Method Insert

graphicseffects.go:250–263

(index int, effect WidgetGraphicsEffect)

}

func (l *WidgetGraphicsEffectList) Insert(index int, effect WidgetGraphicsEffect) error {
	observer := l.observer

	l.insertIntoSlice(index, effect)

	if observer != nil {
		if err := observer.onInsertedGraphicsEffect(index, effect); err != nil {
			l.items = append(l.items[:index], l.items[index+1:]...)
			return err
		}
	}

	return nil
}

func (l *WidgetGraphicsEffectList) Len() int {
	return len(l.items)