func GetFontHeight(fd draw2d.FontData, size float64) (height float64) {
font := draw2d.GetFont(fd)
fupe := font.FUnitsPerEm()
bounds := font.Bounds(fupe)
height = float64(bounds.YMax-bounds.YMin) * size / float64(fupe)
return
}
func (l *Label) draw(gc draw2d.GraphicContext) {
gc.SetStrokeColor(color.Black)
font := draw2d.GetFont(gc.GetFontData())
bounds := font.Bounds()
height := float64(bounds.YMax-bounds.YMin) * l.FontSize / float64(font.UnitsPerEm())
offset := l.Size.Y - (l.Size.Y-height)/2
safeRect(gc, Coord{0, 0}, l.Size)
gc.FillStroke()
gc.Translate(10, offset)
gc.SetFontSize(l.FontSize)
gc.FillString(l.Text)
}