Class Element

src/org/opensourcephysics/display3d/simple3d/Element.java:35–992

Title: Element Interaction: An Element includes the following targets: TARGET_POSITION : Allows the element to be repositioned TARGET_SIZE : Allows the element to be resized The actual position (and implementation) of the target depends on the element. Cop

 * @version June 2005
 */
public abstract class Element implements org.opensourcephysics.display3d.core.Element {
  static final int SENSIBILITY = 5;                     // The accuracy for the mouse to find a point on the screen
  // Configuration variables
  private boolean visible = true;                       // is the object visible?
  private double x = 0.0, y = 0.0, z = 0.0;             // position of the element
  private double sizeX = 1.0, sizeY = 1.0, sizeZ = 1.0; // the size of the element in each dimension
  private String name = "";                             //$NON-NLS-1$
  private Transformation transformation = null;
  private Style style = new Style(this);
  private Group group = null;
  private double factorX = 1.0;
  private double factorY = 1.0;
  private double factorZ = 1.0;
  // Implementation variables
  private boolean elementChanged = true, needsToProject = true;
  private DrawingPanel3D panel;
  // Variables for interaction
  private ArrayList<InteractionListener> listeners = new ArrayList<InteractionListener>();
  protected final InteractionTarget targetPosition = new InteractionTarget(this, TARGET_POSITION);
  protected final InteractionTarget targetSize = new InteractionTarget(this, TARGET_SIZE);

  /**
   * Returns the DrawingPanel3D in which it (or its final ancestor group)
   * is displayed.
   * @return DrawingPanel3D
   */
  @Override
final public DrawingPanel3D getDrawingPanel3D() {
    Element el = this;
    while(el.group!=null) {
      el = el.group;
    }
    return el.panel;
  }

  /**
   * To be used internally by DrawingPanel3D only! Sets the panel for this element.
   * @param _panel DrawingPanel3D
   */
  void setPanel(DrawingPanel3D _panel) {
    this.panel = _panel;
    this.factorX = _panel.getScaleFactorX();
    this.factorY = _panel.getScaleFactorY();
    this.factorZ = _panel.getScaleFactorZ();
    elementChanged = true;
  }

  /**
   * Returns the group to which the element belongs
   * @return Group Returns null if it doesn't belong to a group
   */
  final Group getGroup() {
    return group;
  }

  /**
   * Returns the top group to which the element belongs
   * @return Group Returns null if it doesn't belong to a group