/* * 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 layout;/* * GridLayoutDemo.java * */import java.awt.*;import java.awt.event.*;import javax.swing.*;public class GridLayoutDemo extends JFrame {    static final String gapList[] = {"0", "10", "15", "20"};    final static int maxGap = 20;    JComboBox horGapComboBox;    JComboBox verGapComboBox;    JButton applyButton = new JButton("Apply gaps");    GridLayout experimentLayout = new GridLayout(0,2);        public GridLayoutDemo(String name) {        super(name);        setResizable(false);    }        public void initGaps() {        horGapComboBox = new JComboBox(gapList);        verGapComboBox = new JComboBox(gapList);    }        public void addComponentsToPane(final Container pane) {        initGaps();        final JPanel compsToExperiment = new JPanel();        compsToExperiment.setLayout(experimentLayout);        JPanel controls = new JPanel();        controls.setLayout(new GridLayout(2,3));                //Set up components preferred size        JButton b = new JButton("Just fake button");        Dimension buttonSize = b.getPreferredSize();        compsToExperiment.setPreferredSize(new Dimension((int)(buttonSize.getWidth() * 2.5)+maxGap,                (int)(buttonSize.getHeight() * 3.5)+maxGap * 2));                //Add buttons to experiment with Grid Layout        compsToExperiment.add(new JButton("Button 1"));        compsToExperiment.add(new JButton("Button 2"));        compsToExperiment.add(new JButton("Button 3"));        compsToExperiment.add(new JButton("Long-Named Button 4"));        compsToExperiment.add(new JButton("5"));                //Add controls to set up horizontal and vertical gaps        controls.add(new Label("Horizontal gap:"));        controls.add(new Label("Vertical gap:"));        controls.add(new Label(" "));        controls.add(horGapComboBox);        controls.add(verGapComboBox);        controls.add(applyButton);                //Process the Apply gaps button press        applyButton.addActionListener(new ActionListener(){            public void actionPerformed(ActionEvent e){                //Get the horizontal gap value                String horGap = (String)horGapComboBox.getSelectedItem();                //Get the vertical gap value                String verGap = (String)verGapComboBox.getSelectedItem();                //Set up the horizontal gap value                experimentLayout.setHgap(Integer.parseInt(horGap));                //Set up the vertical gap value                experimentLayout.setVgap(Integer.parseInt(verGap));                //Set up the layout of the buttons                experimentLayout.layoutContainer(compsToExperiment);            }        });        pane.add(compsToExperiment, BorderLayout.NORTH);        pane.add(new JSeparator(), BorderLayout.CENTER);        pane.add(controls, BorderLayout.SOUTH);    }        /**     * Create the GUI and show it.  For thread safety,     * this method is invoked from the     * event dispatch thread.     */    private static void createAndShowGUI() {        //Create and set up the window.        GridLayoutDemo frame = new GridLayoutDemo("GridLayoutDemo");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Set up the content pane.        frame.addComponentsToPane(frame.getContentPane());        //Display the window.        frame.pack();        frame.setVisible(true);    }        public static void main(String[] args) {        /* Use an appropriate Look and Feel */        try {            //UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");            UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");        } catch (UnsupportedLookAndFeelException ex) {            ex.printStackTrace();        } catch (IllegalAccessException ex) {            ex.printStackTrace();        } catch (InstantiationException ex) {            ex.printStackTrace();        } catch (ClassNotFoundException ex) {            ex.printStackTrace();        }        /* Turn off metal's use of bold fonts */        UIManager.put("swing.boldMetal", Boolean.FALSE);                //Schedule a job for the event dispatch thread:        //creating and showing this application's GUI.        javax.swing.SwingUtilities.invokeLater(new Runnable() {            public void run() {                createAndShowGUI();            }        });    }}