[Development] Windows plugin customisation: QWindowsKeyMapper

[Laszlo Papp]

I actually also tried this to no avail. Is it a Windows plugin or native
event filter bug that I cannot intercept alt+key presses? Or am I doing
something wrong?

#include <QAbstractNativeEventFilter>

#include <QApplication>

#include <QMainWindow>

#include <iostream>

#ifdef Q_OS_WIN
#include <windows.h>
#endif

class MyMSGEventFilter : public QAbstractNativeEventFilter
{
public:
    bool nativeEventFilter(const QByteArray &eventType, [[maybe_unused]]
void *message, long *) override
    {
#ifdef Q_OS_WIN
        if (eventType == "windows_generic_MSG"
            || eventType == "windows_dispatcher_MSG") {
            MSG *msg = static_cast<MSG *>(message);
            // This works
            if (msg->wParam == VK_SPACE) {
               std::cout << "TEST SPACE" << std::endl;
            }
            // None of these work.
            // else if (msg->wParam == WM_SYSKEYDOWN) {
            // else if (msg->wParam == VK_MENU) {
            else if (msg->wParam == VK_LMENU) {
               std::cout << "TEST ALT" << std::endl;
            }
        }
#endif
        return false;
    }
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    MyMSGEventFilter filterObject;
    app.installNativeEventFilter(&filterObject);
    QMainWindow mainWindow;
    mainWindow.show();
    return app.exec();
}
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