39 lines
1.9 KiB
Factor
39 lines
1.9 KiB
Factor
USING: help.syntax help.markup kernel math classes classes.tuple
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calendar models ;
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IN: models.product
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HELP: product
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{ $class-description "Product model values are computed by collecting the values from a sequence of underlying models into a new sequence. Product models are automatically updated when underlying models change. Product models are constructed by " { $link <product> } "."
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$nl
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"A product model whose children are all " { $link "models-range" } " conforms to the " { $link "range-model-protocol" } " and represents a point in n-dimensional space which is bounded by a rectangle." }
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{ $examples
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"The following code displays a pair of sliders, and an updating label showing their current values:"
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{ $code
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"USING: models models.product models.range ui.gadgets"
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"ui.gadgets.labels ui.gadgets.packs ui.gadgets.panes"
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"ui.gadgets.sliders ;"
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""
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": <funny-model> ( -- model ) 0 10 0 100 1 <range> ;"
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": <funny-slider> ( model -- slider ) horizontal <slider> ;"
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""
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"<funny-model> <funny-model> 2array"
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"[ <pile> [ horizontal <slider> add-gadget ] reduce gadget. ]"
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"[ <product> [ unparse ] <arrow> <label-control> gadget. ]"
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"bi"
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}
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} ;
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HELP: <product>
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{ $values { "models" "a sequence of models" } { "product" "a new " { $link product } } }
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{ $description "Creates a new instance of " { $link product } ". The value of the new product model is obtained by mapping the " { $snippet "value" } " slot accessor over the given sequence of models." }
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{ $examples "See the example in the documentation for " { $link product } "." } ;
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ARTICLE: "models.product" "Product models"
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"Product model values are computed by collecting the values from a sequence of underlying models into a new sequence."
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{ $subsections
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product
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<product>
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} ;
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ABOUT: "models.product"
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