feat: allow disabling the sliding of screens back and forth (#20)

fix: sliding screens with smooth trackpad scrolling
knuckles smooth trackpad scrolling can return NaN

src/backend/input.rs

@@ -6,6 +6,7 @@ use glam::{Affine3A, Vec2, Vec3A};
 use ovr_overlay::TrackedDeviceIndex;
 use smallvec::{smallvec, SmallVec};
 
+use crate::config::GeneralConfig;
 use crate::state::AppState;
 
 use super::{
@@ -287,7 +288,7 @@ where
     let mut pointer = &mut app.input_state.pointers[idx];
     if let Some(grab_data) = pointer.interaction.grabbed {
         if let Some(grabbed) = overlays.mut_by_id(grab_data.grabbed_id) {
-            pointer.handle_grabbed(grabbed, hmd);
+            pointer.handle_grabbed(grabbed, hmd, &app.session.config);
         } else {
             log::warn!("Grabbed overlay {} does not exist", grab_data.grabbed_id);
             pointer.interaction.grabbed = None;
@@ -472,7 +473,7 @@ impl Pointer {
         log::info!("Hand {}: grabbed {}", self.idx, overlay.state.name);
     }
 
-    fn handle_grabbed<O>(&mut self, overlay: &mut OverlayData<O>, hmd: &Affine3A)
+    fn handle_grabbed<O>(&mut self, overlay: &mut OverlayData<O>, hmd: &Affine3A, config: &GeneralConfig)
     where
         O: Default,
     {
@@ -494,8 +495,10 @@ impl Pointer {
                         .matrix3
                         .mul_scalar(1.0 - 0.025 * self.now.scroll);
                 } else {
+                    if config.allow_sliding && self.now.scroll.is_finite() {
                         grab_data.offset.z -= self.now.scroll * 0.05;
                     }
+                }
                 overlay.state.transform.translation = self.pose.transform_point3a(grab_data.offset);
                 overlay.state.realign(hmd);
                 overlay.state.dirty = true;

src/config.rs

@@ -150,6 +150,9 @@ pub struct GeneralConfig {
 
     #[serde(default = "def_half")]
     pub xr_alt_click_sensitivity_release: f32,
+
+    #[serde(default = "def_true")]
+    pub allow_sliding: bool,
 }
 
 impl GeneralConfig {

src/res/config.yaml

@@ -11,3 +11,7 @@ keyboard_sound_enabled: true
 keyboard_scale: 1.0
 desktop_view_scale: 1.0
 watch_scale: 1.0
+
+# Enable / disable sliding windows back and forth with the scroll action
+# Default: true
+allow_sliding: true