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Expose window HWND on Windows (mirrors apple_view() on macOS) #603

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Expose window HWND on Windows (mirrors apple_view() on macOS) #603

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1545556
expose HWND via window::windows_hwnd()
TheRedDeveloper Feb 17, 2026
1ebbd8a
Store HWND in NativeDisplayData, make get_window_hwnd pub(crate)
TheRedDeveloper Feb 18, 2026
2b90706
pass HWND in set_display, remove get_window_hwnd
TheRedDeveloper Feb 18, 2026
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9 changes: 9 additions & 0 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -99,7 +99,7 @@
}
/// This for now is Android specific since the process can continue running but the display
/// is restarted. We support reinitializing the display.
fn set_or_replace_display(display: native::NativeDisplayData) {

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function `set_or_replace_display` is never used

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function `set_or_replace_display` is never used

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function `set_or_replace_display` is never used

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function `set_or_replace_display` is never used

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function `set_or_replace_display` is never used

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function `set_or_replace_display` is never used

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function `set_or_replace_display` is never used
if let Some(m) = NATIVE_DISPLAY.get() {
// Replace existing display
*m.lock().unwrap() = display;
Expand Down Expand Up @@ -439,6 +439,15 @@
let d = native_display().lock().unwrap();
d.view_ctrl
}

/// Get the main window HWND as a raw pointer (`*mut c_void`).
///
/// Returns `null_mut()` if the window has not been created yet.
/// Only available on Windows.
#[cfg(target_os = "windows")]
pub fn windows_hwnd() -> *mut std::ffi::c_void {
crate::native_display().lock().unwrap().hwnd
}
}

#[derive(Debug, Copy, Clone, PartialEq, Hash, Eq)]
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9 changes: 7 additions & 2 deletions src/native.rs
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Expand Up @@ -24,16 +24,19 @@ pub(crate) struct NativeDisplayData {
pub dropped_files: DroppedFiles,
pub blocking_event_loop: bool,

#[cfg(target_os = "windows")]
pub hwnd: *mut std::ffi::c_void,

#[cfg(target_vendor = "apple")]
pub view: crate::native::apple::frameworks::ObjcId,
#[cfg(target_os = "ios")]
pub view_ctrl: crate::native::apple::frameworks::ObjcId,
#[cfg(target_vendor = "apple")]
pub gfx_api: crate::conf::AppleGfxApi,
}
#[cfg(target_vendor = "apple")]
#[cfg(any(target_vendor = "apple", target_os = "windows"))]
unsafe impl Send for NativeDisplayData {}
#[cfg(target_vendor = "apple")]
#[cfg(any(target_vendor = "apple", target_os = "windows"))]
unsafe impl Sync for NativeDisplayData {}

impl NativeDisplayData {
Expand All @@ -56,6 +59,8 @@ impl NativeDisplayData {
clipboard,
dropped_files: Default::default(),
blocking_event_loop: false,
#[cfg(target_os = "windows")]
hwnd: std::ptr::null_mut(),
#[cfg(target_vendor = "apple")]
gfx_api: crate::conf::AppleGfxApi::OpenGl,
#[cfg(target_vendor = "apple")]
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1 change: 1 addition & 0 deletions src/native/windows.rs
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Expand Up @@ -250,7 +250,7 @@
if unsafe { GetClientRect(self.wnd, &mut rect as *mut _ as _) } != 0 {
let mut new_rect = rect;
new_rect.right = new_rect.right - new_rect.left + new_x as i32;
new_rect.bottom = new_rect.bottom - new_rect.top + new_y as i32;

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unsafe {
SetWindowPos(
self.wnd,
Expand Down Expand Up @@ -1203,6 +1203,7 @@
high_dpi: conf.high_dpi,
dpi_scale: display.window_scale,
blocking_event_loop: conf.platform.blocking_event_loop,
hwnd: wnd as *mut std::ffi::c_void,
..NativeDisplayData::new(conf.window_width, conf.window_height, tx, clipboard)
});

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