AttilaB
asked on
Unable to change or refresh JFrame from the ActionPerformed() methods
Something simple-looking but very annoying here:
I would like to update the JFrame with changing text on a JButton and enable / disable a JList, on this form, per clicks of menu items captured with ActionListener ActionPerformed, on the fly, at runtime. Well, no matter what I do the update of JFrame will not happen. What is happening here? Why is it not updating like this?
What do I need to change so that the update happens, when I select each checkbox menu item?
This is what doesn't work:
And this is the full code for the class, if you want to try to run it:
Thank you for your help.
I would like to update the JFrame with changing text on a JButton and enable / disable a JList, on this form, per clicks of menu items captured with ActionListener ActionPerformed, on the fly, at runtime. Well, no matter what I do the update of JFrame will not happen. What is happening here? Why is it not updating like this?
What do I need to change so that the update happens, when I select each checkbox menu item?
This is what doesn't work:
private void jMenuBSTesting_ActionPerformed(ActionEvent e){
System.out.println("Boundary Scan Testing Clicked");
this.jbtnOpenProject.setText("Open Project");
this.jlstProjectList.setEnabled(true);
this.validate();
this.repaint();
}
private void jMenuTroubleshooting_ActionPerformed(ActionEvent e){
System.out.println("Troubleshoot PCB Clicked");
this.jbtnOpenProject.setText("Continue");
this.jlstProjectList.setEnabled(false);
this.validate();
this.repaint();
}And this is the full code for the class, if you want to try to run it:
import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
public class SelectProject extends JFrame {
// Variables declaration
private JLabel jlblSelectTest;
private JScrollPane scrollPane1;
private DefaultListModel model;
private JList jlstProjectList;
private JButton jbtnOpenProject;
// End of variables declaration
private String selectionLine = "";
private static String[] commandLineArguments;
private String combinedCommandLineArgumentsString = "";
private ArrayList<String> listOfAllProjectsInFolder = new ArrayList<String>();
// Menu related objects:
private JMenuBar menuBar1 = new JMenuBar();
// Top level menu Load for Troublehooting or testing, testing
// is default:
private JMenu mnuTopLevel_OperationMode = new JMenu();
private JCheckBoxMenuItem jMenuBSTesting;
private JCheckBoxMenuItem jMenuTroubleshooting;
// Making menus mutually exclusive:
private ButtonGroup troubleshootOptionsGroup = new ButtonGroup();
// Default: cascon is installed:
private boolean casconInstalled = true;
public SelectProject() {
super("BST Program ITC version 1.1 - Select Project" );
initComponents();
try {
// Set the look and feel for the current OS (Windows) Scheme
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
initComponents();
} catch (Exception e) {
e.printStackTrace();
}
this.setSize(388,396);
this.setResizable(false);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setJMenuBar(menuBar1);
jMenuBSTesting = new JCheckBoxMenuItem();
jMenuTroubleshooting = new JCheckBoxMenuItem();
jMenuBSTesting.setText("Boundary Scan Testing");
jMenuBSTesting.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
jMenuBSTesting_ActionPerformed(e);
}
});
jMenuTroubleshooting.setText("Troubleshoot PCB");
jMenuTroubleshooting.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
jMenuTroubleshooting_ActionPerformed(e);
}
});
mnuTopLevel_OperationMode.setText("Operation Mode");
mnuTopLevel_OperationMode.add(jMenuBSTesting);
mnuTopLevel_OperationMode.add(jMenuTroubleshooting);
troubleshootOptionsGroup = new ButtonGroup();
troubleshootOptionsGroup.add(jMenuBSTesting);
troubleshootOptionsGroup.add(jMenuTroubleshooting);
jMenuBSTesting.setSelected(true);
menuBar1.add(mnuTopLevel_OperationMode);
// Make the Project Selector JFrame visible if no command line
// argument:
if(commandLineArguments.length == 0)
this.setVisible(true);
else{ // Project Selector JFrame invisible, command line argument used:
combinedCommandLineArgumentsString = combineArguments(commandLineArguments);
if(listOfAllProjectsInFolderContainsString(combinedCommandLineArgumentsString,listOfAllProjectsInFolder)){
this.setVisible(false);
System.out.println("Open project from command line: " + combinedCommandLineArgumentsString);
}
else{
JOptionPane.showMessageDialog(null, "Parameter is not contained in list of projects. Please make a selection of test project to run.", " Unknown Project Name", JOptionPane.WARNING_MESSAGE);
this.setVisible(true);
}
}
}
private void initComponents() {
// Component initialization
jlblSelectTest = new JLabel();
scrollPane1 = new JScrollPane();
model = new DefaultListModel();
jlstProjectList = new JList(model);
jbtnOpenProject = new JButton();
//======== this ========
Container contentPane = getContentPane();
contentPane.setLayout(null);
//---- jlblSelectTest ----
jlblSelectTest.setText("Select Test Project to Open:");
jlblSelectTest.setFont(new Font("Tahoma", Font.BOLD, 14));
jlblSelectTest.setHorizontalAlignment(SwingConstants.CENTER);
contentPane.add(jlblSelectTest);
jlblSelectTest.setBounds(50, 10, 260, 25);
//======== scrollPane1 ========
{
scrollPane1.setViewportView(jlstProjectList);
}
contentPane.add(scrollPane1);
scrollPane1.setBounds(20, 45, 340, 245);
//---- jbtnOpenProject ----
if (casconInstalled){
jbtnOpenProject.setText("Open Project");
jlstProjectList.setEnabled(true);
}
else{
jbtnOpenProject.setText("Continue");
jlstProjectList.setEnabled(false);
}
jbtnOpenProject.setFont(new Font("Tahoma", Font.BOLD, 12));
jbtnOpenProject.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
jbtnOpenProject_ActionPerformed(e);
}
});
contentPane.add(jbtnOpenProject);
jbtnOpenProject.setBounds(125, 305, 120, jbtnOpenProject.getPreferredSize().height);
{ // compute preferred size
Dimension preferredSize = new Dimension();
for(int i = 0; i < contentPane.getComponentCount(); i++) {
Rectangle bounds = contentPane.getComponent(i).getBounds();
preferredSize.width = Math.max(bounds.x + bounds.width, preferredSize.width);
preferredSize.height = Math.max(bounds.y + bounds.height, preferredSize.height);
}
Insets insets = contentPane.getInsets();
preferredSize.width += insets.right;
preferredSize.height += insets.bottom;
contentPane.setMinimumSize(preferredSize);
contentPane.setPreferredSize(preferredSize);
}
pack();
setLocationRelativeTo(getOwner());
// Add a list selection listener anonymous instance to JList control:
// (implementing valueChanged() method)
ListSelectionListener lListener = new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
if (e.getValueIsAdjusting() == false) // it will prevent double firing when valueChanged() is called
{
JList list = (JList) e.getSource();
if (!(list.isSelectionEmpty())) {
selectionLine = (String) list.getSelectedValue();
System.out.println("Selected: " + selectionLine);
}
}
}
};
jlstProjectList.addListSelectionListener(lListener);
String dirName = "c:\\";
if (!(dirName.equals("")))
listFoldersInFolder(dirName);
// End of component initialization
}
public static void main(String[] args) {
// Save the command line arguments in a static String array:
commandLineArguments = args;
// The static utility method invokeLater(Runnable) is intended to execute a new runnable
// thread from a Swing application without disturbing the normal sequence of event dispatching
// from the GUI.
SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
// Set the look and feel for the current OS (Windows) Scheme and
// all subsequent jFrames will also have the same look and feel
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SelectProject selectProject = new SelectProject();
selectProject.setLocationRelativeTo(null);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
private void jbtnOpenProject_ActionPerformed(ActionEvent e) {
System.out.println("Open project Button Clicked");
if (selectionLine.equals("")){
JOptionPane.showMessageDialog(null, " Select project to load ", "No Selection Made", JOptionPane.WARNING_MESSAGE);
}
else{
System.out.println("Open project: " + selectionLine);
}
}
// This will create a list of foldernames and add it
// to the LList in the JFrame:
public void listFoldersInFolder(String pathName)
{
model.clear();
File [] paths;
File file=new File(pathName);
if(file.isDirectory()){
paths = file.listFiles();
for (int i=0; i<paths.length; i++)
{
if (paths[i].isDirectory()){
System.out.println(paths[i].getPath());
listOfAllProjectsInFolder.add(paths[i].getPath());
String pathNameString = paths[i].getName();
// Folder 'CasconMainScreen_Executable' contains the
// executable program. Don't show a folder with that name:
if(!(pathNameString.equals("CasconMainScreen_Executable")))
model.addElement(paths[i].getName());
}
}
}
}
// Method for combining command line arguments into a single string:
private String combineArguments(String [] commandLineArguments){
String combinedString = "";
for (int i =0; i< commandLineArguments.length; i++){
combinedString = combinedString + " " + commandLineArguments[i];
}
return combinedString.trim(); //Take off heading " " (space) character
}
// This method will determine if inputString is contained in a substring
// of ArrayList<String> strings.
private boolean listOfAllProjectsInFolderContainsString(String inputString, ArrayList<String> listOfStrings){
boolean stringContained = false;
Iterator it = listOfStrings.iterator();
while(it.hasNext()){
String lineString = (String) it.next();
System.out.println(lineString);
if (lineString.contains(inputString)){
stringContained = true;
break;
}
}
return stringContained;
}
// THIS IS WHERE THE PROBLEM IS, THE ACTIONPERFORMED METHODS FOR MENUS:
// *******************************************************************
private void jMenuBSTesting_ActionPerformed(ActionEvent e){
System.out.println("Boundary Scan Testing Clicked");
this.jbtnOpenProject.setText("Open Project");
this.jlstProjectList.setEnabled(true);
this.validate();
this.repaint();
}
private void jMenuTroubleshooting_ActionPerformed(ActionEvent e){
System.out.println("Troubleshoot PCB Clicked");
this.jbtnOpenProject.setText("Continue");
this.jlstProjectList.setEnabled(false);
this.validate();
this.repaint();
}
}Thank you for your help.
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER