XSLFGroupShape 不包含其子形状

我正在使用 Apache POI 3.16（撰写本文时的最新版本）。在下面的代码片段中，我创建了一个 XSLFGroupShape，然后用它来创建一堆子形状：

XSLFGroupShape group = slide.createGroup();

XSLFAutoShape cardRect = group.createAutoShape();
cardRect.setShapeType(ShapeType.RECT);
cardRect.setAnchor(rect);

XSLFPictureShape avatarShape = group.createPicture(avatar);

// More shapes added to the group here...

The problem is the following: in the generated PowerPoint file, the group position and dimensions appear to be uninitialized (I've selected the rectangle whose content is pixelated; the whole rectangle and its content is a single XSLFGroupShape; notice the group's manipulator at the top-left corner of the slide):

我的代码中是否遗漏了任何内容？有没有办法规避或解决这个问题？

The GroupShape需要一个Anchorand an InteriorAnchor。分组的形状必须适合GroupShape. The PowerPoint当用户与组一起工作时，GUI 会自动进行管理。但apache poi需要对此进行正确的设置，因为它只是将程序所说的内容写入文件。

示例：宽度为 350、高度为 300、左侧为 100、顶部为 50 的组形状以及每个角上的简单形状。

import java.io.FileOutputStream;

import org.apache.poi.xslf.usermodel.*;
import org.apache.poi.sl.usermodel.*;

import java.awt.Rectangle;
import java.awt.Color;

public class CreatePPTXGroupShape {

 public static void main(String[] args) throws Exception {

  SlideShow slideShow = new XMLSlideShow();

  Slide slide = slideShow.createSlide();

  int groupLeft = 100;
  int groupTop = 50;
  int groupWidth = 350;
  int groupHeight = 300;
  int groupPadding= 10;

  GroupShape group = slide.createGroup();
  group.setInteriorAnchor(new Rectangle(groupLeft, groupTop, groupWidth, groupHeight));
  group.setAnchor(new Rectangle(groupLeft+groupPadding, groupTop+groupPadding, groupWidth-groupPadding, groupHeight-groupPadding));

  AutoShape shape = group.createAutoShape();
  shape.setShapeType(ShapeType.RECT);
  shape.setFillColor(Color.GREEN);
  shape.setAnchor(new Rectangle(groupLeft, groupTop, 150, 100));

  shape = group.createAutoShape();
  shape.setShapeType(ShapeType.TRIANGLE);
  shape.setFillColor(Color.RED);
  shape.setAnchor(new Rectangle(groupLeft+groupWidth-120, groupTop, 120, 100));

  shape = group.createAutoShape();
  shape.setShapeType(ShapeType.DONUT);
  shape.setFillColor(Color.YELLOW);
  shape.setAnchor(new Rectangle(groupLeft, groupTop+groupHeight-90, 90, 90));

  shape = group.createAutoShape();
  shape.setShapeType(ShapeType.ELLIPSE);
  shape.setFillColor(Color.BLUE);
  shape.setAnchor(new Rectangle(groupLeft+groupWidth-100, groupTop+groupHeight-100, 100, 100));

  FileOutputStream out = new FileOutputStream("CreatePPTXGroupShape.pptx");
  slideShow.write(out);
  out.close();
 }
}