Add keyboard support and hold to step

src/debug_tools.rs

@@ -371,6 +371,7 @@ pub struct DebugToolsPlugin;
 struct FrameStepState {
     requested: bool,
     time_backup: Option<Time>,
+    last_step_time: Time
 }
 
 impl Plugin for DebugToolsPlugin {
@@ -424,6 +425,7 @@ fn frame_step_duration(frame_rate: usize) -> Duration {
 fn prepare_frame_step(
     settings: Res<DebugSettings>,
     gamepads: Query<&Gamepad>,
+    key: Res<ButtonInput<KeyCode>>,
     mut state: ResMut<FrameStepState>,
     mut time: ResMut<Time>,
     frame_rate: Res<RollbackFrameRate>,
@@ -433,10 +435,24 @@ fn prepare_frame_step(
         return;
     }
 
-    if !settings.menu_open
-        && gamepads
+    let pressed = gamepads
         .iter()
-            .any(|gamepad| gamepad.just_pressed(GamepadButton::DPadDown))
+        .any(|gamepad| gamepad.pressed(GamepadButton::DPadDown));
+
+    let just_pressed = gamepads
+            .iter()
+            .any(|gamepad| gamepad.just_pressed(GamepadButton::DPadDown));
+
+    let just_pressed = key.just_pressed(KeyCode::F4) || just_pressed;
+    let pressed = key.pressed(KeyCode::F4) || pressed;
+
+    if just_pressed {
+        state.last_step_time = time.clone();
+    }
+
+    let can_repress = pressed && (time.elapsed() - state.last_step_time.elapsed()).as_millis() > 500;
+
+    if !settings.menu_open && (just_pressed || can_repress)
     {
         state.requested = true;
     }