iTextSharp.text.pdf.AcroFields.GetNewPushbuttonFromField C# (CSharp) Method

        public PushbuttonField GetNewPushbuttonFromField(String field, int order) {
            if (GetFieldType(field) != FIELD_TYPE_PUSHBUTTON)
                return null;
            Item item = GetFieldItem(field);
            if (order >= item.Size)
                return null;
            int posi = order * 5;
            float[] pos = GetFieldPositions(field);
            Rectangle box = new Rectangle(pos[posi + 1], pos[posi + 2], pos[posi + 3], pos[posi + 4]);
            PushbuttonField newButton = new PushbuttonField(writer, box, null);
            PdfDictionary dic = item.GetMerged(order);
            DecodeGenericDictionary(dic, newButton);
            PdfDictionary mk = dic.GetAsDict(PdfName.MK);
            if (mk != null) {
                PdfString text = mk.GetAsString(PdfName.CA);
                if (text != null)
                    newButton.Text = text.ToUnicodeString();
                PdfNumber tp = mk.GetAsNumber(PdfName.TP);
                if (tp != null)
                    newButton.Layout = tp.IntValue + 1;
                PdfDictionary ifit = mk.GetAsDict(PdfName.IF);
                if (ifit != null) {
                    PdfName sw = ifit.GetAsName(PdfName.SW);
                    if (sw != null) {
                        int scale = PushbuttonField.SCALE_ICON_ALWAYS;
                        if (sw.Equals(PdfName.B))
                            scale = PushbuttonField.SCALE_ICON_IS_TOO_BIG;
                        else if (sw.Equals(PdfName.S))
                            scale = PushbuttonField.SCALE_ICON_IS_TOO_SMALL;
                        else if (sw.Equals(PdfName.N))
                            scale = PushbuttonField.SCALE_ICON_NEVER;
                        newButton.ScaleIcon = scale;
                    }
                    sw = ifit.GetAsName(PdfName.S);
                    if (sw != null) {
                        if (sw.Equals(PdfName.A))
                            newButton.ProportionalIcon = false;
                    }
                    PdfArray aj = ifit.GetAsArray(PdfName.A);
                    if (aj != null && aj.Size == 2) {
                        float left = aj.GetAsNumber(0).FloatValue;
                        float bottom = aj.GetAsNumber(1).FloatValue;
                        newButton.IconHorizontalAdjustment = left;
                        newButton.IconVerticalAdjustment = bottom;
                    }
                    PdfBoolean fb = ifit.GetAsBoolean(PdfName.FB);
                    if (fb != null && fb.BooleanValue)
                        newButton.IconFitToBounds = true;
                }
                PdfObject i = mk.Get(PdfName.I);
                if (i != null && i.IsIndirect())
                    newButton.IconReference = (PRIndirectReference)i;
            }
            return newButton;
        }