Java JButton Settings showJFileChooser(javax.swing.JFileChooser chooser, java.awt.Component parent, java.lang.String approveButtonText)

Description

Utility method for avoiding of memory leak in JDK 1.3 / JFileChooser.showDialog(...)

License

Sun Public License Notice

Parameter

Parameter	Description
parent	a parameter
approveButtonText	a parameter

Declaration

public static final int showJFileChooser(javax.swing.JFileChooser chooser, java.awt.Component parent,
        java.lang.String approveButtonText) 

Method Source Code

//package com.java2s;
/*/* w w  w. ja  va2 s .  c  o  m*/
 *                 Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 *
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2004 Sun
 * Microsystems, Inc. All Rights Reserved.
 */

import java.awt.*;

public class Main {
    /** Utility method for avoiding of memory leak in JDK 1.3 / JFileChooser.showDialog(...)
     * @param parent
     * @param approveButtonText
     * @deprecated Not needed in JDK 1.4.
     */
    public static final int showJFileChooser(javax.swing.JFileChooser chooser, java.awt.Component parent,
            java.lang.String approveButtonText) {
        if (approveButtonText != null) {
            chooser.setApproveButtonText(approveButtonText);
            chooser.setDialogType(javax.swing.JFileChooser.CUSTOM_DIALOG);
        }

        Frame frame = null;
        Dialog parentDlg = null;

        if (parent instanceof Dialog)
            parentDlg = (Dialog) parent;
        else
            frame = parent instanceof java.awt.Frame ? (Frame) parent
                    : (Frame) javax.swing.SwingUtilities.getAncestorOfClass(Frame.class, parent);

        String title = chooser.getDialogTitle();

        if (title == null) {
            title = chooser.getUI().getDialogTitle(chooser);
        }

        final javax.swing.JDialog dialog;
        if (parentDlg != null)
            dialog = new javax.swing.JDialog(parentDlg, title, true);
        else
            dialog = new javax.swing.JDialog(frame, title, true);

        dialog.setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
        Container contentPane = dialog.getContentPane();
        contentPane.setLayout(new BorderLayout());
        contentPane.add(chooser, BorderLayout.CENTER);

        dialog.pack();
        dialog.setBounds(findCenterBounds(parent.getGraphicsConfiguration(), dialog.getSize()));

        chooser.rescanCurrentDirectory();
        final int[] retValue = new int[] { javax.swing.JFileChooser.CANCEL_OPTION };

        java.awt.event.ActionListener l = new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent ev) {
                if (ev.getActionCommand() == javax.swing.JFileChooser.APPROVE_SELECTION) {
                    retValue[0] = javax.swing.JFileChooser.APPROVE_OPTION;
                }
                dialog.setVisible(false);
                dialog.dispose();
            }
        };
        chooser.addActionListener(l);

        dialog.show();
        return retValue[0];
    }

    /**
     * Helps client code place components on the center of the screen.  It
     * handles multiple monitor configuration correctly
     *
     * @param componentSize the size of the component
     * @return bounds of the centered component
     *
     * @since 2.5
     */
    public static Rectangle findCenterBounds(Dimension componentSize) {
        return findCenterBounds(getCurrentGraphicsConfiguration(), componentSize);
    }

    /**
     * Helps client code place components on the center of the screen.  It
     * handles multiple monitor configuration correctly
     *
     * @param gconf the GraphicsConfiguration of the monitor
     * @param componentSize the size of the component
     * @return bounds of the centered component
     */
    private static Rectangle findCenterBounds(GraphicsConfiguration gconf, Dimension componentSize) {
        if (gconf == null)
            gconf = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice()
                    .getDefaultConfiguration();

        Rectangle bounds = gconf.getBounds();
        return new Rectangle(bounds.x + (bounds.width - componentSize.width) / 2,
                bounds.y + (bounds.height - componentSize.height) / 2, componentSize.width, componentSize.height);
    }

    /**
     * Finds out the monitor where the user currently has the input focus.
     * This method is usually used to help the client code to figure out on
     * which monitor it should place newly created windows/frames/dialogs.
     *
     * @return the GraphicsConfiguration of the monitor which currently has the
     * input focus
     */
    private static GraphicsConfiguration getCurrentGraphicsConfiguration() {
        Frame[] frames = Frame.getFrames();

        for (int i = 0; i < frames.length; i++) {
            if (javax.swing.SwingUtilities.findFocusOwner(frames[i]) != null) {
                return frames[i].getGraphicsConfiguration();
            }
        }
        return GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
    }
}

Related

1. setSelectedButton(ButtonGroup group, int index)
2. setSelectedSilently(AbstractButton x, boolean b)
3. setToggleGroups(final JToggleButton... buttons)
4. setToggling(AbstractButton b)
5. setWithoutNotifyingListeners(AbstractButton button, boolean selected)
6. showJFileChooser(JFileChooser chooser, Component parent, String approveButtonText)
7. showOptions(int width, int type, String title, String text, Object... buttons)
8. styleButton(final AbstractButton btn)
9. toBold(final T button)