/* Copyright 2000 Charles G. Wright
 * This software may be distributed under the terms of the
 * GNU General Public License.
 *
 * $Id: CWselect.java,v 1.1 2000-06-15 10:14:54-05 chuckles Exp chuckles $
 */

import java.awt.*;
import java.awt.event.*;
import java.io.*;

/** This class implements a selector with buttons to increment/decrement selection */
class CWselect extends Panel implements ActionListener, ItemListener{

  Label lab;
  Button up;
  Button down;
  Choice sel;
  int maxIndex;
  ActionListener parent;
  boolean wrap_up = false;
  boolean wrap_down = false;
  ActionEvent ae;

  public CWselect(String[] choices, String label, int init_value){
    lab = new Label(label);
    down = new Button("<");
    up = new Button(">");
    sel = new Choice();
    for (int i = 0; i < choices.length; i++) sel.addItem(choices[i]);
    sel.select(init_value);
    maxIndex = sel.getItemCount() - 1;
    this.parent = parent;
    up.addActionListener(this);
    down.addActionListener(this);
    sel.addItemListener(this);
    add(lab);
    add(down);
    add(sel);
    add(up);

    ae = new ActionEvent(this, 0, label);

    //drawRect(0, 0, Component.getSize().width, Component.getSize().height);
  }
  
  // returns the value in the text box of the selectGizmo
  public int getSelectedIndex(){
    return(sel.getSelectedIndex());
  }

  public void setMaxIndex(int i){
    maxIndex = i;
    //System.out.println("Setting max index to " + i);
    if(sel.getSelectedIndex() > maxIndex) sel.select(maxIndex);
  }
  
  public void incrementIndex(){
    int i;
    if ((i = sel.getSelectedIndex()) < maxIndex){
      sel.select(i+1);
      wrap_up = false;
    } else {
      sel.select(0);
      wrap_up = true;
    }
  }

  public void decrementIndex(){
    int i;
    if ((i = sel.getSelectedIndex()) > 0){
      sel.select(i - 1);
      wrap_down = false;
    } else {
      sel.select(maxIndex);
      wrap_down = true;
    }
  }

  // This method is called after this object is created,
  // to register the object that provides the actionPerformed()
  // method. I might have just passed "parent" in the
  // constructor, but this gives the flexibility to
  // put the event handler elsewhere, such as in a
  // central event handler object.

  public void addActionListener(ActionListener parent){
    this.parent = parent;
  }

  public void actionPerformed(ActionEvent e){
    Object source = e.getSource();
    int i = sel.getSelectedIndex();
    if (source == up) {
      incrementIndex();
      //System.out.println("getting ready to update");
      //System.out.println(parent);
      //System.out.println(this);
      //parent.updateSomething(this);
      parent.actionPerformed(ae);
    }
    if (source == down){
      decrementIndex();
      //parent.updateSomething(this);
      parent.actionPerformed(ae);
    }
  }

  public void itemStateChanged(ItemEvent e){
    //parent.updateSomething(this);
    parent.actionPerformed(ae);
    //System.out.println("select box changed");
  }
}