Hide cursor when turning knob

audulus · May 8, 2023 · bfdb923 · bfdb923
1 parent 0140f67
commit bfdb923
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Showing 3 changed files with 22 additions and 6 deletions.
diff --git a/src/views/drag.rs b/src/views/drag.rs
@@ -52,7 +52,7 @@ where
                     cx.touches[*id] = vid;
                     cx.starts[*id] = *position;
                     cx.previous_position[*id] = *position;
-                    cx.grab_cursor = true;
+                    cx.grab_cursor = self.grab;
                 }
             }
             Event::TouchMove { id, position } => {
@@ -178,6 +178,7 @@ where
                     cx.touches[*id] = vid;
                     cx.starts[*id] = *position;
                     cx.previous_position[*id] = *position;
+                    cx.grab_cursor = self.grab;
                 }
             }
             Event::TouchMove { id, position } => {
@@ -196,6 +197,7 @@ where
             Event::TouchEnd { id, position } => {
                 if cx.touches[*id] == vid {
                     cx.touches[*id] = ViewId::default();
+                    cx.grab_cursor = false;
                     let delta = *position - cx.previous_position[*id];
                     let button = cx.mouse_button;
                     actions.push(Box::new((self.func)(

diff --git a/src/views/knob.rs b/src/views/knob.rs
@@ -14,7 +14,7 @@ pub fn knob(value: impl Binding<f32>) -> impl View {
             .color(CLEAR_COLOR)
             .drag_s(value, move |v, delta, _, _| {
                 *v = (*v + (delta.x + delta.y) / 400.0).clamp(0.0, 1.0)
-            }),
+            }).grab_cursor(),
         canvas(move |cx, sz, vger| {
             let c = sz.center();
             let r = sz.width().min(sz.height()) / 2.0;

diff --git a/src/winit_event_loop.rs b/src/winit_event_loop.rs
@@ -113,6 +113,20 @@ async fn setup(window: &Window) -> Setup {
     }
 }
 
+fn process_event(cx: &mut Context, view: &impl View, event: &Event, window: &Window) {
+    cx.process(view, event);
+
+    if cx.grab_cursor {
+        //window.set_cursor_grab(winit::window::CursorGrabMode::Confined)
+        //    .or_else(|_e| window.set_cursor_grab(winit::window::CursorGrabMode::Locked))
+        //    .unwrap();
+        window.set_cursor_visible(false);
+    } else {
+        // window.set_cursor_grab(winit::window::CursorGrabMode::None).unwrap();
+        window.set_cursor_visible(true);
+    }
+}
+
 /// Call this function to run your UI.
 pub fn rui(view: impl View) {
     let event_loop = EventLoop::new();
@@ -270,15 +284,15 @@ pub fn rui(view: impl View) {
                             id: 0,
                             position: mouse_position,
                         };
-                        cx.process(&view, &event)
+                        process_event(&mut cx, &view, &event, &window)
                     }
                     ElementState::Released => {
                         cx.mouse_button = None;
                         let event = Event::TouchEnd {
                             id: 0,
                             position: mouse_position,
                         };
-                        cx.process(&view, &event)
+                        process_event(&mut cx, &view, &event, &window)
                     }
                 };
             }
@@ -312,7 +326,7 @@ pub fn rui(view: impl View) {
                 };
 
                 if let Some(event) = event {
-                    cx.process(&view, &event);
+                    process_event(&mut cx, &view, &event, &window);
                 }
             }
             WEvent::WindowEvent {
@@ -329,7 +343,7 @@ pub fn rui(view: impl View) {
                     id: 0,
                     position: mouse_position,
                 };
-                cx.process(&view, &event)
+                process_event(&mut cx, &view, &event, &window)
             }
 
             WEvent::WindowEvent {