From 183aa9a7307adb54ed18d502e1399001696c1dd2 Mon Sep 17 00:00:00 2001 From: Altair Wei Date: Wed, 6 Oct 2021 15:10:53 +0800 Subject: [PATCH] integrate Windows implementation into 2.0 Core API --- examples/minimal/flwindow.cpp | 55 +-- examples/minimal/flwindow.h | 5 + framelesshelper.cpp | 676 +++++++++++++++++++++++++++++++++- framelesshelper.h | 13 + 4 files changed, 723 insertions(+), 26 deletions(-) diff --git a/examples/minimal/flwindow.cpp b/examples/minimal/flwindow.cpp index 44e9346..c98be9e 100644 --- a/examples/minimal/flwindow.cpp +++ b/examples/minimal/flwindow.cpp @@ -10,10 +10,10 @@ FRAMELESSHELPER_USE_NAMESPACE FLWindow::FLWindow(QWidget *parent) : QWidget(parent) { - setWindowFlags(Qt::FramelessWindowHint); - setupUi(); + setWindowFlags(Qt::FramelessWindowHint); + setupUi(); - move(screen()->geometry().center() - frameGeometry().center()); + move(screen()->geometry().center() - frameGeometry().center()); } FLWindow::~FLWindow() @@ -23,14 +23,14 @@ FLWindow::~FLWindow() void FLWindow::initFramelessWindow() { - FramelessHelper* helper = new FramelessHelper(windowHandle()); - helper->setResizeBorderThickness(4); - helper->setTitleBarHeight(m_titleBarWidget->height()); - helper->setResizable(true); - helper->setHitTestVisible(m_minimizeButton); - helper->setHitTestVisible(m_maximizeButton); - helper->setHitTestVisible(m_closeButton); - helper->install(); + m_flsHelper = new FramelessHelper(windowHandle()); + m_flsHelper->setResizeBorderThickness(4); + m_flsHelper->setTitleBarHeight(m_titleBarWidget->height()); + m_flsHelper->setResizable(true); + m_flsHelper->setHitTestVisible(m_minimizeButton); + m_flsHelper->setHitTestVisible(m_maximizeButton); + m_flsHelper->setHitTestVisible(m_closeButton); + m_flsHelper->install(); #ifdef Q_OS_MAC m_minimizeButton->hide(); @@ -47,26 +47,39 @@ void FLWindow::showEvent(QShowEvent *event) static bool inited = false; if (!inited) { inited = true; - initFramelessWindow(); + initFramelessWindow(); } } +#ifdef Q_OS_WIN +bool FLWindow::nativeEvent(const QByteArray &eventType, void *message, long *result) +{ + if (!m_flsHelper) + return QWidget::nativeEvent(eventType, message, result); + + if (m_flsHelper->handleNativeEvent(this->windowHandle(), eventType, message, result)) + return true; + else + return QWidget::nativeEvent(eventType, message, result); +} +#endif // Q_OS_WIN + void FLWindow::setupUi() { - resize(800, 600); + resize(800, 600); - m_titleBarWidget = new QWidget(this); - m_titleBarWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed); - m_titleBarWidget->setFixedHeight(40); - m_titleBarWidget->setStyleSheet(QString::fromLatin1("background:grey")); + m_titleBarWidget = new QWidget(this); + m_titleBarWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed); + m_titleBarWidget->setFixedHeight(40); + m_titleBarWidget->setStyleSheet(QString::fromLatin1("background:grey")); m_minimizeButton = new QPushButton(m_titleBarWidget); - m_minimizeButton->setText(QStringLiteral("Min")); + m_minimizeButton->setText(QStringLiteral("Min")); m_minimizeButton->setObjectName(QStringLiteral("MinimizeButton")); connect(m_minimizeButton, &QPushButton::clicked, this, &QWidget::showMinimized); m_maximizeButton = new QPushButton(m_titleBarWidget); - m_maximizeButton->setText(QStringLiteral("Max")); + m_maximizeButton->setText(QStringLiteral("Max")); m_maximizeButton->setObjectName(QStringLiteral("MaximizeButton")); connect(m_maximizeButton, &QPushButton::clicked, this, [this](){ if (isMaximized() || isFullScreen()) { @@ -77,7 +90,7 @@ void FLWindow::setupUi() }); m_closeButton = new QPushButton(m_titleBarWidget); - m_closeButton->setText(QStringLiteral("Close")); + m_closeButton->setText(QStringLiteral("Close")); m_closeButton->setObjectName(QStringLiteral("CloseButton")); connect(m_closeButton, &QPushButton::clicked, this, &QWidget::close); @@ -88,7 +101,7 @@ void FLWindow::setupUi() titleBarLayout->addWidget(m_minimizeButton); titleBarLayout->addWidget(m_maximizeButton); titleBarLayout->addWidget(m_closeButton); - titleBarLayout->addStretch(); + titleBarLayout->addStretch(); m_titleBarWidget->setLayout(titleBarLayout); const auto mainLayout = new QVBoxLayout(this); diff --git a/examples/minimal/flwindow.h b/examples/minimal/flwindow.h index e4507a8..7d8405b 100644 --- a/examples/minimal/flwindow.h +++ b/examples/minimal/flwindow.h @@ -1,6 +1,7 @@ #pragma once #include +#include "framelesshelper.h" class QPushButton; @@ -13,12 +14,16 @@ public: protected: void showEvent(QShowEvent *event) override; +#ifdef Q_OS_WIN + bool nativeEvent(const QByteArray &eventType, void *message, long *result) override; +#endif // Q_OS_WIN private: void initFramelessWindow(); void setupUi(); private: + __flh_ns::FramelessHelper *m_flsHelper = nullptr; QWidget *m_titleBarWidget = nullptr; QPushButton *m_minimizeButton = nullptr; QPushButton *m_maximizeButton = nullptr; diff --git a/framelesshelper.cpp b/framelesshelper.cpp index 354f1d2..d76d391 100644 --- a/framelesshelper.cpp +++ b/framelesshelper.cpp @@ -28,8 +28,18 @@ #include #include #include +#include +#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0)) +#include +#else +#include +#endif + #include "framelesswindowsmanager.h" #include "utilities.h" +#ifdef Q_OS_WIN +#include "framelesshelper_windows.h" +#endif FRAMELESSHELPER_BEGIN_NAMESPACE @@ -52,24 +62,44 @@ FramelessHelper::FramelessHelper(QWindow *window) */ void FramelessHelper::install() { + if (!QCoreApplication::testAttribute(Qt::AA_DontCreateNativeWidgetSiblings)) { + QCoreApplication::setAttribute(Qt::AA_DontCreateNativeWidgetSiblings); + } + QRect origRect = m_window->geometry(); m_origWindowFlags = m_window->flags(); #ifdef Q_OS_MAC m_window->setFlags(Qt::Window); -#else +#endif // Q_OS_MAC + +#ifdef Q_OS_LINUX m_window->setFlags(m_origWindowFlags | Qt::FramelessWindowHint); -#endif +#endif // Q_OS_LINUX + +#ifdef Q_OS_WIN + // On Windows, Qt::FramelessWindowHint cant not be set. + m_window->setFlags(m_origWindowFlags & ~Qt::FramelessWindowHint); +#endif // Q_OS_WIN m_window->setGeometry(origRect); resizeWindow(origRect.size()); +#ifndef Q_OS_WIN m_window->installEventFilter(this); +#endif #ifdef Q_OS_MAC Utilities::setMacWindowHook(m_window); Utilities::setMacWindowFrameless(m_window); #endif + +#ifdef Q_OS_WIN + updateQtFrameMargins(true); + const WId winId = m_window->winId(); + Utilities::updateFrameMargins(winId, !true); + Utilities::triggerFrameChange(winId); +#endif // Q_OS_WIN } /*! @@ -81,11 +111,20 @@ void FramelessHelper::uninstall() m_origWindowFlags = Qt::WindowFlags(); resizeWindow(QSize()); +#ifndef Q_OS_WIN m_window->removeEventFilter(this); +#endif #ifdef Q_OS_MAC Utilities::unsetMacWindowHook(m_window); #endif + +#ifdef Q_OS_WIN + updateQtFrameMargins(false); + const WId winId = m_window->winId(); + Utilities::updateFrameMargins(winId, !false); + Utilities::triggerFrameChange(winId); +#endif // Q_OS_WIN } /*! @@ -371,14 +410,36 @@ bool FramelessHelper::isHitTestVisible(QObject *obj) return m_HTVObjects.contains(obj); } +/*! + Get position and area of hit test visible widget relative to top-level window. + */ QRect FramelessHelper::getHTVObjectRect(QObject *obj) { - const QPoint originPoint = m_window->mapFromGlobal( - Utilities::mapOriginPointToWindow(obj).toPoint()); + if (!obj) { + return {}; + } + + if (!obj->isWidgetType() && !obj->inherits("QQuickItem")) { + qWarning() << obj << "is not a QWidget or a QQuickItem."; + return {}; + } + + // Get local position of descendant widget relative to top-level window, + QPointF localPos = {obj->property("x").toReal(), obj->property("y").toReal()}; + for (QObject *p = obj->parent(); p; p = p->parent()) { + // If parent is nullptr, the QWidget is a window. + if (p->parent() == nullptr) + break; + // Top-level window of QQuickItem is a QWindow. + if (p->isWindowType()) + break; + localPos += {p->property("x").toReal(), p->property("y").toReal()}; + } + const int width = obj->property("width").toInt(); const int height = obj->property("height").toInt(); - return QRect(originPoint, QSize(width, height)); + return QRect(localPos.toPoint(), QSize(width, height)); } bool FramelessHelper::eventFilter(QObject *object, QEvent *event) @@ -509,4 +570,609 @@ void FramelessHelper::handleResizeHandlerDblClicked() } } +#ifdef Q_OS_WIN +static inline bool shouldHaveWindowFrame() +{ + if (Utilities::shouldUseNativeTitleBar()) { + // We have to use the original window frame unconditionally if we + // want to use the native title bar. + return true; + } + const bool should = qEnvironmentVariableIsSet(Constants::kPreserveNativeFrameFlag); + const bool force = qEnvironmentVariableIsSet(Constants::kForcePreserveNativeFrameFlag); + if (should || force) { + if (force) { + return true; + } + if (should) { + // If you preserve the window frame on Win7~8.1, + // the window will have a terrible appearance. + return Utilities::isWin10OrGreater(); + } + } + return false; +} + +Q_DECLARE_METATYPE(QMargins) +void FramelessHelper::updateQtFrameMargins(const bool enable) +{ + const bool useCustomFrameMargin = (enable && (m_window->windowState() != Qt::WindowMaximized) + && (m_window->windowState() != Qt::WindowFullScreen)); + const int resizeBorderThickness = useCustomFrameMargin ? this->resizeBorderThickness() : 0; + const int titleBarHeight = enable ? this->titleBarHeight() : 0; + const QMargins margins = {-resizeBorderThickness, -titleBarHeight, -resizeBorderThickness, -resizeBorderThickness}; // left, top, right, bottom + const QVariant marginsVar = QVariant::fromValue(margins); + m_window->setProperty("_q_windowsCustomMargins", marginsVar); +#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0)) + QPlatformWindow *platformWindow = m_window->handle(); + if (platformWindow) { + QGuiApplication::platformNativeInterface()->setWindowProperty(platformWindow, QStringLiteral("WindowsCustomMargins"), marginsVar); + } else { + qWarning() << "Failed to retrieve the platform window."; + } +#else + auto *platformWindow = dynamic_cast( + m_window->handle()); + if (platformWindow) { + platformWindow->setCustomMargins(margins); + } else { + qWarning() << "Failed to retrieve the platform window."; + } +#endif +} + +/*! + This function works like a eventFilter, return \c true means the event has been handled. + */ +#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)) +bool FramelessHelper::handleNativeEvent(QWindow *window, const QByteArray &eventType, void *message, qintptr *result) +#else +bool FramelessHelper::handleNativeEvent(QWindow *window, const QByteArray &eventType, void *message, long *result) +#endif +{ + if ((eventType != QByteArrayLiteral("windows_generic_MSG")) || !message || !result) { + return false; + } + +#if (QT_VERSION == QT_VERSION_CHECK(5, 11, 1)) + // Work-around a bug caused by typo which only exists in Qt 5.11.1 + const auto msg = *reinterpret_cast(message); +#else + const auto msg = static_cast(message); +#endif + + if (!msg->hwnd) { + // Why sometimes the window handle is null? Is it designed to be? + // Anyway, we should skip it in this case. + return false; + } + + if (!window) + return false; + + // 所有从 Qt 获得的值必须乘以放大倍速，所有传给 Qt 的值必须除以放大倍数。 + // TODO: 全屏情况下 hitTestVisible 区域的计算有问题。很可能是全屏时，边框剪切造成的按钮位置偏移。 + qreal scaleFactor = m_window->screen()->devicePixelRatio(); + + switch (msg->message) { + case WM_NCCALCSIZE: { + // Windows是根据这个消息的返回值来设置窗口的客户区（窗口中真正显示的内容） + // 和非客户区（标题栏、窗口边框、菜单栏和状态栏等Windows系统自行提供的部分 + // ，不过对于Qt来说，除了标题栏和窗口边框，非客户区基本也都是自绘的）的范 + // 围的，lParam里存放的就是新客户区的几何区域，默认是整个窗口的大小，正常 + // 的程序需要修改这个参数，告知系统窗口的客户区和非客户区的范围（一般来说可 + // 以完全交给Windows，让其自行处理，使用默认的客户区和非客户区），因此如果 + // 我们不修改lParam，就可以使客户区充满整个窗口，从而去掉标题栏和窗口边框 + // （因为这些东西都被客户区给盖住了。但边框阴影也会因此而丢失，不过我们会使 + // 用其他方式将其带回，请参考其他消息的处理，此处不过多提及）。但有个情况要 + // 特别注意，那就是窗口最大化后，窗口的实际尺寸会比屏幕的尺寸大一点，从而使 + // 用户看不到窗口的边界，这样用户就不能在窗口最大化后调整窗口的大小了（虽然 + // 这个做法听起来特别奇怪，但Windows确实就是这样做的），因此如果我们要自行 + // 处理窗口的非客户区，就要在窗口最大化后，将窗口边框的宽度和高度（一般是相 + // 等的）从客户区裁剪掉，否则我们窗口所显示的内容就会超出屏幕边界，显示不全。 + // 如果用户开启了任务栏自动隐藏，在窗口最大化后，还要考虑任务栏的位置。因为 + // 如果窗口最大化后，其尺寸和屏幕尺寸相等（因为任务栏隐藏了，所以窗口最大化 + // 后其实是充满了整个屏幕，变相的全屏了），Windows会认为窗口已经进入全屏的 + // 状态，从而导致自动隐藏的任务栏无法弹出。要避免这个状况，就要使窗口的尺寸 + // 小于屏幕尺寸。我下面的做法参考了火狐、Chromium和Windows Terminal + // 如果没有开启任务栏自动隐藏，是不存在这个问题的，所以要先进行判断。 + // 一般情况下，*result设置为0（相当于DefWindowProc的返回值为0）就可以了， + // 根据MSDN的说法，返回0意为此消息已经被程序自行处理了，让Windows跳过此消 + // 息，否则Windows会添加对此消息的默认处理，对于当前这个消息而言，就意味着 + // 标题栏和窗口边框又会回来，这当然不是我们想要的结果。根据MSDN，当wParam + // 为FALSE时，只能返回0，但当其为TRUE时，可以返回0，也可以返回一个WVR_常 + // 量。根据Chromium的注释，当存在非客户区时，如果返回WVR_REDRAW会导致子 + // 窗口/子控件出现奇怪的bug（自绘控件错位），并且Lucas在Windows 10 + // 上成功复现，说明这个bug至今都没有解决。我查阅了大量资料，发现唯一的解决 + // 方案就是返回0。但如果不存在非客户区，且wParam为TRUE，最好返回 + // WVR_REDRAW，否则窗口在调整大小可能会产生严重的闪烁现象。 + // 虽然对大多数消息来说，返回0都代表让Windows忽略此消息，但实际上不同消息 + // 能接受的返回值是不一样的，请注意自行查阅MSDN。 + + // Sent when the size and position of a window's client area must be + // calculated. By processing this message, an application can + // control the content of the window's client area when the size or + // position of the window changes. If wParam is TRUE, lParam points + // to an NCCALCSIZE_PARAMS structure that contains information an + // application can use to calculate the new size and position of the + // client rectangle. If wParam is FALSE, lParam points to a RECT + // structure. On entry, the structure contains the proposed window + // rectangle for the window. On exit, the structure should contain + // the screen coordinates of the corresponding window client area. + // The client area is the window's content area, the non-client area + // is the area which is provided by the system, such as the title + // bar, the four window borders, the frame shadow, the menu bar, the + // status bar, the scroll bar, etc. But for Qt, it draws most of the + // window area (client + non-client) itself. We now know that the + // title bar and the window frame is in the non-client area and we + // can set the scope of the client area in this message, so we can + // remove the title bar and the window frame by let the non-client + // area be covered by the client area (because we can't really get + // rid of the non-client area, it will always be there, all we can + // do is to hide it) , which means we should let the client area's + // size the same with the whole window's size. So there is no room + // for the non-client area and then the user won't be able to see it + // again. But how to achieve this? Very easy, just leave lParam (the + // re-calculated client area) untouched. But of course you can + // modify lParam, then the non-client area will be seen and the + // window borders and the window frame will show up. However, things + // are quite different when you try to modify the top margin of the + // client area. DWM will always draw the whole title bar no matter + // what margin value you set for the top, unless you don't modify it + // and remove the whole top area (the title bar + the one pixel + // height window border). This can be confirmed in Windows + // Terminal's source code, you can also try yourself to verify + // it. So things will become quite complicated if you want to + // preserve the four window borders. So we just remove the whole + // window frame, otherwise the code will become much more complex. + + if (Utilities::shouldUseNativeTitleBar()) { + break; + } + + if (msg->wParam == FALSE) { + *result = 0; + return true; + } + + const auto clientRect = &(reinterpret_cast(msg->lParam)->rgrc[0]); + + resizeWindow(QSize( + qRound((clientRect->right - clientRect->left) / scaleFactor), + qRound((clientRect->bottom - clientRect->top) / scaleFactor) + )); + + if (shouldHaveWindowFrame()) { + // Store the original top before the default window proc + // applies the default frame. + const LONG originalTop = clientRect->top; + // Apply the default frame + const LRESULT ret = DefWindowProcW(msg->hwnd, WM_NCCALCSIZE, TRUE, msg->lParam); + if (ret != 0) { + *result = ret; + return true; + } + // Re-apply the original top from before the size of the + // default frame was applied. + clientRect->top = originalTop; + } + bool nonClientAreaExists = false; + // We don't need this correction when we're fullscreen. We will + // have the WS_POPUP size, so we don't have to worry about + // borders, and the default frame will be fine. + if (IsMaximized(msg->hwnd) && (window->windowState() != Qt::WindowFullScreen)) { + // 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 of 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 int resizeBorderThickness = qRound(this->resizeBorderThickness() * scaleFactor); + clientRect->top += resizeBorderThickness; + if (!shouldHaveWindowFrame()) { + clientRect->bottom -= resizeBorderThickness; + clientRect->left += resizeBorderThickness; + clientRect->right -= resizeBorderThickness; + } + nonClientAreaExists = true; + } + // Attempt to detect if there's an autohide taskbar, and if + // there is, reduce our size a bit on the side with the taskbar, + // so the user can still mouse-over the taskbar to reveal it. + // Make sure to use MONITOR_DEFAULTTONEAREST, so that this will + // still find the right monitor even when we're restoring from + // minimized. + if (IsMaximized(msg->hwnd) || (window->windowState() == Qt::WindowFullScreen)) { + APPBARDATA abd; + SecureZeroMemory(&abd, sizeof(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 only exists from Win8.1, + // we have to use another way to judge this if we are + // running on Windows 7 or Windows 8. + if (Utilities::isWin8Point1OrGreater()) { + MONITORINFO monitorInfo; + SecureZeroMemory(&monitorInfo, sizeof(monitorInfo)); + monitorInfo.cbSize = sizeof(monitorInfo); + const HMONITOR monitor = MonitorFromWindow(msg->hwnd, MONITOR_DEFAULTTONEAREST); + if (!monitor) { + qWarning() << Utilities::getSystemErrorMessage(QStringLiteral("MonitorFromWindow")); + break; + } + if (GetMonitorInfoW(monitor, &monitorInfo) == FALSE) { + qWarning() << Utilities::getSystemErrorMessage(QStringLiteral("GetMonitorInfoW")); + break; + } + // This helper can be used to determine if there's a + // auto-hide taskbar on the given edge of the monitor + // we're currently on. + const auto hasAutohideTaskbar = [&monitorInfo](const UINT edge) -> bool { + APPBARDATA _abd; + SecureZeroMemory(&_abd, sizeof(_abd)); + _abd.cbSize = sizeof(_abd); + _abd.uEdge = edge; + _abd.rc = monitorInfo.rcMonitor; + const auto hTaskbar = reinterpret_cast(SHAppBarMessage(ABM_GETAUTOHIDEBAREX, &_abd)); + return (hTaskbar != nullptr); + }; + top = hasAutohideTaskbar(ABE_TOP); + bottom = hasAutohideTaskbar(ABE_BOTTOM); + left = hasAutohideTaskbar(ABE_LEFT); + right = hasAutohideTaskbar(ABE_RIGHT); + } else { + // The following code is copied from Mozilla Firefox, + // with some modifications. + int edge = -1; + APPBARDATA _abd; + SecureZeroMemory(&_abd, sizeof(_abd)); + _abd.cbSize = sizeof(_abd); + _abd.hWnd = FindWindowW(L"Shell_TrayWnd", nullptr); + if (_abd.hWnd) { + const HMONITOR windowMonitor = MonitorFromWindow(msg->hwnd, MONITOR_DEFAULTTONEAREST); + if (!windowMonitor) { + qWarning() << Utilities::getSystemErrorMessage(QStringLiteral("MonitorFromWindow")); + break; + } + const HMONITOR taskbarMonitor = MonitorFromWindow(_abd.hWnd, MONITOR_DEFAULTTOPRIMARY); + if (!taskbarMonitor) { + qWarning() << Utilities::getSystemErrorMessage(QStringLiteral("MonitorFromWindow")); + break; + } + if (taskbarMonitor == windowMonitor) { + SHAppBarMessage(ABM_GETTASKBARPOS, &_abd); + edge = _abd.uEdge; + } + } else { + qWarning() << "Failed to retrieve the task bar window handle."; + break; + } + 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; + nonClientAreaExists = true; + } else if (bottom) { + clientRect->bottom -= kAutoHideTaskbarThickness; + nonClientAreaExists = true; + } else if (left) { + clientRect->left += kAutoHideTaskbarThickness; + nonClientAreaExists = true; + } else if (right) { + clientRect->right -= kAutoHideTaskbarThickness; + nonClientAreaExists = true; + } + } + } +#if 0 + // Fix the flickering issue while resizing. + // "clientRect->right += 1;" also works. + // This small technique is known to have two draw backs: + // (1) Qt's coordinate system will be confused because the canvas size + // doesn't match the client area size so you will get some warnings + // from Qt and you should also be careful when you try to draw something + // manually through QPainter or in Qt Quick, be aware of the coordinate + // mismatch issue when you calculate position yourself. + // (2) Qt's window system will take some wrong actions when the window + // is being resized. For example, the window size will become 1px smaller + // or bigger everytime when resize() is called because the client area size + // is not correct. It confuses QPA's internal logic. + clientRect->bottom += 1; +#endif + // If the window bounds change, we're going to relayout and repaint + // anyway. Returning WVR_REDRAW avoids an extra paint before that of + // the old client pixels in the (now wrong) location, and thus makes + // actions like resizing a window from the left edge look slightly + // less broken. + // + // We cannot return WVR_REDRAW when there is nonclient area, or + // Windows exhibits bugs where client pixels and child HWNDs are + // mispositioned by the width/height of the upper-left nonclient + // area. + *result = nonClientAreaExists ? 0 : WVR_REDRAW; + return true; + } + // These undocumented messages are sent to draw themed window + // borders. Block them to prevent drawing borders over the client + // area. + case WM_NCUAHDRAWCAPTION: + case WM_NCUAHDRAWFRAME: { + if (shouldHaveWindowFrame()) { + break; + } else { + *result = 0; + return true; + } + } + case WM_NCPAINT: { + // 边框阴影处于非客户区的范围，因此如果直接阻止非客户区的绘制，会导致边框阴影丢失 + + if (!Utilities::isDwmCompositionAvailable() && !shouldHaveWindowFrame()) { + // Only block WM_NCPAINT when DWM composition is disabled. If + // it's blocked when DWM composition is enabled, the frame + // shadow won't be drawn. + *result = 0; + return true; + } else { + break; + } + } + case WM_NCACTIVATE: { + if (shouldHaveWindowFrame()) { + break; + } else { + if (Utilities::isDwmCompositionAvailable()) { + // DefWindowProc won't repaint the window border if lParam + // (normally a HRGN) is -1. See the following link's "lParam" + // section: + // https://docs.microsoft.com/en-us/windows/win32/winmsg/wm-ncactivate + // Don't use "*result = 0" otherwise the window won't respond + // to the window active state change. + *result = DefWindowProcW(msg->hwnd, WM_NCACTIVATE, msg->wParam, -1); + } else { + if (msg->wParam == FALSE) { + *result = TRUE; + } else { + *result = FALSE; + } + } + return true; + } + } + case WM_NCHITTEST: { + // 原生Win32窗口只有顶边是在窗口内部resize的，其余三边都是在窗口 + // 外部进行resize的，其原理是，WS_THICKFRAME这个窗口样式会在窗 + // 口的左、右和底边添加三个透明的resize区域，这三个区域在正常状态 + // 下是完全不可见的，它们由DWM负责绘制和控制。这些区域的宽度等于 + // (SM_CXSIZEFRAME + SM_CXPADDEDBORDER)，高度等于 + // (SM_CYSIZEFRAME + SM_CXPADDEDBORDER)，在100%缩放时，均等 + // 于8像素。它们属于窗口区域的一部分，但不属于客户区，而是属于非客 + // 户区，因此GetWindowRect获取的区域中是包含这三个resize区域的， + // 而GetClientRect获取的区域是不包含它们的。当把 + // DWMWA_EXTENDED_FRAME_BOUNDS作为参数调用 + // DwmGetWindowAttribute时，也能获取到一个窗口大小，这个大小介 + // 于前面两者之间，暂时不知道这个数据的意义及其作用。我们在 + // WM_NCCALCSIZE消息的处理中，已经把整个窗口都设置为客户区了，也 + // 就是说，我们的窗口已经没有非客户区了，因此那三个透明的resize区 + // 域，此刻也已经成为窗口客户区的一部分了，从而变得不透明了。所以 + // 现在的resize，看起来像是在窗口内部resize，是因为原本透明的地方 + // 现在变得不透明了，实际上，单纯从范围上来看，现在我们resize的地方， + // 就是普通窗口的边框外部，那三个透明区域的范围。 + // 因此，如果我们把边框完全去掉（就是我们正在做的事情），resize就 + // 会看起来是在内部进行，这个问题通过常规方法非常难以解决。我测试过 + // QQ和钉钉的窗口，它们的窗口就是在外部resize，但实际上它们是通过 + // 把窗口实际的内容，嵌入到一个完全透明的但尺寸要大一圈的窗口中实现 + // 的，虽然看起来效果还行，但在我看来不是正途。而且我之所以能发现， + // 也是由于这种方法在很多情况下会露馅，比如窗口未响应卡住或贴边的时 + // 候，能明显看到窗口周围多出来一圈边界。我曾经尝试再把那三个区域弄 + // 透明，但无一例外都会破坏DWM绘制的边框阴影，因此只好作罢。 + + // As you may have found, if you use this code, the resize areas + // will be inside the frameless window, however, a normal Win32 + // window can be resized outside of it. Here is the reason: the + // WS_THICKFRAME window style will cause a window has three + // transparent areas beside the window's left, right and bottom + // edge. Their width or height is eight pixels if the window is not + // scaled. In most cases, they are totally invisible. It's DWM's + // responsibility to draw and control them. They exist to let the + // user resize the window, visually outside of it. They are in the + // window area, but not the client area, so they are in the + // non-client area actually. But we have turned the whole window + // area into client area in WM_NCCALCSIZE, so the three transparent + // resize areas also become a part of the client area and thus they + // become visible. When we resize the window, it looks like we are + // resizing inside of it, however, that's because the transparent + // resize areas are visible now, we ARE resizing outside of the + // window actually. But I don't know how to make them become + // transparent again without breaking the frame shadow drawn by DWM. + // If you really want to solve it, you can try to embed your window + // into a larger transparent window and draw the frame shadow + // yourself. As what we have said in WM_NCCALCSIZE, you can only + // remove the top area of the window, this will let us be able to + // resize outside of the window and don't need much process in this + // message, it looks like a perfect plan, however, the top border is + // missing due to the whole top area is removed, and it's very hard + // to bring it back because we have to use a trick in WM_PAINT + // (learned from Windows Terminal), but no matter what we do in + // WM_PAINT, it will always break the backing store mechanism of Qt, + // so actually we can't do it. And it's very difficult to do such + // things in NativeEventFilters as well. What's worse, if we really + // do this, the four window borders will become white and they look + // horrible in dark mode. This solution only supports Windows 10 + // because the border width on Win10 is only one pixel, however it's + // eight pixels on Windows 7 so preserving the three window borders + // looks terrible on old systems. I'm testing this solution in + // another branch, if you are interested in it, you can give it a + // try. + + if (Utilities::shouldUseNativeTitleBar()) { + break; + } + + POINT winLocalMouse = {GET_X_LPARAM(msg->lParam), GET_Y_LPARAM(msg->lParam)}; + if (ScreenToClient(msg->hwnd, &winLocalMouse) == FALSE) { + qWarning() << Utilities::getSystemErrorMessage(QStringLiteral("ScreenToClient")); + break; + } + const QPointF localMouse = {static_cast(winLocalMouse.x), static_cast(winLocalMouse.y)}; + RECT clientRect = {0, 0, 0, 0}; + if (GetClientRect(msg->hwnd, &clientRect) == FALSE) { + qWarning() << Utilities::getSystemErrorMessage(QStringLiteral("GetClientRect")); + break; + } + const LONG windowWidth = clientRect.right; + const int resizeBorderThickness = qRound(this->resizeBorderThickness() * scaleFactor); + const int titleBarHeight = qRound(this->titleBarHeight() * scaleFactor); + + bool isTitleBar = isInTitlebarArea(QPoint(qRound(localMouse.x() / scaleFactor), qRound(localMouse.y() / scaleFactor))); + + /* + if (IsMaximized(msg->hwnd) || (window->windowState() == Qt::WindowFullScreen)) { + isTitleBar = (localMouse.y() >= 0) && (localMouse.y() <= titleBarHeight) + && (localMouse.x() >= 0) && (localMouse.x() <= windowWidth) + && !Utilities::isHitTestVisibleInChrome(window); + } + if (window->windowState() == Qt::WindowNoState) { + isTitleBar = (localMouse.y() > resizeBorderThickness) && (localMouse.y() <= titleBarHeight) + && (localMouse.x() > resizeBorderThickness) && (localMouse.x() < (windowWidth - resizeBorderThickness)) + && !Utilities::isHitTestVisibleInChrome(window); + } + */ + + const bool isTop = localMouse.y() <= resizeBorderThickness; + if (shouldHaveWindowFrame()) { + // This will handle the left, right and bottom parts of the frame + // because we didn't change them. + const LRESULT originalRet = DefWindowProcW(msg->hwnd, WM_NCHITTEST, 0, msg->lParam); + if (originalRet != HTCLIENT) { + *result = originalRet; + 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 (!IsMaximized(msg->hwnd) && isTop) { + *result = HTTOP; + return true; + } + if (isTitleBar) { + *result = HTCAPTION; + return true; + } + *result = HTCLIENT; + return true; + } else { + const LRESULT hitTestResult = [ + clientRect, msg, isTitleBar, &localMouse, + resizeBorderThickness, windowWidth, isTop, + window, scaleFactor] { + if (IsMaximized(msg->hwnd)) { + if (isTitleBar) { + return HTCAPTION; + } + return HTCLIENT; + } + const LONG windowHeight = clientRect.bottom; + const bool isBottom = (localMouse.y() >= (windowHeight - resizeBorderThickness)); + // Make the border a little wider to let the user easy to resize on corners. + const qreal factor = (isTop || isBottom) ? 2.0 : 1.0; + const bool isLeft = (localMouse.x() <= qRound(static_cast(resizeBorderThickness) * factor)); + const bool isRight = (localMouse.x() >= (windowWidth - qRound(static_cast(resizeBorderThickness) * factor))); + const bool fixedSize = Utilities::isWindowFixedSize(window); + const auto getBorderValue = [fixedSize](int value) -> int { + return fixedSize ? HTCLIENT : value; + }; + if (isTop) { + if (isLeft) { + return getBorderValue(HTTOPLEFT); + } + if (isRight) { + return getBorderValue(HTTOPRIGHT); + } + return getBorderValue(HTTOP); + } + if (isBottom) { + if (isLeft) { + return getBorderValue(HTBOTTOMLEFT); + } + if (isRight) { + return getBorderValue(HTBOTTOMRIGHT); + } + return getBorderValue(HTBOTTOM); + } + if (isLeft) { + return getBorderValue(HTLEFT); + } + if (isRight) { + return getBorderValue(HTRIGHT); + } + if (isTitleBar) { + return HTCAPTION; + } + return HTCLIENT; + }(); + *result = hitTestResult; + return true; + } + } + case WM_SETICON: + case WM_SETTEXT: { + if (Utilities::shouldUseNativeTitleBar()) { + break; + } + + // Disable painting while these messages are handled to prevent them + // from drawing a window caption over the client area. + const LONG_PTR oldStyle = GetWindowLongPtrW(msg->hwnd, GWL_STYLE); + // Prevent Windows from drawing the default title bar by temporarily + // toggling the WS_VISIBLE style. + if (SetWindowLongPtrW(msg->hwnd, GWL_STYLE, static_cast(oldStyle & ~WS_VISIBLE)) == 0) { + qWarning() << Utilities::getSystemErrorMessage(QStringLiteral("SetWindowLongPtrW")); + break; + } + const auto winId = reinterpret_cast(msg->hwnd); + Utilities::triggerFrameChange(winId); + const LRESULT ret = DefWindowProcW(msg->hwnd, msg->message, msg->wParam, msg->lParam); + if (SetWindowLongPtrW(msg->hwnd, GWL_STYLE, oldStyle) == 0) { + qWarning() << Utilities::getSystemErrorMessage(QStringLiteral("SetWindowLongPtrW")); + break; + } + Utilities::triggerFrameChange(winId); + *result = ret; + return true; + } + case WM_SIZE: { + const bool normal = (msg->wParam == SIZE_RESTORED); + const bool max = (msg->wParam == SIZE_MAXIMIZED); + const bool full = (window->windowState() == Qt::WindowFullScreen); + if (normal || max || full) { + Utilities::updateFrameMargins(reinterpret_cast(msg->hwnd), (max || full)); + updateQtFrameMargins(true); + } + } break; + default: + break; + } + return false; +} +#endif // Q_OS_WIN + FRAMELESSHELPER_END_NAMESPACE diff --git a/framelesshelper.h b/framelesshelper.h index 771827e..3d2638d 100644 --- a/framelesshelper.h +++ b/framelesshelper.h @@ -89,6 +89,19 @@ public: bool isHitTestVisible(QObject *obj); QRect getHTVObjectRect(QObject *obj); +#ifdef Q_OS_WIN +#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)) + bool handleNativeEvent(QWindow *window, const QByteArray &eventType, void *message, qintptr *result); +#else + bool handleNativeEvent(QWindow *window, const QByteArray &eventType, void *message, long *result); +#endif +#endif // Q_OS_WIN + +private: +#ifdef Q_OS_WIN + void updateQtFrameMargins(const bool enable); +#endif // Q_OS_WIN + protected: bool eventFilter(QObject *object, QEvent *event) override; void handleResizeHandlerDblClicked();