How to use

getView

method

in

org.jhotdraw.draw.tool.BezierTool

@Override
public void mouseDragged(MouseEvent evt) {
  if (finishWhenMouseReleased == null) {
    finishWhenMouseReleased = Boolean.TRUE;
  }
  int x = evt.getX();
  int y = evt.getY();
  addPointToFigure(getView().viewToDrawing(new Point(x, y)));
}

@Override
public void activate(DrawingEditor editor) {
  super.activate(editor);
  getView().setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
}

@Override
public void draw(Graphics2D g) {
  if (createdFigure != null && //
      anchor != null && //
      mouseLocation != null &&//
      getView() == creationView) {
    g.setColor(Color.BLACK);
    g.setStroke(new BasicStroke(1f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0f, new float[]{1f, 5f}, 0f));
    g.drawLine(anchor.x, anchor.y, mouseLocation.x, mouseLocation.y);
    if (!isWorking && createdFigure.isClosed() && createdFigure.getNodeCount() > 1) {
      Point p = creationView.drawingToView(createdFigure.getStartPoint());
      g.drawLine(mouseLocation.x, mouseLocation.y, p.x, p.y);
    }
  }
}

protected BezierPath calculateFittedCurve(BezierPath path) {
  return Bezier.fitBezierPath(path, 1.5d / getView().getScaleFactor());
}

@Override
public void mouseClicked(MouseEvent evt) {
  if (createdFigure != null) {
    switch (evt.getClickCount()) {
      case 1:
        if (createdFigure.getNodeCount() > 2) {
          Rectangle r = new Rectangle(getView().drawingToView(createdFigure.getStartPoint()));
          r.grow(2, 2);
          if (r.contains(evt.getX(), evt.getY())) {
            createdFigure.setClosed(true);
            finishCreation(createdFigure, creationView);
            createdFigure = null;
            if (isToolDoneAfterCreation) {
              fireToolDone();
            }
          }
        }
        break;
      case 2:
        finishWhenMouseReleased = null;
        finishCreation(createdFigure, creationView);
        createdFigure = null;
        break;
    }
  }
}

@Override
public void deactivate(DrawingEditor editor) {
  super.deactivate(editor);
  getView().setCursor(Cursor.getDefaultCursor());
  if (createdFigure != null) {
    if (anchor != null && mouseLocation != null) {
      Rectangle r = new Rectangle(anchor);
      r.add(mouseLocation);
      if (createdFigure.getNodeCount() > 0 && createdFigure.isClosed()) {
        r.add(getView().drawingToView(createdFigure.getStartPoint()));
      }
      fireAreaInvalidated(r);
    }
    finishCreation(createdFigure, creationView);
    createdFigure = null;
  }
}

if (createdFigure != null && creationView != getView()) {
  finishCreation(createdFigure, creationView);
  createdFigure = null;
  creationView = getView();
  creationView.clearSelection();
  finishWhenMouseReleased = null;

protected void addPointToFigure(Point2D.Double newPoint) {
  int pointCount = createdFigure.getNodeCount();
  createdFigure.willChange();
  if (pointCount < 2) {
    createdFigure.addNode(new BezierPath.Node(newPoint));
  } else {
    Point2D.Double endPoint = createdFigure.getEndPoint();
    Point2D.Double secondLastPoint = (pointCount <= 1) ? endPoint : createdFigure.getPoint(pointCount - 2, 0);
    if (newPoint.equals(endPoint)) {
      // nothing to do
    } else if (pointCount > 1 && Geom.lineContainsPoint(newPoint.x, newPoint.y, secondLastPoint.x, secondLastPoint.y, endPoint.x, endPoint.y, 0.9f / getView().getScaleFactor())) {
      createdFigure.setPoint(pointCount - 1, 0, newPoint);
    } else {
      createdFigure.addNode(new BezierPath.Node(newPoint));
    }
  }
  createdFigure.changed();
}