Ejemplo n.º 1
0
  /**
   * Connects the figure to the new connectableConnector. If there is no new connectableConnector
   * the connection reverts to its original one.
   */
  public void trackEnd(Point anchor, Point lead, int modifiersEx) {
    ConnectionFigure f = getOwner();
    // Change node type
    if ((modifiersEx
                & (InputEvent.META_DOWN_MASK
                    | InputEvent.CTRL_DOWN_MASK
                    | InputEvent.ALT_DOWN_MASK
                    | InputEvent.SHIFT_DOWN_MASK))
            != 0
        && (modifiersEx & InputEvent.BUTTON2_DOWN_MASK) == 0) {
      f.willChange();
      int index = getBezierNodeIndex();
      BezierPath.Node v = f.getNode(index);
      if (index > 0 && index < f.getNodeCount()) {
        v.mask = (v.mask + 3) % 4;
      } else if (index == 0) {
        v.mask = ((v.mask & BezierPath.C2_MASK) == 0) ? BezierPath.C2_MASK : 0;
      } else {
        v.mask = ((v.mask & BezierPath.C1_MASK) == 0) ? BezierPath.C1_MASK : 0;
      }
      f.setNode(index, v);
      f.changed();
      fireHandleRequestSecondaryHandles();
    }

    Point2D.Double p = view.viewToDrawing(lead);
    view.getConstrainer().constrainPoint(p);
    Connector target = findConnectionTarget(p, view.getDrawing());
    if (target == null) {
      target = savedTarget;
    }

    setLocation(p);
    if (target != savedTarget) {
      disconnect();
      connect(target);
    }
    getOwner().setLiner(savedLiner);
    getOwner().updateConnection();
    connectableConnector = null;
    connectors = Collections.emptyList();
  }
Ejemplo n.º 2
0
/**
 * AbstractConnectionHandle factors the common code for handles that can be used to change the
 * connection of a ConnectionFigure.
 *
 * <p>XXX - Undo/Redo is not implemented yet.
 *
 * @author Werner Randelshofer
 * @version 3.0 2007-05-18 Changed due to changes in the canConnect methods of the ConnectionFigure
 *     interface. Shortened the name from AbstractChangeConnectionHandle to
 *     AbstractConnectionHandle. <br>
 *     2.1 2006-02-16 Remove savedLiner from connection while tracking. <br>
 *     2.0 2006-01-14 Changed to support double coordinates. <br>
 *     1.0 2003-12-01 Derived from JHotDraw 5.4b1.
 */
public abstract class AbstractConnectionHandle extends AbstractHandle {
  private Connector savedTarget;
  private Connector connectableConnector;
  private Figure connectableFigure;
  private Point start;
  /**
   * We temporarily remove the Liner from the connection figure, while the handle is being moved. We
   * store the Liner here, and add it back when the user has finished the interaction.
   */
  private Liner savedLiner;
  /** All connectors of the connectable Figure. */
  protected Collection<Connector> connectors = Collections.emptyList();

  /** Initializes the change connection handle. */
  protected AbstractConnectionHandle(ConnectionFigure owner) {
    super(owner);
  }

  public ConnectionFigure getOwner() {
    return (ConnectionFigure) super.getOwner();
  }

  public boolean isCombinableWith(Handle handle) {
    return false;
  }
  /** Returns the connector of the change. */
  protected abstract Connector getTarget();

  /** Disconnects the connection. */
  protected abstract void disconnect();

  /** Connect the connection with the given figure. */
  protected abstract void connect(Connector c);

  /** Sets the location of the connectableConnector point. */
  protected abstract void setLocation(Point2D.Double p);
  /** Returns the start point of the connection. */
  protected abstract Point2D.Double getLocation();

  /** Gets the side of the connection that is unaffected by the change. */
  protected Connector getSource() {
    if (getTarget() == getOwner().getStartConnector()) {
      return getOwner().getEndConnector();
    }
    return getOwner().getStartConnector();
  }

  /** Disconnects the connection. */
  public void trackStart(Point anchor, int modifiersEx) {
    savedTarget = getTarget();
    start = anchor;
    savedLiner = getOwner().getLiner();
    getOwner().setLiner(null);
    // disconnect();
    fireHandleRequestSecondaryHandles();
  }

  /** Finds a new connectableConnector of the connection. */
  public void trackStep(Point anchor, Point lead, int modifiersEx) {
    Point2D.Double p = view.viewToDrawing(lead);
    view.getConstrainer().constrainPoint(p);
    connectableFigure = findConnectableFigure(p, view.getDrawing());
    if (connectableFigure != null) {
      Connector aTarget = findConnectionTarget(p, view.getDrawing());
      if (aTarget != null) {
        p = aTarget.getAnchor();
      }
    }
    getOwner().willChange();
    setLocation(p);
    getOwner().changed();
    repaintConnectors();
  }

  /**
   * Connects the figure to the new connectableConnector. If there is no new connectableConnector
   * the connection reverts to its original one.
   */
  public void trackEnd(Point anchor, Point lead, int modifiersEx) {
    ConnectionFigure f = getOwner();
    // Change node type
    if ((modifiersEx
                & (InputEvent.META_DOWN_MASK
                    | InputEvent.CTRL_DOWN_MASK
                    | InputEvent.ALT_DOWN_MASK
                    | InputEvent.SHIFT_DOWN_MASK))
            != 0
        && (modifiersEx & InputEvent.BUTTON2_DOWN_MASK) == 0) {
      f.willChange();
      int index = getBezierNodeIndex();
      BezierPath.Node v = f.getNode(index);
      if (index > 0 && index < f.getNodeCount()) {
        v.mask = (v.mask + 3) % 4;
      } else if (index == 0) {
        v.mask = ((v.mask & BezierPath.C2_MASK) == 0) ? BezierPath.C2_MASK : 0;
      } else {
        v.mask = ((v.mask & BezierPath.C1_MASK) == 0) ? BezierPath.C1_MASK : 0;
      }
      f.setNode(index, v);
      f.changed();
      fireHandleRequestSecondaryHandles();
    }

    Point2D.Double p = view.viewToDrawing(lead);
    view.getConstrainer().constrainPoint(p);
    Connector target = findConnectionTarget(p, view.getDrawing());
    if (target == null) {
      target = savedTarget;
    }

    setLocation(p);
    if (target != savedTarget) {
      disconnect();
      connect(target);
    }
    getOwner().setLiner(savedLiner);
    getOwner().updateConnection();
    connectableConnector = null;
    connectors = Collections.emptyList();
  }

  private Connector findConnectionTarget(Point2D.Double p, Drawing drawing) {
    Figure targetFigure = findConnectableFigure(p, drawing);

    if (getSource() == null && targetFigure != null) {
      return findConnector(p, targetFigure, getOwner());
    } else if (targetFigure != null) {
      Connector target = findConnector(p, targetFigure, getOwner());
      if ((targetFigure != null)
          && targetFigure.canConnect()
          && targetFigure != savedTarget
          && !targetFigure.includes(getOwner())
          && (canConnect(getSource(), target)
              || getTarget() != null && getTarget().getOwner() == targetFigure)) {
        return target;
      }
    }
    return null;
  }

  protected abstract boolean canConnect(Connector existingEnd, Connector targetEnd);

  protected Connector findConnector(Point2D.Double p, Figure f, ConnectionFigure prototype) {
    return f.findConnector(p, prototype);
  }

  /** Draws this handle. */
  public void draw(Graphics2D g) {
    Graphics2D gg = (Graphics2D) g.create();
    gg.transform(view.getDrawingToViewTransform());
    for (Connector c : connectors) {
      c.draw(gg);
    }

    gg.dispose();
    drawCircle(g, (getTarget() == null) ? Color.red : Color.green, Color.black);
  }

  private Figure findConnectableFigure(Point2D.Double p, Drawing drawing) {
    for (Figure f : drawing.getFiguresFrontToBack()) {
      if (!f.includes(getOwner()) && f.canConnect() && f.contains(p)) {
        return f;
      }
    }
    return null;
  }

  protected void setPotentialTarget(Connector newTarget) {
    this.connectableConnector = newTarget;
  }

  protected Rectangle basicGetBounds() {
    // if (connection.getPointCount() == 0) return new Rectangle(0, 0, getHandlesize(),
    // getHandlesize());
    Point center = view.drawingToView(getLocation());
    return new Rectangle(
        center.x - getHandlesize() / 2,
        center.y - getHandlesize() / 2,
        getHandlesize(),
        getHandlesize());
  }

  protected BezierFigure getBezierFigure() {
    return (BezierFigure) getOwner();
  }

  protected abstract int getBezierNodeIndex();

  @Override
  public final Collection<Handle> createSecondaryHandles() {
    LinkedList<Handle> list = new LinkedList<Handle>();
    if (((ConnectionFigure) getOwner()).getLiner() == null && savedLiner == null) {
      int index = getBezierNodeIndex();
      BezierFigure f = getBezierFigure();
      BezierPath.Node v = f.getNode(index);
      if ((v.mask & BezierPath.C1_MASK) != 0 && (index != 0 || f.isClosed())) {
        list.add(new BezierControlPointHandle(f, index, 1));
      }
      if ((v.mask & BezierPath.C2_MASK) != 0 && (index < f.getNodeCount() - 1 || f.isClosed())) {
        list.add(new BezierControlPointHandle(f, index, 2));
      }
      if (index > 0 || f.isClosed()) {
        int i = (index == 0) ? f.getNodeCount() - 1 : index - 1;
        v = f.getNode(i);
        if ((v.mask & BezierPath.C2_MASK) != 0) {
          list.add(new BezierControlPointHandle(f, i, 2));
        }
      }
      if (index < f.getNodeCount() - 2 || f.isClosed()) {
        int i = (index == f.getNodeCount() - 1) ? 0 : index + 1;
        v = f.getNode(i);
        if ((v.mask & BezierPath.C1_MASK) != 0) {
          list.add(new BezierControlPointHandle(f, i, 1));
        }
      }
    }
    return list;
  }

  protected BezierPath.Node getBezierNode() {
    int index = getBezierNodeIndex();
    return getBezierFigure().getNodeCount() > index ? getBezierFigure().getNode(index) : null;
  }

  public String getToolTipText(Point p) {
    ConnectionFigure f = (ConnectionFigure) getOwner();
    if (f.getLiner() == null && savedLiner == null) {
      ResourceBundleUtil labels = ResourceBundleUtil.getLAFBundle("org.jhotdraw.draw.Labels");
      BezierPath.Node node = getBezierNode();
      return (node == null)
          ? null
          : labels.getFormatted(
              "bezierNodeHandle.tip",
              labels.getFormatted(
                  (node.getMask() == 0)
                      ? "bezierNode.linearNode"
                      : ((node.getMask() == BezierPath.C1C2_MASK)
                          ? "bezierNode.cubicNode"
                          : "bezierNode.quadraticNode")));
    } else {
      return null;
    }
  }
  /**
   * Updates the list of connectors that we draw when the user moves or drags the mouse over a
   * figure to which can connect.
   */
  public void repaintConnectors() {
    Rectangle2D.Double invalidArea = null;
    for (Connector c : connectors) {
      if (invalidArea == null) {
        invalidArea = c.getDrawingArea();
      } else {
        invalidArea.add(c.getDrawingArea());
      }
    }
    connectors =
        (connectableFigure == null)
            ? new java.util.LinkedList<Connector>()
            : connectableFigure.getConnectors(getOwner());
    for (Connector c : connectors) {
      if (invalidArea == null) {
        invalidArea = c.getDrawingArea();
      } else {
        invalidArea.add(c.getDrawingArea());
      }
    }
    if (invalidArea != null) {
      view.getComponent().repaint(view.drawingToView(invalidArea));
    }
  }
}