zntg/allg5ui/font.go

package allg5ui

import (
	"opslag.de/schobers/allg5"
	"opslag.de/schobers/geom"
)

type FontDefinition struct {
	Name string
	Size int
}

func NewFontDefinition(name string, size int) FontDefinition {
	return FontDefinition{Name: name, Size: size}
}

type font struct {
	*allg5.Font
}

func newFont(f *allg5.Font) *font {
	return &font{f}
}

func (f *font) Destroy() error {
	f.Font.Destroy()
	return nil
}

func (f *font) Height() float32 {
	if f == nil {
		return 0
	}
	return f.Font.Height()
}

func (f *font) WidthOf(t string) float32 {
	return f.TextWidth(t)
}

func (f *font) Measure(t string) geom.RectangleF32 {
	if f == nil {
		return geom.RectangleF32{}
	}
	// allg5.Font.TextDimentions (previous implementation) seems to return the closest fit rectangle to the drawn text (so depending on the glyphs). allg5.Font.TextWidth is giving the full width (not trimmed) which gives a better result together with allg5.Font.Height.
	w := f.TextWidth(t)
	h := f.Height()
	return geom.RectRelF32(0, 0, w, h)
}