Cancel a close event

Question

I have an editor in Eclipse. When the user chooses to close it, a dialog shall appear with several options. One of them is "Cancel" and should cancel the close event. How can I do that?

The partial code I have so far:

    ...
    IEditorPart openEditor = page.openEditor(input, CS_STRINGEDITOR_ID);
    openEditor.getEditorSite().getPage()
        .addPartListener(new IPartListener() {
          public void partOpened(IWorkbenchPart part) {}
          public void partDeactivated(IWorkbenchPart part) {}

          public void partClosed(IWorkbenchPart part) {
            Shell sh = new Shell(cv.getViewSite().getShell());
            // My MessageDialog with the options, one being "cancel"
            CloseDialog closeDialog = new CloseDialog(sh);
            closeDialog.open();
            int returnCode = closeDialog.getReturnCode();
            switch (returnCode) {
            case CloseDialog.CANCEL_ID:
              // Abort the close event and keep the editor alive
              break;
            }
          }

Answer 1

This thread points out there is no closing event per se.

Eclipse provides mostly post-activite events, i.e. on IPartListener2, partClosed(*) is a post-closing event.

You can provide your own dialog on close, but it will only be shown if the editor is dirty at the time it is closed. See ISaveablePart2.promptToSaveOnClose()

(as presented in the Prevent that a RCP Editor is closed)

However, note that implementing ISaveablePart2 may lead to many dialogs being opened when you close multiple editors.