Hi. I want to plot datas which are read from txt file. How can i do it? What should be the next step?
#include "mainwindow.h" #include "ui_mainwindow.h" #include <QFile> #include <QTextStream> #include <QMessageBox> #include <QTimer> #include <QList> #include <qlist.h> #include <QDebug> #include <QtCharts/QLineSeries> #include <QtCharts/QChart> #include <QtCharts/QDateTimeAxis> #include <QDateTime> #include <QtCharts/QValueAxis> #include <QtCharts/QChartView> #include <QLine> #include <QString> QT_CHARTS_USE_NAMESPACE using namespace QtCharts; QTimer *timer = new QTimer(); MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); connect(timer, SIGNAL(timeout()), SLOT(Timer_Slot())); } void MainWindow::Timer_Slot() { QString line = allLines[curIndex]; ui->plainTextEdit->setPlainText(line); if (curIndex < allLines.size() - 1 ) { curIndex++; } } MainWindow::~MainWindow() { delete ui; } void MainWindow::on_pushButton_2_clicked() //write { QFile file("C:/Users/ilknu/Documents/QFileDemo/abc.txt"); if(!file.open(QFile::WriteOnly | QFile::Text )) { QMessageBox::warning(this, "title", "file not open"); } QTextStream out (&file); QString text = ui->plainTextEdit->toPlainText(); out << text; file.flush(); file.close(); } void MainWindow::on_pushButton_clicked() //read { // QLineSeries *series = new QLineSeries(); QFile file("C:/Users/ilknu/Documents/QFileDemo/abc.txt"); if (file.open(QIODevice::ReadOnly)) { QTextStream in (&file); while (!in.atEnd()) { //QString line = in.readLine(); //allLines.append(line); QString line = in.readLine(); allLines.append(line); QStringList list = line.split(QLatin1Char(' '), Qt::SkipEmptyParts); for(const QString &entry : list) { double num = entry.toDouble(); qDebug()<<num; } }} file.close(); curIndex=0; timer->start(200); } 0