QChart 设置图例折线图名称在同一条线上在在名称前添加图片

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首先嵌套QGraphicsScene自己做一个头

void CreateTopWidget::initWidget()

{

    setStyleSheet("background-color:rgb(8, 21, 66);");

    m_scene = new QGraphicsScene();

    m_scene->setSceneRect(0, 0, 100, 10);

    m_grapView = new QGraphicsView();

    m_grapView->setStyleSheet("border: 3px solid rgb(8, 21, 66);");

    m_grapView->setScene(m_scene);

    QHBoxLayout * lay = new QHBoxLayout();

    lay->setContentsMargins(9, 0, 0, 0);

    lay->setSpacing(0);

    setLayout(lay);

    QWidget * widget = new QWidget();

    QHBoxLayout* tblay = new QHBoxLayout();

    tblay->setContentsMargins(0, 0, 0, 0);

    tblay->setSpacing(20);

    widget->setLayout(tblay);

    lb_img = new QLabel();

    tblay->addWidget(lb_img);

    lb_name = new QLabel();

    tblay->addWidget(lb_name);

    QSpacerItem* spacer = new QSpacerItem(20, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);

    tblay->addSpacerItem(spacer);

    QHBoxLayout* btnLay = new QHBoxLayout();

    btnLay->setContentsMargins(0, 0, 0, 0);

    QWidget* wt_title = new QWidget();

    wt_title->setGeometry(0, 0, 100, 10);

    btnLay->addWidget(wt_title);

    tblay->addLayout(btnLay);

    QHBoxLayout* hblay = new QHBoxLayout();

    hblay->setContentsMargins(0, 0, 0, 0);

    hblay->setSpacing(0);

    wt_title->setLayout(hblay);

    hblay->addWidget(m_grapView);

    lay->addWidget(widget);

}

因为QChart + QGraphicsScene 也可以使用，所以以QGraphicsView为基类

MyChart::MyChart(QWidget *parent) : QGraphicsView(parent)

{

    initWidget();

}

void MyChart::initWidget()

{

    m_grapScene = new QGraphicsScene();

    this->setScene(m_grapScene);

    wt_top = new CreateTopWidget();

    m_chart = new QChart();

    QBrush brush(QColor(8, 21, 66));

    m_chart->setBackgroundBrush(brush);

    m_chart->setAnimationOptions(QChart::SeriesAnimations);

    m_chart->createDefaultAxes();

    QLegend *le = m_chart->legend();

    m_grapScene->addItem(m_chart);

    m_grapScene->addWidget(wt_top);

    wt_top->setGrapScene(le);//获取当前图例放入QGraphicsScene中

}

之后

void MainWindow::initWidget()

{

    QGraphicsScene* scene = new QGraphicsScene();

    scene->setSceneRect(0, 10, 400, 300);

    QGraphicsView* view = new QGraphicsView();

    view->setScene(scene);

    view->setSceneRect(0, 0, 400, 300);

    MyChart *chart = new MyChart();

    chart->setTitle(":/icon.png", "Series 样例");

    chart->setGeometrys(0, 10, 600, 400);

    QBarCategoryAxis* Axis = new QBarCategoryAxis();

    Axis->setGridLineVisible(false);

    Axis->setLabelsColor(QColor(255, 255, 255));

    QStringList list;

    list<<"0"<<"1"<<"2"<<"3"<<"4"<<"5";

    Axis->append(list);

    QValueAxis* AxisY = new QValueAxis;

    AxisY->setLabelsColor(QColor(255, 255, 255));

    AxisY->setMinorGridLineVisible(false);

    AxisY->setGridLineVisible(false);

    AxisY->setLabelFormat("%d"); //设置刻度的格式

    AxisY->setRange(0, 10);

    AxisY->setTickCount(5);     //设置多少格

    AxisY->setMinorTickCount(5); //设置每格小刻度线的数目

    QSplineSeries *series = new QSplineSeries(chart);

    QList<QPointF> pointF;

    pointF<<QPoint(0,1)<<QPoint(1,1)<<QPoint(2,2)<<QPoint(3,3)<<QPoint(4,4);

    series->append(pointF);

    QString name("Series ");

    series->setName(name + QString::number(0));

    QSplineSeries *series1 = new QSplineSeries(chart);

    QList<QPointF> pointF1;

    pointF1<<QPoint(0,9)<<QPoint(1,4)<<QPoint(2,3)<<QPoint(3,1)<<QPoint(4,10);

    series1->append(pointF1);

    series1->setName(name + QString::number(1));

    chart->Legend()->setLabelColor(QColor(255,255,255));

    chart->addSeries(series);

    chart->addSeries(series1);

    chart->setAxisX(Axis, series);

    chart->setAxisX(Axis, series1);

    chart->setAxisY(AxisY, series);

    chart->setAxisY(AxisY, series1);

    ui->widget->layout()->addWidget(chart);

}

效果图：

下载地址：https://download.csdn.net/download/u010304326/10539740

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