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 null;
		}
		public boolean hasChildren(TreeListDialogField field, Object element) {
			return (element instanceof CPListElement);
		}		
		
		
		public void dialogFieldChanged(DialogField field) {
			sourcePageDialogFieldChanged(field);
		}
	}
	
	protected void sourcePageDoubleClicked(TreeListDialogField field) {
		if (field == fFoldersList) {
			List selection= fFoldersList.getSelectedElements();
			if (canEdit(selection)) {
				editEntry();
			}
		}
	}
	
	
	protected void sourcePageCustomButtonPressed(DialogField field, int index) {
		if (field == fFoldersList) {
			if (index == IDX_ADD) {
				List elementsToAdd= new ArrayList(10);
				if (fCurrJProject.getProject().exists()) {
					CPListElement[] srcentries= openSourceContainerDialog(null);
					if (srcentries != null) {