I suppose, I missed the concept behind setting anchors on XSLF group shapes:
First I noticed, that when I use grouping to create a PPTX slide show, the PPTX
looks empty in MS
Powerpoint 2007 in contrast to Libre Office where it looks fine. After some
investigation, I found
that the PPTX looks fine in MS Powerpoint, when I set an arbitrary anchor on
the XSLFGroupShape,
e.g. [0,0,1,1]. But now the PPTX seems empty in Libre-Office. After some more
investigation I came
out with setting an arbitrary anchor AND an interior anchor on the group shape
lets the PPTX look
fine in MS Powerpoint 2007 AND Libre Office.
Now my questions:
1) Shouldn't a PPTX created by the XSLF high-level API (only), look the same in
MS Powerpoint 2007
and Libre Office?
2) Shouldn't the anchors of a group computed implicitely from the anchors of
their children?
3) What do I miss, how to use group anchors correctly?
I have attached a small self-contained test class which describes the behaviour
from above in for
cases:
1) Test cases 1 and 4 (with no anchor at all or with both the anchor and the
interior anchor set)
look fine in Libre Office while test cases 2 and 3 (with either the anchor or
the interior anchor
set) do not.
2) Test cases 2 and 4 (with at least the anchor set) look fine in MS Powerpoint
2007 while test
cases 1 and 3 (without the regular anchor set) do not.
Fortunately test case 4 looks fine in MS Powerpoint as well as Libre Office,
but I would prefer to
understand, why, instead of ending up with the outcome of trial and error.
Thanks in advance for any comment on this,
Frank-Michael
import java.awt.Rectangle;
import java.awt.geom.Rectangle2D;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.poi.xslf.usermodel.TextAutofit;
import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.apache.poi.xslf.usermodel.XSLFGroupShape;
import org.apache.poi.xslf.usermodel.XSLFShapeContainer;
import org.apache.poi.xslf.usermodel.XSLFSlide;
import org.apache.poi.xslf.usermodel.XSLFTextBox;
public class XSLFGroupingTester {
static XSLFTextBox createText(XSLFShapeContainer container, String
text, Rectangle2D r) {
XSLFTextBox box = container.createTextBox();
box.setAnchor(r);
box.setText(text);
box.setTextAutofit(TextAutofit.NORMAL);
return box;
}
static XMLSlideShow createSlideShow(boolean createAnchor, boolean
createInteriorAnchor) {
XMLSlideShow ppt = new XMLSlideShow();
XSLFSlide slide = ppt.createSlide();
XSLFGroupShape group = slide.createGroup();
if (createAnchor) {
group.setAnchor(new Rectangle(0, 0, 1, 1));
}
if (createInteriorAnchor) {
group.setInteriorAnchor(new Rectangle(0, 0, 1, 1));
}
createText(group, "A", new Rectangle(10, 11, 40, 50));
createText(group, "B", new Rectangle(100, 101, 75, 90));
return ppt;
}
public static void main(String[] args) throws IOException {
System.out.println(new File(".").getAbsolutePath());
createSlideShow(false, false).write(new
FileOutputStream("test1-no-anchor-no-interioranchor.pptx"));
createSlideShow(true, false).write(new
FileOutputStream("test2-with-anchor-no-interioranchor.pptx"));
createSlideShow(false, true).write(new
FileOutputStream("test3-no-anchor-with-interioranchor.pptx"));
createSlideShow(true, true).write(new
FileOutputStream("test4-with-anchor-with-interioranchor.pptx"));
}
}
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