wip

crates/gpui/src/app.rs

@@ -3816,6 +3816,12 @@ impl<T> PartialEq for ViewHandle<T> {
     }
 }
 
+impl<T> PartialEq<AnyViewHandle> for ViewHandle<T> {
+    fn eq(&self, other: &AnyViewHandle) -> bool {
+        self.window_id == other.window_id && self.view_id == other.view_id
+    }
+}
+
 impl<T> PartialEq<WeakViewHandle<T>> for ViewHandle<T> {
     fn eq(&self, other: &WeakViewHandle<T>) -> bool {
         self.window_id == other.window_id && self.view_id == other.view_id

crates/gpui/src/elements.rs

@@ -33,8 +33,11 @@ use crate::{
         rect::RectF,
         vector::{vec2f, Vector2F},
     },
-    json, Action, LayoutContext, SceneBuilder, SizeConstraint, View, ViewContext, WeakViewHandle,
-    WindowContext,
+    json,
+    platform::MouseButton,
+    scene::MouseDown,
+    Action, EventContext, LayoutContext, SceneBuilder, SizeConstraint, View, ViewContext,
+    WeakViewHandle, WindowContext,
 };
 use anyhow::{anyhow, Result};
 use collections::HashMap;
@@ -198,6 +201,13 @@ pub trait Element<V: View>: 'static {
     {
         Resizable::new(self.into_any(), side, size, on_resize)
     }
+
+    fn mouse<Tag>(self, region_id: usize) -> MouseEventHandler<Tag, V>
+    where
+        Self: Sized,
+    {
+        MouseEventHandler::for_child(self.into_any(), region_id)
+    }
 }
 
 trait AnyElementState<V: View> {

crates/gpui/src/elements/mouse_event_handler.rs

@@ -32,10 +32,25 @@ pub struct MouseEventHandler<Tag: 'static, V: View> {
 /// Element which provides a render_child callback with a MouseState and paints a mouse
 /// region under (or above) it for easy mouse event handling.
 impl<Tag, V: View> MouseEventHandler<Tag, V> {
-    pub fn new<D, F>(region_id: usize, cx: &mut ViewContext<V>, render_child: F) -> Self
+    pub fn for_child(child: impl Element<V>, region_id: usize) -> Self {
+        Self {
+            child: child.into_any(),
+            region_id,
+            cursor_style: None,
+            handlers: Default::default(),
+            notify_on_hover: false,
+            notify_on_click: false,
+            hoverable: false,
+            above: false,
+            padding: Default::default(),
+            _tag: PhantomData,
+        }
+    }
+
+    pub fn new<E, F>(region_id: usize, cx: &mut ViewContext<V>, render_child: F) -> Self
     where
-        D: Element<V>,
-        F: FnOnce(&mut MouseState, &mut ViewContext<V>) -> D,
+        E: Element<V>,
+        F: FnOnce(&mut MouseState, &mut ViewContext<V>) -> E,
     {
         let mut mouse_state = cx.mouse_state::<Tag>(region_id);
         let child = render_child(&mut mouse_state, cx).into_any();