On Jun 1, 2012, at 9:36 AM, Bill Dudney wrote: > I'm able to add additional space around a paragraph in my subclass of > NSATSTypesetter's implementation of > willSetLineFragmentRect:forGlyphRange:usedRect:baselineOffset:. However, I am > not getting what I expect as I tweak the parameters to this method. I was > hoping for some insight on what these parameters really mean from the group > to help me understand why I'm not getting what I expect. > > When I increase the height of the lineFragmentRect and the usedRect the space > for the paragraph does grow and I get the space I expect. > > What is confusing me is where the line of text is drawn in the > lineFragmentRect. Based on experimentation the line of text is always drawn > near the top. When I first encountered this I assumed that tweaking the > baselineOffset would allow me control over where the text is drawn. I was > unable to change where the text is drawn by tweaking baselineOffset. > > My next attempt was to tweak the origin of the lineFragmentRect. That did > move the line of text, but not in ways I expected it to. My thinking was that > moving the origin.y 3 would move the text by 3. That does not appear to be > the case. > > Based my reading of the docs it looks to me as if the changes I make in > willSetLineFrag… are passed on to > setLineFragmentRect:forGlyphRange:usedRect:baselineOffset:. During the > implementation of setLineFrag… the layout manager must be called with > setLocation:forStartOfGlyphRange:
Bill, I had a similar problem, and I handled it by overriding -paragraphSpacingBeforeGlyphAtIndex: withProposedLineFragmentRect:. Ross _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
