diff --git a/src/app/browser/window/tab/item/page/input/titan/file.rs b/src/app/browser/window/tab/item/page/input/titan/file.rs
index 23d29b7d..313c8c90 100644
--- a/src/app/browser/window/tab/item/page/input/titan/file.rs
+++ b/src/app/browser/window/tab/item/page/input/titan/file.rs
@@ -1,4 +1,5 @@
 mod control;
+mod form;
 
 use super::Header;
 use gtk::Box;
@@ -10,6 +11,8 @@ pub trait File {
 impl File for Box {
     fn file() -> Self {
         use control::Control;
+        use form::Form;
+        use gtk::Button;
         use std::{cell::Cell, rc::Rc};
 
         // Init components
@@ -18,14 +21,7 @@ impl File for Box {
             token: None,
         }));
         let control = Box::control(&header);
-        let form = {
-            const MARGIN: i32 = 8;
-            gtk::Button::builder()
-                .label("Choose a file..")
-                .margin_bottom(MARGIN)
-                .margin_top(MARGIN)
-                .build()
-        };
+        let form = Button::form();
 
         // Init main widget
         {
diff --git a/src/app/browser/window/tab/item/page/input/titan/file/form.rs b/src/app/browser/window/tab/item/page/input/titan/file/form.rs
new file mode 100644
index 00000000..40a11fed
--- /dev/null
+++ b/src/app/browser/window/tab/item/page/input/titan/file/form.rs
@@ -0,0 +1,25 @@
+use gtk::Button;
+
+pub trait Form {
+    fn form() -> Self;
+}
+
+impl Form for Button {
+    fn form() -> Self {
+        use gtk::prelude::{ButtonExt, WidgetExt};
+
+        const MARGIN: i32 = 8;
+
+        let button = Button::builder()
+            .label("Choose a file..")
+            .margin_bottom(MARGIN)
+            .margin_top(MARGIN)
+            .build();
+
+        button.connect_clicked(|this| {
+            this.set_sensitive(false); // lock
+        });
+
+        button
+    }
+}