Clever Geek Handbook

Display two or more properties in a ComboBox?

I am trying to display two properties in a ComboBox. I tried setItemCaptionPropertyId()

but this only displays nome

and I want to display nome

and sobreNome

or more properties.

I am trying to do this.

//jpacontainer aluno
private CustomJPAContainer<Aluno> dsAluno = new CustomJPAContainer<Aluno>(Aluno.class);

//combobox aluno
        ComboBox cbxAluno = (ComboBox)field;
        cbxAluno.setItemCaptionMode(ItemCaptionMode.PROPERTY);
        cbxAluno.setConverter(new SingleSelectConverter<Aluno>(cbxAluno));
        cbxAluno.setImmediate(true);
        cbxAluno.setContainerDataSource(dsAluno);
        cbxAluno.setItemCaptionPropertyId("nome");
        cbxAluno.setItemCaptionPropertyId("sobreNome");
        cbxAluno.setWidth("10cm");
        cbxAluno.addValueChangeListener(this);
        tabAluno.addComponent(cbxAluno);

//bean
@Entity
public class Aluno implements Serializable{ 
    private static final long serialVersionUID = 1L;

    @Id 
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    private Long id;

    @NotNull @NotEmpty @Size(min=3, max=50) 
    private String nome;

    @NotNull @NotEmpty @Size(min=3, max=50)
    private String sobreNome;   

}

How to do it?

** I solved the problem **

I created a new attribute named caption

and concatenated strings that I want. After creating getCaption () that return the caption value,

Decision.

@Transient
private String caption;

public String getCaption(){
   caption = nome + " " + sobreNome;
   return caption;
}

cbxAluno.setItemCaptionPropertyId("caption");

it works now.!

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3 answers


I could say something completely stupid, but have you tried to implement the method toString

in your class Aluno

?



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You can create a cascading combo box where you select "Nome" and it populates the second combo box "sobreNome". Or you will need to concatenate all the Nome and SobreNome values ​​together.



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If you can use a custom ComboBox, you can do this:

public class MyComboBox extends ComboBox {

    private static final long serialVersionUID = 1L;
    private List<String> myPropIds = Collections.emptyList();

    @Override
    public void setItemCaptionPropertyId(Object propId) {
        myPropIds = Arrays.asList(((String)propId).split(","));
    }

    @Override
    public String getItemCaption( Object itemId ) {
        StringBuilder sb = new StringBuilder();
        String delimiter = "";
        for (String propId : myPropIds) {
            Property<?> p = getContainerProperty(itemId, propId);
            sb.append(delimiter).append(getMyCaption(p));
            delimiter = " ";
        }
        return sb.toString();
    }

    private String getMyCaption(Property<?> p) {
        String caption = null;
        if (p != null) {
            Object value = p.getValue();
            if (value != null) {
                caption = value.toString();
            }
        }
        return caption != null ? caption : "";
    }

}

Using:

ComboBox cb = new MyComboBox();
cb.setItemCaptionPropertyId("nome,sobreNome");
//...
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