Adjust flick detection

Author: lucasmerlin

crates/egui_router/src/router.rs

@@ -20,8 +20,6 @@ enum SwipeBackGestureState {
     Swiping {
         /// Distance swiped in pixels
         distance: f32,
-        /// Horizontal velocity in pixels per second
-        velocity: f32,
     },
 }
 
@@ -369,7 +367,7 @@ impl<State: 'static, H: History + Default> EguiRouter<State, H> {
         }) && !ui.ctx().is_being_dragged(gesture_id);
 
         if sense.contains_pointer() && !is_something_blocking_drag {
-            let (pointer_pos, delta, any_released, dt) = ui.input(|input| {
+            let (pointer_pos, delta, any_released, velocity) = ui.input(|input| {
                 (
                     input.pointer.interact_pos(),
                     if input.pointer.is_decidedly_dragging() {
@@ -378,7 +376,7 @@ impl<State: 'static, H: History + Default> EguiRouter<State, H> {
                         None
                     },
                     input.pointer.any_released(),
-                    input.stable_dt,
+                    input.pointer.velocity(),
                 )
             });
 
@@ -391,7 +389,6 @@ impl<State: 'static, H: History + Default> EguiRouter<State, H> {
                                 // Start the gesture
                                 gesture_state = SwipeBackGestureState::Swiping {
                                     distance: 0.0,
-                                    velocity: 0.0,
                                 };
 
                                 // Start a manual backward transition
@@ -414,12 +411,8 @@ impl<State: 'static, H: History + Default> EguiRouter<State, H> {
                         // Update the gesture distance (only positive horizontal movement)
                         let new_distance = (distance + delta.x).max(0.0);
 
-                        // Calculate velocity (pixels per second)
-                        let new_velocity = if dt > 0.0 { delta.x / dt } else { 0.0 };
-
                         gesture_state = SwipeBackGestureState::Swiping {
                             distance: new_distance,
-                            velocity: new_velocity,
                         };
 
                         if new_distance > 10.0 {
@@ -438,16 +431,16 @@ impl<State: 'static, H: History + Default> EguiRouter<State, H> {
             }
 
             if any_released {
-                if let SwipeBackGestureState::Swiping { distance, velocity } = gesture_state {
+                if let SwipeBackGestureState::Swiping { distance } = gesture_state {
                     // Velocity threshold for flick gesture (pixels per second)
-                    const FLICK_VELOCITY_THRESHOLD: f32 = 500.0;
+                    const FLICK_VELOCITY_THRESHOLD: f32 = 100.0;
 
                     let screen_width = content_rect.width();
                     let progress = distance / screen_width;
 
                     // Check if we've swiped far enough OR flicked fast enough to trigger back navigation
                     let should_navigate_back = progress >= self.swipe_back_threshold
-                        || velocity >= FLICK_VELOCITY_THRESHOLD;
+                        || velocity.x >= FLICK_VELOCITY_THRESHOLD;
 
                     if should_navigate_back {
                         let popped = self.history.pop();