/** This class creates the components of the User Interface Panel. It handles the events that include changes made to any of the input fields.  **/
class InterfacePanel extends Panel
{
  Choice choice;
  // Labels used in the Interface
  Label choiceLabel,label,xcoor,ycoor,zcoor,distance,blob1,Xlabel,Ylabel,Zlabel,UDefLabel,Xlabel2,Ylabel2,Zlabel2,Ulabel3,blank1,blank2,blank3,blank4,blob2;
  // Textfields used in the interface
  TextField dxvalue,dyvalue,dzvalue,radius1,radius2,VtextFieldRes,XtextField,YtextField,ZtextField;
  CheckboxGroup cbg;
  Checkbox cb1,cb2;
  PSPA mycontroller;
 
 public InterfacePanel(PSPA panelControl)
 {
  super();
  mycontroller = panelControl;
 
  // Instantiate the components
  Range();
  PopupMenu();
  UserDef();
 
 
  //Add Components to the Applet
  //Set the Layout Manager and constraints
  GridBagLayout gridbag = new GridBagLayout();
  GridBagConstraints c = new GridBagConstraints();
  setLayout(gridbag);

  c.fill = GridBagConstraints.BOTH;
 
  // Add the title to the Applet
  Label Title = new Label("BLOBBY MODEL EXAMPLE",Label.CENTER);
  c.gridwidth = GridBagConstraints.REMAINDER;
  gridbag.setConstraints(Title, c);
  add(Title);
  Label TSpace = new Label();
  gridbag.setConstraints(TSpace, c);
  add(TSpace);

  // Add labels for titles of range control panel
  c.gridwidth = 1;
  c.weightx = 1.0;
 
  Label Space = new Label();
  gridbag.setConstraints(Space, c);
  add(Space);
  Label Space1 = new Label();
  gridbag.setConstraints(Space1, c);
  add(Space1);
  gridbag.setConstraints(xcoor, c);
  add(xcoor);
  Label Space2 = new Label();
  gridbag.setConstraints(Space2, c);
  add(Space2);
  gridbag.setConstraints(ycoor, c);
  add(ycoor);
  Label Space3 = new Label();
  gridbag.setConstraints(Space3, c);
  add(Space3);
  c.gridwidth = GridBagConstraints.RELATIVE;
  gridbag.setConstraints(zcoor, c);
  add(zcoor);
  Label Rlabel4 = new Label();
  c.gridwidth = GridBagConstraints.REMAINDER;
  gridbag.setConstraints(Rlabel4, c);
  add(Rlabel4);

  c.gridwidth = 1;
  Label USpace = new Label();
  gridbag.setConstraints(USpace, c);
  add(USpace);
  gridbag.setConstraints(distance, c);
  add(distance);
  c.weightx = 1.0;
  gridbag.setConstraints(dxvalue, c);
  add(dxvalue);
  gridbag.setConstraints(blank1, c);
  add(blank1);
  gridbag.setConstraints(dyvalue, c);
  add(dyvalue);
  gridbag.setConstraints(blank2, c);
  add(blank2);
  c.gridwidth = GridBagConstraints.RELATIVE;
  gridbag.setConstraints(dzvalue, c);
  add(dzvalue);
  Label distance1 = new Label();
  c.gridwidth = GridBagConstraints.REMAINDER;
  gridbag.setConstraints(distance1, c);
  add(distance1);

  c.gridwidth = 1;
  Label VSpace = new Label();
  gridbag.setConstraints(VSpace, c);
  add(VSpace);
  gridbag.setConstraints(blob1, c);
  add(blob1);
  gridbag.setConstraints(radius1, c);
  add(radius1);
  gridbag.setConstraints(blank3, c);
  add(blank3);
  gridbag.setConstraints(blank4, c);
  add(blank4);
  gridbag.setConstraints(blob2, c);
  add(blob2);
  gridbag.setConstraints(radius2, c);
  add(radius2);

  c.gridwidth = GridBagConstraints.RELATIVE;
 
  Label Vlabel1 = new Label();
  c.gridwidth = GridBagConstraints.REMAINDER;
   gridbag.setConstraints(Vlabel1, c);
  add(Vlabel1);
 
  Label Vlabel2 = new Label();
  gridbag.setConstraints(Vlabel2, c);
  add(Vlabel2);
 
  Ulabel3 = new Label("",Label.CENTER);
  c.fill = GridBagConstraints.HORIZONTAL;

 }
 
 
  //Create the components for the UV range control
  void Range()
  {
    xcoor = new Label("X-coordinate");
    ycoor = new Label("Y-coordinate");
    zcoor = new Label("Z-coordinate");
    distance = new Label("Distance");
    blob1 = new Label("Blob1's radius");
 blob2 = new Label("Blob2's radius");
    blank1 = new Label(" ");
    blank2 = new Label(" ");
    blank3 = new Label(" ");
    blank4 = new Label(" ");
 
    dxvalue = new TextField(3);
    dxvalue.setEditable(true);
    dyvalue = new TextField(3);
    dyvalue.setEditable(true);
    dzvalue = new TextField(3);
    dzvalue.setEditable(true);

    radius1 = new TextField(3);
    radius1.setEditable(true);
    radius2 = new TextField(3);
    radius2.setEditable(true);
  }
 
  //Create the components for the Choice Menu of predefined surfaces
  void PopupMenu()
  {
    cbg = new CheckboxGroup();
    cb1 = new Checkbox("Pre-defined surfaces", cbg, true);
    cb2 = new Checkbox("User-defined surfaces", cbg, false);
 
    choice = new Choice();
    addChoice(choice, "Sphere");
    addChoice(choice, "Torus");
    addChoice(choice, "Ellipsoid");
  }
 
 public void addChoice(Choice popup, String title)
 {
  popup.addItem(title);
 }
 
 
  //Create the components for the entry of user-defined surfaces
  void UserDef()
  {
    //p2 = new Panel();
 
    Xlabel = new Label("X-Coordinate");
    Ylabel = new Label("Y-Coordinate");
    Zlabel = new Label("Z-Coordinate");
 
    XtextField = new TextField(30);
    YtextField = new TextField(30);
    ZtextField = new TextField(30);
 
  }
 
  // Interpret the various events and execute appropriate actions
public boolean action(Event e, Object arg)
{
  double value = 0;
  int res = 0;
 
  // action for text fields
  if (e.target instanceof TextField)
  {
    mycontroller.dx = Integer.parseInt(dxvalue.getText());
    mycontroller.dy = Integer.parseInt(dyvalue.getText());
    mycontroller.dz = Integer.parseInt(dzvalue.getText());

    mycontroller.r1 = Integer.parseInt(radius1.getText());
    mycontroller.r2 = Integer.parseInt(radius2.getText());

 mycontroller.draw(e, 1);

  }
  return true;
}

}