-#include "psppire-dict.h"
-#include <data/format.h>
-#include <data/dictionary.h>
-#include <data/missing-values.h>
-#include <data/value-labels.h>
-#include <data/variable.h>
+#include "data/dictionary.h"
+#include "data/missing-values.h"
+#include "data/value-labels.h"
+#include "data/variable.h"
+#include "libpspp/i18n.h"
+#include "libpspp/message.h"
+#include "ui/gui/helper.h"
+#include "ui/gui/psppire-marshal.h"
+#include "ui/gui/psppire-var-ptr.h"
+
+enum {
+ BACKEND_CHANGED,
+
+ VARIABLE_CHANGED,
+ VARIABLE_RESIZED,
+ VARIABLE_INSERTED,
+ VARIABLE_DELETED,
+ VARIABLE_DISPLAY_WIDTH_CHANGED,
+
+ WEIGHT_CHANGED,
+ FILTER_CHANGED,
+ SPLIT_CHANGED,
+ n_SIGNALS
+};