Qt_719/code/scope/scope.cpp

#include "scope.h"
#include "ui_scope.h"
#include <QGraphicsScene>
#include <QValueAxis>
#include <QLineSeries>
#include <QChart>

scope::scope(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::scope)
{
    ui->setupUi(this);
    QStandardItemModel* model = treeModel->tree_set();
    ui->tree_set->setModel(model);
    ui->tree_set->expandAll();
    // 将 QTreeView 的 clicked 信号连接到 handleTreeItemClicked 槽函数
    connect(ui->tree_set, &QTreeView::clicked, this, &scope::handleTreeItemClicked);

}

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

void scope::setTreeModel(tree_model_set* model)
{
    treeModel = model; // 设置 tree_model_set 实例
}

void scope::handleTreeItemClicked(const QModelIndex &index) {
    // 转发信号
    emit treeItemClicked(index);
}

// 图像初始化
void scope::Chart_Init()
{
    // 初始化 QChart 的实例
    chart = new QChart();
    lineSeries = new QSplineSeries();
    lineSeries->setName("测试曲线");
    chart->addSeries(lineSeries);

    // 声明并初始化 X 轴和 Y 轴
    QValueAxis *axisX = new QValueAxis();
    QValueAxis *axisY = new QValueAxis();
    axisX->setRange(0, MAX_X);
    axisY->setRange(-1.5, MAX_Y);

    axisX->setTickCount(10);
    axisY->setTickCount(10);

    QFont font("Microsoft YaHei", 8, QFont::Normal);
    axisX->setTitleFont(font);
    axisY->setTitleFont(font);
    axisX->setTitleText("X-Test");
    axisY->setTitleText("Y-Test");
    axisY->setGridLineVisible(false);

    chart->addAxis(axisX, Qt::AlignBottom);
    chart->addAxis(axisY, Qt::AlignLeft);
    lineSeries->attachAxis(axisX);
    lineSeries->attachAxis(axisY);

    // 创建一个 QGraphicsScene 并将 chart 添加进去
    QGraphicsScene *scene = new QGraphicsScene(this);
    scene->addItem(chart);

    // 将 QGraphicsScene 设置到 QGraphicsView
    ui->gra_scope11->setScene(scene);
    ui->gra_scope11->setRenderHint(QPainter::Antialiasing);  // 设置抗锯齿

    // 调整 QGraphicsView 的内容填充整个视口
    ui->gra_scope11->fitInView(scene->itemsBoundingRect(), Qt::KeepAspectRatio);

    // 使 QChart 填充整个 QGraphicsView
    QRectF viewRect = ui->gra_scope11->viewport()->rect();
    chart->resize(viewRect.width(), viewRect.height());

    // 设置 QGraphicsView 自动调整大小
    ui->gra_scope11->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
}
void scope::DrawLine(float data)
{
    static int count = 0;
    if(count > MAX_X)
    {
        //当曲线上最早的点超出X轴的范围时，剔除最早的点，
        lineSeries->removePoints(0,lineSeries->count() - MAX_X);
        // 更新X轴的范围
        chart->axisX()->setMin(count - MAX_X);
        chart->axisX()->setMax(count);
    }
    //增加新的点到曲线末端
    lineSeries->append(count, data);//
    count ++;
}