child? ( parent child -- ? )
Factor handbook » UI framework » Building user interfaces » Gadget hierarchy and layouts » Layout basics

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Vocabulary
ui.gadgets

Inputs

parent	a gadget
child	a gadget

Outputs

?

a boolean

Word description
Tests if child is contained inside parent.

Definition

USING: accessors combinators kernel ;

IN: ui.gadgets

: child? ( parent child -- ? )
    {
        { [ 2dup eq? ] [ 2drop t ] }
        { [ dup not ] [ 2drop f ] }
        [ parent>> child? ]
    } cond ;