Add screen absolute mouse position for resizing window.

src/event.rs

@@ -38,8 +38,12 @@ pub enum ScrollDelta {
 pub enum MouseEvent {
     /// The mouse cursor was moved
     CursorMoved {
-        /// The logical coordinates of the mouse position
+        /// The logical coordinates of the mouse position (window-relative)
         position: Point,
+        /// The logical coordinates of the mouse position in screen space (absolute)
+        /// This remains constant even when the window resizes, making it suitable
+        /// for drag operations that resize the window.
+        screen_position: Point,
         /// The modifiers that were held down just before the event.
         modifiers: Modifiers,
     },
@@ -79,17 +83,21 @@ pub enum MouseEvent {
     CursorLeft,
 
     DragEntered {
-        /// The logical coordinates of the mouse position
+        /// The logical coordinates of the mouse position (window-relative)
         position: Point,
+        /// The logical coordinates of the mouse position in screen space (absolute)
+        screen_position: Point,
         /// The modifiers that were held down just before the event.
         modifiers: Modifiers,
         /// Data being dragged
         data: DropData,
     },
 
     DragMoved {
-        /// The logical coordinates of the mouse position
+        /// The logical coordinates of the mouse position (window-relative)
         position: Point,
+        /// The logical coordinates of the mouse position in screen space (absolute)
+        screen_position: Point,
         /// The modifiers that were held down just before the event.
         modifiers: Modifiers,
         /// Data being dragged
@@ -99,8 +107,10 @@ pub enum MouseEvent {
     DragLeft,
 
     DragDropped {
-        /// The logical coordinates of the mouse position
+        /// The logical coordinates of the mouse position (window-relative)
         position: Point,
+        /// The logical coordinates of the mouse position in screen space (absolute)
+        screen_position: Point,
         /// The modifiers that were held down just before the event.
         modifiers: Modifiers,
         /// Data being dragged

src/macos/cursor.rs

@@ -0,0 +1,53 @@
+use crate::MouseCursor;
+use cocoa::base::id;
+use objc::{class, msg_send, sel, sel_impl};
+
+pub fn mouse_cursor_to_nscursor(cursor: MouseCursor) -> id {
+    unsafe {
+        let nscursor_class = class!(NSCursor);
+        match cursor {
+            MouseCursor::Default => msg_send![nscursor_class, arrowCursor],
+            MouseCursor::Hand => msg_send![nscursor_class, pointingHandCursor],
+            MouseCursor::HandGrabbing => msg_send![nscursor_class, closedHandCursor],
+            MouseCursor::Help => msg_send![nscursor_class, arrowCursor], // No help cursor
+            MouseCursor::Hidden => {
+                // Return a null cursor for hidden - will be handled specially
+                std::ptr::null_mut()
+            }
+            MouseCursor::Text => msg_send![nscursor_class, IBeamCursor],
+            MouseCursor::VerticalText => msg_send![nscursor_class, IBeamCursor],
+            MouseCursor::Working => msg_send![nscursor_class, arrowCursor],
+            MouseCursor::PtrWorking => msg_send![nscursor_class, arrowCursor],
+            MouseCursor::NotAllowed => msg_send![nscursor_class, operationNotAllowedCursor],
+            MouseCursor::PtrNotAllowed => msg_send![nscursor_class, operationNotAllowedCursor],
+            MouseCursor::ZoomIn => msg_send![nscursor_class, arrowCursor],
+            MouseCursor::ZoomOut => msg_send![nscursor_class, arrowCursor],
+            MouseCursor::Alias => msg_send![nscursor_class, dragLinkCursor],
+            MouseCursor::Copy => msg_send![nscursor_class, dragCopyCursor],
+            MouseCursor::Move => msg_send![nscursor_class, arrowCursor],
+            MouseCursor::AllScroll => msg_send![nscursor_class, arrowCursor],
+            MouseCursor::Cell => msg_send![nscursor_class, crosshairCursor],
+            MouseCursor::Crosshair => msg_send![nscursor_class, crosshairCursor],
+            MouseCursor::EResize => msg_send![nscursor_class, resizeRightCursor],
+            MouseCursor::NResize => msg_send![nscursor_class, resizeUpCursor],
+            MouseCursor::NeResize => msg_send![nscursor_class, arrowCursor], // No built-in
+            MouseCursor::NwResize => msg_send![nscursor_class, arrowCursor], // No built-in
+            MouseCursor::SResize => msg_send![nscursor_class, resizeDownCursor],
+            MouseCursor::SeResize => msg_send![nscursor_class, arrowCursor], // No built-in
+            MouseCursor::SwResize => msg_send![nscursor_class, arrowCursor], // No built-in
+            MouseCursor::WResize => msg_send![nscursor_class, resizeLeftCursor],
+            MouseCursor::EwResize => msg_send![nscursor_class, resizeLeftRightCursor],
+            MouseCursor::NsResize => msg_send![nscursor_class, resizeUpDownCursor],
+            MouseCursor::NwseResize => {
+                // Use private API for diagonal resize cursor
+                msg_send![nscursor_class, _windowResizeNorthWestSouthEastCursor]
+            }
+            MouseCursor::NeswResize => {
+                // Use private API for diagonal resize cursor
+                msg_send![nscursor_class, _windowResizeNorthEastSouthWestCursor]
+            }
+            MouseCursor::ColResize => msg_send![nscursor_class, resizeLeftRightCursor],
+            MouseCursor::RowResize => msg_send![nscursor_class, resizeUpDownCursor],
+        }
+    }
+}

src/macos/mod.rs

@@ -2,6 +2,7 @@
 // Eventually we should migrate to the objc2 crate and remove this.
 #![allow(unexpected_cfgs)]
 
+mod cursor;
 mod keyboard;
 mod view;
 mod window;

src/macos/view.rs

@@ -393,17 +393,38 @@ extern "C" fn update_tracking_areas(this: &Object, _self: Sel, _: id) {
 extern "C" fn mouse_moved(this: &Object, _sel: Sel, event: id) {
     let state = unsafe { WindowState::from_view(this) };
 
-    let point: NSPoint = unsafe {
+    // Window-relative position (existing behavior)
+    let window_point: NSPoint = unsafe {
         let point = NSEvent::locationInWindow(event);
-
         msg_send![this, convertPoint:point fromView:nil]
     };
+
+    // Screen-absolute position (new!)
+    // NSEvent::mouseLocation returns screen coordinates with Y=0 at BOTTOM
+    // We need to flip Y-axis to match Windows/X11 convention (Y=0 at TOP)
+    let screen_point: NSPoint = unsafe {
+        NSEvent::mouseLocation(event)
+    };
+
+    // Get the screen height to flip Y coordinate
+    let screen_height = unsafe {
+        let screen: id = msg_send![class!(NSScreen), mainScreen];
+        let frame: NSRect = msg_send![screen, frame];
+        frame.size.height
+    };
+
     let modifiers = unsafe { NSEvent::modifierFlags(event) };
 
-    let position = Point { x: point.x, y: point.y };
+    let position = Point { x: window_point.x, y: window_point.y };
+    // Flip Y-axis: convert from bottom-origin to top-origin
+    let screen_position = Point {
+        x: screen_point.x,
+        y: screen_height - screen_point.y
+    };
 
     state.trigger_event(Event::Mouse(MouseEvent::CursorMoved {
         position,
+        screen_position,
         modifiers: make_modifiers(modifiers),
     }));
 }
@@ -430,9 +451,29 @@ extern "C" fn scroll_wheel(this: &Object, _: Sel, event: id) {
     }));
 }
 
-fn get_drag_position(sender: id) -> Point {
-    let point: NSPoint = unsafe { msg_send![sender, draggingLocation] };
-    Point::new(point.x, point.y)
+fn get_drag_position(sender: id) -> (Point, Point) {
+    // Window-relative position
+    let window_point: NSPoint = unsafe { msg_send![sender, draggingLocation] };
+
+    // For drag events, we need to get screen position from the global mouse location
+    // since NSDraggingInfo doesn't provide it directly
+    // NSEvent::mouseLocation returns coordinates with Y=0 at BOTTOM
+    let screen_point: NSPoint = unsafe {
+        let ns_event_class: id = msg_send![class!(NSEvent), class];
+        msg_send![ns_event_class, mouseLocation]
+    };
+
+    // Get screen height to flip Y coordinate (convert from bottom-origin to top-origin)
+    let screen_height = unsafe {
+        let screen: id = msg_send![class!(NSScreen), mainScreen];
+        let frame: NSRect = msg_send![screen, frame];
+        frame.size.height
+    };
+
+    (
+        Point::new(window_point.x, window_point.y),
+        Point::new(screen_point.x, screen_height - screen_point.y)
+    )
 }
 
 fn get_drop_data(sender: id) -> DropData {
@@ -473,9 +514,11 @@ extern "C" fn dragging_entered(this: &Object, _sel: Sel, sender: id) -> NSUInteg
     let state = unsafe { WindowState::from_view(this) };
     let modifiers = state.keyboard_state().last_mods();
     let drop_data = get_drop_data(sender);
+    let (position, screen_position) = get_drag_position(sender);
 
     let event = MouseEvent::DragEntered {
-        position: get_drag_position(sender),
+        position,
+        screen_position,
         modifiers: make_modifiers(modifiers),
         data: drop_data,
     };
@@ -487,9 +530,11 @@ extern "C" fn dragging_updated(this: &Object, _sel: Sel, sender: id) -> NSUInteg
     let state = unsafe { WindowState::from_view(this) };
     let modifiers = state.keyboard_state().last_mods();
     let drop_data = get_drop_data(sender);
+    let (position, screen_position) = get_drag_position(sender);
 
     let event = MouseEvent::DragMoved {
-        position: get_drag_position(sender),
+        position,
+        screen_position,
         modifiers: make_modifiers(modifiers),
         data: drop_data,
     };
@@ -508,9 +553,11 @@ extern "C" fn perform_drag_operation(this: &Object, _sel: Sel, sender: id) -> BO
     let state = unsafe { WindowState::from_view(this) };
     let modifiers = state.keyboard_state().last_mods();
     let drop_data = get_drop_data(sender);
+    let (position, screen_position) = get_drag_position(sender);
 
     let event = MouseEvent::DragDropped {
-        position: get_drag_position(sender),
+        position,
+        screen_position,
         modifiers: make_modifiers(modifiers),
         data: drop_data,
     };

src/macos/window.rs

@@ -334,8 +334,18 @@ impl<'a> Window<'a> {
         }
     }
 
-    pub fn set_mouse_cursor(&mut self, _mouse_cursor: MouseCursor) {
-        todo!()
+    pub fn set_mouse_cursor(&mut self, mouse_cursor: MouseCursor) {
+        let ns_cursor = crate::macos::cursor::mouse_cursor_to_nscursor(mouse_cursor);
+
+        unsafe {
+            if ns_cursor.is_null() {
+                // Hide cursor
+                let _: () = msg_send![class!(NSCursor), hide];
+            } else {
+                // Set the cursor
+                let _: () = msg_send![ns_cursor, set];
+            }
+        }
     }
 
     #[cfg(feature = "opengl")]

src/win/drop_target.rs

@@ -73,6 +73,7 @@ pub(super) struct DropTarget {
     // These are cached since DragOver and DragLeave callbacks don't provide them,
     // and handling drag move events gets awkward on the client end otherwise
     drag_position: Point,
+    drag_screen_position: Point,
     drop_data: DropData,
 }
 
@@ -84,6 +85,7 @@ impl DropTarget {
             window_state,
 
             drag_position: Point::new(0.0, 0.0),
+            drag_screen_position: Point::new(0.0, 0.0),
             drop_data: DropData::None,
         }
     }
@@ -117,10 +119,16 @@ impl DropTarget {
         let Some(window_state) = self.window_state.upgrade() else {
             return;
         };
-        let mut pt = POINT { x: pt.x, y: pt.y };
-        unsafe { ScreenToClient(window_state.hwnd, &mut pt as *mut POINT) };
-        let phy_point = PhyPoint::new(pt.x, pt.y);
-        self.drag_position = phy_point.to_logical(&window_state.window_info());
+
+        // Screen-absolute position (pt is already in screen coordinates)
+        let screen_phy_point = PhyPoint::new(pt.x, pt.y);
+        self.drag_screen_position = screen_phy_point.to_logical(&window_state.window_info());
+
+        // Window-relative position (convert from screen to client)
+        let mut window_pt = POINT { x: pt.x, y: pt.y };
+        unsafe { ScreenToClient(window_state.hwnd, &mut window_pt as *mut POINT) };
+        let window_phy_point = PhyPoint::new(window_pt.x, window_pt.y);
+        self.drag_position = window_phy_point.to_logical(&window_state.window_info());
     }
 
     fn parse_drop_data(&mut self, data_object: &IDataObject) {
@@ -216,6 +224,7 @@ impl DropTarget {
 
         let event = MouseEvent::DragEntered {
             position: drop_target.drag_position,
+            screen_position: drop_target.drag_screen_position,
             modifiers,
             data: drop_target.drop_data.clone(),
         };
@@ -240,6 +249,7 @@ impl DropTarget {
 
         let event = MouseEvent::DragMoved {
             position: drop_target.drag_position,
+            screen_position: drop_target.drag_screen_position,
             modifiers,
             data: drop_target.drop_data.clone(),
         };
@@ -272,6 +282,7 @@ impl DropTarget {
 
         let event = MouseEvent::DragDropped {
             position: drop_target.drag_position,
+            screen_position: drop_target.drag_screen_position,
             modifiers,
             data: drop_target.drop_data.clone(),
         };

src/win/window.rs

@@ -197,13 +197,27 @@ unsafe fn wnd_proc_inner(
                     .on_event(&mut window, enter_event);
             }
 
+            // Window-relative position (from lparam)
             let x = (lparam & 0xFFFF) as i16 as i32;
             let y = ((lparam >> 16) & 0xFFFF) as i16 as i32;
 
             let physical_pos = PhyPoint { x, y };
             let logical_pos = physical_pos.to_logical(&window_state.window_info.borrow());
+
+            // Screen-absolute position (using GetCursorPos)
+            let mut screen_physical_pos = POINT { x: 0, y: 0 };
+            unsafe {
+                winapi::um::winuser::GetCursorPos(&mut screen_physical_pos);
+            }
+            let screen_physical = PhyPoint {
+                x: screen_physical_pos.x,
+                y: screen_physical_pos.y
+            };
+            let screen_logical_pos = screen_physical.to_logical(&window_state.window_info.borrow());
+
             let move_event = Event::Mouse(MouseEvent::CursorMoved {
                 position: logical_pos,
+                screen_position: screen_logical_pos,
                 modifiers: window_state
                     .keyboard_state
                     .borrow()

src/x11/event_loop.rs

@@ -176,10 +176,14 @@ impl EventLoop {
                 let physical_pos = PhyPoint::new(event.event_x as i32, event.event_y as i32);
                 let logical_pos = physical_pos.to_logical(&self.window.window_info);
 
+                let screen_physical_pos = PhyPoint::new(event.root_x as i32, event.root_y as i32);
+                let screen_logical_pos = screen_physical_pos.to_logical(&self.window.window_info);
+
                 self.handler.on_event(
                     &mut crate::Window::new(Window { inner: &self.window }),
                     Event::Mouse(MouseEvent::CursorMoved {
                         position: logical_pos,
+                        screen_position: screen_logical_pos,
                         modifiers: key_mods(event.state),
                     }),
                 );
@@ -194,10 +198,13 @@ impl EventLoop {
                 // we generate a CursorMoved as well, so the mouse position from here isn't lost
                 let physical_pos = PhyPoint::new(event.event_x as i32, event.event_y as i32);
                 let logical_pos = physical_pos.to_logical(&self.window.window_info);
+                let screen_physical_pos = PhyPoint::new(event.root_x as i32, event.root_y as i32);
+                let screen_logical_pos = screen_physical_pos.to_logical(&self.window.window_info);
                 self.handler.on_event(
                     &mut crate::Window::new(Window { inner: &self.window }),
                     Event::Mouse(MouseEvent::CursorMoved {
                         position: logical_pos,
+                        screen_position: screen_logical_pos,
                         modifiers: key_mods(event.state),
                     }),
                 );