private void mnPromeniElement_Click(object sender, EventArgs e) { if (clickedItem == null || clickedItem.Element == null) { return; } clearClipboard(); Element element = clickedItem.Element; ElementForm form = new ElementForm(element.Id, element.Sprava, element.Grupa, element.Broj, element.Tezina); if (form.ShowDialog() == DialogResult.OK) { tabela.promeniElement(element, form.Element); clickedItem.Element = form.Element; panelTabela.Invalidate(); panelTabela.Focus(); } }