import java.awt.Component;

import java.awt.BasicStroke;

import java.awt.Point;

import java.awt.geom.*;

import java.awt.RenderingHints;

import java.awt.Shape;

import javax.swing.JFrame;

import javax.swing.JToolTip;

import javax.swing.JComponent;

import org.openide.windows.WindowManager;

    private JToolTip tooltip;

        tooltip = new WelcomeToolTip();

        tooltip.setComponent(this);

        setToolTipText(label);

    public JToolTip createToolTip() {

        return tooltip;

    }

    @Override

    public Point getToolTipLocation(MouseEvent event) {

        JFrame frame = (JFrame) WindowManager.getDefault().getMainWindow();

        int mainWindowX = frame.getLocationOnScreen().x;

        Dimension mainWindowSize = frame.getSize();

        Rectangle tooltopVisible = getVisibleRect();

        Point tooltipLocation = getLocationOnScreen();

        System.err.println("Original Tooltip location x " + tooltipLocation.x);

        int ttX = 10;

        if ((mainWindowX + mainWindowSize.width)

                < (tooltipLocation.x + tooltopVisible.width)) {

            ttX =  - ((tooltipLocation.x + tooltopVisible.width) -

                    (mainWindowX + mainWindowSize.width));

        }

        return new Point(ttX, 20);

    }

    @Override

class WelcomeToolTip extends JToolTip {

    public WelcomeToolTip() {

        super();

        this.setOpaque(false);

    }

    @Override

    public Dimension getPreferredSize() {

        Dimension dim = super.getPreferredSize();

        return new Dimension((int)dim.getWidth() + 50,(int)dim.getHeight()+10);

    }

    @Override

    public void paintComponent(Graphics g) {

        // set the parent opaque

        Component parent = this.getParent();

        if(parent != null) {

            if(parent instanceof JComponent) {

                JComponent jparent = (JComponent)parent;

                if(jparent.isOpaque()) {

                    jparent.setOpaque(false);

                }

            }

        }

        // create a round rectangle

        Shape round = new RoundRectangle2D.Float(4f,4f,

            this.getWidth() -1f - 8f,

            this.getHeight() -1f -8f,

            15f,15f);

        // draw background

        Graphics2D g2 = Utils.prepareGraphics( g );

        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,

            RenderingHints.VALUE_ANTIALIAS_ON);

        // set GhostWhite background color

        g2.setColor(Color.getHSBColor(0.333f, 0.027f, 1f));

        g2.fill(round);

        // draw the LightSteelBlue border

        g2.setColor(Color.getHSBColor(0.406f, 0.207f,  0.871f));

        g2.setStroke(new BasicStroke(1));

        g2.draw(round);

        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,

            RenderingHints.VALUE_ANTIALIAS_DEFAULT);

        // draw the text

        String text = this.getComponent().getToolTipText();

        if(text != null) {

            FontMetrics fm = g2.getFontMetrics();

            int h = fm.getAscent();

            Font font = fm.getFont();

            g2.setFont(new Font(font.getFontName(), Font.BOLD, font.getSize()));

            g2.setColor(Color.DARK_GRAY);

            g2.drawString(text,10,(this.getHeight()+h)/2);

        }

    }

    @Override

    public void setToolTipText(String str) {

        super.setToolTipText(str);

    }

}