/* removes a subcategory - triggered by categories tab only */
public String btnRemoveSubCat_action() {
NonHumanCategory category = getCurrentlySelectedCategory();
if (category != null) {
if (category.removeSubCategory(_sb.getNhResourcesSubcategoryChoice())) {
_orgDataSet.updateNonHumanCategory(category);
_sb.setNhResourcesSubcategoryChoice("None");
} else _msgPanel.error("Failed to remove subcategory.");
}
return null;
}
/* checks if currently selected subcat may be removed. pre: in 'edit' mode */
private boolean subCatUnremovable() {
String subCatStr = _sb.getNhResourcesSubcategoryChoice();
return (subCatStr == null) || subCatStr.equals("None");
}