show-hide binding

src/backend/common.rs

@@ -50,12 +50,14 @@ where
         overlays.insert(watch.state.id, watch);
 
         let mut keyboard = create_keyboard(&app);
+        keyboard.state.show_hide = true;
         keyboard.state.want_visible = true;
         overlays.insert(keyboard.state.id, keyboard);
 
         let mut first = true;
         for mut screen in screens {
             if first {
+                screen.state.show_hide = true;
                 screen.state.want_visible = true;
                 first = false;
             }
@@ -94,6 +96,19 @@ where
     pub fn iter_mut<'a>(&'a mut self) -> impl Iterator<Item = &'a mut OverlayData<T>> {
         self.overlays.values_mut()
     }
+
+    pub fn show_hide(&mut self) {
+        let any_shown = self
+            .overlays
+            .values()
+            .any(|o| o.state.show_hide && o.state.want_visible);
+
+        self.overlays.values_mut().for_each(|o| {
+            if o.state.show_hide {
+                o.state.want_visible = !any_shown;
+            }
+        })
+    }
 }
 
 pub enum OverlaySelector {

src/backend/openvr/mod.rs

@@ -147,6 +147,15 @@ pub fn openvr_run(running: Arc<AtomicBool>) -> Result<(), BackendError> {
         input_source.update(&mut input_mngr, &mut system_mngr, &mut state);
         state.input_state.post_update();
 
+        if state
+            .input_state
+            .pointers
+            .iter()
+            .any(|p| p.now.show_hide && !p.before.show_hide)
+        {
+            overlays.show_hide();
+        }
+
         overlays
             .iter_mut()
             .for_each(|o| o.state.auto_movement(&mut state));

src/backend/openxr/input.rs

@@ -1,3 +1,5 @@
+use std::time::{Duration, Instant};
+
 use glam::{bool, Affine3A, Quat, Vec3};
 use openxr as xr;
 
@@ -6,6 +8,28 @@ use crate::{backend::input::Pointer, state::AppState};
 use super::XrState;
 
 type XrSession = xr::Session<xr::Vulkan>;
+static DOUBLE_CLICK_TIME: Duration = Duration::from_millis(500);
+
+pub(super) struct DoubleClickCounter {
+    pub(super) last_click: Option<Instant>,
+}
+
+impl DoubleClickCounter {
+    pub(super) fn new() -> Self {
+        Self { last_click: None }
+    }
+
+    // submit a click. returns true if it should count as a double click
+    pub(super) fn click(&mut self) -> bool {
+        let now = Instant::now();
+        let double_click = match self.last_click {
+            Some(last_click) => now - last_click < DOUBLE_CLICK_TIME,
+            None => false,
+        };
+        self.last_click = if double_click { None } else { Some(now) };
+        double_click
+    }
+}
 
 pub(super) struct OpenXrInputSource {
     action_set: xr::ActionSet,

src/backend/openxr/mod.rs

@@ -16,7 +16,7 @@ use crate::{
     backend::{
         common::OverlayContainer,
         input::interact,
-        openxr::{lines::LinePool, overlay::OpenXrOverlayData},
+        openxr::{input::DoubleClickCounter, lines::LinePool, overlay::OpenXrOverlayData},
     },
     graphics::WlxGraphics,
     state::AppState,
@@ -114,6 +114,8 @@ pub fn openxr_run(running: Arc<AtomicBool>) -> Result<(), BackendError> {
     let mut session_running = false;
     let mut event_storage = xr::EventDataBuffer::new();
 
+    let mut show_hide_counter = DoubleClickCounter::new();
+
     'main_loop: loop {
         if !running.load(Ordering::Relaxed) {
             log::warn!("Received shutdown signal.");
@@ -184,6 +186,17 @@ pub fn openxr_run(running: Arc<AtomicBool>) -> Result<(), BackendError> {
         input_source.update(&xr_state, &mut app_state);
         app_state.input_state.post_update();
 
+        if app_state
+            .input_state
+            .pointers
+            .iter()
+            .any(|p| p.now.show_hide && !p.before.show_hide)
+        {
+            if show_hide_counter.click() {
+                overlays.show_hide();
+            }
+        }
+
         let (_, views) = xr_state
             .session
             .locate_views(