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Post WM_SETCURSOR after WM_ACTIVATE to workaround XAML island busy cursor #20448

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Post WM_SETCURSOR after WM_ACTIVATE to workaround XAML island busy cursor #20448

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9 changes: 9 additions & 0 deletions src/cascadia/WindowsTerminal/IslandWindow.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -518,6 +518,15 @@ void IslandWindow::_OnGetMinMaxInfo(const WPARAM /*wParam*/, const LPARAM lParam
const bool activated = LOWORD(wparam) != 0;
WindowActivated.raise(activated);

// GH#18662: After raising WindowActivated, XAML may be busy processing
// the activation (focus, layout, rendering). During this time, WM_SETCURSOR
// may go unanswered, causing Windows to show a busy cursor until the next
// mouse move. Post a WM_SETCURSOR to force re-evaluation once XAML is idle.
if (activated)
{
PostMessageW(GetHandle(), WM_SETCURSOR, 0, MAKELPARAM(HTCLIENT, WM_MOUSEMOVE));
}

if (_autoHideWindow && !activated)
{
if (_isQuakeWindow || _minimizeToNotificationArea)
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