Method cursorSprite

texteditor/cursor.go:127–154

cursorSprite returns the sprite for the cursor, which is only rendered once with a vertical bar, and just activated and inactivated depending on render status.

(on bool)

// only rendered once with a vertical bar, and just activated and inactivated
// depending on render status.
func (ed *Editor) cursorSprite(on bool) *core.Sprite {
	sc := ed.Scene
	if sc == nil {
		return nil
	}
	ms := sc.Stage.Main
	if ms == nil {
		return nil // only MainStage has sprites
	}
	spnm := ed.cursorSpriteName()
	sp, ok := ms.Sprites.SpriteByName(spnm)
	if !ok {
		bbsz := image.Point{int(math32.Ceil(ed.CursorWidth.Dots)), int(math32.Ceil(ed.fontHeight))}
		if bbsz.X < 2 { // at least 2
			bbsz.X = 2
		}
		sp = core.NewSprite(spnm, bbsz, image.Point{})
		ibox := sp.Pixels.Bounds()
		draw.Draw(sp.Pixels, ibox, ed.CursorColor, image.Point{}, draw.Src)
		ms.Sprites.Add(sp)
	}
	if on {
		ms.Sprites.ActivateSprite(sp.Name)
	} else {
		ms.Sprites.InactivateSprite(sp.Name)
	}
	return sp
}