pref-dim ( gadget -- dim )
Factor handbook » UI framework » Building user interfaces » Gadget hierarchy and layouts » Implementing layout gadgets

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Vocabulary
ui.gadgets

Inputs

gadget

a gadget

Outputs

dim	a pair of integers

Word description
Outputs the preferred dimensions of the gadget. The value is cached between calls, and invalidated when the gadget needs to be relayout.

See also
pref-dim*, layout, layout*

Definition

USING: accessors kernel ;

IN: ui.gadgets

: pref-dim ( gadget -- dim )
    [ pref-dim>> ] [
        [ pref-dim* ] [ ] [ layout-state>> ] tri
        [ drop ] [ dupd pref-dim<< ] if
    ] ?unless ;