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);
}
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