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| public class WizardPanel extends JPanel {
public WizardPanel(JPanel...panels) {
setLayout(new BorderLayout());
JPanel mainPanel = new JPanel();
CardLayout cardLayout = new CardLayout();
mainPanel.setLayout(cardLayout);
add(mainPanel, BorderLayout.CENTER);
for(int index=0; index<panels.length; index++) {
mainPanel.add(panels[index], String.valueOf(index)); // dans un cardlayout, chaque composant à un nom : ici j'utilise juste un index de 0 à nombre d'étapes-1
}
Controller controller = new Controller(panels.length, mainPanel, cardLayout); // le controleur est chargé de gérer les actions sur les boutons
add(createButtonPanel(controller),BorderLayout.SOUTH);
}
private JPanel createButtonPanel(Controller controller) {
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(0, 2));
JButton previousButton = new JButton("Précédent");
JButton nextButton = new JButton("Suivant");
controller.addPreviousButton(previousButton);
controller.addNextButton(nextButton);
controller.setButtonsEnabling();
panel.add(previousButton);
panel.add(nextButton);
return panel;
}
private class Controller implements ActionListener {
private int nbPanels;
private int currentPanelIndex;
private Container container;
private CardLayout cardLayout;
private JButton nextButton;
private JButton previousButton;
public Controller(int nbPanels, Container container, CardLayout cardLayout) {
this.nbPanels=nbPanels; // nombre d'étapes
this.container=container;
this.cardLayout=cardLayout;
currentPanelIndex=0; // étape actuelle (on commence par la première)
}
/**
* active ou pas chacun des boutons en fonction de l'étape active
*/
public void setButtonsEnabling() {
this.previousButton.setEnabled(currentPanelIndex>0);
this.nextButton.setEnabled(currentPanelIndex<nbPanels-1);
}
public void addNextButton(JButton nextButton) {
this.nextButton=nextButton;
this.nextButton.addActionListener(this);
}
public void addPreviousButton(JButton previousButton) {
this.previousButton=previousButton;
this.previousButton.addActionListener(this);
}
@Override
public void actionPerformed(ActionEvent e) {
if ( e.getSource()==nextButton ) {
currentPanelIndex++;
}
else if ( e.getSource()==previousButton ) {
currentPanelIndex--;
}
cardLayout.show(container, String.valueOf(currentPanelIndex));
setButtonsEnabling();
}
}
public static void main(String[] args) {
JFrame exemple = new JFrame("Exemple wizard");
exemple.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// trois étapes, dans trois panels différents
JPanel panel1=createExemplePanel("ECRAN DEBUT");
JPanel panel2=createExemplePanel("ECRAN INTERMEDIAIRE");
JPanel panel3=createExemplePanel("ECRAN FIN");
WizardPanel wizardPanel = new WizardPanel(panel1, panel2, panel3);
exemple.setContentPane(wizardPanel);
exemple.setSize(300, 300);
exemple.setLocationRelativeTo(null);
exemple.setVisible(true);
}
private static JPanel createExemplePanel(String text) {
JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
panel.add(new JLabel(text,JLabel.CENTER),BorderLayout.CENTER);
return panel;
}
} |
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