/*****************************************************************************
 SelectorTest

 An application to test the ObjectList class, with different mouse sensitive
 areas within each item.

 bruce.miller@nist.gov
 Contribution of the National Institute of Standards and Technology,
 not subject to copyright.
******************************************************************************/

package test;
import java.applet.*;
import java.awt.*;
import java.util.*;
import gui.*;
import util.*;

public class SelectorTest extends Applet {
  SelectionList selector;
  int nSelections = 20;

  public void init() {
    setLayout(new BorderLayout());
    Label label = new Label("ObjectList Demo & Tester");
    label.setFont(new Font("Helvetica",Font.BOLD,14));
    add("North",label);
    add("Center",selector = new SelectionList(this,50,15));
    for(int i=0; i< nSelections; i++)
      selector.addItem(new Selection(Format.US(i)));    
  }
}

class Selection {
  String name;
  int state;
  static final int IGNORE  = 0;
  static final int REQUIRE = 1;
  static final int FORBID  = 2;
  static final String descriptor[] = {"ignore","require","forbid"};

  Selection(String name) {
    this.name = name; }
  
  void toggleRequire() {
    state = (state == REQUIRE ? IGNORE : REQUIRE); }

  void toggleForbid() {
    state = (state == FORBID ? IGNORE : FORBID); }

  void toggle(int type) {
    switch (type) {
      case REQUIRE : toggleRequire(); break;
      case FORBID  : toggleForbid(); break; }}
}

class  SelectionList extends ObjectList {
  Applet applet;

  SelectionList(Applet applet, int width, int height) {
    super(width,height); 
    this.applet = applet; }

  public String getString(Object item) {
    return  ((Selection) item).name; }

  void drawFigure(Graphics g, int corners[][], int x, int y, boolean filled) {
    g.translate(x,y);
    if (filled)  {
      g.setColor(Color.red);
      g.fillPolygon(corners[0],corners[1],corners[0].length);  }
    g.setColor(Color.black);
    g.drawPolygon(corners[0],corners[1],corners[0].length); 
    g.translate(-x,-y);
  }

  int figureWidth = 14,
      figureHeight = 14;
  int cross[][] = {{2,7,12,14,9,14,12,7,2,0,5,0,2},
		   {0,5,0,2,7,12,14,9,14,12,7,2,0}};
  int check[][] = {{4,14,4,2,0,4},
		   {14,0,10,6,10,14}};

  int x0 = 0,			// where the Require widget goes
      x1 = x0+2+figureWidth,	// where the Forbit widget goes
      x2 = x1 +2 + figureWidth;	// where the string goes.

  int mouseZone(Event e) {
    int x = e.x-itemBounds(e.arg).x;
    return ((x0 < x) && (x < x1) ? Selection.REQUIRE :
	    (x1 < x) && (x < x2) ? Selection.FORBID  :
	    Selection.IGNORE); }

  public Dimension paintItem(Graphics g, Object item) {
    Selection s = (Selection) item;
    String name = s.name;
    int state = s.state;
    FontMetrics m = getFontMetrics(getFont());
    int h = Math.max(figureHeight,m.getHeight());
    int y = Math.max(figureHeight,h-m.getDescent());
    if (g != null) {
      drawFigure(g,check,x0,0,state==Selection.REQUIRE);
      drawFigure(g,cross,x1,0,state==Selection.FORBID);
      g.drawString(name,x2,y); }
    return new Dimension(x2 + m.stringWidth(name),h+2); }

  void highlightZone(Selection s, int zone) {
    Rectangle p = itemBounds(s);
    switch (zone) {
    case Selection.REQUIRE : 
      highlightRect(p.x+x0,p.y,figureHeight,figureWidth); break;
    case Selection.FORBID  : 
      highlightRect(p.x+x1,p.y,figureHeight,figureWidth); break; }}

  int prevZone = 0;  

  String opString(Selection s, int zone) {
    return (s.state == zone ? "un" : "") + 
      Selection.descriptor[zone] + " feature " + s.name; }

  public boolean handleEvent(Event e) {
    if ((e.id == Event.LIST_SELECT) || (e.id == Event.ACTION_EVENT)) {
      deselect(e.arg);
      ((Selection) e.arg).toggle(mouseZone(e));
      repaint(); }
    else if (e.id == ObjectList.MOUSE_EXIT_ITEM) {
      applet.showStatus(""); 
      highlightZone((Selection) e.arg, prevZone); }
    else if (e.id == ObjectList.MOUSE_ENTER_ITEM) {
      Selection s = (Selection) e.arg;
      int zone = mouseZone(e);
      highlightZone(s, prevZone = zone); 
      applet.showStatus(opString(s,zone));  }
    else if (e.id == ObjectList.MOUSE_MOVE_ITEM) {
      Selection s = (Selection) e.arg;
      int zone = mouseZone(e);
      if (zone != prevZone) {
	highlightZone(s,prevZone);
	highlightZone(s,prevZone = zone);
	applet.showStatus(opString(s,zone));  }}
    else return super.handleEvent(e);
    return true; }



}