diff --git a/src/configuration.rs b/src/configuration.rs
index c1289de..a2ce9cd 100644
--- a/src/configuration.rs
+++ b/src/configuration.rs
@@ -120,7 +120,7 @@ impl ConfigPrivate for Config {
                     ops.insert(p.type_name().into());
                 }
             }
-            if o.object_type != ObjectType::Object {
+            if o.object_type.is_model() {
                 ops.insert("quintptr".into());
             }
         }
@@ -129,7 +129,7 @@ impl ConfigPrivate for Config {
     fn has_list_or_tree(&self) -> bool {
         self.objects
             .values()
-            .any(|o| o.object_type == ObjectType::List || o.object_type == ObjectType::Tree)
+            .any(|o| o.object_type.is_model())
     }
 }
 
@@ -193,9 +193,35 @@ pub struct Rust {
     pub interface_module: String,
 }
 
+impl ObjectType {
+    pub fn is_object(&self) -> bool {
+        match self {
+            ObjectType::Object | ObjectType::Widget => true,
+            _ => false,
+        }
+    }
+
+    pub fn is_model(&self) -> bool {!self.is_object()}
+
+    pub fn is_list(&self) -> bool {
+        match self {
+            ObjectType::List => true,
+            _ => false
+        }
+    }
+
+    pub fn is_tree(&self) -> bool {
+        match self {
+            ObjectType::Tree => true,
+            _ => false
+        }
+    }
+}
+
 #[derive(Deserialize, Clone, Copy, PartialEq)]
 pub enum ObjectType {
     Object,
+    Widget,
     List,
     Tree,
 }
diff --git a/src/cpp.rs b/src/cpp.rs
index f174261..3ca2bd6 100644
--- a/src/cpp.rs
+++ b/src/cpp.rs
@@ -25,17 +25,24 @@ fn write_property(name: &str) -> String {
 }
 
 fn base_type(o: &Object) -> (&str, bool) {
-    let model = o.object_type != ObjectType::Object;
-
     let name = if o.base_class != "" {
         &o.base_class
-    } else if o.object_type == ObjectType::Object {
-        "QAbstractItemModel"
     } else {
-        "QObject"
+        match o.object_type {
+            ObjectType::Widget => "QWidget",
+            ObjectType::Object => "QObject",
+            _ => "QAbstractItemModel",
+        }
     };
 
-    (name, model)
+    (name, o.object_type.is_model())
+}
+
+fn parent_type(o: &Object) -> &str {
+    match o.object_type {
+        ObjectType::Widget => "QWidget",
+        _ => "QObject",
+    }
 }
 
 fn model_is_writable(o: &Object) -> bool {
@@ -80,7 +87,7 @@ fn write_header_item_model(h: &mut Vec<u8>, o: &Object) -> Result<()> {
         } else {
             r.clone()
         };
-        if o.object_type == ObjectType::List {
+        if o.object_type.is_list() {
             writeln!(h, "    Q_INVOKABLE {} {}(int row) const;", r, name)?;
             if ip.write {
                 writeln!(
@@ -175,11 +182,12 @@ private:"
     }
     writeln!(
         h,
-        "    explicit {}(bool owned, QObject *parent);
+        "    explicit {}(bool owned, {1} *parent);
 public:
-    explicit {0}(QObject *parent = nullptr);
+    explicit {0}({1} *parent = nullptr);
     ~{0}();",
-        o.name
+        o.name,
+        parent_type(o)
     )?;
     for (name, p) in &o.properties {
         if p.is_object() {
@@ -361,7 +369,7 @@ fn connect(w: &mut Vec<u8>, d: &str, o: &Object, conf: &Config) -> Result<()> {
             connect(w, &format!("{}->m_{}", d, name), object, conf)?;
         }
     }
-    if o.object_type != ObjectType::Object {
+    if o.object_type.is_model() {
         writeln!(
             w,
             "    connect({}, &{1}::newDataReady, {0}, [this](const QModelIndex& i) {{
@@ -377,10 +385,11 @@ fn write_cpp_object(w: &mut Vec<u8>, o: &Object, conf: &Config) -> Result<()> {
     let lcname = snake_case(&o.name);
     writeln!(
         w,
-        "{}::{0}(bool /*owned*/, QObject *parent):
-    {}(parent),",
+        "{1}::{0}(bool /*owned*/, {2} *parent):
+    {1}(parent),",
         o.name,
-        base_type(o).0
+        base_type(o).0,
+        parent_type(o)
     )?;
     initialize_members_zero(w, o)?;
     writeln!(
@@ -389,17 +398,18 @@ fn write_cpp_object(w: &mut Vec<u8>, o: &Object, conf: &Config) -> Result<()> {
     m_ownsPrivate(false)
 {{"
     )?;
-    if o.object_type != ObjectType::Object {
+    if o.object_type.is_model() {
         writeln!(w, "    initHeaderData();")?;
     }
     writeln!(
         w,
         "}}
 
-{}::{0}(QObject *parent):
-    {}(parent),",
+{1}::{0}({2} *parent):
+    {1}(parent),",
         o.name,
-        base_type(o).0
+        base_type(o).0,
+        parent_type(o)
     )?;
     initialize_members_zero(w, o)?;
     write!(w, "    m_d({}_new(this", lcname)?;
@@ -412,7 +422,7 @@ fn write_cpp_object(w: &mut Vec<u8>, o: &Object, conf: &Config) -> Result<()> {
     )?;
     initialize_members(w, "", o, conf)?;
     connect(w, "this", o, conf)?;
-    if o.object_type != ObjectType::Object {
+    if o.object_type.is_model() {
         writeln!(w, "    initHeaderData();")?;
     }
     writeln!(
@@ -426,7 +436,7 @@ fn write_cpp_object(w: &mut Vec<u8>, o: &Object, conf: &Config) -> Result<()> {
 }}",
         o.name, lcname
     )?;
-    if o.object_type != ObjectType::Object {
+    if o.object_type.is_model() {
         writeln!(w, "void {}::initHeaderData() {{", o.name)?;
         for col in 0..o.column_count() {
             for (name, ip) in &o.item_properties {
@@ -632,7 +642,7 @@ fn write_model_getter_setter(
 
     // getter
     let mut r = property_type(ip);
-    if o.object_type == ObjectType::List {
+    if o.object_type.is_list() {
         idx = ", row";
         writeln!(w, "{} {}::{}(int row) const\n{{", r, o.name, name)?;
     } else {
@@ -692,7 +702,7 @@ fn write_model_getter_setter(
     if r == "QVariant" || ip.is_complex() {
         r = format!("const {}&", r);
     }
-    if o.object_type == ObjectType::List {
+    if o.object_type.is_list() {
         idx = ", row";
         writeln!(
             w,
@@ -763,7 +773,7 @@ fn write_model_getter_setter(
     if ip.optional {
         writeln!(w, "    }}")?;
     }
-    if o.object_type == ObjectType::List {
+    if o.object_type.is_list() {
         writeln!(
             w,
             "    if (set) {{
@@ -790,7 +800,7 @@ fn write_model_getter_setter(
 
 fn write_cpp_model(w: &mut Vec<u8>, o: &Object) -> Result<()> {
     let lcname = snake_case(&o.name);
-    let (index_decl, index) = if o.object_type == ObjectType::Tree {
+    let (index_decl, index) = if o.object_type.is_tree() {
         (", quintptr", ", index.internalId()")
     } else {
         (", int", ", index.row()")
@@ -840,7 +850,7 @@ fn write_cpp_model(w: &mut Vec<u8>, o: &Object) -> Result<()> {
         lcname,
         o.name
     )?;
-    if o.object_type == ObjectType::List {
+    if o.object_type.is_list() {
         writeln!(
             w,
             "
@@ -1060,7 +1070,7 @@ Qt::ItemFlags {0}::flags(const QModelIndex &i) const
                 writeln!(w, "        case Qt::{}:", role_name(role))?;
             }
             writeln!(w, "        case Qt::UserRole + {}:", i)?;
-            let ii = if o.object_type == ObjectType::List {
+            let ii = if o.object_type.is_list() {
                 ".row()"
             } else {
                 ""
@@ -1155,7 +1165,7 @@ bool {0}::setHeaderData(int section, Qt::Orientation orientation, const QVariant
                     write!(w, "role == Qt::{} || ", role_name(role))?;
                 }
                 writeln!(w, "role == Qt::UserRole + {}) {{", i)?;
-                let ii = if o.object_type == ObjectType::List {
+                let ii = if o.object_type.is_list() {
                     ".row()"
                 } else {
                     ""
@@ -1207,7 +1217,7 @@ fn constructor_args_decl(w: &mut Vec<u8>, o: &Object, conf: &Config) -> Result<(
             write!(w, ", void (*)({}*)", o.name)?;
         }
     }
-    if o.object_type == ObjectType::List {
+    if o.object_type.is_list() {
         write!(
             w,
             ",
@@ -1226,7 +1236,7 @@ fn constructor_args_decl(w: &mut Vec<u8>, o: &Object, conf: &Config) -> Result<(
             o.name
         )?;
     }
-    if o.object_type == ObjectType::Tree {
+    if o.object_type.is_tree() {
         write!(
             w,
             ",
@@ -1262,7 +1272,7 @@ fn constructor_args(w: &mut Vec<u8>, prefix: &str, o: &Object, conf: &Config) ->
             write!(w, ",\n        {}", changed_f(o, name))?;
         }
     }
-    if o.object_type == ObjectType::List {
+    if o.object_type.is_list() {
         writeln!(
             w,
             ",
@@ -1308,7 +1318,7 @@ fn constructor_args(w: &mut Vec<u8>, prefix: &str, o: &Object, conf: &Config) ->
             o.column_count() - 1
         )?;
     }
-    if o.object_type == ObjectType::Tree {
+    if o.object_type.is_tree() {
         writeln!(
             w,
             ",
@@ -1408,6 +1418,7 @@ pub fn write_header(conf: &Config) -> Result<()> {
     }
     writeln!(h, "
 #include <QtCore/QObject>
+#include <QtCore/QWidget>
 #include <QtCore/QAbstractItemModel>")?;
 
     for name in conf.objects.keys() {
@@ -1506,7 +1517,7 @@ namespace {{",
     writeln!(w, "}}")?;
 
     for o in conf.objects.values() {
-        if o.object_type != ObjectType::Object {
+        if o.object_type.is_model() {
             write_cpp_model(&mut w, o)?;
         }
         writeln!(w, "extern \"C\" {{")?;
diff --git a/src/rust.rs b/src/rust.rs
index e752540..170aead 100644
--- a/src/rust.rs
+++ b/src/rust.rs
@@ -83,14 +83,14 @@ fn r_constructor_args_decl(r: &mut Vec<u8>, name: &str, o: &Object, conf: &Confi
             )?;
         }
     }
-    if o.object_type == ObjectType::List {
+    if o.object_type.is_list() {
         write!(
             r,
             ",\n    {}_new_data_ready: fn(*mut {}QObject)",
             snake_case(name),
             o.name
         )?;
-    } else if o.object_type == ObjectType::Tree {
+    } else if o.object_type.is_tree() {
         write!(
             r,
             ",\n    {}_new_data_ready: fn(*mut {}QObject, index: COption<usize>)",
@@ -98,13 +98,13 @@ fn r_constructor_args_decl(r: &mut Vec<u8>, name: &str, o: &Object, conf: &Confi
             o.name
         )?;
     }
-    if o.object_type != ObjectType::Object {
-        let index_decl = if o.object_type == ObjectType::Tree {
+    if o.object_type.is_model() {
+        let index_decl = if o.object_type.is_tree() {
             " index: COption<usize>,"
         } else {
             ""
         };
-        let dest_decl = if o.object_type == ObjectType::Tree {
+        let dest_decl = if o.object_type.is_tree() {
             " index: COption<usize>,"
         } else {
             ""
@@ -156,7 +156,7 @@ fn r_constructor_args(r: &mut Vec<u8>, name: &str, o: &Object, conf: &Config) ->
             snake_case(name)
         )?;
     }
-    if o.object_type != ObjectType::Object {
+    if o.object_type.is_model() {
         writeln!(
             r,
             "        new_data_ready: {}_new_data_ready,",
@@ -164,8 +164,8 @@ fn r_constructor_args(r: &mut Vec<u8>, name: &str, o: &Object, conf: &Config) ->
         )?;
     }
     let mut model = String::new();
-    if o.object_type != ObjectType::Object {
-        let type_ = if o.object_type == ObjectType::List {
+    if o.object_type.is_model() {
+        let type_ = if o.object_type.is_list() {
             "List"
         } else {
             "Tree"
@@ -311,9 +311,9 @@ pub struct {0}Emitter {{
             o.name
         )?;
     }
-    if o.object_type == ObjectType::List {
+    if o.object_type.is_list() {
         writeln!(r, "    new_data_ready: fn(*mut {}QObject),", o.name)?;
-    } else if o.object_type == ObjectType::Tree {
+    } else if o.object_type.is_tree() {
         writeln!(
             r,
             "    new_data_ready: fn(*mut {}QObject, index: COption<usize>),",
@@ -348,7 +348,7 @@ impl {0}Emitter {{
             snake_case(name),
         )?;
     }
-    if o.object_type != ObjectType::Object {
+    if o.object_type.is_model() {
         writeln!(r, "            new_data_ready: self.new_data_ready,")?;
     }
     writeln!(
@@ -378,7 +378,7 @@ impl {0}Emitter {{
         )?;
     }
 
-    if o.object_type == ObjectType::List {
+    if o.object_type.is_list() {
         writeln!(
             r,
             "    pub fn new_data_ready(&mut self) {{
@@ -388,7 +388,7 @@ impl {0}Emitter {{
         }}
     }}"
         )?;
-    } else if o.object_type == ObjectType::Tree {
+    } else if o.object_type.is_tree() {
         writeln!(
             r,
             "    pub fn new_data_ready(&mut self, item: Option<usize>) {{
@@ -401,8 +401,8 @@ impl {0}Emitter {{
     }
 
     let mut model_struct = String::new();
-    if o.object_type != ObjectType::Object {
-        let type_ = if o.object_type == ObjectType::List {
+    if o.object_type.is_model() {
+        let type_ = if o.object_type.is_list() {
             "List"
         } else {
             "Tree"
@@ -414,7 +414,7 @@ impl {0}Emitter {{
         let mut dest = "";
         let mut dest_decl = "";
         let mut dest_c_decl = "";
-        if o.object_type == ObjectType::Tree {
+        if o.object_type.is_tree() {
             index_decl = " index: Option<usize>,";
             index_c_decl = " index: COption<usize>,";
             index = " index.into(),";
@@ -550,7 +550,7 @@ pub trait {}Trait {{
             f.return_type.rust_type()
         )?;
     }
-    if o.object_type == ObjectType::List {
+    if o.object_type.is_list() {
         writeln!(
             r,
             "    fn row_count(&self) -> usize;
@@ -562,7 +562,7 @@ pub trait {}Trait {{
     fn fetch_more(&mut self) {{}}
     fn sort(&mut self, _: u8, _: SortOrder) {{}}"
         )?;
-    } else if o.object_type == ObjectType::Tree {
+    } else if o.object_type.is_tree() {
         writeln!(
             r,
             "    fn row_count(&self, _: Option<usize>) -> usize;
@@ -577,7 +577,7 @@ pub trait {}Trait {{
     fn row(&self, index: usize) -> usize;"
         )?;
     }
-    if o.object_type != ObjectType::Object {
+    if o.object_type.is_model() {
         for (name, ip) in &o.item_properties {
             let name = snake_case(name);
             writeln!(
@@ -851,7 +851,7 @@ pub unsafe extern \"C\" fn {}_set_none(ptr: *mut {}) {{
     for f in &o.functions {
         write_function(r, f, &lcname, o)?;
     }
-    if o.object_type == ObjectType::List {
+    if o.object_type.is_list() {
         writeln!(
             r,
             "
@@ -885,7 +885,7 @@ pub unsafe extern \"C\" fn {1}_sort(
 }}",
             o.name, lcname
         )?;
-    } else if o.object_type == ObjectType::Tree {
+    } else if o.object_type.is_tree() {
         writeln!(
             r,
             "
@@ -952,8 +952,8 @@ pub unsafe extern \"C\" fn {1}_row(ptr: *const {0}, index: usize) -> c_int {{
             o.name, lcname
         )?;
     }
-    if o.object_type != ObjectType::Object {
-        let (index_decl, index) = if o.object_type == ObjectType::Tree {
+    if o.object_type.is_model() {
+        let (index_decl, index) = if o.object_type.is_tree() {
             (", index: usize", "index")
         } else {
             (", row: c_int", "to_usize(row)")
@@ -1114,7 +1114,7 @@ fn write_rust_types(conf: &Config, r: &mut Vec<u8>) -> Result<()> {
     let mut has_list_or_tree = false;
 
     for o in conf.objects.values() {
-        has_list_or_tree |= o.object_type != ObjectType::Object;
+        has_list_or_tree |= o.object_type.is_model();
         for p in o.properties.values() {
             has_option |= p.optional;
             has_string |= p.property_type == Type::Simple(SimpleType::QString);
@@ -1288,7 +1288,7 @@ use {}{}::*;",
 }
 
 fn write_rust_implementation_object(r: &mut Vec<u8>, o: &Object) -> Result<()> {
-    if o.object_type != ObjectType::Object {
+    if o.object_type.is_model() {
         writeln!(r, "#[derive(Default, Clone)]")?;
         writeln!(r, "struct {}Item {{", o.name)?;
         for (name, ip) in &o.item_properties {
@@ -1308,10 +1308,10 @@ fn write_rust_implementation_object(r: &mut Vec<u8>, o: &Object) -> Result<()> {
     }
     let mut model_struct = String::new();
     writeln!(r, "pub struct {} {{\n    emit: {0}Emitter,", o.name)?;
-    if o.object_type == ObjectType::List {
+    if o.object_type.is_list() {
         model_struct = format!(", model: {}List", o.name);
         writeln!(r, "    model: {}List,", o.name)?;
-    } else if o.object_type == ObjectType::Tree {
+    } else if o.object_type.is_tree() {
         model_struct = format!(", model: {}Tree", o.name);
         writeln!(r, "    model: {}Tree,", o.name)?;
     }
@@ -1319,7 +1319,7 @@ fn write_rust_implementation_object(r: &mut Vec<u8>, o: &Object) -> Result<()> {
         let lc = snake_case(name);
         writeln!(r, "    {}: {},", lc, rust_type(p))?;
     }
-    if o.object_type != ObjectType::Object {
+    if o.object_type.is_model() {
         writeln!(r, "    list: Vec<{}Item>,", o.name)?;
     }
     writeln!(r, "}}\n")?;
@@ -1336,7 +1336,7 @@ fn write_rust_implementation_object(r: &mut Vec<u8>, o: &Object) -> Result<()> {
             emit,",
         o.name, model_struct
     )?;
-    if o.object_type != ObjectType::Object {
+    if o.object_type.is_model() {
         writeln!(r, "            model,")?;
         writeln!(r, "            list: Vec::new(),")?;
     }
@@ -1415,12 +1415,12 @@ fn write_rust_implementation_object(r: &mut Vec<u8>, o: &Object) -> Result<()> {
             )?;
         }
     }
-    if o.object_type == ObjectType::List {
+    if o.object_type.is_list() {
         writeln!(
             r,
             "    fn row_count(&self) -> usize {{\n        self.list.len()\n    }}"
         )?;
-    } else if o.object_type == ObjectType::Tree {
+    } else if o.object_type.is_tree() {
         writeln!(
             r,
             "    fn row_count(&self, item: Option<usize>) -> usize {{
@@ -1444,7 +1444,7 @@ fn write_rust_implementation_object(r: &mut Vec<u8>, o: &Object) -> Result<()> {
     }}"
         )?;
     }
-    if o.object_type != ObjectType::Object {
+    if o.object_type.is_model() {
         for (name, ip) in &o.item_properties {
             let lc = snake_case(name);
             writeln!(