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| import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class test4 extends JPanel implements ListSelectionListener {
int compteur = 0;
private DefaultListModel trip;
private JList list;
private JButton addButton;
private JButton changeButton;
private JButton removeButton;
private static final String[] flightCompanyStrings = {"Air France", "Lufthansa", "US Airways"};
private static final String[] trainCompanyStrings = {"Amtrak", "SNCF", "Tshoo railways"};
private static final String flightString = "Flight";
private static final String trainString = "Train";
private static final String addString = "Add";
private static final String changeString = "Change";
private static final String removeString = "Remove";
private static final String companyString = "Company: ";
private JComboBox companyBox;
private JRadioButton flightRadioButton;
private JRadioButton trainRadioButton;
public test4() {
super(new BorderLayout());
trip = new DefaultListModel();
//Create the list and put it in a scroll pane.
list = new JList(trip);
list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
//list.setSelectedIndex(-1);
list.addListSelectionListener(this);
list.setVisibleRowCount(5);
list.setCellRenderer(new MyCellRenderer());
JScrollPane listScrollPane = new JScrollPane(list);
JPanel listActions = new JPanel();
listActions.add(getActions(), BorderLayout.CENTER);
listActions.add(listScrollPane, BorderLayout.NORTH);
add(listActions, BorderLayout.CENTER);
}
private JPanel getActions() {
JPanel actions = new JPanel(new BorderLayout());
actions.add(getChoice(), BorderLayout.WEST);
actions.add(getFields(), BorderLayout.CENTER);
actions.add(getButtons(), BorderLayout.EAST);
return actions;
}
private JPanel getChoice() {
JPanel choice = new JPanel();
choice.setLayout(new BoxLayout(choice, BoxLayout.Y_AXIS));
flightRadioButton = new JRadioButton (flightString);
trainRadioButton = new JRadioButton (trainString);
flightRadioButton.addActionListener(new FlightActionListener());
trainRadioButton.addActionListener(new TrainActionListener());
ButtonGroup group = new ButtonGroup();
group.add(flightRadioButton);
group.add(trainRadioButton);
choice.add(flightRadioButton);
choice.add(trainRadioButton);
return choice;
}
class FlightActionListener implements ActionListener {
public void actionPerformed(ActionEvent arg0) {
compteur++; System.out.println(compteur + "entree actionperformed bouton flight");
companyBox.removeAllItems();
for (String company:flightCompanyStrings)
companyBox.addItem(company);
compteur++; System.out.println(compteur + "sortie actionperformed bouton flight");
}
}
class TrainActionListener implements ActionListener {
public void actionPerformed(ActionEvent arg0) {
compteur++; System.out.println(compteur + "entree actionperformed bouton train");
companyBox.removeAllItems();
for (String company:trainCompanyStrings)
companyBox.addItem(company);
compteur++; System.out.println(compteur + "sortie actionperformed bouton train");
}
}
private JPanel getFields() {
JPanel fields = new JPanel ();
fields.add(getCompany());
return fields;
}
private JPanel getCompany() {
JPanel company = new JPanel(new FlowLayout());
company.add(new JLabel(companyString));
companyBox = new JComboBox();
company.add(companyBox);
return company;
}
private JPanel getButtons() {
JPanel buttons = new JPanel();
addButton = new JButton(addString);
removeButton = new JButton(removeString);
changeButton = new JButton(changeString);
removeButton.addActionListener(new RemoveListener ());
changeButton.addActionListener(new ChangeListener());
addButton.addActionListener(new AddListener());
buttons.setLayout(new BoxLayout(buttons, BoxLayout.Y_AXIS));
buttons.add(removeButton);
buttons.add(changeButton);
buttons.add(addButton);
removeButton.setEnabled(false);
changeButton.setEnabled(false);
return buttons;
}
class RemoveListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
//This method can be called only if
//there's a valid selection
int index = list.getSelectedIndex();
trip.remove(index);
int size = trip.getSize();
if (size == 0) { //Nothing's left, disable removing
removeButton.setEnabled(false);
} else { //Select an index.
if (index == trip.getSize()) {
//removed item in last position
index--;
}
list.setSelectedIndex(index);
list.ensureIndexIsVisible(index);
}
}
}
class ChangeListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
//This method can be called only if
//there's a valid selection
int index=list.getSelectedIndex();
if (flightRadioButton.isSelected())
trip.setElementAt("Flight" + (String) companyBox.getSelectedItem(), index);
if (trainRadioButton.isSelected())
trip.setElementAt("Train" + (String) companyBox.getSelectedItem(), index);
list.setModel(trip);
list.setSelectedIndex(index);
list.ensureIndexIsVisible(index);
}
}
class AddListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
int index = list.getSelectedIndex(); //get selected index
if (index == -1) { //no selection, so insert at beginning
index = 0;
} else { //add after the selected item
index++;
}
if (flightRadioButton.isSelected())
trip.insertElementAt("Flight" + (String) companyBox.getSelectedItem(), index);
if (trainRadioButton.isSelected())
trip.insertElementAt("Train" + (String) companyBox.getSelectedItem(), index);
if (!(flightRadioButton.isSelected() || trainRadioButton.isSelected()))
JOptionPane.showMessageDialog(null,"Select one radio button between Flight, Train and Car.");
//Select the new segment and make it visible.
list.setSelectedIndex(index);
list.ensureIndexIsVisible(index);
}
}
private void fillFields(int index) {
compteur++; System.out.println(compteur + "entree fillFields");
String segment = (String) trip.get(index);
char first = segment.charAt(0);
if (first=='F') {
flightRadioButton.setVisible(false);
flightRadioButton.doClick();
flightRadioButton.setVisible(true);
}
if (first=='T') {
trainRadioButton.setVisible(false);
trainRadioButton.doClick();
trainRadioButton.setVisible(true);
}
compteur++; System.out.println(compteur + "sortie fillFields");
}
class MyCellRenderer extends JLabel implements ListCellRenderer {
public Component getListCellRendererComponent(final JList list, final Object value, final int index, final boolean isSelected, final boolean cellHasFocus) {
compteur++; System.out.println(compteur + "entree getListCellRendererComponent");
setText((String)value);
if (isSelected) {
setBackground(list.getSelectionBackground());
setForeground(list.getSelectionForeground());
fillFields(index);
} else {
setBackground(list.getBackground());
setForeground(list.getForeground());
}
setEnabled(list.isEnabled());
setFont(list.getFont());
setOpaque(true);
compteur++; System.out.println(compteur + "sortie getListCellRendererComponent");
return this;
}
}
public void valueChanged(ListSelectionEvent e) {
compteur++; System.out.println(compteur + "entree valueChanged");
if (e.getValueIsAdjusting() == false) {
if (list.getSelectedIndex() == -1) {
//No selection, disable fire button.
removeButton.setEnabled(false);
changeButton.setEnabled(false);
} else {
//Selection, enable the fire button.
removeButton.setEnabled(true);
changeButton.setEnabled(true);
}
}
compteur++; System.out.println(compteur + "sortie valueChanged");
}
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("TripTracker");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
JComponent newContentPane = new test4();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
} |
[debutant]getListCellRendererComponent appelé sans raison
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