Hello, I'd like to ask two questions which appeared on topic "Layer vs. overlay". Q1: What does \tightlayer[...] exactly do? (No item on wiki.) Q2: Why some layer properties are specified on \definelayer (beforetext: width=\overlaywidth,height=\overlayheight) and some during overlay setups (beforetext: preset=righttop)? - Related code given before: ---- \starttext \definelayer [beforetext][width=\overlaywidth,height=\overlayheight] \defineoverlay[beforetext][{\setups[beforetext]\tightlayer[beforetext]}] \startsetups[beforetext] \setlayer[beforetext][preset=righttop] {\framed[width=2in]{foo}} \stopsetups bar \stoptext ---- TIA. Best regards, Lukas -- Ing. Lukáš Procházka [mailto:LPr@pontex.cz] Pontex s. r. o. [mailto:pontex@pontex.cz] [http://www.pontex.cz] Bezová 1658 147 14 Praha 4 Tel: +420 244 062 238 Fax: +420 244 461 038
Hello Lukáš, I don't understand layers and overlays. This is what I could learn about \tightlayer from the source; I hope that reviving your question will help somebody else actually answer it. \tightlayer is defined in pack-lyr.mkiv. \unexpanded\def\tightlayer[#1]% {\hbox {\def\currentlayer{#1}% todo: left/right \setbox\nextbox\emptybox % hoogte/breedte are \wd\nextbox/\ht\nextbox \hsize\layerparameter\c!width % \overlaywidth = \hsize \vsize\layerparameter\c!height % \overlaywheight = \vsize \composedlayer{#1}}} The last command flushes the layer we are about to place: \composedlayer{x} is syntactic sugar for \flushlayer[x]. (Braces vs. brackets.) So it seems that what \tightlayer does is create a layer object exactly as large as its contents? What this is good for, and how it relates to overlays, I do not know. Good luck! --Sietse
participants (2)
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Procházka Lukáš Ing. - Pontex s. r. o. -
Sietse Brouwer