https://github.com/emilk/egui/pull/777

egui/src/widgets/text_edit/builder.rs

@@ -65,6 +65,7 @@ pub struct TextEdit<'t> {
     desired_height_rows: usize,
     lock_focus: bool,
     cursor_at_end: bool,
+    ignore_up_and_down_keys: bool,
 }
 
 impl<'t> WidgetWithState for TextEdit<'t> {
@@ -111,6 +112,7 @@ impl<'t> TextEdit<'t> {
             desired_height_rows: 4,
             lock_focus: false,
             cursor_at_end: true,
+            ignore_up_and_down_keys: false,
         }
     }
 
@@ -254,6 +256,11 @@ impl<'t> TextEdit<'t> {
         self.cursor_at_end = b;
         self
     }
+
+    pub fn ignore_up_and_down_keys(mut self, ignore_up_and_down_keys: bool) -> Self {
+        self.ignore_up_and_down_keys = ignore_up_and_down_keys;
+        self
+    }
 }
 
 // ----------------------------------------------------------------------------
@@ -357,6 +364,7 @@ impl<'t> TextEdit<'t> {
             desired_height_rows,
             lock_focus,
             cursor_at_end,
+            ignore_up_and_down_keys,
         } = self;
 
         let text_color = text_color
@@ -516,6 +524,7 @@ impl<'t> TextEdit<'t> {
                 multiline,
                 password,
                 default_cursor_range,
+                ignore_up_and_down_keys,
             );
 
             if changed {
@@ -687,6 +696,7 @@ fn events(
     multiline: bool,
     password: bool,
     default_cursor_range: CursorRange,
+    ignore_up_and_down_keys: bool,
 ) -> (bool, CursorRange) {
     let mut cursor_range = state.cursor_range(&*galley).unwrap_or(default_cursor_range);
 
@@ -799,7 +809,13 @@ fn events(
                 key,
                 pressed: true,
                 modifiers,
-            } => on_key_press(&mut cursor_range, text, galley, *key, modifiers),
+            } => {
+                if ignore_up_and_down_keys && (*key == Key::ArrowUp || *key == Key::ArrowDown) {
+                    None
+                } else {
+                    on_key_press(&mut cursor_range, text, galley, *key, modifiers)
+                }
+            }
 
             Event::CompositionStart => {
                 state.has_ime = true;