使用qt编写一个程序，要求显示一个折线图，分成main.cpp mainwindow.h mainwindow.cpp三个文件，折线图的横坐标范围为0到1023，纵坐标范围为-50到50，要求图表可以随鼠标放大缩小和拉伸操作，请提供相应代码

main.cpp:

#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
}

mainwindow.h:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QtCharts/QChartView>
#include <QtCharts/QLineSeries>

QT_CHARTS_USE_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

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

private:
    QChartView *m_chartView;
    QLineSeries *m_series;
    qreal m_x;
    qreal m_y;

    void setupUI();
    void setupChart();
    void setupSeries();
    void setupAxis();

protected:
    void resizeEvent(QResizeEvent *event) override;
    void mousePressEvent(QMouseEvent *event) override;
    void mouseMoveEvent(QMouseEvent *event) override;
    void wheelEvent(QWheelEvent *event) override;
};

#endif // MAINWINDOW_H

mainwindow.cpp:

#include "mainwindow.h"
#include <QtCharts/QValueAxis>
#include <QMouseEvent>
#include <QScrollBar>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , m_chartView(new QChartView(this))
    , m_series(new QLineSeries(this))
    , m_x(0)
    , m_y(0)
{
    setupUI();
    setupChart();
    setupSeries();
    setupAxis();
}

MainWindow::~MainWindow()
{
}

void MainWindow::setupUI()
{
    setCentralWidget(m_chartView);
}

void MainWindow::setupChart()
{
    QChart *chart = new QChart();
    chart->addSeries(m_series);
    chart->legend()->hide();
    chart->setTitle("折线图");

    m_chartView->setChart(chart);
    m_chartView->setRenderHint(QPainter::Antialiasing);
    m_chartView->setRubberBand(QChartView::RectangleRubberBand);
}

void MainWindow::setupSeries()
{
    for (int i = 0; i < 1024; ++i) {
        m_series->append(i, qSin(i / 50.0) * 20);
    }
}

void MainWindow::setupAxis()
{
    QValueAxis *axisX = new QValueAxis();
    axisX->setRange(0, 1023);
    axisX->setLabelFormat("%d");
    axisX->setTitleText("横轴");

    QValueAxis *axisY = new QValueAxis();
    axisY->setRange(-50, 50);
    axisY->setLabelFormat("%.2f");
    axisY->setTitleText("纵轴");

    QChart *chart = m_chartView->chart();
    chart->setAxisX(axisX, m_series);
    chart->setAxisY(axisY, m_series);
}

void MainWindow::resizeEvent(QResizeEvent *event)
{
    QMainWindow::resizeEvent(event);

    QRectF rect = m_chartView->chart()->plotArea();
    rect.setWidth(m_chartView->width());
    m_chartView->chart()->setPlotArea(rect);
}

void MainWindow::mousePressEvent(QMouseEvent *event)
{
    m_x = event->pos().x();
    m_y = event->pos().y();
}

void MainWindow::mouseMoveEvent(QMouseEvent *event)
{
    int dx = event->pos().x() - m_x;
    int dy = event->pos().y() - m_y;

    if (event->buttons() & Qt::LeftButton) {
        m_chartView->chart()->scroll(dx, -dy);
    }

    m_x = event->pos().x();
    m_y = event->pos().y();
}

void MainWindow::wheelEvent(QWheelEvent *event)
{
    int delta = event->angleDelta().y();
    qreal factor = qPow(1.0015, delta);

    QRectF rect = m_chartView->chart()->plotArea();
    qreal centerX = rect.x() + rect.width() / 2;
    qreal centerY = rect.y() + rect.height() / 2;
    qreal newWidth = rect.width() * factor;
    qreal newHeight = rect.height() * factor;

    if (newWidth > 10 && newHeight > 10) {
        rect.setX(centerX - newWidth / 2);
        rect.setY(centerY - newHeight / 2);
        rect.setWidth(newWidth);
        rect.setHeight(newHeight);
        m_chartView->chart()->zoomIn(rect);
    }
}