How to get a Listener in Eclipse FormPage

I am adding 3 pages inside an editor through Eclipse's FormPage. Now on selecting each page I want a listener to get fired. I tried to implement IPageListener in each page class, but none of them responded me. How to get the listener while selecting any page in eclipse FormPage?

I have made a FormEditor class,

public class SimpleFormEditor extends FormEditor

Then I added addPage inside it,

addPage(new ApplicationFormPage(this));

Now in this ApplicationFormPage, I implemented IPageListener,

public class ApplicationFormPage extends FormPage implements IPageListener{

Actually my 开发者_运维问答plan is to get the listener as soon as we click on this page tab.

When your form page is instantiated, you need to add it to something in order to get notified of page changes. In MultiPageEditorPart they use org.eclipse.jface.dialogs.IPageChangedListener.

formEditor.addPageChangedListener(page);