qt(windows): don't process raw input events when in menu or other window

src/qt/qt_main.cpp

@@ -107,7 +107,7 @@ int main(int argc, char* argv[]) {
     app.installEventFilter(main_window);
 
 #ifdef Q_OS_WINDOWS
-    auto rawInputFilter = WindowsRawInputFilter::Register();
+    auto rawInputFilter = WindowsRawInputFilter::Register(main_window);
     if (rawInputFilter)
     {
         app.installNativeEventFilter(rawInputFilter.get());

src/qt/qt_winrawinputfilter.cpp

@@ -32,6 +32,8 @@
 
 #include "qt_winrawinputfilter.hpp"
 
+#include <QMenuBar>
+
 #include <Windows.h>
 
 #include <86box/keyboard.h>
@@ -42,34 +44,44 @@
 #include <array>
 #include <memory>
 
-std::unique_ptr<WindowsRawInputFilter> WindowsRawInputFilter::Register()
+std::unique_ptr<WindowsRawInputFilter> WindowsRawInputFilter::Register(QMainWindow *window)
 {
+    HWND wnd = (HWND)window->winId();
+
     RAWINPUTDEVICE rid[2] =
     {
         {
             .usUsagePage = 0x01,
             .usUsage = 0x06,
             .dwFlags = RIDEV_NOHOTKEYS,
-            .hwndTarget = NULL
+            .hwndTarget = wnd
         },
         {
             .usUsagePage = 0x01,
             .usUsage = 0x02,
             .dwFlags = 0,
-            .hwndTarget = NULL
+            .hwndTarget = wnd
         }
     };
 
     if (RegisterRawInputDevices(rid, 2, sizeof(rid[0])) == FALSE)
         return std::unique_ptr<WindowsRawInputFilter>(nullptr);
 
-    std::unique_ptr<WindowsRawInputFilter> inputfilter(new WindowsRawInputFilter());
+    std::unique_ptr<WindowsRawInputFilter> inputfilter(new WindowsRawInputFilter(window));
 
     return inputfilter;
 }
 
-WindowsRawInputFilter::WindowsRawInputFilter()
+WindowsRawInputFilter::WindowsRawInputFilter(QMainWindow *window)
 {
+    this->window = window;
+
+    for (auto menu : window->findChildren<QMenu*>())
+    {
+        connect(menu, &QMenu::aboutToShow, this, [=]() { menus_open++; });
+        connect(menu, &QMenu::aboutToHide, this, [=]() { menus_open--; });
+    }
+
     for (size_t i = 0; i < sizeof(scancode_map) / sizeof(scancode_map[0]); i++)
         scancode_map[i] = i;
 
@@ -105,7 +117,7 @@ bool WindowsRawInputFilter::nativeEventFilter(const QByteArray &eventType, void
 
         if (msg->message == WM_INPUT)
         {
-            //if (infocus) /* TODO: Need way to tell if in menu or settings dialog */
+            if (window->isActiveWindow() && menus_open == 0)
                 handle_input((HRAWINPUT)msg->lParam);
             
             return true;

src/qt/qt_winrawinputfilter.hpp

@@ -32,6 +32,7 @@
 #define QT_WINDOWSRAWINPUTFILTER_HPP
 
 #include <QObject>
+#include <QMainWindow>
 #include <QAbstractNativeEventFilter>
 #include <QByteArray>
 
@@ -44,7 +45,7 @@ class WindowsRawInputFilter : public QObject, public QAbstractNativeEventFilter
     Q_OBJECT
 
 public:
-    static std::unique_ptr<WindowsRawInputFilter> Register();
+    static std::unique_ptr<WindowsRawInputFilter> Register(QMainWindow *window);
 
     bool nativeEventFilter(const QByteArray &eventType, void *message, long *result) override;
 
@@ -54,13 +55,15 @@ public slots:
     void mousePoll();
 
 private:
+    QMainWindow *window;
     uint16_t scancode_map[768];
     int buttons = 0;
 	int dx = 0;
 	int dy = 0;
 	int dwheel = 0;
+    int menus_open = 0;
 
-    WindowsRawInputFilter();
+    WindowsRawInputFilter(QMainWindow *window);
 
     void handle_input(HRAWINPUT input);
     void keyboard_handle(PRAWINPUT raw);