/**
   * Sets the anchor (the bounding box rectangle) of this shape. All coordinates should be expressed
   * in Master units (576 dpi).
   *
   * @param anchor new anchor
   */
  public void setAnchor(java.awt.Rectangle anchor) {

    EscherContainerRecord spContainer =
        (EscherContainerRecord) _escherContainer.getChildRecords().get(0);

    EscherClientAnchorRecord clientAnchor =
        (EscherClientAnchorRecord) getEscherChild(spContainer, EscherClientAnchorRecord.RECORD_ID);
    // hack. internal variable EscherClientAnchorRecord.shortRecord can be
    // initialized only in fillFields(). We need to set shortRecord=false;
    byte[] header = new byte[16];
    LittleEndian.putUShort(header, 0, 0);
    LittleEndian.putUShort(header, 2, 0);
    LittleEndian.putInt(header, 4, 8);
    clientAnchor.fillFields(header, 0, null);

    clientAnchor.setFlag((short) (anchor.y * MASTER_DPI / POINT_DPI));
    clientAnchor.setCol1((short) (anchor.x * MASTER_DPI / POINT_DPI));
    clientAnchor.setDx1((short) ((anchor.width + anchor.x) * MASTER_DPI / POINT_DPI));
    clientAnchor.setRow1((short) ((anchor.height + anchor.y) * MASTER_DPI / POINT_DPI));

    EscherSpgrRecord spgr =
        (EscherSpgrRecord) getEscherChild(spContainer, EscherSpgrRecord.RECORD_ID);

    spgr.setRectX1(anchor.x * MASTER_DPI / POINT_DPI);
    spgr.setRectY1(anchor.y * MASTER_DPI / POINT_DPI);
    spgr.setRectX2((anchor.x + anchor.width) * MASTER_DPI / POINT_DPI);
    spgr.setRectY2((anchor.y + anchor.height) * MASTER_DPI / POINT_DPI);
  }
  /**
   * Sets the coordinate space of this group. All children are constrained to these coordinates.
   *
   * @param anchor the coordinate space of this group
   */
  public void setCoordinates(Rectangle2D anchor) {
    EscherContainerRecord spContainer =
        (EscherContainerRecord) _escherContainer.getChildRecords().get(0);
    EscherSpgrRecord spgr =
        (EscherSpgrRecord) getEscherChild(spContainer, EscherSpgrRecord.RECORD_ID);

    int x1 = (int) Math.round(anchor.getX() * MASTER_DPI / POINT_DPI);
    int y1 = (int) Math.round(anchor.getY() * MASTER_DPI / POINT_DPI);
    int x2 = (int) Math.round((anchor.getX() + anchor.getWidth()) * MASTER_DPI / POINT_DPI);
    int y2 = (int) Math.round((anchor.getY() + anchor.getHeight()) * MASTER_DPI / POINT_DPI);

    spgr.setRectX1(x1);
    spgr.setRectY1(y1);
    spgr.setRectX2(x2);
    spgr.setRectY2(y2);
  }