hello vaadiners
what kind of listener should I add to a formfield ( a textfield in a form) to save its value to the database when the value changes?
I attach a screenshot to explain the details…
And I also enclose the source code of my form
As you can see it is a kind of master-detail view with a table ( as a master view ), and a form on the bottom left ( as a detail view)
As you can see there is only one editable field on the form ( complexity)
I would like to do the following:
if a change the value/text in the field then do something ( for example save it to the database)
I think I have tried everything to make it happen but nothing happened when I changed the the text in the field
What is wrong with my code and what is the correct way to achieve what I want?
here is my code:
package com.digicpictures.dproject_web.mytickets;
import java.util.HashMap;
import java.util.Iterator;
import com.digicpictures.dproject_web.Dproject_webApplication;
import com.digicpictures.dproject_web.Resource;
import com.digicpictures.dproject_web.Translations;
import com.vaadin.data.Item;
import com.vaadin.ui.ComboBox;
import com.vaadin.ui.Component;
import com.vaadin.ui.DefaultFieldFactory;
import com.vaadin.ui.Field;
import com.vaadin.ui.Form;
import com.vaadin.ui.TextField;
@SuppressWarnings("serial")
public class MyTicketsEditor extends Form {
Translations translations=null;
HashMap<String, Resource> resources = null;
private MyTickets master;
final ComboBox issuer=new ComboBox();
final ComboBox responsible=new ComboBox();
final ComboBox category=new ComboBox();
final ComboBox abstractCategory=new ComboBox();
public MyTicketsEditor (){
setSizeFull();
setWriteThrough(true); // we want explicit 'apply'
//setInvalidCommitted(false); // no invalid values in datamodel
setImmediate(true);
setVisible(true);
setItemDataSource(null);
}
/*
* Override to get control over where fields are placed.
*/
@Override
protected void attachField(Object propertyId, Field field) {
super.attachField(propertyId, field);
}
/* (non-Javadoc)
* @see com.vaadin.ui.Form#attach()
*/
@Override
public void attach() {
// TODO Auto-generated method stub
super.attach();
Dproject_webApplication application =(Dproject_webApplication) getApplication();
translations=application.translations;
resources= application.getResourcesMap();
populatePersonComboBoxes();
setFormFieldFactory(new DefaultFieldFactory() {
@Override
public Field createField(Item item, Object propertyId,
Component uiContext) {
Field field;
if (propertyId.equals("dpc_from")) {
field = issuer;
}
else if (propertyId.equals("dpc_to")) {
field = responsible;
}
else {
field = super.createField(item, propertyId, uiContext);
}
field.setReadOnly(true);
/* Set null representation of all text fields to empty */
if (field instanceof TextField) {
((TextField) field).setNullRepresentation("");
}
//field.setWidth("80%");
if (propertyId.equals("dpc_name")){
field.setWidth("100%");
}
if (propertyId.equals("dpc_complexity")){
field.setReadOnly(false);
}
/* Set the correct caption to each field */
for (int i = 0; i < MyTickets.NATURAL_COL_ORDER.length; i++) {
if (MyTickets.NATURAL_COL_ORDER[i]
.equals(propertyId)) {
field.setCaption(master.ColumnHeaders[i]
);
}
}
return field;
}
});
}
/**
* @return the master
*/
public MyTickets getMaster() {
return master;
}
/**
* @param master the master to set
*/
public void setMaster(MyTickets master) {
this.master = master;
}
private void populatePersonComboBoxes () {
issuer.addContainerProperty("dpc_name", String.class, "");
responsible.addContainerProperty("dpc_name", String.class, "");
Iterator<Resource> it = resources.values().iterator();
while (it.hasNext()) {
Resource emp = (Resource) it.next();
Item itemIssuer= issuer.addItem(emp.getDpc_handle());
Item itemResponsible= responsible.addItem(emp.getDpc_handle());
itemIssuer.getItemProperty("dpc_name").setValue(emp.getDpc_name());
itemResponsible.getItemProperty("dpc_name").setValue(emp.getDpc_name());
}
issuer.setItemCaptionPropertyId("dpc_name");
responsible.setItemCaptionPropertyId("dpc_name");
}
/* (non-Javadoc)
* @see com.vaadin.ui.AbstractField#valueChange(com.vaadin.data.Property.ValueChangeEvent)
*/
@Override
public void valueChange(com.vaadin.data.Property.ValueChangeEvent event) {
// TODO Auto-generated method stub
super.valueChange(event);
System.out.println (event.getProperty()+" has been modified");
}
}
