How to set default value into combobox - vaadin

Vaadin 6 / 7 / 8
1

Good Day Expert!

How to set default value into combobox :

Here is my source codes, i would like make the values that passing from method setGender():

// generate Genders into combobox value
        Collection<GenderTable> gendertable= getRecordGenders();
        Container container= new ListContainer<RefGenders>(GenderTable.class, genderTable);
        combobox_gender.setContainerDataSource(container);
        combobox_gender.setItemCaptionPropertyId("nameGender");


noid_textfield.addValueChangeListener(new ValueChangeListener() {
@Override
public void valueChange(ValueChangeEvent event) {
String gender = setGenders();
String genderName = "";

if("F".equalsIgnoreCase(gender)){
                    genderName ="Female";
                }else{
                    genderName ="Male";
                }

GenderTable genderTable = new RefGenders(gender, genderName);
PropertysetItem item = new ProppertysetItme();
FieldGroup binder = new FieldGroup(item);
binder(combobox_gender , "GenderTable");
    }
        });

The result at display page , the Combobox Gender - “combobox_gender” are gray. and its not bind properly. any solution that can fix this.


Thank you Very much!

2

Hi,

Can you describe what exactly you want to achieve? Looks like too much code to deal only with two genders :wink: In any case, I’ll share some ideas that might help. I would define an enum like the following:


public enum Gender { FEMALE, MALE }

And then just add the options to the ComboBox like this:


ComboBox gender = new ComboBox();
gender.addItems(Gender.values());

And if you want to set a “default value” you can do:


gender.setValue(Gender.FEMALE);

Also, if you have a domain class like this:

[font=courier new]
public static class Person {
…
private Gender gender;

  ... getters and setters ...

}
[/font]

You can bind to a particular instance using the
BeanFieldGroup.bindFieldsUnbuffered
 static method.

But I don’t understand well your use case particularly the TextField and its change listener.

3

Hi Alejandro,

I did that because my country using ID card number that contain number of male or female in noid_textfield. So that’s why i used TextField with change Listener. From the number of TextField it wll load combobox Gender with a default value that set from listener textfied ID without removing the gender name list.

  • Above codes its just example that will help me as a based.

  • I would like result like below. which default value is male which get from last number from textfield, if even is for Male, uneven is for Female:

  • If you can give me how to set default value to Combobox using FieldGroup bind, its really awesome to me.

4

Good Day!

I have found the solutions for this , here is my code:

// generate Genders into combobox value
        Collection<GenderTable> gendertable= getRecordGenders();
        Container container= new ListContainer<RefGenders>(GenderTable.class, genderTable);
        combobox_gender.setContainerDataSource(container);
        combobox_gender.setItemCaptionPropertyId("nameGender");

noid_textfield.addValueChangeListener(new ValueChangeListener() {
@Override
public void valueChange(ValueChangeEvent event) {
// getGenders(); get the return gender code


               @SuppressWarnings("unchecked")
                Iterator<GenderTable> iterator = (Iterator<GenderTable>)  combobox_gender.getItemIds().iterator();
              
              while(iterator.hasNext()) {
                     GenderTable obj = iterator.next();
                     if(obj.getcodeGender().equals(getGender().trim())){
                         gender_combo.setValue(obj);
                         break;
                     }
                     }
    }
        });

I Have changed with this code:
@SuppressWarnings(“unchecked”)
Iterator iterator = (Iterator) combobox_gender.getItemIds().iterator();

          while(iterator.hasNext()) {
                 GenderTable obj = iterator.next();
                 if(obj.getcodeGender().equals(getGender().trim())){
                     gender_combo.setValue(obj);
                     break;
                 }
                 }

a) I using Iterator the combobox by defining into Bean GenderTable.
b) I compare the code Gender from value in combobox_gender with method getGender() which will returning of code gender.