基于QT+C++的智能云监护仪项目，能够实时显示使用者心电、血氧、血压波形及其它各种参数+源码（毕业设计&课程设计&项目开发）

#include "qwidgetdraw.h" #include <QPainter> #include <QTimer> #include <QDebug> int ecgWave[]= { 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2008, 2016, 2016, 2016, 2024, 2032, 2048, 2064, 2064, 2064, 2072, 2080, 2080, 2080, 2088, 2096, 2104, 2112, 2112, 2112, 2112, 2112, 2112, 2104, 2096, 2088, 2080, 2080, 2080, 2072, 2064, 2064, 2064, 2048, 2032, 2032, 2032, 2016, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 1992, 1984, 1976, 1968, 1960, 1952, 1944, 1936, 1944, 1952, 2016, 2080, 2136, 2192, 2256, 2320, 2376, 2432, 2488, 2544, 2568, 2592, 2536, 2480, 2424, 2368, 2304, 2240, 2184, 2128, 2072, 2016, 1968, 1920, 1928, 1936, 1944, 1952, 1960, 1968, 1984, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2008, 2016, 2024, 2032, 2032, 2032, 2048, 2064, 2064, 2064, 2072, 2080, 2088, 2096, 2104, 2112, 2112, 2112, 2120, 2128, 2136, 2144, 2152, 2160, 2160, 2160, 2160, 2160, 2168, 2176, 2176, 2176, 2184, 2192, 2192, 2192, 2192, 2200, 2208, 2208, 2208, 2208, 2208, 2208, 2208, 2200, 2192, 2192, 2192, 2184, 2176, 2176, 2176, 2168, 2160, 2160, 2160, 2144, 2128, 2128, 2128, 2128, 2128, 2112, 2096, 2088, 2080, 2072, 2064, 2064, 2064, 2048, 2032, 2024, 2016, 2016, 2016, 2008, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000, 2000 }; QWidgetDraw::QWidgetDraw(QWidget *parent) : QWidget(parent) { // this->resize(1600,500); this->map = QPixmap(this->width(), this->height()); this->map.fill(Qt::black); this->timer = new QTimer(parent); this->timer->start(10); //单位是毫秒 // connect(timer, &QTimer::timeout, this, &QWidgetDraw::refresh); connect(timer, &QTimer::timeout, this, &QWidgetDraw::sendData); connect(this, &QWidgetDraw::rxDataSignal, this, &QWidgetDraw::refreshFromData); connect(this, &QWidgetDraw::rxDataSignal, this, &QWidgetDraw::testRx); } // event void QWidgetDraw::resizeEvent(QResizeEvent *event) { qDebug()<<"this"<<this->width(); qDebug()<<"this"<<this->height(); // 根据当前尺寸新建画布 QPixmap cleanMap = QPixmap(this->width(), this->height()); cleanMap.fill(Qt::black); // 新建后的画布替换原有画布 this->map = cleanMap; this->x = 0; qDebug()<<this->map.width(); qDebug()<<this->map.height(); } void QWidgetDraw::testRx(int data) { // qDebug()<<"rx:"<<data; } void QWidgetDraw::sendData() { int data = 0; int height = this->height(); data = height - ecgWave[index]*height/4096; this->index += 3; if(this->index >= sizeof(ecgWave)/sizeof(int)) this->index = 0; emit rxDataSignal(data); } void QWidgetDraw::refreshFromData(int data) { // 更新图片缓存 QPainter *painter = new QPainter(); painter->begin(&this->map); //配置画笔 QPen *pen = new QPen(); pen->setWidth(2); pen->setColor(Qt::green); painter->setPen(*pen); // 画图到map（缓存） this->drawWave(painter, data); painter->end(); // 执行update，触发paintevent事件 this->update(); } void QWidgetDraw::refresh() { // 更新图片缓存 QPainter *painter = new QPainter(); painter->begin(&this->map); // 画图到map（缓存） this->draw(painter); painter->end(); // 执行update，触发paintevent事件 this->update(); } // 事件机制 void QWidgetDraw::paintEvent(QPaintEvent *event) { QPainter *painter = new QPainter(); painter->begin(this); // 画图到界面 painter->drawPixmap(0, 0, this->map); painter->end(); } void QWidgetDraw::drawDemo(QPainter *painter) { QPen *pen = new QPen(); //配置画笔 pen->setColor(Qt::green); //存储配置 painter->save(); painter->setPen(*pen); //画图 painter->drawRect(0, 0, 100, 100); // todo 嵌套深度验证 // 重新加载原来配置 painter->restore(); } void QWidgetDraw::draw(QPainter *painter) { //配置画笔 QPen *pen = new QPen(); pen->setWidth(2); pen->setColor(Qt::green); painter->setPen(*pen); // drawTriangleNew(painter); drawWaveFromArray(painter); } void QWidgetDraw::drawTriangleNew(QPainter *painter) { int width = this->width(); int height = this->height(); // 创建画笔 QPen *pen = new QPen(); // 参数配置 pen->setWidth(4); pen->setColor(Qt::black); // 保持配置 painter->save(); // 新的配置 painter->setPen(*pen); // 擦除 painter->drawLine(x, 0, x, height); // 还原配置 painter->restore(); painter->drawPoint(x, height-y); x += 1; if(0 == dir) { y += 1; if(y > height/2) dir = 1; }else { y -= 1; if(0 == y) dir = 0; } if(x >= width) x = 0; } void QWidgetDraw::drawTriangle(QPainter *painter) { int width = this->width(); int height = this->height(); int cnt; int x,y; int dir = 0; x = 0; y = 0; for(cnt = 0; cnt < width; cnt ++) { painter->drawPoint(x, height-y); x += 1; if(0 == dir) { y += 1; if(y > height/2) dir = 1; }else { y -= 1; if(0 == y) dir = 0; } } } void QWidgetDraw::drawWaveFromArray(QPainter *painter) { int data = 0; int height = this->height(); data = height - ecgWave[index]*height/4096; this->drawWave(painter, data); this->index += 3; if(this->index >= sizeof(ecgWave)/sizeof(int)) this->index = 0; } void QWidgetDraw::drawWave(QPainter *painter, int data) { int width = this->width(); int height = this->hei