diff -r 29d98cff4f56 -r 853685152c1d application/main.c
--- a/application/main.c	Sat Nov 11 12:22:16 2017 +0100
+++ b/application/main.c	Sun Nov 12 12:03:50 2017 +0100
@@ -39,6 +39,8 @@
     UiString *t2;
     UiString *t3;
     UiInteger *i;
+    UiDouble *d;
+    UiRange *r;
 } Document;
 
 Document *d1;
@@ -82,6 +84,8 @@
     doc->t3 = ui_string_new(ctx, "t3");
     
     doc->i = ui_int_new(ctx, "int");
+    doc->d = ui_double_new(ctx, "d");
+    doc->r = ui_range_new(ctx, "r");
     return doc;
 }
 
@@ -97,6 +101,11 @@
     printf("observ: %s\n", (char*)data);
 }
 
+void doublechanged(UiEvent *event, void *data) {
+    UiDouble *d = event->eventdata;
+    printf("d: %f\n", (float)d->get(d));
+}
+
 void application_startup(UiEvent *event, void *data) {
     //Document *doc = create_doc();
     d1 = create_doc();
@@ -115,6 +124,12 @@
     d1->t1->observers = ui_add_observer(d1->t1->observers, observ, "t1");
     d1->text->observers = ui_add_observer(d1->text->observers, observ, "text");
     
+    //ui_spinner_setrange(ui_spinnerf_nv(obj, 1, 0, "d"), 0, 1000);
+    ui_spinnerr_nv(obj, "r");
+    d1->r->setrange(d1->r, 0, 10);
+    d1->r->setextent(d1->r, 1);
+    d1->d->observers = ui_add_observer(d1->d->observers, doublechanged, NULL);
+    
     ui_button(obj, "Switch Document", action_newdoc, NULL);
     
     ui_show(obj);