line-metrics ( font string -- metrics )
Factor handbook » UI framework » Implementing new gadgets » Customizing gadget appearance » Implementing custom drawing logic » Rendering text

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Vocabulary
ui.text

Inputs

font	a font
string	a string

Outputs

metrics

a line-metrics

Generic word contract
Outputs a metrics object with text measurements.

Definition

USING: ui.text.private ;

IN: ui.text

HOOK: line-metrics font-renderer ( font string -- metrics )

Methods

USING: accessors core-text kernel sequences ui.text
ui.text.core-text ui.text.core-text.private ;

M: core-text-renderer line-metrics
    [ " " line-metrics clone 0 >>width ]
    [ cached-line metrics>> scale-metrics ] if-empty ;