JTable not updating when its content changes - groovy

Question

import groovy.beans.Bindable;
import groovy.swing.SwingBuilder
import java.awt.BorderLayout
import javax.swing.JFrame
#Bindable def people = [[name:"Mary", age:18],
[name:"Tom", age:25]]
def swingBuilder = new SwingBuilder()
swingBuilder.edt { // edt method makes sure UI is build on Event Dispatch Thread.
lookAndFeel 'system' // Simple change in look and feel.
frame( title: 'Display a table',
size: [400,300],
show: true,
locationRelativeTo: null,
defaultCloseOperation: JFrame.EXIT_ON_CLOSE)
{
menuBar() {
menu(text: "File", mnemonic: 'F'){
menuItem(text: "Add",
actionPerformed: {
people << [name:"Harry", age:17]
println people
}
)}
}
panel(layout: new BorderLayout()) {
scrollPane(constraints: BorderLayout.CENTER) {
table() {
def listTeacher
tableModel(list: people) {
propertyColumn(header: 'Name', propertyName: 'name')
propertyColumn(header: 'Age', propertyName: 'age')
}
}
}
}
}
}
When click "Add" one entry is added to the list people but the JTable is not updated. How can I fix it?

Answer 1

You can make it an ObservableList, and then refresh the table model when the list changes in some way:
import groovy.beans.Bindable;
import groovy.swing.SwingBuilder
import java.awt.BorderLayout
import javax.swing.JFrame
import java.beans.PropertyChangeListener
#Bindable ObservableList people = [ [name:"Mary", age:18],
[name:"Tom", age:25] ]
def swingBuilder = new SwingBuilder()
swingBuilder.edt { // edt method makes sure UI is build on Event Dispatch Thread.
lookAndFeel 'system' // Simple change in look and feel.
frame( title: 'Display a table',
size: [400,300],
show: true,
locationRelativeTo: null,
defaultCloseOperation: JFrame.HIDE_ON_CLOSE) {
menuBar() {
menu(text: "File", mnemonic: 'F'){
menuItem(text: "Add", actionPerformed: {
people << [name:"Harry", age:17]
println people
}
) }
}
panel(layout: new BorderLayout()) {
scrollPane(constraints: BorderLayout.CENTER) {
table {
def listTeacher
tableModel( id:'model', list: people) { m ->
propertyColumn(header: 'Name', propertyName: 'name')
propertyColumn(header: 'Age', propertyName: 'age')
}
}
}
people.addPropertyChangeListener( { e -> model.fireTableDataChanged() } as PropertyChangeListener )
}
}
}