diff --git a/Cargo.lock b/Cargo.lock
index 96f1014..dc88854 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -959,8 +959,7 @@ dependencies = [
 [[package]]
 name = "const-field-offset"
 version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6304465f16f463cddc572b737c3df93576edd3a6b53f057bd8beeb29f4ef8dfd"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "const-field-offset-macro",
  "field-offset",
@@ -969,8 +968,7 @@ dependencies = [
 [[package]]
 name = "const-field-offset-macro"
 version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57aaaad9185d3bcb3afe63549d8ba60b2fb0ea8dc2da83f62dd56805edf56fd1"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1329,6 +1327,8 @@ dependencies = [
 name = "czkawka_slint"
 version = "6.1.0"
 dependencies = [
+ "chrono",
+ "czkawka_core",
  "rand",
  "slint",
  "slint-build",
@@ -1569,12 +1569,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "dunce"
-version = "1.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56ce8c6da7551ec6c462cbaf3bfbc75131ebbfa1c944aeaa9dab51ca1c5f0c3b"
-
 [[package]]
 name = "dwrote"
 version = "0.11.0"
@@ -2656,9 +2650,8 @@ dependencies = [
 
 [[package]]
 name = "i-slint-backend-linuxkms"
-version = "1.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0e321d0f8d12509ec2ed5b5aba4996922606686ac3d86d70ba126cba1b4e4563"
+version = "1.3.0"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "calloop 0.11.0",
  "drm",
@@ -2676,9 +2669,8 @@ dependencies = [
 
 [[package]]
 name = "i-slint-backend-qt"
-version = "1.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f1ce3687c329341842f79c31c95d7bcf49b6fda7fd19b09e0b5d7fb33b9d6b2"
+version = "1.3.0"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "const-field-offset",
  "cpp",
@@ -2696,22 +2688,21 @@ dependencies = [
 
 [[package]]
 name = "i-slint-backend-selector"
-version = "1.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7382cc01e9c9ef607debe1e4af7e1c6af78720a258fd18d8e32761b8593c5db"
+version = "1.3.0"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "cfg-if",
  "i-slint-backend-linuxkms",
  "i-slint-backend-qt",
  "i-slint-backend-winit",
+ "i-slint-common",
  "i-slint-core",
 ]
 
 [[package]]
 name = "i-slint-backend-winit"
-version = "1.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8c0f3f01e2c678d24b81914a38e53d3b660a0ef13831acb59c71bd7c95ed0cb"
+version = "1.3.0"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "accesskit",
  "accesskit_winit",
@@ -2748,9 +2739,8 @@ dependencies = [
 
 [[package]]
 name = "i-slint-common"
-version = "1.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7daf484e68bf27e06b7501767c6e66063c0f85948e57a6de679b53d2d9d2044"
+version = "1.3.0"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "cfg-if",
  "derive_more",
@@ -2760,16 +2750,14 @@ dependencies = [
 
 [[package]]
 name = "i-slint-compiler"
-version = "1.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b99172cc43ca17a78e96e3f8f13699d9fc1c00474d2d87bc57c0f7e816c4a48"
+version = "1.3.0"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "by_address",
  "codemap",
  "codemap-diagnostic",
  "css-color-parser2",
  "derive_more",
- "dunce",
  "fontdue",
  "i-slint-common",
  "image",
@@ -2791,9 +2779,8 @@ dependencies = [
 
 [[package]]
 name = "i-slint-core"
-version = "1.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b62e590bb3d6009447a52760e9343c25a3bf7a8a7b0ad7ab5a77c5324fcaa957"
+version = "1.3.0"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "auto_enums",
  "bytemuck",
@@ -2835,9 +2822,8 @@ dependencies = [
 
 [[package]]
 name = "i-slint-core-macros"
-version = "1.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62a416f1e9fc42c2bf1f171e5be38a8155850fcd390fce300869bcc9d6c9c117"
+version = "1.3.0"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "quote",
  "syn 2.0.38",
@@ -2845,9 +2831,8 @@ dependencies = [
 
 [[package]]
 name = "i-slint-renderer-femtovg"
-version = "1.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e99a941fca00b96a7756d56e4bc5e2876283f34c693eabc73585c0b91ab84f0"
+version = "1.3.0"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "cfg-if",
  "const-field-offset",
@@ -2879,9 +2864,8 @@ dependencies = [
 
 [[package]]
 name = "i-slint-renderer-skia"
-version = "1.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f617268cfee53e1fa3fcab8f6ab2775deacfce74057386c4ad39ef2647f8db6"
+version = "1.3.0"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "cfg-if",
  "cfg_aliases",
@@ -3389,11 +3373,9 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "54a0adf8d8607a73a5b74cbe4132f57cb349e4bf860103cd089461bbcbc9907e"
 dependencies = [
- "cc",
  "errno",
  "libseat-sys",
  "log",
- "pkg-config",
 ]
 
 [[package]]
@@ -5062,9 +5044,8 @@ dependencies = [
 
 [[package]]
 name = "slint"
-version = "1.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9a6f76430dde7dc57d374c37aa3103532813cc275a94b515b5907e91dd19334"
+version = "1.3.0"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "const-field-offset",
  "i-slint-backend-selector",
@@ -5079,21 +5060,19 @@ dependencies = [
 
 [[package]]
 name = "slint-build"
-version = "1.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c6edc7309a89f14c685086544ea3dbd7668ccdeb03d774f06879f38237e55815"
+version = "1.3.0"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "i-slint-compiler",
  "spin_on",
  "thiserror",
- "toml_edit 0.19.15",
+ "toml_edit 0.20.2",
 ]
 
 [[package]]
 name = "slint-macros"
-version = "1.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33f96e5ea0574ac69b773b159d43124f7a329107cf60c11516e63d38c2d8c89c"
+version = "1.3.0"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "i-slint-compiler",
  "proc-macro2",
@@ -6226,8 +6205,7 @@ dependencies = [
 [[package]]
 name = "vtable"
 version = "0.1.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f4c7506238561777a1861d3dc3c0001877c475187e7bc4392ea87ebf631fd9c"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "const-field-offset",
  "portable-atomic",
@@ -6238,8 +6216,7 @@ dependencies = [
 [[package]]
 name = "vtable-macro"
 version = "0.1.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b2b8eecdb8e4284adf5546fc518f048f6dc33e7203dbe36fa93a4add39b31f6"
+source = "git+https://github.com/slint-ui/slint.git?branch=olivier/fix-3700#c03366792958460a84e4c340a34928643338a963"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/czkawka_slint_gui/Cargo.toml b/czkawka_slint_gui/Cargo.toml
index fe3ee64..c47e946 100644
--- a/czkawka_slint_gui/Cargo.toml
+++ b/czkawka_slint_gui/Cargo.toml
@@ -14,7 +14,8 @@ build = "build.rs"
 #slint = "1.2.2"
 slint = { git = "https://github.com/slint-ui/slint.git", branch = "olivier/fix-3700"}
 rand = "0.8.5"
-#czkawka_core = { version = "6.1.0", path = "../czkawka_core" }
+czkawka_core = { version = "6.1.0", path = "../czkawka_core" }
+chrono = "0.4.31"
 
 [build-dependencies]
 slint-build = { git = "https://github.com/slint-ui/slint.git", branch = "olivier/fix-3700"}
\ No newline at end of file
diff --git a/czkawka_slint_gui/src/connect_delete.rs b/czkawka_slint_gui/src/connect_delete.rs
new file mode 100644
index 0000000..cb3af34
--- /dev/null
+++ b/czkawka_slint_gui/src/connect_delete.rs
@@ -0,0 +1,30 @@
+use crate::MainWindow;
+use slint::{ComponentHandle, Model, ModelRc, VecModel};
+use std::borrow::BorrowMut;
+
+pub fn connect_delete_button(app: &MainWindow) {
+    let a = app.as_weak();
+    app.on_deleted(move || {
+        let app = a.upgrade().unwrap();
+
+        let mut r = app.get_empty_folder_model();
+        let m = r.borrow_mut();
+        let length_before = m.iter().count();
+        let (entries_to_delete, entries_left): (Vec<_>, Vec<_>) = m.iter().partition(|(checked, _selected_row, _header_row, _data)| *checked);
+        let mut s: Vec<_> = m.iter().filter(|(checked, _selected_row, _header_row, _data)| !*checked).collect();
+
+        entries_to_delete.into_iter().for_each(|(_checked, _selected_row, _header_row, _data)| {
+            // TODO delete in parallel items, consider to add progress bar
+        });
+
+        let length_after = s.len();
+        if length_before != length_after {
+            dbg!(format!("Items to remove {}", length_before - length_after));
+            s.iter_mut().for_each(|(_checked, selected_row, _header_row, _data)| {
+                *selected_row = false;
+            });
+            let r = ModelRc::new(VecModel::from(s));
+            app.set_empty_folder_model(r.into());
+        }
+    });
+}
diff --git a/czkawka_slint_gui/src/connect_scan.rs b/czkawka_slint_gui/src/connect_scan.rs
new file mode 100644
index 0000000..35c8335
--- /dev/null
+++ b/czkawka_slint_gui/src/connect_scan.rs
@@ -0,0 +1,54 @@
+use crate::{split_path, CurrentTab, MainWindow};
+use chrono::NaiveDateTime;
+use czkawka_core::common_tool::CommonData;
+use czkawka_core::empty_folder::EmptyFolder;
+use slint::{ComponentHandle, ModelRc, SharedString, VecModel};
+use std::path::PathBuf;
+use std::rc::Rc;
+use std::thread;
+
+pub fn connect_scan_button(app: &MainWindow) {
+    let a = app.as_weak();
+    app.on_scanned(move |active_tab| {
+        let app = a.upgrade().unwrap();
+        app.set_scanning(true);
+
+        let a = app.as_weak();
+        match active_tab {
+            CurrentTab::EmptyFolders => {
+                thread::spawn(move || {
+                    let mut ef = EmptyFolder::new();
+                    ef.set_included_directory(vec![PathBuf::from("/home/rafal/Desktop")]);
+                    ef.find_empty_folders(None, None);
+
+                    ef.get_empty_folder_list();
+
+                    let mut vector = ef.get_empty_folder_list().keys().cloned().collect::<Vec<PathBuf>>();
+
+                    vector.sort_unstable_by_key(|e| {
+                        let t = split_path(e.as_path());
+                        (t.0, t.1)
+                    });
+
+                    a.upgrade_in_event_loop(move |app| {
+                        let mut folder_map = ef.get_empty_folder_list();
+                        let items = Rc::new(VecModel::default());
+                        for path in vector {
+                            let (directory, file) = split_path(&path);
+                            let data_model = VecModel::from_slice(&[
+                                SharedString::from(file),
+                                SharedString::from(directory),
+                                SharedString::from(NaiveDateTime::from_timestamp_opt(folder_map[&path].modified_date as i64, 0).unwrap().to_string()),
+                            ]);
+
+                            items.push((false, false, false, ModelRc::new(data_model)));
+                        }
+                        app.set_empty_folder_model(items.into());
+                        app.set_scanning(false);
+                    })
+                });
+            }
+            _ => panic!(),
+        }
+    });
+}
diff --git a/czkawka_slint_gui/src/main.rs b/czkawka_slint_gui/src/main.rs
index 6a95264..1981802 100644
--- a/czkawka_slint_gui/src/main.rs
+++ b/czkawka_slint_gui/src/main.rs
@@ -1,11 +1,21 @@
-use std::rc::Rc;
-use slint::{Model, ModelRc, SharedString, VecModel};
-slint::include_modules!();
-use std::borrow::BorrowMut;
+mod connect_delete;
+mod connect_scan;
 
+use std::borrow::BorrowMut;
+use std::path::Path;
+use std::rc::Rc;
+
+use crate::connect_delete::connect_delete_button;
+use crate::connect_scan::connect_scan_button;
+
+use czkawka_core::common_tool::CommonData;
+use czkawka_core::empty_folder::EmptyFolder;
+use slint::{Model, ModelRc, SharedString, VecModel};
+
+slint::include_modules!();
 fn main() {
-    let app = MainWindow::new().unwrap();//.run().unwrap();
-    let row_data: Rc<VecModel<(bool,bool,ModelRc<SharedString>)>> = Rc::new(VecModel::default());
+    let app = MainWindow::new().unwrap(); //.run().unwrap();
+    let row_data: Rc<VecModel<(bool, bool, bool, ModelRc<SharedString>)>> = Rc::new(VecModel::default());
 
     for r in 0..1000 {
         let items = VecModel::default();
@@ -14,33 +24,20 @@ fn main() {
             items.push(slint::format!("Item {r}.{c}").into());
         }
 
-        row_data.push((r % 2 == 0, r% 3 == 0, ModelRc::new(items)));
+        row_data.push((r % 4 == 0, r % 3 == 0, r % 2 == 0, ModelRc::new(items)));
     }
-    app.set_empty_folder_model(row_data.into());
+    // app.set_empty_folder_model(row_data.into());
 
-    let a = app.as_weak();
-    app.on_deleted(move || {
-        let app = a.upgrade().unwrap();
-
-
-        let mut r = app.get_empty_folder_model();
-        let m = r.borrow_mut();
-        let length_before = m.iter().count();
-        let mut s: Vec<_> = m.iter().filter(|(a,_b,_c)|{
-            !*a
-        }).collect();
-
-
-        let length_after = s.len();
-        if length_before != length_after {
-            dbg!(format!("Items to remove {}", length_before - length_after));
-            s.iter_mut().for_each(|(_a, selected_row, _)|{
-                *selected_row = false;
-            });
-            let r = ModelRc::new(VecModel::from(s));
-            app.set_empty_folder_model(r.into());
-        }
-    });
+    connect_delete_button(&app);
+    connect_scan_button(&app);
 
     app.run().unwrap();
-}
\ No newline at end of file
+}
+
+pub fn split_path(path: &Path) -> (String, String) {
+    match (path.parent(), path.file_name()) {
+        (Some(dir), Some(file)) => (dir.display().to_string(), file.to_string_lossy().into_owned()),
+        (Some(dir), None) => (dir.display().to_string(), String::new()),
+        (None, _) => (String::new(), String::new()),
+    }
+}
diff --git a/czkawka_slint_gui/ui/main_window.slint b/czkawka_slint_gui/ui/main_window.slint
index 7640d4d..daf35f2 100644
--- a/czkawka_slint_gui/ui/main_window.slint
+++ b/czkawka_slint_gui/ui/main_window.slint
@@ -1,19 +1,24 @@
 import { Button, VerticalBox , HorizontalBox, TabWidget, ListView, StandardListView, StandardTableView, CheckBox} from "std-widgets.slint";
 import {SelectableTableView} from "selectable_tree_view.slint";
+import {LeftSidePanel} from "left_side_panel.slint";
+import {CurrentTab} from "common.slint";
 
-enum CurrentTab {
-    EmptyFolders,
-    SimilarImages,
-}
-
-export component MainWindow {
+export component MainWindow inherits Window {
     callback deleted;    
-    in-out property <CurrentTab> active-tab;
-    in-out property <[{checked: bool, selected_row: bool, val:[string]}]> empty-folder-model: [
-        {checked: false, selected_row: false, val: ["kropkarz", "/Xd1", "24.10.2023"]} ,
-        {checked: false, selected_row: true, val: ["witasphere", "/Xd1/Imagerren2", "25.11.1991"]} ,
-        {checked: true, selected_row: false, val: ["lokkaler", "/Xd1/Vide2", "01.23.1911"]} ,
-];
+    callback scanned(CurrentTab);
+
+    in-out property <bool> scanning: false;
+
+    in-out property <CurrentTab> active-tab: CurrentTab.EmptyFolders;
+    in-out property <[{checked: bool, selected_row: bool, header_row: bool, val:[string]}]> empty_folder_model: [
+        {checked: false, selected_row: false, header_row: true, val: ["kropkarz", "/Xd1", "24.10.2023"]} ,
+        {checked: false, selected_row: true, header_row: false, val: ["witasphere", "/Xd1/Imagerren2", "25.11.1991"]} ,
+        {checked: true, selected_row: false, header_row: false, val: ["lokkaler", "/Xd1/Vide2", "01.23.1911"]}
+    ];
+    in-out property <[{checked: bool, selected_row: bool, header_row: bool, val:[string]}]> empty_files_model: [];
+    in-out property <[{checked: bool, selected_row: bool, header_row: bool, val:[string]}]> similar_images_model: [];
+
+    title: root.active-tab == CurrentTab.EmptyFiles ? "EmptyFiles" : (root.active-tab == CurrentTab.EmptyFolders ? "EmptyFolders" : "Similar Images");
 
     min-width: 200px;
     VerticalBox {
@@ -21,32 +26,42 @@ export component MainWindow {
             // min-width: 600px;
             preferred-height: 300px;
 
-            tab_bar := VerticalLayout {
-                width: 120px;
-                spacing: 3px;
-                Button {
-                    text: "Empty Folders";
-                    clicked => { root.active-tab = CurrentTab.EmptyFolders; }
-                }
-                Button {
-                    text: "Similar Images";
-                    clicked => { root.active-tab = CurrentTab.SimilarImages; }
-                }
+            LeftSidePanel {
+                scanning: root.scanning;
+                active-tab <=> root.active-tab;
             }
 
-            // TODO - using root.active-tab in visible property will not
+            // TODO - using root.active-tab in visible property will not clear model
             if root.active-tab == CurrentTab.EmptyFolders: SelectableTableView {
                 min-width: 200px;
 
                 columns: ["Selection", "Folder Name", "Path", "Modification Date"];
                 values: empty-folder-model;
             }
+            if root.active-tab == CurrentTab.EmptyFiles: SelectableTableView {
+                min-width: 200px;
+
+                columns: ["Selection", "Folder Name", "Path", "Modification Date"];
+                values: empty-files-model;
+            }
+            if root.active-tab == CurrentTab.SimilarImages: SelectableTableView {
+                min-width: 200px;
+
+                columns: ["Selection", "Folder Name", "Path", "Modification Date"];
+                values: similar-images-model;
+            }
         }
         HorizontalBox {
+            height: 50px;
             scan_button:= Button {
+                enabled: !scanning;
                 text: "Scan";
+                clicked => {
+                    root.scanned(active-tab);
+                }
             }
             delete_button:= Button {
+                enabled: !scanning;
                 text: "Delete";
                 clicked => {
                     root.deleted();
@@ -55,4 +70,3 @@ export component MainWindow {
         }
     }
 }
-
diff --git a/czkawka_slint_gui/ui/selectable_tree_view.slint b/czkawka_slint_gui/ui/selectable_tree_view.slint
index 9e1c006..777b1c9 100644
--- a/czkawka_slint_gui/ui/selectable_tree_view.slint
+++ b/czkawka_slint_gui/ui/selectable_tree_view.slint
@@ -2,7 +2,7 @@ import { Button, VerticalBox , HorizontalBox, TabWidget, ListView, StandardListV
 
 export component SelectableTableView inherits Rectangle {
     in property <[string]> columns;
-    in property <[{checked: bool, selected_row: bool, val:[string]}]> values;
+    in property <[{checked: bool, selected_row: bool, header_row: bool, val:[string]}]> values;
 
     private property <[length]> column_sizes: [30px, 100px, 100px, 100px];
     private property <int> column_number: 4;
@@ -44,13 +44,16 @@ export component SelectableTableView inherits Rectangle {
             }
         }
         list_view:= ListView {
+            min-width: 100px;
             for r[idx] in root.values : Rectangle {
-                background: touch-area.has-hover ? (r.selected_row ? #cccccc : #dddddd) : (r.selected_row ? #cccccc: #dddddd);
+                background: r.header-row ? #888888 : (touch-area.has-hover ? (r.selected_row ? #cccccc : #dddddd) : (r.selected_row ? #cccccc: #dddddd));
                 // background: touch-area.has-hover ? (selected ? #333333 : #222222) : (selected ? #333333: #222222);
 
                 touch_area:= TouchArea {
                     clicked => {
-                        r.selected_row = !r.selected_row
+                        if (!r.header_row) {
+                            r.selected_row = !r.selected_row
+                        }
                     }
                 }
 
@@ -61,7 +64,8 @@ export component SelectableTableView inherits Rectangle {
 
                     CheckBox {
                         //min-width: 200px;
-                        checked: r.checked;
+                        visible: !r.header-row;
+                        checked: r.checked && !r.header-row;
                         width: root.column-sizes[0];
                         toggled => {
                             r.checked = self.checked;