Hide and show joints in the browser, like other items (#1168)

Fixes #1160.

crates/ui-egui/src/context_menu.rs

@@ -550,6 +550,12 @@ fn plane_items(app: &SolveApp, id: u64) -> Vec<Item> {
 fn joint_items(app: &SolveApp, id: u64) -> Vec<Item> {
     let Some(j) = app.session.doc.assembly.joints.iter().find(|j| j.id == id) else { return Vec::new() };
     let rigid = j.kind == solidcraft_engine::doc::joints::JointKind::Rigid;
+    // Show/Hide acts on every joint picked in the browser (this one among them).
+    let mut joints = app.tree.picked_joints.clone();
+    if !joints.contains(&id) {
+        joints = vec![id];
+    }
+    let hidden = !joints.iter().any(|j| app.session.joint_visible(*j));
     vec![
         act("ui.editJoint", "Edit Joint", "joint").with(json!({ "joint": id })),
         act("ui.editJoint", "Edit Joint Limits", "").with(json!({ "joint": id })).on(!rigid),
@@ -560,6 +566,9 @@ fn joint_items(app: &SolveApp, id: u64) -> Vec<Item> {
         Item::sep(),
         cmd(app, "joint.delete", "Delete").key("Del").with(json!({ "joint": id })),
         act("ui.rename", "Rename", "").with(json!({ "joint": id })),
+        Item::sep(),
+        // Hiding a joint hides only its glyph: it still constrains and moves the parts.
+        act("browser.visibility", "Show/Hide", "eye").key("V").with(json!({ "joints": joints, "visible": hidden })),
     ]
 }
 
@@ -1094,7 +1103,7 @@ pub fn delete(app: &mut SolveApp) {
 
 /// Show/Hide (the V key): what is selected in the viewport or picked in the browser flips its
 /// visibility (bodies, faces' and edges' bodies, sketches, construction and origin planes and
-/// axes, components' bodies, canvases). When some are shown and some hidden, all are hidden.
+/// axes, components' bodies, canvases, joints' glyphs). When some are shown and some hidden, all are hidden.
 pub fn toggle_visibility(app: &mut SolveApp) {
     use solidcraft_engine::doc::FeatureKind;
     let paths: Vec<Vec<u64>> =
@@ -1124,7 +1133,9 @@ pub fn toggle_visibility(app: &mut SolveApp) {
         })
         .collect();
     let canvases = app.tree.picked_canvases.clone();
+    let joints = app.tree.picked_joints.clone();
     let any_visible = bodies.iter().any(|b| !app.session.visibility.hidden_bodies.contains(b))
+        || joints.iter().any(|j| app.session.joint_visible(*j))
         || sketches.iter().any(|s| crate::browser::sketch_visible(app, *s))
         || origin.iter().any(|o| !app.session.visibility.hidden_origin.contains(o))
         || app.session.doc.canvases.iter().any(|c| canvases.contains(&c.id) && c.visible);
@@ -1138,6 +1149,9 @@ pub fn toggle_visibility(app: &mut SolveApp) {
     for s in sketches {
         crate::browser::set_sketch_visible(app, s, !hide);
     }
+    if !joints.is_empty() {
+        let _ = app.run("browser.visibility", json!({ "joints": joints, "visible": !hide }));
+    }
     for c in canvases {
         let _ = app.run("canvas.edit", json!({ "canvas": c, "visible": !hide }));
     }