// touch_simulator.h#pragma once#include<QWidget>#include<QSerialPort>class TouchSimulator : public QWidget {    Q_OBJECTpublic:    explicitTouchSimulator(QWidget *parent = nullptr);private slots:    voidonSerialDataReady();private:    voidsimulateClick(int x, int y);    QSerialPort m_serial;};

// touch_simulator.cpp#include"touch_simulator.h"#include<QApplication>#include<QMouseEvent>#include<QDebug>TouchSimulator::TouchSimulator(QWidget *parent)    : QWidget(parent){    // 全屏显示（eglfs/linuxfb 常见配置）    showFullScreen();    // 初始化串口（根据实际设备修改）    m_serial.setPortName("ttyS2");    m_serial.setBaudRate(QSerialPort::Baud115200);    if (m_serial.open(QIODevice::ReadOnly)) {        connect(&m_serial, &QSerialPort::readyRead, this, &TouchSimulator::onSerialDataReady);    }}voidTouchSimulator::onSerialDataReady(){    QByteArray data = m_serial.readAll();    qDebug() << "Raw data:" << data;    // 协议示例: "TCH:320,240\n"    if (data.startsWith("TCH:")) {        QString line = QString::fromLatin1(data).trimmed();        QStringList parts = line.mid(4).split(',');        if (parts.size() == 2) {            bool ok1, ok2;            int x = parts[0].toInt(&ok1);            int y = parts[1].toInt(&ok2);            if (ok1 && ok2) {                simulateClick(x, y);            }        }    }}voidTouchSimulator::simulateClick(int x, int y){    // 在 eglfs/linuxfb 全屏模式下，x/y 即为窗口局部坐标    QPoint pos(x, y);    // 鼠标按下    QMouseEvent press(QEvent::MouseButtonPress, pos, Qt::LeftButton,                      Qt::LeftButton, Qt::NoModifier);    QApplication::sendEvent(this, &press);    // 鼠标释放（形成一次点击）    QMouseEvent release(QEvent::MouseButtonRelease, pos, Qt::LeftButton,                        Qt::LeftButton, Qt::NoModifier);    QApplication::sendEvent(this, &release);}

// 启用触摸事件setFocusPolicy(Qt::StrongFocus);setAttribute(Qt::WA_AcceptTouchEvents);// 发送触摸事件voidsendTouchEvent(int x, int y){    static int id = 0;    QTouchEvent::TouchPoint point;    point.setId(id++);    point.setPos(QPointF(x, y));    point.setPressure(1.0);    QList<QTouchEvent::TouchPoint> points{point};    QTouchEvent begin(QEvent::TouchBegin, nullptr, Qt::NoModifier, points);    QTouchEvent end(QEvent::TouchEnd, nullptr, Qt::NoModifier, {});    QApplication::sendEvent(this, &begin);    QApplication::sendEvent(this, &end);}

#include<linux/uinput.h>#include<fcntl.h>#include<unistd.h>int fd = open("/dev/uinput", O_WRONLY | O_NONBLOCK);ioctl(fd, UI_SET_EVBIT, EV_KEY);ioctl(fd, UI_SET_KEYBIT, BTN_TOUCH);ioctl(fd, UI_SET_EVBIT, EV_ABS);ioctl(fd, UI_SET_ABSBIT, ABS_X);ioctl(fd, UI_SET_ABSBIT, ABS_Y);struct uinput_setup usetup = {};usetup.id.bustype = BUS_USB;strcpy(usetup.name, "Virtual Touchscreen");usetup.absinfo[0].maximum = 800; // 屏幕宽度usetup.absinfo[1].maximum = 480; // 屏幕高度ioctl(fd, UI_DEV_SETUP, &usetup);ioctl(fd, UI_DEV_CREATE);// 发送坐标write_event(fd, EV_ABS, ABS_X, x);write_event(fd, EV_ABS, ABS_Y, y);write_event(fd, EV_KEY, BTN_TOUCH, 1); // 按下write_event(fd, EV_SYN, SYN_REPORT, 0);// ... 释放

float scaleX = static_cast<float>(width()) / externalMaxX;float scaleY = static_cast<float>(height()) / externalMaxY;int qtX = x * scaleX;int qtY = y * scaleY;

if (m_lastPos == pos && !m_hasReleased) return;