VisClient/org/hfbk/util/Tooltip.java

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package org.hfbk.util;

import java.awt.Component;
import java.awt.Container;
import java.awt.DisplayMode;
import java.awt.FontMetrics;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.MouseInfo;
import java.awt.Point;
import java.awt.Window;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

public class Tooltip extends Window {

        String tip;

        Component owner;

        Container mainContainer;

        final int HORIZONTAL_ENLARGE = 10;

        int linecount, lineheight = 0;

        public Tooltip(String tip, Component owner) {
                super(new Frame());
        //      super(findTop(owner));
                // setUndecorated(true);
                this.tip = tip;
                this.owner = owner;
                this.linecount = tip.split("\\n").length;

                owner.addMouseListener(new MAdapter());
                UIUtils.blackify(this); // apply the classic vis look!
        }

        public void paint(Graphics g) {
                g.drawRect(0, 0, getSize().width - 1, getSize().height - 1);
                String[] lines = tip.split("\\n");
                for (int i = 0; i < lines.length; i++)
                        g.drawString(lines[i], 3, lineheight * (i + 1) - 3);
        }

        private void addToolTip(int x, int y) {
                FontMetrics fm = getFontMetrics(owner.getFont());
                lineheight = fm.getHeight();
                int width=0;
                for (String line : tip.split("\\n")){
                        width=Math.max(width, fm.stringWidth(line));
                }
                setSize(width + HORIZONTAL_ENLARGE, lineheight
                                * linecount);
                setLocation(x, y);
                setVisible(true);
        }

        static Window findTop(Component c){             
                while (c!=null && !(c instanceof Window)) c=c.getParent();
                return (Window)c;
        }
        /*
         * private void addToolTip() { mainContainer.setLayout(null);
         * 
         * FontMetrics fm = getFontMetrics(owner.getFont());
         * lineheight=fm.getHeight(); setSize(fm.stringWidth(tip) +
         * HORIZONTAL_ENLARGE, lineheight*linecount);
         * 
         * setLocation((owner.getLocationOnScreen().x -
         * mainContainer.getLocationOnScreen().x) , (owner.getLocationOnScreen().y -
         * mainContainer.getLocationOnScreen().y + VERTICAL_OFFSET));
         * 
         * 
         * if (mainContainer.getSize().width < ( getLocation().x + getSize().width )) {
         * setLocation(mainContainer.getSize().width - getSize().width,
         * getLocation().y); } mainContainer.add(this, 0); mainContainer.validate();
         * repaint(); shown = true; } /* 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(); }
         */
        
        class MAdapter extends MouseAdapter {
                public void mouseEntered(MouseEvent me) {
                        
                        DisplayMode dp=owner.getGraphicsConfiguration().getDevice().getDisplayMode();
                        Point mouse=MouseInfo.getPointerInfo().getLocation();
                        int x=mouse.x + 1;
                        int y=mouse.y + 16;
                        
                        if (x+ getWidth()>dp.getWidth ()) x=dp.getWidth ()-getWidth();
                        //if (y+getHeight()>dp.getHeight()) y=dp.getHeight()-getHeight();
                        if (y+getHeight()>dp.getHeight()) y-=32+getHeight();
                        
                        addToolTip(x,y);
                }

                public void mouseExited(MouseEvent me) {
                        setVisible(false);
                }

                public void mousePressed(MouseEvent me) {
                        setVisible(false);
                }
        }
}

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