Difference between revisions of "Layers"
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Maarten-Jan (talk | contribs) (made some corrections and added to Layers and Graphics categories) |
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=My first Layer= | =My first Layer= | ||
− | Define a layer that takes the whole page | + | Define a layer that takes the whole page |
<texcode> | <texcode> | ||
\definelayer [mybg] % name of the layer | \definelayer [mybg] % name of the layer | ||
− | [x= | + | [x=0mm, y=0mm, % from upper left corner of paper |
− | width=\paperwidth, height=\paperheight] | + | width=\paperwidth, height=\paperheight] % let the layer cover the full paper |
</texcode> | </texcode> | ||
− | Now you can put something | + | Now you can put something in that layer: |
<texcode> | <texcode> | ||
\setlayer [mybg] % name of the layer | \setlayer [mybg] % name of the layer | ||
− | [ | + | [hoffset=1cm, voffset=1cm] % placement (from upper left corner of the layer) |
− | {\framed[frame=on, width=3cm, height=2cm]{LAYER}} | + | {\framed[frame=on, width=3cm, height=2cm]{LAYER}} % the actual contents of the layer |
</texcode> | </texcode> | ||
Activate the layer as a background: | Activate the layer as a background: | ||
<texcode> | <texcode> | ||
− | \setupbackgrounds [page] [background=mybg] | + | \setupbackgrounds[page][background=mybg] |
</texcode> | </texcode> | ||
− | + | This command makes the layer appear only once after the background is activated. If you want to repeat the layer on each page, use the option <code>repeat=yes</code> in the <cmd>definelayer</cmd> command. | |
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− | |||
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==Placement== | ==Placement== | ||
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* Source: [[source:page-lyr.tex|page-lyr]] | * Source: [[source:page-lyr.tex|page-lyr]] | ||
* Example of [[alternating backgrounds and repeating layers]] | * Example of [[alternating backgrounds and repeating layers]] | ||
+ | |||
{{todo|We need a lot of documentation and samples for this complicated subject.}} | {{todo|We need a lot of documentation and samples for this complicated subject.}} | ||
+ | |||
+ | [[Category:Graphics]] [[Category:Layers]] |
Revision as of 15:03, 9 March 2007
< Layout | Columns | Overlays | Logos >
Layers are ConTeXt's mechanism for absolute positioning of elements and other advanced techniques like switching elements on and off.
There's still no manual about them.
My first Layer
Define a layer that takes the whole page
\definelayer [mybg] % name of the layer [x=0mm, y=0mm, % from upper left corner of paper width=\paperwidth, height=\paperheight] % let the layer cover the full paper
Now you can put something in that layer:
\setlayer [mybg] % name of the layer [hoffset=1cm, voffset=1cm] % placement (from upper left corner of the layer) {\framed[frame=on, width=3cm, height=2cm]{LAYER}} % the actual contents of the layer
Activate the layer as a background:
\setupbackgrounds[page][background=mybg]
This command makes the layer appear only once after the background is activated. If you want to repeat the layer on each page, use the option repeat=yes
in the \definelayer command.
Placement
There are several possibilities for defining the placement of layer content:
- x, y : offset from upper left corner of paper
- hoffset, voffset : offset from upper left corner of layer
- corner : reference point, something like
{left, top}
- location : alignment of the element relative to the corner, something like
{right, bottom}
- preset : a named location, see below
There are some "presets" for paper egde placement:
% These four are defined by ConTeXt! \definelayerpreset [lefttop] [corner={left,top}, location={right,bottom}] \definelayerpreset [righttop] [corner={right,top}, location={left,bottom}] \definelayerpreset [leftbottom] [corner={left,bottom}, location={right,top}] \definelayerpreset [rightbottom] [corner={right,bottom}, location={left,top}]
Similarly you can define your own presets.
Links
- Some applications in the Details manual
- Sample documents: BusinessCard and Letter style
- Source: page-lyr
- Example of alternating backgrounds and repeating layers
TODO: We need a lot of documentation and samples for this complicated subject. (See: To-Do List) |