QCustomPlot图形和图例同步方法

Posted 2020-11-27

QCustomPlot图形和图例同步前言

我现在有几条折线，折线和图例一一对应，不管点击图例或者折线，相关的都高亮

QCustomPlot图形和图例同步方法

// 链接信号槽 m_plot即为QCustomPlot对象
connect(m_plot, SIGNAL(selectionChangedByUser()), this, SLOT(selectionChanged()));

 

void ChartOperate::selectionChanged()
{
    for (int i=0; i<m_plot->graphCount(); ++i)
    {
        setSelectChtLineStyle(i);
    }
}

void ChartOperate::setSelectChtLineStyle(int sceneIndex)
{
    QCPGraph *graph = m_plot->graph(sceneIndex);
    QCPPlottableLegendItem *item = m_plot->legend->itemWithPlottable(graph);

    if (item->selected() || graph->selected())
    {
        item->setSelected(true);

        QPen pen;
        pen.setWidth(3);
        pen.setColor(COLOR_BLUE);
        graph->selectionDecorator()->setPen(pen);

        graph->setSelection(QCPDataSelection(graph->data()->dataRange()));
    }
}

 

QCustomPlot图形和图例同步最终效果

原文地址：https://itzhai.cn/xuexijiaocheng/884.html