https://bugs.documentfoundation.org/show_bug.cgi?id=157215
Bug ID: 157215
Summary: FILEOPEN PPTX: glue point escape directions are
ignored for object specific glue points
Product: LibreOffice
Version: 24.2.0.0 alpha0+ Master
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: enhancement
Priority: medium
Component: Impress
Assignee: libreoffice-bugs@lists.freedesktop.org
Reporter: rb.hensc...@t-online.de
Created attachment 189531
--> https://bugs.documentfoundation.org/attachment.cgi?id=189531&action=edit
gluepoints with escape directions
The attached file contains the shape "flowChartConnector". It defines leaving
directions for its glue points. I have used the custGeom from the preset
definition to be sure, that the error is not in the import of preset shapes.
A glue point in OOXML is defined in a <cxn> element. It has an "ang" attribute
for the leaving direction and a "pos" element for the location of the glue
point. These are read in ConnectionSiteContext. But when the read values are
transferred to properties only "pos" is evaluated and "ang" is ignored. That
happens in CustomShapeProperties::pushToPropSet().
I see no reason to ignore the "ang" attribute. We have the property
css.drawing.EscapeDirection. That cannot hold arbitrary angles, but the actual
angles used in the OOXML preset shapes can be represented by LEFT, UP, RIGHT
and DOWN. ODF has the attribute draw:glue-point-leaving-directions for this.
We have already glue point leaving directions for user-defined glue points. So
implementing a correct rendering should not be too hard.
The result of ignoring the "ang" attribute is, that the drawings in PowerPoint
and LibreOffice look different when connectors together with such shapes are
used.
You can see the escape directions in PowerPoint when you use the "elbow" or
"curved" connector there. In LibreOffice those are the "Standard" and "Curved"
connectors.
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