QtKeyLogger

CMakeLists.txt

cmake_minimum_required(VERSION 3.16)
project(QtKeyLogger LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(Qt6 REQUIRED COMPONENTS Widgets)

qt_standard_project_setup()

add_executable(QtKeyLogger
    hotkey.cpp
    hotkey.h
)

set_property(SOURCE hotkey.h PROPERTY SKIP_AUTOMOC OFF)
set_property(SOURCE hotkey.cpp PROPERTY SKIP_AUTOMOC OFF)

target_link_libraries(QtKeyLogger PRIVATE Qt6::Widgets)

hotkey.cpp

#include "hotkey.h"
#include <QApplication>
#include <QWidget>
#include <QVBoxLayout>
#include <QLabel>
#include <QKeyEvent>

KeyPressWidget::KeyPressWidget(QWidget *parent) : QWidget(parent) {
    QVBoxLayout *layout = new QVBoxLayout(this);
    label = new QLabel("Press a key", this);
    layout->addWidget(label);
    setLayout(layout);
    resize(400, 400);
}

KeyPressWidget::~KeyPressWidget() {}

void KeyPressWidget::keyPressEvent(QKeyEvent *event) {
    QString keyText;

    const Qt::KeyboardModifier modifiers[] = {
        Qt::ShiftModifier, Qt::ControlModifier, Qt::AltModifier, Qt::MetaModifier
    };
    const QString modifierNames[] = { "Shift", "Ctrl", "Alt", "Meta" };

    for (int i = 0; i < 4; ++i) {
        if (event->modifiers() & modifiers[i]) {
            keyText += modifierNames[i] + "+";
        }
    }

    keyText += QKeySequence(event->key()).toString(QKeySequence::NativeText);

    label->setText("Key Pressed: " + keyText);
}

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);
    KeyPressWidget window;
    window.show();
    return app.exec();
}

hotkey.h

#ifndef HOTKEY_H
#define HOTKEY_H

#include <QWidget>
#include <QLabel>
#include <QVBoxLayout>
#include <QKeyEvent>

class KeyPressWidget : public QWidget {
    Q_OBJECT

public:
    explicit KeyPressWidget(QWidget *parent = nullptr);
    virtual ~KeyPressWidget(); // Explicitly declare a virtual destructor

protected:
    void keyPressEvent(QKeyEvent *event) override;

private:
    QLabel *label;
};

#endif // HOTKEY_H