>>>>> "AP" == Andrew Pietsch <[EMAIL PROTECTED]> writes:
AP> I've now decided I need this.. )c:
AP> I'm presuming the final implementation is still someway off, so is
AP> there any change of adding it (since you feel its easy) or
AP> pointing me in the right direction so I can implement it?
I'll gadly point you in the right direction ;)
All of text wrapping is done as a post-processing step in text
layout. That post-processing step has two parts, first it figures out
what needs to be on each line, then it positions all the glyphs.
All this work is done in the two methods:
// Does the line break determination
batik.gvt.text.GlyphLayout.textWrapTextChunk(....)
// Does the glyph positioning
batik.gvt.text.GlyphLayout.layoutChunk(....)
As textWrapTextChunk does it's work it adde LineInfo object to a
list, one for each line of text.
What I would suggest is adding a vertical-align offset member to
the LineInfo class. This should be a Point2D.float. Use the same
Point2D.float for all lines in a single flowRect (the list of
flowRects is accessed from the 'flowRectsIter'). When we hit the end
of a flowRect (or of text), you can get the vertical size from 'dy'
(depending on the case you will need to figure in the current line's
size - search for 'bottomEdge') & the flow rect size from cRect.height
from this you can calculate the 'left over' space and put half of it
in the vertical-align Point2D's y value.
Then in the layoutChunk method just add the vertical-align offset
in when calculating the correct lineLoc for the current line.
---
You will also need to pass this information to the text-wrap stuff
from the source SVG. This is mostly done in the
batik.extension.svg.SVGFlowTextElementBridge class. You might look at
how the margin's are done (search for makeMarginInfo) or how the
FlowRegions are handleded (search for getRegions).
---
Hope this helps, and good luck (if you get into it and have
specific questions feel free to post).
AP> Thanks Andrew
AP> On Wed, 2002-10-23 at 22:34, Thomas E Deweese wrote:
>> >>>>> "AP" == Andrew Pietsch <[EMAIL PROTECTED]> writes:
>>
AP> Hi,I was wondering if the css vertical-align property is supported
AP> (or planned) when using the flow text extension (i've tried a few
AP> times and browsed the code so I'm guessing no).
>> No, and eventually :)
>>
>> This is on hold pending decisions in the SVG WG. The
>> implementation was done to get experience to feed back to the SVG
>> WG. The WG is tring to sort out the details of how text wrapping
>> will work - what features to support, what algs should be used,
>> etc.
>>
AP> I'm using the cvs version (week or so old). I have a single flow
AP> region and it would be nice (though not critical) to vertically
AP> centre the text.
>> This wouldn't be hard to implement for this case (or actually even
>> for multiple flow regions), but I haven't bothered since everything
>> is about to change anyway.
>>
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