How to autosize form fields

I use form.fields from EXTJS API. My application is totally dynamically.

It is possible to autosize combobox thanks to value which are on store ? Or i need to make my own method... ?!

Actually, my combobox , is declared as following :

itemId : 'materialid',

         xtype : 'combobox',
            anchor : '35%',
            store : materialstore,
            id : 'Material',
            queryMode: 'local',
            displayField: 'data',
            width : 50,
            valueField: 'data',
            editable : false,
            grow : true,
            enforceMaxLength : true,
            listeners : {

                render : function(me){

                    var obj = materialstore.findRecord('data',materialdefaultvalue);
                    me.setValue(obj.get('data'),obj);


                }

            },

         padding : '0 30 0 30',
         fieldLabel : 'Material',

          name : 'material',
          listeners : {


            blur : function(me){


                var fieldva开发者_运维知识库lue = me.getValue();
                var sel = monPretree.getView().getSelectedRecords();

                for ( var i = 0 ; i < sel.length ; i++){

                    alert(sel[i].get('id') + ' && ' + material);

                }
            }
          }

Thanks :)

Unfortunately not. Your best bet would be either to set a fixed width (like you have) or set it to '100%'.

A quick note for future questions: it is better to ask them over on the Sencha forums, as you will get a quicker response.