2 * Jalview - A Sequence Alignment Editor and Viewer
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3 * Copyright (C) 2006 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
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5 * This program is free software; you can redistribute it and/or
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6 * modify it under the terms of the GNU General Public License
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7 * as published by the Free Software Foundation; either version 2
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8 * of the License, or (at your option) any later version.
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program; if not, write to the Free Software
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17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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20 package jalview.appletgui;
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23 import java.applet.*;
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24 import java.awt.event.*;
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27 public class Tooltip extends Canvas implements MouseListener,
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31 private String [] tip;
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32 protected Component owner;
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34 private Container mainContainer;
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35 private LayoutManager mainLayout;
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37 private boolean shown;
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39 private final int VERTICAL_OFFSET = 20;
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40 private final int HORIZONTAL_ENLARGE = 10;
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50 public Tooltip(String tip, Component owner)
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53 owner.addMouseListener(this);
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54 owner.addMouseMotionListener(this);
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55 setBackground(new Color(255, 255, 220));
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57 java.net.URL url = getClass().getResource("/images/link.gif");
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60 linkImage = java.awt.Toolkit.getDefaultToolkit().getImage(url);
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65 public void paint(Graphics g)
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67 g.drawRect(0,0,getSize().width -1, getSize().height -1);
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69 for(int i=0; i<tip.length; i++)
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72 lindex = tip[i].indexOf("%LINK%");
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77 g.drawString(tip[i].substring(0, lindex), 3, (i+1)*fontHeight-3);
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78 x+=fm.stringWidth(tip[i].substring(0, lindex)+3);
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80 g.drawImage(linkImage, x, i * fontHeight+1, this);
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81 if(lindex+6<tip[i].length())
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83 g.drawString(tip[i].substring(lindex+6),
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84 x + linkImage.getWidth(this),
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85 (i+1)*fontHeight-3);
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90 g.drawString(tip[i], 3, (i+1)*fontHeight - 3);
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94 private void addToolTip()
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96 mainContainer.setLayout(null);
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97 mainContainer.add(this, 0);
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98 mainContainer.validate();
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103 void setTip(String tip)
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110 fm = getFontMetrics(owner.getFont());
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111 fontHeight = fm.getHeight();
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113 int longestLine = 0;
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114 StringTokenizer st = new StringTokenizer(tip, "\n");
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115 this.tip = new String[st.countTokens()];
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117 while(st.hasMoreElements())
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119 this.tip[index] = st.nextToken();
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120 if(fm.stringWidth(this.tip[index])>longestLine)
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121 longestLine = fm.stringWidth(this.tip[index]);
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125 setSize(longestLine + HORIZONTAL_ENLARGE,
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126 fontHeight*this.tip.length);
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129 void setTipLocation(int x, int y)
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132 setLocation((owner.getLocationOnScreen().x - mainContainer.getLocationOnScreen().x) +x,
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133 (owner.getLocationOnScreen().y - mainContainer.getLocationOnScreen().y + VERTICAL_OFFSET)+y);
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137 // correction, whole tool tip must be visible
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138 if (mainContainer.getSize().width < (getLocation().x + getSize().width))
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140 setLocation(mainContainer.getSize().width - getSize().width,
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147 private void removeToolTip() {
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149 mainContainer.remove(0);
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150 mainContainer.setLayout(mainLayout);
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151 mainContainer.validate();
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156 private void findMainContainer() {
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157 Container parent = owner.getParent();
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159 if ((parent instanceof Applet) || (parent instanceof Frame)) {
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160 mainContainer = parent;
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163 parent = parent.getParent();
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166 mainLayout = mainContainer.getLayout();
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169 public void mouseEntered(MouseEvent me)
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172 public void mouseExited(MouseEvent me)
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177 public void mousePressed(MouseEvent me)
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182 public void mouseReleased(MouseEvent me)
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185 public void mouseClicked(MouseEvent me)
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188 public void mouseMoved(MouseEvent me)
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191 setTipLocation(me.getX(), me.getY());
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194 findMainContainer();
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196 setTipLocation(me.getX(), me.getY());
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200 public void mouseDragged(MouseEvent me)
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