QCustomPlot Discussion and Comments

Hi,

i will try to load from txt file date to qvector (Lipids class) and will send this qvector to function setData/addData. If i make a vector in class where is ploting graph its ok, but if i will try from other class, nothing happend.

dialog.cpp:

#include "dialog.h"
#include "ui_dialog.h"
#include "Lipids.h"

//QVector<double> dp1 ={1, 2 ,3 ,4}; //if I used this vectors all its allright
//QVector<double> dp2 ={1, 2, 3 , 4};
Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
    , ui(new Ui::Dialog)
{
    ui->setupUi(this);



    ui->plot->setInteraction(QCP::iRangeDrag, true);
    ui->plot->setInteraction(QCP::iRangeZoom, true);
    ui->plot->addGraph();

    ui->plot->xAxis->setLabel("Temperatura [K]");
    ui->plot->yAxis->setLabel("Entalpia [jednostki arbitralne]");
    ui->plot->xAxis->setRange(284,316);
    ui->plot->yAxis->setRange(-5,140);


}

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

void Dialog::addPoint()
{

}

void Dialog::plot()
{
    Lipids dmpc1, dmpc2;// This is artifact, from trying different solutions
    dmpc1.loadDataX();//This is artifact, from trying different solutions
    dmpc2.loadDataY();//This is artifact, from trying different solutions
    QVector<double> dp1 = dmpc1.getDataX();//This is artifact, from trying different solutions
    QVector<double> dp2 = dmpc2.getDataY();//This is artifact, from trying different solutions
    ui->plot->graph(0)->setData(dp1, dp2);
    ui->plot->replot();
    ui->plot->update();
}


void Dialog::on_Start_clicked()
{
plot();
}

Lipids.cpp:

#include "Lipids.h"
#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
#include <QVector>

//first I tried load data in one fuction to two vectors, then i changed for this 

void Lipids::loadDataX()
{
    std::ifstream input;
    input.open("1.txt", std::ios::in);
    while(input>>column1>>column2){
        lipidX.push_back(column1);
    }
}

void Lipids::loadDataY()
{
    std::ifstream input;
    input.open("1.txt", std::ios::in);
    while(input>>column1>>column2){
        lipidY.push_back(column2);
    }
}

QVector<double> &Lipids::getDataX()
{
    return lipidX;
}

QVector<double> &Lipids::getDataY()
{
    return lipidY;
}

Second question, I need to get the graph to draw point by point (with a delay in the appearance of subsequent points - I want to use Sleep(...)). I tried to modify setData() but it only gets a delay of displaying the whole graph, how to get it?

thx for helping