MoreSwingUtilities.java

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package com.arcle.rmt.j2se.swing.ui;

import javax.swing.*;

import java.awt.Component;
import java.awt.Container;
import java.awt.Window;
import java.awt.Frame;
import java.beans.PropertyVetoException;
import java.io.StringWriter;
import java.io.PrintWriter;

import com.arcle.rmt.xplat.util.MutableReference;

public final class MoreSwingUtilities {

    private MoreSwingUtilities() {
        throw new Error("MoreSwingUtilities is just a container for static methods");
    }


    public static boolean traverseAncestors(Component start, ComponentVisitor visitor) {
        Component current = start;
        boolean keepGoing;
        do {
            keepGoing = visitor.visitComponent(current);
            current = current.getParent();
        } while(keepGoing && current != null);
        return current == null;
    }

    public static Frame findFirstParentFrame(Component start) {
        return (Frame) SwingUtilities.getAncestorOfClass(Frame.class, start);
    }


    public static void disposeImmediateParent(Component start) {
        traverseAncestors(start, new ComponentVisitor() {
            public boolean visitComponent(Component c) {
                if (c instanceof Window) {
                    final Window w = (Window) c;
                    SwingUtilities.invokeLater(new Runnable() {
                        public void run() {
                            removeFromParent(w);
                            w.dispose();
                        }
                    });
                } else if (c instanceof JInternalFrame) {
                    final JInternalFrame f = (JInternalFrame) c;
                    JDesktopPane dp = f.getDesktopPane();
                    try {
                        f.doDefaultCloseAction();
                    } catch(NullPointerException e) {  }
                    if (dp != null) {
                        dp.invalidate();
                    }
                } else {
                     // continue search
                    return true;
                }
                return false;   // stop search
            }
        });
    }

    public static boolean removeFromParent(Component c) {
        if (c != null) {
            Container parent = c.getParent();
            if (parent != null) {
                parent.remove(c);
                return true;
            }
        }
        return false;
    }

    public static void showException(Component parent, Exception e) {
        showException(parent, e, "Unhandled Exception");
    }

    public static void showException(Component parent, Exception e,
            String title) {
        showThrowable(parent, e, title);
    }


    public static void showTextDialog(Component parent, String text,
            String title, int type) {
        JTextArea ta = new JTextArea(text);
        ta.setEditable(false);
        JOptionPane.showMessageDialog(parent, new JScrollPane(ta), title,
            type);
    }

    public static void showThrowable(Component parent, Throwable t, String title) {
        StringWriter str = new StringWriter(4096);
        t.printStackTrace(new PrintWriter(str));
        showTextDialog(parent, str.toString(), title,
            JOptionPane.ERROR_MESSAGE);
    }

}

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