/// <summary>
/// The method that invoked when double click.
/// </summary>
private void DoubleClick()
{
if (Input.GetMouseButtonDown(0))
{
_fieldController.DoubleClickRectangle(_mousePos); // delete rectangle by mouse position.
}
else if (Input.GetMouseButtonDown(1))
{
_fieldController.DoubleClickConnection(_mousePos); // delete connection by mouse position.
}
}