/** 
  * Route Search Panel
  * @author Robert J Morton YE572246C
  * @version 04 December 2007
  * @copyright Robert J Morton (all rights reserved) */

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


class findroute {
  private int
    SearchIndex = 0,    // list number of route name we have searched up to

    Tx = 305, Ty = 15,  // top left corner of text field on applet panel
    Tw = 224, Th = 35,  // Text field width and height

    Bx = 533, By = 15,  // top left corner of Search button on applet panel
    Bw = 72, Bh = 35;   // Search button width and height

  private String SearchString = "";  // search string for finding a route name
  private JTextField FindRoute; // ref for text field for route search engine
  private Label FindLab;        // reference for the 'Find' button's label
  private JButton FindBut;      // button to go to next waypoint in the list
  private Font font, font2;     // refs for large and small fonts
  private FontMetrics fm, fm2;  // typeface dimensions for the above fonts
  private movmap mm;            // reference to the parent applet class
  private routesel rs;          // reference to the route selector class


  findroute(movmap mm, Container cp, routesel rs) {
    this.mm = mm;  // context reference of calling applet
    this.rs = rs;  // reference of route selector object

    FindRoute = new JTextField("Enter a route name."); 
    cp.add(FindRoute); 
    FindRoute.setBounds(Tx, Ty, Tw, Th); 
    FindRoute.addActionListener(new frlisten(frlisten.FINDROUTE, this));

    FindBut = new JButton("Search"); 
    cp.add(FindBut); 
    FindBut.setBounds(Bx,By,Bw,Bh);
    FindBut.setMargin(new Insets(3,3,3,3));
    FindBut.addActionListener(new frlisten(frlisten.FINDBUT,this));
  }


  void findRoute() {   //start/resume search from SearchIndex value

    String s = FindRoute.getText().trim().toLowerCase();

    /* If new search string is different from last time's search string,
    update search string and reset search index to start of list. */

    if(!SearchString.equals(s)) {
      SearchString = s;
      SearchIndex = 0;
    }
    /* Get the number of route names in the list 
    and the item after where we got to last time. */

    int I = rs.getTotalRoutes(), i = SearchIndex;

    // For as many routes as there are in the list, get the next route name
    for(int k = 0; k < I; k++) {
      s = rs.getRouteName(i);

      /* If the search string was found in this route name, select
      the route name, mark from where to start searching next time,
      clear possible 'not found' message from last time and select
      the current route and exit. */

      if(s.indexOf(SearchString) != -1) {
        rs.selectRouteName(i);
        SearchIndex = i + 1;
        mm.showStatus("");
        rs.routeSelect();
        return;
      } else if(++i >= I)  // Otherwise loop index back
        i = 0;             // to beginning if necessary.
    }
    mm.showStatus("Search string not found in any route name.");
  }
}



//LISTENS FOR EVENTS FROM THE BUTTONS
class frlisten implements ActionListener {
  static final int 
    FINDROUTE = 1,    //'route search text field' event
    FINDBUT = 2;      //'route search button pressed' event
  int id;              //one of the above
  findroute ap;        //the application that called: always the above panel

  // constructor for a new command
  public frlisten(int id, findroute ap) { this.id = id; this.ap = ap; }

  // one of the buttons has been clicked
  public void actionPerformed(ActionEvent e) {
    switch(id) {         // id of this instance of ActionEvent
      case FINDROUTE:
        ap.findRoute();  // it was the 'find' field C/R
        break;
      case FINDBUT:
        ap.findRoute();  // it was the 'find' button
    }
  }
}