Difference between revisions of "Collectors"

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Notice that the size of the collected object grows as text is added.
 
Notice that the size of the collected object grows as text is added.
 
As a consequence, the positions of the corners get redefined as the bounding box grows.
 
As a consequence, the positions of the corners get redefined as the bounding box grows.
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{{todo|We need more documentation and examples for this complicated subject.}}
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[[Category:Graphics]] [[Category:Layers]]

Revision as of 09:51, 16 January 2009

< Layout | Columns | Overlays | Logos | Layers >

Collectors are an alternative to overlays that can be used to build-up composite objects. Layers, on the other hand, are used to define whole pages. See the details manual for further explanations.

Example

Adding labels to a figure.

\starttext                                                                             

\definecollector[example]
\setcollector [example] {\externalfigure[cow][width=4cm,frame=on]}
\setcollector [example] [corner={right,bottom},location={left,top}]
        {\framed{1}}
\setcollector [example] [corner={right,top},location={left,bottom}]
        {\framed{2}}
\setcollector [example] [corner={left,top},location={right,bottom}]
        {\framed{3}}
\setcollector [example] [corner={left,bottom},location={right,top}]
        {\framed{4}}

\startTEXpage
        \composedcollector{example}
\stopTEXpage

\stoptext

There is no confusion if the added text is placed within the first object. However,

\starttext                                                                             

\definecollector[example2]
\setcollector [example2] {\externalfigure[cow][width=4cm,frame=on]}
\setcollector [example2] [corner={right,bottom},location={right,bottom}]
        {\framed{1}}
\setcollector [example2] [corner={right,top},location={right,top}]
        {\framed{2}}
\setcollector [example2] [corner={left,top},location={left,top}]
        {\framed{3}}
\setcollector [example2] [corner={left,bottom},location={left,bottom}]
        {\framed{4}}

\startTEXpage
        \composedcollector{example2}
\stopTEXpage

\stoptext

Notice that the size of the collected object grows as text is added. As a consequence, the positions of the corners get redefined as the bounding box grows.


TODO: We need more documentation and examples for this complicated subject. (See: To-Do List)