SpringDemo4.java Source code

Introduction

Here is the source code for SpringDemo4.java

Source

/*
 *
 * Copyright (c) 1998 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
 * modify and redistribute this software in source and binary code form,
 * provided that i) this copyright notice and license appear on all copies of
 * the software; and ii) Licensee does not utilize the software in a manner
 * which is disparaging to Sun.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
 * LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
 * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
 * LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
 * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
 * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
 * OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * This software is not designed or intended for use in on-line control of
 * aircraft, air traffic, aircraft navigation or aircraft communications; or in
 * the design, construction, operation or maintenance of any nuclear
 * facility. Licensee represents and warrants that it will not use or
 * redistribute the Software for such purposes.
 */

import java.awt.Component;
import java.awt.Container;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.Spring;
import javax.swing.SpringLayout;

public class SpringDemo4 {
    public static void main(String[] args) {
        JFrame frame = new JFrame("SpringDemo4");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // Set up the content pane.
        Container contentPane = frame.getContentPane();
        SpringLayout layout = new SpringLayout();
        contentPane.setLayout(layout);

        // Create and add the components.
        JLabel label = new JLabel("Label: ");
        JTextField textField = new JTextField("Text field", 15);
        contentPane.add(label);
        contentPane.add(textField);

        // Adjust constraints for the label so it's at (5,5).
        SpringLayout.Constraints labelCons = layout.getConstraints(label);
        labelCons.setX(Spring.constant(5));
        labelCons.setY(Spring.constant(5));

        // Adjust constraints for the text field so it's at
        // (<label's right edge> + 5, 5).
        SpringLayout.Constraints textFieldCons = layout.getConstraints(textField);
        textFieldCons.setX(Spring.sum(Spring.constant(5), labelCons.getConstraint(SpringLayout.EAST)));
        textFieldCons.setY(Spring.constant(5));

        // Adjust constraints for the content pane.
        setContainerSize(contentPane, 5);

        // Display the window.
        frame.pack();
        frame.setVisible(true);
    }

    public static void setContainerSize(Container parent, int pad) {
        SpringLayout layout = (SpringLayout) parent.getLayout();
        Component[] components = parent.getComponents();
        Spring maxHeightSpring = Spring.constant(0);
        SpringLayout.Constraints pCons = layout.getConstraints(parent);

        // Set the container's right edge to the right edge
        // of its rightmost component + padding.
        Component rightmost = components[components.length - 1];
        SpringLayout.Constraints rCons = layout.getConstraints(rightmost);
        pCons.setConstraint(SpringLayout.EAST,
                Spring.sum(Spring.constant(pad), rCons.getConstraint(SpringLayout.EAST)));

        // Set the container's bottom edge to the bottom edge
        // of its tallest component + padding.
        for (int i = 0; i < components.length; i++) {
            SpringLayout.Constraints cons = layout.getConstraints(components[i]);
            maxHeightSpring = Spring.max(maxHeightSpring, cons.getConstraint(SpringLayout.SOUTH));
        }
        pCons.setConstraint(SpringLayout.SOUTH, Spring.sum(Spring.constant(pad), maxHeightSpring));
    }
}