linux qt小游戏代码

#include <QApplication>
#include <QWidget>
#include <QPainter>
#include <QTimer>

class GameWidget : public QWidget {
    Q_OBJECT

public:
    GameWidget(QWidget *parent = nullptr) : QWidget(parent), x(50), y(50), dx(2), dy(2) {
        QTimer *timer = new QTimer(this);
        connect(timer, &QTimer::timeout, this, QOverload<>::of(&GameWidget::updateGame));
        timer->start(16); // ~60 FPS
    }

protected:
    void paintEvent(QPaintEvent *) override {
        QPainter painter(this);
        painter.setBrush(Qt::blue);
        painter.drawEllipse(x, y, 20, 20);
    }

private slots:
    void updateGame() {
        x += dx;
        y += dy;

        if (x < 0 || x > width() - 20) dx = -dx;
        if (y < 0 || y > height() - 20) dy = -dy;

        update(); // 触发重绘
    }

private:
    int x, y, dx, dy;
};

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);

    GameWidget gameWidget;
    gameWidget.resize(400, 300);
    gameWidget.show();

    return app.exec();
}

#include "main.moc"