SELECTIONLISTSPANEL

package com.infodavid.gui;
/*
 * Copyright (c) 2001 David Rolland
 *
 * 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.
 *
 * -Redistribution in binary form must reproduct the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 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. D.Rolland 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 D.Rolland
 * 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 D.Rolland HAS BEEN ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * You acknowledge that Software is not designed,licensed or intended for use in
 * the design, construction, operation or maintenance of any nuclear facility.
 */
import javax.swing.JSplitPane;
import javax.swing.JList;
import javax.swing.JButton;

import java.awt.dnd.*;

import java.awt.BorderLayout;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import sun.net.www.MimeEntry;

import java.beans.PropertyVetoException;

/* infodavid */
import com.infodavid.lang.LanguageObject;
import com.infodavid.lang.Language;

import com.infodavid.gui.events.ActionToChangeListener;
import com.infodavid.gui.events.ActionToDropListener;
/**
 * Title:
 * Description:
 * Copyright:    Copyright (c) 2001
 * Company:      David Rolland, infodavid@chez.com
 * @author       David Rolland, infodavid@chez.com
 * @version 0.2
 */
public class SelectionListsPanel extends AbstractPanel {
  private class DefaultGlobalListTargetListener extends ActionToDropListener {
    public DefaultGlobalListTargetListener(ActionListener al) { super(al); }

    public boolean isDragAcceptable(DropTargetEvent e) {
      return (adding || removing) && isEnabled();
    }

    public boolean isDropAcceptable(DropTargetEvent e) {
      return adding && isEnabled();
    }

    public void dragEnter(DropTargetDragEvent e) {
      removing = false;

      if (!isDragAcceptable(e)) {
        e.rejectDrag();
      }
    }

    public void dragExit(DropTargetEvent e) {
      if (adding) {
        adding = false;
      }
      else {
        removing = true;
      }
    }

    public void drop(DropTargetDropEvent e) {
      if (!isDropAcceptable(e)) {
        e.rejectDrop();
      }
      else {
        e.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);

        super.drop(e);

        adding = false;

        e.dropComplete(true);
      }
    }
  }

  private class DefaultSelectionListTargetListener extends ActionToDropListener {
    public DefaultSelectionListTargetListener(ActionListener al) { super(al); }

    public boolean isDragAcceptable(DropTargetEvent e) {
      return (adding || removing) && isEnabled();
    }

    public boolean isDropAcceptable(DropTargetEvent e) {
      return removing && isEnabled();
    }

    public void dragEnter(DropTargetDragEvent e) {
      adding = false;

      if (!isDragAcceptable(e)) {
        e.rejectDrag();
      }
    }

    public void dragExit(DropTargetEvent e) {
      if (removing) {
        removing = false;
      }
      else {
        adding = true;
      }
    }

    public void drop(DropTargetDropEvent e) {
      if (!isDropAcceptable(e)) {
        e.rejectDrop();
      }
      else {
        e.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);

        super.drop(e);

        removing = false;

        e.dropComplete(true);
      }
    }
  }

  private ListPanel selectionPanel = null;
  private ListPanel globalPanel = null;
  private JButton add = null;
  private JButton remove = null;
  private boolean removing = false;
  private boolean adding = false;

  /**
   * Constructeur
   *
   * @param Language Dictionnaire
   * @param int Orientation
   * @exception PropertyVetoException Exception liée à la validité du dictionnaire
   */
  public SelectionListsPanel(Language lang, int orientation) throws PropertyVetoException {
    if (lang == null) {
      throw new IllegalArgumentException(getClass().getName() +
       "." + getClass().getName() + "(Language)");
    }

    initializePanel(lang, orientation);
  }

  /**
   * Non disponible
   *
   * @exception IllegalAccessError Exception liée a la non implementation
   */
  public MimeEntry[] getMimeType() {
    throw new IllegalAccessError(getClass().getName() +
      ".getMimeType(), not used !");
  }

  public ListPanel getSelectionPanel() { return selectionPanel; }

  public JList getSelectionList() { return getSelectionPanel().getList(); }

  public JList getGlobalList() { return getGlobalPanel().getList(); }

  public ListPanel getGlobalPanel() { return globalPanel; }

  private void initializePanel(Language language, int orientation)
    throws PropertyVetoException {

    LanguageObject lang = null;

    selectionPanel = new ListPanel();
    remove = new JButton();
    lang = language.get("Remove", remove);
    selectionPanel.getContentPanel().add(remove, BorderLayout.SOUTH);

    globalPanel = new ListPanel();
    add = new JButton();
    lang = language.get("Add", add);
    globalPanel.getContentPanel().add(add, BorderLayout.SOUTH);

    JSplitPane splitPane = new JSplitPane(
      orientation,
      selectionPanel.getContentPanel(),
      globalPanel.getContentPanel()
    );

    splitPane.setContinuousLayout(true);
    splitPane.setDoubleBuffered(true);
    splitPane.setOneTouchExpandable(true);

    setContentComponent(splitPane);
  }

   public void addActionListener(ActionListener l) {
    super.addActionListener(l);

    selectionPanel.addActionListener(l);
    globalPanel.addActionListener(l);

    add.addActionListener(l);
    remove.addActionListener(l);

    JList list = (JList)selectionPanel.getContentComponent();
    list.setDragEnabled(true);
    list.setDropTarget(
      new DropTarget(
        list,
        new DefaultSelectionListTargetListener(l)
      )
    );

    list = (JList)globalPanel.getContentComponent();
    list.setDragEnabled(true);
    list.setDropTarget(
      new DropTarget(
        list,
        new DefaultGlobalListTargetListener(l)
      )
    );
  }

  public void removeActionListener(ActionListener l) {
    super.removeActionListener(l);

    add.removeActionListener(l);
    remove.removeActionListener(l);

    selectionPanel.removeActionListener(l);
    globalPanel.removeActionListener(l);

    JList list = (JList)selectionPanel.getContentComponent();
    list.setDropTarget(null);

    list = (JList)globalPanel.getContentComponent();
    list.setDropTarget(null);
  }

  public static void main(String[] args) {
    try {
    javax.swing.JFrame f = new javax.swing.JFrame();
    SelectionListsPanel p = new SelectionListsPanel(new Language(), JSplitPane.HORIZONTAL_SPLIT);

    p.setTitle("Test");
    p.getGlobalPanel().setTitle("Global");
    p.getSelectionPanel().setTitle("Selection");



    p.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        System.out.println(e);
      }
    });

    JList list = p.getGlobalList();
    list.setListData(new String[] { "item1" });

    list = p.getSelectionList();
    list.setListData(new String[] { "item2", "item3" });

    f.getContentPane().add(p.getContentPanel());
    f.pack();
    f.show();
    } catch (Exception e) { e.printStackTrace(); }
  }
}