`AnyClass::responds_to` delegates to `class_respondsToSelector`, a
function provided by the Objective-C runtime. However, at some point,
this began to return `false` for selectors referring to undocumented
cursors, despite the cursors remaining accessible via said selectors.
That this check fails prevents the cursors from being used.
We can instead send `respondsToSelector:` to the `NSCursor` class
itself. As an instance method, this is nominally impossible; however,
Apple grants an exemption[1] that permits class objects to perform
instance methods defined in the root class.
Checking for the undocumented cursors in this way gets them working
again, at least on macOS Sequoia 15.1.1.
[1]: https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ObjectiveC/Chapters/ocObjectsClasses.html#//apple_ref/doc/uid/TP30001163-CH11-TPXREF120
Events emitted by `flagsChanged:` cannot access
`charactersIgnoringModifiers`. We were previously doing this because we
were trying to re-use the `create_key_event` function, but that is unsuited
for this purpose, so I have separated the `flagsChanged:` logic out from it.
This implements basic iOS IME support (typing, backspace, support for emojis
etc but no autocomplete or copy / paste menu).
Co-authored-by: Mads Marquart <mads@marquart.dk>
Based on https://github.com/rust-windowing/winit/pull/3973, which should
be merged first.
There's an API to programmatically specify X11 screen id (override what
is determined from the `DISPLAY` env variable), but it doesn't work.
Seeting up X Server with 2 screens and calling `DISPLAY=:0
X11_SCREEN_ID=1 cargo run --example window` should be equivalent to
calling `DISPLAY=:0.1 cargo run --example window`
The latter works (and places the window on the correct screen), but the
former yields
`failed to create initial window: Os(OsError { line: 620, file:
"src/platform_impl/linux/x11/window.rs", error: X11Error(X11Error {
error_kind: Match, error_code: 8, sequence: 219, bad_value: 1319,
minor_opcode: 0, major_opcode: 1, extension_name: None, request_name:
Some("CreateWindow") }) })`
_Here `1319` is the root window id for screen 0, which doesn't match the
screen 1 that we request._
The problem is that we need to factor in the screen id when determining
the parent (root) window when not explicitly set. This patch does that.
---
Also: Extend the window example with X11_{SCREEN,VISUAL}_ID env variables
Previous version used [`SetTimer`] with `GetMessageW` for waiting.
The downside of UI timers like ones created by `SetTimer`,
is that they may be late by up to 15-16 ms.
To fix this behaviour, I added use of high resolution timers created by
[`CreateWaitableTimerExW`] with the flag
`CREATE_WAITABLE_TIMER_HIGH_RESOLUTION`.
In my previous experience, waiting on such timers have precision of
roundly 0.5 ms which is the best available on Windows at the moment. I
use [`MsgWaitForMultipleObjectsEx`] to wait simultaneously for both
timer and newly arriving events.
Unfortunately, high resolution timers are available only since Windows
10 1803. However:
1. Win 10 is already getting to the end of support, like all previous
versions, so it is OK to rely on APIs introduced in it;
2. I use `dwMilliseconds` parameter of `MsgWaitForMultipleObjectsEx` as
a fallback. It should perform not worse compared to waiting for
events from `SetTimer`.
I also refactored code to remove event dispatching from function
responsible for waiting for events. This provides more clear separations
of concern and avoids unnecessary duplication of dispatching logic.
After [review] from @rib, I also moved the waiting itself from
`wait_for_messages` method to separate function, so it is clearly seen
that `wait_for_messages` do 3 things: notify app that we about to wait,
wait, notify that we have new events.
I have tested behaviour using a egui app with Vulkan rendering with
`VK_PRESENT_MODE_IMMEDIATE_KHR`, and older version consistently have
twice less FPS than requested (e.g. 30 FPS when limit is 60 and 60 FPS
when limit is 120) while newer version works more correctly (almost
always 60 FPS when limit is 60, and only 5-10 frames missing when FPS is
set to 120 or more).
Fixes https://github.com/rust-windowing/winit/issues/1610
[`CreateWaitableTimerExW`]: https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-createwaitabletimerexw
[`MsgWaitForMultipleObjectsEx`]: https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-msgwaitformultipleobjectsex
[`SetTimer`]: https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-settimer
[review]: https://github.com/rust-windowing/winit/pull/3950#discussion_r1800184479
This also fixes macOS returning `None` in `Window::theme()` if no theme
override is set, instead it now returns the system theme.
MacOS and Wayland were the only ones working correctly according to the
documentation, which was an oversight. The documentation was "fixed"
now.
Fixes#3837.
Nothing wrong will happen if we ignore events when compositor is at
wrong, at least crashing because compositor is just _wrong_ probably is
not a great option.
Links: https://github.com/alacritty/alacritty/issues/8065
This new implementation uses:
- The NSAppearanceCustomization protocol for retrieving the appearance
of the window, instead of using the application-wide
`-[NSApplication effectiveAppearance]`.
- Key-Value observing for observing the `effectiveAppearance` to compute
the `ThemeChanged` event, instead of using the undocumented
`AppleInterfaceThemeChangedNotification` notification.
This also fixes `WindowBuilder::with_theme` not having any effect, and
the conversion between `Theme` and `NSAppearance` is made a bit more
robust.
* Use AppKit's internal queuing mechanisms
This allows events to be queued in a more consistent order, they're now
interleaved with events that we handle immediately (like redraw events),
instead of being handled afterwards.
* Only queue events if necessary
This makes the call stack / backtraces easier to understand whenever
possible, and generally improves upon the order in which events are
delivered.
This fixes an issue where the window glitched due to resize
when the user doesn't actually change the window, but macOS
function to update window size was still called.
When the user decides to use an older version of raw-window-handle,
through the rwh_04 or rwh_05 features, it makes sense to reexport the
crate so they don’t have to depend on it manually and can instead use
winit::raw_window_handle.
- Allow all gestures simultaneously recognized.
- Add PanGestureRecogniser with min/max number of touches.
- Fix sending delta values relative to Update instead to match macOS.
- Fix rotation gesture units from iOS to be in degrees instead of radians.
Co-authored-by: Mads Marquart <mads@marquart.dk>
Setting the background color changes how the window title bar appears,
which is something that the application should customize itself if it
wants this behaviour (and also, it wasn't set when calling
`set_transparent`, so the behaviour wasn't consistent).
On Windows, it is generally unsafe to use the HWND outside of the thread
that it originates from. In reality, the HWND is an index into a
thread-local table, so using it outside of the GUI thread can result in
another window being used instead, following by code unsoundness. This
is why the WindowHandle type is !Send. However, Window is Send and Sync,
which means we have to account for this.
Thus far the best solution seems to be to check if we are not in the GUI
thread. If we aren't, refuse the return the window handle.
For users who want to ensure the safety themselves, the unsafe API
was added.
Signed-off-by: John Nunley <dev@notgull.net>
