From c229915e9d4b2818155f3650869726fdcbe7e21d Mon Sep 17 00:00:00 2001
From: Sine Striker <trueful@163.com>
Date: ćšć, 21 12æ 2023 14:12:26 +0800
Subject: [PATCH] Prepare to add mica
---
src/core/contexts/win32windowcontext.cpp | 318 +++++++++++++++++++++++++++++++++++++++++-----------
1 files changed, 251 insertions(+), 67 deletions(-)
diff --git a/src/core/contexts/win32windowcontext.cpp b/src/core/contexts/win32windowcontext.cpp
index 11b5327..1b969cf 100644
--- a/src/core/contexts/win32windowcontext.cpp
+++ b/src/core/contexts/win32windowcontext.cpp
@@ -79,16 +79,6 @@
// Original Qt window proc function
static WNDPROC g_qtWindowProc = nullptr;
- // ### FIXME FIXME FIXME
- // ### FIXME: Tell the user to call in the documentation, instead of automatically
- // calling it directly.
- // ### FIXME FIXME FIXME
- static const struct QWK_Hook {
- QWK_Hook() {
- qApp->setAttribute(Qt::AA_DontCreateNativeWidgetSiblings);
- }
- } g_hook{};
-
struct DynamicApis {
static const DynamicApis &instance() {
static const DynamicApis inst{};
@@ -389,16 +379,7 @@
getSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi);
}
- static void updateInternalWindowFrameMargins(HWND hwnd, QWindow *window) {
- 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};
- }
- }();
+ static void setInternalWindowFrameMargins(QWindow *window, const QMargins &margins) {
const QVariant marginsVar = QVariant::fromValue(margins);
window->setProperty("_q_windowsCustomMargins", marginsVar);
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
@@ -424,16 +405,83 @@
monitorInfo.cbSize = sizeof(monitorInfo);
::GetMonitorInfoW(monitor, &monitorInfo);
return monitorInfo;
- };
+ }
- static inline void moveToDesktopCenter(HWND hwnd) {
- const auto monitorInfo = getMonitorForWindow(hwnd);
+ 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;
+ 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) {
+ RECT currentMonitorRect = getMonitorForWindow(hwnd).rcMonitor;
+ RECT activeMonitorRect = activeMonitor.rcMonitor;
+ // We are in the same monitor, nothing to adjust here.
+ if (currentMonitorRect == activeMonitorRect) {
+ return;
+ }
+ RECT currentWindowRect{};
+ ::GetWindowRect(hwnd, ¤tWindowRect);
+ auto newWindowX =
+ activeMonitorRect.left + (currentWindowRect.left - currentMonitorRect.left);
+ auto newWindowY = activeMonitorRect.top + (currentWindowRect.top - currentMonitorRect.top);
+ ::SetWindowPos(hwnd, nullptr, newWindowX, newWindowY, RECT_WIDTH(currentWindowRect),
+ RECT_HEIGHT(currentWindowRect),
+ SWP_NOACTIVATE | SWP_NOSIZE | SWP_NOZORDER | SWP_NOOWNERZORDER);
+ }
+
+ static inline void bringWindowToFront(HWND hwnd) {
+ HWND oldForegroundWindow = ::GetForegroundWindow();
+ if (!oldForegroundWindow) {
+ // The foreground window can be NULL, it's not an API error.
+ return;
+ }
+ MONITORINFOEXW activeMonitor = getMonitorForWindow(oldForegroundWindow);
+ // We need to show the window first, otherwise we won't be able to bring it to front.
+ if (!::IsWindowVisible(hwnd)) {
+ ::ShowWindow(hwnd, SW_SHOW);
+ }
+ if (IsMinimized(hwnd)) {
+ // Restore the window if it is minimized.
+ ::ShowWindow(hwnd, SW_RESTORE);
+ // Once we've been restored, throw us on the active monitor.
+ moveWindowToMonitor(hwnd, activeMonitor);
+ // When the window is restored, it will always become the foreground window.
+ // So return early here, we don't need the following code to bring it to front.
+ return;
+ }
+ // OK, our window is not minimized, so now we will try to bring it to front manually.
+ // First try to send a message to the current foreground window to check whether
+ // it is currently hanging or not.
+ if (!::SendMessageTimeoutW(oldForegroundWindow, WM_NULL, 0, 0,
+ SMTO_BLOCK | SMTO_ABORTIFHUNG | SMTO_NOTIMEOUTIFNOTHUNG, 1000,
+ nullptr)) {
+ // The foreground window hangs, can't activate current window.
+ return;
+ }
+ DWORD windowThreadProcessId = ::GetWindowThreadProcessId(oldForegroundWindow, nullptr);
+ DWORD currentThreadId = ::GetCurrentThreadId();
+ // We won't be able to change a window's Z order if it's not our own window,
+ // so we use this small technique to pretend the foreground window is ours.
+ ::AttachThreadInput(windowThreadProcessId, currentThreadId, TRUE);
+
+ [[maybe_unused]] const auto &cleaner =
+ qScopeGuard([windowThreadProcessId, currentThreadId]() {
+ ::AttachThreadInput(windowThreadProcessId, currentThreadId, FALSE); //
+ });
+
+ ::BringWindowToTop(hwnd);
+ // Activate the window too. This will force us to the virtual desktop this
+ // window is on, if it's on another virtual desktop.
+ ::SetActiveWindow(hwnd);
+ // Throw us on the active monitor.
+ moveWindowToMonitor(hwnd, activeMonitor);
}
static inline bool isFullScreen(HWND hwnd) {
@@ -772,18 +820,52 @@
return ::CallWindowProcW(g_qtWindowProc, hWnd, message, wParam, lParam);
}
+ 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);
+
+ // Store original window proc
+ if (!g_qtWindowProc) {
+ g_qtWindowProc = reinterpret_cast<WNDPROC>(::GetWindowLongPtrW(hWnd, GWLP_WNDPROC));
+ }
+
+ // Hook window proc
+ ::SetWindowLongPtrW(hWnd, GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(QWKHookedWndProc));
+
+ // Install global native event filter
+ WindowsNativeEventFilter::install();
+
+ // Save window handle mapping
+ g_wndProcHash->insert(hWnd, ctx);
+ }
+
+ static inline void removeManagedWindow(HWND hWnd) {
+ // Remove window handle mapping
+ if (!g_wndProcHash->remove(hWnd))
+ return;
+
+ // Remove event filter if the all windows has been destroyed
+ if (g_wndProcHash->empty()) {
+ WindowsNativeEventFilter::uninstall();
+ }
+ }
+
Win32WindowContext::Win32WindowContext() : AbstractWindowContext() {
}
Win32WindowContext::~Win32WindowContext() {
- // Remove window handle mapping
- if (auto hWnd = reinterpret_cast<HWND>(windowId); hWnd) {
- g_wndProcHash->remove(hWnd);
-
- // Remove event filter if the all windows has been destroyed
- if (g_wndProcHash->empty()) {
- WindowsNativeEventFilter::uninstall();
- }
+ if (windowId) {
+ removeManagedWindow(reinterpret_cast<HWND>(windowId));
}
}
@@ -794,21 +876,76 @@
void Win32WindowContext::virtual_hook(int id, void *data) {
switch (id) {
case CentralizeHook: {
- const auto hwnd = reinterpret_cast<HWND>(m_windowHandle->winId());
- moveToDesktopCenter(hwnd);
+ if (!windowId)
+ return;
+ const auto hwnd = reinterpret_cast<HWND>(windowId);
+ moveWindowToDesktopCenter(hwnd);
+ return;
+ }
+
+ case RaiseWindowHook: {
+ if (!windowId)
+ return;
+ const auto hwnd = reinterpret_cast<HWND>(windowId);
+ bringWindowToFront(hwnd);
return;
}
case ShowSystemMenuHook: {
+ if (!windowId)
+ return;
const auto &pos = *static_cast<const QPoint *>(data);
- auto hWnd = reinterpret_cast<HWND>(m_windowHandle->winId());
+ auto hWnd = reinterpret_cast<HWND>(windowId);
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
- const QPoint nativeGlobalPos = QHighDpi::toNativeGlobalPosition(pos, m_windowHandle);
+ 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));
+ return;
+ }
+
+ case WindowAttributeChangedHook: {
+ auto args = static_cast<void **>(data);
+ const auto &key = *static_cast<const QString *>(args[0]);
+ const auto &newVar = *static_cast<const QVariant *>(args[1]);
+ const auto &oldVar = *static_cast<const QVariant *>(args[2]);
+
+ if (key == QStringLiteral("no-frame-shadow")) {
+ if (!windowId)
+ return;
+ if (newVar.toBool()) {
+ // TODO: set off
+ } else {
+ // TODO: set on
+ }
+ } else if (key == QStringLiteral("mica-material")) {
+ if (!windowId || !isWin11OrGreater())
+ return;
+ const auto hwnd = reinterpret_cast<HWND>(windowId);
+ if (newVar.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};
+ ::DwmExtendFrameIntoClientArea(hwnd, &margins);
+
+ // Use official DWM API to enable Mica/Mica Alt, available since Windows 11
+ // (10.0.22000).
+ const DWM_SYSTEMBACKDROP_TYPE blurType =
+ DWMSBT_MAINWINDOW; // This one is Mica, if you want to enable Mica Alt,
+ // use DWMSBT_TABBEDWINDOW instead.
+ DynamicApis::instance().pDwmSetWindowAttribute(
+ hwnd, DWMWA_SYSTEMBACKDROP_TYPE, &blurType, sizeof(blurType));
+
+ */
+ } else {
+ // TODO: set off
+ }
+ }
return;
}
@@ -823,11 +960,14 @@
}
case DrawWindows10BorderHook: {
+ if (!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 ®ion = *static_cast<const QRegion *>(args[2]);
- const auto hwnd = reinterpret_cast<HWND>(m_windowHandle->winId());
+ const auto hwnd = reinterpret_cast<HWND>(windowId);
QPen pen;
pen.setWidth(getWindowFrameBorderThickness(hwnd) * 2);
@@ -862,10 +1002,8 @@
return;
}
- default: {
- // unreachable
+ default:
break;
- }
}
AbstractWindowContext::virtual_hook(id, data);
}
@@ -878,39 +1016,36 @@
return getWindowFrameBorderThickness(reinterpret_cast<HWND>(windowId));
}
- bool Win32WindowContext::setupHost() {
+ void Win32WindowContext::winIdChanged() {
+ // If the original window id is valid, remove all resources related
+ if (windowId) {
+ removeManagedWindow(reinterpret_cast<HWND>(windowId));
+ windowId = 0;
+ }
+
+ if (!m_windowHandle) {
+ return;
+ }
+
// Install window hook
auto winId = m_windowHandle->winId();
auto hWnd = reinterpret_cast<HWND>(winId);
#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 }) {
+ 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));
}
#endif
- // Inform Qt we want and have set custom margins
- updateInternalWindowFrameMargins(hWnd, m_windowHandle);
+ // Add managed window
+ addManagedWindow(m_windowHandle, hWnd, this);
- // Store original window proc
- if (!g_qtWindowProc) {
- g_qtWindowProc = reinterpret_cast<WNDPROC>(::GetWindowLongPtrW(hWnd, GWLP_WNDPROC));
- }
-
- // Hook window proc
- ::SetWindowLongPtrW(hWnd, GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(QWKHookedWndProc));
-
- // Install global native event filter
- WindowsNativeEventFilter::install();
-
- // Cache window ID
+ // Cache win id
windowId = winId;
-
- // Save window handle mapping
- g_wndProcHash->insert(hWnd, this);
-
- return true;
}
bool Win32WindowContext::windowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam,
@@ -1171,6 +1306,53 @@
const WindowPart currentWindowPart = lastHitTestResult;
if (message == WM_NCMOUSEMOVE) {
if (currentWindowPart != 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
+ // widget. At this time, no other widgets will accept the mouse event until
+ // QWidgetWindow receives the mouse release event, then set `qt_button_down`
+ // to null.
+
+ // Imagine the following situation, now the main window has a pop-up menu,
+ // the focus is not on the main window, if we click outside the pop-up menu,
+ // the menu will close, which seems to be completely fine. But if we close
+ // the menu by clicking on the title bar draggable area, then other widgets
+ // won't accept the mouse message afterwards.
+
+ // Here's the reason.
+ // When the mouse is placed in the draggable area of the title bar, there
+ // are two situations.
+
+ // 1. If the focus is on the main window, and the last result of
+ // WM_NCHITTEST is HTCAPTION, the mouse click event in the title bar is
+ // taken over by Windows and Qt does not receive the mouse click event.
+
+ // 2. If the main window has a pop-up menu, it is completely different. When
+ // the mouse is pressed on the title bar, Windows sends the WM_LBUTTONDOWN
+ // message to the window plane of the pop-up menu, the menu is closed, but
+ // Qt will continue to forward the event to the QWidget under the mouse, and
+ // the event will be processed by QWidgetWindow, causing the title bar
+ // widget to be implicitly grabbed. After the menu is closed, Windows
+ // immediately sends WM_NCHITTEST, because the mouse is in the title bar
+ // draggable area, the result is HTCAPTION, so when the mouse is released,
+ // Windows sends WM_NCLBUTTONUP, which is a non-client message, and it
+ // will be ignored by Qt. As a consequence, QWidgetWindow can't receive a
+ // mouse release message in the client area, so the grab remains, and other
+ // widgets cannot receive mouse events.
+
+ // Since we didn't watch the menu window, we cannot capture any mouse
+ // press events sent by Windows, so we cannot solve this problem by
+ // recording mouse events. Fortunately, we found that the main window will
+ // receive a WM_NCMOUSEMOVE message immediately after the menu is closed, so
+ // we just manually send a mouse release event when this message arrives and
+ // set qt_button_down to null. Don't worry, when receiving WM_NCMOUSEMOVE,
+ // there shouldn't be any control in the state of being grabbed.
+
+ // In the native window, although QWidgetWindow handles the forwarded mouse
+ // press event when the menu is closed, since the native title bar is not a
+ // QWidget, no widget will be grabbed, and `qt_button_down` remains empty,
+ // the above problems would not arise.
+
m_delegate->resetQtGrabbedControl(m_host);
if (mouseLeaveBlocked) {
emulateClientAreaMessage(hWnd, message, wParam, lParam,
@@ -1233,6 +1415,8 @@
// window from client area, which means we will get previous window part as
// HTCLIENT if the mouse leaves window from client area and enters window
// from non-client area, but it has no bad effect.
+
+ // Why do we need to call this function here?
m_delegate->resetQtGrabbedControl(m_host);
}
}
@@ -1255,7 +1439,7 @@
// function.
if (wParam && !lParam) {
centered = true;
- moveToDesktopCenter(hWnd);
+ moveWindowToDesktopCenter(hWnd);
}
}
break;
@@ -1342,7 +1526,6 @@
// Terminal does, however, later I found that if we choose a proper
// 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)); //
});
@@ -1465,7 +1648,7 @@
*result = (isTitleBar ? HTCAPTION : HTCLIENT);
return true;
}
- // At this point, we know that the cursor is inside the client area
+ // At this point, we know that the cursor is inside the client area,
// so it has to be either the little border at the top of our custom
// title bar or the drag bar. Apparently, it must be the drag bar or
// the little border at the top which the user can use to move or
@@ -1558,9 +1741,10 @@
// the client area as a whole will shift to the left, which looks very abnormal if
// we don't repaint it. This exception disappears if we add SWP_NOCOPYBITS flag.
// But I don't know what caused the problem, or why this would solve it.
+ static constexpr const auto kBadWindowPosFlag =
+ SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE | SWP_FRAMECHANGED;
const auto windowPos = reinterpret_cast<LPWINDOWPOS>(lParam);
- if (windowPos->flags ==
- (SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE | SWP_FRAMECHANGED)) {
+ if (windowPos->flags == kBadWindowPosFlag) {
windowPos->flags |= SWP_NOCOPYBITS;
}
break;
--
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