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Prevent the event loop from pausing when entering modal loop (eventloop-2.0) (#839)

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* Prevent the event loop from pausing after entering modal loop

After clicking the window title bar or border (for a drag or resize),
the event loop pauses until the mouse is moved. This change relays
the WM_NCLBUTTONDOWN message to the dummy window where it queues
a redraw and consumes the message. This effectively jumpstarts
the modal loop and it continues to fire draw requests.

* Handle WM_NCLBUTTONDOWN in public_window_callback instead of relaying.

Relaying the WM_NCLBUTTONDOWN message to the modal window turned out
to be unnecessary.
This commit is contained in:
aloucks 2019-04-14 11:48:31 -04:00 committed by Osspial
parent 2ead1c1c59
commit 2253565db5
1 changed files with 14 additions and 0 deletions
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14
src/platform_impl/windows/event_loop.rs
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@ -799,6 +799,20 @@ unsafe extern "system" fn public_window_callback<T>(
commctrl::DefSubclassProc(window, msg, wparam, lparam)
},
winuser::WM_NCLBUTTONDOWN => {
// jumpstart the modal loop
winuser::RedrawWindow(
window,
ptr::null(),
ptr::null_mut(),
winuser::RDW_INTERNALPAINT
);
if wparam == winuser::HTCAPTION as _ {
winuser::PostMessageW(window, winuser::WM_MOUSEMOVE, 0, 0);
}
commctrl::DefSubclassProc(window, msg, wparam, lparam)
},
winuser::WM_CLOSE => {
use event::WindowEvent::CloseRequested;
subclass_input.send_event(Event::WindowEvent {