sola/qwindowkit.git

			@@ -1,14 +1,21 @@
			// Copyright (C) 2023-2024 Stdware Collections (https://www.github.com/stdware)
			// Copyright (C) 2021-2023 wangwenx190 (Yuhang Zhao)
			// SPDX-License-Identifier: Apache-2.0

			#include "win32windowcontext_p.h"

			#include <optional>

			#include <QtCore/QAbstractEventDispatcher>
			#include <QtCore/QDateTime>
			#include <QtCore/QHash>
			#include <QtCore/QScopeGuard>
			#include <QtCore/QTimer>
			#include <QtGui/QGuiApplication>
			#include <QtGui/QPainter>
			#include <QtGui/QPalette>
			#include <QtGui/QStyleHints>

			#include <QtGui/qpa/qwindowsysteminterface.h>

			#include <QtGui/private/qhighdpiscaling_p.h>
			#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
			@@ -21,12 +28,308 @@
			# include <QtGui/qpa/qplatformwindow_p.h>
			#endif

			#include <QWKCore/qwkconfig.h>

			#include "qwkglobal_p.h"
			#include "qwkwindowsextra_p.h"

			#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
			Q_DECLARE_METATYPE(QMargins)
			#endif
			static QHash<int, const wchar_t *> xmsgHash = //
			{
			//
			{0, L"WM_NULL" },
			{1, L"WM_CREATE" },
			{2, L"WM_DESTROY" },
			{3, L"WM_MOVE" },
			{5, L"WM_SIZE" },
			{6, L"WM_ACTIVATE" },
			{7, L"WM_SETFOCUS" },
			{8, L"WM_KILLFOCUS" },
			{10, L"WM_ENABLE" },
			{11, L"WM_SETREDRAW" },
			{12, L"WM_SETTEXT" },
			{13, L"WM_GETTEXT" },
			{14, L"WM_GETTEXTLENGTH" },
			{15, L"WM_PAINT" },
			{16, L"WM_CLOSE" },
			{17, L"WM_QUERYENDSESSION" },
			{18, L"WM_QUIT" },
			{19, L"WM_QUERYOPEN" },
			{20, L"WM_ERASEBKGND" },
			{21, L"WM_SYSCOLORCHANGE" },
			{22, L"WM_ENDSESSION" },
			{24, L"WM_SHOWWINDOW" },
			{25, L"WM_CTLCOLOR" },
			{26, L"WM_WININICHANGE" },
			{27, L"WM_DEVMODECHANGE" },
			{28, L"WM_ACTIVATEAPP" },
			{29, L"WM_FONTCHANGE" },
			{30, L"WM_TIMECHANGE" },
			{31, L"WM_CANCELMODE" },
			{32, L"WM_SETCURSOR" },
			{33, L"WM_MOUSEACTIVATE" },
			{34, L"WM_CHILDACTIVATE" },
			{35, L"WM_QUEUESYNC" },
			{36, L"WM_GETMINMAXINFO" },
			{38, L"WM_PAINTICON" },
			{39, L"WM_ICONERASEBKGND" },
			{40, L"WM_NEXTDLGCTL" },
			{42, L"WM_SPOOLERSTATUS" },
			{43, L"WM_DRAWITEM" },
			{44, L"WM_MEASUREITEM" },
			{45, L"WM_DELETEITEM" },
			{46, L"WM_VKEYTOITEM" },
			{47, L"WM_CHARTOITEM" },
			{48, L"WM_SETFONT" },
			{49, L"WM_GETFONT" },
			{50, L"WM_SETHOTKEY" },
			{51, L"WM_GETHOTKEY" },
			{55, L"WM_QUERYDRAGICON" },
			{57, L"WM_COMPAREITEM" },
			{61, L"WM_GETOBJECT" },
			{65, L"WM_COMPACTING" },
			{68, L"WM_COMMNOTIFY" },
			{70, L"WM_WINDOWPOSCHANGING" },
			{71, L"WM_WINDOWPOSCHANGED" },
			{72, L"WM_POWER" },
			{73, L"WM_COPYGLOBALDATA" },
			{74, L"WM_COPYDATA" },
			{75, L"WM_CANCELJOURNAL" },
			{78, L"WM_NOTIFY" },
			{80, L"WM_INPUTLANGCHANGEREQUEST"},
			{81, L"WM_INPUTLANGCHANGE" },
			{82, L"WM_TCARD" },
			{83, L"WM_HELP" },
			{84, L"WM_USERCHANGED" },
			{85, L"WM_NOTIFYFORMAT" },
			{123, L"WM_CONTEXTMENU" },
			{124, L"WM_STYLECHANGING" },
			{125, L"WM_STYLECHANGED" },
			{126, L"WM_DISPLAYCHANGE" },
			{127, L"WM_GETICON" },
			{128, L"WM_SETICON" },
			{129, L"WM_NCCREATE" },
			{130, L"WM_NCDESTROY" },
			{131, L"WM_NCCALCSIZE" },
			{132, L"WM_NCHITTEST" },
			{133, L"WM_NCPAINT" },
			{134, L"WM_NCACTIVATE" },
			{135, L"WM_GETDLGCODE" },
			{136, L"WM_SYNCPAINT" },
			{160, L"WM_NCMOUSEMOVE" },
			{161, L"WM_NCLBUTTONDOWN" },
			{162, L"WM_NCLBUTTONUP" },
			{163, L"WM_NCLBUTTONDBLCLK" },
			{164, L"WM_NCRBUTTONDOWN" },
			{165, L"WM_NCRBUTTONUP" },
			{166, L"WM_NCRBUTTONDBLCLK" },
			{167, L"WM_NCMBUTTONDOWN" },
			{168, L"WM_NCMBUTTONUP" },
			{169, L"WM_NCMBUTTONDBLCLK" },
			{171, L"WM_NCXBUTTONDOWN" },
			{172, L"WM_NCXBUTTONUP" },
			{173, L"WM_NCXBUTTONDBLCLK" },
			{176, L"EM_GETSEL" },
			{177, L"EM_SETSEL" },
			{178, L"EM_GETRECT" },
			{179, L"EM_SETRECT" },
			{180, L"EM_SETRECTNP" },
			{181, L"EM_SCROLL" },
			{182, L"EM_LINESCROLL" },
			{183, L"EM_SCROLLCARET" },
			{185, L"EM_GETMODIFY" },
			{187, L"EM_SETMODIFY" },
			{188, L"EM_GETLINECOUNT" },
			{189, L"EM_LINEINDEX" },
			{190, L"EM_SETHANDLE" },
			{191, L"EM_GETHANDLE" },
			{192, L"EM_GETTHUMB" },
			{193, L"EM_LINELENGTH" },
			{194, L"EM_REPLACESEL" },
			{195, L"EM_SETFONT" },
			{196, L"EM_GETLINE" },
			{197, L"EM_LIMITTEXT" },
			{197, L"EM_SETLIMITTEXT" },
			{198, L"EM_CANUNDO" },
			{199, L"EM_UNDO" },
			{200, L"EM_FMTLINES" },
			{201, L"EM_LINEFROMCHAR" },
			{202, L"EM_SETWORDBREAK" },
			{203, L"EM_SETTABSTOPS" },
			{204, L"EM_SETPASSWORDCHAR" },
			{205, L"EM_EMPTYUNDOBUFFER" },
			{206, L"EM_GETFIRSTVISIBLELINE" },
			{207, L"EM_SETREADONLY" },
			{209, L"EM_SETWORDBREAKPROC" },
			{209, L"EM_GETWORDBREAKPROC" },
			{210, L"EM_GETPASSWORDCHAR" },
			{211, L"EM_SETMARGINS" },
			{212, L"EM_GETMARGINS" },
			{213, L"EM_GETLIMITTEXT" },
			{214, L"EM_POSFROMCHAR" },
			{215, L"EM_CHARFROMPOS" },
			{216, L"EM_SETIMESTATUS" },
			{217, L"EM_GETIMESTATUS" },
			{224, L"SBM_SETPOS" },
			{225, L"SBM_GETPOS" },
			{226, L"SBM_SETRANGE" },
			{227, L"SBM_GETRANGE" },
			{228, L"SBM_ENABLE_ARROWS" },
			{230, L"SBM_SETRANGEREDRAW" },
			{233, L"SBM_SETSCROLLINFO" },
			{234, L"SBM_GETSCROLLINFO" },
			{235, L"SBM_GETSCROLLBARINFO" },
			{240, L"BM_GETCHECK" },
			{241, L"BM_SETCHECK" },
			{242, L"BM_GETSTATE" },
			{243, L"BM_SETSTATE" },
			{244, L"BM_SETSTYLE" },
			{245, L"BM_CLICK" },
			{246, L"BM_GETIMAGE" },
			{247, L"BM_SETIMAGE" },
			{248, L"BM_SETDONTCLICK" },
			{255, L"WM_INPUT" },
			{256, L"WM_KEYDOWN" },
			{256, L"WM_KEYFIRST" },
			{257, L"WM_KEYUP" },
			{258, L"WM_CHAR" },
			{259, L"WM_DEADCHAR" },
			{260, L"WM_SYSKEYDOWN" },
			{261, L"WM_SYSKEYUP" },
			{262, L"WM_SYSCHAR" },
			{263, L"WM_SYSDEADCHAR" },
			{264, L"WM_KEYLAST" },
			{265, L"WM_UNICHAR" },
			{265, L"WM_WNT_CONVERTREQUESTEX" },
			{266, L"WM_CONVERTREQUEST" },
			{267, L"WM_CONVERTRESULT" },
			{268, L"WM_INTERIM" },
			{269, L"WM_IME_STARTCOMPOSITION" },
			{270, L"WM_IME_ENDCOMPOSITION" },
			{271, L"WM_IME_COMPOSITION" },
			{271, L"WM_IME_KEYLAST" },
			{272, L"WM_INITDIALOG" },
			{273, L"WM_COMMAND" },
			{274, L"WM_SYSCOMMAND" },
			{275, L"WM_TIMER" },
			{276, L"WM_HSCROLL" },
			{277, L"WM_VSCROLL" },
			{278, L"WM_INITMENU" },
			{279, L"WM_INITMENUPOPUP" },
			{280, L"WM_SYSTIMER" },
			{287, L"WM_MENUSELECT" },
			{288, L"WM_MENUCHAR" },
			{289, L"WM_ENTERIDLE" },
			{290, L"WM_MENURBUTTONUP" },
			{291, L"WM_MENUDRAG" },
			{292, L"WM_MENUGETOBJECT" },
			{293, L"WM_UNINITMENUPOPUP" },
			{294, L"WM_MENUCOMMAND" },
			{295, L"WM_CHANGEUISTATE" },
			{296, L"WM_UPDATEUISTATE" },
			{297, L"WM_QUERYUISTATE" },
			{306, L"WM_CTLCOLORMSGBOX" },
			{307, L"WM_CTLCOLOREDIT" },
			{308, L"WM_CTLCOLORLISTBOX" },
			{309, L"WM_CTLCOLORBTN" },
			{310, L"WM_CTLCOLORDLG" },
			{311, L"WM_CTLCOLORSCROLLBAR" },
			{312, L"WM_CTLCOLORSTATIC" },
			{512, L"WM_MOUSEFIRST" },
			{512, L"WM_MOUSEMOVE" },
			{513, L"WM_LBUTTONDOWN" },
			{514, L"WM_LBUTTONUP" },
			{515, L"WM_LBUTTONDBLCLK" },
			{516, L"WM_RBUTTONDOWN" },
			{517, L"WM_RBUTTONUP" },
			{518, L"WM_RBUTTONDBLCLK" },
			{519, L"WM_MBUTTONDOWN" },
			{520, L"WM_MBUTTONUP" },
			{521, L"WM_MBUTTONDBLCLK" },
			{521, L"WM_MOUSELAST" },
			{522, L"WM_MOUSEWHEEL" },
			{523, L"WM_XBUTTONDOWN" },
			{524, L"WM_XBUTTONUP" },
			{525, L"WM_XBUTTONDBLCLK" },
			{528, L"WM_PARENTNOTIFY" },
			{529, L"WM_ENTERMENULOOP" },
			{530, L"WM_EXITMENULOOP" },
			{531, L"WM_NEXTMENU" },
			{532, L"WM_SIZING" },
			{533, L"WM_CAPTURECHANGED" },
			{534, L"WM_MOVING" },
			{536, L"WM_POWERBROADCAST" },
			{537, L"WM_DEVICECHANGE" },
			{544, L"WM_MDICREATE" },
			{545, L"WM_MDIDESTROY" },
			{546, L"WM_MDIACTIVATE" },
			{547, L"WM_MDIRESTORE" },
			{548, L"WM_MDINEXT" },
			{549, L"WM_MDIMAXIMIZE" },
			{550, L"WM_MDITILE" },
			{551, L"WM_MDICASCADE" },
			{552, L"WM_MDIICONARRANGE" },
			{553, L"WM_MDIGETACTIVE" },
			{560, L"WM_MDISETMENU" },
			{561, L"WM_ENTERSIZEMOVE" },
			{562, L"WM_EXITSIZEMOVE" },
			{563, L"WM_DROPFILES" },
			{564, L"WM_MDIREFRESHMENU" },
			{640, L"WM_IME_REPORT" },
			{641, L"WM_IME_SETCONTEXT" },
			{642, L"WM_IME_NOTIFY" },
			{643, L"WM_IME_CONTROL" },
			{644, L"WM_IME_COMPOSITIONFULL" },
			{645, L"WM_IME_SELECT" },
			{646, L"WM_IME_CHAR" },
			{648, L"WM_IME_REQUEST" },
			{656, L"WM_IMEKEYDOWN" },
			{656, L"WM_IME_KEYDOWN" },
			{657, L"WM_IMEKEYUP" },
			{657, L"WM_IME_KEYUP" },
			{672, L"WM_NCMOUSEHOVER" },
			{673, L"WM_MOUSEHOVER" },
			{674, L"WM_NCMOUSELEAVE" },
			{675, L"WM_MOUSELEAVE" },
			{768, L"WM_CUT" },
			{769, L"WM_COPY" },
			{770, L"WM_PASTE" },
			{771, L"WM_CLEAR" },
			{772, L"WM_UNDO" },
			{773, L"WM_RENDERFORMAT" },
			{774, L"WM_RENDERALLFORMATS" },
			{775, L"WM_DESTROYCLIPBOARD" },
			{776, L"WM_DRAWCLIPBOARD" },
			{777, L"WM_PAINTCLIPBOARD" },
			{778, L"WM_VSCROLLCLIPBOARD" },
			{779, L"WM_SIZECLIPBOARD" },
			{780, L"WM_ASKCBFORMATNAME" },
			{781, L"WM_CHANGECBCHAIN" },
			{782, L"WM_HSCROLLCLIPBOARD" },
			{783, L"WM_QUERYNEWPALETTE" },
			{784, L"WM_PALETTEISCHANGING" },
			{785, L"WM_PALETTECHANGED" },
			{786, L"WM_HOTKEY" },
			{791, L"WM_PRINT" },
			{792, L"WM_PRINTCLIENT" },
			{793, L"WM_APPCOMMAND" },
			{856, L"WM_HANDHELDFIRST" },
			{863, L"WM_HANDHELDLAST" },
			{864, L"WM_AFXFIRST" },
			{895, L"WM_AFXLAST" },
			{896, L"WM_PENWINFIRST" },
			{897, L"WM_RCRESULT" },
			{898, L"WM_HOOKRCRESULT" },
			{899, L"WM_GLOBALRCCHANGE" },
			{899, L"WM_PENMISCINFO" },
			{900, L"WM_SKB" },
			{901, L"WM_HEDITCTL" },
			{901, L"WM_PENCTL" },
			{902, L"WM_PENMISC" },
			{903, L"WM_CTLINIT" },
			{904, L"WM_PENEVENT" },
			{911, L"WM_PENWINLAST" },
			{1024, L"WM_USER" },
			};

			namespace QWK {

			@@ -47,59 +350,25 @@
			// Original Qt window proc function
			static WNDPROC g_qtWindowProc = nullptr;

			static inline bool
			#if !QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDERS)
			constexpr
			#endif

			isSystemBorderEnabled() {
			return
			#if QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDERS)
			isWin10OrGreater()
			#else
			false
			#endif
			;
			}

			static inline void triggerFrameChange(HWND hwnd) {
			::SetWindowPos(hwnd, nullptr, 0, 0, 0, 0,
			SWP_NOACTIVATE \| SWP_NOMOVE \| SWP_NOSIZE \| SWP_NOZORDER \| SWP_NOOWNERZORDER \|
			SWP_FRAMECHANGED);
			}

			static inline quint32 getDpiForWindow(HWND hwnd) {
			const DynamicApis &apis = DynamicApis::instance();
			if (apis.pGetDpiForWindow) { // Win10
			return apis.pGetDpiForWindow(hwnd);
			} else if (apis.pGetDpiForMonitor) { // Win8.1
			HMONITOR monitor = ::MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
			UINT dpiX{0};
			UINT dpiY{0};
			apis.pGetDpiForMonitor(monitor, MDT_EFFECTIVE_DPI, &dpiX, &dpiY);
			return dpiX;
			} else { // Win2K
			HDC hdc = ::GetDC(nullptr);
			const int dpiX = ::GetDeviceCaps(hdc, LOGPIXELSX);
			// const int dpiY = ::GetDeviceCaps(hdc, LOGPIXELSY);
			::ReleaseDC(nullptr, hdc);
			return quint32(dpiX);
			}
			}

			static inline quint32 getSystemMetricsForDpi(int index, quint32 dpi) {
			const DynamicApis &apis = DynamicApis::instance();
			if (apis.pGetSystemMetricsForDpi) {
			return ::GetSystemMetricsForDpi(index, dpi);
			}
			return ::GetSystemMetrics(index);
			}

			static inline quint32 getWindowFrameBorderThickness(HWND hwnd) {
			const DynamicApis &apis = DynamicApis::instance();
			if (UINT result = 0; SUCCEEDED(apis.pDwmGetWindowAttribute(
			hwnd, _DWMWA_VISIBLE_FRAME_BORDER_THICKNESS, &result, sizeof(result)))) {
			return result;
			}
			return getSystemMetricsForDpi(SM_CXBORDER, getDpiForWindow(hwnd));
			}

			static inline quint32 getResizeBorderThickness(HWND hwnd) {
			const quint32 dpi = getDpiForWindow(hwnd);
			return getSystemMetricsForDpi(SM_CXSIZEFRAME, dpi) +
			getSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi);
			}

			static inline quint32 getTitleBarHeight(HWND hwnd) {
			const quint32 dpi = getDpiForWindow(hwnd);
			return getSystemMetricsForDpi(SM_CYCAPTION, dpi) +
			getSystemMetricsForDpi(SM_CXSIZEFRAME, dpi) +
			getSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi);
			}

			static void setInternalWindowFrameMargins(QWindow *window, const QMargins &margins) {
			@@ -128,18 +397,6 @@
			monitorInfo.cbSize = sizeof(monitorInfo);
			::GetMonitorInfoW(monitor, &monitorInfo);
			return monitorInfo;
			}

			static inline void moveWindowToDesktopCenter(HWND hwnd) {
			MONITORINFOEXW monitorInfo = getMonitorForWindow(hwnd);
			RECT windowRect{};
			::GetWindowRect(hwnd, &windowRect);
			const auto newX = monitorInfo.rcMonitor.left +
			(RECT_WIDTH(monitorInfo.rcMonitor) - RECT_WIDTH(windowRect)) / 2;
			const auto newY = monitorInfo.rcMonitor.top +
			(RECT_HEIGHT(monitorInfo.rcMonitor) - RECT_HEIGHT(windowRect)) / 2;
			::SetWindowPos(hwnd, nullptr, newX, newY, 0, 0,
			SWP_NOACTIVATE \| SWP_NOSIZE \| SWP_NOZORDER \| SWP_NOOWNERZORDER);
			}

			static inline void moveWindowToMonitor(HWND hwnd, const MONITORINFOEXW &activeMonitor) {
			@@ -197,7 +454,7 @@
			[[maybe_unused]] const auto &cleaner =
			qScopeGuard([windowThreadProcessId, currentThreadId]() {
			::AttachThreadInput(windowThreadProcessId, currentThreadId, FALSE); //
			});
			}); // TODO: Remove it

			::BringWindowToTop(hwnd);
			// Activate the window too. This will force us to the virtual desktop this
			@@ -274,14 +531,15 @@
			apis.ptimeEndPeriod(ms_granularity);
			}

			static void showSystemMenu2(HWND hWnd, const POINT &pos, const bool selectFirstEntry,
			const bool fixedSize) {
			// Returns false if the menu is canceled
			static bool showSystemMenu_sys(HWND hWnd, const POINT &pos, const bool selectFirstEntry,
			const bool fixedSize) {
			HMENU hMenu = ::GetSystemMenu(hWnd, FALSE);
			if (!hMenu) {
			// The corresponding window doesn't have a system menu, most likely due to the
			// lack of the "WS_SYSMENU" window style. This situation should not be treated
			// as an error so just ignore it and return early.
			return;
			return true;
			}

			const bool maxOrFull = IsMaximized(hWnd) \|\| isFullScreen(hWnd);
			@@ -325,7 +583,8 @@
			// Popup the system menu at the required position.
			const auto result = ::TrackPopupMenu(
			hMenu,
			(TPM_RETURNCMD \| (QGuiApplication::isRightToLeft() ? TPM_RIGHTALIGN : TPM_LEFTALIGN)),
			(TPM_RETURNCMD \| (QGuiApplication::isRightToLeft() ? TPM_RIGHTALIGN : TPM_LEFTALIGN) \|
			TPM_RIGHTBUTTON),
			pos.x, pos.y, 0, hWnd, nullptr);

			// Unhighlight the first menu item after the popup menu is closed, otherwise it will keep
			@@ -334,11 +593,12 @@

			if (!result) {
			// The user canceled the menu, no need to continue.
			return;
			return false;
			}

			// Send the command that the user chooses to the corresponding window.
			::PostMessageW(hWnd, WM_SYSCOMMAND, result, 0);
			return true;
			}

			static inline Win32WindowContext::WindowPart getHitWindowPart(int hitTestResult) {
			@@ -365,7 +625,7 @@
			case HTBORDER:
			return Win32WindowContext::FixedBorder;
			default:
			// unreachable
			Q_UNREACHABLE();
			break;
			}
			return Win32WindowContext::Outside;
			@@ -403,6 +663,107 @@
			return true;
			}

			static inline constexpr bool isNonClientMessage(const UINT message) {
			if (((message >= WM_NCCREATE) && (message <= WM_NCACTIVATE)) \|\|
			((message >= WM_NCMOUSEMOVE) && (message <= WM_NCMBUTTONDBLCLK)) \|\|
			((message >= WM_NCXBUTTONDOWN) && (message <= WM_NCXBUTTONDBLCLK))
			#if (WINVER >= _WIN32_WINNT_WIN8)
			\|\| ((message >= WM_NCPOINTERUPDATE) && (message <= WM_NCPOINTERUP))
			#endif
			\|\| ((message == WM_NCMOUSEHOVER) \|\| (message == WM_NCMOUSELEAVE))) {
			return true;
			} else {
			return false;
			}
			}

			static MSG createMessageBlock(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
			MSG msg;
			msg.hwnd = hWnd; // re-create MSG structure
			msg.message = message; // time and pt fields ignored
			msg.wParam = wParam;
			msg.lParam = lParam;

			const DWORD dwScreenPos = ::GetMessagePos();
			msg.pt.x = GET_X_LPARAM(dwScreenPos);
			msg.pt.y = GET_Y_LPARAM(dwScreenPos);
			if (!isNonClientMessage(message)) {
			::ScreenToClient(hWnd, &msg.pt);
			}
			return msg;
			}

			static inline constexpr bool isInputMessage(UINT m) {
			switch (m) {
			case WM_IME_STARTCOMPOSITION:
			case WM_IME_ENDCOMPOSITION:
			case WM_IME_COMPOSITION:
			case WM_INPUT:
			case WM_TOUCH:
			case WM_MOUSEHOVER:
			case WM_MOUSELEAVE:
			case WM_NCMOUSEHOVER:
			case WM_NCMOUSELEAVE:
			case WM_SIZING:
			case WM_MOVING:
			case WM_SYSCOMMAND:
			case WM_COMMAND:
			case WM_DWMNCRENDERINGCHANGED:
			case WM_PAINT:
			return true;
			default:
			break;
			}
			return (m >= WM_MOUSEFIRST && m <= WM_MOUSELAST) \|\|
			(m >= WM_NCMOUSEMOVE && m <= WM_NCXBUTTONDBLCLK) \|\|
			(m >= WM_KEYFIRST && m <= WM_KEYLAST);
			}

			static inline QByteArray nativeEventType() {
			return QByteArrayLiteral("windows_generic_MSG");
			}

			// Send to QAbstractEventDispatcher
			bool filterNativeEvent(MSG msg, LRESULT result) {
			auto dispatcher = QAbstractEventDispatcher::instance();
			QT_NATIVE_EVENT_RESULT_TYPE filterResult = *result;
			if (dispatcher && dispatcher->filterNativeEvent(nativeEventType(), msg, &filterResult)) {
			*result = LRESULT(filterResult);
			return true;
			}
			return false;
			}

			// Send to QWindowSystemInterface
			bool filterNativeEvent(QWindow window, MSG msg, LRESULT *result) {
			QT_NATIVE_EVENT_RESULT_TYPE filterResult = *result;
			if (QWindowSystemInterface::handleNativeEvent(window, nativeEventType(), msg,
			&filterResult)) {
			*result = LRESULT(filterResult);
			return true;
			}
			return false;
			}

			static inline bool forwardFilteredEvent(QWindow *window, HWND hWnd, UINT message, WPARAM wParam,
			LPARAM lParam, LRESULT *result) {
			MSG msg = createMessageBlock(hWnd, message, wParam, lParam);

			// https://github.com/qt/qtbase/blob/e26a87f1ecc40bc8c6aa5b889fce67410a57a702/src/plugins/platforms/windows/qwindowscontext.cpp#L1025
			// Do exact the same as what Qt Windows plugin does.

			// Run the native event filters. QTBUG-67095: Exclude input messages which are sent
			// by QEventDispatcherWin32::processEvents()
			if (!isInputMessage(msg.message) && filterNativeEvent(&msg, result))
			return true;

			auto platformWindow = window->handle();
			if (platformWindow && filterNativeEvent(platformWindow->window(), &msg, result))
			return true;

			return false;
			}

			// https://github.com/qt/qtbase/blob/e26a87f1ecc40bc8c6aa5b889fce67410a57a702/src/plugins/platforms/windows/qwindowscontext.cpp#L1556
			// In QWindowsContext::windowsProc(), the messages will be passed to all global native event
			// filters, but because we have already filtered the messages in the hook WndProc function for
			@@ -422,23 +783,44 @@
			return false;
			}

			// https://github.com/qt/qtbase/blob/e26a87f1ecc40bc8c6aa5b889fce67410a57a702/src/plugins/platforms/windows/qwindowscontext.cpp#L1546
			// Qt needs to refer to the WM_NCCALCSIZE message data that hasn't been processed, so we
			// have to process it after Qt acquires the initial data.
			auto msg = static_cast<const MSG *>(message);
			if (msg->message == WM_NCCALCSIZE && lastMessageContext) {
			LRESULT res;
			if (lastMessageContext->nonClientCalcSizeHandler(msg->hwnd, msg->message,
			msg->wParam, msg->lParam, &res)) {
			result = decltype(result)(res);
			return true;
			switch (msg->message) {
			case WM_NCCALCSIZE: {
			// https://github.com/qt/qtbase/blob/e26a87f1ecc40bc8c6aa5b889fce67410a57a702/src/plugins/platforms/windows/qwindowscontext.cpp#L1546
			// Qt needs to refer to the WM_NCCALCSIZE message data that hasn't been
			// processed, so we have to process it after Qt acquires the initial data.
			if (lastMessageContext) {
			LRESULT res;
			if (lastMessageContext->nonClientCalcSizeHandler(
			msg->hwnd, msg->message, msg->wParam, msg->lParam, &res)) {
			result = decltype(result)(res);
			return true;
			}
			}
			break;
			}

			// case WM_NCHITTEST: {
			// // The child window must return HTTRANSPARENT when processing
			// WM_NCHITTEST for
			// // the parent window to receive WM_NCHITTEST.
			// if (!lastMessageContext) {
			// auto rootHWnd = ::GetAncestor(msg->hwnd, GA_ROOT);
			// if (rootHWnd != msg->hwnd) {
			// if (auto ctx = g_wndProcHash->value(rootHWnd)) {
			// *result = HTTRANSPARENT;
			// return true;
			// }
			// }
			// }
			// break;
			// }
			}
			return false;
			}

			static WindowsNativeEventFilter *instance;
			static Win32WindowContext *lastMessageContext;
			static inline WindowsNativeEventFilter *instance = nullptr;
			static inline Win32WindowContext *lastMessageContext = nullptr;

			static inline void install() {
			if (instance) {
			@@ -455,9 +837,6 @@
			instance = nullptr;
			}
			};

			WindowsNativeEventFilter *WindowsNativeEventFilter::instance = nullptr;
			Win32WindowContext *WindowsNativeEventFilter::lastMessageContext = nullptr;

			// https://github.com/qt/qtbase/blob/e26a87f1ecc40bc8c6aa5b889fce67410a57a702/src/plugins/platforms/windows/qwindowscontext.cpp#L1025
			// We can see from the source code that Qt will filter out some messages first and then send the
			@@ -524,18 +903,24 @@
			return ::DefWindowProcW(hWnd, message, wParam, lParam);
			}

			WindowsNativeEventFilter::lastMessageContext = ctx;
			const auto &contextCleaner = qScopeGuard([]() {
			WindowsNativeEventFilter::lastMessageContext = nullptr; //
			});

			// Since Qt does the necessary processing of the WM_NCCALCSIZE message, we need to
			// forward it right away and process it in our native event filter.
			if (message == WM_NCCALCSIZE) {
			WindowsNativeEventFilter::lastMessageContext = ctx;
			LRESULT result = ::CallWindowProcW(g_qtWindowProc, hWnd, message, wParam, lParam);
			WindowsNativeEventFilter::lastMessageContext = nullptr;
			return result;
			return ::CallWindowProcW(g_qtWindowProc, hWnd, message, wParam, lParam);
			}

			// Try hooked procedure and save result
			LRESULT result;
			if (ctx->windowProc(hWnd, message, wParam, lParam, &result)) {
			// Forward the event to user-defined native event filters, there may be some messages
			// that need to be processed by the user.
			std::ignore =
			forwardFilteredEvent(ctx->window(), hWnd, message, wParam, lParam, &result);
			return result;
			}

			@@ -544,18 +929,10 @@
			}

			static inline void addManagedWindow(QWindow window, HWND hWnd, Win32WindowContext ctx) {
			const auto margins = [hWnd]() -> QMargins {
			const auto titleBarHeight = int(getTitleBarHeight(hWnd));
			if (isWin10OrGreater()) {
			return {0, -titleBarHeight, 0, 0};
			} else {
			const auto frameSize = int(getResizeBorderThickness(hWnd));
			return {-frameSize, -titleBarHeight, -frameSize, -frameSize};
			}
			}();

			// Inform Qt we want and have set custom margins
			setInternalWindowFrameMargins(window, margins);
			if (isSystemBorderEnabled()) {
			// Inform Qt we want and have set custom margins
			setInternalWindowFrameMargins(window, QMargins(0, -int(getTitleBarHeight(hWnd)), 0, 0));
			}

			// Store original window proc
			if (!g_qtWindowProc) {
			@@ -583,12 +960,14 @@
			}
			}

			Win32WindowContext::Win32WindowContext() : AbstractWindowContext() {
			Win32WindowContext::Win32WindowContext()
			: AbstractWindowContext(), lastHitTestResult(WindowPart::Outside),
			lastHitTestResultRaw(HTNOWHERE), mouseLeaveBlocked(false), iconButtonClickTime(0) {
			}

			Win32WindowContext::~Win32WindowContext() {
			if (windowId) {
			removeManagedWindow(reinterpret_cast<HWND>(windowId));
			if (m_windowId) {
			removeManagedWindow(reinterpret_cast<HWND>(m_windowId));
			}
			}

			@@ -598,35 +977,28 @@

			void Win32WindowContext::virtual_hook(int id, void *data) {
			switch (id) {
			case CentralizeHook: {
			if (!windowId)
			return;
			const auto hwnd = reinterpret_cast<HWND>(windowId);
			moveWindowToDesktopCenter(hwnd);
			return;
			}

			case RaiseWindowHook: {
			if (!windowId)
			if (!m_windowId)
			return;
			const auto hwnd = reinterpret_cast<HWND>(windowId);
			m_delegate->setWindowVisible(m_host, true);
			const auto hwnd = reinterpret_cast<HWND>(m_windowId);
			bringWindowToFront(hwnd);
			return;
			}

			case ShowSystemMenuHook: {
			if (!windowId)
			if (!m_windowId)
			return;
			const auto &pos = static_cast<const QPoint >(data);
			auto hWnd = reinterpret_cast<HWND>(windowId);
			auto hWnd = reinterpret_cast<HWND>(m_windowId);
			#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
			const QPoint nativeGlobalPos =
			QHighDpi::toNativeGlobalPosition(pos, m_windowHandle);
			#else
			const QPoint nativeGlobalPos = QHighDpi::toNativePixels(pos, m_windowHandle);
			#endif
			showSystemMenu2(hWnd, qpoint2point(nativeGlobalPos), false,
			m_delegate->isHostSizeFixed(m_host));
			std::ignore = showSystemMenu_sys(hWnd, qpoint2point(nativeGlobalPos), false,
			m_delegate->isHostSizeFixed(m_host));
			return;
			}

			@@ -640,18 +1012,19 @@
			return;
			}

			#if QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDERS)
			case DrawWindows10BorderHook: {
			if (!windowId)
			if (!m_windowId)
			return;

			auto args = static_cast<void **>(data);
			auto &painter = static_cast<QPainter >(args[0]);
			const auto &rect = static_cast<const QRect >(args[1]);
			const auto &region = static_cast<const QRegion >(args[2]);
			const auto hwnd = reinterpret_cast<HWND>(windowId);
			const auto hwnd = reinterpret_cast<HWND>(m_windowId);

			QPen pen;
			pen.setWidth(getWindowFrameBorderThickness(hwnd) * 2);
			pen.setWidth(int(getWindowFrameBorderThickness(hwnd)) * 2);

			const bool dark = isDarkThemeActive() && isDarkWindowFrameEnabled(hwnd);
			if (m_delegate->isWindowActive(m_host)) {
			@@ -671,7 +1044,7 @@
			}
			painter.save();

			// We needs anti-aliasing to give us better result.
			// We need antialiasing to give us better result.
			painter.setRenderHint(QPainter::Antialiasing);

			painter.setPen(pen);
			@@ -683,55 +1056,114 @@
			return;
			}

			case DrawWindows10BorderHook2: {
			if (!m_windowId)
			return;

			// https://github.com/microsoft/terminal/blob/71a6f26e6ece656084e87de1a528c4a8072eeabd/src/cascadia/WindowsTerminal/NonClientIslandWindow.cpp#L1025
			// https://docs.microsoft.com/en-us/windows/win32/dwm/customframe#extending-the-client-frame
			// Draw a black rectangle to make Windows native top border show

			auto hWnd = reinterpret_cast<HWND>(m_windowId);
			HDC hdc = ::GetDC(hWnd);
			RECT windowRect{};
			::GetClientRect(hWnd, &windowRect);
			RECT rcTopBorder = {
			0,
			0,
			RECT_WIDTH(windowRect),
			int(getWindowFrameBorderThickness(hWnd)),
			};
			::FillRect(hdc, &rcTopBorder,
			reinterpret_cast<HBRUSH>(::GetStockObject(BLACK_BRUSH)));
			::ReleaseDC(hWnd, hdc);
			return;
			}
			#endif

			default:
			break;
			}
			AbstractWindowContext::virtual_hook(id, data);
			}

			bool Win32WindowContext::needBorderPainter() const {
			return isWin10OrGreater() && !isWin11OrGreater();
			}
			QVariant Win32WindowContext::windowAttribute(const QString &key) const {
			if (key == QStringLiteral("window-rect")) {
			if (!m_windowId)
			return {};

			int Win32WindowContext::borderThickness() const {
			return getWindowFrameBorderThickness(reinterpret_cast<HWND>(windowId));
			}

			void Win32WindowContext::winIdChanged() {
			// If the original window id is valid, remove all resources related
			if (windowId) {
			removeManagedWindow(reinterpret_cast<HWND>(windowId));
			windowId = 0;
			RECT frame{};
			auto hwnd = reinterpret_cast<HWND>(m_windowId);
			// According to MSDN, WS_OVERLAPPED is not allowed for AdjustWindowRect.
			auto style = static_cast<DWORD>(::GetWindowLongPtrW(hwnd, GWL_STYLE) & ~WS_OVERLAPPED);
			auto exStyle = static_cast<DWORD>(::GetWindowLongPtrW(hwnd, GWL_EXSTYLE));
			const DynamicApis &apis = DynamicApis::instance();
			if (apis.pAdjustWindowRectExForDpi) {
			apis.pAdjustWindowRectExForDpi(&frame, style, FALSE, exStyle,
			getDpiForWindow(hwnd));
			} else {
			::AdjustWindowRectEx(&frame, style, FALSE, exStyle);
			}
			return QVariant::fromValue(rect2qrect(frame));
			}

			if (!m_windowHandle) {
			if (key == QStringLiteral("win10-border-needed")) {
			return isSystemBorderEnabled() && !isWin11OrGreater();
			}

			if (key == QStringLiteral("border-thickness")) {
			return m_windowId
			? int(getWindowFrameBorderThickness(reinterpret_cast<HWND>(m_windowId)))
			: 0;
			}
			return AbstractWindowContext::windowAttribute(key);
			}

			void Win32WindowContext::winIdChanged(WId winId, WId oldWinId) {
			// Reset the context data
			mouseLeaveBlocked = false;
			lastHitTestResult = WindowPart::Outside;
			lastHitTestResultRaw = HTNOWHERE;

			if (!isSystemBorderEnabled()) {
			m_delegate->setWindowFlags(m_host, m_delegate->getWindowFlags(m_host) \|
			Qt::FramelessWindowHint);
			}

			// If the original window id is valid, remove all resources related
			if (oldWinId) {
			removeManagedWindow(reinterpret_cast<HWND>(oldWinId));
			}

			if (!winId) {
			return;
			}

			// Install window hook
			auto winId = m_windowHandle->winId();
			auto hWnd = reinterpret_cast<HWND>(winId);
			if (!isSystemBorderEnabled()) {
			static auto margins = QVariant::fromValue(QMargins(1, 1, 1, 1));

			if (!isWin10OrGreater()) {
			static constexpr const MARGINS margins = {1, 1, 1, 1};
			DynamicApis::instance().pDwmExtendFrameIntoClientArea(hWnd, &margins);
			// If we remove the system border, the window will lose its shadow. If dwm is enabled,
			// then we need to set at least 1px margins, otherwise the following operation will
			// fail with no effect.
			setWindowAttribute(QStringLiteral("extra-margins"), margins);
			}

			#if QT_VERSION < QT_VERSION_CHECK(6, 5, 0)
			for (const auto attr : {
			_DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20H1,
			_DWMWA_USE_IMMERSIVE_DARK_MODE,
			}) {
			const BOOL enable = TRUE;
			DynamicApis::instance().pDwmSetWindowAttribute(hWnd, attr, &enable, sizeof(enable));
			// We should disable WS_SYSMENU, otherwise the system button icons will be visible if mica
			// is enabled and the title bar is transparent.
			{
			auto style = ::GetWindowLongPtrW(hWnd, GWL_STYLE);
			if (isSystemBorderEnabled()) {
			::SetWindowLongPtrW(hWnd, GWL_STYLE, style & (~WS_SYSMENU));
			} else {
			::SetWindowLongPtrW(hWnd, GWL_STYLE,
			(style \| WS_THICKFRAME \| WS_CAPTION) & (~WS_SYSMENU));
			}
			}
			#endif

			// Add managed window
			addManagedWindow(m_windowHandle, hWnd, this);

			// Cache win id
			windowId = winId;
			}

			bool Win32WindowContext::windowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam,
			@@ -741,8 +1173,8 @@
			// We should skip these messages otherwise we will get crashes.
			// NOTE: WM_QUIT won't be posted to the WindowProc function.
			switch (message) {
			case WM_CLOSE:
			case WM_DESTROY:
			case WM_CLOSE:
			case WM_NCDESTROY:
			// Undocumented messages:
			case WM_UAHDESTROYWINDOW:
			@@ -755,6 +1187,9 @@
			if (!isValidWindow(hWnd, false, true)) {
			return false;
			}

			// qDebug().noquote() << QString::fromWCharArray(xmsgHash.value(message, L"")) << Qt::hex
			// << message;

			// Test snap layout
			if (snapLayoutHandler(hWnd, message, wParam, lParam, result)) {
			@@ -773,13 +1208,9 @@

			// Forward to native event filter subscribers
			if (!m_nativeEventFilters.isEmpty()) {
			MSG msg;
			msg.hwnd = hWnd;
			msg.message = message;
			msg.wParam = wParam;
			msg.lParam = lParam;
			MSG msg = createMessageBlock(hWnd, message, wParam, lParam);
			QT_NATIVE_EVENT_RESULT_TYPE res = 0;
			if (dispatch(QByteArrayLiteral("windows_generic_MSG"), &msg, &res)) {
			if (nativeDispatch(nativeEventType(), &msg, &res)) {
			*result = LRESULT(res);
			return true;
			}
			@@ -789,8 +1220,45 @@

			bool Win32WindowContext::windowAttributeChanged(const QString &key, const QVariant &attribute,
			const QVariant &oldAttribute) {
			const auto hwnd = reinterpret_cast<HWND>(window->winId());
			Q_UNUSED(oldAttribute)

			const auto hwnd = reinterpret_cast<HWND>(m_windowId);
			const DynamicApis &apis = DynamicApis::instance();
			static constexpr const MARGINS extendedMargins = {-1, -1, -1, -1};
			const auto &restoreMargins = [this, &apis, hwnd]() {
			auto margins = qmargins2margins(
			m_windowAttributes.value(QStringLiteral("extra-margins")).value<QMargins>());
			apis.pDwmExtendFrameIntoClientArea(hwnd, &margins);
			};

			if (key == QStringLiteral("extra-margins")) {
			auto margins = qmargins2margins(attribute.value<QMargins>());
			return apis.pDwmExtendFrameIntoClientArea(hwnd, &margins) == S_OK;
			}

			if (key == QStringLiteral("dark-mode")) {
			if (!isWin101809OrGreater()) {
			return false;
			}

			BOOL enable = attribute.toBool();
			if (isWin101903OrGreater()) {
			apis.pSetPreferredAppMode(enable ? PAM_AUTO : PAM_DEFAULT);
			} else {
			apis.pAllowDarkModeForApp(enable);
			}
			for (const auto attr : {
			_DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20H1,
			_DWMWA_USE_IMMERSIVE_DARK_MODE,
			}) {
			apis.pDwmSetWindowAttribute(hwnd, attr, &enable, sizeof(enable));
			}

			apis.pFlushMenuThemes();
			return true;
			}

			// For Win11 or later
			if (key == QStringLiteral("mica")) {
			if (!isWin11OrGreater()) {
			return false;
			@@ -798,8 +1266,7 @@
			if (attribute.toBool()) {
			// We need to extend the window frame into the whole client area to be able
			// to see the blurred window background.
			static constexpr const MARGINS margins = {-1, -1, -1, -1};
			apis.pDwmExtendFrameIntoClientArea(hwnd, &margins);
			apis.pDwmExtendFrameIntoClientArea(hwnd, &extendedMargins);
			if (isWin1122H2OrGreater()) {
			// Use official DWM API to enable Mica, available since Windows 11 22H2
			// (10.0.22621).
			@@ -821,19 +1288,19 @@
			const BOOL enable = FALSE;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_MICA_EFFECT, &enable, sizeof(enable));
			}
			static constexpr const MARGINS margins = {0, 0, 0, 0};
			apis.pDwmExtendFrameIntoClientArea(hwnd, &margins);
			restoreMargins();
			}
			return true;
			} else if (key == QStringLiteral("mica-alt")) {
			}

			if (key == QStringLiteral("mica-alt")) {
			if (!isWin1122H2OrGreater()) {
			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.
			static constexpr const MARGINS margins = {-1, -1, -1, -1};
			apis.pDwmExtendFrameIntoClientArea(hwnd, &margins);
			apis.pDwmExtendFrameIntoClientArea(hwnd, &extendedMargins);
			// Use official DWM API to enable Mica Alt, available since Windows 11 22H2
			// (10.0.22621).
			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_TABBEDWINDOW;
			@@ -843,64 +1310,62 @@
			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_AUTO;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
			sizeof(backdropType));
			static constexpr const MARGINS margins = {0, 0, 0, 0};
			apis.pDwmExtendFrameIntoClientArea(hwnd, &margins);
			restoreMargins();
			}
			return true;
			} else if (key == QStringLiteral("acrylic-material")) {
			if (!isWin10OrGreater()) {
			}

			if (key == QStringLiteral("acrylic-material")) {
			if (!isWin11OrGreater()) {
			return false;
			}
			if (attribute.userType() == QMetaType::QColor) {
			// We need to extend the window frame into the whole client area to be able
			// to see the blurred window background.
			static constexpr const MARGINS margins = {-1, -1, -1, -1};
			apis.pDwmExtendFrameIntoClientArea(hwnd, &margins);
			if (isWin11OrGreater()) {
			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_TRANSIENTWINDOW;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
			sizeof(backdropType));
			} else {
			auto gradientColor = attribute.value<QColor>();

			ACCENT_POLICY policy{};
			policy.dwAccentState = ACCENT_ENABLE_ACRYLICBLURBEHIND;
			policy.dwAccentFlags = ACCENT_ENABLE_ACRYLIC_WITH_LUMINOSITY;
			// This API expects the #AABBGGRR format.
			policy.dwGradientColor =
			DWORD(qRgba(gradientColor.blue(), gradientColor.green(),
			gradientColor.red(), gradientColor.alpha()));
			WINDOWCOMPOSITIONATTRIBDATA wcad{};
			wcad.Attrib = WCA_ACCENT_POLICY;
			wcad.pvData = &policy;
			wcad.cbData = sizeof(policy);
			apis.pSetWindowCompositionAttribute(hwnd, &wcad);
			}
			} else {
			if (isWin11OrGreater()) {
			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_AUTO;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
			sizeof(backdropType));
			} else {
			ACCENT_POLICY policy{};
			policy.dwAccentState = ACCENT_DISABLED;
			policy.dwAccentFlags = ACCENT_NONE;
			WINDOWCOMPOSITIONATTRIBDATA wcad{};
			wcad.Attrib = WCA_ACCENT_POLICY;
			wcad.pvData = &policy;
			wcad.cbData = sizeof(policy);
			apis.pSetWindowCompositionAttribute(hwnd, &wcad);
			}
			static constexpr const MARGINS margins = {0, 0, 0, 0};
			apis.pDwmExtendFrameIntoClientArea(hwnd, &margins);
			}
			return true;
			} else if (key == QStringLiteral("dwm-blur")) {
			if (attribute.toBool()) {
			// We need to extend the window frame into the whole client area to be able
			// to see the blurred window background.
			static constexpr const MARGINS margins = {-1, -1, -1, -1};
			apis.pDwmExtendFrameIntoClientArea(hwnd, &margins);
			apis.pDwmExtendFrameIntoClientArea(hwnd, &extendedMargins);

			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_TRANSIENTWINDOW;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
			sizeof(backdropType));

			// PRIVATE API REFERENCE:
			// QColor gradientColor = {};
			// ACCENT_POLICY policy{};
			// policy.dwAccentState = ACCENT_ENABLE_ACRYLICBLURBEHIND;
			// policy.dwAccentFlags = ACCENT_ENABLE_ACRYLIC_WITH_LUMINOSITY;
			// // This API expects the #AABBGGRR format.
			// policy.dwGradientColor =
			// DWORD(qRgba(gradientColor.blue(), gradientColor.green(),
			// gradientColor.red(), gradientColor.alpha()));
			// WINDOWCOMPOSITIONATTRIBDATA wcad{};
			// wcad.Attrib = WCA_ACCENT_POLICY;
			// wcad.pvData = &policy;
			// wcad.cbData = sizeof(policy);
			// apis.pSetWindowCompositionAttribute(hwnd, &wcad);
			} else {
			const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_AUTO;
			apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
			sizeof(backdropType));

			// PRIVATE API REFERENCE:
			// ACCENT_POLICY policy{};
			// policy.dwAccentState = ACCENT_DISABLED;
			// policy.dwAccentFlags = ACCENT_NONE;
			// WINDOWCOMPOSITIONATTRIBDATA wcad{};
			// wcad.Attrib = WCA_ACCENT_POLICY;
			// wcad.pvData = &policy;
			// wcad.cbData = sizeof(policy);
			// apis.pSetWindowCompositionAttribute(hwnd, &wcad);

			restoreMargins();
			}
			return true;
			}

			if (key == QStringLiteral("dwm-blur")) {
			if (attribute.toBool()) {
			// We can't extend the window frame for this effect.
			restoreMargins();
			if (isWin8OrGreater()) {
			ACCENT_POLICY policy{};
			policy.dwAccentState = ACCENT_ENABLE_BLURBEHIND;
			@@ -913,8 +1378,7 @@
			} else {
			DWM_BLURBEHIND bb{};
			bb.fEnable = TRUE;
			bb.fTransitionOnMaximized = TRUE;
			bb.dwFlags = DWM_BB_ENABLE \| DWM_BB_TRANSITIONONMAXIMIZED;
			bb.dwFlags = DWM_BB_ENABLE;
			apis.pDwmEnableBlurBehindWindow(hwnd, &bb);
			}
			} else {
			@@ -933,8 +1397,6 @@
			bb.dwFlags = DWM_BB_ENABLE;
			apis.pDwmEnableBlurBehindWindow(hwnd, &bb);
			}
			static constexpr const MARGINS margins = {0, 0, 0, 0};
			apis.pDwmExtendFrameIntoClientArea(hwnd, &margins);
			}
			return true;
			}
			@@ -1143,9 +1605,8 @@
			case WM_NCPOINTERUP:
			#endif
			case WM_NCMOUSEHOVER: {
			const WindowPart currentWindowPart = lastHitTestResult;
			if (message == WM_NCMOUSEMOVE) {
			if (currentWindowPart != WindowPart::ChromeButton) {
			if (lastHitTestResult != WindowPart::ChromeButton) {
			// https://github.com/qt/qtbase/blob/e26a87f1ecc40bc8c6aa5b889fce67410a57a702/src/widgets/kernel/qwidgetwindow.cpp#L472
			// When the mouse press event arrives, QWidgetWindow will implicitly grab
			// the top widget right under the mouse, and set `qt_button_down` to this
			@@ -1194,29 +1655,38 @@
			// the above problems would not arise.

			m_delegate->resetQtGrabbedControl(m_host);

			// If the mouse moves from chrome buttons to other non-client areas, a
			// WM_MOUSELEAVE message should be sent.
			if (mouseLeaveBlocked) {
			emulateClientAreaMessage(hWnd, message, wParam, lParam,
			WM_NCMOUSELEAVE);
			}
			}

			// We need to make sure we get the right hit-test result when a WM_NCMOUSELEAVE
			// comes, so we reset it when we receive a WM_NCMOUSEMOVE.

			// If the mouse is entering the client area, there must be a WM_NCHITTEST
			// setting it to `Client` before the WM_NCMOUSELEAVE comes; if the mouse is
			// leaving the window, current window part remains as `Outside`.
			lastHitTestResult = WindowPart::Outside;
			}

			if (currentWindowPart == WindowPart::ChromeButton) {
			emulateClientAreaMessage(hWnd, message, wParam, lParam);
			if (lastHitTestResult == WindowPart::ChromeButton) {
			if (message == WM_NCMOUSEMOVE) {
			// ### FIXME FIXME FIXME
			// ### FIXME: Calling DefWindowProc() here is really dangerous, investigate
			// how to avoid doing this.
			// ### FIXME FIXME FIXME
			*result = ::DefWindowProcW(hWnd, WM_NCMOUSEMOVE, wParam, lParam);
			} else if (lastHitTestResultRaw == HTSYSMENU) {
			if (message == WM_NCLBUTTONDOWN) {
			// A message of WM_SYSCOMMAND with SC_MOUSEMENU will be sent by Windows,
			// and the current control flow will be blocked by the menu while
			// Windows will create and execute a new event loop until the menu
			// returns
			iconButtonClickTime = ::GetTickCount64();
			*result = ::DefWindowProcW(hWnd, message, wParam, lParam);
			iconButtonClickTime = 0;
			} else if (message == WM_NCLBUTTONDBLCLK) {
			// A message of WM_SYSCOMMAND with SC_CLOSE will be sent by Windows
			*result = ::DefWindowProcW(hWnd, message, wParam, lParam);
			} else {
			*result = FALSE;
			}
			} else {
			// According to MSDN, we should return non-zero for X button messages to
			// indicate we have handled these messages (due to historical reasons), for
			@@ -1226,6 +1696,7 @@
			? TRUE
			: FALSE);
			}
			emulateClientAreaMessage(hWnd, message, wParam, lParam);
			return true;
			}
			break;
			@@ -1238,7 +1709,7 @@
			// pressing area as HTCLIENT which maybe because of our former retransmission of
			// WM_NCLBUTTONDOWN, as a result, a WM_NCMOUSELEAVE will come immediately and a
			// lot of WM_MOUSEMOVE will come if we move the mouse, we should track the mouse
			// in advance.
			// in advance. (May be redundant?)
			if (mouseLeaveBlocked) {
			mouseLeaveBlocked = false;
			requestForMouseLeaveMessage(hWnd, false);
			@@ -1272,19 +1743,6 @@
			bool Win32WindowContext::customWindowHandler(HWND hWnd, UINT message, WPARAM wParam,
			LPARAM lParam, LRESULT *result) {
			switch (message) {
			case WM_SHOWWINDOW: {
			if (!centered) {
			// If wParam is TRUE, the window is being shown.
			// If lParam is zero, the message was sent because of a call to the ShowWindow
			// function.
			if (wParam && !lParam) {
			centered = true;
			moveWindowToDesktopCenter(hWnd);
			}
			}
			break;
			}

			case WM_NCHITTEST: {
			// 原生Win32窗口只有顶边是在窗口内部resize的，其余三边都是在窗口
			// 外部进行resize的，其原理是，WS_THICKFRAME这个窗口样式会在窗
			@@ -1367,7 +1825,8 @@
			// color, our homemade top border can almost have exactly the same
			// appearance with the system's one.
			[[maybe_unused]] const auto &hitTestRecorder = qScopeGuard([this, result]() {
			lastHitTestResult = getHitWindowPart(int(*result)); //
			lastHitTestResultRaw = int(*result);
			lastHitTestResult = getHitWindowPart(lastHitTestResultRaw);
			});

			POINT nativeGlobalPos{GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)};
			@@ -1466,7 +1925,7 @@
			int frameSize = getResizeBorderThickness(hWnd);
			bool isTop = (nativeLocalPos.y < frameSize);

			if (isWin10OrGreater()) {
			if (isSystemBorderEnabled()) {
			// This will handle the left, right and bottom parts of the frame
			// because we didn't change them.
			LRESULT originalHitTestResult = ::DefWindowProcW(hWnd, WM_NCHITTEST, 0, lParam);
			@@ -1594,7 +2053,7 @@
			break;
			}

			if (!isWin10OrGreater()) {
			if (!isSystemBorderEnabled()) {
			switch (message) {
			case WM_NCUAHDRAWCAPTION:
			case WM_NCUAHDRAWFRAME: {
			@@ -1745,7 +2204,7 @@
			// and align it with the upper-left corner of our new client area".
			const auto clientRect = wParam ? &(reinterpret_cast<LPNCCALCSIZE_PARAMS>(lParam))->rgrc[0]
			: reinterpret_cast<LPRECT>(lParam);
			if (isWin10OrGreater()) {
			if (isSystemBorderEnabled()) {
			// Store the original top margin before the default window procedure applies the
			// default frame.
			const LONG originalTop = clientRect->top;
			@@ -1772,6 +2231,7 @@
			// technique to bring the top border back.
			clientRect->top = originalTop;
			}

			const bool max = IsMaximized(hWnd);
			const bool full = isFullScreen(hWnd);
			// We don't need this correction when we're fullscreen. We will
			@@ -1786,7 +2246,7 @@
			// a window when it's maximized unless you restore it).
			const quint32 frameSize = getResizeBorderThickness(hWnd);
			clientRect->top += frameSize;
			if (!isWin10OrGreater()) {
			if (!isSystemBorderEnabled()) {
			clientRect->bottom -= frameSize;
			clientRect->left += frameSize;
			clientRect->right -= frameSize;
			@@ -1889,10 +2349,11 @@
			const auto getNativeGlobalPosFromKeyboard = [hWnd]() -> POINT {
			const bool maxOrFull = IsMaximized(hWnd) \|\| isFullScreen(hWnd);
			const quint32 frameSize = getResizeBorderThickness(hWnd);
			const quint32 horizontalOffset = ((maxOrFull \|\| !isWin10OrGreater()) ? 0 : frameSize);
			const quint32 horizontalOffset =
			((maxOrFull \|\| !isSystemBorderEnabled()) ? 0 : frameSize);
			const auto verticalOffset = [hWnd, maxOrFull, frameSize]() -> quint32 {
			const quint32 titleBarHeight = getTitleBarHeight(hWnd);
			if (!isWin10OrGreater()) {
			if (!isSystemBorderEnabled()) {
			return titleBarHeight;
			}
			if (isWin11OrGreater()) {
			@@ -1914,6 +2375,7 @@
			bool shouldShowSystemMenu = false;
			bool broughtByKeyboard = false;
			POINT nativeGlobalPos{};

			switch (message) {
			case WM_RBUTTONUP: {
			const POINT nativeLocalPos = getNativePosFromMouse();
			@@ -1935,10 +2397,20 @@
			}
			case WM_SYSCOMMAND: {
			const WPARAM filteredWParam = (wParam & 0xFFF0);
			if ((filteredWParam == SC_KEYMENU) && (lParam == VK_SPACE)) {
			shouldShowSystemMenu = true;
			broughtByKeyboard = true;
			nativeGlobalPos = getNativeGlobalPosFromKeyboard();
			switch (filteredWParam) {
			case SC_MOUSEMENU:
			shouldShowSystemMenu = true;
			nativeGlobalPos = getNativeGlobalPosFromKeyboard();
			break;
			case SC_KEYMENU:
			if (lParam == VK_SPACE) {
			shouldShowSystemMenu = true;
			broughtByKeyboard = true;
			nativeGlobalPos = getNativeGlobalPosFromKeyboard();
			}
			break;
			default:
			break;
			}
			break;
			}
			@@ -1957,8 +2429,26 @@
			break;
			}
			if (shouldShowSystemMenu) {
			showSystemMenu2(hWnd, nativeGlobalPos, broughtByKeyboard,
			m_delegate->isHostSizeFixed(m_host));
			bool res = showSystemMenu_sys(hWnd, nativeGlobalPos, broughtByKeyboard,
			m_delegate->isHostSizeFixed(m_host));

			// Check time
			static uint32_t doubleClickTime = ::GetDoubleClickTime();
			if (!res && iconButtonClickTime != 0 &&
			::GetTickCount64() - iconButtonClickTime <= doubleClickTime) {
			POINT nativeGlobalPos;
			::GetCursorPos(&nativeGlobalPos);
			POINT nativeLocalPos = nativeGlobalPos;
			::ScreenToClient(hWnd, &nativeLocalPos);
			QPoint qtScenePos =
			QHighDpi::fromNativeLocalPosition(point2qpoint(nativeLocalPos), m_windowHandle);
			WindowAgentBase::SystemButton sysButtonType = WindowAgentBase::Unknown;
			if (isInSystemButtons(qtScenePos, &sysButtonType) &&
			sysButtonType == WindowAgentBase::WindowIcon) {
			::PostMessageW(hWnd, WM_SYSCOMMAND, SC_CLOSE, 0);
			}
			}

			// QPA's internal code will handle system menu events separately, and its
			// behavior is not what we would want to see because it doesn't know our
			// window doesn't have any window frame now, so return early here to avoid