Revert key-repeat behavior (#2429)

* Revert key-repeat behavior

This fixes key-repeats everywhere in egui where it was broken,including:

- Enter in TextEdit:s
- Arrow keys for sliders and dragvalues
- …

* Update changelog

* Remove old comment

CHANGELOG.md

@@ -5,8 +5,11 @@ NOTE: [`epaint`](crates/epaint/CHANGELOG.md), [`eframe`](crates/eframe/CHANGELOG
 
 
 ## Unreleased
+### Changed 🔧
+* `InputState`: all press functions again include key repeates (like in egui 0.19) ([#2429](https://github.com/emilk/egui/pull/2429)).
+
 ### Fixed 🐛
-* Fix key-repeat for backspace and arrow keys in `TextEdit` ([#2416](https://github.com/emilk/egui/pull/2416)).
+* Fix key-repeats for `TextEdit`, `Slider`s, etc ([#2429](https://github.com/emilk/egui/pull/2429)).
 
 
 ## 0.20.0 - 2022-12-08 - AccessKit, prettier text, overlapping widgets

crates/egui/src/data/input.rs

@@ -1,5 +1,7 @@
 //! The input needed by egui.
 
+#![allow(deprecated)] // TODO(emilk): remove
+
 use crate::emath::*;
 
 /// What the integrations provides to egui at the start of each frame.
@@ -191,13 +193,9 @@ pub enum Event {
         modifiers: Modifiers,
     },
 
-    /// A key was repeated while pressed.
-    KeyRepeat {
-        key: Key,
-
-        /// The state of the modifier keys at the time of the event.
-        modifiers: Modifiers,
-    },
+    /// DEPRECATED - DO NOT USE
+    #[deprecated = "Do not use"]
+    KeyRepeat { key: Key, modifiers: Modifiers },
 
     /// The mouse or touch moved to a new place.
     PointerMoved(Pos2),

crates/egui/src/input_state.rs

@@ -166,20 +166,10 @@ impl InputState {
         let mut zoom_factor_delta = 1.0;
         for event in &mut new.events {
             match event {
-                Event::Key {
-                    key,
-                    pressed,
-                    modifiers,
-                } => {
+                Event::Key { key, pressed, .. } => {
                     if *pressed {
-                        // We only retain presses that are novel (i.e. the first Press event, not those generated by key-repeat)
-                        // key repeats are represented by KeyRepeat.
-                        if !keys_down.insert(*key) {
-                            *event = Event::KeyRepeat {
-                                key: *key,
-                                modifiers: *modifiers,
-                            };
-                        }
+                        keys_down.insert(*key);
+                        // TODO(emilk): detect key repeats and mark the event accordingly!
                     } else {
                         keys_down.remove(key);
                     }
@@ -262,6 +252,8 @@ impl InputState {
     }
 
     /// Count presses of a key. If non-zero, the presses are consumed, so that this will only return non-zero once.
+    ///
+    /// Includes key-repeat events.
     pub fn count_and_consume_key(&mut self, modifiers: Modifiers, key: Key) -> usize {
         let mut count = 0usize;
 
@@ -284,35 +276,40 @@ impl InputState {
     }
 
     /// Check for a key press. If found, `true` is returned and the key pressed is consumed, so that this will only return `true` once.
+    ///
+    /// Includes key-repeat events.
     pub fn consume_key(&mut self, modifiers: Modifiers, key: Key) -> bool {
         self.count_and_consume_key(modifiers, key) > 0
     }
 
     /// Check if the given shortcut has been pressed.
     ///
     /// If so, `true` is returned and the key pressed is consumed, so that this will only return `true` once.
+    ///
+    /// Includes key-repeat events.
     pub fn consume_shortcut(&mut self, shortcut: &KeyboardShortcut) -> bool {
         let KeyboardShortcut { modifiers, key } = *shortcut;
         self.consume_key(modifiers, key)
     }
 
     /// Was the given key pressed this frame?
+    ///
+    /// Includes key-repeat events.
     pub fn key_pressed(&self, desired_key: Key) -> bool {
         self.num_presses(desired_key) > 0
     }
 
     /// How many times was the given key pressed this frame?
+    ///
+    /// Includes key-repeat events.
     pub fn num_presses(&self, desired_key: Key) -> usize {
         self.events
             .iter()
             .filter(|event| {
                 matches!(
                     event,
-                    Event::Key {
-                        key,
-                        pressed: true,
-                        ..
-                    } if *key == desired_key
+                    Event::Key { key, pressed: true, .. }
+                    if *key == desired_key
                 )
             })
             .count()

crates/egui/src/widgets/text_edit/builder.rs

@@ -919,10 +919,6 @@ fn events(
                 modifiers,
             } => on_key_press(&mut cursor_range, text, galley, *key, modifiers),
 
-            Event::KeyRepeat { key, modifiers } => {
-                on_key_press(&mut cursor_range, text, galley, *key, modifiers)
-            }
-
             Event::CompositionStart => {
                 state.has_ime = true;
                 None