if(fm.stringWidth(this.tip[index])>longestLine)
-              longestLine = fm.stringWidth(this.tip[index]);
-            index ++;
-          }
-
-          setSize(longestLine + HORIZONTAL_ENLARGE,
-                  fontHeight*this.tip.length);
-        }
-
-        void setTipLocation(int x, int y)
-        {
+  protected Component owner;
 
-          setLocation((owner.getLocationOnScreen().x - mainContainer.getLocationOnScreen().x) +x,
-           (owner.getLocationOnScreen().y - mainContainer.getLocationOnScreen().y + VERTICAL_OFFSET)+y);
+  private Container mainContainer;
 
+  private LayoutManager mainLayout;
 
+  private boolean shown;
 
-        // correction, whole tool tip must be visible
-          if (mainContainer.getSize().width < (getLocation().x + getSize().width))
-          {
-            setLocation(mainContainer.getSize().width - getSize().width,
-                        getLocation().y);
-          }
+  private final int VERTICAL_OFFSET = 20;
 
-        }
+  private final int HORIZONTAL_ENLARGE = 10;
 
+  int fontHeight = 0;
 
-        private void removeToolTip() {
-                if (shown) {
-                        mainContainer.remove(0);
-                        mainContainer.setLayout(mainLayout);
-                        mainContainer.validate();
-                }
-                shown = false;
-        }
+  Image linkImage;
 
-        private void findMainContainer() {
-                Container parent = owner.getParent();
-                while (true) {
-                        if ((parent instanceof Applet) || (parent instanceof Frame)) {
-                                mainContainer = parent;
-                                break;
-                        } else {
-                                parent = parent.getParent();
-                        }
-                }
-                mainLayout = mainContainer.getLayout();
-        }
+  FontMetrics fm;
 
-        public void mouseEntered(MouseEvent me)
-        {     }
+  public Tooltip(String tip, Component owner)
+  {
+    this.owner = owner;
+    owner.addMouseListener(this);
+    owner.addMouseMotionListener(this);
+    setBackground(new Color(255, 255, 220));
+    setTip(tip);
+    java.net.URL url = getClass().getResource("/images/link.gif");
+    if (url != null)
+    {
+      linkImage = java.awt.Toolkit.getDefaultToolkit().getImage(url);
+    }
+  }
 
-        public void mouseExited(MouseEvent me)
-        {
-          removeToolTip();
-        }
+  public void paint(Graphics g)
+  {
+    int w = getSize().width;
+    int h = getSize().height;
 
-        public void mousePressed(MouseEvent me)
+    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)
         {
-          removeToolTip();
+          g.drawString(tip[i].substring(0, lindex), 3, (i + 1) * fontHeight
+                  - 3);
+          x += fm.stringWidth(tip[i].substring(0, lindex) + 3);
         }
-
-        public void mouseReleased(MouseEvent me)
-        {}
-
-        public void mouseClicked(MouseEvent me)
-        {}
-
-        public void mouseMoved(MouseEvent me)
+        g.drawImage(linkImage, x, i * fontHeight + 1, this);
+        if (lindex + 6 < tip[i].length())
         {
-          if (shown)
-            setTipLocation(me.getX(), me.getY());
-          else
-          {
-            findMainContainer();
-            addToolTip();
-            setTipLocation(me.getX(), me.getY());
-          }
+          g.drawString(tip[i].substring(lindex + 6), x
+                  + linkImage.getWidth(this), (i + 1) * fontHeight - 3);
         }
-
-        public void mouseDragged(MouseEvent me)
-        {}
+      }
+      else
+      {
+        g.drawString(tip[i], 3, (i + 1) * fontHeight - 3);
+      }
+    }
+  }
+
+  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();
+
+    int longestLine = 0;
+    StringTokenizer st = new StringTokenizer(tip, "\n");
+    this.tip = new String[st.countTokens()];
+    int index = 0;
+    while (st.hasMoreElements())
+    {
+      this.tip[index] = st.nextToken();
+      if (fm.stringWidth(this.tip[index]) > longestLine)
+      {
+        longestLine = fm.stringWidth(this.tip[index]);
+      }
+      index++;
+    }
+
+    setSize(longestLine + HORIZONTAL_ENLARGE, fontHeight * this.tip.length);
+
+    repaint();
+
+  }
+
+  void setTipLocation(MouseEvent evt)
+  {
+    if (mainContainer == null || owner == null)
+    {
+      return;
+    }
+    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))
+    {
+      setLocation(mainContainer.getSize().width - getSize().width,
+              getLocation().y);
+    }
+  }
+
+  private void removeToolTip()
+  {
+    if (shown)
+    {
+      mainContainer.remove(0);
+      mainContainer.setLayout(mainLayout);
+      mainContainer.validate();
+    }
+    shown = false;
+  }
+
+  private void findMainContainer()
+  {
+    Container parent = owner.getParent();
+    while (true)
+    {
+      if ((parent instanceof Applet) || (parent instanceof Frame))
+      {
+        mainContainer = parent;
+        break;
+      }
+      else
+      {
+        parent = parent.getParent();
+      }
+    }
+    mainLayout = mainContainer.getLayout();
+  }
+
+  public void mouseEntered(MouseEvent me)
+  {
+    setTipLocation(me);
+  }
+
+  public void mouseExited(MouseEvent me)
+  {
+    removeToolTip();
+  }
+
+  public void mousePressed(MouseEvent me)
+  {
+    removeToolTip();
+  }
+
+  public void mouseReleased(MouseEvent me)
+  {
+  }
+
+  public void mouseClicked(MouseEvent me)
+  {
+  }
+
+  public void mouseMoved(MouseEvent me)
+  {
+    if (!shown)
+    {
+      findMainContainer();
+      mainContainer.setLayout(null);
+      mainContainer.add(this, 0);
+      mainContainer.validate();
+      shown = true;
+      setTipLocation(me);
+    }
+    else if (setPosition)
+    {
+      setTipLocation(me);
+      setPosition = false;
+    }
+  }
+
+  public void mouseDragged(MouseEvent me)
+  {
+  }
 }