--- /dev/null
+/*\r
+ * Jalview - A Sequence Alignment Editor and Viewer\r
+ * Copyright (C) 2006 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle\r
+ *\r
+ * This program is free software; you can redistribute it and/or\r
+ * modify it under the terms of the GNU General Public License\r
+ * as published by the Free Software Foundation; either version 2\r
+ * of the License, or (at your option) any later version.\r
+ *\r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ * You should have received a copy of the GNU General Public License\r
+ * along with this program; if not, write to the Free Software\r
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA\r
+ */\r
+\r
+package jalview.appletgui;\r
+\r
+import java.awt.*;\r
+import java.applet.*;\r
+import java.awt.event.*;\r
+import java.util.*;\r
+\r
+public class Tooltip extends Canvas implements MouseListener,\r
+ MouseMotionListener\r
+{\r
+\r
+ private String [] tip;\r
+ protected Component owner;\r
+\r
+ private Container mainContainer;\r
+ private LayoutManager mainLayout;\r
+\r
+ private boolean shown;\r
+\r
+ private final int VERTICAL_OFFSET = 20;\r
+ private final int HORIZONTAL_ENLARGE = 10;\r
+\r
+ int fontHeight = 0;\r
+\r
+ Image linkImage;\r
+\r
+ FontMetrics fm;\r
+\r
+\r
+\r
+ public Tooltip(String tip, Component owner)\r
+ {\r
+ this.owner = owner;\r
+ owner.addMouseListener(this);\r
+ owner.addMouseMotionListener(this);\r
+ setBackground(new Color(255, 255, 220));\r
+ setTip(tip);\r
+ java.net.URL url = getClass().getResource("/images/link.gif");\r
+ if (url != null)\r
+ {\r
+ linkImage = java.awt.Toolkit.getDefaultToolkit().getImage(url);\r
+ }\r
+ }\r
+\r
+\r
+ public void paint(Graphics g)\r
+ {\r
+ g.drawRect(0,0,getSize().width -1, getSize().height -1);\r
+ int lindex, x;\r
+ for(int i=0; i<tip.length; i++)\r
+ {\r
+ x = 3;\r
+ lindex = tip[i].indexOf("%LINK%");\r
+ if(lindex!=-1)\r
+ {\r
+ if(lindex>0)\r
+ {\r
+ g.drawString(tip[i].substring(0, lindex), 3, (i+1)*fontHeight-3);\r
+ x+=fm.stringWidth(tip[i].substring(0, lindex)+3);\r
+ }\r
+ g.drawImage(linkImage, x, i * fontHeight+1, this);\r
+ }\r
+ else\r
+ g.drawString(tip[i], 3, (i+1)*fontHeight - 3);\r
+ }\r
+ }\r
+\r
+ private void addToolTip()\r
+ {\r
+ mainContainer.setLayout(null);\r
+ mainContainer.add(this, 0);\r
+ mainContainer.validate();\r
+ repaint();\r
+ shown = true;\r
+ }\r
+\r
+ void setTip(String tip)\r
+ {\r
+ fm = getFontMetrics(owner.getFont());\r
+ fontHeight = fm.getHeight();\r
+\r
+ int longestLine = 0;\r
+ StringTokenizer st = new StringTokenizer(tip, "\n");\r
+ this.tip = new String[st.countTokens()];\r
+ int index = 0;\r
+ while(st.hasMoreElements())\r
+ {\r
+ this.tip[index] = st.nextToken();\r
+ if(fm.stringWidth(this.tip[index])>longestLine)\r
+ longestLine = fm.stringWidth(this.tip[index]);\r
+ index ++;\r
+ }\r
+\r
+ setSize(longestLine + HORIZONTAL_ENLARGE,\r
+ fontHeight*this.tip.length);\r
+ }\r
+\r
+ void setTipLocation(int x, int y)\r
+ {\r
+\r
+ setLocation((owner.getLocationOnScreen().x - mainContainer.getLocationOnScreen().x) +x,\r
+ (owner.getLocationOnScreen().y - mainContainer.getLocationOnScreen().y + VERTICAL_OFFSET)+y);\r
+\r
+\r
+\r
+ // correction, whole tool tip must be visible\r
+ if (mainContainer.getSize().width < (getLocation().x + getSize().width))\r
+ {\r
+ setLocation(mainContainer.getSize().width - getSize().width,\r
+ getLocation().y);\r
+ }\r
+\r
+ }\r
+\r
+\r
+ private void removeToolTip() {\r
+ if (shown) {\r
+ mainContainer.remove(0);\r
+ mainContainer.setLayout(mainLayout);\r
+ mainContainer.validate();\r
+ }\r
+ shown = false;\r
+ }\r
+\r
+ private void findMainContainer() {\r
+ Container parent = owner.getParent();\r
+ while (true) {\r
+ if ((parent instanceof Applet) || (parent instanceof Frame)) {\r
+ mainContainer = parent;\r
+ break;\r
+ } else {\r
+ parent = parent.getParent();\r
+ }\r
+ }\r
+ mainLayout = mainContainer.getLayout();\r
+ }\r
+\r
+ public void mouseEntered(MouseEvent me)\r
+ { }\r
+\r
+ public void mouseExited(MouseEvent me)\r
+ {\r
+ removeToolTip();\r
+ }\r
+\r
+ public void mousePressed(MouseEvent me)\r
+ {\r
+ removeToolTip();\r
+ }\r
+\r
+ public void mouseReleased(MouseEvent me)\r
+ {}\r
+\r
+ public void mouseClicked(MouseEvent me)\r
+ {}\r
+\r
+ public void mouseMoved(MouseEvent me)\r
+ {\r
+ if (shown)\r
+ setTipLocation(me.getX(), me.getY());\r
+ else\r
+ {\r
+ findMainContainer();\r
+ addToolTip();\r
+ setTipLocation(me.getX(), me.getY());\r
+ }\r
+ }\r
+\r
+ public void mouseDragged(MouseEvent me)\r
+ {}\r
+}\r
git://source.jalview.org / jalview.git / blobdiff