Swing cascading panels with RelativeLayout - swing

Question

With Swing I try to maintain a dynamic list. To show the problem, I have broken down the case to a simple sample and will attach the code here.
The JFrame DynamicDisplaySubPanelMain implements the JPanel DynamicSubPanel2.
This JPanel display the content of a List row by row. At the end an additional row allows to add a String to the list. The JPanel shall then automaically show the longer list and provide a new line to add another String.
Adding Strings works fine - but the changed List is not displayed. Can anyone tell what the reason might be.
import java.awt.BorderLayout;
import javax.swing.JFrame;
public class DynamicSubPanelMain extends JFrame {
private static final long serialVersionUID = 1L;
public DynamicSubPanelMain() {
super("My Sample dynamic List");
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(800, 500);
DynamicSubPanel2 myPane = new DynamicSubPanel2();
getContentPane().add(myPane, BorderLayout.CENTER);
}
public static void main(String[] args) throws Exception {
DynamicSubPanelMain menu = new DynamicSubPanelMain();
menu.setVisible(true);
}
}
And here the JPanel:
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingWorker;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.brunchboy.util.swing.relativelayout.AttributeConstraint;
import com.brunchboy.util.swing.relativelayout.AttributeType;
import com.brunchboy.util.swing.relativelayout.DependencyManager;
import com.brunchboy.util.swing.relativelayout.RelativeLayout;
import de.gombers.tools.helpers.Tools;
public class DynamicSubPanel2 extends JPanel {
private static final long serialVersionUID = 1L;
static final Logger LOGGER = LoggerFactory.getLogger(Tools.getSimpleClassName());
private RelativeLayout relativeLayout = new RelativeLayout();
private int nextIndex=-1;
private int ARRAY_SIZE=100;
private JButton[] actionJB = new JButton[ARRAY_SIZE];
protected JTextField[] workspaceTF = new JTextField[ARRAY_SIZE];
private List<String> list = new ArrayList<>();
public DynamicSubPanel2() {
nextIndex=-1;
list.add("My first object");
list.add("My second object");
rebuildPanel();
}
private void rebuildPanel() {
relativeLayout = new RelativeLayout();
this.setLayout(relativeLayout);
String thisItem;
String aboveItem=DependencyManager.ROOT_NAME;
String prevItem=DependencyManager.ROOT_NAME;
int linespace= 0;
int boundary = 5;
int gap = 5;
int buttonWidth = 110;
for (String text : list) {
nextIndex++;
actionJB[nextIndex]= new JButton("Edit");
thisItem="editJB"+nextIndex;
actionJB[nextIndex].setActionCommand("Edit");
actionJB[nextIndex].addActionListener(new EditListener(text, nextIndex));
relativeLayout.addConstraint(thisItem, AttributeType.TOP,
new AttributeConstraint(aboveItem, AttributeType.TOP, linespace));
relativeLayout.addConstraint(thisItem, AttributeType.LEFT,
new AttributeConstraint(DependencyManager.ROOT_NAME, AttributeType.LEFT, boundary));
relativeLayout.addConstraint(thisItem, AttributeType.RIGHT,
new AttributeConstraint(thisItem, AttributeType.LEFT, buttonWidth));
this.add(actionJB[nextIndex], thisItem) ;
prevItem=thisItem;
aboveItem=thisItem;
workspaceTF[nextIndex]= new JTextField(text);
workspaceTF[nextIndex].setEditable(false);
thisItem="workspaceTF"+nextIndex;
workspaceTF[nextIndex].setEditable(false);
relativeLayout.addConstraint(thisItem, AttributeType.BOTTOM,
new AttributeConstraint(prevItem, AttributeType.BOTTOM));
relativeLayout.addConstraint(thisItem, AttributeType.LEFT,
new AttributeConstraint(prevItem, AttributeType.RIGHT, gap));
relativeLayout.addConstraint(thisItem, AttributeType.RIGHT,
new AttributeConstraint(DependencyManager.ROOT_NAME, AttributeType.RIGHT, -boundary));
this.add(workspaceTF[nextIndex], thisItem) ;
prevItem=thisItem;
linespace= 30;
}
nextIndex++;
actionJB[nextIndex] = new JButton("Add");
thisItem="addJB"+nextIndex;
actionJB[nextIndex].setActionCommand("Add");
actionJB[nextIndex].addActionListener(new AddListener(nextIndex));
relativeLayout.addConstraint(thisItem, AttributeType.TOP,
new AttributeConstraint(aboveItem, AttributeType.TOP, linespace));
relativeLayout.addConstraint(thisItem, AttributeType.LEFT,
new AttributeConstraint(DependencyManager.ROOT_NAME, AttributeType.LEFT, boundary));
relativeLayout.addConstraint(thisItem, AttributeType.RIGHT,
new AttributeConstraint(thisItem, AttributeType.LEFT, buttonWidth));
this.add(actionJB[nextIndex], thisItem) ;
prevItem=thisItem;
aboveItem=thisItem;
LOGGER.info("{}", list.size());
workspaceTF[nextIndex]= new JTextField(list.size());
thisItem="workspaceTF"+nextIndex;
relativeLayout.addConstraint(thisItem, AttributeType.BOTTOM,
new AttributeConstraint(prevItem, AttributeType.BOTTOM));
relativeLayout.addConstraint(thisItem, AttributeType.LEFT,
new AttributeConstraint(prevItem, AttributeType.RIGHT, gap));
relativeLayout.addConstraint(thisItem, AttributeType.RIGHT,
new AttributeConstraint(DependencyManager.ROOT_NAME, AttributeType.RIGHT, -boundary));
this.add(workspaceTF[nextIndex], thisItem) ;
prevItem=thisItem;
}
public JPanel getPanel() {
return this;
}
class EditListener implements ActionListener {
private String text;
private int tfIndex;
public EditListener(String text, int tfIndex) {
this.text = text;
this.tfIndex = tfIndex;
}
#Override
public void actionPerformed(ActionEvent event) {
if (event.getActionCommand().equals("Edit")) {
EditWorker worker = new EditWorker(tfIndex);
worker.execute();
}
else if (event.getActionCommand().equals("Save")) {
SaveWorker worker = new SaveWorker(text, tfIndex);
worker.execute();
}
}
}
class EditWorker extends SwingWorker {
private int tfIndex;
public EditWorker(int tfIndex) {
this.tfIndex = tfIndex;
}
public Object doInBackground() throws InterruptedException, IOException {
return null;
}
public void done() {
workspaceTF[tfIndex].setBackground(Color.WHITE);
workspaceTF[tfIndex].setEditable(true);
actionJB[tfIndex].setText("Save");
actionJB[tfIndex].setActionCommand("Save");
}
}
class SaveWorker extends SwingWorker {
private String text;
private int tfIndex;
public SaveWorker(String text, int tfIndex) {
this.text = text;
this.tfIndex = tfIndex;
}
public Object doInBackground() throws InterruptedException, IOException {
list.remove(text);
list.add(workspaceTF[tfIndex].getText());
return null;
}
public void done() {
workspaceTF[tfIndex].setEditable(false);
workspaceTF[tfIndex].setBackground(Color.LIGHT_GRAY);
actionJB[tfIndex].setText("Edit");
actionJB[tfIndex].setActionCommand("Edit");
}
}
class AddListener implements ActionListener {
private int tfIndex;
public AddListener(int tfIndex) {
this.tfIndex = tfIndex;
}
#Override
public void actionPerformed(ActionEvent event) {
AddWorker worker = new AddWorker(tfIndex, this);
worker.execute();
}
}
class AddWorker extends SwingWorker {
private int tfIndex;
private boolean success;
private AddListener listener;
public AddWorker(int tfIndex, AddListener listener) {
this.tfIndex = tfIndex;
this.listener = listener;
}
public Object doInBackground() throws InterruptedException, IOException {
list.add(workspaceTF[tfIndex].getText());
return null;
}
public void done() {
rebuildPanel();
getPanel().repaint();
}
}
}