//
// DirectManipulationRendererJ2D.java
//

/*
VisAD system for interactive analysis and visualization of numerical
data.  Copyright (C) 1996 - 2017 Bill Hibbard, Curtis Rueden, Tom
Rink, Dave Glowacki, Steve Emmerson, Tom Whittaker, Don Murray, and
Tommy Jasmin.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA
*/

package visad.java2d;

import visad.*;

import java.rmi.*;


/**
   DirectManipulationRendererJ2D is the VisAD class for direct
   manipulation rendering under Java2D.


   This DataRenderer supports direct manipulation for Real, RealTuple
   and Field Data objects (Field data objects must have RealType or
   RealTupleType ranges and Gridded1DSet domain Sets); no RealType may
   be mapped to multiple spatial DisplayRealTypes; the RealType of a
   Real object must be mapped to XAxis, YAxis or YAxis; at least one
   of the RealType components of a RealTuple object must be mapped to
   XAxis, YAxis or YAxis; the domain RealType and at least one RealType
   range component of a Field object must be mapped to XAxis or YAxis
*/
public class DirectManipulationRendererJ2D extends RendererJ2D {

  VisADGroup branch = null;
  VisADGroup extra_branch = null;

  /** this DataRenderer supports direct manipulation for Real,
      RealTuple and Field Data objects (Field data objects must
      have RealType or RealTupleType ranges and Gridded1DSet
      domain Sets); no RealType may be mapped to multiple spatial
      DisplayRealTypes; the RealType of a Real object must be
      mapped to XAxis, YAxis or YAxis; at least one of the
      RealType components of a RealTuple object must be mapped
      to XAxis, YAxis or YAxis; the domain RealType and at
      least one RealType range component of a Field object
      must be mapped to XAxis, YAxis or YAxis */
  public DirectManipulationRendererJ2D () {
    super();
  }

  public void setLinks(DataDisplayLink[] links, DisplayImpl d)
       throws VisADException {
    if (links == null || links.length != 1) {
      throw new DisplayException("DirectManipulationRendererJ2D.setLinks: " +
                                 "must be exactly one DataDisplayLink");
    }
    super.setLinks(links, d);
  }

  public void checkDirect() throws VisADException, RemoteException {
    realCheckDirect();
  }

  public void addPoint(float[] x) throws VisADException {
    int count = x.length / 3;
    VisADGeometryArray array = null;
    if (count == 1) {
      array = new VisADPointArray();
    }
    else if (count == 2) {
      array = new VisADLineArray();
    }
    else {
      return;
    }
    array.coordinates = x;
    array.vertexCount = count;
    VisADAppearance appearance = new VisADAppearance();

    DataDisplayLink[] Links = getLinks();
    if (Links == null || Links.length == 0) {
      return;
    }
    DataDisplayLink link = Links[0];

    float[] default_values = link.getDefaultValues();
    DisplayImpl display = getDisplay();
    appearance.pointSize =
      default_values[display.getDisplayScalarIndex(Display.PointSize)];
    appearance.lineWidth =
      default_values[display.getDisplayScalarIndex(Display.LineWidth)];
    appearance.lineStyle = (int)
      default_values[display.getDisplayScalarIndex(Display.LineStyle)];
/* WLH 21 Aug 98
    GraphicsModeControl mode = getDisplay().getGraphicsModeControl();
    appearance.pointSize = mode.getPointSize();
    appearance.lineWidth = mode.getLineWidth();
    appearance.lineStyle = mode.getLineStyle();
*/
    appearance.red = 1.0f;
    appearance.green = 1.0f;
    appearance.blue = 1.0f;
    appearance.array = array;
    extra_branch.addChild(appearance);
  }

  public VisADGroup getExtraBranch() {
    return extra_branch;
  }

  /** create a VisADGroup scene graph for Data in links[0] */
  public synchronized VisADGroup doTransform()
         throws VisADException, RemoteException {
    branch = new VisADGroup();
    extra_branch = new VisADGroup();

    DataDisplayLink[] Links = getLinks();
    if (Links == null || Links.length == 0) {
      return null;
    }
    DataDisplayLink link = Links[0];

    // values needed by drag_direct, which cannot throw Exceptions
    ShadowTypeJ2D shadow = (ShadowTypeJ2D) link.getShadow();

    // check type and maps for valid direct manipulation
    if (!getIsDirectManipulation()) {
      throw new BadDirectManipulationException(getWhyNotDirect() +
        ": DirectManipulationRendererJ2D.doTransform");
    }

    // initialize valueArray to missing
    int valueArrayLength = getDisplay().getValueArrayLength();
    float[] valueArray = new float[valueArrayLength];
    for (int i=0; i