diff -r 6e48030cf2db -r 161511838ea6 ui/gtk/toolbar.c
--- a/ui/gtk/toolbar.c	Tue Dec 08 15:19:31 2020 +0100
+++ b/ui/gtk/toolbar.c	Thu Dec 10 13:42:25 2020 +0100
@@ -108,49 +108,58 @@
     ucx_map_cstr_put(toolbar_items, name, item);
 }
 
-void ui_toolitem_toggle_st(char *name, char *stockid, ui_callback f, void *udata) {
-    ui_toolitem_toggle_stgr(name, stockid, f, udata, -1);
-}
-
-void ui_toolitem_toggle_stgr(char *name, char *stockid, ui_callback f, void *udata, ...) {
-    UiStToolItem *item = malloc(sizeof(UiStToolItem));
-    item->item.add_to = (ui_toolbar_add_f)add_toolitem_toggle_st_widget;
-    item->stockid = stockid;
-    item->callback = f;
-    item->userdata = udata;
+void ui_toolitem_toggle(const char *name, const char *label, const char *img, UiInteger *i) {
+    UiToggleToolItem *item = malloc(sizeof(UiToggleToolItem));
+    item->item.add_to = (ui_toolbar_add_f)add_toolitem_toggle_widget;
+    item->label = label;
+    item->image = img;
+    item->stockid = NULL;
     item->groups = NULL;
     item->isimportant = 0;
-    
-    // add groups
-    va_list ap;
-    va_start(ap, udata);
-    int group;
-    while((group = va_arg(ap, int)) != -1) {
-        item->groups = ucx_list_append(item->groups, (void*)(intptr_t)group);
-    }
-    va_end(ap);
+    item->value = i;
+    item->var = NULL;
     
     ucx_map_cstr_put(toolbar_items, name, item);
 }
 
-void ui_toolitem_toggle_imggr(char *name, char *label, char *img, ui_callback f, void *udata, ...) {
-    UiToolItem *item = malloc(sizeof(UiToolItem));
+void ui_toolitem_toggle_st(const char *name, const char *stockid, UiInteger *i) {
+    UiToggleToolItem *item = malloc(sizeof(UiToggleToolItem));
+    item->item.add_to = (ui_toolbar_add_f)add_toolitem_toggle_widget;
+    item->label = NULL;
+    item->image = NULL;
+    item->stockid = stockid;
+    item->groups = NULL;
+    item->isimportant = 0;
+    item->value = i;
+    item->var = NULL;
+    
+    ucx_map_cstr_put(toolbar_items, name, item);
+}
+
+void ui_toolitem_toggle_nv(const char *name, const char *label, const char *img, const char *intvar) {
+    UiToggleToolItem *item = malloc(sizeof(UiToggleToolItem));
     item->item.add_to = (ui_toolbar_add_f)add_toolitem_toggle_widget;
     item->label = label;
     item->image = img;
-    item->callback = f;
-    item->userdata = udata;
+    item->stockid = NULL;
     item->groups = NULL;
     item->isimportant = 0;
+    item->value = NULL;
+    item->var = intvar;
     
-    // add groups
-    va_list ap;
-    va_start(ap, udata);
-    int group;
-    while((group = va_arg(ap, int)) != -1) {
-        item->groups = ucx_list_append(item->groups, (void*)(intptr_t)group);
-    }
-    va_end(ap);
+    ucx_map_cstr_put(toolbar_items, name, item);
+}
+
+void ui_toolitem_toggle_stnv(const char *name, const char *stockid, const char *intvar) {
+    UiToggleToolItem *item = malloc(sizeof(UiToggleToolItem));
+    item->item.add_to = (ui_toolbar_add_f)add_toolitem_toggle_widget;
+    item->label = NULL;
+    item->image = NULL;
+    item->stockid = stockid;
+    item->groups = NULL;
+    item->isimportant = 0;
+    item->value = NULL;
+    item->var = intvar;
     
     ucx_map_cstr_put(toolbar_items, name, item);
 }
@@ -299,33 +308,61 @@
     }
 }
 
-void add_toolitem_toggle_widget(GtkToolbar *tb, UiToolItem *item, UiObject *obj) {
-    GtkToolItem *button = gtk_toggle_tool_button_new();
-    gtk_tool_item_set_homogeneous(button, FALSE);
-    if(item->label) {
-        gtk_tool_button_set_label(GTK_TOOL_BUTTON(button), item->label);
+void add_toolitem_toggle_widget(GtkToolbar *tb, UiToggleToolItem *item, UiObject *obj) {
+    GtkToolItem *button;
+    if(item->stockid) {
+        button = gtk_toggle_tool_button_new_from_stock(item->stockid);
+    } else {
+        button = gtk_toggle_tool_button_new();
+        gtk_tool_item_set_homogeneous(button, FALSE);
+        if(item->label) {
+            gtk_tool_button_set_label(GTK_TOOL_BUTTON(button), item->label);
+        }
+        if(item->image) {
+            GdkPixbuf *pixbuf = ui_get_image(item->image);
+            GtkWidget *image = gtk_image_new_from_pixbuf(pixbuf);
+            gtk_tool_button_set_icon_widget(GTK_TOOL_BUTTON(button), image);
+        }    
     }
-    if(item->image) {
-        GdkPixbuf *pixbuf = ui_get_image(item->image);
-        GtkWidget *image = gtk_image_new_from_pixbuf(pixbuf);
-        gtk_tool_button_set_icon_widget(GTK_TOOL_BUTTON(button), image);
-    }    
     
-    if(item->callback) {
-        UiEventData *event = ucx_mempool_malloc(
-                obj->ctx->mempool,
-                sizeof(UiEventData));
-        event->obj = obj;
-        event->userdata = item->userdata;
-        event->callback = item->callback;
-        
-        g_signal_connect(
-                button,
-                "toggled",
-                G_CALLBACK(ui_button_toggled),
-                event);
+    UiVar *var;
+    if(item->value) {
+        var = malloc(sizeof(UiVar));
+        var->value = item->value;
+        var->type = UI_VAR_SPECIAL;
+        var->from = NULL;
+        var->from_ctx = NULL;
+    } else {
+        var = uic_create_var(obj->ctx, item->var, UI_VAR_INTEGER);
     }
     
+    if(var->value) {
+        UiInteger *i = var->value;
+        i->get = ui_tool_toggle_button_get;
+        i->set = ui_tool_toggle_button_set;
+        i->obj = button;
+        
+        if(i->value != 0) {
+            gtk_toggle_tool_button_set_active(GTK_TOGGLE_TOOL_BUTTON(button), TRUE);
+        }
+    }
+    
+    // register event
+    // the event func will call the UiInteger observer callbacks
+    UiEventData *event = ucx_mempool_malloc(
+            obj->ctx->mempool,
+            sizeof(UiEventData));
+    event->obj = obj;
+    event->userdata = var;
+    event->callback = NULL;
+
+    g_signal_connect(
+            button,
+            "toggled",
+            G_CALLBACK(ui_tool_button_toggled),
+            event);
+    
+    // add item to toolbar
     gtk_toolbar_insert(tb, button, -1);
     
     if(item->groups) {
@@ -333,30 +370,29 @@
     }
 }
 
-void add_toolitem_toggle_st_widget(GtkToolbar *tb, UiStToolItem *item, UiObject *obj) {
-    GtkToolItem *button = gtk_toggle_tool_button_new_from_stock(item->stockid);
-    gtk_tool_item_set_homogeneous(button, FALSE);
+void ui_tool_button_toggled(GtkToggleToolButton *widget, UiEventData *event) {
+    UiEvent e;
+    e.obj = event->obj;
+    e.window = event->obj->window;
+    e.document = event->obj->ctx->document;
+    e.eventdata = NULL;
+    e.intval = gtk_toggle_tool_button_get_active(widget);
+    
+    UiVar *var = event->userdata;
+    UiInteger *i = var->value;
     
-    if(item->callback) {
-        UiEventData *event = ucx_mempool_malloc(
-                obj->ctx->mempool,
-                sizeof(UiEventData));
-        event->obj = obj;
-        event->userdata = item->userdata;
-        event->callback = item->callback;
-        
-        g_signal_connect(
-                button,
-                "toggled",
-                G_CALLBACK(ui_button_toggled),
-                event);
-    }
-    
-    gtk_toolbar_insert(tb, button, -1);
-    
-    if(item->groups) {
-        uic_add_group_widget(obj->ctx, button, item->groups);
-    }
+    ui_notify_evt(i->observers, &e);
+}
+
+int64_t ui_tool_toggle_button_get(UiInteger *integer) {
+    integer->value = gtk_toggle_tool_button_get_active(GTK_TOGGLE_TOOL_BUTTON(integer->obj));
+    return integer->value;
+}
+
+void ui_tool_toggle_button_set(UiInteger *integer, int64_t value) {
+    gboolean s = integer->value != 0 ? TRUE : FALSE;
+    gtk_toggle_tool_button_set_active(GTK_TOGGLE_TOOL_BUTTON(integer->obj), s);
+    integer->value = s;
 }
 
 void add_toolbar_combobox(GtkToolbar *tb, UiToolbarComboBox *cb, UiObject *obj) {