feat: add focus follows the mouse mode (#23)

src/backend/input.rs

@@ -198,6 +198,7 @@ pub struct PointerState {
     pub space_rotate: bool,
     pub click_modifier_right: bool,
     pub click_modifier_middle: bool,
+    pub move_mouse: bool,
 }
 
 #[derive(Debug, Clone, Copy, Default)]

src/backend/openvr/input.rs

@@ -39,6 +39,7 @@ const PATH_SPACE_DRAG: &str = "/actions/default/in/SpaceDrag";
 const PATH_SPACE_ROTATE: &str = "/actions/default/in/SpaceRotate";
 const PATH_CLICK_MODIFIER_RIGHT: &str = "/actions/default/in/ClickModifierRight";
 const PATH_CLICK_MODIFIER_MIDDLE: &str = "/actions/default/in/ClickModifierMiddle";
+const PATH_MOVE_MOUSE: &str = "/actions/default/in/MoveMouse";
 
 const INPUT_ANY: InputValueHandle = InputValueHandle(ovr_overlay::sys::k_ulInvalidInputValueHandle);
 
@@ -54,6 +55,7 @@ pub(super) struct OpenVrInputSource {
     space_rotate_hnd: ActionHandle,
     click_modifier_right_hnd: ActionHandle,
     click_modifier_middle_hnd: ActionHandle,
+    move_mouse_hnd: ActionHandle,
 }
 
 pub(super) struct OpenVrHandSource {
@@ -77,6 +79,7 @@ impl OpenVrInputSource {
         let space_rotate_hnd = input.get_action_handle(PATH_SPACE_ROTATE)?;
         let click_modifier_right_hnd = input.get_action_handle(PATH_CLICK_MODIFIER_RIGHT)?;
         let click_modifier_middle_hnd = input.get_action_handle(PATH_CLICK_MODIFIER_MIDDLE)?;
+        let move_mouse_hnd = input.get_action_handle(PATH_MOVE_MOUSE)?;
 
         let input_hnd: Vec<InputValueHandle> = INPUT_SOURCES
             .iter()
@@ -112,6 +115,7 @@ impl OpenVrInputSource {
             space_rotate_hnd,
             click_modifier_right_hnd,
             click_modifier_middle_hnd,
+            move_mouse_hnd,
             hands,
         })
     }
@@ -212,6 +216,11 @@ impl OpenVrInputSource {
                 .map(|x| x.0.bState)
                 .unwrap_or(false);
 
+            app_hand.now.move_mouse = input
+                .get_digital_action_data(self.move_mouse_hnd, hand.input_hnd)
+                .map(|x| x.0.bState)
+                .unwrap_or(false);
+
             app_hand.now.scroll = input
                 .get_analog_action_data(self.scroll_hnd, hand.input_hnd)
                 .map(|x| x.0.y)

src/backend/openxr/input.rs

@@ -53,6 +53,7 @@ pub(super) struct OpenXrHandSource {
     action_show_hide: xr::Action<bool>,
     action_click_modifier_right: xr::Action<bool>,
     action_click_modifier_middle: xr::Action<bool>,
+    action_move_mouse: xr::Action<bool>,
     action_haptics: xr::Action<xr::Haptic>,
 }
 
@@ -194,6 +195,12 @@ impl OpenXrHand {
             .state(&xr.session, xr::Path::NULL)?
             .current_state;
 
+        pointer.now.move_mouse = self
+            .source
+            .action_move_mouse
+            .state(&xr.session, xr::Path::NULL)?
+            .current_state;
+
         Ok(())
     }
 }
@@ -242,6 +249,11 @@ impl OpenXrHandSource {
             &format!("{} hand middle click modifier", side),
             &[],
         )?;
+        let action_move_mouse = action_set.create_action::<bool>(
+            &format!("{}_move_mouse", side),
+            &format!("{} hand mouse move", side),
+            &[],
+        )?;
         let action_haptics = action_set.create_action::<xr::Haptic>(
             &format!("{}_haptics", side),
             &format!("{} hand haptics", side),
@@ -257,6 +269,7 @@ impl OpenXrHandSource {
             action_show_hide,
             action_click_modifier_right,
             action_click_modifier_middle,
+            action_move_mouse,
             action_haptics,
         })
     }
@@ -359,6 +372,14 @@ fn suggest_bindings(
                 &hands[1].action_click_modifier_middle,
                 instance.string_to_path("/user/hand/right/input/a/touch")?,
             ),
+            xr::Binding::new(
+                &hands[0].action_move_mouse,
+                instance.string_to_path("/user/hand/left/input/trigger/touch")?,
+            ),
+            xr::Binding::new(
+                &hands[1].action_move_mouse,
+                instance.string_to_path("/user/hand/right/input/trigger/touch")?,
+            ),
             xr::Binding::new(
                 &hands[0].action_haptics,
                 instance.string_to_path("/user/hand/left/output/haptic")?,
@@ -434,6 +455,14 @@ fn suggest_bindings(
                 &hands[1].action_click_modifier_middle,
                 instance.string_to_path("/user/hand/right/input/a/touch")?,
             ),
+            xr::Binding::new(
+                &hands[0].action_move_mouse,
+                instance.string_to_path("/user/hand/left/input/trigger/touch")?,
+            ),
+            xr::Binding::new(
+                &hands[1].action_move_mouse,
+                instance.string_to_path("/user/hand/right/input/trigger/touch")?,
+            ),
             xr::Binding::new(
                 &hands[0].action_haptics,
                 instance.string_to_path("/user/hand/left/output/haptic")?,