Various cursors cannot be displayed on macOS #3724
Comments
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Can reproduce on macOS 14.4.1 and a checkout of 3a624e0 --
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Can reproduce on macOS Sequoia 15.1 on 0.30.5. Is there any hope to see this addressed? I'll be available to help test alternative implementations. As stated here: https://stackoverflow.com/questions/10733228/native-osx-lion-resize-cursor-for-custom-nswindow-or-nsview/46635398#46635398 WebKit contains images that look exactly the same as the cursors used by the system, maybe we could replace them with custom cursors for the macOS platform? |
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The frame resize, column resize, row resize, and zoom cursors became public API in macOS Sequoia (15.0): 
These are accessible via:
These don't seem to be exposed in Though, strangely enough, trying to access these cursors privately via Swift still works:
Digging into this more, winit uses winit/src/platform_impl/apple/appkit/cursor.rs Lines 70 to 76 in e47081e This invokes the Apple's guidance seems to generally recommend the latter as well:
We can send that message from Rust: use objc2::{msg_send, sel, ClassType};
use objc2_app_kit::*;
fn main() {
let private_cursor_sel = sel!(_windowResizeNorthEastCursor);
println!(
"responds via class_respondsToSelector? {}",
NSCursor::class().responds_to(private_cursor_sel)
);
let responds: bool =
unsafe { msg_send![NSCursor::class(), respondsToSelector: private_cursor_sel] };
println!("responds via -[NSObject respondsToSelector:]? {}", responds);
}Running this code on my system (currently macOS 15.1.1, 24B91) yields: FWICT, there doesn't seem to be a non- From the relevant section in Apple's documentation archive (there's a relevant StackOverflow question, too):
So, despite This is probably what |
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Thanks for the detailed investigation! You are right that we should be using And yeah, they're not exposed in the current version of I'd accept a PR implementing this ;) |
@madsmtm Thanks for the insight. I'm interested in helping! Just to clarify, by "this" do you mean sending diff --git a/src/platform_impl/apple/appkit/cursor.rs b/src/platform_impl/apple/appkit/cursor.rs
index 70a36e11..b8befe11 100644
--- a/src/platform_impl/apple/appkit/cursor.rs
+++ b/src/platform_impl/apple/appkit/cursor.rs
@@ -4,7 +4,7 @@ use std::sync::OnceLock;
use objc2::rc::Retained;
use objc2::runtime::Sel;
-use objc2::{msg_send_id, sel, ClassType};
+use objc2::{msg_send, msg_send_id, sel, ClassType};
use objc2_app_kit::{NSBitmapImageRep, NSCursor, NSDeviceRGBColorSpace, NSImage};
use objc2_foundation::{
ns_string, NSData, NSDictionary, NSNumber, NSObject, NSObjectProtocol, NSPoint, NSSize,
@@ -67,7 +67,7 @@ pub(crate) fn default_cursor() -> Retained<NSCursor> {
unsafe fn try_cursor_from_selector(sel: Sel) -> Option<Retained<NSCursor>> {
let cls = NSCursor::class();
- if cls.responds_to(sel) {
+ if msg_send![cls, respondsToSelector: sel] {
let cursor: Retained<NSCursor> = unsafe { msg_send_id![cls, performSelector: sel] };
Some(cursor)
} else { |
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The answer is yes to both ;) |
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I've opened #4034 for using the documented cursors |
Description
Running the
windowexample and pressing CTRL+C to cycle through the available cursors reveals that not all cursors can be displayed.When a cursor cannot be displayed the following warning is emitted and the cursor reverts to the default cursor.
Here is the log of relevant events from the window example:
macOS version
Winit version
0.30.0
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