When the ScrollBar is set to Visibility::AlwaysVisible, scrolling is always possible & contains pointer

crates/egui/src/containers/scroll_area.rs

@@ -870,7 +870,21 @@ impl Prepared {
 
  let max_offset = content_size - inner_rect.size();
  let is_hovering_outer_rect = ui.rect_contains_pointer(outer_rect);
- if scrolling_enabled && is_hovering_outer_rect {
+
+ if scrolling_enabled
+ && (is_hovering_outer_rect
+ || scroll_bar_visibility == ScrollBarVisibility::AlwaysVisible)
+ {
+ let pointer_position = ui.input(|i| i.pointer.interact_pos().unwrap_or_default());
+ if inner_rect.contains(pointer_position) {
+ ui.ctx().input_mut(|input| {
+ input.smooth_scroll_delta[0] += input.raw_scroll_delta[0];
+ input.smooth_scroll_delta[1] += input.raw_scroll_delta[1];
+ input.raw_scroll_delta[0] = 0.0;
+ input.raw_scroll_delta[1] = 0.0;
+ });
+ }
+
  let always_scroll_enabled_direction = ui.style().always_scroll_the_only_direction
  && scroll_enabled[0] != scroll_enabled[1];
  for d in 0..2 {

crates/egui/src/input_state.rs

@@ -234,7 +234,9 @@ impl InputState {
  // Mouse wheels often go very large steps.
  // A single notch on a logitech mouse wheel connected to a Macbook returns 14.0 raw_scroll_delta.
  // So we smooth it out over several frames for a nicer user experience when scrolling in egui.
- unprocessed_scroll_delta += raw_scroll_delta;
+
+ // unprocessed_scroll_delta += raw_scroll_delta;
+
  let dt = stable_dt.at_most(0.1);
  let t = crate::emath::exponential_smooth_factor(0.90, 0.1, dt); // reach _% in _ seconds. TODO(emilk): parameterize