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Add option to make window "always on top" (#528)

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* macOS: always_on_top

* Windows: always_on_top

* X11: always_on_top

* Stub set_always_on_top on other platforms
This commit is contained in:
Francesca Frangipane 2018-05-20 10:24:05 -04:00 • committed by GitHub
parent f6d26df64d
commit f51f7c0ca8
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11 changed files with 161 additions and 4 deletions
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38
src/platform/windows/window.rs
View file

@ -650,6 +650,38 @@ impl Window {
}
}
#[inline]
pub fn set_always_on_top(&self, always_on_top: bool) {
if let Ok(mut window_state) = self.window_state.lock() {
if window_state.attributes.always_on_top == always_on_top {
return;
}
let window = self.window.clone();
self.events_loop_proxy.execute_in_thread(move |_| {
let insert_after = if always_on_top {
winuser::HWND_TOPMOST
} else {
winuser::HWND_NOTOPMOST
};
unsafe {
winuser::SetWindowPos(
window.0,
insert_after,
0,
0,
0,
0,
winuser::SWP_ASYNCWINDOWPOS | winuser::SWP_NOMOVE | winuser::SWP_NOSIZE,
);
winuser::UpdateWindow(window.0);
}
});
window_state.attributes.always_on_top = always_on_top;
}
}
#[inline]
pub fn get_current_monitor(&self) -> RootMonitorId {
RootMonitorId {
@ -765,7 +797,7 @@ unsafe fn init(
};
// computing the style and extended style of the window
let (ex_style, style) = if !window.decorations {
let (mut ex_style, style) = if !window.decorations {
(winuser::WS_EX_APPWINDOW,
//winapi::WS_POPUP is incompatible with winapi::WS_CHILD
if pl_attribs.parent.is_some() {
@ -780,6 +812,10 @@ unsafe fn init(
winuser::WS_OVERLAPPEDWINDOW | winuser::WS_CLIPSIBLINGS | winuser::WS_CLIPCHILDREN)
};
if window.always_on_top {
ex_style |= winuser::WS_EX_TOPMOST;
}
// adjusting the window coordinates using the style
winuser::AdjustWindowRectEx(&mut rect, style, 0, ex_style);