sola/qwindowkit.git

			@@ -204,51 +204,6 @@
			moveWindowToMonitor(hwnd, activeMonitor);
			}

			static void syncPaintEventWithDwm() {
			// No need to sync with DWM if DWM composition is disabled.
			if (!isDwmCompositionEnabled()) {
			return;
			}
			const DynamicApis &apis = DynamicApis::instance();
			// Dirty hack to workaround the resize flicker caused by DWM.
			LARGE_INTEGER freq{};
			::QueryPerformanceFrequency(&freq);
			TIMECAPS tc{};
			apis.ptimeGetDevCaps(&tc, sizeof(tc));
			const UINT ms_granularity = tc.wPeriodMin;
			apis.ptimeBeginPeriod(ms_granularity);
			LARGE_INTEGER now0{};
			::QueryPerformanceCounter(&now0);
			// ask DWM where the vertical blank falls
			DWM_TIMING_INFO dti{};
			dti.cbSize = sizeof(dti);
			apis.pDwmGetCompositionTimingInfo(nullptr, &dti);
			LARGE_INTEGER now1{};
			::QueryPerformanceCounter(&now1);
			// - DWM told us about SOME vertical blank
			// - past or future, possibly many frames away
			// - convert that into the NEXT vertical blank
			const auto period = qreal(dti.qpcRefreshPeriod);
			const auto dt = qreal(dti.qpcVBlank - now1.QuadPart);
			const qreal ratio = (dt / period);
			auto w = qreal(0);
			auto m = qreal(0);
			if ((dt > qreal(0)) \|\| qFuzzyIsNull(dt)) {
			w = ratio;
			} else {
			// reach back to previous period
			// - so m represents consistent position within phase
			w = (ratio - qreal(1));
			}
			m = (dt - (period * w));
			if ((m < qreal(0)) \|\| qFuzzyCompare(m, period) \|\| (m > period)) {
			return;
			}
			const qreal m_ms = (qreal(1000) * m / qreal(freq.QuadPart));
			::Sleep(static_cast<DWORD>(std::round(m_ms)));
			apis.ptimeEndPeriod(ms_granularity);
			}

			// Returns false if the menu is canceled
			static bool showSystemMenu_sys(HWND hWnd, const POINT &pos, const bool selectFirstEntry,
			const bool fixedSize) {
			@@ -938,8 +893,39 @@
			Q_UNUSED(oldAttribute)

			const auto hwnd = reinterpret_cast<HWND>(m_windowId);
			Q_ASSERT(hwnd);
			if (!hwnd) {
			return false;
			}

			const DynamicApis &apis = DynamicApis::instance();
			static constexpr const MARGINS extendedMargins = {-1, -1, -1, -1};
			const auto &extendMargins = [this, &apis, hwnd]() {
			// For some unknown reason, the window background is totally black when the host object
			// is a QWidget. And extending the window frame into the client area seems to fix it
			// magically.
			// We don't need the following HACK for QtQuick windows.
			if (!m_host->isWidgetType()) {
			return;
			}
			// After many times of trying, we found that the Acrylic/Mica/Mica Alt background
			// only appears on the native Win32 window's background, so naturally we want to
			// extend the window frame into the whole client area to be able to let the special
			// material fill the whole window. Previously we are using negative margins because
			// it's widely known that using negative margins will let the window frame fill
			// the whole window and that's indeed what we wanted to do, however, later we found
			// that doing so is causing issues. When the user enabled the "show accent color on
			// window title bar and borders" option on system personalize settings, a 30px bar
			// would appear on window top. It has the same color with the system accent color.
			// Actually it's the original title bar we've already hidden, and it magically
			// appears again when we use negative margins to extend the window frame. And again
			// after some experiments, I found that the title bar won't appear if we don't extend
			// from the top side. In the end I found that we only need to extend from the left
			// side if we extend long enough. In this way we can see the special material even
			// when the host object is a QWidget and the title bar still remain hidden. But even
			// though this solution seems perfect, I really don't know why it works.
			static constexpr const MARGINS margins = {65536, 0, 0, 0};
			apis.pDwmExtendFrameIntoClientArea(hwnd, &margins);
			};
			const auto &restoreMargins = [this, &apis, hwnd]() {
			auto margins = qmargins2margins(
			m_windowAttributes.value(QStringLiteral("extra-margins")).value<QMargins>());
			@@ -975,9 +961,7 @@
			return false;
			}
			if (attribute.toBool()) {
			// We need to extend the window frame into the whole client area to be able
			// to see the blurred window background.
			apis.pDwmExtendFrameIntoClientArea(hwnd, &extendedMargins);
			extendMargins();
			if (isWin1122H2OrGreater()) {
			// Use official DWM API to enable Mica, available since Windows 11 22H2
			// (10.0.22621).
			@@ -1009,9 +993,7 @@
			return false;
			}
			if (attribute.toBool()) {
			// We need to extend the window frame into the whole client area to be able
			// to see the blurred window background.
			apis.pDwmExtendFrameIntoClientArea(hwnd, &extendedMargins);
			extendMargins();
			// Use official DWM API to enable Mica Alt, available since Windows 11 22H2
			// (10.0.22621).
			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_TABBEDWINDOW;
			@@ -1031,9 +1013,7 @@
			return false;
			}
			if (attribute.toBool()) {
			// We need to extend the window frame into the whole client area to be able
			// to see the blurred window background.
			apis.pDwmExtendFrameIntoClientArea(hwnd, &extendedMargins);
			extendMargins();

			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_TRANSIENTWINDOW;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
			@@ -1074,9 +1054,9 @@
			}

			if (key == QStringLiteral("dwm-blur")) {
			if (attribute.toBool()) {
			// We can't extend the window frame for this effect.
			// Extending window frame would break this effect for some unknown reason.
			restoreMargins();
			if (attribute.toBool()) {
			if (isWin8OrGreater()) {
			ACCENT_POLICY policy{};
			policy.dwAccentState = ACCENT_ENABLE_BLURBEHIND;
			@@ -2157,8 +2137,6 @@
			}
			}
			}
			// We should call this function only before the function returns.
			syncPaintEventWithDwm();
			// By returning WVR_REDRAW we can make the window resizing look
			// less broken. But we must return 0 if wParam is FALSE, according to Microsoft
			// Docs.