public void SetColumnHeader(ColumnHeader columnHeader, UnityDataSheet uds, int column)
        {
            // unregister listeners before values change, since values are about to change.
            ClearInputTextBoxListeners();

            this.uds    = uds;
            this.column = column;
            cHeader     = columnHeader;
            TokenErrorLog errLog = new TokenErrorLog();
            // setup script value
            Token t = cHeader.columnSetting.fieldToken;
            //string textA = t.GetAsSmallText();
            //string textB = t.Stringify();
            //string textC = t.StringifySmall();
            //string textD = t.ToString();
            string text = t.GetAsBasicToken();

            //Show.Log("A: "+textA+"\nB:" + textB + "\nC:" + textC + "\nD:" + textD + "\nE:" + text);
            scriptValue.text = text;
            EventBind.On(scriptValue.onValueChanged, this, OnScriptValueEdit);
            // implicitly setup value types dropdown
            OnScriptValueEdit(text);
            // setup column label
            object labelText = cHeader.columnSetting.data.label.Resolve(errLog, uds.data);

            if (errLog.HasError())
            {
                popup.Set("err", defaultValue.gameObject, errLog.GetErrorString() + Proc.Now); return;
            }
            columnLabel.text = labelText.StringifySmall();
            EventBind.On(columnLabel.onValueChanged, this, OnLabelEdit);
            // setup column width
            columnWidth.text = cHeader.columnSetting.data.widthOfColumn.ToString();
            EventBind.On(columnWidth.onValueChanged, this, OnColumnWidthEdit);
            // setup column index
            columnIndex.text = column.ToString();
            EventBind.On(columnIndex.onValueChanged, this, OnIndexEdit);
            // setup column type
            List <ModalConfirmation.Entry> entries = columnTypes.ConvertAll(c => {
                string dropdownLabel;
                if (c.uiField != null && !string.IsNullOrEmpty(c.name))
                {
                    dropdownLabel = "/*" + c.name + "*/ " + c.uiField.name;
                }
                else
                {
                    dropdownLabel = c.name;
                }
                return(new ModalConfirmation.Entry(dropdownLabel, null));
            });

            t = cHeader.columnSetting.data.columnUi;
            string fieldTypeText = t.ToString();            //cHeader.columnSetting.data.columnUi.GetAsBasicToken();//ResolveString(errLog, null);
            int    currentIndex  = columnTypes.FindIndex(c => fieldTypeText.StartsWith(c.uiField.name)) + 1;

            //Show.Log(currentIndex+" field  " + fieldTypeText);
            DropDownEvent.PopulateDropdown(fieldType, entries, this, SetFieldType, currentIndex, true);
            if (currentIndex == 0)
            {
                DropDownEvent.SetCustomValue(fieldType.gameObject, fieldTypeText);
            }
            TMP_InputField elementUiInputField = fieldType.GetComponentInChildren <TMP_InputField>();

            if (elementUiInputField != null)
            {
                elementUiInputField.onValueChanged.RemoveAllListeners();
                //Show.Log("bind to "+elementUiInputField.name);
                EventBind.On(elementUiInputField.onValueChanged, this, OnSetFieldTypeText);
            }
            // setup default value
            object defVal = cHeader.columnSetting.defaultValue;

            if (defVal != null)
            {
                defaultValue.text = defVal.ToString();
            }
            else
            {
                defaultValue.text = "";
            }
            EventBind.On(defaultValue.onValueChanged, this, OnSetDefaultValue);
            // setup column destroy option
            EventBind.On(trashColumn.onClick, this, ColumnRemove);
            popup.Hide();
        }