The leading and trailing space is requested per renderer. This is because some glyphs (e.g. numbers) are scale-invarient and will be clipped off if the rendering is clipped exactly. I think the container of the sequence renderers loops over these and finds the maximum one. Then, it individualy translates each sequence renderer so that their sequence-based co-ordinates line up, but they are guaranteed a minimum of leader and trailer padding. Does that help?
M David Huen wrote: > I've been going thru' the SequencePanel code to document it a bit more and > I am puzzled over the intent behind the leader and trailer allocations in > this code. > > If I understand the SequencePanel source correctly, each renderer tells > SequencePanel thru' getMinimumLeader and getMinimumTrailer the number of > pixels to set aside for these. SequencePanel uses these on a per-renderer > basis to append the number of pixels before and after the space required > to render the sequence and aligns the left edge against the right edge of > the leading Border allocation. > > If this is the case, the moment we start allocating leaders and trailers > (all renderers use sero so far), we might have sequence renderings out of > kilter, wouldn't we? Shouldn't the allocation be per-panel rather > per-renderer? If we use per-panel allocations, the renderers will need to > recover from SequencePanel the actual leader/trailer allocations. Have I > understood the code correctly? > > What was the original intent for these allocations? Labels? > > Thanks, > David Huen > > _______________________________________________ > Biojava-l mailing list - [EMAIL PROTECTED] > http://biojava.org/mailman/listinfo/biojava-l > > _______________________________________________ Biojava-l mailing list - [EMAIL PROTECTED] http://biojava.org/mailman/listinfo/biojava-l
