#include "frmquadratic.h"
#include "ui_frmquadratic.h"
#include "qdebug.h"

frmQuadratic::frmQuadratic(QWidget *parent) : QWidget(parent), ui(new Ui::frmQuadratic)
{
    ui->setupUi(this);
    this->initForm();
}

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

void frmQuadratic::initForm()
{
    // generate some data:
    QVector<double> x(101), y(101); // initialize with entries 0..100
    for (int i = 0; i < 101; ++i) {
        x[i] = i / 50.0 - 1; // x goes from -1 to 1
        y[i] = x[i] * x[i]; // let's plot a quadratic function
    }

    // create graph and assign data to it:
    ui->customPlot->addGraph();
    ui->customPlot->graph(0)->setData(x, y);
    // give the axes some labels:
    ui->customPlot->xAxis->setLabel("x");
    ui->customPlot->yAxis->setLabel("y");
    // set axes ranges, so we see all data:
    ui->customPlot->xAxis->setRange(-1, 1);
    ui->customPlot->yAxis->setRange(0, 1);
    ui->customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
}