// Copyright (C) 2023-2024 Stdware Collections (https://www.github.com/stdware)
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// Copyright (C) 2021-2023 wangwenx190 (Yuhang Zhao)
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// SPDX-License-Identifier: Apache-2.0
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#include "win32windowcontext_p.h"
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#include <optional>
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#include <QtCore/QAbstractEventDispatcher>
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#include <QtCore/QDateTime>
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#include <QtCore/QHash>
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#include <QtCore/QScopeGuard>
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#include <QtCore/QTimer>
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#include <QtGui/QGuiApplication>
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#include <QtGui/QPainter>
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#include <QtGui/QPalette>
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#include <QtGui/qpa/qwindowsysteminterface.h>
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#include <QtGui/private/qhighdpiscaling_p.h>
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#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
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# include <QtGui/private/qguiapplication_p.h>
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#endif
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#include <QtGui/qpa/qplatformwindow.h>
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#if QT_VERSION < QT_VERSION_CHECK(6, 2, 0)
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# include <QtGui/qpa/qplatformnativeinterface.h>
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#else
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# include <QtGui/qpa/qplatformwindow_p.h>
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#endif
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#include <QWKCore/qwkconfig.h>
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#include "qwkglobal_p.h"
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#include "qwkwindowsextra_p.h"
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#if (QT_VERSION >= QT_VERSION_CHECK(6, 6, 0)) && (QT_VERSION <= QT_VERSION_CHECK(6, 6, 1))
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# error Current Qt version has a critical bug which will break QWK functionality. Please upgrade to > 6.6.1 or downgrade to < 6.6.0
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#endif
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#ifndef DWM_BB_ENABLE
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# define DWM_BB_ENABLE 0x00000001
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#endif
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#ifndef ABM_GETAUTOHIDEBAREX
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# define ABM_GETAUTOHIDEBAREX 0x0000000b
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#endif
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namespace QWK {
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enum IconButtonClickLevelFlag {
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IconButtonClicked = 1,
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IconButtonDoubleClicked = 2,
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IconButtonTriggersClose = 4,
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};
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// The thickness of an auto-hide taskbar in pixels.
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static constexpr const quint8 kAutoHideTaskBarThickness = 2;
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QWK_USED static constexpr const struct {
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const uint32_t activeLight = MAKE_RGBA_COLOR(110, 110, 110, 255); // #6E6E6E
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const uint32_t activeDark = MAKE_RGBA_COLOR(51, 51, 51, 255); // #333333
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const uint32_t inactiveLight = MAKE_RGBA_COLOR(167, 167, 167, 255); // #A7A7A7
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const uint32_t inactiveDark = MAKE_RGBA_COLOR(61, 61, 62, 255); // #3D3D3E
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} kWindowsColorSet;
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// hWnd -> context
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using WndProcHash = QHash<HWND, Win32WindowContext *>;
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Q_GLOBAL_STATIC(WndProcHash, g_wndProcHash)
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// Original Qt window proc function
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static WNDPROC g_qtWindowProc = nullptr;
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static inline bool
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#if !QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDERS)
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constexpr
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#endif
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isSystemBorderEnabled() {
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return
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#if QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDERS)
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isWin10OrGreater()
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#else
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false
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#endif
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;
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}
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static inline void triggerFrameChange(HWND hwnd) {
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::SetWindowPos(hwnd, nullptr, 0, 0, 0, 0,
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SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_NOOWNERZORDER |
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SWP_FRAMECHANGED);
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}
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static void setInternalWindowFrameMargins(QWindow *window, const QMargins &margins) {
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const QVariant marginsVar = QVariant::fromValue(margins);
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// We need to tell Qt we have set a custom margin, because we are hiding
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// the title bar by pretending the whole window is filled by client area,
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// this however confuses Qt's internal logic. We need to do the following
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// hack to let Qt consider the extra margin when changing window geometry.
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window->setProperty("_q_windowsCustomMargins", marginsVar);
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#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
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if (QPlatformWindow *platformWindow = window->handle()) {
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if (const auto ni = QGuiApplication::platformNativeInterface()) {
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ni->setWindowProperty(platformWindow, QStringLiteral("WindowsCustomMargins"),
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marginsVar);
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}
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}
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#else
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if (const auto platformWindow =
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dynamic_cast<QNativeInterface::Private::QWindowsWindow *>(window->handle())) {
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// platformWindow->setCustomMargins(margins);
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}
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#endif
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}
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static inline MONITORINFOEXW getMonitorForWindow(HWND hwnd) {
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// Use "MONITOR_DEFAULTTONEAREST" here so that we can still get the correct
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// monitor even if the window is minimized.
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HMONITOR monitor = ::MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
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MONITORINFOEXW monitorInfo{};
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monitorInfo.cbSize = sizeof(monitorInfo);
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::GetMonitorInfoW(monitor, &monitorInfo);
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return monitorInfo;
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}
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static inline void moveWindowToMonitor(HWND hwnd, const MONITORINFOEXW &activeMonitor) {
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RECT currentMonitorRect = getMonitorForWindow(hwnd).rcMonitor;
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RECT activeMonitorRect = activeMonitor.rcMonitor;
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// We are in the same monitor, nothing to adjust here.
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if (currentMonitorRect == activeMonitorRect) {
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return;
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}
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RECT currentWindowRect{};
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::GetWindowRect(hwnd, ¤tWindowRect);
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auto newWindowX =
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activeMonitorRect.left + (currentWindowRect.left - currentMonitorRect.left);
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auto newWindowY = activeMonitorRect.top + (currentWindowRect.top - currentMonitorRect.top);
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::SetWindowPos(hwnd, nullptr, newWindowX, newWindowY, RECT_WIDTH(currentWindowRect),
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RECT_HEIGHT(currentWindowRect),
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SWP_NOACTIVATE | SWP_NOSIZE | SWP_NOZORDER | SWP_NOOWNERZORDER);
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}
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static inline bool isFullScreen(HWND hwnd) {
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RECT windowRect{};
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::GetWindowRect(hwnd, &windowRect);
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// Compare to the full area of the screen, not the work area.
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return (windowRect == getMonitorForWindow(hwnd).rcMonitor);
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}
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static inline bool isMaximized(HWND hwnd) {
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return ::IsZoomed(hwnd);
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}
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static inline bool isMinimized(HWND hwnd) {
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return ::IsIconic(hwnd);
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}
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static inline bool isWindowNoState(HWND hwnd) {
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#if 0
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WINDOWPLACEMENT wp{};
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wp.length = sizeof(wp);
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::GetWindowPlacement(hwnd, &wp);
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return ((wp.showCmd == SW_NORMAL) || (wp.showCmd == SW_RESTORE));
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#else
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if (isFullScreen(hwnd)) {
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return false;
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}
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const auto style = static_cast<DWORD>(::GetWindowLongPtrW(hwnd, GWL_STYLE));
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return (!(style & (WS_MINIMIZE | WS_MAXIMIZE)));
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#endif
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}
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static inline void bringWindowToFront(HWND hwnd) {
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HWND oldForegroundWindow = ::GetForegroundWindow();
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if (!oldForegroundWindow) {
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// The foreground window can be NULL, it's not an API error.
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return;
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}
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MONITORINFOEXW activeMonitor = getMonitorForWindow(oldForegroundWindow);
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// We need to show the window first, otherwise we won't be able to bring it to front.
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if (!::IsWindowVisible(hwnd)) {
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::ShowWindow(hwnd, SW_SHOW);
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}
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if (isMinimized(hwnd)) {
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// Restore the window if it is minimized.
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::ShowWindow(hwnd, SW_RESTORE);
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// Once we've been restored, throw us on the active monitor.
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moveWindowToMonitor(hwnd, activeMonitor);
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// When the window is restored, it will always become the foreground window.
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// So return early here, we don't need the following code to bring it to front.
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return;
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}
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// OK, our window is not minimized, so now we will try to bring it to front manually.
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// First try to send a message to the current foreground window to check whether
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// it is currently hanging or not.
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if (!::SendMessageTimeoutW(oldForegroundWindow, WM_NULL, 0, 0,
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SMTO_BLOCK | SMTO_ABORTIFHUNG | SMTO_NOTIMEOUTIFNOTHUNG, 1000,
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nullptr)) {
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// The foreground window hangs, can't activate current window.
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return;
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}
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DWORD windowThreadProcessId = ::GetWindowThreadProcessId(oldForegroundWindow, nullptr);
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DWORD currentThreadId = ::GetCurrentThreadId();
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// We won't be able to change a window's Z order if it's not our own window,
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// so we use this small technique to pretend the foreground window is ours.
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::AttachThreadInput(windowThreadProcessId, currentThreadId, TRUE);
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[[maybe_unused]] const auto &cleaner =
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qScopeGuard([windowThreadProcessId, currentThreadId]() {
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::AttachThreadInput(windowThreadProcessId, currentThreadId, FALSE);
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});
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::BringWindowToTop(hwnd);
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// Activate the window too. This will force us to the virtual desktop this
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// window is on, if it's on another virtual desktop.
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::SetActiveWindow(hwnd);
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// Throw us on the active monitor.
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moveWindowToMonitor(hwnd, activeMonitor);
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}
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// Returns false if the menu is canceled
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static bool showSystemMenu_sys(HWND hWnd, const POINT &pos, const bool selectFirstEntry,
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const bool fixedSize) {
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HMENU hMenu = ::GetSystemMenu(hWnd, FALSE);
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if (!hMenu) {
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// The corresponding window doesn't have a system menu, most likely due to the
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// lack of the "WS_SYSMENU" window style. This situation should not be treated
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// as an error so just ignore it and return early.
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return true;
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}
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const auto windowStyles = ::GetWindowLongPtrW(hWnd, GWL_STYLE);
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const bool allowMaximize = windowStyles & WS_MAXIMIZEBOX;
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const bool allowMinimize = windowStyles & WS_MINIMIZEBOX;
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const bool maxOrFull = isMaximized(hWnd) || isFullScreen(hWnd);
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::EnableMenuItem(hMenu, SC_CLOSE, (MF_BYCOMMAND | MFS_ENABLED));
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::EnableMenuItem(
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hMenu, SC_MAXIMIZE,
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(MF_BYCOMMAND |
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((maxOrFull || fixedSize || !allowMaximize) ? MFS_DISABLED : MFS_ENABLED)));
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::EnableMenuItem(
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hMenu, SC_RESTORE,
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(MF_BYCOMMAND |
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((maxOrFull && !fixedSize && allowMaximize) ? MFS_ENABLED : MFS_DISABLED)));
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// The first menu item should be selected by default if the menu is brought
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// up by keyboard. I don't know how to pre-select a menu item but it seems
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// highlight can do the job. However, there's an annoying issue if we do
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// this manually: the highlighted menu item is really only highlighted,
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// not selected, so even if the mouse cursor hovers on other menu items
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// or the user navigates to other menu items through keyboard, the original
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// highlight bar will not move accordingly, the OS will generate another
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// highlight bar to indicate the current selected menu item, which will make
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// the menu look kind of weird. Currently I don't know how to fix this issue.
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::HiliteMenuItem(hWnd, hMenu, SC_RESTORE,
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(MF_BYCOMMAND | (selectFirstEntry ? MFS_HILITE : MFS_UNHILITE)));
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::EnableMenuItem(hMenu, SC_MINIMIZE,
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(MF_BYCOMMAND | (allowMinimize ? MFS_ENABLED : MFS_DISABLED)));
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::EnableMenuItem(hMenu, SC_SIZE,
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(MF_BYCOMMAND | ((maxOrFull || fixedSize) ? MFS_DISABLED : MFS_ENABLED)));
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::EnableMenuItem(hMenu, SC_MOVE, (MF_BYCOMMAND | (maxOrFull ? MFS_DISABLED : MFS_ENABLED)));
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// The default menu item will appear in bold font. There can only be one default
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// menu item per menu at most. Set the item ID to "UINT_MAX" (or simply "-1")
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// can clear the default item for the given menu.
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UINT defaultItemId = UINT_MAX;
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if (isWin11OrGreater()) {
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if (maxOrFull) {
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defaultItemId = SC_RESTORE;
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} else {
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defaultItemId = SC_MAXIMIZE;
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}
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}
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if (defaultItemId == UINT_MAX) {
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defaultItemId = SC_CLOSE;
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}
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::SetMenuDefaultItem(hMenu, defaultItemId, FALSE);
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// Popup the system menu at the required position.
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const auto result = ::TrackPopupMenu(
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hMenu,
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(TPM_RETURNCMD | (QGuiApplication::isRightToLeft() ? TPM_RIGHTALIGN : TPM_LEFTALIGN) |
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TPM_RIGHTBUTTON),
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pos.x, pos.y, 0, hWnd, nullptr);
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// Unhighlight the first menu item after the popup menu is closed, otherwise it will keep
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// highlighting until we unhighlight it manually.
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::HiliteMenuItem(hWnd, hMenu, SC_RESTORE, (MF_BYCOMMAND | MFS_UNHILITE));
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if (!result) {
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// The user canceled the menu, no need to continue.
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return false;
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}
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// Send the command that the user chooses to the corresponding window.
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::PostMessageW(hWnd, WM_SYSCOMMAND, result, 0);
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return true;
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}
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static inline Win32WindowContext::WindowPart getHitWindowPart(int hitTestResult) {
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switch (hitTestResult) {
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case HTCLIENT:
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return Win32WindowContext::ClientArea;
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case HTCAPTION:
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return Win32WindowContext::TitleBar;
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case HTSYSMENU:
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case HTHELP:
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case HTREDUCE:
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case HTZOOM:
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case HTCLOSE:
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return Win32WindowContext::ChromeButton;
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case HTLEFT:
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case HTRIGHT:
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case HTTOP:
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case HTTOPLEFT:
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case HTTOPRIGHT:
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case HTBOTTOM:
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case HTBOTTOMLEFT:
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case HTBOTTOMRIGHT:
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return Win32WindowContext::ResizeBorder;
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case HTBORDER:
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return Win32WindowContext::FixedBorder;
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default:
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break;
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}
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return Win32WindowContext::Outside;
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}
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static bool isValidWindow(HWND hWnd, bool checkVisible, bool checkTopLevel) {
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if (!::IsWindow(hWnd)) {
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return false;
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}
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const LONG_PTR styles = ::GetWindowLongPtrW(hWnd, GWL_STYLE);
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if (styles & WS_DISABLED) {
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return false;
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}
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const LONG_PTR exStyles = ::GetWindowLongPtrW(hWnd, GWL_EXSTYLE);
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if (exStyles & WS_EX_TOOLWINDOW) {
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return false;
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}
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RECT rect{};
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if (!::GetWindowRect(hWnd, &rect)) {
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return false;
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}
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if ((rect.left >= rect.right) || (rect.top >= rect.bottom)) {
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return false;
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}
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if (checkVisible) {
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if (!::IsWindowVisible(hWnd)) {
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return false;
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}
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}
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if (checkTopLevel) {
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if (::GetAncestor(hWnd, GA_ROOT) != hWnd) {
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return false;
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}
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}
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return true;
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}
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static inline constexpr bool isNonClientMessage(const UINT message) {
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if (((message >= WM_NCCREATE) && (message <= WM_NCACTIVATE)) ||
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((message >= WM_NCMOUSEMOVE) && (message <= WM_NCMBUTTONDBLCLK)) ||
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((message >= WM_NCXBUTTONDOWN) && (message <= WM_NCXBUTTONDBLCLK))
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#if (WINVER >= _WIN32_WINNT_WIN8)
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|| ((message >= WM_NCPOINTERUPDATE) && (message <= WM_NCPOINTERUP))
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#endif
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|| ((message == WM_NCMOUSEHOVER) || (message == WM_NCMOUSELEAVE))) {
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return true;
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} else {
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return false;
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}
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}
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static MSG createMessageBlock(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
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MSG msg;
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msg.hwnd = hWnd;
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msg.message = message;
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msg.wParam = wParam;
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msg.lParam = lParam;
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const DWORD dwScreenPos = ::GetMessagePos();
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msg.pt.x = GET_X_LPARAM(dwScreenPos);
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msg.pt.y = GET_Y_LPARAM(dwScreenPos);
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if (!isNonClientMessage(message)) {
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::ScreenToClient(hWnd, &msg.pt);
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}
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msg.time = ::GetMessageTime();
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return msg;
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}
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static inline constexpr bool isInputMessage(UINT m) {
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switch (m) {
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case WM_IME_STARTCOMPOSITION:
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case WM_IME_ENDCOMPOSITION:
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case WM_IME_COMPOSITION:
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case WM_INPUT:
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case WM_TOUCH:
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case WM_MOUSEHOVER:
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case WM_MOUSELEAVE:
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case WM_NCMOUSEHOVER:
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case WM_NCMOUSELEAVE:
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case WM_SIZING:
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case WM_MOVING:
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case WM_SYSCOMMAND:
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case WM_COMMAND:
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case WM_DWMNCRENDERINGCHANGED:
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case WM_PAINT:
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return true;
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default:
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break;
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}
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return (m >= WM_MOUSEFIRST && m <= WM_MOUSELAST) ||
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(m >= WM_NCMOUSEMOVE && m <= WM_NCXBUTTONDBLCLK) ||
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(m >= WM_KEYFIRST && m <= WM_KEYLAST);
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}
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static inline QByteArray nativeEventType() {
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return QByteArrayLiteral("windows_generic_MSG");
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}
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// Send to QAbstractEventDispatcher
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static bool filterNativeEvent(MSG *msg, LRESULT *result) {
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auto dispatcher = QAbstractEventDispatcher::instance();
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QT_NATIVE_EVENT_RESULT_TYPE filterResult = *result;
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if (dispatcher && dispatcher->filterNativeEvent(nativeEventType(), msg, &filterResult)) {
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*result = LRESULT(filterResult);
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return true;
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}
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return false;
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}
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// Send to QWindowSystemInterface
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static bool filterNativeEvent(QWindow *window, MSG *msg, LRESULT *result) {
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QT_NATIVE_EVENT_RESULT_TYPE filterResult = *result;
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if (QWindowSystemInterface::handleNativeEvent(window, nativeEventType(), msg,
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&filterResult)) {
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*result = LRESULT(filterResult);
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return true;
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}
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return false;
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}
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static inline bool forwardFilteredEvent(QWindow *window, HWND hWnd, UINT message, WPARAM wParam,
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LPARAM lParam, LRESULT *result) {
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MSG msg = createMessageBlock(hWnd, message, wParam, lParam);
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// https://github.com/qt/qtbase/blob/e26a87f1ecc40bc8c6aa5b889fce67410a57a702/src/plugins/platforms/windows/qwindowscontext.cpp#L1025
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// Do exact the same as what Qt Windows plugin does.
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// Run the native event filters. QTBUG-67095: Exclude input messages which are sent
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// by QEventDispatcherWin32::processEvents()
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if (!isInputMessage(msg.message) && filterNativeEvent(&msg, result))
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return true;
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auto platformWindow = window->handle();
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if (platformWindow && filterNativeEvent(platformWindow->window(), &msg, result))
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return true;
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return false;
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}
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// https://github.com/qt/qtbase/blob/e26a87f1ecc40bc8c6aa5b889fce67410a57a702/src/plugins/platforms/windows/qwindowscontext.cpp#L1556
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// In QWindowsContext::windowsProc(), the messages will be passed to all global native event
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// filters, but because we have already filtered the messages in the hook WndProc function for
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// convenience, Qt does not know we may have already processed the messages and thus will call
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// DefWindowProc(). Consequently, we have to add a global native filter that forwards the result
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// of the hook function, telling Qt whether we have filtered the events before. Since Qt only
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// handles Windows window messages in the main thread, it is safe to do so.
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class WindowsNativeEventFilter : public AppNativeEventFilter {
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public:
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bool nativeEventFilter(const QByteArray &eventType, void *message,
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QT_NATIVE_EVENT_RESULT_TYPE *result) override {
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Q_UNUSED(eventType)
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// It has been observed that the pointer that Qt gives us is sometimes null on some
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// machines. We need to guard against it in such scenarios.
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if (!result) {
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return false;
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}
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auto msg = static_cast<const MSG *>(message);
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switch (msg->message) {
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case WM_NCCALCSIZE: {
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// https://github.com/qt/qtbase/blob/e26a87f1ecc40bc8c6aa5b889fce67410a57a702/src/plugins/platforms/windows/qwindowscontext.cpp#L1546
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// Qt needs to refer to the WM_NCCALCSIZE message data that hasn't been
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// processed, so we have to process it after Qt acquires the initial data.
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if (lastMessageContext) {
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LRESULT res;
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if (lastMessageContext->nonClientCalcSizeHandler(
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msg->hwnd, msg->message, msg->wParam, msg->lParam, &res)) {
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*result = decltype(*result)(res);
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return true;
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}
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}
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break;
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}
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// case WM_NCHITTEST: {
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// // The child window must return HTTRANSPARENT when processing
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// WM_NCHITTEST for
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// // the parent window to receive WM_NCHITTEST.
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// if (!lastMessageContext) {
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// auto rootHWnd = ::GetAncestor(msg->hwnd, GA_ROOT);
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// if (rootHWnd != msg->hwnd) {
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// if (auto ctx = g_wndProcHash->value(rootHWnd)) {
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// *result = HTTRANSPARENT;
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// return true;
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// }
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// }
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// }
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// break;
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// }
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}
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return false;
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}
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static inline WindowsNativeEventFilter *instance = nullptr;
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static inline Win32WindowContext *lastMessageContext = nullptr;
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static inline void install() {
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if (instance) {
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return;
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}
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instance = new WindowsNativeEventFilter();
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}
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static inline void uninstall() {
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if (!instance) {
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return;
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}
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delete instance;
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instance = nullptr;
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}
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};
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// https://github.com/qt/qtbase/blob/e26a87f1ecc40bc8c6aa5b889fce67410a57a702/src/plugins/platforms/windows/qwindowscontext.cpp#L1025
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// We can see from the source code that Qt will filter out some messages first and then send the
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// unfiltered messages to the event dispatcher. To activate the Snap Layout feature on Windows
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// 11, we must process some non-client area messages ourselves, but unfortunately these messages
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// have been filtered out already in that line, and thus we'll never have the chance to process
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// them ourselves. This is Qt's low level platform specific code, so we don't have any official
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// ways to change this behavior. But luckily we can replace the window procedure function of
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// Qt's windows, and in this hooked window procedure function, we finally have the chance to
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// process window messages before Qt touches them. So we reconstruct the MSG structure and send
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// it to our own custom native event filter to do all the magic works. But since the system menu
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// feature doesn't necessarily belong to the native implementation, we seperate the handling
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// code and always process the system menu part in this function for both implementations.
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//
|
// Original event flow:
|
// [Entry] Windows Message Queue
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// |
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// [Qt Window Proc] qwindowscontext.cpp#L1547: qWindowsWndProc()
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// ```
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// const bool handled = QWindowsContext::instance()->windowsProc
|
// (hwnd, message, et, wParam, lParam, &result,
|
// &platformWindow);
|
// ```
|
// |
|
// [Non-Input Filter] qwindowscontext.cpp#L1025: QWindowsContext::windowsProc()
|
// ```
|
// if (!isInputMessage(msg.message) &&
|
// filterNativeEvent(&msg, result))
|
// return true;
|
// ```
|
// |
|
// [User Filter] qwindowscontext.cpp#L1588: QWindowsContext::windowsProc()
|
// ```
|
// QAbstractEventDispatcher *dispatcher =
|
// QAbstractEventDispatcher::instance();
|
// qintptr filterResult = 0;
|
// if (dispatcher &&
|
// dispatcher->filterNativeEvent(nativeEventType(), msg,
|
// &filterResult)) {
|
// *result = LRESULT(filterResult);
|
// return true;
|
// }
|
// ```
|
// |
|
// [Extra work] The rest of QWindowsContext::windowsProc() and qWindowsWndProc()
|
//
|
// Notice: Only non-input messages will be processed by the user-defined global native event
|
// filter!!! These events are then passed to the widget class's own overridden
|
// QWidget::nativeEvent() as a local filter, where all native events can be handled, but we must
|
// create a new class derived from QWidget which we don't intend to. Therefore, we don't expect
|
// to process events from the global native event filter, but instead hook Qt's window
|
// procedure.
|
|
extern "C" LRESULT QT_WIN_CALLBACK QWKHookedWndProc(HWND hWnd, UINT message, WPARAM wParam,
|
LPARAM lParam) {
|
Q_ASSERT(hWnd);
|
if (!hWnd) {
|
return FALSE;
|
}
|
|
// Search window context
|
auto ctx = g_wndProcHash->value(hWnd);
|
if (!ctx) {
|
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) {
|
return ::CallWindowProcW(g_qtWindowProc, hWnd, message, wParam, lParam);
|
}
|
|
// Try hooked procedure and save result
|
LRESULT result;
|
if (ctx->windowProc(hWnd, message, wParam, lParam, &result)) {
|
// https://github.com/stdware/qwindowkit/issues/45
|
// 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;
|
}
|
|
// Continue dispatching.
|
return ::CallWindowProcW(g_qtWindowProc, hWnd, message, wParam, lParam);
|
}
|
|
static inline void addManagedWindow(QWindow *window, HWND hWnd, Win32WindowContext *ctx) {
|
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) {
|
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);
|
|
// Force a WM_NCCALCSIZE message manually to avoid the title bar become visible
|
// while Qt is re-creating the window (such as setWindowFlag(s) calls). It has
|
// been observed by our users.
|
triggerFrameChange(hWnd);
|
}
|
|
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() {
|
if (m_windowId) {
|
removeManagedWindow(reinterpret_cast<HWND>(m_windowId));
|
}
|
}
|
|
QString Win32WindowContext::key() const {
|
return QStringLiteral("win32");
|
}
|
|
void Win32WindowContext::virtual_hook(int id, void *data) {
|
switch (id) {
|
case RaiseWindowHook: {
|
if (!m_windowId)
|
return;
|
m_delegate->setWindowVisible(m_host, true);
|
const auto hwnd = reinterpret_cast<HWND>(m_windowId);
|
bringWindowToFront(hwnd);
|
return;
|
}
|
|
case ShowSystemMenuHook: {
|
if (!m_windowId)
|
return;
|
const auto &pos = *static_cast<const QPoint *>(data);
|
auto hWnd = reinterpret_cast<HWND>(m_windowId);
|
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
|
const QPoint nativeGlobalPos =
|
QHighDpi::toNativeGlobalPosition(pos, m_windowHandle.data());
|
#else
|
const QPoint nativeGlobalPos = QHighDpi::toNativePixels(pos, m_windowHandle.data());
|
#endif
|
std::ignore = showSystemMenu_sys(hWnd, qpoint2point(nativeGlobalPos), false,
|
isHostSizeFixed());
|
return;
|
}
|
|
case DefaultColorsHook: {
|
auto &map = *static_cast<QMap<QString, QColor> *>(data);
|
map.clear();
|
map.insert(QStringLiteral("activeLight"), kWindowsColorSet.activeLight);
|
map.insert(QStringLiteral("activeDark"), kWindowsColorSet.activeDark);
|
map.insert(QStringLiteral("inactiveLight"), kWindowsColorSet.inactiveLight);
|
map.insert(QStringLiteral("inactiveDark"), kWindowsColorSet.inactiveDark);
|
return;
|
}
|
|
#if QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDERS)
|
case DrawWindows10BorderHook_Emulated: {
|
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 ®ion = *static_cast<const QRegion *>(args[2]);
|
const auto hwnd = reinterpret_cast<HWND>(m_windowId);
|
|
QPen pen;
|
pen.setWidth(int(getWindowFrameBorderThickness(hwnd)) * 2);
|
|
const bool dark = isDarkThemeActive() && isDarkWindowFrameEnabled(hwnd);
|
if (m_delegate->isWindowActive(m_host)) {
|
if (isWindowFrameBorderColorized()) {
|
pen.setColor(getAccentColor());
|
} else {
|
static QColor frameBorderActiveColorLight(kWindowsColorSet.activeLight);
|
static QColor frameBorderActiveColorDark(kWindowsColorSet.activeDark);
|
pen.setColor(dark ? frameBorderActiveColorDark
|
: frameBorderActiveColorLight);
|
}
|
} else {
|
static QColor frameBorderInactiveColorLight(kWindowsColorSet.inactiveLight);
|
static QColor frameBorderInactiveColorDark(kWindowsColorSet.inactiveDark);
|
pen.setColor(dark ? frameBorderInactiveColorDark
|
: frameBorderInactiveColorLight);
|
}
|
painter.save();
|
|
// We need antialiasing to give us better result.
|
painter.setRenderHint(QPainter::Antialiasing);
|
|
painter.setPen(pen);
|
painter.drawLine(QLine{
|
QPoint{0, 0},
|
QPoint{m_windowHandle->width(), 0}
|
});
|
painter.restore();
|
return;
|
}
|
|
case DrawWindows10BorderHook_Native: {
|
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);
|
}
|
|
QVariant Win32WindowContext::windowAttribute(const QString &key) const {
|
if (key == QStringLiteral("window-rect")) {
|
if (!m_windowId)
|
return {};
|
|
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 (key == QStringLiteral("win10-border-needed")) {
|
return isSystemBorderEnabled() && !isWin11OrGreater();
|
}
|
|
if (key == QStringLiteral("windows-system-border-enabled")) {
|
return isSystemBorderEnabled();
|
}
|
|
if (key == QStringLiteral("border-thickness")) {
|
return m_windowId
|
? int(getWindowFrameBorderThickness(reinterpret_cast<HWND>(m_windowId)))
|
: 0;
|
}
|
|
if (key == QStringLiteral("title-bar-height")) {
|
return m_windowId ? int(getTitleBarHeight(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 the original window id is valid, remove all resources related
|
if (oldWinId) {
|
removeManagedWindow(reinterpret_cast<HWND>(oldWinId));
|
}
|
if (!winId) {
|
return;
|
}
|
|
// Install window hook
|
auto hWnd = reinterpret_cast<HWND>(winId);
|
if (!isSystemBorderEnabled()) {
|
static auto margins = QVariant::fromValue(QMargins(1, 1, 1, 1));
|
|
// 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);
|
}
|
|
// 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));
|
}
|
}
|
|
// Add managed window
|
addManagedWindow(m_windowHandle, hWnd, this);
|
}
|
|
bool Win32WindowContext::windowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam,
|
LRESULT *result) {
|
*result = FALSE;
|
|
// 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_DESTROY:
|
case WM_CLOSE:
|
case WM_NCDESTROY:
|
// Undocumented messages:
|
case WM_UAHDESTROYWINDOW:
|
case WM_UNREGISTER_WINDOW_SERVICES:
|
return false;
|
default:
|
break;
|
}
|
|
if (!isValidWindow(hWnd, false, true)) {
|
return false;
|
}
|
|
// Test snap layout
|
if (snapLayoutHandler(hWnd, message, wParam, lParam, result)) {
|
return true;
|
}
|
|
// Main implementation
|
if (customWindowHandler(hWnd, message, wParam, lParam, result)) {
|
return true;
|
}
|
|
// Whether to show system menu
|
if (systemMenuHandler(hWnd, message, wParam, lParam, result)) {
|
return true;
|
}
|
|
// Forward to native event filter subscribers
|
if (!m_nativeEventFilters.isEmpty()) {
|
MSG msg = createMessageBlock(hWnd, message, wParam, lParam);
|
QT_NATIVE_EVENT_RESULT_TYPE res = 0;
|
if (nativeDispatch(nativeEventType(), &msg, &res)) {
|
*result = LRESULT(res);
|
return true;
|
}
|
}
|
return false; // Not handled
|
}
|
|
bool Win32WindowContext::windowAttributeChanged(const QString &key, const QVariant &attribute,
|
const QVariant &oldAttribute) {
|
Q_UNUSED(oldAttribute)
|
|
const auto hwnd = reinterpret_cast<HWND>(m_windowId);
|
Q_ASSERT(hwnd);
|
|
const DynamicApis &apis = DynamicApis::instance();
|
const auto &extendMargins = [this, &apis, hwnd]() {
|
// For some unknown reason, the window background is totally black and extending
|
// the window frame into the client area seems to fix it magically.
|
// After many times of trying, we found that the Acrylic/Mica/Mica Alt background
|
// only appears on the native Win32 window's background, so naturally we want to
|
// extend the window frame into the whole client area to be able to let the special
|
// material fill the whole window. Previously we are using negative margins because
|
// it's widely known that using negative margins will let the window frame fill
|
// the whole window and that's indeed what we wanted to do, however, later we found
|
// that doing so is causing issues. When the user enabled the "show accent color on
|
// window title bar and borders" option on system personalize settings, a 30px bar
|
// would appear on window top. It has the same color with the system accent color.
|
// Actually it's the original title bar we've already hidden, and it magically
|
// appears again when we use negative margins to extend the window frame. And again
|
// after some experiments, I found that the title bar won't appear if we don't extend
|
// from the top side. In the end I found that we only need to extend from the left
|
// side if we extend long enough. In this way we can see the special material even
|
// when the host object is a QWidget and the title bar still remain hidden. But even
|
// though this solution seems perfect, I really don't know why it works. The following
|
// hack is totally based on experiments.
|
static constexpr const MARGINS margins = {65536, 0, 0, 0};
|
apis.pDwmExtendFrameIntoClientArea(hwnd, &margins);
|
};
|
const auto &restoreMargins = [this, &apis, hwnd]() {
|
auto margins = qmargins2margins(
|
windowAttribute(QStringLiteral("extra-margins")).value<QMargins>());
|
apis.pDwmExtendFrameIntoClientArea(hwnd, &margins);
|
};
|
|
const auto &effectBugWorkaround = [this, hwnd]() {
|
// We don't need the following *HACK* for QWidget windows.
|
// Completely based on actual experiments, root reason is totally unknown.
|
if (m_host->isWidgetType()) {
|
return;
|
}
|
static QSet<WId> bugWindowSet{};
|
if (bugWindowSet.contains(m_windowId)) {
|
return;
|
}
|
bugWindowSet.insert(m_windowId);
|
RECT rect{};
|
::GetWindowRect(hwnd, &rect);
|
::MoveWindow(hwnd, rect.left, rect.top, 1, 1, FALSE);
|
::MoveWindow(hwnd, rect.right - 1, rect.bottom - 1, 1, 1, FALSE);
|
::MoveWindow(hwnd, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top,
|
FALSE);
|
};
|
|
if (key == QStringLiteral("extra-margins")) {
|
auto margins = qmargins2margins(attribute.value<QMargins>());
|
return SUCCEEDED(apis.pDwmExtendFrameIntoClientArea(hwnd, &margins));
|
}
|
|
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);
|
}
|
const auto attr = isWin1020H1OrGreater() ? _DWMWA_USE_IMMERSIVE_DARK_MODE
|
: _DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20H1;
|
apis.pDwmSetWindowAttribute(hwnd, attr, &enable, sizeof(enable));
|
|
apis.pFlushMenuThemes();
|
return true;
|
}
|
|
// For Win11 or later
|
if (key == QStringLiteral("mica")) {
|
if (!isWin11OrGreater()) {
|
return false;
|
}
|
if (attribute.toBool()) {
|
extendMargins();
|
if (isWin1122H2OrGreater()) {
|
// Use official DWM API to enable Mica, available since Windows 11 22H2
|
// (10.0.22621).
|
const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_MAINWINDOW;
|
apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
|
sizeof(backdropType));
|
} else {
|
// Use undocumented DWM API to enable Mica, available since Windows 11
|
// (10.0.22000).
|
const BOOL enable = TRUE;
|
apis.pDwmSetWindowAttribute(hwnd, _DWMWA_MICA_EFFECT, &enable, sizeof(enable));
|
}
|
} else {
|
if (isWin1122H2OrGreater()) {
|
const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_AUTO;
|
apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
|
sizeof(backdropType));
|
} else {
|
const BOOL enable = FALSE;
|
apis.pDwmSetWindowAttribute(hwnd, _DWMWA_MICA_EFFECT, &enable, sizeof(enable));
|
}
|
restoreMargins();
|
}
|
effectBugWorkaround();
|
return true;
|
}
|
|
if (key == QStringLiteral("mica-alt")) {
|
if (!isWin1122H2OrGreater()) {
|
return false;
|
}
|
if (attribute.toBool()) {
|
extendMargins();
|
// Use official DWM API to enable Mica Alt, available since Windows 11 22H2
|
// (10.0.22621).
|
const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_TABBEDWINDOW;
|
apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
|
sizeof(backdropType));
|
} else {
|
const _DWM_SYSTEMBACKDROP_TYPE backdropType = _DWMSBT_AUTO;
|
apis.pDwmSetWindowAttribute(hwnd, _DWMWA_SYSTEMBACKDROP_TYPE, &backdropType,
|
sizeof(backdropType));
|
restoreMargins();
|
}
|
effectBugWorkaround();
|
return true;
|
}
|
|
if (key == QStringLiteral("acrylic-material")) {
|
if (!isWin11OrGreater()) {
|
return false;
|
}
|
if (attribute.toBool()) {
|
extendMargins();
|
|
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();
|
}
|
effectBugWorkaround();
|
return true;
|
}
|
|
if (key == QStringLiteral("dwm-blur")) {
|
// Extending window frame would break this effect for some unknown reason.
|
restoreMargins();
|
if (attribute.toBool()) {
|
if (isWin8OrGreater()) {
|
ACCENT_POLICY policy{};
|
policy.dwAccentState = ACCENT_ENABLE_BLURBEHIND;
|
policy.dwAccentFlags = ACCENT_NONE;
|
WINDOWCOMPOSITIONATTRIBDATA wcad{};
|
wcad.Attrib = WCA_ACCENT_POLICY;
|
wcad.pvData = &policy;
|
wcad.cbData = sizeof(policy);
|
apis.pSetWindowCompositionAttribute(hwnd, &wcad);
|
} else {
|
DWM_BLURBEHIND bb{};
|
bb.fEnable = TRUE;
|
bb.dwFlags = DWM_BB_ENABLE;
|
apis.pDwmEnableBlurBehindWindow(hwnd, &bb);
|
}
|
} else {
|
if (isWin8OrGreater()) {
|
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);
|
} else {
|
DWM_BLURBEHIND bb{};
|
bb.fEnable = FALSE;
|
bb.dwFlags = DWM_BB_ENABLE;
|
apis.pDwmEnableBlurBehindWindow(hwnd, &bb);
|
}
|
}
|
effectBugWorkaround();
|
return true;
|
}
|
return false;
|
}
|
|
QWK_USED static constexpr const struct {
|
const WPARAM wParam = MAKEWPARAM(44500, 61897);
|
const LPARAM lParam = MAKELPARAM(62662, 44982); // Not used. Reserve for future use.
|
} kMessageTag;
|
|
static inline quint64 getKeyState() {
|
quint64 result = 0;
|
const auto &get = [](const int virtualKey) -> bool {
|
return (::GetAsyncKeyState(virtualKey) < 0);
|
};
|
const bool buttonSwapped = ::GetSystemMetrics(SM_SWAPBUTTON);
|
if (get(VK_LBUTTON)) {
|
result |= (buttonSwapped ? MK_RBUTTON : MK_LBUTTON);
|
}
|
if (get(VK_RBUTTON)) {
|
result |= (buttonSwapped ? MK_LBUTTON : MK_RBUTTON);
|
}
|
if (get(VK_SHIFT)) {
|
result |= MK_SHIFT;
|
}
|
if (get(VK_CONTROL)) {
|
result |= MK_CONTROL;
|
}
|
if (get(VK_MBUTTON)) {
|
result |= MK_MBUTTON;
|
}
|
if (get(VK_XBUTTON1)) {
|
result |= MK_XBUTTON1;
|
}
|
if (get(VK_XBUTTON2)) {
|
result |= MK_XBUTTON2;
|
}
|
return result;
|
}
|
|
static void emulateClientAreaMessage(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam,
|
const std::optional<int> &overrideMessage = std::nullopt) {
|
const int myMsg = overrideMessage.value_or(message);
|
const auto wParamNew = [myMsg, wParam]() -> WPARAM {
|
if (myMsg == WM_NCMOUSELEAVE) {
|
// wParam is always ignored in mouse leave messages, but here we
|
// give them a special tag to be able to distinguish which messages
|
// are sent by ourselves.
|
return kMessageTag.wParam;
|
}
|
const quint64 keyState = getKeyState();
|
if ((myMsg >= WM_NCXBUTTONDOWN) && (myMsg <= WM_NCXBUTTONDBLCLK)) {
|
const auto xButtonMask = GET_XBUTTON_WPARAM(wParam);
|
return MAKEWPARAM(keyState, xButtonMask);
|
}
|
return keyState;
|
}();
|
const auto lParamNew = [myMsg, lParam, hWnd]() -> LPARAM {
|
if (myMsg == WM_NCMOUSELEAVE) {
|
// lParam is always ignored in mouse leave messages.
|
return 0;
|
}
|
const auto screenPos = POINT{GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)};
|
POINT clientPos = screenPos;
|
::ScreenToClient(hWnd, &clientPos);
|
return MAKELPARAM(clientPos.x, clientPos.y);
|
}();
|
#if 0
|
# define SEND_MESSAGE ::SendMessageW
|
#else
|
# define SEND_MESSAGE ::PostMessageW
|
#endif
|
switch (myMsg) {
|
case WM_NCHITTEST: // Treat hit test messages as mouse move events.
|
case WM_NCMOUSEMOVE:
|
SEND_MESSAGE(hWnd, WM_MOUSEMOVE, wParamNew, lParamNew);
|
break;
|
case WM_NCLBUTTONDOWN:
|
SEND_MESSAGE(hWnd, WM_LBUTTONDOWN, wParamNew, lParamNew);
|
break;
|
case WM_NCLBUTTONUP:
|
SEND_MESSAGE(hWnd, WM_LBUTTONUP, wParamNew, lParamNew);
|
break;
|
case WM_NCLBUTTONDBLCLK:
|
SEND_MESSAGE(hWnd, WM_LBUTTONDBLCLK, wParamNew, lParamNew);
|
break;
|
case WM_NCRBUTTONDOWN:
|
SEND_MESSAGE(hWnd, WM_RBUTTONDOWN, wParamNew, lParamNew);
|
break;
|
case WM_NCRBUTTONUP:
|
SEND_MESSAGE(hWnd, WM_RBUTTONUP, wParamNew, lParamNew);
|
break;
|
case WM_NCRBUTTONDBLCLK:
|
SEND_MESSAGE(hWnd, WM_RBUTTONDBLCLK, wParamNew, lParamNew);
|
break;
|
case WM_NCMBUTTONDOWN:
|
SEND_MESSAGE(hWnd, WM_MBUTTONDOWN, wParamNew, lParamNew);
|
break;
|
case WM_NCMBUTTONUP:
|
SEND_MESSAGE(hWnd, WM_MBUTTONUP, wParamNew, lParamNew);
|
break;
|
case WM_NCMBUTTONDBLCLK:
|
SEND_MESSAGE(hWnd, WM_MBUTTONDBLCLK, wParamNew, lParamNew);
|
break;
|
case WM_NCXBUTTONDOWN:
|
SEND_MESSAGE(hWnd, WM_XBUTTONDOWN, wParamNew, lParamNew);
|
break;
|
case WM_NCXBUTTONUP:
|
SEND_MESSAGE(hWnd, WM_XBUTTONUP, wParamNew, lParamNew);
|
break;
|
case WM_NCXBUTTONDBLCLK:
|
SEND_MESSAGE(hWnd, WM_XBUTTONDBLCLK, wParamNew, lParamNew);
|
break;
|
#if 0 // ### TODO: How to handle touch events?
|
case WM_NCPOINTERUPDATE:
|
case WM_NCPOINTERDOWN:
|
case WM_NCPOINTERUP:
|
break;
|
#endif
|
case WM_NCMOUSEHOVER:
|
SEND_MESSAGE(hWnd, WM_MOUSEHOVER, wParamNew, lParamNew);
|
break;
|
case WM_NCMOUSELEAVE:
|
SEND_MESSAGE(hWnd, WM_MOUSELEAVE, wParamNew, lParamNew);
|
break;
|
default:
|
// unreachable
|
break;
|
}
|
|
#undef SEND_MESSAGE
|
}
|
|
static inline void requestForMouseLeaveMessage(HWND hWnd, bool nonClient) {
|
TRACKMOUSEEVENT tme{};
|
tme.cbSize = sizeof(tme);
|
tme.dwFlags = TME_LEAVE;
|
if (nonClient) {
|
tme.dwFlags |= TME_NONCLIENT;
|
}
|
tme.hwndTrack = hWnd;
|
tme.dwHoverTime = HOVER_DEFAULT;
|
::TrackMouseEvent(&tme);
|
}
|
|
bool Win32WindowContext::snapLayoutHandler(HWND hWnd, UINT message, WPARAM wParam,
|
LPARAM lParam, LRESULT *result) {
|
switch (message) {
|
case WM_MOUSELEAVE: {
|
if (wParam != kMessageTag.wParam) {
|
// Qt will call TrackMouseEvent() to get the WM_MOUSELEAVE message when it
|
// receives WM_MOUSEMOVE messages, and since we are converting every
|
// WM_NCMOUSEMOVE message to WM_MOUSEMOVE message and send it back to the window
|
// to be able to hover our controls, we also get lots of WM_MOUSELEAVE messages
|
// at the same time because of the reason above, and these superfluous mouse
|
// leave events cause Qt to think the mouse has left the control, and thus we
|
// actually lost the hover state. So we filter out these superfluous mouse leave
|
// events here to avoid this issue.
|
DWORD dwScreenPos = ::GetMessagePos();
|
POINT screenPoint{GET_X_LPARAM(dwScreenPos), GET_Y_LPARAM(dwScreenPos)};
|
::ScreenToClient(hWnd, &screenPoint);
|
QPoint qtScenePos = QHighDpi::fromNativeLocalPosition(point2qpoint(screenPoint),
|
m_windowHandle.data());
|
auto dummy = WindowAgentBase::Unknown;
|
if (isInSystemButtons(qtScenePos, &dummy)) {
|
// We must record whether the last WM_MOUSELEAVE was filtered, because if
|
// Qt does not receive this message it will not call TrackMouseEvent()
|
// again, resulting in the client area not responding to any mouse event.
|
mouseLeaveBlocked = true;
|
*result = FALSE;
|
return true;
|
}
|
}
|
mouseLeaveBlocked = false;
|
break;
|
}
|
|
case WM_MOUSEMOVE: {
|
// At appropriate time, we will call TrackMouseEvent() for Qt. Simultaneously,
|
// we unset `mouseLeaveBlocked` mark and pretend as if Qt has received
|
// WM_MOUSELEAVE.
|
if (lastHitTestResult != WindowPart::ChromeButton && mouseLeaveBlocked) {
|
mouseLeaveBlocked = false;
|
requestForMouseLeaveMessage(hWnd, false);
|
}
|
break;
|
}
|
|
case WM_NCMOUSEMOVE:
|
case WM_NCLBUTTONDOWN:
|
case WM_NCLBUTTONUP:
|
case WM_NCLBUTTONDBLCLK:
|
case WM_NCRBUTTONDOWN:
|
case WM_NCRBUTTONUP:
|
case WM_NCRBUTTONDBLCLK:
|
case WM_NCMBUTTONDOWN:
|
case WM_NCMBUTTONUP:
|
case WM_NCMBUTTONDBLCLK:
|
case WM_NCXBUTTONDOWN:
|
case WM_NCXBUTTONUP:
|
case WM_NCXBUTTONDBLCLK:
|
#if 0 // ### TODO: How to handle touch events?
|
case WM_NCPOINTERUPDATE:
|
case WM_NCPOINTERDOWN:
|
case WM_NCPOINTERUP:
|
#endif
|
case WM_NCMOUSEHOVER: {
|
if (message == WM_NCMOUSEMOVE) {
|
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
|
// 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 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);
|
}
|
}
|
}
|
|
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);
|
emulateClientAreaMessage(hWnd, message, wParam, lParam);
|
return true;
|
}
|
|
if (lastHitTestResultRaw == HTSYSMENU) {
|
switch (message) {
|
case WM_NCLBUTTONDOWN:
|
if (iconButtonClickLevel == 0) {
|
// 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;
|
if (iconButtonClickLevel & IconButtonTriggersClose) {
|
::PostMessageW(hWnd, WM_SYSCOMMAND, SC_CLOSE, 0);
|
}
|
if (iconButtonClickLevel & IconButtonDoubleClicked) {
|
iconButtonClickLevel = 0;
|
}
|
// Otherwise, no need to reset `iconButtonClickLevel` if not to
|
// close, if it has value, there must be another incoming
|
// WM_NCLBUTTONDOWN
|
} else {
|
iconButtonClickLevel = 0;
|
}
|
break;
|
case WM_NCLBUTTONDBLCLK:
|
// A message of WM_SYSCOMMAND with SC_CLOSE will be sent by Windows
|
*result = ::DefWindowProcW(hWnd, message, wParam, lParam);
|
break;
|
default:
|
*result = FALSE;
|
emulateClientAreaMessage(hWnd, message, wParam, lParam);
|
break;
|
}
|
} 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
|
// all other messages we should return zero instead.
|
*result =
|
(((message >= WM_NCXBUTTONDOWN) && (message <= WM_NCXBUTTONDBLCLK))
|
? TRUE
|
: FALSE);
|
emulateClientAreaMessage(hWnd, message, wParam, lParam);
|
}
|
return true;
|
}
|
break;
|
}
|
|
case WM_NCMOUSELEAVE: {
|
const WindowPart currentWindowPart = lastHitTestResult;
|
if (currentWindowPart == WindowPart::ChromeButton) {
|
// If we press on the chrome button and move mouse, Windows will take the
|
// 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. (May be redundant?)
|
if (mouseLeaveBlocked) {
|
mouseLeaveBlocked = false;
|
requestForMouseLeaveMessage(hWnd, false);
|
}
|
} else {
|
if (mouseLeaveBlocked) {
|
// The mouse is moving from the chrome button to other non-client area, we
|
// should emulate a WM_MOUSELEAVE message to reset the button state.
|
emulateClientAreaMessage(hWnd, message, wParam, lParam, WM_NCMOUSELEAVE);
|
}
|
|
if (currentWindowPart == WindowPart::Outside) {
|
// Notice: we're not going to clear window part cache when the mouse leaves
|
// 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);
|
}
|
}
|
break;
|
}
|
|
default:
|
break;
|
}
|
return false;
|
}
|
|
bool Win32WindowContext::customWindowHandler(HWND hWnd, UINT message, WPARAM wParam,
|
LPARAM lParam, LRESULT *result) {
|
switch (message) {
|
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，虽然看起来效果还不错，但对于此项目而言，代码和窗口结构过于复
|
// 杂，因此我没有采用此方案。然而，对于具体的软件项目而言，其做法也
|
// 不失为一个优秀的解决方案，毕竟其在大多数条件下的表现都还可以。
|
//
|
// 和1.x的做法不同，现在的2.x选择了保留窗口三边，去除整个窗口顶部，
|
// 好处是保留了系统的原生边框，外观较好，且与系统结合紧密，而且resize
|
// 的表现也有很大改善，缺点是需要自行绘制顶部边框线。原本以为只能像
|
// Windows Terminal那样在WM_PAINT里搞黑魔法，但后来发现，其实只
|
// 要颜色相近，我们自行绘制一根实线也几乎能以假乱真，而且这样也不会
|
// 破坏Qt自己的绘制系统，能做到不依赖黑魔法就能实现像Windows Terminal
|
// 那样外观和功能都比较完美的自定义边框。
|
|
// 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.
|
//
|
// Unlike the 1.x code, we choose to preserve the three edges of the
|
// window in 2.x, and get rid of the whole top part of the window.
|
// There are quite some advantages such as the appearance looks much
|
// better and due to we have the original system window frame, our
|
// window can behave just like a normal Win32 window even if we now
|
// doesn't have a title bar at all. Most importantly, the flicker and
|
// jitter during window resizing is totally gone now. The disadvantage
|
// is we have to draw a top frame border ourselves. Previously I thought
|
// we have to do the black magic in WM_PAINT just like what Windows
|
// 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]() {
|
lastHitTestResultRaw = int(*result);
|
lastHitTestResult = getHitWindowPart(lastHitTestResultRaw);
|
});
|
|
POINT nativeGlobalPos{GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)};
|
POINT nativeLocalPos = nativeGlobalPos;
|
::ScreenToClient(hWnd, &nativeLocalPos);
|
|
RECT clientRect{0, 0, 0, 0};
|
::GetClientRect(hWnd, &clientRect);
|
auto clientWidth = RECT_WIDTH(clientRect);
|
auto clientHeight = RECT_HEIGHT(clientRect);
|
|
QPoint qtScenePos = QHighDpi::fromNativeLocalPosition(point2qpoint(nativeLocalPos),
|
m_windowHandle.data());
|
|
int frameSize = getResizeBorderThickness(hWnd);
|
|
bool isFixedWidth = isHostWidthFixed();
|
bool isFixedHeight = isHostHeightFixed();
|
bool isFixedSize = isHostSizeFixed();
|
bool isInLeftBorder = nativeLocalPos.x <= frameSize;
|
bool isInTopBorder = nativeLocalPos.y <= frameSize;
|
bool isInRightBorder = nativeLocalPos.x > clientWidth - frameSize;
|
bool isInBottomBorder = nativeLocalPos.y > clientHeight - frameSize;
|
bool isInTitleBar = isInTitleBarDraggableArea(qtScenePos);
|
WindowAgentBase::SystemButton sysButtonType = WindowAgentBase::Unknown;
|
bool isInCaptionButtons = isInSystemButtons(qtScenePos, &sysButtonType);
|
static constexpr bool dontOverrideCursor = false; // ### TODO
|
|
if (isInCaptionButtons) {
|
// Firstly, we set the hit test result to a default value to be able to detect
|
// whether we have changed it or not afterwards.
|
*result = HTNOWHERE;
|
// Even if the mouse is inside the chrome button area now, we should still allow
|
// the user to be able to resize the window with the top or right window border,
|
// this is also the normal behavior of a native Win32 window (but only when the
|
// window is not maximized/fullscreen/minimized, of course).
|
if (isWindowNoState(hWnd)) {
|
static constexpr const quint8 kBorderSize = 2;
|
bool isTop = nativeLocalPos.y <= kBorderSize;
|
bool isLeft = nativeLocalPos.x <= kBorderSize;
|
bool isRight = nativeLocalPos.x > clientWidth - kBorderSize;
|
if (isTop || isLeft || isRight) {
|
if (isFixedSize || dontOverrideCursor) {
|
// The user doesn't want the window to be resized, so we tell
|
// Windows we are in the client area so that the controls beneath
|
// the mouse cursor can still be hovered or clicked.
|
*result = isInTitleBar ? HTCAPTION : HTCLIENT;
|
} else {
|
if (isTop) {
|
if (isLeft) {
|
if (isFixedWidth) {
|
*result = HTTOP;
|
} else if (isFixedHeight) {
|
*result = HTLEFT;
|
} else {
|
*result = HTTOPLEFT;
|
}
|
} else if (isRight) {
|
if (isFixedWidth) {
|
*result = HTTOP;
|
} else if (isFixedHeight) {
|
*result = HTRIGHT;
|
} else {
|
*result = HTTOPRIGHT;
|
}
|
} else {
|
*result = isFixedHeight ? HTBORDER : HTTOP;
|
}
|
} else {
|
if (isFixedWidth) {
|
*result = HTBORDER;
|
} else {
|
*result = isLeft ? HTLEFT : HTRIGHT;
|
}
|
}
|
}
|
}
|
}
|
if (*result == HTNOWHERE) {
|
// OK, we are now really inside one of the chrome buttons, tell Windows the
|
// exact role of our button. The Snap Layout feature introduced in Windows
|
// 11 won't work without this.
|
switch (sysButtonType) {
|
case WindowAgentBase::WindowIcon:
|
*result = HTSYSMENU;
|
break;
|
case WindowAgentBase::Help:
|
*result = HTHELP;
|
break;
|
case WindowAgentBase::Minimize:
|
*result = HTREDUCE;
|
break;
|
case WindowAgentBase::Maximize:
|
*result = HTZOOM;
|
break;
|
case WindowAgentBase::Close:
|
*result = HTCLOSE;
|
break;
|
default:
|
// unreachable
|
break;
|
}
|
}
|
if (*result == HTNOWHERE) {
|
// OK, it seems we are not inside the window resize area, nor inside the
|
// chrome buttons, tell Windows we are in the client area to let Qt handle
|
// this event.
|
*result = HTCLIENT;
|
}
|
return true;
|
}
|
// OK, we are not inside any chrome buttons, try to find out which part of the
|
// window are we hitting.
|
|
bool max = isMaximized(hWnd);
|
bool full = isFullScreen(hWnd);
|
|
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);
|
if (originalHitTestResult != HTCLIENT) {
|
// Even if the window is not resizable, we still can't return HTCLIENT here
|
// because when we enter this code path, it means the mouse cursor is
|
// outside the window, that is, the three transparent window resize area.
|
// Returning HTCLIENT will confuse Windows, we can't put our controls there
|
// anyway.
|
*result = HTNOWHERE; // Make sure we can know we don't set any value
|
// explicitly later.
|
if (originalHitTestResult == HTCAPTION) {
|
} else if (isFixedSize || dontOverrideCursor) {
|
*result = HTBORDER;
|
} else if (isFixedWidth || isFixedHeight) {
|
if (originalHitTestResult == HTTOPLEFT) {
|
if (isFixedWidth) {
|
*result = HTTOP;
|
} else {
|
*result = HTLEFT;
|
}
|
} else if (originalHitTestResult == HTTOPRIGHT) {
|
if (isFixedWidth) {
|
*result = HTTOP;
|
} else {
|
*result = HTRIGHT;
|
}
|
} else if (originalHitTestResult == HTBOTTOMRIGHT) {
|
if (isFixedWidth) {
|
*result = HTBOTTOM;
|
} else {
|
*result = HTRIGHT;
|
}
|
} else if (originalHitTestResult == HTBOTTOMLEFT) {
|
if (isFixedWidth) {
|
*result = HTBOTTOM;
|
} else {
|
*result = HTLEFT;
|
}
|
} else if (originalHitTestResult == HTLEFT ||
|
originalHitTestResult == HTRIGHT) {
|
if (isFixedWidth) {
|
*result = HTBORDER;
|
}
|
} else if (originalHitTestResult == HTTOP ||
|
originalHitTestResult == HTBOTTOM) {
|
if (isFixedHeight) {
|
*result = HTBORDER;
|
}
|
}
|
}
|
if (*result == HTNOWHERE) {
|
*result = originalHitTestResult;
|
}
|
return true;
|
}
|
if (full) {
|
*result = HTCLIENT;
|
return true;
|
}
|
if (max) {
|
*result = isInTitleBar ? HTCAPTION : HTCLIENT;
|
return true;
|
}
|
// 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
|
// resize the window.
|
if (isInTopBorder) {
|
// Return HTCLIENT instead of HTBORDER here, because the mouse is
|
// inside our homemade title bar now, return HTCLIENT to let our
|
// title bar can still capture mouse events.
|
*result = [&]() {
|
if (isFixedSize || isFixedHeight || dontOverrideCursor ||
|
(isFixedWidth && (isInLeftBorder || isInRightBorder))) {
|
if (isInTitleBar) {
|
return HTCAPTION;
|
} else {
|
return HTCLIENT;
|
}
|
} else {
|
return HTTOP;
|
}
|
}();
|
return true;
|
}
|
if (isInTitleBar) {
|
*result = HTCAPTION;
|
return true;
|
}
|
*result = HTCLIENT;
|
return true;
|
} else {
|
if (full) {
|
*result = HTCLIENT;
|
return true;
|
}
|
if (max || isFixedSize || dontOverrideCursor) {
|
*result = isInTitleBar ? HTCAPTION : HTCLIENT;
|
return true;
|
}
|
if (isFixedWidth || isFixedHeight) {
|
if (isInLeftBorder && isInTopBorder) {
|
if (isFixedWidth) {
|
*result = HTTOP;
|
} else {
|
*result = HTLEFT;
|
}
|
} else if (isInRightBorder && isInTopBorder) {
|
if (isFixedWidth) {
|
*result = HTTOP;
|
} else {
|
*result = HTRIGHT;
|
}
|
} else if (isInRightBorder && isInBottomBorder) {
|
if (isFixedWidth) {
|
*result = HTBOTTOM;
|
} else {
|
*result = HTRIGHT;
|
}
|
} else if (isInLeftBorder && isInBottomBorder) {
|
if (isFixedWidth) {
|
*result = HTBOTTOM;
|
} else {
|
*result = HTLEFT;
|
}
|
} else if (isInLeftBorder || isInRightBorder) {
|
if (isFixedWidth) {
|
*result = HTCLIENT;
|
} else {
|
*result = isInLeftBorder ? HTLEFT : HTRIGHT;
|
}
|
} else if (isInTopBorder || isInBottomBorder) {
|
if (isFixedHeight) {
|
*result = HTCLIENT;
|
} else {
|
*result = isInTopBorder ? HTTOP : HTBOTTOM;
|
}
|
} else {
|
*result = HTCLIENT;
|
}
|
return true;
|
} else {
|
if (isInTopBorder) {
|
if (isInLeftBorder) {
|
*result = HTTOPLEFT;
|
return true;
|
}
|
if (isInRightBorder) {
|
*result = HTTOPRIGHT;
|
return true;
|
}
|
*result = HTTOP;
|
return true;
|
}
|
if (isInBottomBorder) {
|
if (isInLeftBorder) {
|
*result = HTBOTTOMLEFT;
|
return true;
|
}
|
if (isInRightBorder) {
|
*result = HTBOTTOMRIGHT;
|
return true;
|
}
|
*result = HTBOTTOM;
|
return true;
|
}
|
if (isInLeftBorder) {
|
*result = HTLEFT;
|
return true;
|
}
|
if (isInRightBorder) {
|
*result = HTRIGHT;
|
return true;
|
}
|
}
|
if (isInTitleBar) {
|
*result = HTCAPTION;
|
return true;
|
}
|
*result = HTCLIENT;
|
return true;
|
}
|
}
|
|
case WM_WINDOWPOSCHANGING: {
|
// ### FIXME: How does this problem happen and why is it solved?
|
// When toggling the "Show theme color in title bar and window border" setting in
|
// Windows Settings, or calling `DrawMenuBar()`, Windows sends a message of
|
// WM_WINDOWPOSCHANGING with flags 0x37. If we do not process this message,
|
// 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 == kBadWindowPosFlag) {
|
windowPos->flags |= SWP_NOCOPYBITS;
|
}
|
break;
|
}
|
|
case WM_SHOWWINDOW: {
|
if (!wParam || !isWindowNoState(hWnd) || isFullScreen(hWnd)) {
|
break;
|
}
|
RECT windowRect{};
|
::GetWindowRect(hWnd, &windowRect);
|
static constexpr const auto swpFlags = SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE | SWP_FRAMECHANGED | SWP_NOOWNERZORDER;
|
::SetWindowPos(hWnd, nullptr, 0, 0, RECT_WIDTH(windowRect) + 1, RECT_HEIGHT(windowRect) + 1, swpFlags);
|
::SetWindowPos(hWnd, nullptr, 0, 0, RECT_WIDTH(windowRect), RECT_HEIGHT(windowRect), swpFlags);
|
break;
|
}
|
|
default:
|
break;
|
}
|
|
if (!isSystemBorderEnabled()) {
|
switch (message) {
|
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 = FALSE;
|
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 = FALSE;
|
return true;
|
} else {
|
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" here, otherwise the window won't respond to the
|
// window activation state change.
|
*result = ::DefWindowProcW(hWnd, WM_NCACTIVATE, wParam, -1);
|
} else {
|
*result = TRUE;
|
}
|
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 = static_cast<DWORD>(::GetWindowLongPtrW(hWnd, GWL_STYLE));
|
// Prevent Windows from drawing the default title bar by temporarily
|
// toggling the WS_VISIBLE style.
|
const DWORD newStyle = (oldStyle & ~WS_VISIBLE);
|
::SetWindowLongPtrW(hWnd, GWL_STYLE, static_cast<LONG_PTR>(newStyle));
|
triggerFrameChange(hWnd);
|
const LRESULT originalResult = ::DefWindowProcW(hWnd, message, wParam, lParam);
|
::SetWindowLongPtrW(hWnd, GWL_STYLE, static_cast<LONG_PTR>(oldStyle));
|
triggerFrameChange(hWnd);
|
*result = originalResult;
|
return true;
|
}
|
default:
|
break;
|
}
|
}
|
return false;
|
}
|
|
bool Win32WindowContext::nonClientCalcSizeHandler(HWND hWnd, UINT message, WPARAM wParam,
|
LPARAM lParam, LRESULT *result) {
|
Q_UNUSED(message)
|
Q_UNUSED(this)
|
|
// 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.
|
|
// If `wParam` is `FALSE`, `lParam` points to a `RECT` that contains
|
// the proposed window rectangle for our window. During our
|
// processing of the `WM_NCCALCSIZE` message, we are expected to
|
// modify the `RECT` that `lParam` points to, so that its value upon
|
// our return is the new client area. We must return 0 if `wParam`
|
// is `FALSE`.
|
// If `wParam` is `TRUE`, `lParam` points to a `NCCALCSIZE_PARAMS`
|
// struct. This struct contains an array of 3 `RECT`s, the first of
|
// which has the exact same meaning as the `RECT` that is pointed to
|
// by `lParam` when `wParam` is `FALSE`. The remaining `RECT`s, in
|
// conjunction with our return value, can
|
// be used to specify portions of the source and destination window
|
// rectangles that are valid and should be preserved. We opt not to
|
// implement an elaborate client-area preservation technique, and
|
// simply return 0, which means "preserve the entire old client area
|
// 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);
|
[[maybe_unused]] const auto &flickerReducer = qScopeGuard([this]() {
|
// When we receive this message, it means the window size has changed
|
// already, and it seems this message always come before any client
|
// area size notifications (eg. WM_WINDOWPOSCHANGED and WM_SIZE). Let
|
// D3D/VK paint immediately to let user see the latest result as soon
|
// as possible.
|
const auto &isTargetSurface = [](const QSurface::SurfaceType st) {
|
return st != QSurface::RasterSurface && st != QSurface::OpenGLSurface &&
|
st != QSurface::RasterGLSurface && st != QSurface::OpenVGSurface;
|
};
|
if (m_windowHandle && isTargetSurface(m_windowHandle->surfaceType()) &&
|
isDwmCompositionEnabled() && DynamicApis::instance().pDwmFlush) {
|
DynamicApis::instance().pDwmFlush();
|
}
|
});
|
if (isSystemBorderEnabled()) {
|
// Store the original top margin before the default window procedure applies the
|
// default frame.
|
const LONG originalTop = clientRect->top;
|
// Apply the default frame because we don't want to remove the whole window
|
// frame, we still need the standard window frame (the resizable frame border
|
// and the frame shadow) for the left, bottom and right edges. If we return 0
|
// here directly, the whole window frame will be removed (which means there will
|
// be no resizable frame border and the frame shadow will also disappear), and
|
// that's also how most applications customize their title bars on Windows. It's
|
// totally OK but since we want to preserve as much original frame as possible,
|
// we can't use that solution.
|
const LRESULT originalResult = ::DefWindowProcW(hWnd, WM_NCCALCSIZE, wParam, lParam);
|
if (originalResult != 0) {
|
*result = originalResult;
|
return true;
|
}
|
// Re-apply the original top from before the size of the default frame was
|
// applied, and the whole top frame (the title bar and the top border) is gone
|
// now. For the top frame, we only has 2 choices: (1) remove the top frame
|
// entirely, or (2) don't touch it at all. We can't preserve the top border by
|
// adjusting the top margin here. If we try to modify the top margin, the
|
// original title bar will always be painted by DWM regardless what margin we
|
// set, so here we can only remove the top frame entirely and use some special
|
// 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
|
// have the WS_POPUP size, so we don't have to worry about
|
// borders, and the default frame will be fine.
|
if (max && !full) {
|
// When a window is maximized, its size is actually a little bit more
|
// than the monitor's work area. The window is positioned and sized in
|
// such a way that the resize handles are outside the monitor and
|
// then the window is clipped to the monitor so that the resize handle
|
// do not appear because you don't need them (because you can't resize
|
// a window when it's maximized unless you restore it).
|
const quint32 frameSize = getResizeBorderThickness(hWnd);
|
clientRect->top += frameSize;
|
if (!isSystemBorderEnabled()) {
|
clientRect->bottom -= frameSize;
|
clientRect->left += frameSize;
|
clientRect->right -= frameSize;
|
}
|
}
|
// 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 (max || full) {
|
APPBARDATA abd{};
|
abd.cbSize = sizeof(abd);
|
const UINT taskbarState = ::SHAppBarMessage(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 was introduced in Windows 8.1,
|
// we have to use another way to judge this if we are running
|
// on Windows 7 or Windows 8.
|
if (isWin8Point1OrGreater()) {
|
const RECT monitorRect = getMonitorForWindow(hWnd).rcMonitor;
|
// This helper can be used to determine if there's an
|
// auto-hide taskbar on the given edge of the monitor
|
// we're currently on.
|
const auto hasAutohideTaskbar = [monitorRect](const UINT edge) -> bool {
|
APPBARDATA abd2{};
|
abd2.cbSize = sizeof(abd2);
|
abd2.uEdge = edge;
|
abd2.rc = monitorRect;
|
const auto hTaskbar =
|
reinterpret_cast<HWND>(::SHAppBarMessage(ABM_GETAUTOHIDEBAREX, &abd2));
|
return (hTaskbar != nullptr);
|
};
|
top = hasAutohideTaskbar(ABE_TOP);
|
bottom = hasAutohideTaskbar(ABE_BOTTOM);
|
left = hasAutohideTaskbar(ABE_LEFT);
|
right = hasAutohideTaskbar(ABE_RIGHT);
|
} else {
|
int edge = -1;
|
APPBARDATA abd2{};
|
abd2.cbSize = sizeof(abd2);
|
abd2.hWnd = ::FindWindowW(L"Shell_TrayWnd", nullptr);
|
HMONITOR windowMonitor = ::MonitorFromWindow(hWnd, MONITOR_DEFAULTTONEAREST);
|
HMONITOR taskbarMonitor =
|
::MonitorFromWindow(abd2.hWnd, MONITOR_DEFAULTTOPRIMARY);
|
if (taskbarMonitor == windowMonitor) {
|
::SHAppBarMessage(ABM_GETTASKBARPOS, &abd2);
|
edge = int(abd2.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 += kAutoHideTaskBarThickness;
|
} else if (bottom) {
|
clientRect->bottom -= kAutoHideTaskBarThickness;
|
} else if (left) {
|
clientRect->left += kAutoHideTaskBarThickness;
|
} else if (right) {
|
clientRect->right -= kAutoHideTaskBarThickness;
|
}
|
}
|
}
|
// By returning WVR_REDRAW we can make the window resizing look
|
// less broken. But we must return 0 if wParam is FALSE, according to Microsoft
|
// Docs.
|
// **IMPORTANT NOTE**:
|
// If you are drawing something manually through D3D in your window, don't
|
// try to return WVR_REDRAW here, otherwise Windows exhibits bugs where
|
// client pixels and child windows are mispositioned by the width/height
|
// of the upper-left non-client area. It's confirmed that this issue exists
|
// from Windows 7 to Windows 10. Not tested on Windows 11 yet. Don't know
|
// whether it exists on Windows XP to Windows Vista or not.
|
|
// https://github.com/chromium/chromium/blob/5d297da3cf2a642e9ace2b23fed097370bc70814/ui/views/win/hwnd_message_handler.cc#L2330
|
// Do not return WVR_REDRAW otherwise child HWNDs will be mispositioned.
|
*result = FALSE;
|
return true;
|
}
|
|
bool Win32WindowContext::systemMenuHandler(HWND hWnd, UINT message, WPARAM wParam,
|
LPARAM lParam, LRESULT *result) {
|
const auto getNativePosFromMouse = [lParam]() -> POINT {
|
return {GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)};
|
};
|
const auto getNativeGlobalPosFromKeyboard = [hWnd]() -> POINT {
|
const bool maxOrFull = isMaximized(hWnd) || isFullScreen(hWnd);
|
const quint32 frameSize = getResizeBorderThickness(hWnd);
|
const quint32 horizontalOffset =
|
((maxOrFull || !isSystemBorderEnabled()) ? 0 : frameSize);
|
const auto verticalOffset = [hWnd, maxOrFull, frameSize]() -> quint32 {
|
const quint32 titleBarHeight = getTitleBarHeight(hWnd);
|
if (!isSystemBorderEnabled()) {
|
return titleBarHeight;
|
}
|
if (isWin11OrGreater()) {
|
if (maxOrFull) {
|
return (titleBarHeight + frameSize);
|
}
|
return titleBarHeight;
|
}
|
if (maxOrFull) {
|
return titleBarHeight;
|
}
|
return titleBarHeight - frameSize;
|
}();
|
RECT windowPos{};
|
::GetWindowRect(hWnd, &windowPos);
|
return {static_cast<LONG>(windowPos.left + horizontalOffset),
|
static_cast<LONG>(windowPos.top + verticalOffset)};
|
};
|
bool shouldShowSystemMenu = false;
|
bool broughtByKeyboard = false;
|
POINT nativeGlobalPos{};
|
|
switch (message) {
|
case WM_RBUTTONUP: {
|
const POINT nativeLocalPos = getNativePosFromMouse();
|
const QPoint qtScenePos = QHighDpi::fromNativeLocalPosition(
|
point2qpoint(nativeLocalPos), m_windowHandle.data());
|
WindowAgentBase::SystemButton sysButtonType = WindowAgentBase::Unknown;
|
if (isInTitleBarDraggableArea(qtScenePos) ||
|
(isInSystemButtons(qtScenePos, &sysButtonType) &&
|
sysButtonType == WindowAgentBase::WindowIcon)) {
|
shouldShowSystemMenu = true;
|
nativeGlobalPos = nativeLocalPos;
|
::ClientToScreen(hWnd, &nativeGlobalPos);
|
}
|
break;
|
}
|
case WM_NCRBUTTONUP: {
|
if (wParam == HTCAPTION) {
|
shouldShowSystemMenu = true;
|
nativeGlobalPos = getNativePosFromMouse();
|
}
|
break;
|
}
|
case WM_SYSCOMMAND: {
|
const WPARAM filteredWParam = (wParam & 0xFFF0);
|
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;
|
}
|
case WM_KEYDOWN:
|
case WM_SYSKEYDOWN: {
|
const bool altPressed = ((wParam == VK_MENU) || (::GetKeyState(VK_MENU) < 0));
|
const bool spacePressed = ((wParam == VK_SPACE) || (::GetKeyState(VK_SPACE) < 0));
|
if (altPressed && spacePressed) {
|
shouldShowSystemMenu = true;
|
broughtByKeyboard = true;
|
nativeGlobalPos = getNativeGlobalPosFromKeyboard();
|
}
|
break;
|
}
|
default:
|
break;
|
}
|
if (shouldShowSystemMenu) {
|
static HHOOK mouseHook = nullptr;
|
static std::optional<POINT> mouseClickPos;
|
static bool mouseDoubleClicked = false;
|
bool mouseHookedLocal = false;
|
|
// The menu is triggered by a click on icon button
|
if (iconButtonClickTime > 0) {
|
POINT menuPos{0, static_cast<LONG>(getTitleBarHeight(hWnd))};
|
if (const auto tb = titleBar()) {
|
auto titleBarHeight = qreal(m_delegate->mapGeometryToScene(tb).height());
|
titleBarHeight *= m_windowHandle->devicePixelRatio();
|
menuPos.y = qRound(titleBarHeight);
|
}
|
::ClientToScreen(hWnd, &menuPos);
|
nativeGlobalPos = menuPos;
|
|
// Install mouse hook
|
if (!mouseHook) {
|
mouseHook = ::SetWindowsHookExW(
|
WH_MOUSE,
|
[](int nCode, WPARAM wParam, LPARAM lParam) -> LRESULT {
|
if (nCode >= 0) {
|
switch (wParam) {
|
case WM_LBUTTONDBLCLK:
|
mouseDoubleClicked = true;
|
Q_FALLTHROUGH();
|
|
// case WM_POINTERDOWN:
|
|
case WM_LBUTTONDOWN: {
|
auto pMouseStruct =
|
reinterpret_cast<MOUSEHOOKSTRUCT *>(lParam);
|
if (pMouseStruct) {
|
mouseClickPos = pMouseStruct->pt;
|
}
|
break;
|
}
|
default:
|
break;
|
}
|
}
|
return ::CallNextHookEx(nullptr, nCode, wParam, lParam);
|
},
|
nullptr, ::GetCurrentThreadId());
|
mouseHookedLocal = true;
|
}
|
}
|
|
bool res =
|
showSystemMenu_sys(hWnd, nativeGlobalPos, broughtByKeyboard, isHostSizeFixed());
|
|
// Uninstall mouse hook and check if it's a double-click
|
if (mouseHookedLocal) {
|
::UnhookWindowsHookEx(mouseHook);
|
|
// Emulate the Windows icon button's behavior
|
if (!res && mouseClickPos.has_value()) {
|
POINT nativeLocalPos = mouseClickPos.value();
|
::ScreenToClient(hWnd, &nativeLocalPos);
|
QPoint qtScenePos = QHighDpi::fromNativeLocalPosition(
|
point2qpoint(nativeLocalPos), m_windowHandle.data());
|
WindowAgentBase::SystemButton sysButtonType = WindowAgentBase::Unknown;
|
if (isInSystemButtons(qtScenePos, &sysButtonType) &&
|
sysButtonType == WindowAgentBase::WindowIcon) {
|
iconButtonClickLevel |= IconButtonClicked;
|
if (::GetTickCount64() - iconButtonClickTime <= ::GetDoubleClickTime()) {
|
iconButtonClickLevel |= IconButtonTriggersClose;
|
}
|
}
|
}
|
|
if (mouseDoubleClicked) {
|
iconButtonClickLevel |= IconButtonDoubleClicked;
|
}
|
|
mouseHook = nullptr;
|
mouseClickPos.reset();
|
mouseDoubleClicked = false;
|
}
|
|
// 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
|
// entering Qt's own handling logic.
|
*result = FALSE;
|
return true;
|
}
|
return false;
|
}
|
|
}
|
