Changing JPanel with button click.

Question

Hi, I have a class call TOC(Table of Content) which contains all the buttons. One class call MainController. All buttons I add an actionListener which the MainController class will handle. Anothe class which is the main one which contain a JPanel.
When I click on the button in TOC class, it will go through the MainController class and display the respective JPanel associate with the button.
Now the problem is how do I change the JPanel in the main class with a click on the button in TOC class?
Please advise. Thanks in advance.

Answer 1

Not sure what you mean exactly. However,
Assuming that your view class is a JPanel, when you create your controller,
ViewPanel view = new ViewPanel();
MainController controller = new MainController(viewPanel);
In MainController track a reference to your viewPanel. Also in viewPanel have a method called setCurrentPanel(JPanel panel). then int he controller's action listener
public void actionPerformed(ActionEvent ev) {
JPanel pnl = (JPanel) panelMap.get(ev.getSource().getName());
viewPanel.setCurrentPanel(pnl);
I am assuming you have a way of mapping each button to the panel it will use, which is what is in the panelMap. The viewPanel can have a CardPanel layout for the panels it displays and its setCurrentPanel, can bring to front/oradd the specified panel.
Good luck, hope this helps :-)