QTimeEdit to Double

[EUduardo]

Hello guys, this is my first post in this forum, so sorry if i did something wrong
bascly i trying to learn QCustomPlot and i want to make a xAxis in time format (0 to 20 hh:mm:ss) receive a value from QTimeEdit, but QCustomPlot use double and QTimeEdit use QTime.
i can't figure out how to convert QTime to double.

i dont know how this gona help, but here is the code

thanks in advance

Header

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

    void addpoint(double x, double y);
    void clearData();
    void plot();

private slots:
    //void on_timeEdit_2_userTimeChanged(const QTime &time);

    void on_pushButton_clicked();

    void on_pushButton_2_clicked();

    void on_bx_x_userTimeChanged(const QTime &time);

private:
    Ui::MainWindow *ui;

    QVector<double> qv_x, qv_y;
};
#endif // MAINWINDOW_H

CPP

#include "mainwindow.h"
#include "ui_mainwindow.h"
//std::string bxval;
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->plot->addGraph();
    ui->plot->graph(0)->setScatterStyle((QCPScatterStyle::ssCircle));
    ui->plot->graph(0)->setLineStyle(QCPGraph::lsLine);
    ui->plot->graph()->setPen(QPen(Qt::blue));
    ui->plot->graph()->setBrush(QBrush(QColor(0, 0, 255, 20)));
    QSharedPointer<QCPAxisTickerTime> timeTicker(new QCPAxisTickerTime);
    ui->plot->xAxis->setTicker(timeTicker);
    ui->plot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);

}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::addpoint(double x, double y)
{
    qv_x.append(x);
    qv_y.append(y);
}

void MainWindow::clearData()
{
    qv_x.clear();
    qv_y.clear();
}

void MainWindow::plot()
{
    ui->plot->graph(0)->setData(qv_x, qv_y);
    ui->plot->replot();
    ui->plot->update();
}


//void MainWindow::on_timeEdit_2_userTimeChanged(const QTime &time)
//{

//}

void MainWindow::on_pushButton_clicked()
{
//    addpoint(bxval,ui->bx_y->value());
    addpoint(ui->bx_y->value(),ui->bx_y->value());
    plot();
}

void MainWindow::on_pushButton_2_clicked()
{
    clearData();
    plot();
}

//void MainWindow::on_bx_x_userTimeChanged(const QTime &time)
//{
//    bxval = std::to_string(time);
//}

edit: "typo" QTimeEdit to double

[SGaist]

Hi and welcome to devnet,

@EUduardo said in QTimeEdit to Double:

i can't figure out how to convert QTime to QTimeEdit.

Do you mean set a QTime value on QTimeEdit ?

[Bonnie]

@SGaist
I think he means to convert QTime to double as x/y value.

[nagesh]

@EUduardo QTime class provides function to get the "delta" time between the two "Qtimes".
You can convert the time to elapsed count, having origin Time as reference time.
eg:
QTime timeOrigin(5,30,0);
QTime timeXVal1(5,45,0);
int elapsedSec =timeOrigin.secsTo(timeXVal1);
this elapsedSec value can be used for plot the value in X-Axis.

[EUduardo]

@nagesh said in QTimeEdit to Double:

@EUduardo QTime class provides function to get the "delta" time between the two "Qtimes".
You can convert the time to elapsed count, having origin Time as reference time.
eg:
QTime timeOrigin(5,30,0);
QTime timeXVal1(5,45,0);
int elapsedSec =timeOrigin.secsTo(timeXVal1);
this elapsedSec value can be used for plot the value in X-Axis.

it worked, thanks, this is what i did:

const QTime timeOrigin(0,0,0);
int xval;

void MainWindow::on_QTimeEdit_userTimeChanged(const QTime &time)
{
    xval = timeOrigin.secsTo(time);
}

void MainWindow::on_confirmBTN_clicked()
{
    addpoint(xval,ui->bx_y->value());
    plot();
}