Bug 30630 nested source folders: unclear error message
20030129 create a jproject, a source folder s1 and a nested in it source folder s2 delete s1 open the 'new' wizard and try creating a source folder s1 the error message is very long and compilicated while it should be a simple warning saying 'You have a folder s1 - I will turn it into a source folder fo you' (and then it could automagically add excelusion filter so that s2 is still a source folder)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/SourceContainerWorkbookPage.java
return false;
	}	
	
	private void sourcePageDialogFieldChanged(DialogField field) {
		if (fCurrJProject == null) {
			
			return;
		}
		
		if (field == fUseFolderOutputs) {
			if (!fUseFolderOutputs.isSelected()) {
				int nFolders= fFoldersList.getSize();
				for (int i= 0; i < nFolders; i++) {
					CPListElement cpe= (CPListElement) fFoldersList.getElement(i);
					cpe.setAttribute(CPListElement.OUTPUT, null);
				}
			}
			fFoldersList.refresh();
		} else if (field == fFoldersList) {
			updateClasspathList();
		}
	}	
	
		
	private void updateClasspathList() {
		List cpelements= fClassPathList.getElements();
		List srcelements= fFoldersList.getElements();
		boolean changeDone= false;
		CPListElement lastSourceFolder= null;