/* * MIT License * * Copyright (C) 2020 by wangwenx190 (Yuhang Zhao) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include "winnativeeventfilter.h" #include #include #include #include #include #if (QT_VERSION >= QT_VERSION_CHECK(5, 9, 0)) #include #else #include #endif #ifdef QT_QUICK_LIB #include #endif #ifdef QT_WIDGETS_LIB #include #endif #if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0)) #include #else #include #include #endif #ifdef WNEF_LINK_SYSLIB #include #include #include #include #endif Q_DECLARE_METATYPE(QMargins) namespace { #if (QT_VERSION < QT_VERSION_CHECK(5, 7, 0)) #define qAsConst(i) std::as_const(i) #endif #ifndef USER_DEFAULT_SCREEN_DPI // Only available since Windows Vista #define USER_DEFAULT_SCREEN_DPI 96 #endif #ifndef SM_CXPADDEDBORDER // Only available since Windows Vista #define SM_CXPADDEDBORDER 92 #endif #ifndef WM_NCUAHDRAWCAPTION // Not documented, only available since Windows Vista #define WM_NCUAHDRAWCAPTION 0x00AE #endif #ifndef WM_NCUAHDRAWFRAME // Not documented, only available since Windows Vista #define WM_NCUAHDRAWFRAME 0x00AF #endif #ifndef WM_DWMCOMPOSITIONCHANGED // Only available since Windows Vista #define WM_DWMCOMPOSITIONCHANGED 0x031E #endif #ifndef WM_DPICHANGED // Only available since Windows 8.1 #define WM_DPICHANGED 0x02E0 #endif #ifndef ABM_GETAUTOHIDEBAREX // Only available since Windows 8.1 #define ABM_GETAUTOHIDEBAREX 0x0000000b #endif const UINT m_defaultDotsPerInch = USER_DEFAULT_SCREEN_DPI; const qreal m_defaultDevicePixelRatio = 1.0; bool isWin8OrGreator() { #if (QT_VERSION >= QT_VERSION_CHECK(5, 9, 0)) return QOperatingSystemVersion::current() >= QOperatingSystemVersion::Windows8; #else return QSysInfo::WindowsVersion >= QSysInfo::WV_WINDOWS8; #endif } bool isWin8Point1OrGreator() { #if (QT_VERSION >= QT_VERSION_CHECK(5, 9, 0)) return QOperatingSystemVersion::current() >= QOperatingSystemVersion::Windows8_1; #else return QSysInfo::WindowsVersion >= QSysInfo::WV_WINDOWS8_1; #endif } bool isWin10OrGreator(const int ver) { #if (QT_VERSION >= QT_VERSION_CHECK(5, 9, 0)) return QOperatingSystemVersion::current() >= QOperatingSystemVersion(QOperatingSystemVersion::Windows, 10, 0, ver); #else Q_UNUSED(ver) return QSysInfo::WindowsVersion >= QSysInfo::WV_WINDOWS10; #endif } #ifndef WNEF_GENERATE_WINAPI #define WNEF_GENERATE_WINAPI(funcName, resultType, ...) \ using _WNEF_WINAPI_##funcName = resultType(WINAPI *)(__VA_ARGS__); \ _WNEF_WINAPI_##funcName m_lp##funcName = nullptr; #endif #ifndef WNEF_RESOLVE_ERROR #ifdef _DEBUG #define WNEF_RESOLVE_ERROR(funcName) Q_ASSERT(m_lp##funcName); #else #define WNEF_RESOLVE_ERROR(funcName) \ if (!m_lp##funcName) { \ qCritical().noquote() << "Failed to resolve symbol" << #funcName; \ } #endif #endif #ifndef WNEF_RESOLVE_WINAPI #define WNEF_RESOLVE_WINAPI(libName, funcName) \ if (!m_lp##funcName) { \ m_lp##funcName = reinterpret_cast<_WNEF_WINAPI_##funcName>( \ GetProcAddress(GetModuleHandleW(L#libName), #funcName)); \ WNEF_RESOLVE_ERROR(funcName) \ } #endif #ifndef WNEF_EXECUTE_WINAPI #ifdef WNEF_LINK_SYSLIB #define WNEF_EXECUTE_WINAPI(funcName, ...) funcName(__VA_ARGS__); #else #define WNEF_EXECUTE_WINAPI(funcName, ...) \ if (m_lp##funcName) { \ m_lp##funcName(__VA_ARGS__); \ } #endif #endif #ifndef WNEF_EXECUTE_WINAPI_RETURN #ifdef WNEF_LINK_SYSLIB #define WNEF_EXECUTE_WINAPI_RETURN(funcName, defVal, ...) funcName(__VA_ARGS__) #else #define WNEF_EXECUTE_WINAPI_RETURN(funcName, defVal, ...) \ (m_lp##funcName ? m_lp##funcName(__VA_ARGS__) : defVal) #endif #endif #ifndef WNEF_LINK_SYSLIB // All the following enums, structs and function prototypes are copied from // Windows 10 SDK directly, without any modifications. #ifdef IsMinimized #undef IsMinimized #endif #ifdef IsMaximized #undef IsMaximized #endif // Only available since Windows 2000 #define IsMinimized(h) WNEF_EXECUTE_WINAPI_RETURN(IsIconic, FALSE, h) // Only available since Windows 2000 #define IsMaximized(h) WNEF_EXECUTE_WINAPI_RETURN(IsZoomed, FALSE, h) #ifndef GET_X_LPARAM // Only available since Windows 2000 #define GET_X_LPARAM(lp) ((int) (short) LOWORD(lp)) #endif #ifndef GET_Y_LPARAM // Only available since Windows 2000 #define GET_Y_LPARAM(lp) ((int) (short) HIWORD(lp)) #endif #ifndef GetStockBrush // Only available since Windows 2000 #define GetStockBrush(i) \ (reinterpret_cast(WNEF_EXECUTE_WINAPI_RETURN(GetStockObject, 0, i))) #endif #ifndef ABM_GETSTATE // Only available since Windows XP #define ABM_GETSTATE 0x00000004 #endif #ifndef ABM_GETTASKBARPOS // Only available since Windows XP #define ABM_GETTASKBARPOS 0x00000005 #endif #ifndef ABS_AUTOHIDE // Only available since Windows XP #define ABS_AUTOHIDE 0x0000001 #endif #ifndef ABE_LEFT // Only available since Windows XP #define ABE_LEFT 0 #endif #ifndef ABE_TOP // Only available since Windows XP #define ABE_TOP 1 #endif #ifndef ABE_RIGHT // Only available since Windows XP #define ABE_RIGHT 2 #endif #ifndef ABE_BOTTOM // Only available since Windows XP #define ABE_BOTTOM 3 #endif #ifndef BPPF_ERASE // Only available since Windows Vista #define BPPF_ERASE 0x0001 #endif #ifndef BPPF_NOCLIP // Only available since Windows Vista #define BPPF_NOCLIP 0x0002 #endif using HPAINTBUFFER = HANDLE; using MONITOR_DPI_TYPE = enum _MONITOR_DPI_TYPE { MDT_EFFECTIVE_DPI = 0 }; using DWMNCRENDERINGPOLICY = enum _DWMNCRENDERINGPOLICY { DWMNCRP_ENABLED = 2 }; using DWMWINDOWATTRIBUTE = enum _DWMWINDOWATTRIBUTE { DWMWA_NCRENDERING_POLICY = 2, DWMWA_EXTENDED_FRAME_BOUNDS = 9 }; using MARGINS = struct _MARGINS { int cxLeftWidth; int cxRightWidth; int cyTopHeight; int cyBottomHeight; }; using APPBARDATA = struct _APPBARDATA { DWORD cbSize; HWND hWnd; UINT uCallbackMessage; UINT uEdge; RECT rc; LPARAM lParam; }; using PROCESS_DPI_AWARENESS = enum _PROCESS_DPI_AWARENESS { PROCESS_DPI_UNAWARE = 0, PROCESS_SYSTEM_DPI_AWARE = 1, PROCESS_PER_MONITOR_DPI_AWARE = 2 }; using BP_BUFFERFORMAT = enum _BP_BUFFERFORMAT { BPBF_TOPDOWNDIB = 2 }; using BLENDFUNCTION = struct _BLENDFUNCTION { BYTE BlendOp; BYTE BlendFlags; BYTE SourceConstantAlpha; BYTE AlphaFormat; }; using BP_PAINTPARAMS = struct _BP_PAINTPARAMS { DWORD cbSize; DWORD dwFlags; CONST RECT *prcExclude; CONST BLENDFUNCTION *pBlendFunction; }; // Some of the following functions are not used by this code anymore, // but we don't remove them completely because we may still need them later. WNEF_GENERATE_WINAPI(DwmExtendFrameIntoClientArea, HRESULT, HWND, CONST MARGINS *) WNEF_GENERATE_WINAPI(DwmIsCompositionEnabled, HRESULT, BOOL *) WNEF_GENERATE_WINAPI(DwmSetWindowAttribute, HRESULT, HWND, DWORD, LPCVOID, DWORD) WNEF_GENERATE_WINAPI(SHAppBarMessage, UINT_PTR, DWORD, APPBARDATA *) WNEF_GENERATE_WINAPI(GetDeviceCaps, int, HDC, int) WNEF_GENERATE_WINAPI(DefWindowProcW, LRESULT, HWND, UINT, WPARAM, LPARAM) WNEF_GENERATE_WINAPI(SetLayeredWindowAttributes, BOOL, HWND, COLORREF, BYTE, DWORD) WNEF_GENERATE_WINAPI(MoveWindow, BOOL, HWND, int, int, int, int, BOOL) WNEF_GENERATE_WINAPI(IsZoomed, BOOL, HWND) WNEF_GENERATE_WINAPI(IsIconic, BOOL, HWND) WNEF_GENERATE_WINAPI(GetSystemMetrics, int, int) WNEF_GENERATE_WINAPI(GetDC, HDC, HWND) WNEF_GENERATE_WINAPI(ReleaseDC, int, HWND, HDC) WNEF_GENERATE_WINAPI(RedrawWindow, BOOL, HWND, CONST RECT *, HRGN, UINT) WNEF_GENERATE_WINAPI(GetClientRect, BOOL, HWND, LPRECT) WNEF_GENERATE_WINAPI(GetWindowRect, BOOL, HWND, LPRECT) WNEF_GENERATE_WINAPI(ScreenToClient, BOOL, HWND, LPPOINT) WNEF_GENERATE_WINAPI(EqualRect, BOOL, CONST RECT *, CONST RECT *) #if defined(WIN64) || defined(_WIN64) WNEF_GENERATE_WINAPI(GetWindowLongPtrW, LONG_PTR, HWND, int) WNEF_GENERATE_WINAPI(SetWindowLongPtrW, LONG_PTR, HWND, int, LONG_PTR) WNEF_GENERATE_WINAPI(GetClassLongPtrW, ULONG_PTR, HWND, int) WNEF_GENERATE_WINAPI(SetClassLongPtrW, ULONG_PTR, HWND, int, LONG_PTR) #else #ifdef LONG_PTR #undef LONG_PTR #endif #define LONG_PTR LONG WNEF_GENERATE_WINAPI(GetWindowLongW, LONG_PTR, HWND, int) WNEF_GENERATE_WINAPI(SetWindowLongW, LONG_PTR, HWND, int, LONG_PTR) #define m_lpGetWindowLongPtrW m_lpGetWindowLongW #define m_lpSetWindowLongPtrW m_lpSetWindowLongW #ifdef GWLP_USERDATA #undef GWLP_USERDATA #endif #define GWLP_USERDATA GWL_USERDATA WNEF_GENERATE_WINAPI(GetClassLongW, DWORD, HWND, int) WNEF_GENERATE_WINAPI(SetClassLongW, DWORD, HWND, int, LONG_PTR) #define m_lpGetClassLongPtrW m_lpGetClassLongW #define m_lpSetClassLongPtrW m_lpSetClassLongW #ifdef GCLP_HBRBACKGROUND #undef GCLP_HBRBACKGROUND #endif #define GCLP_HBRBACKGROUND GCL_HBRBACKGROUND #endif WNEF_GENERATE_WINAPI(FindWindowW, HWND, LPCWSTR, LPCWSTR) WNEF_GENERATE_WINAPI(MonitorFromWindow, HMONITOR, HWND, DWORD) WNEF_GENERATE_WINAPI(GetMonitorInfoW, BOOL, HMONITOR, LPMONITORINFO) WNEF_GENERATE_WINAPI(GetAncestor, HWND, HWND, UINT) WNEF_GENERATE_WINAPI(GetDesktopWindow, HWND) WNEF_GENERATE_WINAPI(SendMessageW, LRESULT, HWND, UINT, WPARAM, LPARAM) WNEF_GENERATE_WINAPI(SetWindowPos, BOOL, HWND, HWND, int, int, int, int, UINT) WNEF_GENERATE_WINAPI(UpdateWindow, BOOL, HWND) WNEF_GENERATE_WINAPI(InvalidateRect, BOOL, HWND, CONST RECT *, BOOL) WNEF_GENERATE_WINAPI(SetWindowRgn, int, HWND, HRGN, BOOL) WNEF_GENERATE_WINAPI(IsWindow, BOOL, HWND) WNEF_GENERATE_WINAPI(GetWindowInfo, BOOL, HWND, LPWINDOWINFO) WNEF_GENERATE_WINAPI(CreateSolidBrush, HBRUSH, COLORREF) WNEF_GENERATE_WINAPI(FillRect, int, HDC, CONST RECT *, HBRUSH) WNEF_GENERATE_WINAPI(DeleteObject, BOOL, HGDIOBJ) WNEF_GENERATE_WINAPI(IsThemeActive, BOOL) WNEF_GENERATE_WINAPI(BeginPaint, HDC, HWND, LPPAINTSTRUCT) WNEF_GENERATE_WINAPI(EndPaint, BOOL, HWND, CONST PAINTSTRUCT *) WNEF_GENERATE_WINAPI(GetCurrentProcess, HANDLE) WNEF_GENERATE_WINAPI(IsProcessDPIAware, BOOL) #if 0 WNEF_GENERATE_WINAPI(D2D1CreateFactory, HRESULT, D2D1_FACTORY_TYPE, REFIID, CONST D2D1_FACTORY_OPTIONS *, void **) #endif WNEF_GENERATE_WINAPI(AdjustWindowRectEx, BOOL, LPRECT, DWORD, BOOL, DWORD) WNEF_GENERATE_WINAPI(DwmDefWindowProc, BOOL, HWND, UINT, WPARAM, LPARAM, LRESULT *) WNEF_GENERATE_WINAPI(DwmGetWindowAttribute, HRESULT, HWND, DWORD, PVOID, DWORD) WNEF_GENERATE_WINAPI(GetStockObject, HGDIOBJ, int) WNEF_GENERATE_WINAPI(BufferedPaintSetAlpha, HRESULT, HPAINTBUFFER, CONST RECT *, BYTE) WNEF_GENERATE_WINAPI(EndBufferedPaint, HRESULT, HPAINTBUFFER, BOOL) WNEF_GENERATE_WINAPI( BeginBufferedPaint, HPAINTBUFFER, HDC, CONST RECT *, BP_BUFFERFORMAT, BP_PAINTPARAMS *, HDC *) WNEF_GENERATE_WINAPI(CreateRectRgnIndirect, HRGN, CONST RECT *) WNEF_GENERATE_WINAPI(GetDCEx, HDC, HWND, HRGN, DWORD) WNEF_GENERATE_WINAPI(GetWindowDC, HDC, HWND) WNEF_GENERATE_WINAPI(OffsetRect, BOOL, LPRECT, int, int) #endif WNEF_GENERATE_WINAPI(GetDpiForMonitor, HRESULT, HMONITOR, MONITOR_DPI_TYPE, UINT *, UINT *) WNEF_GENERATE_WINAPI(GetProcessDpiAwareness, HRESULT, HANDLE, PROCESS_DPI_AWARENESS *) WNEF_GENERATE_WINAPI(GetSystemDpiForProcess, UINT, HANDLE) WNEF_GENERATE_WINAPI(GetDpiForWindow, UINT, HWND) WNEF_GENERATE_WINAPI(GetDpiForSystem, UINT) WNEF_GENERATE_WINAPI(GetSystemMetricsForDpi, int, int, UINT) WNEF_GENERATE_WINAPI(AdjustWindowRectExForDpi, BOOL, LPRECT, DWORD, BOOL, DWORD, UINT) void loadDPIFunctions() { static bool resolved = false; if (resolved) { // Don't resolve twice. return; } resolved = true; // Available since Windows 8.1 if (isWin8Point1OrGreator()) { WNEF_RESOLVE_WINAPI(SHCore, GetDpiForMonitor) WNEF_RESOLVE_WINAPI(SHCore, GetProcessDpiAwareness) } // Available since Windows 10, version 1607 (10.0.14393) if (isWin10OrGreator(14393)) { WNEF_RESOLVE_WINAPI(User32, GetDpiForWindow) WNEF_RESOLVE_WINAPI(User32, GetDpiForSystem) WNEF_RESOLVE_WINAPI(User32, GetSystemMetricsForDpi) WNEF_RESOLVE_WINAPI(User32, AdjustWindowRectExForDpi) } // Available since Windows 10, version 1803 (10.0.17134) if (isWin10OrGreator(17134)) { WNEF_RESOLVE_WINAPI(User32, GetSystemDpiForProcess) } } #ifdef WNEF_LINK_SYSLIB void ResolveWin32APIs() { static bool resolved = false; if (resolved) { // Don't resolve twice. return; } resolved = true; loadDPIFunctions(); } #else // Some APIs are not available on old systems, so we will load them // dynamically at run-time to get maximum compatibility. void ResolveWin32APIs() { static bool resolved = false; if (resolved) { // Don't resolve twice. return; } resolved = true; // Available since Windows 2000. WNEF_RESOLVE_WINAPI(User32, OffsetRect) WNEF_RESOLVE_WINAPI(User32, GetWindowDC) WNEF_RESOLVE_WINAPI(User32, GetDCEx) WNEF_RESOLVE_WINAPI(User32, AdjustWindowRectEx) WNEF_RESOLVE_WINAPI(User32, EndPaint) WNEF_RESOLVE_WINAPI(User32, BeginPaint) WNEF_RESOLVE_WINAPI(User32, FillRect) WNEF_RESOLVE_WINAPI(User32, GetWindowInfo) WNEF_RESOLVE_WINAPI(User32, IsWindow) WNEF_RESOLVE_WINAPI(User32, SetWindowRgn) WNEF_RESOLVE_WINAPI(User32, InvalidateRect) WNEF_RESOLVE_WINAPI(User32, UpdateWindow) WNEF_RESOLVE_WINAPI(User32, SetWindowPos) WNEF_RESOLVE_WINAPI(User32, SendMessageW) WNEF_RESOLVE_WINAPI(User32, GetDesktopWindow) WNEF_RESOLVE_WINAPI(User32, GetAncestor) WNEF_RESOLVE_WINAPI(User32, DefWindowProcW) WNEF_RESOLVE_WINAPI(User32, SetLayeredWindowAttributes) WNEF_RESOLVE_WINAPI(User32, MoveWindow) WNEF_RESOLVE_WINAPI(User32, IsZoomed) WNEF_RESOLVE_WINAPI(User32, IsIconic) WNEF_RESOLVE_WINAPI(User32, GetSystemMetrics) WNEF_RESOLVE_WINAPI(User32, GetDC) WNEF_RESOLVE_WINAPI(User32, ReleaseDC) WNEF_RESOLVE_WINAPI(User32, RedrawWindow) WNEF_RESOLVE_WINAPI(User32, GetClientRect) WNEF_RESOLVE_WINAPI(User32, GetWindowRect) WNEF_RESOLVE_WINAPI(User32, ScreenToClient) WNEF_RESOLVE_WINAPI(User32, EqualRect) #if defined(WIN64) || defined(_WIN64) // These functions only exist in 64 bit User32.dll WNEF_RESOLVE_WINAPI(User32, GetWindowLongPtrW) WNEF_RESOLVE_WINAPI(User32, SetWindowLongPtrW) WNEF_RESOLVE_WINAPI(User32, GetClassLongPtrW) WNEF_RESOLVE_WINAPI(User32, SetClassLongPtrW) #else WNEF_RESOLVE_WINAPI(User32, GetWindowLongW) WNEF_RESOLVE_WINAPI(User32, SetWindowLongW) WNEF_RESOLVE_WINAPI(User32, GetClassLongW) WNEF_RESOLVE_WINAPI(User32, SetClassLongW) #endif WNEF_RESOLVE_WINAPI(User32, FindWindowW) WNEF_RESOLVE_WINAPI(User32, MonitorFromWindow) WNEF_RESOLVE_WINAPI(User32, GetMonitorInfoW) WNEF_RESOLVE_WINAPI(Gdi32, GetDeviceCaps) WNEF_RESOLVE_WINAPI(Gdi32, CreateSolidBrush) WNEF_RESOLVE_WINAPI(Gdi32, DeleteObject) WNEF_RESOLVE_WINAPI(Gdi32, GetStockObject) WNEF_RESOLVE_WINAPI(Gdi32, CreateRectRgnIndirect) // Available since Windows XP. WNEF_RESOLVE_WINAPI(Shell32, SHAppBarMessage) WNEF_RESOLVE_WINAPI(Kernel32, GetCurrentProcess) // Available since Windows Vista. WNEF_RESOLVE_WINAPI(User32, IsProcessDPIAware) WNEF_RESOLVE_WINAPI(Dwmapi, DwmGetWindowAttribute) WNEF_RESOLVE_WINAPI(Dwmapi, DwmIsCompositionEnabled) WNEF_RESOLVE_WINAPI(Dwmapi, DwmExtendFrameIntoClientArea) WNEF_RESOLVE_WINAPI(Dwmapi, DwmSetWindowAttribute) WNEF_RESOLVE_WINAPI(Dwmapi, DwmDefWindowProc) WNEF_RESOLVE_WINAPI(UxTheme, IsThemeActive) WNEF_RESOLVE_WINAPI(UxTheme, BufferedPaintSetAlpha) WNEF_RESOLVE_WINAPI(UxTheme, EndBufferedPaint) WNEF_RESOLVE_WINAPI(UxTheme, BeginBufferedPaint) // Available since Windows 7. #if 0 WNEF_RESOLVE_WINAPI(D2D1, D2D1CreateFactory) #endif loadDPIFunctions(); } #endif BOOL IsDwmCompositionEnabled() { // Since Win8, DWM composition is always enabled and can't be disabled. // In other words, DwmIsCompositionEnabled will always return TRUE on // systems newer than Win7. BOOL enabled = FALSE; return SUCCEEDED(WNEF_EXECUTE_WINAPI_RETURN(DwmIsCompositionEnabled, E_FAIL, &enabled)) && enabled; } WINDOWINFO GetInfoForWindow(const HWND handle) { WINDOWINFO windowInfo; SecureZeroMemory(&windowInfo, sizeof(windowInfo)); windowInfo.cbSize = sizeof(windowInfo); if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { WNEF_EXECUTE_WINAPI(GetWindowInfo, handle, &windowInfo) } return windowInfo; } MONITORINFO GetMonitorInfoForWindow(const HWND handle) { MONITORINFO monitorInfo; SecureZeroMemory(&monitorInfo, sizeof(monitorInfo)); monitorInfo.cbSize = sizeof(monitorInfo); if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { const HMONITOR monitor = WNEF_EXECUTE_WINAPI_RETURN(MonitorFromWindow, nullptr, handle, MONITOR_DEFAULTTONEAREST); if (monitor) { WNEF_EXECUTE_WINAPI(GetMonitorInfoW, monitor, &monitorInfo) } } return monitorInfo; } BOOL IsFullScreen(const HWND handle) { if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { const WINDOWINFO windowInfo = GetInfoForWindow(handle); const MONITORINFO monitorInfo = GetMonitorInfoForWindow(handle); // The only way to judge whether a window is fullscreen or not // is to compare it's size with the screen's size, there is no official // Win32 API to do this for us. return WNEF_EXECUTE_WINAPI_RETURN(EqualRect, FALSE, &windowInfo.rcWindow, &monitorInfo.rcMonitor) || WNEF_EXECUTE_WINAPI_RETURN(EqualRect, FALSE, &windowInfo.rcClient, &monitorInfo.rcMonitor); } return FALSE; } BOOL IsTopLevel(const HWND handle) { if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { if (WNEF_EXECUTE_WINAPI_RETURN(GetWindowLongPtrW, 0, handle, GWL_STYLE) & WS_CHILD) { return FALSE; } const HWND parent = WNEF_EXECUTE_WINAPI_RETURN(GetAncestor, nullptr, handle, GA_PARENT); if (parent && (parent != WNEF_EXECUTE_WINAPI_RETURN(GetDesktopWindow, nullptr))) { return FALSE; } return TRUE; } return FALSE; } UINT GetDotsPerInchForWindow(const HWND handle) { const auto getScreenDpi = [](const UINT defaultValue) -> UINT { #if 0 if (m_lpD2D1CreateFactory) { // Using Direct2D to get the screen DPI. // Available since Windows 7. ID2D1Factory *m_pDirect2dFactory = nullptr; if (SUCCEEDED(m_lpD2D1CreateFactory( D2D1_FACTORY_TYPE_SINGLE_THREADED, __uuidof(ID2D1Factory), nullptr, reinterpret_cast(&m_pDirect2dFactory))) && m_pDirect2dFactory) { m_pDirect2dFactory->ReloadSystemMetrics(); FLOAT dpiX = defaultValue, dpiY = defaultValue; m_pDirect2dFactory->GetDesktopDpi(&dpiX, &dpiY); // The values of *dpiX and *dpiY are identical. return qRound(dpiX); } } #endif // Available since Windows 2000. const HDC hdc = WNEF_EXECUTE_WINAPI_RETURN(GetDC, nullptr, nullptr); if (hdc) { const int dpiX = WNEF_EXECUTE_WINAPI_RETURN(GetDeviceCaps, 0, hdc, LOGPIXELSX); const int dpiY = WNEF_EXECUTE_WINAPI_RETURN(GetDeviceCaps, 0, hdc, LOGPIXELSY); WNEF_EXECUTE_WINAPI(ReleaseDC, nullptr, hdc) // The values of dpiX and dpiY are identical actually, just to // silence a compiler warning. return dpiX == dpiY ? dpiY : dpiX; } return defaultValue; }; bool dpiEnabled = false; if (m_lpGetProcessDpiAwareness) { PROCESS_DPI_AWARENESS awareness = PROCESS_DPI_UNAWARE; WNEF_EXECUTE_WINAPI(GetProcessDpiAwareness, WNEF_EXECUTE_WINAPI_RETURN(GetCurrentProcess, nullptr), &awareness) dpiEnabled = awareness != PROCESS_DPI_UNAWARE; } else { dpiEnabled = WNEF_EXECUTE_WINAPI_RETURN(IsProcessDPIAware, FALSE); } if (!dpiEnabled) { // Return hard-coded DPI if DPI scaling is disabled. return m_defaultDotsPerInch; } if (!handle || !WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { if (m_lpGetSystemDpiForProcess) { return WNEF_EXECUTE_WINAPI_RETURN(GetSystemDpiForProcess, 0, WNEF_EXECUTE_WINAPI_RETURN(GetCurrentProcess, nullptr)); } else if (m_lpGetDpiForSystem) { return WNEF_EXECUTE_WINAPI_RETURN(GetDpiForSystem, 0); } return getScreenDpi(m_defaultDotsPerInch); } if (m_lpGetDpiForWindow) { return WNEF_EXECUTE_WINAPI_RETURN(GetDpiForWindow, 0, handle); } if (m_lpGetDpiForMonitor) { UINT dpiX = m_defaultDotsPerInch, dpiY = m_defaultDotsPerInch; WNEF_EXECUTE_WINAPI(GetDpiForMonitor, WNEF_EXECUTE_WINAPI_RETURN(MonitorFromWindow, nullptr, handle, MONITOR_DEFAULTTONEAREST), MDT_EFFECTIVE_DPI, &dpiX, &dpiY) // The values of *dpiX and *dpiY are identical. return dpiX; } return getScreenDpi(m_defaultDotsPerInch); } qreal GetPreferedNumber(const qreal num) { qreal result = -1.0; const auto getRoundedNumber = [](const qreal in) -> qreal { // If the given number is not very large, we assume it's a // device pixel ratio (DPR), otherwise we assume it's a DPI. if (in < m_defaultDotsPerInch) { return qRound(in); } else { if (in < (m_defaultDotsPerInch * 1.5)) { return m_defaultDotsPerInch; } else if (in < (m_defaultDotsPerInch * 2.5)) { return m_defaultDotsPerInch * 2; } else if (in < (m_defaultDotsPerInch * 3.5)) { return m_defaultDotsPerInch * 3; } else if (in < (m_defaultDotsPerInch * 4.5)) { return m_defaultDotsPerInch * 4; } else if (in < (m_defaultDotsPerInch * 5.5)) { return m_defaultDotsPerInch * 5; } else { qWarning().noquote() << "DPI too large:" << static_cast(in); } } return -1.0; }; #if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)) switch (QGuiApplication::highDpiScaleFactorRoundingPolicy()) { case Qt::HighDpiScaleFactorRoundingPolicy::PassThrough: // Default behavior for Qt 6. result = num; break; case Qt::HighDpiScaleFactorRoundingPolicy::Floor: result = qFloor(num); break; case Qt::HighDpiScaleFactorRoundingPolicy::Ceil: result = qCeil(num); break; default: // Default behavior for Qt 5.6 to 5.15 result = getRoundedNumber(num); break; } #else // Default behavior for Qt 5.6 to 5.15 result = getRoundedNumber(num); #endif return result; } qreal GetDevicePixelRatioForWindow(const HWND handle) { qreal result = m_defaultDevicePixelRatio; if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { result = static_cast(GetDotsPerInchForWindow(handle)) / static_cast(m_defaultDotsPerInch); } return GetPreferedNumber(result); } RECT GetFrameSizeForWindow(const HWND handle, const bool includingTitleBar = false) { RECT rect = {0, 0, 0, 0}; if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { const auto style = WNEF_EXECUTE_WINAPI_RETURN(GetWindowLongPtrW, 0, handle, GWL_STYLE); // It's the same with using GetSystemMetrics, the returned values // of the two functions are identical. if (m_lpAdjustWindowRectExForDpi) { WNEF_EXECUTE_WINAPI(AdjustWindowRectExForDpi, &rect, includingTitleBar ? (style | WS_CAPTION) : (style & ~WS_CAPTION), FALSE, WNEF_EXECUTE_WINAPI_RETURN(GetWindowLongPtrW, 0, handle, GWL_EXSTYLE), GetDotsPerInchForWindow(handle)) } else { WNEF_EXECUTE_WINAPI(AdjustWindowRectEx, &rect, includingTitleBar ? (style | WS_CAPTION) : (style & ~WS_CAPTION), FALSE, WNEF_EXECUTE_WINAPI_RETURN(GetWindowLongPtrW, 0, handle, GWL_EXSTYLE)) const qreal dpr = GetDevicePixelRatioForWindow(handle); rect.top = qRound(rect.top * dpr); rect.bottom = qRound(rect.bottom * dpr); rect.left = qRound(rect.left * dpr); rect.right = qRound(rect.right * dpr); } // Some values may be negative. Make them positive unconditionally. rect.top = qAbs(rect.top); rect.bottom = qAbs(rect.bottom); rect.left = qAbs(rect.left); rect.right = qAbs(rect.right); } return rect; } void UpdateFrameMarginsForWindow(const HWND handle) { if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { MARGINS margins = {0, 0, 0, 0}; if (IsDwmCompositionEnabled()) { // The frame shadow is drawn on the non-client area and thus we have // to make sure the non-client area rendering is enabled first. const DWMNCRENDERINGPOLICY ncrp = DWMNCRP_ENABLED; WNEF_EXECUTE_WINAPI(DwmSetWindowAttribute, handle, DWMWA_NCRENDERING_POLICY, &ncrp, sizeof(ncrp)) // Use negative values have the same effect, however, it will // cause the window become transparent when it's maximizing or // restoring from maximized. Just like flashing. Fixing it by // passing positive values. // The system won't draw the frame shadow if the window doesn't // have a frame, so we have to extend the frame a bit to let the // system draw the shadow. We won't see any frame even we have // extended it because we have turned the whole window area into // the client area in WM_NCCALCSIZE so we won't see it due to // it's covered by the client area (in other words, it's still // there, we just can't see it). margins.cyTopHeight = 1; } WNEF_EXECUTE_WINAPI(DwmExtendFrameIntoClientArea, handle, &margins) } } int GetSystemMetricsForWindow(const HWND handle, const int index) { if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { if (m_lpGetSystemMetricsForDpi) { return WNEF_EXECUTE_WINAPI_RETURN(GetSystemMetricsForDpi, 0, index, static_cast(qRound(GetPreferedNumber( GetDotsPerInchForWindow(handle))))); } else { return qRound(WNEF_EXECUTE_WINAPI_RETURN(GetSystemMetrics, 0, index) * GetDevicePixelRatioForWindow(handle)); } } return -1; } void createUserData(const HWND handle, const WinNativeEventFilter::WINDOWDATA *data = nullptr) { if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { const auto userData = reinterpret_cast( WNEF_EXECUTE_WINAPI_RETURN(GetWindowLongPtrW, 0, handle, GWLP_USERDATA)); if (userData) { if (data) { userData->windowData = *data; } } else { // Yes, this is a memory leak, but it doesn't hurt much, unless your // application has thousands of windows. WinNativeEventFilter::WINDOW *_data = new WinNativeEventFilter::WINDOW; if (data) { _data->windowData = *data; } WNEF_EXECUTE_WINAPI(SetWindowLongPtrW, handle, GWLP_USERDATA, reinterpret_cast(_data)) WinNativeEventFilter::updateWindow(handle, true, false); } } } QWindow *findQWindowFromRawHandle(const HWND handle) { if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { const auto wid = reinterpret_cast(handle); const auto windows = QGuiApplication::topLevelWindows(); for (auto &&window : qAsConst(windows)) { if (window && window->handle()) { if (window->winId() == wid) { return window; } } } } return nullptr; } void qCoreAppFixup() { if (!QCoreApplication::testAttribute(Qt::AA_DontCreateNativeWidgetSiblings)) { QCoreApplication::setAttribute(Qt::AA_DontCreateNativeWidgetSiblings); } } // The standard values of border width, border height and title bar height // when DPI is 96. const int m_defaultBorderWidth = 8, m_defaultBorderHeight = 8, m_defaultTitleBarHeight = 30; int m_borderWidth = -1, m_borderHeight = -1, m_titleBarHeight = -1; // The thickness of an auto-hide taskbar in pixels. const int kAutoHideTaskbarThicknessPx = 2; const int kAutoHideTaskbarThicknessPy = kAutoHideTaskbarThicknessPx; QScopedPointer m_instance; QList m_framelessWindows; } // namespace WinNativeEventFilter::WinNativeEventFilter() { ResolveWin32APIs(); qCoreAppFixup(); } WinNativeEventFilter::~WinNativeEventFilter() = default; void WinNativeEventFilter::install() { qCoreAppFixup(); if (m_instance.isNull()) { m_instance.reset(new WinNativeEventFilter); qApp->installNativeEventFilter(m_instance.data()); } } void WinNativeEventFilter::uninstall() { if (!m_instance.isNull()) { qApp->removeNativeEventFilter(m_instance.data()); m_instance.reset(); } if (!m_framelessWindows.isEmpty()) { m_framelessWindows.clear(); } } QList WinNativeEventFilter::framelessWindows() { return m_framelessWindows; } void WinNativeEventFilter::setFramelessWindows(const QList &windows) { qCoreAppFixup(); if (!windows.isEmpty() && (windows != m_framelessWindows)) { m_framelessWindows = windows; for (auto &&window : qAsConst(m_framelessWindows)) { createUserData(window); updateQtFrame_internal(window); } install(); } } void WinNativeEventFilter::addFramelessWindow(const HWND window, const WINDOWDATA *data, const bool center, const int x, const int y, const int width, const int height) { ResolveWin32APIs(); qCoreAppFixup(); if (window && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, window) && !m_framelessWindows.contains(window)) { m_framelessWindows.append(window); createUserData(window, data); install(); updateQtFrame_internal(window); } if ((x > 0) && (y > 0) && (width > 0) && (height > 0)) { setWindowGeometry(window, x, y, width, height); } if (center) { moveWindowToDesktopCenter(window); } } void WinNativeEventFilter::removeFramelessWindow(const HWND window) { if (window && m_framelessWindows.contains(window)) { m_framelessWindows.removeAll(window); } } void WinNativeEventFilter::clearFramelessWindows() { if (!m_framelessWindows.isEmpty()) { m_framelessWindows.clear(); } } #if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)) bool WinNativeEventFilter::nativeEventFilter(const QByteArray &eventType, void *message, qintptr *result) #else bool WinNativeEventFilter::nativeEventFilter(const QByteArray &eventType, void *message, long *result) #endif { // "result" can't be null in theory and I don't see any projects check // this, everyone is assuming it will never be null, including Microsoft, // but according to Lucas, frameless applications crashed on many Win7 // machines because it's null. The temporary solution is also strange: // upgrade drivers or switch to the basic theme. if (!result) { return false; } // The example code in Qt's documentation has this check. I don't know // whether we really need this check or not, but adding this check won't // bring us harm anyway. if (eventType == "windows_generic_MSG") { #if (QT_VERSION == QT_VERSION_CHECK(5, 11, 1)) // Work-around a bug caused by typo which only exists in Qt 5.11.1 const auto msg = *reinterpret_cast(message); #else const auto msg = static_cast(message); #endif if (!msg || (msg && !msg->hwnd)) { // Why sometimes the window handle is null? Is it designed to be? // Anyway, we should skip it in this case. return false; } if (m_framelessWindows.isEmpty()) { // Only top level windows can be frameless. if (!IsTopLevel(msg->hwnd)) { return false; } } else if (!m_framelessWindows.contains(msg->hwnd)) { return false; } const auto data = reinterpret_cast( WNEF_EXECUTE_WINAPI_RETURN(GetWindowLongPtrW, 0, msg->hwnd, GWLP_USERDATA)); if (!data) { // Work-around a long existing Windows bug. // Overlapped windows will receive a WM_GETMINMAXINFO message before // WM_NCCREATE. This is safe to ignore. It doesn't need any special // handling anyway. if (msg->message == WM_NCCREATE) { const auto userData = reinterpret_cast(msg->lParam)->lpCreateParams; WNEF_EXECUTE_WINAPI(SetWindowLongPtrW, msg->hwnd, GWLP_USERDATA, reinterpret_cast(userData)) // Copied from MSDN without any modification: // If you have changed certain window data using SetWindowLong, // you must call SetWindowPos for the changes to take effect. // Use the following combination for uFlags: SWP_NOMOVE | // SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED. updateWindow(msg->hwnd, true, false); } *result = WNEF_EXECUTE_WINAPI_RETURN(DefWindowProcW, 0, msg->hwnd, msg->message, msg->wParam, msg->lParam); return false; } if (!data->initialized) { // Avoid initializing a same window twice. data->initialized = TRUE; // Don't restore the window styles to default when you are // developing Qt Quick applications because the QWindow // will disappear once you do it. However, Qt Widgets applications // are not affected. Don't know why currently. if (data->windowData.restoreDefaultWindowStyle) { // Restore default window style. // WS_OVERLAPPEDWINDOW = WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU // | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX // Apply the WS_OVERLAPPEDWINDOW window style to restore the // window to a normal native Win32 window. // Don't apply the Qt::FramelessWindowHint flag, it will add // the WS_POPUP window style to the window, which will turn // the window into a popup window, losing all the functions // a normal window should have. // WS_CLIPCHILDREN | WS_CLIPSIBLINGS: work-around strange bugs. WNEF_EXECUTE_WINAPI(SetWindowLongPtrW, msg->hwnd, GWL_STYLE, WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS) updateWindow(msg->hwnd, true, false); } if (data->windowData.enableLayeredWindow) { // Turn our window into a layered window to get better // performance and hopefully, to get rid of some strange bugs at // the same time. But this will break the Arcylic effect // (introduced in Win10 1709), if you use the undocumented API // SetWindowCompositionAttribute to enable it for this window, // the whole window will become totally black. Don't know why // currently. WNEF_EXECUTE_WINAPI(SetWindowLongPtrW, msg->hwnd, GWL_EXSTYLE, WNEF_EXECUTE_WINAPI_RETURN(GetWindowLongPtrW, 0, msg->hwnd, GWL_EXSTYLE) | WS_EX_LAYERED) updateWindow(msg->hwnd, true, false); // A layered window can't be visible unless we call // SetLayeredWindowAttributes or UpdateLayeredWindow once. WNEF_EXECUTE_WINAPI(SetLayeredWindowAttributes, msg->hwnd, RGB(255, 0, 255), 0, LWA_COLORKEY) } // Bring our frame shadow back through DWM, don't draw it manually. UpdateFrameMarginsForWindow(msg->hwnd); } switch (msg->message) { case WM_NCCALCSIZE: { // Windows是根据这个消息的返回值来设置窗口的客户区（窗口中真正显示的内容） // 和非客户区（标题栏、窗口边框、菜单栏和状态栏等Windows系统自行提供的部分 // ，不过对于Qt来说，除了标题栏和窗口边框，非客户区基本也都是自绘的）的范 // 围的，lParam里存放的就是新客户区的几何区域，默认是整个窗口的大小，正常 // 的程序需要修改这个参数，告知系统窗口的客户区和非客户区的范围（一般来说可 // 以完全交给Windows，让其自行处理，使用默认的客户区和非客户区），因此如果 // 我们不修改lParam，就可以使客户区充满整个窗口，从而去掉标题栏和窗口边框 // （因为这些东西都被客户区给盖住了。但边框阴影也会因此而丢失，不过我们会使 // 用其他方式将其带回，请参考其他消息的处理，此处不过多提及）。但有个情况要 // 特别注意，那就是窗口最大化后，窗口的实际尺寸会比屏幕的尺寸大一点，从而使 // 用户看不到窗口的边界，这样用户就不能在窗口最大化后调整窗口的大小了（虽然 // 这个做法听起来特别奇怪，但Windows确实就是这样做的），因此如果我们要自行 // 处理窗口的非客户区，就要在窗口最大化后，将窗口边框的宽度和高度（一般是相 // 等的）从客户区裁剪掉，否则我们窗口所显示的内容就会超出屏幕边界，显示不全。 // 如果用户开启了任务栏自动隐藏，在窗口最大化后，还要考虑任务栏的位置。因为 // 如果窗口最大化后，其尺寸和屏幕尺寸相等（因为任务栏隐藏了，所以窗口最大化 // 后其实是充满了整个屏幕，变相的全屏了），Windows会认为窗口已经进入全屏的 // 状态，从而导致自动隐藏的任务栏无法弹出。要避免这个状况，就要使窗口的尺寸 // 小于屏幕尺寸。我下面的做法参考了火狐、Chromium和Windows Terminal // 如果没有开启任务栏自动隐藏，是不存在这个问题的，所以要先进行判断。 // 一般情况下，*result设置为0（相当于DefWindowProc的返回值为0）就可以了， // 根据MSDN的说法，返回0意为此消息已经被程序自行处理了，让Windows跳过此消 // 息，否则Windows会添加对此消息的默认处理，对于当前这个消息而言，就意味着 // 标题栏和窗口边框又会回来，这当然不是我们想要的结果。根据MSDN，当wParam // 为FALSE时，只能返回0，但当其为TRUE时，可以返回0，也可以返回一个WVR_常 // 量。根据Chromium的注释，当存在非客户区时，如果返回WVR_REDRAW会导致子 // 窗口/子控件出现奇怪的bug（自绘控件错位），并且Lucas在Windows 10 // 上成功复现，说明这个bug至今都没有解决。我查阅了大量资料，发现唯一的解决 // 方案就是返回0。但如果不存在非客户区，且wParam为TRUE，最好返回 // WVR_REDRAW，否则窗口在调整大小可能会产生严重的闪烁现象。 // 虽然对大多数消息来说，返回0都代表让Windows忽略此消息，但实际上不同消息 // 能接受的返回值是不一样的，请注意自行查阅MSDN。 // Sent when the size and position of a window's client area must be // calculated. By processing this message, an application can // control the content of the window's client area when the size or // position of the window changes. If wParam is TRUE, lParam points // to an NCCALCSIZE_PARAMS structure that contains information an // application can use to calculate the new size and position of the // client rectangle. If wParam is FALSE, lParam points to a RECT // structure. On entry, the structure contains the proposed window // rectangle for the window. On exit, the structure should contain // the screen coordinates of the corresponding window client area. // The client area is the window's content area, the non-client area // is the area which is provided by the system, such as the title // bar, the four window borders, the frame shadow, the menu bar, the // status bar, the scroll bar, etc. But for Qt, it draws most of the // window area (client + non-client) itself. We now know that the // title bar and the window frame is in the non-client area and we // can set the scope of the client area in this message, so we can // remove the title bar and the window frame by let the non-client // area be covered by the client area (because we can't really get // rid of the non-client area, it will always be there, all we can // do is to hide it) , which means we should let the client area's // size the same with the whole window's size. So there is no room // for the non-client area and then the user won't be able to see it // again. But how to achieve this? Very easy, just leave lParam (the // re-calculated client area) untouched. But of course you can // modify lParam, then the non-client area will be seen and the // window borders and the window frame will show up. However, things // are quite different when you try to modify the top margin of the // client area. DWM will always draw the whole title bar no matter // what margin value you set for the top, unless you don't modify it // and remove the whole top area (the title bar + the one pixel // height window border). This can be confirmed in Windows // Terminal's source code, you can also try yourself to verify // it. So things will become quite complicated if you want to // preserve the four window borders. So we just remove the whole // window frame, otherwise the code will become much more complex. const auto mode = static_cast(msg->wParam); // If the window bounds change, we're going to relayout and repaint // anyway. Returning WVR_REDRAW avoids an extra paint before that of // the old client pixels in the (now wrong) location, and thus makes // actions like resizing a window from the left edge look slightly // less broken. *result = mode ? WVR_REDRAW : 0; const auto clientRect = mode ? &( reinterpret_cast(msg->lParam)->rgrc[0]) : reinterpret_cast(msg->lParam); // We don't need this correction when we're fullscreen. We will // have the WS_POPUP size, so we don't have to worry about // borders, and the default frame will be fine. if (IsMaximized(msg->hwnd) && !IsFullScreen(msg->hwnd)) { // Windows automatically adds a standard width border to all // sides when a window is maximized. We have to remove it // otherwise the content of our window will be cut-off from // the screen. // The value of border width and border height should be // identical in most cases, when the scale factor is 1.0, it // should be eight pixels. const int bw = getSystemMetric(msg->hwnd, SystemMetric::BorderWidth, true); const int bh = getSystemMetric(msg->hwnd, SystemMetric::BorderHeight, true); clientRect->top += bh; clientRect->bottom -= bh; clientRect->left += bw; clientRect->right -= bw; } // Attempt to detect if there's an autohide taskbar, and if // there is, reduce our size a bit on the side with the taskbar, // so the user can still mouse-over the taskbar to reveal it. // Make sure to use MONITOR_DEFAULTTONEAREST, so that this will // still find the right monitor even when we're restoring from // minimized. if (IsMaximized(msg->hwnd)) { APPBARDATA abd; SecureZeroMemory(&abd, sizeof(abd)); abd.cbSize = sizeof(abd); const UINT taskbarState = WNEF_EXECUTE_WINAPI_RETURN(SHAppBarMessage, 0, ABM_GETSTATE, &abd); // First, check if we have an auto-hide taskbar at all: if (taskbarState & ABS_AUTOHIDE) { bool top = false, bottom = false, left = false, right = false; // Due to ABM_GETAUTOHIDEBAREX only exists from Win8.1, // we have to use another way to judge this if we are // running on Windows 7 or Windows 8. if (isWin8Point1OrGreator()) { const MONITORINFO monitorInfo = GetMonitorInfoForWindow(msg->hwnd); // This helper can be used to determine if there's a // auto-hide taskbar on the given edge of the monitor // we're currently on. const auto hasAutohideTaskbar = [&monitorInfo](const UINT edge) -> bool { APPBARDATA _abd; SecureZeroMemory(&_abd, sizeof(_abd)); _abd.cbSize = sizeof(_abd); _abd.uEdge = edge; _abd.rc = monitorInfo.rcMonitor; const auto hTaskbar = reinterpret_cast( WNEF_EXECUTE_WINAPI_RETURN(SHAppBarMessage, 0, ABM_GETAUTOHIDEBAREX, &_abd)); return hTaskbar != nullptr; }; top = hasAutohideTaskbar(ABE_TOP); bottom = hasAutohideTaskbar(ABE_BOTTOM); left = hasAutohideTaskbar(ABE_LEFT); right = hasAutohideTaskbar(ABE_RIGHT); } else { // The following code is copied from Mozilla Firefox, // with some modifications. int edge = -1; APPBARDATA _abd; SecureZeroMemory(&_abd, sizeof(_abd)); _abd.cbSize = sizeof(_abd); _abd.hWnd = WNEF_EXECUTE_WINAPI_RETURN(FindWindowW, nullptr, L"Shell_TrayWnd", nullptr); if (_abd.hWnd) { const HMONITOR windowMonitor = WNEF_EXECUTE_WINAPI_RETURN(MonitorFromWindow, nullptr, msg->hwnd, MONITOR_DEFAULTTONEAREST); const HMONITOR taskbarMonitor = WNEF_EXECUTE_WINAPI_RETURN(MonitorFromWindow, nullptr, _abd.hWnd, MONITOR_DEFAULTTOPRIMARY); if (taskbarMonitor == windowMonitor) { WNEF_EXECUTE_WINAPI(SHAppBarMessage, ABM_GETTASKBARPOS, &_abd) edge = _abd.uEdge; } } top = edge == ABE_TOP; bottom = edge == ABE_BOTTOM; left = edge == ABE_LEFT; right = edge == ABE_RIGHT; } // If there's a taskbar on any side of the monitor, reduce // our size a little bit on that edge. // Note to future code archeologists: // This doesn't seem to work for fullscreen on the primary // display. However, testing a bunch of other apps with // fullscreen modes and an auto-hiding taskbar has // shown that _none_ of them reveal the taskbar from // fullscreen mode. This includes Edge, Firefox, Chrome, // Sublime Text, PowerPoint - none seemed to support this. // This does however work fine for maximized. if (top) { // Peculiarly, when we're fullscreen, clientRect->top += kAutoHideTaskbarThicknessPy; } else if (bottom) { clientRect->bottom -= kAutoHideTaskbarThicknessPy; } else if (left) { clientRect->left += kAutoHideTaskbarThicknessPx; } else if (right) { clientRect->right -= kAutoHideTaskbarThicknessPx; } } // We cannot return WVR_REDRAW when there is nonclient area, or // Windows exhibits bugs where client pixels and child HWNDs are // mispositioned by the width/height of the upper-left nonclient // area. *result = 0; } return true; } case WM_NCUAHDRAWCAPTION: case WM_NCUAHDRAWFRAME: { // These undocumented messages are sent to draw themed window // borders. Block them to prevent drawing borders over the client // area. *result = 0; return true; } case WM_NCPAINT: { // 边框阴影处于非客户区的范围，因此如果直接阻止非客户区的绘制，会导致边框阴影丢失 if (!IsDwmCompositionEnabled()) { // Only block WM_NCPAINT when DWM composition is disabled. If // it's blocked when DWM composition is enabled, the frame // shadow won't be drawn. *result = 0; return true; } break; } case WM_NCACTIVATE: { if (IsDwmCompositionEnabled()) { // DefWindowProc won't repaint the window border if lParam // (normally a HRGN) is -1. See the following link's "lParam" // section: // https://docs.microsoft.com/en-us/windows/win32/winmsg/wm-ncactivate // Don't use "*result = 0" otherwise the window won't respond to // the window active state change. *result = WNEF_EXECUTE_WINAPI_RETURN(DefWindowProcW, 0, msg->hwnd, msg->message, msg->wParam, -1); } else { if (static_cast(msg->wParam)) { *result = FALSE; } else { *result = TRUE; } } return true; } 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 // 口的左、右和底边添加三个透明的resize区域，这三个区域在正常状态 // 下是完全不可见的，它们由DWM负责绘制和控制。这些区域的宽度等于 // (SM_CXSIZEFRAME + SM_CXPADDEDBORDER)，高度等于 // (SM_CYSIZEFRAME + SM_CXPADDEDBORDER)，在100%缩放时，均等 // 于8像素。它们属于窗口区域的一部分，但不属于客户区，而是属于非客 // 户区，因此GetWindowRect获取的区域中是包含这三个resize区域的， // 而GetClientRect获取的区域是不包含它们的。当把 // DWMWA_EXTENDED_FRAME_BOUNDS作为参数调用 // DwmGetWindowAttribute时，也能获取到一个窗口大小，这个大小介 // 于前面两者之间，暂时不知道这个数据的意义及其作用。我们在 // WM_NCCALCSIZE消息的处理中，已经把整个窗口都设置为客户区了，也 // 就是说，我们的窗口已经没有非客户区了，因此那三个透明的resize区 // 域，此刻也已经成为窗口客户区的一部分了，从而变得不透明了。所以 // 现在的resize，看起来像是在窗口内部resize，是因为原本透明的地方 // 现在变得不透明了，实际上，单纯从范围上来看，现在我们resize的地方， // 就是普通窗口的边框外部，那三个透明区域的范围。 // 因此，如果我们把边框完全去掉（就是我们正在做的事情），resize就 // 会看起来是在内部进行，这个问题通过常规方法非常难以解决。我测试过 // QQ和钉钉的窗口，它们的窗口就是在外部resize，但实际上它们是通过 // 把窗口实际的内容，嵌入到一个完全透明的但尺寸要大一圈的窗口中实现 // 的，虽然看起来效果还行，但在我看来不是正途。而且我之所以能发现， // 也是由于这种方法在很多情况下会露馅，比如窗口未响应卡住或贴边的时 // 候，能明显看到窗口周围多出来一圈边界。我曾经尝试再把那三个区域弄 // 透明，但无一例外都会破坏DWM绘制的边框阴影，因此只好作罢。 // As you may have found, if you use this code, the resize areas // will be inside the frameless window, however, a normal Win32 // window can be resized outside of it. Here is the reason: the // WS_THICKFRAME window style will cause a window has three // transparent areas beside the window's left, right and bottom // edge. Their width or height is eight pixels if the window is not // scaled. In most cases, they are totally invisible. It's DWM's // responsibility to draw and control them. They exist to let the // user resize the window, visually outside of it. They are in the // window area, but not the client area, so they are in the // non-client area actually. But we have turned the whole window // area into client area in WM_NCCALCSIZE, so the three transparent // resize areas also become a part of the client area and thus they // become visible. When we resize the window, it looks like we are // resizing inside of it, however, that's because the transparent // resize areas are visible now, we ARE resizing outside of the // window actually. But I don't know how to make them become // transparent again without breaking the frame shadow drawn by DWM. // If you really want to solve it, you can try to embed your window // into a larger transparent window and draw the frame shadow // yourself. As what we have said in WM_NCCALCSIZE, you can only // remove the top area of the window, this will let us be able to // resize outside of the window and don't need much process in this // message, it looks like a perfect plan, however, the top border is // missing due to the whole top area is removed, and it's very hard // to bring it back because we have to use a trick in WM_PAINT // (learned from Windows Terminal), but no matter what we do in // WM_PAINT, it will always break the backing store mechanism of Qt, // so actually we can't do it. And it's very difficult to do such // things in NativeEventFilters as well. What's worse, if we really // do this, the four window borders will become white and they look // horrible in dark mode. This solution only supports Windows 10 // because the border width on Win10 is only one pixel, however it's // eight pixels on Windows 7 so preserving the three window borders // looks terrible on old systems. I'm testing this solution in // another branch, if you are interested in it, you can give it a // try. if (data->windowData.mouseTransparent) { // Mouse events will be passed to the parent window. *result = HTTRANSPARENT; return true; } const auto getHTResult = [](const HWND _hWnd, const LPARAM _lParam, const WINDOWDATA &_data) -> LRESULT { const auto isInSpecificAreas = [](const int x, const int y, const QList &areas, const qreal dpr) -> bool { if (!areas.isEmpty()) { for (auto &&area : qAsConst(areas)) { if (!area.isValid()) { continue; } if (QRectF(area.x() * dpr, area.y() * dpr, area.width() * dpr, area.height() * dpr) .contains(x, y)) { return true; } } } return false; }; #if defined(QT_WIDGETS_LIB) || defined(QT_QUICK_LIB) const auto isInSpecificObjects = [](const int x, const int y, const QList> &objects, const qreal dpr) -> bool { if (!objects.isEmpty()) { for (auto &&object : qAsConst(objects)) { if (!object) { continue; } #ifdef QT_WIDGETS_LIB const auto widget = qobject_cast(object); if (widget) { const QPoint pos = widget->mapToGlobal({0, 0}); if (QRectF(pos.x() * dpr, pos.y() * dpr, widget->width() * dpr, widget->height() * dpr) .contains(x, y)) { return true; } } #endif #ifdef QT_QUICK_LIB const auto quickItem = qobject_cast(object); if (quickItem) { const QPointF pos = quickItem->mapToGlobal({0, 0}); if (QRectF(pos.x() * dpr, pos.y() * dpr, quickItem->width() * dpr, quickItem->height() * dpr) .contains(x, y)) { return true; } } #endif } } return false; }; #endif RECT clientRect = {0, 0, 0, 0}; WNEF_EXECUTE_WINAPI(GetClientRect, _hWnd, &clientRect) const LONG ww = clientRect.right; const LONG wh = clientRect.bottom; // Don't use HIWORD(lParam) and LOWORD(lParam) to get cursor // coordinates because their results are unsigned numbers, // however the cursor position may be negative due to in a // different monitor. const POINT globalMouse{GET_X_LPARAM(_lParam), GET_Y_LPARAM(_lParam)}; POINT mouse = globalMouse; WNEF_EXECUTE_WINAPI(ScreenToClient, _hWnd, &mouse) // These values should be DPI-aware. const LONG bw = getSystemMetric(_hWnd, SystemMetric::BorderWidth, true); const LONG bh = getSystemMetric(_hWnd, SystemMetric::BorderHeight, true); const LONG tbh = getSystemMetric(_hWnd, SystemMetric::TitleBarHeight, true); const qreal dpr = GetDevicePixelRatioForWindow(_hWnd); const bool isInIgnoreAreas = isInSpecificAreas(mouse.x, mouse.y, _data.ignoreAreas, dpr); const bool customDragAreas = !_data.draggableAreas.isEmpty(); const bool isInDraggableAreas = customDragAreas ? isInSpecificAreas(mouse.x, mouse.y, _data.draggableAreas, dpr) : true; #if defined(QT_WIDGETS_LIB) || defined(QT_QUICK_LIB) const bool isInIgnoreObjects = isInSpecificObjects(globalMouse.x, globalMouse.y, _data.ignoreObjects, dpr); const bool customDragObjects = !_data.draggableObjects.isEmpty(); const bool isInDraggableObjects = customDragObjects ? isInSpecificObjects(globalMouse.x, globalMouse.y, _data.draggableObjects, dpr) : true; #else // Don't block resizing if both of the Qt Widgets module and Qt // Quick module are not compiled in, although there's not much // significance of using this code in this case. const bool isInIgnoreObjects = false; const bool isInDraggableObjects = true; const bool customDragObjects = false; #endif const bool customDrag = customDragAreas || customDragObjects; const bool isResizePermitted = !isInIgnoreAreas && !isInIgnoreObjects; const bool isTitleBar = (customDrag ? (isInDraggableAreas && isInDraggableObjects) : (mouse.y <= (tbh + bh))) && isResizePermitted && !_data.disableTitleBar; if (IsMaximized(_hWnd)) { if (isTitleBar) { return HTCAPTION; } return HTCLIENT; } const bool isTop = (mouse.y <= bh) && isResizePermitted; const bool isBottom = (mouse.y >= (wh - bh)); // Make the border a little wider to let the user easy to resize // on corners. const int factor = (isTop || isBottom) ? 2 : 1; const bool isLeft = (mouse.x <= (bw * factor)); const bool isRight = (mouse.x >= (ww - (bw * factor))); const bool fixedSize = _data.fixedSize; const auto getBorderValue = [fixedSize](int value) -> int { // HTBORDER: non-resizeable window border. return fixedSize ? HTBORDER : value; }; if (isTop) { if (isLeft) { return getBorderValue(HTTOPLEFT); } if (isRight) { return getBorderValue(HTTOPRIGHT); } return getBorderValue(HTTOP); } if (isBottom) { if (isLeft) { return getBorderValue(HTBOTTOMLEFT); } if (isRight) { return getBorderValue(HTBOTTOMRIGHT); } return getBorderValue(HTBOTTOM); } if (isLeft) { return getBorderValue(HTLEFT); } if (isRight) { return getBorderValue(HTRIGHT); } if (isTitleBar) { return HTCAPTION; } return HTCLIENT; }; *result = getHTResult(msg->hwnd, msg->lParam, data->windowData); return true; } case WM_GETMINMAXINFO: { // We can set the maximum and minimum size of the window in this // message. const MONITORINFO monitorInfo = GetMonitorInfoForWindow(msg->hwnd); const RECT rcWorkArea = monitorInfo.rcWork; const RECT rcMonitorArea = monitorInfo.rcMonitor; const auto mmi = reinterpret_cast(msg->lParam); if (isWin8OrGreator()) { // Works fine on Windows 8/8.1/10 mmi->ptMaxPosition.x = qAbs(rcWorkArea.left - rcMonitorArea.left); mmi->ptMaxPosition.y = qAbs(rcWorkArea.top - rcMonitorArea.top); } else { // ### FIXME: Buggy on Windows 7: // The origin of coordinates is the top left edge of the // monitor's work area. Why? It should be the top left edge of // the monitor's area. mmi->ptMaxPosition.x = rcMonitorArea.left; mmi->ptMaxPosition.y = rcMonitorArea.top; } if (data->windowData.maximumSize.isEmpty()) { mmi->ptMaxSize.x = qAbs(rcWorkArea.right - rcWorkArea.left); mmi->ptMaxSize.y = qAbs(rcWorkArea.bottom - rcWorkArea.top); } else { mmi->ptMaxSize.x = qRound(GetDevicePixelRatioForWindow(msg->hwnd) * data->windowData.maximumSize.width()); mmi->ptMaxSize.y = qRound(GetDevicePixelRatioForWindow(msg->hwnd) * data->windowData.maximumSize.height()); } mmi->ptMaxTrackSize.x = mmi->ptMaxSize.x; mmi->ptMaxTrackSize.y = mmi->ptMaxSize.y; if (!data->windowData.minimumSize.isEmpty()) { mmi->ptMinTrackSize.x = qRound(GetDevicePixelRatioForWindow(msg->hwnd) * data->windowData.minimumSize.width()); mmi->ptMinTrackSize.y = qRound(GetDevicePixelRatioForWindow(msg->hwnd) * data->windowData.minimumSize.height()); } *result = 0; return true; } case WM_SETICON: case WM_SETTEXT: { // Disable painting while these messages are handled to prevent them // from drawing a window caption over the client area. const auto oldStyle = WNEF_EXECUTE_WINAPI_RETURN(GetWindowLongPtrW, 0, msg->hwnd, GWL_STYLE); // Prevent Windows from drawing the default title bar by temporarily // toggling the WS_VISIBLE style. WNEF_EXECUTE_WINAPI(SetWindowLongPtrW, msg->hwnd, GWL_STYLE, oldStyle & ~WS_VISIBLE) updateWindow(msg->hwnd, true, false); const LRESULT ret = WNEF_EXECUTE_WINAPI_RETURN(DefWindowProcW, 0, msg->hwnd, msg->message, msg->wParam, msg->lParam); WNEF_EXECUTE_WINAPI(SetWindowLongPtrW, msg->hwnd, GWL_STYLE, oldStyle) updateWindow(msg->hwnd, true, false); *result = ret; return true; } case WM_DWMCOMPOSITIONCHANGED: // DWM won't draw the frame shadow if the window doesn't have a // frame. So extend the window frame a bit to make sure we still // have the frame shadow. But don't worry, the extended window frame // won't be seen by the user because it's covered by the client area // as what we did in WM_NCCALCSIZE. UpdateFrameMarginsForWindow(msg->hwnd); break; case WM_DPICHANGED: // Sent when the effective dots per inch (dpi) for a window has // changed. You won't get this message until Windows 8.1 // wParam: The HIWORD of the wParam contains the Y-axis value of // the new dpi of the window. The LOWORD of the wParam contains // the X-axis value of the new DPI of the window. For example, // 96, 120, 144, or 192. The values of the X-axis and the Y-axis // are identical for Windows apps. // lParam: A pointer to a RECT structure that provides a suggested // size and position of the current window scaled for the new DPI. // The expectation is that apps will reposition and resize windows // based on the suggestions provided by lParam when handling this // message. // Return value: If an application processes this message, it // should return zero. // See MSDN for more accurate and detailed information: // https://docs.microsoft.com/en-us/windows/win32/hidpi/wm-dpichanged // Note: Qt will do the scaling automatically, there is no need // to do this yourself. See: // https://code.qt.io/cgit/qt/qtbase.git/tree/src/plugins/platforms/windows/qwindowscontext.cpp break; default: break; } } return false; } void WinNativeEventFilter::setWindowData(const HWND window, const WINDOWDATA *data) { ResolveWin32APIs(); if (window && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, window) && data) { createUserData(window, data); } } WinNativeEventFilter::WINDOWDATA *WinNativeEventFilter::windowData(const HWND window) { ResolveWin32APIs(); if (window && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, window)) { createUserData(window); return &(reinterpret_cast( WNEF_EXECUTE_WINAPI_RETURN(GetWindowLongPtrW, 0, window, GWLP_USERDATA)) ->windowData); } return nullptr; } void WinNativeEventFilter::setBorderWidth(const int bw) { m_borderWidth = bw; } void WinNativeEventFilter::setBorderHeight(const int bh) { m_borderHeight = bh; } void WinNativeEventFilter::setTitleBarHeight(const int tbh) { m_titleBarHeight = tbh; } void WinNativeEventFilter::updateWindow(const HWND handle, const bool triggerFrameChange, const bool redraw) { ResolveWin32APIs(); if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { if (triggerFrameChange) { WNEF_EXECUTE_WINAPI(SetWindowPos, handle, nullptr, 0, 0, 0, 0, SWP_FRAMECHANGED | SWP_NOACTIVATE | SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | SWP_NOOWNERZORDER) } if (redraw) { WNEF_EXECUTE_WINAPI(RedrawWindow, handle, nullptr, nullptr, RDW_INVALIDATE | RDW_UPDATENOW | RDW_NOCHILDREN) } } } int WinNativeEventFilter::getSystemMetric(const HWND handle, const SystemMetric metric, const bool dpiAware) { ResolveWin32APIs(); const qreal dpr = dpiAware ? GetDevicePixelRatioForWindow(handle) : m_defaultDevicePixelRatio; if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { createUserData(handle); const auto userData = reinterpret_cast( WNEF_EXECUTE_WINAPI_RETURN(GetWindowLongPtrW, 0, handle, GWLP_USERDATA)); switch (metric) { case SystemMetric::BorderWidth: { const int bw = userData->windowData.borderWidth; if (bw > 0) { return qRound(bw * dpr); } else { const int result_nondpi = WNEF_EXECUTE_WINAPI_RETURN(GetSystemMetrics, 0, SM_CXSIZEFRAME) + WNEF_EXECUTE_WINAPI_RETURN(GetSystemMetrics, 0, SM_CXPADDEDBORDER); const int result_dpi = GetSystemMetricsForWindow(handle, SM_CXSIZEFRAME) + GetSystemMetricsForWindow(handle, SM_CXPADDEDBORDER); const int result = dpiAware ? result_dpi : result_nondpi; return result > 0 ? result : qRound(m_defaultBorderWidth * dpr); } } case SystemMetric::BorderHeight: { const int bh = userData->windowData.borderHeight; if (bh > 0) { return qRound(bh * dpr); } else { const int result_nondpi = WNEF_EXECUTE_WINAPI_RETURN(GetSystemMetrics, 0, SM_CYSIZEFRAME) + WNEF_EXECUTE_WINAPI_RETURN(GetSystemMetrics, 0, SM_CXPADDEDBORDER); const int result_dpi = GetSystemMetricsForWindow(handle, SM_CYSIZEFRAME) + GetSystemMetricsForWindow(handle, SM_CXPADDEDBORDER); const int result = dpiAware ? result_dpi : result_nondpi; return result > 0 ? result : qRound(m_defaultBorderHeight * dpr); } } case SystemMetric::TitleBarHeight: { const int tbh = userData->windowData.titleBarHeight; if (tbh > 0) { return qRound(tbh * dpr); } else { const int result_nondpi = WNEF_EXECUTE_WINAPI_RETURN(GetSystemMetrics, 0, SM_CYCAPTION); const int result_dpi = GetSystemMetricsForWindow(handle, SM_CYCAPTION); const int result = dpiAware ? result_dpi : result_nondpi; return result > 0 ? result : qRound(m_defaultTitleBarHeight * dpr); } } } } switch (metric) { case SystemMetric::BorderWidth: if (m_borderWidth > 0) { return qRound(m_borderWidth * dpr); } else { return qRound(m_defaultBorderWidth * dpr); } case SystemMetric::BorderHeight: if (m_borderHeight > 0) { return qRound(m_borderHeight * dpr); } else { return qRound(m_defaultBorderHeight * dpr); } case SystemMetric::TitleBarHeight: if (m_titleBarHeight > 0) { return qRound(m_titleBarHeight * dpr); } else { return qRound(m_defaultTitleBarHeight * dpr); } } return -1; } void WinNativeEventFilter::setWindowGeometry( const HWND handle, const int x, const int y, const int width, const int height) { ResolveWin32APIs(); if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle) && (x > 0) && (y > 0) && (width > 0) && (height > 0)) { const qreal dpr = GetDevicePixelRatioForWindow(handle); // Why not use SetWindowPos? Actually we can, but MoveWindow // sends the WM_WINDOWPOSCHANGING, WM_WINDOWPOSCHANGED, WM_MOVE, // WM_SIZE, and WM_NCCALCSIZE messages to the window. // SetWindowPos only sends WM_WINDOWPOSCHANGED. WNEF_EXECUTE_WINAPI(MoveWindow, handle, x, y, qRound(width * dpr), qRound(height * dpr), TRUE) } } void WinNativeEventFilter::moveWindowToDesktopCenter(const HWND handle) { ResolveWin32APIs(); if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { const WINDOWINFO windowInfo = GetInfoForWindow(handle); const MONITORINFO monitorInfo = GetMonitorInfoForWindow(handle); // If we want to move a window to the center of the desktop, // I think we should use rcMonitor, the monitor's whole area, // to calculate the new coordinates of our window, not rcWork. const LONG mw = qAbs(monitorInfo.rcMonitor.right - monitorInfo.rcMonitor.left); const LONG mh = qAbs(monitorInfo.rcMonitor.bottom - monitorInfo.rcMonitor.top); const LONG ww = qAbs(windowInfo.rcWindow.right - windowInfo.rcWindow.left); const LONG wh = qAbs(windowInfo.rcWindow.bottom - windowInfo.rcWindow.top); WNEF_EXECUTE_WINAPI(MoveWindow, handle, qRound((mw - ww) / 2.0), qRound((mh - wh) / 2.0), ww, wh, TRUE) } } void WinNativeEventFilter::updateQtFrame(QWindow *window, const int titleBarHeight) { if (window && (titleBarHeight > 0)) { // Reduce top frame to zero since we paint it ourselves. Use // device pixel to avoid rounding errors. const QMargins margins = {0, -titleBarHeight, 0, 0}; const QVariant marginsVar = QVariant::fromValue(margins); // The dynamic property takes effect when creating the platform // window. window->setProperty("_q_windowsCustomMargins", marginsVar); // If a platform window exists, change via native interface. #if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0)) QPlatformWindow *platformWindow = window->handle(); if (platformWindow) { QGuiApplication::platformNativeInterface() ->setWindowProperty(platformWindow, QString::fromUtf8("WindowsCustomMargins"), marginsVar); } #else auto *platformWindow = dynamic_cast( window->handle()); if (platformWindow) { platformWindow->setCustomMargins(margins); } #endif } } void WinNativeEventFilter::updateQtFrame_internal(const HWND handle) { ResolveWin32APIs(); if (handle && WNEF_EXECUTE_WINAPI_RETURN(IsWindow, FALSE, handle)) { const int tbh = getSystemMetric(handle, SystemMetric::TitleBarHeight); #ifdef QT_WIDGETS_LIB const QWidget *widget = QWidget::find(reinterpret_cast(handle)); if (widget && widget->isTopLevel()) { QWindow *window = widget->windowHandle(); if (window) { updateQtFrame(window, tbh); return; } } #endif QWindow *window = findQWindowFromRawHandle(handle); if (window) { updateQtFrame(window, tbh); } } }