/* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * *   - Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. * *   - Redistributions in binary form must reproduce the above copyright *     notice, this list of conditions and the following disclaimer in the *     documentation and/or other materials provided with the distribution. * *   - Neither the name of Sun Microsystems nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package components;import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.border.*;/*  * ScrollDemo.java requires these files: *   Rule.java *   Corner.java *   ScrollablePicture.java *   images/youngdad.jpeg */public class ScrollDemo extends JPanel                        implements ItemListener {    private Rule columnView;    private Rule rowView;    private JToggleButton isMetric;    private ScrollablePicture picture;    public ScrollDemo() {        setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));        //Get the image to use.        ImageIcon david = createImageIcon("images/youngdad.jpeg");        //Create the row and column headers.        columnView = new Rule(Rule.HORIZONTAL, true);        rowView = new Rule(Rule.VERTICAL, true);        if (david != null) {            columnView.setPreferredWidth(david.getIconWidth());            rowView.setPreferredHeight(david.getIconHeight());        } else {            columnView.setPreferredWidth(320);            rowView.setPreferredHeight(480);        }        //Create the corners.        JPanel buttonCorner = new JPanel(); //use FlowLayout        isMetric = new JToggleButton("cm", true);        isMetric.setFont(new Font("SansSerif", Font.PLAIN, 11));        isMetric.setMargin(new Insets(2,2,2,2));        isMetric.addItemListener(this);        buttonCorner.add(isMetric);         //Set up the scroll pane.        picture = new ScrollablePicture(david, columnView.getIncrement());        JScrollPane pictureScrollPane = new JScrollPane(picture);        pictureScrollPane.setPreferredSize(new Dimension(300, 250));        pictureScrollPane.setViewportBorder(                BorderFactory.createLineBorder(Color.black));        pictureScrollPane.setColumnHeaderView(columnView);        pictureScrollPane.setRowHeaderView(rowView);	//Set the corners.        //In theory, to support internationalization you would change        //UPPER_LEFT_CORNER to UPPER_LEADING_CORNER,        //LOWER_LEFT_CORNER to LOWER_LEADING_CORNER, and        //UPPER_RIGHT_CORNER to UPPER_TRAILING_CORNER.  In practice,        //bug #4467063 makes that impossible (in 1.4, at least).        pictureScrollPane.setCorner(JScrollPane.UPPER_LEFT_CORNER,                                    buttonCorner);        pictureScrollPane.setCorner(JScrollPane.LOWER_LEFT_CORNER,                                    new Corner());        pictureScrollPane.setCorner(JScrollPane.UPPER_RIGHT_CORNER,                                    new Corner());        //Put it in this panel.        add(pictureScrollPane);        setBorder(BorderFactory.createEmptyBorder(20,20,20,20));    }    public void itemStateChanged(ItemEvent e) {        if (e.getStateChange() == ItemEvent.SELECTED) {            //Turn it to metric.            rowView.setIsMetric(true);            columnView.setIsMetric(true);        } else {            //Turn it to inches.            rowView.setIsMetric(false);            columnView.setIsMetric(false);        }        picture.setMaxUnitIncrement(rowView.getIncrement());    }    /** Returns an ImageIcon, or null if the path was invalid. */    protected static ImageIcon createImageIcon(String path) {        java.net.URL imgURL = ScrollDemo.class.getResource(path);        if (imgURL != null) {            return new ImageIcon(imgURL);        } else {            System.err.println("Couldn't find file: " + path);            return null;        }    }    /**     * Create the GUI and show it.  For thread safety,     * this method should be invoked from the     * event-dispatching thread.     */    private static void createAndShowGUI() {        //Create and set up the window.        JFrame frame = new JFrame("ScrollDemo");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Create and set up the content pane.        JComponent newContentPane = new ScrollDemo();        newContentPane.setOpaque(true); //content panes must be opaque        frame.setContentPane(newContentPane);        //Display the window.        frame.pack();        frame.setVisible(true);    }    public static void main(String[] args) {        //Schedule a job for the event-dispatching thread:        //creating and showing this application's GUI.        javax.swing.SwingUtilities.invokeLater(new Runnable() {            public void run() {                createAndShowGUI();            }        });    }}