QT实时绘制串口数据

#include "history.h" #include "qdebug.h" history::history() { file1.setFileName("D:/QT5.5things/object/history1.txt"); file2.setFileName("D:/QT5.5things/object/history2.txt"); } history::~history() { file1.close(); file2.close(); } QVector<double> history::viewing_beginner1() { file1.close(); file2.close(); if(!file1.isOpen()) file1.open(QIODevice::ReadWrite| QIODevice::Text); filedata1=file1.readAll(); //qDebug()<<filedata1.size(); //file1.close(); totalpage1=(filedata1.size()/8000)+1; currentpage1=1; historylistdata1.clear(); if(!movecounter1) movecounter1=0; int counter1=0; QVector<double> historytopaint1; // 存储业务数据的 lis while (counter1<1000) { historylistdata1<<filedata1.left(8).toFloat(); filedata1.remove(0,8); counter1++; } for(movecounter1=0;movecounter1<1000;movecounter1++) { historytopaint1<<historylistdata1[movecounter1]; } QVector<double> historytopaint=historytopaint1; //qDebug()<<historytopaint.size(); return historytopaint; } QVector<double> history::viewing_beginner2() { file2.close(); if(!file2.isOpen()) file2.open(QIODevice::ReadWrite | QIODevice::Text); filedata2=file2.readAll(); //file2.close(); totalpage2=(filedata2.size()/8000)+1; currentpage2=1; historylistdata2.clear(); if(!movecounter2) movecounter2=0; int counter2=0; QVector<double> historytopaint2;//存储业务数据的 list while (counter2<1000) { historylistdata2<<filedata2.left(8).toFloat(); filedata2.remove(0,8); counter2++; } for(movecounter2=0;movecounter2<1000;movecounter2++) { historytopaint2<<historylistdata2[movecounter2]; } QVector<double> historytopaint=historytopaint2; return historytopaint; } void history::file_writer(int who, QByteArray dataTOfile) { if(who==1) { if(!file1.isOpen()) file1.open(QIODevice::WriteOnly | QIODevice::Text); file1.write(dataTOfile); //file1.close(); } if(who==2) { if(!file2.isOpen()) file2.open(QIODevice::WriteOnly | QIODevice::Text); file2.write(dataTOfile); // file2.close(); } } void history::clearHistory() { file1.resize(0); file2.resize(0); } QVector<double> history::nextPage1() { if(currentpage1==totalpage1) { qDebug() <<"当前已是通道1最新数据"; return next_container1; } else { if(currentpage1!=totalpage1) currentpage1++; int counter1=0; int paintcounter1=0; QVector<double> historytopaint1; // 存储业务数据的 list while (counter1<1000) { historylistdata1<<filedata1.left(8).toFloat(); filedata1.remove(0,8); counter1++; if(filedata1.size()<8) break; } for(;paintcounter1<1000&&movecounter1<=(historylistdata1.size()-1);movecounter1++) { historytopaint1<<historylistdata1.at(movecounter1); paintcounter1++; } next_container1=historytopaint1; return next_container1; } } QVector<double> history::nextPage2() { if(currentpage2==totalpage2) { qDebug() <<"当前已是通道2最新数据"; return next_container2; } else { if(currentpage2!=totalpage2) currentpage2++; int counter2=0; int paintcounter2=0; QVector<double> historytopaint2; // 存储业务数据的 list while (counter2<1000) { historylistdata2<<filedata2.left(8).toFloat(); filedata2.remove(0,8); counter2++; if(filedata2.size()<8) break; } for(;paintcounter2<1000&&movecounter2<=(historylistdata2.size()-1);movecounter2++) { historytopaint2<<historylistdata2.at(movecounter2); paintcounter2++; } next_container2=historytopaint2; return next_container2; } } QVector<double> history::lastPage1() { if(currentpage1==1) { qDebug() <<"当前已是通道1最早数据"; return last_container1; } else { if(currentpage1>1) currentpage1--; QVector<double> historytopaint1; // 存储业务数据的 list int paintcounter1=0; if(historylistdata1.size()%1000) { for( movecounter1=movecounter1-1-1000-(historylistdata1.size()-(historylistdata1.size()/1000)*1000);paintcounter1<1000;movecounter1++) { historytopaint1<<historylistdata1.at( movecounter1); paintcounter1++; } } else { for( movecounter1=movecounter1-2*1000+1;paintcounter1<1000;movecounter1++) { historytopaint1<<historylistdata1.at( movecounter1); paintcounter1++; } } last_container1=historytopaint1; return last_container1; } } QVector<double> history::lastPage2() { if(currentpage2==1) { qDebug() <<"当前已是通道2最早数据"; return last_container2; } else { if(currentpage2>1) currentpage2--; QVector<double> historytopaint2; // 存储业务数据的 list int paintcounter2=0; if(historylistdata2.size()%1000) { for( movecounter2=movecounter2-1-1000-(historylistdata2.size()-(historylistdata2.size()/1000)*1000);paintcounter2<1000;movecounter2++) { historytopaint2<<historylistdata2.at( movecounter2); paintcounter2++; } } else { for( movecounter2=movecounter2-2*1000+1;paintcounter2<1000;movecounter2++) { historytopaint2<<historylistdata2.at( movecounter2); paintcounter2++; } } last_container2=historytopaint2; return last_container2; } }