diff --git a/common-rust/src/implementation.rs b/common-rust/src/implementation.rs
index 478a7c4..d0c3156 100644
--- a/common-rust/src/implementation.rs
+++ b/common-rust/src/implementation.rs
@@ -1,6 +1,9 @@
 use interface::*;
 use types::*;
 use libc::{c_int};
+use std::fs::read_dir;
+use std::path::PathBuf;
+use std::ffi::OsString;
 
 pub struct Hello {
     emit: HelloEmitter,
@@ -28,30 +31,91 @@ impl Drop for Hello {
     }
 }
 
+struct DirEntry {
+    name: OsString,
+    parent: usize,
+    children: Option<Vec<usize>>
+}
+
 pub struct RItemModel {
     emit: RItemModelEmitter,
-//    string: String
+    entries: Vec<DirEntry>
+}
+
+impl RItemModel {
+    fn get(&mut self, index: &QModelIndex) -> usize {
+        let p = if index.is_valid() {
+            let row = index.row() as usize;
+            self.entries[index.id() as usize].children.as_ref().unwrap()[row]
+        } else {
+            1
+        };
+        if self.entries[p].children.is_none() {
+            self.read_dir(p);
+        }
+        p
+    }
+    fn get_path(&self, id: usize) -> PathBuf {
+        let mut pos = id;
+        let mut e = Vec::new();
+        while pos > 0 {
+            e.push(pos);
+            pos = self.entries[pos].parent;
+        }
+        let mut path = PathBuf::new();
+        for i in e.into_iter().rev() {
+            path.push(&self.entries[i].name);
+        }
+        path
+    }
+    fn read_dir(&mut self, id: usize) {
+        let mut v = Vec::new();
+        if let Ok(it) = read_dir(self.get_path(id)) {
+            for i in it.filter_map(|v|v.ok()) {
+                let de = DirEntry {
+                    name: i.file_name(),
+                    parent: id,
+                    children: None
+                };
+                v.push(self.entries.len());
+                self.entries.push(de);
+            }
+        }
+        self.entries[id].children = Some(v);
+    }
 }
 
 impl RItemModelTrait for RItemModel {
     fn create(emit: RItemModelEmitter) -> Self {
+        let none = DirEntry { name: OsString::new(), parent: 0, children: None };
+        let root = DirEntry { name: OsString::from("/"), parent: 0, children: None };
         RItemModel {
-            emit: emit
+            emit: emit,
+            entries: vec![none, root]
         }
     }
-    fn column_count(&self, parent: QModelIndex) -> c_int {
-        if parent.is_valid() { 0 } else { 2 }
+    fn column_count(&mut self, parent: QModelIndex) -> c_int {
+        1
     }
-    fn row_count(&self, parent: QModelIndex) -> c_int {
-        if parent.is_valid() { 0 } else { 2 }
+    fn row_count(&mut self, parent: QModelIndex) -> c_int {
+        let i = self.get(&parent);
+        self.entries[i].children.as_ref().unwrap().len() as i32
     }
-    fn index(&self, row: i32, column: i32, parent: QModelIndex) -> QModelIndex {
-        QModelIndex::flat(row, column)
+    fn index(&mut self, row: i32, column: i32, parent: QModelIndex) -> QModelIndex {
+        QModelIndex::create(row, column, self.get(&parent))
     }
     fn parent(&self, index: QModelIndex) -> QModelIndex {
-        QModelIndex::invalid()
+        if !index.is_valid() || index.id() == 1 {
+            return QModelIndex::invalid();
+        }
+        let parentid = self.entries[index.id()].parent;
+        let ref e = self.entries[parentid];
+        let mut i = e.children.as_ref().unwrap().iter();
+        let row = i.position(|v|*v==index.id()).unwrap() as i32;
+        QModelIndex::create(row, 0, e.parent)
     }
-    fn data<'a>(&'a self, index: QModelIndex, role: c_int) -> Variant<'a> {
-        Variant::from("hello")
+    fn data<'a>(&'a mut self, index: QModelIndex, role: c_int) -> Variant<'a> {
+        let i = self.get(&index);
+        return Variant::from(self.entries[i].name.to_string_lossy().to_string());
     }
 }
diff --git a/common-rust/src/interface.rs b/common-rust/src/interface.rs
index fc4351a..971fbd7 100644
--- a/common-rust/src/interface.rs
+++ b/common-rust/src/interface.rs
@@ -65,11 +65,11 @@ impl RItemModelEmitter {
 
 pub trait RItemModelTrait {
     fn create(emit: RItemModelEmitter) -> Self;
-    fn column_count(&self, parent: QModelIndex) -> c_int;
-    fn row_count(&self, parent: QModelIndex) -> c_int;
-    fn index(&self, row: c_int, column: c_int, parent: QModelIndex) -> QModelIndex;
+    fn column_count(&mut self, parent: QModelIndex) -> c_int;
+    fn row_count(&mut self, parent: QModelIndex) -> c_int;
+    fn index(&mut self, row: c_int, column: c_int, parent: QModelIndex) -> QModelIndex;
     fn parent(&self, index: QModelIndex) -> QModelIndex;
-    fn data<'a>(&'a self, index: QModelIndex, role: c_int) -> Variant<'a>;
+    fn data<'a>(&'a mut self, index: QModelIndex, role: c_int) -> Variant<'a>;
 }
 
 #[no_mangle]
@@ -88,20 +88,20 @@ pub extern fn ritemmodel_free(ptr: *mut RItemModel) {
 }
 
 #[no_mangle]
-pub extern fn ritemmodel_column_count(ptr: *const RItemModel, parent: QModelIndex) -> i32 {
-    let ritemmodel = unsafe { &*ptr };
+pub extern fn ritemmodel_column_count(ptr: *mut RItemModel, parent: QModelIndex) -> i32 {
+    let ritemmodel = unsafe { &mut *ptr };
     ritemmodel.column_count(parent)
 }
 
 #[no_mangle]
-pub extern fn ritemmodel_row_count(ptr: *const RItemModel, parent: QModelIndex) -> i32 {
-    let ritemmodel = unsafe { &*ptr };
+pub extern fn ritemmodel_row_count(ptr: *mut RItemModel, parent: QModelIndex) -> i32 {
+    let ritemmodel = unsafe { &mut *ptr };
     ritemmodel.row_count(parent)
 }
 
 #[no_mangle]
-pub extern fn ritemmodel_index(ptr: *const RItemModel, row: i32, column: i32, parent: QModelIndex) -> QModelIndex {
-    let ritemmodel = unsafe { &*ptr };
+pub extern fn ritemmodel_index(ptr: *mut RItemModel, row: i32, column: i32, parent: QModelIndex) -> QModelIndex {
+    let ritemmodel = unsafe { &mut *ptr };
     ritemmodel.index(row, column, parent)
 }
 
@@ -112,8 +112,8 @@ pub extern fn ritemmodel_parent(ptr: *const RItemModel, index: QModelIndex) -> Q
 }
 
 #[no_mangle]
-pub extern fn ritemmodel_data(ptr: *const RItemModel, index: QModelIndex, role: c_int, d: *mut c_void, set: fn (*mut c_void, &QVariant)) {
-    let ritemmodel = unsafe { &*ptr };
+pub extern fn ritemmodel_data(ptr: *mut RItemModel, index: QModelIndex, role: c_int, d: *mut c_void, set: fn (*mut c_void, &QVariant)) {
+    let ritemmodel = unsafe { &mut *ptr };
     let data = ritemmodel.data(index, role);
     set(d, &QVariant::from(&data));
 }
diff --git a/common-rust/src/types.rs b/common-rust/src/types.rs
index 231faa8..8bb24bd 100644
--- a/common-rust/src/types.rs
+++ b/common-rust/src/types.rs
@@ -21,7 +21,7 @@ pub enum Variant<'a> {
     None,
     Bool(bool),
     String(String),
-    str(&'a str)
+    Str(&'a str)
 }
 
 impl<'a> From<bool> for Variant<'a> {
@@ -38,7 +38,7 @@ impl<'a> From<String> for Variant<'a> {
 
 impl<'a> From<&'a str> for Variant<'a> {
     fn from(value: &'a str) -> Variant {
-        Variant::str(value)
+        Variant::Str(value)
     }
 }
 
@@ -87,7 +87,7 @@ impl<'a> From<&'a Variant<'a>> for QVariant<'a> {
                 type_: VariantType::String as c_uint,
                 phantom: PhantomData
             },
-            &Variant::str(ref v) => QVariant {
+            &Variant::Str(ref v) => QVariant {
                 data: v.as_ptr(),
                 len: v.len() as c_int,
                 type_: VariantType::String as c_uint,
@@ -112,6 +112,13 @@ impl QModelIndex {
             internal_id: 0
         }
     }
+    pub fn create(row: c_int, column: c_int, id: usize) -> QModelIndex {
+        QModelIndex {
+            row: row,
+            column: column,
+            internal_id: id
+        }
+    }
     pub fn flat(row: c_int, column: c_int) -> QModelIndex {
         QModelIndex {
             row: row,
@@ -122,4 +129,13 @@ impl QModelIndex {
     pub fn is_valid(&self) -> bool {
         self.internal_id != 0 && self.row >= 0 && self.column >= 0
     }
+    pub fn row(&self) -> c_int {
+        self.row
+    }
+    pub fn column(&self) -> c_int {
+        self.column
+    }
+    pub fn id(&self) -> usize {
+        self.internal_id
+    }
 }