/*
 * TouchGraph LLC. Apache-Style Software License
 *
 *
 * Copyright (c) 2002 Alexander Shapiro. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. 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.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by 
 *        TouchGraph LLC (http://www.touchgraph.com/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "TouchGraph" or "TouchGraph LLC" must not be used to endorse 
 *    or promote products derived from this software without prior written 
 *    permission.  For written permission, please contact 
 *    alex@touchgraph.com
 *
 * 5. Products derived from this software may not be called "TouchGraph",
 *    nor may "TouchGraph" appear in their name, without prior written
 *    permission of alex@touchgraph.com.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 TOUCHGRAPH OR ITS 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.
 * ====================================================================
 *
 */

package com.touchgraph.graphlayout.interaction;

import  com.touchgraph.graphlayout.*;

import  javax.swing.*;
import  javax.swing.event.*;
import  java.awt.Font;
import  java.awt.event.*;
import  java.applet.*;
import  java.io.*;
import  java.util.*;

/** GLEditUI:  User Interface for editing the graph.
  *
  * @author   Alexander Shapiro
  * @version  1.20
  */
public class GLEditUI extends TGUserInterface {

    /** True when the current UI is active. */
    
    TGPanel tgPanel;
    DragAddUI dragAddUI;
    DragNodeUI dragNodeUI;
    DragMultiselectUI dragMultiselectUI;
    TGAbstractClickUI switchSelectUI;
    TGAbstractDragUI hvDragUI;

    GLEditMouseListener ml;
    GLEditMouseMotionListener mml;

    JPopupMenu nodePopup;
    JPopupMenu edgePopup;
    JPopupMenu backPopup;
    Node popupNode;
    Edge popupEdge;

    AbstractAction deleteSelectAction;
    final KeyStroke deleteKey = KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, 0);

  // ............

   /** Constructor with TGPanel <tt>tgp</tt>.
     */
    public GLEditUI( TGPanel tgp ) {
        active = false;
        tgPanel = tgp;

        ml = new GLEditMouseListener();
        mml = new GLEditMouseMotionListener();

        deleteSelectAction = new AbstractAction("DeleteSelect") {
            public void actionPerformed(ActionEvent e) {
                Node select = tgPanel.getSelect();
                if(select!=null) {
                    tgPanel.deleteNode(select);
                    tgPanel.repaint();
                }
            }
        };

        dragAddUI = new DragAddUI(tgPanel);
        dragNodeUI = new DragNodeUI(tgPanel);
        dragMultiselectUI = new DragMultiselectUI(tgPanel);
        switchSelectUI = tgPanel.getSwitchSelectUI();

        setUpNodePopup();
        setUpEdgePopup();
        setUpBackPopup();
    }

    public GLEditUI( GLPanel glPanel ) {
        this(glPanel.getTGPanel());
        hvDragUI = glPanel.hvScroll.getHVDragUI();
    }

    public void activate() {
        tgPanel.addMouseListener(ml);
        tgPanel.addMouseMotionListener(mml);
        tgPanel.getActionMap().put("DeleteSelect", deleteSelectAction);
        ComponentInputMap cim = new ComponentInputMap(tgPanel);
        cim.put(deleteKey, "DeleteSelect");
        tgPanel.setInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW, cim);
        active = true;
    }

    public void deactivate() {
        //A hack.  Want to prevent dragMultiselect from remaining active when user switches to
        //navigate mode.  Keeping an "active" variable resolves some comlex issues with the flow
        //of controll, caused by dragMultiselect calling it's parents deactivate method when it
        //is activated.
        if (!active) dragMultiselectUI.deactivate();

        tgPanel.removeMouseListener(ml);
        tgPanel.removeMouseMotionListener(mml);
        tgPanel.getInputMap().put(deleteKey, null);
        tgPanel.getActionMap().put("DeleteSelect", null);
        active = false;
    }

    class GLEditMouseListener extends MouseAdapter {
        public void mousePressed(MouseEvent e) {
            Node mouseOverN = tgPanel.getMouseOverN();
            Node select = tgPanel.getSelect();


            if (e.getModifiers() == MouseEvent.BUTTON1_MASK) {
                if (mouseOverN != null) {
                    if(mouseOverN!=select)
                        dragNodeUI.activate(e);
                    else
                        dragAddUI.activate(e);
                }
                else
                    if(hvDragUI!=null) hvDragUI.activate(e);
            }

        }

        public void mouseClicked(MouseEvent e) {
            if (e.getModifiers() == MouseEvent.BUTTON1_MASK)
                switchSelectUI.activate(e);

        }

        public void mouseReleased(MouseEvent e) {
              if (e.isPopupTrigger()) {
                   popupNode = tgPanel.getMouseOverN();
                   popupEdge = tgPanel.getMouseOverE();
                   if (popupNode!=null) {
                       tgPanel.setMaintainMouseOver(true);
                    nodePopup.show(e.getComponent(), e.getX(), e.getY());
                }
                else if (popupEdge!=null) {
                    tgPanel.setMaintainMouseOver(true);
                    edgePopup.show(e.getComponent(), e.getX(), e.getY());
                }
                else {
                    backPopup.show(e.getComponent(), e.getX(), e.getY());
                }
               }
         }
    }

    class GLEditMouseMotionListener extends MouseMotionAdapter {
        public void mouseMoved(MouseEvent e) {
            //tgPanel.startDamper();
        }
    }

    private void setUpNodePopup() {
        nodePopup = new JPopupMenu();
        JMenuItem menuItem;
        JMenu navigateMenu = new JMenu("Navigate");

        menuItem = new JMenuItem("Delete Node");
        ActionListener deleteNodeAction = new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    if(popupNode!=null) {
                        tgPanel.deleteNode(popupNode);
                    }
                }
            };

        menuItem.addActionListener(deleteNodeAction);
        nodePopup.add(menuItem);

        menuItem = new JMenuItem("Expand Node");
        ActionListener expandAction = new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    if(popupNode!=null) {
                        tgPanel.expandNode(popupNode);
                    }
                }
            };

        menuItem.addActionListener(expandAction);
        navigateMenu.add(menuItem);

        menuItem = new JMenuItem("Hide Node");
        ActionListener hideAction = new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    Node select = tgPanel.getSelect();
                    if(popupNode!=null) {
                        tgPanel.hideNode(popupNode, select);
                    }
                }
            };

        menuItem.addActionListener(hideAction);
        navigateMenu.add(menuItem);

        nodePopup.add(navigateMenu);

        nodePopup.addPopupMenuListener(new PopupMenuListener() {
            public void popupMenuCanceled(PopupMenuEvent e) {}
            public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
                tgPanel.setMaintainMouseOver(false);
                tgPanel.setMouseOverN(null);
                tgPanel.repaint();
            }
            public void popupMenuWillBecomeVisible(PopupMenuEvent e) {}
        });

    }

    private void setUpEdgePopup() {
        edgePopup = new JPopupMenu();
        JMenuItem menuItem;

        menuItem = new JMenuItem("Relax Edge");
        ActionListener relaxEdgeAction = new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    if(popupEdge!=null) {
                        popupEdge.setLength(popupEdge.getLength()*4);
                        tgPanel.resetDamper();
                    }
                }
            };
        menuItem.addActionListener(relaxEdgeAction);
        edgePopup.add(menuItem);

        menuItem = new JMenuItem("Tighten Edge");
        ActionListener tightenEdgeAction = new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    if(popupEdge!=null) {
                        popupEdge.setLength(popupEdge.getLength()/4);
                        tgPanel.resetDamper();
                    }
                }
            };
        menuItem.addActionListener(tightenEdgeAction);
        edgePopup.add(menuItem);

        menuItem = new JMenuItem("Delete Edge");
        ActionListener deleteEdgeAction = new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    if(popupEdge!=null) {
                        tgPanel.deleteEdge(popupEdge);
                    }
                }
            };
        menuItem.addActionListener(deleteEdgeAction);
        edgePopup.add(menuItem);

        edgePopup.addPopupMenuListener(new PopupMenuListener() {
            public void popupMenuCanceled(PopupMenuEvent e) {}
            public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
                tgPanel.setMaintainMouseOver(false);
                tgPanel.setMouseOverE(null);
                tgPanel.repaint();
            }
            public void popupMenuWillBecomeVisible(PopupMenuEvent e) {}
        });
    }

    private void setUpBackPopup() {
        backPopup = new JPopupMenu();
        JMenuItem menuItem;

        menuItem = new JMenuItem("Multi-Select");
        ActionListener multiselectAction = new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    dragMultiselectUI.activate(GLEditUI.this);
                }
            };
        menuItem.addActionListener(multiselectAction);
        backPopup.add(menuItem);

        menuItem = new JMenuItem("Start Over");
        ActionListener startOverAction = new ActionListener() {
                public void actionPerformed( ActionEvent e ) {
                    tgPanel.clearAll();
                    tgPanel.clearSelect();
                    try {
                        tgPanel.addNode();
                    } catch ( TGException tge ) {
                        System.err.println(tge.getMessage());
                        tge.printStackTrace(System.err);
                    }
                    tgPanel.fireResetEvent();
                    tgPanel.repaint();
                }
            };
        menuItem.addActionListener(startOverAction);
        backPopup.add(menuItem);
    }

} // end com.touchgraph.graphlayout.interaction.GLEditUI