C++曲线图折线图QT窗体绘图excel数据导入

#include <QtCharts>
#include <iostream>
#include <qDebug>
#include <math.h>
using namespace std;

#include "MainWindow.h"

//
#include <QtCharts/QLineSeries>
#include <QtCharts/QSplineSeries>
#include <QPainter>



MainWindow::MainWindow(QWidget *parent)
	: QMainWindow(parent)
{
	ui.setupUi(this);


	//QObject::connect(ui.pushButton, SIGNAL(clicked()), this, SLOT(drawDisplay()));

    connect(ui.pushButton, &QPushButton::clicked, this, [=]()
        {
            /// 添加以下代码
            //QLineSeries* series = new QLineSeries();
            series->setPoints(true); // 设置数据点可见
            *series 
                << QPointF(11, 1)
                << QPointF(13, 3)
                << QPointF(17, 6)
                << QPointF(18, 3)
                << QPointF(20, 2);


            chart->legend()->hide();
            chart->addSeries(series);
            chart->createDefaultAxes();
            chart->setTitle("Simple line chart example");

            ui.graphicsView->setRenderHint(QPainter::Antialiasing);

        });


}


void QtChartZoomView::mouseMoveEvent(QMouseEvent *pEvent)
{
	if (m_bMiddleButtonPressed)
	{
		QPoint oDeltaPos = pEvent->pos() - m_oPrePos;
		this->chart()->scroll(-oDeltaPos.x(), oDeltaPos.y());
		m_oPrePos = pEvent->pos();
	}
	__super::mouseMoveEvent(pEvent);
}
void QtChartZoomView::mousePressEvent(QMouseEvent *pEvent)
{
	if (pEvent->button() == Qt::MiddleButton)
	{
		m_bMiddleButtonPressed = true;
		m_oPrePos = pEvent->pos();
		this->setCursor(Qt::OpenHandCursor);
	}
	__super::mousePressEvent(pEvent);
}
void QtChartZoomView::mouseReleaseEvent(QMouseEvent *pEvent)
{
	if (pEvent->button() == Qt::MiddleButton)
	{
		m_bMiddleButtonPressed = false;
		this->setCursor(Qt::ArrowCursor);
	}
	__super::mouseReleaseEvent(pEvent);
}
void QtChartZoomView::wheelEvent(QWheelEvent *pEvent)
{
	qreal rVal = std::pow(0.999, pEvent->delta()); // 设置比例
	// 1. 读取视图基本信息
	QRectF oPlotAreaRect = this->chart()->plotArea();
	QPointF oCenterPoint = oPlotAreaRect.center();
	// 2. 水平调整
	oPlotAreaRect.setWidth(oPlotAreaRect.width() * rVal);
	// 3. 竖直调整
	oPlotAreaRect.setHeight(oPlotAreaRect.height() * rVal);
	// 4.1 计算视点，视点不变，围绕中心缩放
	//QPointF oNewCenterPoint();
	// 4.2 计算视点，让鼠标点击的位置移动到窗口中心
	//QPointF oNewCenterPoint(pEvent->pos());
	// 4.3 计算视点，让鼠标点击的位置尽量保持不动(等比换算，存在一点误差)
	QPointF oNewCenterPoint(2 * oCenterPoint - pEvent->pos() - (oCenterPoint - pEvent->pos()) / rVal);
	// 5. 设置视点
	oPlotAreaRect.moveCenter();
	// 6. 提交缩放调整
	this->chart()->zoomIn(oPlotAreaRect);
	__super::wheelEvent(pEvent);
}