i want to refresh a JList when i push a button in another JFrame.
So i have a JFrame GuiBoss that manages employees (add,delete,update).When i press the button add, another Jframe opens, in wich i create a new employee.
//Open the "add_form" where i give details about a new employee.
private void btnAddActionPerformed(java.awt.event.ActionEvent evt) {
GuiBoss gb = new GuiBoss(contrb,boss);
Add_form af = new Add_form(gb,contrb,boss);
af.setVisible(true);
}
//refresh the list with the new employee added.
public void refresh(Employee e){
System.out.println("I reach this point!");
//if i print e.getName() it works, printing the right name that i give in the "add_form"
listModel.addElement(e);
//listModel.clear(); //don't work either.
}
My problem is that when i submit the details about the new employee i call the function refresh(Employee e) from the GuiBoss frame , the message ("I reach this point!") shows up on the console, the size of the listModel changes, but the list it doesen't refresh.
Also i must say that i set the model properly for the list.
//take data from form and call refresh(Employee e) from the main frame("GuiBoss")
private void btnAddActionPerformed(java.awt.event.ActionEvent evt) {
//String Id = txtID.getText();
String UserName = txtName.getText();
txtHour.setVisible(false);
boolean b = false;
if(rbtnYes.isSelected() == true){
b = true;
}
if(rbtnNo.isSelected() == true){
b = false;
}
if(rbtnYes.isSelected()==false && rbtnNo.isSelected() == false){
System.out.println("Select the presence!");
}
else{
txtOra.setVisible(true);
String Hour = txtHour.getText();
e = new Employee(UserName,b,Hour,boss); //boss i get from main frame when i start this add new employee form
contrb.addEmployee(e);
gb.refresh(e); //gb is of type GuiBoss were i have the function that does
// the refresh
}
}
Please let me know if u have any ideeas.Thanks.
Instead of popping up another frame, why not use a modal JDialog to collect the information about the new employee. When the dialog is closed, you can then extract the details from the dialog and refresh the list from within the current frame.
This prevents the need to expose portions of your API unnecessarily.
Check out How to use Dialogs for details.
Updated
Assuming you've set the model correctly, then your code should work...as per this example...
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListModel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestList03 {
public static void main(String[] args) {
new TestList03();
}
public TestList03() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private DefaultListModel model;
public TestPane() {
setLayout(new BorderLayout());
model = new DefaultListModel();
JList list = new JList(model);
add(new JScrollPane(list));
JButton btn = new JButton("Add");
btn.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
model.addElement("New Element");
}
});
add(btn, BorderLayout.SOUTH);
}
}
}
That would suggest that there is something else wrong that you're not showing us...
Updated with possible fix for reference issues
This basically demonstrates passing a reference of the main panel to a sub factory that is responsible for actually adding the value back into the main panel. Normally I'd use a interface of some kind instead of exposing the entire panel to simply provide access to a single method, but this was a quick example.
It uses both a normal implements and inner class as ActionListener to demonstrate the two most common means for passing a reference of "self" to another class.
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListModel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestList03 {
public static void main(String[] args) {
new TestList03();
}
public TestList03() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel implements ActionListener {
private DefaultListModel model;
public TestPane() {
setLayout(new BorderLayout());
model = new DefaultListModel();
JList list = new JList(model);
add(new JScrollPane(list));
JPanel buttons = new JPanel(new FlowLayout(FlowLayout.CENTER));
JButton btn1 = new JButton("Add 1");
btn1.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
new Factory(TestPane.this, "Added by Button 1");
}
});
buttons.add(btn1);
JButton btn2 = new JButton("Add 2");
btn2.addActionListener(this);
buttons.add(btn2);
add(buttons, BorderLayout.SOUTH);
}
public void addItem(String text) {
model.addElement(text);
}
#Override
public void actionPerformed(ActionEvent e) {
new Factory(TestPane.this, "Added by Button 2");
}
}
public class Factory {
public Factory(TestPane testPane, String text) {
testPane.addItem(text);
}
}
}
Related
In a JTabbedPane, I associated a custom-made Data object to each added tab. I also have a corresponding Metadata object that shows up in another panel when the tab is selected. The problem I have now is when a tab is closed, the metadata panel shows the metadata of the Data object in the tab that just gets closed. Ideally, I want the panel to show the metadata for the in-focus tab that the user sees. However, the act of closing a tab means the “selected tab” is the tab being closed, so tabpane.getSelectedIndex() would not work. How can I get the tab that is in focus after closing a tab? Thank you in advance!
Devil is in the detail, which you provided none.
I did a quick test and discovered that, ChangeListener is called before ContainerListener, which is a real pain, but, it was always reporting the correct index.
So, what you need to do is marry the two together, so that, both will update the meta data pane when they are called.
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ContainerEvent;
import java.awt.event.ContainerListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
JTabbedPane tabbedPane = new JTabbedPane();
tabbedPane.addTab("One", new TabPane(tabbedPane));
tabbedPane.addTab("Two", new TabPane(tabbedPane));
tabbedPane.addTab("Three", new TabPane(tabbedPane));
tabbedPane.addTab("Four", new TabPane(tabbedPane));
tabbedPane.addContainerListener(new ContainerListener() {
#Override
public void componentAdded(ContainerEvent e) {
}
#Override
public void componentRemoved(ContainerEvent e) {
System.out.println("Removed " + e.getChild());
}
});
tabbedPane.addChangeListener(new ChangeListener() {
#Override
public void stateChanged(ChangeEvent e) {
System.out.println(tabbedPane.getSelectedIndex());
}
});
JFrame frame = new JFrame();
frame.add(tabbedPane);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TabPane extends JPanel {
private JTabbedPane parent;
public TabPane(JTabbedPane parent) {
this.parent = parent;
setLayout(new GridBagLayout());
JButton btn = new JButton("Close");
add(btn);
btn.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
parent.remove(TabPane.this);
}
});
}
}
}
I wanna create a simple java application, and I have some problems.
This is my main class:
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.BorderLayout;
import java.awt.Component;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class MainWindow {
private JFrame frame;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
MainWindow window = new MainWindow();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public MainWindow() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setBounds(100, 100, 450, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
frame.getContentPane().add(panel, BorderLayout.CENTER);
JButton btnNewButton = new JButton("First B");
panel.add(btnNewButton);
btnNewButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
SecWindow SW = new SecWindow();
//-----
}
});
}
}
Secound class:
import javax.swing.JButton;
import javax.swing.JPanel;
public class SecWindow {
public SecWindow() {
SecPanel();
}
public void SecPanel() {
JPanel panel2 = new JPanel();
JButton btnNewButton_2 = new JButton("Sec B");
panel2.add(btnNewButton_2);
}
}
How can I do this: when I press the "First B" I wanna delete the first panel and create a new one class SecWindow().
How can I do this: when I press the "First B" I wanna delete the first panel and create a new one class SecWindow().
You should be using a CardLayout. The CardLayout will allow you to swap panels in the frame.
Read the section from the Swing tutorial on How to Use CardLayout for more information and working examples.
The example uses a combo box to swap the panels so you just need to move that code to the ActionListener of your button.
try{
secWindow secondWindow = new secWindow();
secondWindow.frame.setVisible(true);
window.frame.setVisible(false);
} catch (Exception e) {
e.printStackTrace();
This will hide first window and show second one.
You can not completely "delete" object that has main method in it. your app will start and end in main method.
instead you can make new class and transfer main method over there
I wanted to create a fairly simple GUI program that switches between panels depending on buttons the user clicked. I searched around and came up with CardLayout being the best suggestion.
Basically in the examples of CardLayout, you create a "card" (a JPanel) and then add each component, like buttons, etc... and switch between the cards.
What I want to create is an object that is a "card" with all the components set up already, in a separate class, and just create an instance of that in the main program. I am a beginner and do not know the best design practices, so I didn't want to create my own class that extended JPanel, which I am pretty sure is terrible design.
You do it just like you would if you had create an instance of JPanel and add the components directly to it.
You need to ensure that the custom class extends from something JComponent or JPanel (preferably) and add them to the container like any other component, for example...
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JToggleButton;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestCard {
public static void main(String[] args) {
new TestCard();
}
public TestCard() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
final CardLayout cardLayout = new CardLayout();
final JPanel cardPane = new JPanel(cardLayout);
cardPane.add(new Card01(), "Card01");
cardPane.add(new Card02(), "Card02");
JToggleButton btnCard01 = new JToggleButton("#1");
JToggleButton btnCard02 = new JToggleButton("#2");
ButtonGroup bg = new ButtonGroup();
bg.add(btnCard01);
bg.add(btnCard02);
JPanel buttons = new JPanel();
buttons.add(btnCard01);
buttons.add(btnCard02);
btnCard01.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
cardLayout.show(cardPane, "Card01");
}
});
btnCard02.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
cardLayout.show(cardPane, "Card02");
}
});
btnCard01.setSelected(true);
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(cardPane);
frame.add(buttons, BorderLayout.SOUTH);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class Card01 extends JPanel {
public Card01() {
setLayout(new GridBagLayout());
add(new JLabel("#1"));
}
#Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
}
public class Card02 extends JPanel {
public Card02() {
setLayout(new GridBagLayout());
add(new JLabel("#2"));
}
#Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
}
}
I want to remove a certain botton using MouseListener from a matrix of bottons and add a JLabel in the empty, so I use:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public MyClass(){
object = new Object();
bottons = new JButton[5][5];
labels = new JLabel[5][5];
myPanel = new JPanel();
myPanel.setLayout(new GridLayout(5,5));
click =false;
for(int i = 0 ; i<5 ; i++){
for(int j = 0; j<5 ; j++){
myPanel.add(bottons[i][j] = new JButton());
}
}
}
public void mouseReleased(MouseEvent e)
if(click){
remove(bottons[object.getx][object.gety]);//this is correct? or is there another way?
myJPanel.add(labels[object.getx][object.gety] = new JLabel("1"));
click = false;
}
But nothing happen, haha
Thanks for the help.
When you add/remove components from a visible GUI the basic code is:
panel.remove(...);
panel.add(...);
panel.revalidate();
panel.repaint();
Also "MyJPanel" is not a standard Java variable name. Variable names in Java should NOT start with an upper case character. You didn't do that with your other variables, so be consistent!
Given the fact the i and j have no context in the mouse listener method, no, it's probably not a good idea.
The next question is, what is the mouse listener attached to? If it's attached to the button, then it might be better to use a ActionListener.
In either case you could use the source of the event...
Object source = e.getSource();
if (source instanceof JButton) {
JButton btn = (JButton)source;
//find index of button in array...
remove(btn);
//...
revalidate();
}
Updated
A simpler solution might be to simply dump the buttons and labels into a List, for example...
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class ButtonUpdates {
public static void main(String[] args) {
new ButtonUpdates();
}
public ButtonUpdates() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel implements ActionListener {
private List<JButton> btns = new ArrayList<>(25);
private List<JLabel> lbls = new ArrayList<>(25);
public TestPane() {
setLayout(new GridLayout(5,5));
for (int index = 0; index < 25; index++) {
JButton btn = new JButton(Integer.toString(index));
JLabel lbl = new JLabel(Integer.toString(index));
btns.add(btn);
lbls.add(lbl);
btn.addActionListener(this);
add(btn);
}
}
#Override
public void actionPerformed(ActionEvent e) {
Object source = e.getSource();
if (source instanceof JButton) {
JButton btn = (JButton) source;
int index = btns.indexOf(source);
JLabel lbl = lbls.get(index);
index = getComponentZOrder(btn);
remove(btn);
add(lbl, index);
revalidate();
}
}
}
}
This makes looking up what has being actioned and what needs to be replaced easier.
When switching components, you also need to know where the component needs to be added, for this I simply used getComponentZOrder before I removed the JButton
I am making a java application that includes a JWindow. I want to be able to track the mouse without the user having to click the window after going to another window.
Your question is little vague on why you want to continue processing the mouse once it's left the JWindow...but
You have two (basic) choices when it comes to mointoring the mouse outside of your application, you can use a JNI/JNA solution or you can poll MouseInfo.
The following demonstrates the latter, using MouseInfo and a javax.swing.Timer to update a label...
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.MouseInfo;
import java.awt.PointerInfo;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class MouseWindow {
public static void main(String[] args) {
new MouseWindow();
}
public MouseWindow() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private JLabel label;
public TestPane() {
setLayout(new BorderLayout());
label = new JLabel();
label.setFont(label.getFont().deriveFont(48f));
label.setHorizontalAlignment(JLabel.CENTER);
label.setVerticalAlignment(JLabel.CENTER);
add(label);
updateMouseInfo();
Timer timer = new Timer(250, new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
updateMouseInfo();
}
});
timer.start();
}
protected void updateMouseInfo() {
PointerInfo pi = MouseInfo.getPointerInfo();
label.setText(pi.getLocation().x + "x" + pi.getLocation().y);
}
}
}
Updated
You may also find Window#setAlwaysOnTop of help to keep the window ontop of the others, if support for the platform