SAPUI5 Custom Popup Dialog

yenidegeral : function(field) {

                var new_value;

                                var that = this;

                                var oDialog1 = new sap.m.Dialog();

                                oDialog1.setTitle(" Yeni Değer");

                                var oTextArea = new sap.m.TextArea();

                                oTextArea.setWidth("100%");

                                oDialog1.addContent(oTextArea);

                                oDialog1.addButton(new sap.m.Button( {

                text : "KAYDET",

                press : function() {

new_value = oDialog1.mAggregations.content["0"].mProperties.value;

                                switch (field) {

                                case "softana":

                                                new_sw = new_value;

                                                model.oData.d.results[0].softana = new_value;

                                                break;

                                case "pcf":

                                                new_pcf = new_value;

                                                model.oData.d.results[0].pcf = new_value;

                                                break;

                                case "mboot":

                                                new_mboot = new_value;

                                                model.oData.d.results[0].mboot = new_value;

                                                break;

                                case "cdf":

                                                new_cdf = new_value;

                                                model.oData.d.results[0].cdf = new_value;

                                                break;

                                case "svn":

                                                new_svn = new_value;

                                                model.oData.d.results[0].svn = new_value;

                                                break;

                                }

                                model.setData(model.oData);

                                that.byId(field).setText(

                                                                new_value);

                                that.getView().setModel(model);

                                that.getView().getModel()

                                                                .refresh(true);

                                oDialog1.close();

                }                                                                              }));

                                oDialog1.addButton(new sap.m.Button({

                                                text : "CANCEL",

                                                press : function() {

                                                                oDialog1.close();

                                                }

                                }));

                                oDialog1.open();