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Posted to dev@poi.apache.org by bu...@apache.org on 2012/02/03 12:23:43 UTC

DO NOT REPLY [Bug 52504] Can't insert picture on a XSSFWorkbook

https://issues.apache.org/bugzilla/show_bug.cgi?id=52504

Yegor Kozlov <ye...@dinom.ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX
         OS/Version|                            |All

--- Comment #1 from Yegor Kozlov <ye...@dinom.ru> 2012-02-03 11:23:43 UTC ---
The problem is that XSSF interprets dx and dy offsets differently than HSSF.  
In HSSF dx is a fraction of cell width in units of 1/1024. 
anchor.setDx1(400) sets the offset to approximately 40% of the cell width
(400/1024) and anchor.setDx2(655) sets the second dx offset to 65% of the cell.
that is, the image is located in the middle of the cell between 40% and 65% of
the width.

In XSSF all dx and dy offsets are set in EMUS (one pixel is 9525 EMUs) and the
equivalent code to anchor your image is as follows:

            anchor.setDx1(25*XSSFShape.EMU_PER_PIXEL);
            anchor.setDx2(41*XSSFShape.EMU_PER_PIXEL);
            anchor.setDy1(1*XSSFShape.EMU_PER_PIXEL);
            anchor.setDy2(14*XSSFShape.EMU_PER_PIXEL);

Setting dx and dy offsets is not portable between HSSF and XSSF. Change your
code to set them in pixels. If both .xls and .xlsx should be supported then add
a 'if' clause for each format:

        if(wb instanceof HSSFWorkbook){
            anchor.setDx1(400);
            anchor.setDx2(655);
            anchor.setDy1(10);
            anchor.setDy2(200);
        } else {
            anchor.setDx1(25*XSSFShape.EMU_PER_PIXEL);
            anchor.setDx2(41*XSSFShape.EMU_PER_PIXEL);
            anchor.setDy1(1*XSSFShape.EMU_PER_PIXEL);
            anchor.setDy2(14*XSSFShape.EMU_PER_PIXEL);
        }

Cheers,
Yegor

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