import java.awt.*;

public class MandelControl extends Frame
{
   double xMin, xMax, yMin, yMax;
   int    iter;
   int    pixel;

   TextField xMinField  = new TextField(9);
   TextField xMaxField  = new TextField(9);
   TextField yMinField  = new TextField(9);
   TextField yMaxField  = new TextField(9);
   TextField iterField  = new TextField(5);
   TextField pixelField = new TextField(5);

   Button    Okay   = new Button("Okay");
   Button    Cancel = new Button("Cancel");
   Button    Apply  = new Button("Apply");
   Mandel    master;

   public MandelControl(Mandel _master,
                       double _xMin, double _xMax,
                       double _yMin, double _yMax,
                       int    _iter, int    _pixel)
  {
      super("Mandelbrot Controls");
      master = _master;
      setParams(_xMin,_xMax,_yMin,_yMax,_iter,_pixel);

      Panel ButtonRow = new Panel();
      ButtonRow.setLayout(new FlowLayout());
      ButtonRow.add(Okay);
      ButtonRow.add(Apply);
      ButtonRow.add(Cancel);

      Panel Row1 = new Panel();
      Row1.setLayout(new FlowLayout());
      Row1.add(new Label("xMin:"));
      Row1.add(xMinField);
      Row1.add(new Label("xMax:"));
      Row1.add(xMaxField);

      Panel Row2 = new Panel();
      Row2.setLayout(new FlowLayout());
      Row2.add(new Label("yMin:"));
      Row2.add(yMinField);
      Row2.add(new Label("yMax:"));
      Row2.add(yMaxField);

      Panel Row3 = new Panel();
      Row3.setLayout(new FlowLayout());
      Row3.add(new Label("# of iterations:"));
      Row3.add(iterField);

      Panel Row4 = new Panel();
      Row4.setLayout(new FlowLayout());
      Row4.add(new Label("Size of pixels:"));
      Row4.add(pixelField);

      setLayout(new GridLayout(5,1,5,5));
      add(Row1);
      add(Row2);
      add(Row3);
      add(Row4);
      add(ButtonRow);
   
      validate();
      pack();
      resize(preferredSize());  
   }
/* =========================================================== */
   public void setParams(double _xMin, double _xMax,
                         double _yMin, double _yMax,
                         int    _iter, int    _pixel)
   {
      xMin  = _xMin;
      xMax  = _xMax;
      yMin  = _yMin;
      yMax  = _yMax;
      iter  = _iter;
      pixel = _pixel;
      xMinField.setText (String.valueOf(_xMin));
      xMaxField.setText (String.valueOf(_xMax));
      yMinField.setText (String.valueOf(_yMin));
      yMaxField.setText (String.valueOf(_yMax));
      iterField.setText (String.valueOf(_iter));
      pixelField.setText(String.valueOf(_pixel));
   }
/* =========================================================== */
   private void handleOkay()
   {
      try
      {
         xMin  = Double.valueOf(xMinField.getText().trim()).doubleValue();
         xMax  = Double.valueOf(xMaxField.getText().trim()).doubleValue();
         yMin  = Double.valueOf(yMinField.getText().trim()).doubleValue();
         yMax  = Double.valueOf(yMaxField.getText().trim()).doubleValue();
         iter  = Integer.parseInt(iterField.getText().trim());
         pixel = Integer.parseInt(pixelField.getText().trim());
         master.setDrawingParams(xMin,xMax,yMin,yMax,iter,pixel);
      }
      catch(NumberFormatException e)
      {
         setParams(xMin, xMax, yMin, yMax, iter, pixel);
      }
   }

/* =========================================================== */
   public boolean handleEvent(Event e)
   {
      if (e.id == Event.WINDOW_DESTROY)
      {
         hide();
         return true;
      }
      else
         return super.handleEvent(e);
   }
/* =========================================================== */
   public boolean action(Event e, Object arg)
   {
      if (e.target == Okay)
      {
         handleOkay();
         hide();
         return true;
      }
      else if (e.target == Apply)
      {
         handleOkay();
         return true;
      }
      if (e.target == Cancel)
      {
         hide();
         return true;
      }
      else
         return false;
   }
}