line-leading ( gadget -- n )
Factor handbook » UI framework » Implementing new gadgets » Gadget line support
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Vocabulary
ui.gadgets.line-support

Inputs
gadgetan object


Outputs
nan object


Definition
IN: ui.gadgets.line-support

GENERIC: line-leading ( gadget -- n )


Methods
USING: accessors kernel ui.gadgets.line-support ;

M: line-gadget line-leading
[ line-leading>> ] [
[ line-leading* ] [ ] [ layout-state>> ] tri
[ drop ] [ dupd line-leading<< ] if
] ?unless ;