APItext

Type MeasureFunc

type MeasureFunc func(value string, fontSize, weight float32) (Metrics, error)

MeasureFunc shapes and measures one line at a logical font size and weight (ui.TextStyle.Weight: 0 is regular) with a platform's own text engine: how wide the platform would draw it, which is not how wide Viva lays it out (layout uses the reference metrics every platform shares). Tools compare the two.