/** 
  * Route selector for Rob's Moving Map package
  * @author Robert J Morton
  * @version 27 November 1997
*/
/*  This class contains a drop-down menu object for choosing
    which of the three routes is to be flown. */

import javax.swing.*;     // Java Swing GUI utilities
import java.awt.*;        // Java Abstract Windowing Toolkit
import java.awt.event.*;  // for the new-fangled 1.1 event handling

public class selwp {
  private static selwp ws;  // reference to waypoint selector object
  private butpanel bp;      // reference to button panel object
  private airmap am;        // reference to air map object
  private navpanel np;      // reference to nav panel object
  private loader ld;        // reference to the loader object
  private movmap mm;        // object reference to the main applet
  private msgpanel mp;      // object reference to message panel

  private JComboBox<String>
    waypoints;        // reference for this checkbox group
  private String
    WaypointNames[];  // up to 1000 waypoints provided for

  private boolean
    WaypointsInstalled = false;

  private int 
    wn = 0,    // waypoint number
    Wx = 305,  // x-coord of top left corner of waypoint selector
    Wy = 380,  // y-coord of top left corner of waypoint selector
    Ww = 300,  // width of waypoint selector
    Wh =  35;  // height of waypoint selector


  // construct the radio button panel
  selwp(movmap mm, Container cp, msgpanel mp, butpanel bp) {

    this.mm = mm;  // local variable for object reference to main applet
    this.mp = mp;  // message panel reference
    this.bp = bp;  // reference to the button panel object
    ws = this;     // set reference to route selector object

    // create waypoint selector choice menu    
    waypoints = new JComboBox<String>();

    cp.add(waypoints);  // add it to the applet's content pane
    waypoints.setBounds(Wx,Wy,Ww,Wh);  // set its position and size

    //create and register an event listener for this choice menu
    waypoints.addItemListener(new wslisten(wslisten.WAYPOINT, this));
  }


  void setAirmap(airmap am) {this.am = am;}
  void setNavpanel(navpanel np) {this.np = np;}
  void setLoader(loader ld) {this.ld = ld;}


  // x is the number of waypoints in the selected route
  void clearWaypoints(int x) {

    // create a string array to hold the waypoint names
    WaypointNames = new String[x];

    wn = 0;  // set its access index to point to the first name
  }


  void addWaypoint(String s) {WaypointNames[wn++] = s;}


  // copy route names from array RouteNames[] to Choice Menu
  void installWaypoints() {
    WaypointsInstalled = false;
    try {
      SwingUtilities.invokeLater(
        new Runnable() {
          public void run() { 
            install();
          }
        }
      );
    } catch (Exception e) { } 
  }


  // copy route names from array RouteNames[] to Choice Menu
  private void install() {
    waypoints.removeAllItems();
    for(int i = 0; i < wn; i++)
      waypoints.addItem(WaypointNames[i]);
    waypoints.setSelectedIndex(0);
    WaypointsInstalled = true;
  }


  void waypointSelect() {  // A ROUTE HAS JUST BEEN SELECTED

    /* NOTE: these two boolean conditions are set on
    different threads. That's why both are necessary. */

    if(ld.DefaultsLoaded() && WaypointsInstalled) { 

      bp.pause();  // pause flight by killing RunFlag in butpanel
      bp.Relabel(false);  // set label of start button
      mp.showMsg("Flight paused.",true,false);
      route.getCurrent().setThis(waypoints.getSelectedIndex());
      am.atualizar();  // update the air map
      np.atualizar();  // update the nav info panel
    }
  }
}



// LISTENS FOR EVENTS FROM THE CHOICE MENU SELECTORS
class wslisten implements ItemListener {
  static final int
    WAYPOINT = 0;  // an event from the 'Stations' Choice Menu
  int id;          // one of the above events
  selwp ws;        // the application that called: always the above applet!

  // constructor for a new Choice selection event
  public wslisten(int id, selwp ws) {
    this.id = id;  // set the id number for this instance of 'rslisten'
    this.ws = ws;  // set the reference to the instance of the 'hfbrx' applet
  }                // from which it came. (there will only be one instance).

  // a Choice selection event has occurred from checkbox 'id'
  public void itemStateChanged(ItemEvent e) {
    switch(id) {
      case WAYPOINT:
        ws.waypointSelect();  // Execute this method in the above applet
    }
  }
}