//
// PointDrag.java
//


import visad.*;
import visad.util.*;
import visad.java3d.*;
import visad.bom.*;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.rmi.*;
import java.net.MalformedURLException;


public class PointDrag {

  /** type 'java PointDrag' to run */
  public static void main(String args[])
         throws VisADException, RemoteException {
    // construct PointDrag application
    PointDrag etch = new PointDrag(args);

    // construct arrays to hold display and data:w
    DisplayImpl[] displays = new DisplayImpl[1];
    DataReference[] refs = new DataReference[1];

    // set up data and display for stand-alone
    etch.setupServer(displays, refs);

    // set up user interface
    setupUI(displays, refs);
  }

  // constructor does nothing:
  //   all the work is done in setupServer and setupUI
  public PointDrag(String args[])
         throws VisADException, RemoteException {
  }

  /** set up data and display for stand-alone */
  void setupServer(DisplayImpl[] displays, DataReference[] refs)
       throws VisADException, RemoteException {
    // create RealTypes for the X and Y axes of the drawing space
    RealType x = new RealType("x");
    RealType y = new RealType("y");
    // create the RealTupleType for the drawing space
    RealTupleType xy = new RealTupleType(x, y);

    // construct Java3D display and mappings
    DisplayImpl display =
      new DisplayImplJ3D("display1", new TwoDDisplayRendererJ3D());

    // map the data drawing space to the display X and Y axes
    ScalarMap xmap = new ScalarMap(x, Display.XAxis);
    ScalarMap ymap = new ScalarMap(y, Display.YAxis);
    display.addMap(xmap);
    display.addMap(ymap);
    // set the details of the linear mappings from data to display axes
    xmap.setRange(-1.0, 1.0);
    ymap.setRange(-1.0, 1.0);

    // make point large enough to see easily
    GraphicsModeControl mode = display.getGraphicsModeControl();
    mode.setPointSize(5.0f);

    // turn off bounding box
    display.getDisplayRenderer().setBoxOn(false);

    // construct starter point as RealTuple
    RealTuple point = new RealTuple(xy, new double[] {0.0, 0.0});

    // link starter point to display
    //
    // note DirectManipulationRendererJ3D provides
    //   the point-drag behavior
    DataReferenceImpl ref = new DataReferenceImpl("point");
    ref.setData(point);
    DirectManipulationRendererJ3D dmrenderer =
      new DirectManipulationRendererJ3D();
    display.addReferences(dmrenderer, ref);

    // plug data and display in arrays
    displays[0] = display;
    refs[0] = ref;
  }

  /** set up the user interface */
  static void setupUI(DisplayImpl[] displays, DataReference[] refs)
       throws VisADException, RemoteException {
    // create JFrame (i.e., a window) for display and slider
    JFrame frame = new JFrame("PointDrag");
    frame.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {System.exit(0);}
    });

    // create JPanel in JFrame
    JPanel panel = new JPanel();
    panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
    panel.setAlignmentY(JPanel.TOP_ALIGNMENT);
    panel.setAlignmentX(JPanel.LEFT_ALIGNMENT);
    frame.getContentPane().add(panel);

    // add display to JPanel
    panel.add(displays[0].getComponent());

    // set size of JFrame and make it visible
    frame.setSize(500, 500);
    frame.setVisible(true);
  }

}