linux qt软键盘代码

#include <QApplication>
#include <QWidget>
#include <QPushButton>
#include <QVBoxLayout>
#include <QSignalMapper>

class SoftKeyboard : public QWidget {
    Q_OBJECT

public:
    SoftKeyboard(QWidget *parent = nullptr) : QWidget(parent) {
        QVBoxLayout *layout = new QVBoxLayout(this);

        QStringList keys = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "Space", "Backspace"};
        QSignalMapper *mapper = new QSignalMapper(this);

        for (const QString &key : keys) {
            QPushButton *button = new QPushButton(key, this);
            layout->addWidget(button);
            connect(button, SIGNAL(clicked()), mapper, SLOT(map()));
            mapper->setMapping(button, key);
        }

        connect(mapper, SIGNAL(mapped(QString)), this, SLOT(onKeyClicked(QString)));

        setLayout(layout);
    }

signals:
    void keyClicked(const QString &key);

private slots:
    void onKeyClicked(const QString &key) {
        if (key == "Backspace") {
            emit keyClicked("\b");
        } else if (key == "Space") {
            emit keyClicked(" ");
        } else {
            emit keyClicked(key);
        }
    }
};

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

    SoftKeyboard keyboard;
    QObject::connect(&keyboard, &SoftKeyboard::keyClicked, [&](const QString &key) {
        qDebug() << "Key clicked:" << key;
    });
    keyboard.show();

    return app.exec();
}

#include "main.moc"