Add InteractiveElement::block_mouse which renders an "opaque" layer

Co-Authored-By: Antonio <antonio@zed.dev>
Co-Authored-By: Max Brunsfeld <max@zed.dev>

crates/gpui2/src/elements/div.rs

@@ -345,6 +345,10 @@ impl Interactivity {
         );
         self.tooltip_builder = Some(Rc::new(build_tooltip));
     }
+
+    pub fn block_mouse(&mut self) {
+        self.block_mouse = true;
+    }
 }
 
 pub trait InteractiveElement: Sized {
@@ -564,6 +568,11 @@ pub trait InteractiveElement: Sized {
         self.interactivity().on_drop(listener);
         self
     }
+
+    fn block_mouse(mut self) -> Self {
+        self.interactivity().block_mouse();
+        self
+    }
 }
 
 pub trait StatefulInteractiveElement: InteractiveElement {
@@ -888,6 +897,7 @@ pub struct Interactivity {
     pub drag_listener: Option<(Box<dyn Any>, DragListener)>,
     pub hover_listener: Option<Box<dyn Fn(&bool, &mut WindowContext)>>,
     pub tooltip_builder: Option<TooltipBuilder>,
+    pub block_mouse: bool,
 
     #[cfg(debug_assertions)]
     pub location: Option<core::panic::Location<'static>>,
@@ -1076,7 +1086,8 @@ impl Interactivity {
                 });
             }
 
-            if style
+            if self.block_mouse
+                || style
                     .background
                     .as_ref()
                     .is_some_and(|fill| fill.color().is_some_and(|color| !color.is_transparent()))
@@ -1642,6 +1653,7 @@ impl Default for Interactivity {
             drag_listener: None,
             hover_listener: None,
             tooltip_builder: None,
+            block_mouse: false,
 
             #[cfg(debug_assertions)]
             location: None,

crates/workspace2/src/dock.rs

@@ -499,7 +499,8 @@ impl Render for Dock {
                         cx.stop_propagation();
                     }
                 }))
-                .z_index(1);
+                .z_index(1)
+                .block_mouse();
 
             const HANDLE_SIZE: Pixels = Pixels(6.);