I have created 2 JLists 'addGroupList' and 'addApkList'. I am adding elements to addGroupList using model.addElement(arrayList1.get(arrayList1.size()-1)); the thing is, I want to update addApkList based on selected value of addGroupList. For this, I'm trying to add event listener so that I can act upon something when list item is selected but the event is not trigerring. What do I do to accomplish this? following is the code I'm using.
model1 = new DefaultListModel();
model2 = new DefaultListModel();
addApkList = new JList(model1);
addGroupList = new JList(model2);
scrollPane1 = new JScrollPane();
scrollPane1.setViewportView(addApkList);
scrollPane2 = new JScrollPane();
scrollPane2.setViewportView(addGroupList);
this way i've defined JList. in following way i've added elements to addGroupList
model1.addElement(arrayList1.get(arrayList1.size()-1));
and in following way I've added listener to it.
addGroupList.addListSelectionListener(new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent lse) {
if (!lse.getValueIsAdjusting()) {
System.out.println("Selection trigerred");
}
}
});
There doesnt seem to happen any change with this code. what mi doing wrong? I've also tried following
model1.addListDataListener(new ListDataListener() {
@Override
public void intervalAdded(ListDataEvent lde) {
System.out.println("ddddddddddd");
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void intervalRemoved(ListDataEvent lde) {
System.out.println("ddddddddddd");
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void contentsChanged(ListDataEvent lde) {
System.out.println("ddddddddddd");
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
});
In following way i've added elements to addGroupList
model1.addElement(arrayList1.get(arrayList1.size()-1));
No you haven't. model1
is the list model for addApkList
not addGroupList
:
addApkList = new JList(model1);
It should be model2.addElement(arrayList1.get(arrayList1.size()-1))
.
In any case I suspect you're expecting for a ListSelectionEvent being fired when you just simply add an item to list model. That won't happen. You need to set the added item as the selected one:
Object item = arrayList1.get(arrayList1.size()-1);
model2.addElement(item);
addGroupList.setSelectedValue(item, true);
Take a look to JList.setSelectedValue(Object anObject, boolean shouldScroll) for further details.
I have created 2 JLists 'addGroupList' and 'addApkList'. I am adding elements to addGroupList using model.addElement(arrayList1.get(arrayList1.size()-1)); the thing is, I want to update addApkList based on selected value of addGroupList. For this, I'm trying to add event listener so that I can act upon something when list item is selected but the event is not trigerring. What do I do to accomplish this? following is the code I'm using.
for example
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
public class Testing extends JFrame {
private static final long serialVersionUID = 1L;
private DefaultListModel listModel = new DefaultListModel();
private DefaultListModel listModelEmpty = new DefaultListModel();
private JList list = new JList(listModel);
private JList listEmpty = new JList(listModelEmpty);
private JPanel panel = new JPanel(new GridLayout(1, 1));
private int currentSelectedRow = 0;
private int xX = 0;
public Testing() {
setLocation(400, 300);
setDefaultCloseOperation(EXIT_ON_CLOSE);
for (int x = 0; x < 9; x++) {
listModel.addElement("" + x);
xX++;
}
JScrollPane sp = new JScrollPane(list);
list.addListSelectionListener(new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent lse) {
if (!lse.getValueIsAdjusting()) {
System.out.println("Selection trigerred");
}
}
});
JScrollPane spEmpty = new JScrollPane(listEmpty);
panel.add(spEmpty);
panel.add(sp);
add(panel, BorderLayout.CENTER);
JButton btn1 = new JButton("Reset Model CastingModel");
add(btn1, BorderLayout.NORTH);
btn1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
//list.clearSelection();
DefaultListModel model = (DefaultListModel) list.getModel();
model.removeAllElements();
for (int x = 0; x < 9; x++) {
model.addElement("" + (x + xX));
xX++;
}
list.setModel(model);
}
});
JButton btn2 = new JButton("Reset Model directly from Model");
add(btn2, BorderLayout.SOUTH);
btn2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
//list.clearSelection();
listModel.removeAllElements();
for (int x = 0; x < 9; x++) {
listModel.addElement("" + (x + xX));
xX++;
}
}
});
pack();
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new Testing().setVisible(true);
}
});
}
}
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