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Fix negative delta scroll (#19573)

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This fixes the sign extension from 16 to 32 bit by casting
from the unsigned to the signed type first.

Closes #19391
Closes #19484
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penguin-sophist 2025-11-25 16:46:14 +01:00 committed by GitHub
parent 38d2fdad5f
commit fb75fb56c0
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src/cascadia/WindowsTerminal/IslandWindow.cpp
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@ -624,7 +624,7 @@ void IslandWindow::_OnGetMinMaxInfo(const WPARAM /*wParam*/, const LPARAM lParam
const auto scale = GetCurrentDpiScale(); const auto scale = GetCurrentDpiScale();
const winrt::Windows::Foundation::Point real{ relative.x / scale, relative.y / scale }; const winrt::Windows::Foundation::Point real{ relative.x / scale, relative.y / scale };
winrt::Microsoft::Terminal::Core::Point wheelDelta{ 0, static_cast<int32_t>(HIWORD(wparam)) }; winrt::Microsoft::Terminal::Core::Point wheelDelta{ 0, std::bit_cast<int16_t>(HIWORD(wparam)) };
if (message == WM_MOUSEHWHEEL) if (message == WM_MOUSEHWHEEL)
{ {
std::swap(wheelDelta.X, wheelDelta.Y); std::swap(wheelDelta.X, wheelDelta.Y);