private void otvoriTabeluTipova(object sender, RoutedEventArgs args)
        {
            TabelaTipova tabela = new TabelaTipova(this.parent);

            tabela.ShowDialog();
            TipLokala tip1 = tabela.IzabraniTip;

            if (tip1 != null && !tip1.Equals(tip))
            {
                noviTip          = tip1;
                this.DataContext = noviTip;
                OznakaTipa.Text  = tip1.Oznaka;
            }
        }
        private void oznakaTextChanged(object sender, TextChangedEventArgs args)
        {
            System.Windows.Controls.TextBox box = (System.Windows.Controls.TextBox)sender;
            TipLokala tip1 = parent.repoTipovi.nadjiPoOznaci(box.Text);

            if (tip.Equals(tip1))
            {
                noviTip          = null;
                this.DataContext = null;
                return;
            }
            noviTip          = tip1;
            this.DataContext = noviTip;
        }