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On Windows, fix RedrawRequested delivery

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When calling `Window::request_redraw` from the `RedrawRequested`
handler the `RedrawWindow` won't result in `WM_PAINT` being delivered
due since user callback is run before `DefWindowProcW` is called.

Track whether the user called `Window::request_redraw` and ask for
`RedrawWindow` after running the said function during `WM_PAINT`
handling.

Fixes #3150.
This commit is contained in:
Kirill Chibisov 2023-10-20 14:52:01 +04:00 • committed by GitHub
parent c0db53a516
commit 98b3508aca
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5 changed files with 24 additions and 9 deletions
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3
src/window.rs
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@ -585,8 +585,7 @@ impl Window {
/// ## Platform-specific
///
/// - **Windows** This API uses `RedrawWindow` to request a `WM_PAINT` message and `RedrawRequested`
/// is emitted in sync with any `WM_PAINT` messages. **Calling this method from `RedrawRequested`
/// event handler won't produce a `RedrawRequested` event**.
/// is emitted in sync with any `WM_PAINT` messages.
/// - **iOS:** Can only be called on the main thread.
/// - **Wayland:** The events are aligned with the frame callbacks when [`Window::pre_present_notify`]
/// is used.