Update.

Signed-off-by: Yuhang Zhao <2546789017@qq.com>

main.cpp

@@ -18,10 +18,8 @@ int main(int argc, char *argv[]) {
 
     QApplication application(argc, argv);
 
-    WinNativeEventFilter::install();
-
     QWidget widget;
-    WinNativeEventFilter::updateQtFrame(widget.windowHandle());
+    WinNativeEventFilter::addFramelessWindow(&widget);
     widget.show();
 
     return QApplication::exec();

winnativeeventfilter.cpp

@@ -27,8 +27,10 @@
 #include <QDebug>
 #include <QGuiApplication>
 #include <QLibrary>
+#include <QObject>
 #include <QOperatingSystemVersion>
 #include <QVariant>
+#include <QWidget>
 #include <QWindow>
 #include <QtMath>
 #include <d2d1.h>
@@ -926,3 +928,52 @@ void WinNativeEventFilter::setTitlebarHeight(int tbh) {
         m_titlebarHeight = tbh;
     }
 }
+
+void WinNativeEventFilter::setFramelessWindows(QVector<QObject *> windows) {
+    if (!windows.isEmpty()) {
+        for (auto &&window : qAsConst(windows)) {
+            addFramelessWindow(window);
+        }
+    }
+}
+
+void WinNativeEventFilter::addFramelessWindow(QObject *window,
+                                              WINDOWDATA *data) {
+    if (window) {
+        const auto getWindowHandle = [](QWindow *win) -> HWND {
+            if (win && win->handle()) {
+                const auto handle =
+                    QGuiApplication::platformNativeInterface()
+                        ->nativeResourceForWindow("handle", win);
+                if (handle) {
+                    return static_cast<HWND>(handle);
+                }
+            }
+            return reinterpret_cast<HWND>(win->winId());
+        };
+        HWND hwnd = nullptr;
+        if (window->isWidgetType()) {
+            const auto widget = qobject_cast<QWidget *>(window);
+            if (widget) {
+                QWindow *const _window = widget->windowHandle();
+                if (_window) {
+                    hwnd = getWindowHandle(_window);
+                } else {
+                    hwnd = reinterpret_cast<HWND>(widget->winId());
+                }
+            }
+        } else if (window->isWindowType()) {
+            const auto _window = qobject_cast<QWindow *>(window);
+            if (_window) {
+                hwnd = getWindowHandle(_window);
+            }
+        } else {
+            qWarning().noquote() << "Only QWidget and QWindow are accepted.";
+        }
+        if (hwnd) {
+            addFramelessWindow(hwnd, data);
+        } else {
+            qWarning().noquote() << "Failed to acquire window handle.";
+        }
+    }
+}

winnativeeventfilter.h

@@ -30,6 +30,7 @@
 #include <qt_windows.h>
 
 QT_BEGIN_NAMESPACE
+QT_FORWARD_DECLARE_CLASS(QObject)
 QT_FORWARD_DECLARE_CLASS(QWindow)
 QT_END_NAMESPACE
 
@@ -63,9 +64,12 @@ public:
     // Frameless windows handle list
     static QVector<HWND> framelessWindows();
     static void setFramelessWindows(QVector<HWND> windows);
+    static void setFramelessWindows(QVector<QObject *> windows);
     // Make the given window become frameless.
     static void addFramelessWindow(HWND window, WINDOWDATA *data = nullptr);
+    static void addFramelessWindow(QObject *window, WINDOWDATA *data = nullptr);
     static void removeFramelessWindow(HWND window);
+    static void removeFramelessWindow(QObject *window);
     static void clearFramelessWindows();
 
     // Set borderWidth, borderHeight or titlebarHeight to a negative value to