Generally speaking, your rebuilt ppt will always be lossy. You have to rebuilt the master sheet too but for now masters
are read-only - HSLF can read from master sheets but can't modify them.
There are three important pieces of data to preserve:
(a) Anchor - defines position of a shape in the slide:
Rectangle2D anchor = shape.getAnchor2D();
(b) Text properties, the ones returned by RichTextRun getters.
(c) basic shape properties, aka "Escher" properties.
The code below demonstrates how to copy Escher properties from one shape to
another :
Map<Integer, Integer> shapeProps = new HashMap();
org.apache.poi.hslf.model.Shape srcShape = ....; // source shape
EscherOptRecord opt = (EscherOptRecord)srcShape.getEscherChild(srcShape.getSpContainer(),
EscherOptRecord.RECORD_ID);
for (Iterator it = opt.getEscherProperties().iterator(); it.hasNext();
) {
Object p = it.next();
if(p instanceof EscherSimpleProperty){
EscherSimpleProperty sp = (EscherSimpleProperty)p;
int propId = sp.getId();
int propValue = sp.getPropertyValue();
shapeProps.put(propId, propValue);
} else {
//for simplicity skip complex and array properties
}
}
//rebuilding presentation
org.apache.poi.hslf.model.Shape tgtShape = ...; //target shape
for (Iterator<Integer> it = shapeProps.keySet().iterator();
it.hasNext(); ) {
int propId = it.next();
int propValue = shapeProps.get(propId);
tgtShape.setEscherProperty((short)propId, propValue);
}
Regards,
Yegor
Hi all,
i wrote a programm that iterates over all slides of a presentation and
saves all the data of its elements (raw text of TextBoxes/AutoShapes,
binary data of Pictures, etc) in some other place.
now i want to "rebuild" the presentation with those elements.
So my question is what fields/objects must i save that the rebuilded
presentation looks like the original one?
For now, im just talking about TextBoxes and AutoShapes, but i dont mind
any answer that helps with other Shape-objects too :)
When i save all the fields from my RichTextRun and Shape-objects i have
getter/setter-Methods for (eg. fontname/size, bold, italic... margin,
alignment...) it doesnt look the same.
if i write my original created SlideShow-object out to the filesystem,
it looks like the original presenation... So i think i just miss to save
some fields...
Maybe theres a way to marshal/unmarshal the objects needed to format the
presentation, so i dont have to handle with alot of fields...
Since i dont know alot about mastersheets and i read that POI dont know
much either, i dont know what can be handled through it...
greetings,
Felix
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