align Components - Java Swing

Java examples for Swing:Layout Manager

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Description

align Components

Demo Code

/*//w ww  . jav a2  s  . c  o  m
 * $Id$
 *
 * Copyright (c) 2002 - 2008, Edwin Dankert
 * 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 'Edwin Dankert' 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 REGENTS 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.
 */
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Insets;
import javax.swing.AbstractButton;
import javax.swing.Icon;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;

public class Main{
    private static void alignComponents(Component[] components) {
        Dimension size = new Dimension(0, 0);

        // Non windows Look and Feel
        if (UIManager.getLookAndFeel().getName().toLowerCase()
                .indexOf("windows") == -1) {
            Insets margin = null;
            Icon check = null;
            EmptyBorder border = null;

            // Find the icon size ...
            for (Component component : components) {
                if (component instanceof JMenuItem) {
                    if (component instanceof JCheckBoxMenuItem
                            || component instanceof JRadioButtonMenuItem
                            && check == null) {
                        margin = ((JMenuItem) component).getMargin();
                        check = UIManager
                                .getIcon("CheckBoxMenuItem.checkIcon");
                    }

                    updateSize(((JMenuItem) component), size);
                } else if (component instanceof JMenu) {
                    updateSize(((JMenuItem) component), size);
                }
            }

            if (check != null && margin != null) {
                border = new EmptyBorder(margin.top, margin.left
                        + check.getIconWidth(), margin.bottom, margin.right);
            }

            for (Component component : components) {

                if (component instanceof JMenuItem) {

                    if (component instanceof JCheckBoxMenuItem
                            || component instanceof JRadioButtonMenuItem) {
                        alignCheck((JMenuItem) component, size, null);
                    } else {
                        align((JMenuItem) component, size, border);
                    }

                } else if (component instanceof JMenu) {
                    align((JMenu) component, size, border);
                }
            }
        } else { // Windows Look and Feel
            // Find the icon size ...
            for (Component component : components) {

                if (component instanceof JMenuItem) {
                    updateSize((JMenuItem) component, size);
                } else if (component instanceof JMenu) {
                    updateSize((JMenu) component, size);
                }
            }

            for (Component component : components) {

                if (component instanceof JMenuItem) {

                    if (component instanceof JRadioButtonMenuItem) {
                        alignCheck((JMenuItem) component, size,
                                new EmptyBorder(2, 5, 2, 2));
                    } else if (component instanceof JCheckBoxMenuItem) {
                        alignCheck((JMenuItem) component, size, null);
                    } else {
                        align((JMenuItem) component, size, null);
                    }

                } else if (component instanceof JMenu) {
                    align((JMenu) component, size, null);
                }
            }
        }
    }
    private static void updateSize(AbstractButton button, Dimension size) {
        Icon icon = button.getIcon();

        if (icon != null) {
            size.width = Math.max(size.width, icon.getIconWidth());
            size.height = Math.max(size.height, icon.getIconHeight());
        }
    }
    private static void alignCheck(JMenuItem item, Dimension size,
            Border border) {
        Icon icon = item.getIcon();

        if (border != null) {
            item.setBorder(border);
        }

        if (icon != null && icon.getIconWidth() < size.width) {
            item.setIconTextGap(item.getIconTextGap()
                    + ((size.width - icon.getIconWidth()) / 2));
        } else if (icon == null) {
            item.setIcon(new DummyIcon(size));
        }
    }
    private static void align(AbstractButton button, Dimension size,
            Border border) {
        Icon icon = button.getIcon();

        if (border != null) {
            button.setBorder(border);
        }

        if (icon != null && icon.getIconWidth() < size.width) {
            Insets insets = button.getMargin();
            button.setBorder(new EmptyBorder(insets.top, insets.left
                    + (size.width - icon.getIconWidth()), insets.bottom,
                    insets.right));
        } else if (icon == null) {
            button.setIcon(new DummyIcon(size));
        }
    }
}

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