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Hello everyone,
I'm using a already populated combobox with a prefilled model that is always non-empty.
At a certain point I need to fire a selection event, so that the event handler associated with the combobox is invoked, but I'm quite confused about the construction of the SelectEvent<T, E> object.
Here's the event listener
@Listen("onSelect=#cmbMyCombobox")
public void onMyComboboxSelection(SelectEvent<Combobox, MyObject> evtSelect) {
Set<MyObject> selectedObjects = evtSelect.getSelectedObjects();
int size = selectedObjects.size();
MyObject selectedStuff= selectedObjects.toArray(new MyObject[ size ])[0];
// do things with the selectedStuff
}And here's the method that tries to fire the event
private void fireFirstPowuaServerSelectionEvent() {
ListModel<MyObject> model = (ListModel<MyObject>) cmbMyCombobox.getModel();
MyObject stuffIWantToSelect = model.getElementAt(0);
Set<MyObject> selectedItems= new HashSet<MyObject>();
selectedItems.add(stuffIWantToSelect);
SelectEvent<Combobox, MyObject> evtSelection = new SelectEvent<Combobox, MyObject>( ... ? ...);
Events.echoEvent(evtSelection);
}
Main questions are:
1- what is the appropriate constructor I should use?
2- one of the constructors need a set of selected *ITEMS* and a set of selected *OBJECTS*. What is the difference between them? Are the items the combo items? Is the items set nullable?
3- the longest constructor includes a "ref" parameter. What is it for?
Thanks in advance
How about this:
The code below is an example of Combobox derived class, that use an EJB Session Bean ( <BEAN> ) and EJB EntityBean( <Data> which is a POJO too)
public abstract class ComboboxExt<BEAN, DATA> extends Combobox
{
private static final Logger logger = LoggerFactory.getLogger( ComboboxExt.class );
private static final long serialVersionUID = 5803878398952556887L;
private Class<BEAN> persistentClass;
private transient BEAN session = null;
private List<DetailInterface> details;
protected abstract Class<BEAN> getSessionClass( );
protected abstract void load( );
public ComboboxExt( )
{
super( );
setPersistentClass( );
}
public ComboboxExt( String value ) throws WrongValueException
{
super( value );
setPersistentClass( );
}
@Override
public void setSelectedItem( Comboitem item )
{
logger.info( "setSelectedItem: " + item.getValue( ).toString( ) );
super.setSelectedItem( item );
processOnSelect( );
}
private void processOnSelect( )
{
logger.info( "processOnSelect: " + this.getClass( ).getSimpleName( ) );
Events.sendEvent( this, new Event( Events.ON_SELECT, this ) );
}
public DATA getSelectedValue( )
{
Comboitem item = getSelectedItem( );
if ( item != null && item.getValue( ) != null ) {
return item.getValue( );
}
else {
return null;
}
}
public void load( List<DATA> list, DATA itemToSelect, boolean bSelectFirst )
{
getChildren( ).clear( );
if ( SysUtils.isEmpty( list ) == false ) {
Comboitem selectedItem = null;
for ( DATA dto : list ) {
Comboitem item = appendItem( dto.toString( ) );
if ( item != null ) {
item.setValue( dto );
if ( itemToSelect != null && item.equals( itemToSelect ) ) {
selectedItem = item;
}
}
}
if ( selectedItem != null ) {
setSelectedItem( selectedItem );
}
else {
if ( bSelectFirst ) {
setSelectedIndex( 0 );
}
}
}
}
protected void setPersistentClass( )
{
this.persistentClass = getSessionClass( );
}
@SuppressWarnings( "unchecked" )
public BEAN getSession( )
{
try {
if ( this.session == null ) {
this.session = ( (BEAN) ServiceLocator.getInstance( ).getRemoteSession( this.persistentClass ) );
}
}
catch ( NamingException e ) {
e.printStackTrace( );
}
return this.session;
}
public void find( DATA item )
{
if ( getItemCount( ) <= 0 || item == null ) {
return;
}
logger.info( "Looking for: " + item.toString( ) );
for ( Component child : getChildren( ) ) {
if ( child instanceof Comboitem ) {
Comboitem cbItem = (Comboitem) child;
if ( cbItem.getValue( ).equals( item ) ) {
setSelectedItem( cbItem );
break;
}
}
}
}
private List<DetailInterface> getDetails( )
{
if ( this.details == null ) {
this.details = new ArrayList<DetailInterface>( );
}
return this.details;
}
public void addDetail( DetailInterface newDetail )
{
getDetails( ).add( newDetail );
}
public void onSelect( Event evt )
{
logger.info( "onSelect: " + evt.getTarget( ).getId( ) );
for ( DetailInterface item : getDetails( ) ) {
item.onChangeMaster( getSelectedValue( ) );
}
evt.stopPropagation( );
}
public void onCreate( Event evt )
{
if ( ( this instanceof DetailInterface ) == false && this.getItemCount( ) == 0 )
{
logger.info( "onCreate calling load: " + evt.getTarget( ).getId( ) );
load( );
}
}
}
This is where I send a select event
private void processOnSelect( )
{
logger.info( "processOnSelect: " + this.getClass( ).getSimpleName( ) );
Events.sendEvent( this, new Event( Events.ON_SELECT, this ) );
}
As you can see, this is an abstract class, so this is an example of it
public class CityCombobox extends ComboboxExt<CitySession, City> implements DetailInterface
{
private static final Logger logger = LoggerFactory.getLogger( CityCombobox.class );
private static final long serialVersionUID = 1180477829375738059L;
@Override
public void onChangeMaster( Object master )
{
logger.info( "onChangeMaster" );
load( ( (State) master ) );
}
public void load( State state )
{
logger.info( String.format( "load(%s)", state.getDescription( ) ) );
load( getSession( ).getAll( state ), null, true );
}
@Override
protected Class<CitySession> getSessionClass( )
{
return CitySession.class;
}
@Override
protected void load( )
{
}
}
or
public class GenderCombobox extends ComboboxExt<GenderSession, Gender>
{
private static final Logger logger = LoggerFactory.getLogger( GenderCombobox.class );
private static final long serialVersionUID = -7706250007578273124L;
@Override
protected Class<GenderSession> getSessionClass( )
{
return GenderSession.class;
}
@Override
public void load( )
{
logger.info( "load" );
load( ( (List<Gender>) getSession( ).getAll( ) ), null, true );
}
}
going on.... gender is just and EJB Entity Bean
@Entity
@NamedQueries( { @NamedQuery( name = "Gender.findAll", query = "select o from Gender o" ) } )
@Table( name = "\"gender\"" )
public class Gender extends SimpleTable<Gender>
{
private static final long serialVersionUID = 3372468873867948006L;
@Column( name = "gnd_description_ch", nullable = false )
private String description;
@Id
@Column( name = "gnd_id_in", nullable = false )
private Integer id;
@Override
public String getDescription()
{
return this.description;
}
@Override
public void setDescription( String gnd_description_ch )
{
this.description = gnd_description_ch;
}
@Override
public Integer getId()
{
return this.id;
}
@Override
public void setId( Integer gnd_id_in )
{
this.id = gnd_id_in;
}
}
How to use it: use 'use'!!!!
<?xml version="1.0" encoding="UTF-8"?> <zk xmlns="http://www.zkoss.org/2005/zul" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.zkoss.org/2005/zul http://www.zkoss.org/2005/zul/zul.xsd "> <grid fixedLayout="true"> <columns> <column width="20%"/> <column/> </columns> <rows> <row> <label value="CPF" /> <textbox id="cpf" width="200px" maxlength="14" /> </row> <row> <label value="Nome Completo" /> <textbox id="name" hflex = "1" maxlength="128" /> </row> <row> <label value="Sexo" /> <combobox id="gender" width="200px" readonly="true" use= "br.com.mcampos.web.core.combobox.GenderCombobox"/> </row> <row> <label value="Tratamento" /> <combobox id="title" width="200px" readonly="true" use="br.com.mcampos.web.core.combobox.TitleCombobox"/> </row> <row> <label value="Estado Civil"/> <combobox id="maritalStatus" width="200px" readonly="true" use="br.com.mcampos.web.core.combobox.CivilStateCombobox"/> </row> <row> <label value="Data Nascimento"/> <hlayout valign="middle"> <datebox id="birthdate" format="dd/MM/yyyy"/> <label value="DD/MM/YYYY. Ex.: 25/12/2009"/> </hlayout> </row> <row> <label value="Naturalidade"/> <vbox width="100%"> <combobox id="bornState" width="300px" readonly="true" use="br.com.mcampos.web.core.combobox.StateCombobox" /> <combobox id="bornCity" width="500px" readonly="true" use="br.com.mcampos.web.core.combobox.CityCombobox"/> </vbox> </row> <row> <label value="Nome do Pai"/> <textbox id="fatherName" hflex = "1" maxlength="128"/> </row> <row> <label value="Nome da Mãe"/> <textbox id="motherName" hflex = "1" maxlength="128"/> </row> </rows> </grid> </zk>
Asked: 2012-07-27 14:29:25 +0800
Seen: 233 times
Last updated: Jul 27 '12