QT 中QStripLinesCollection使用

QStripLinesCollection是Qt中的一个类，用于绘制图表中的垂直或水平线条。可以通过以下步骤在Qt中使用QStripLinesCollection：

1. 创建QCustomPlot对象：

QCustomPlot *customPlot = new QCustomPlot(this);

2. 添加一条垂直线：

QCPItemStraightLine *vLine = new QCPItemStraightLine(customPlot);
vLine->setPen(QPen(Qt::red));
vLine->point1->setCoords(2, 0);
vLine->point2->setCoords(2, 10);

3. 添加一条水平线：

QCPItemStraightLine *hLine = new QCPItemStraightLine(customPlot);
hLine->setPen(QPen(Qt::green));
hLine->point1->setCoords(0, 5);
hLine->point2->setCoords(10, 5);

4. 添加QStripLinesCollection对象：

QCPItemStraightLine *stripLine1 = new QCPItemStraightLine(customPlot);
stripLine1->setPen(QPen(Qt::blue));
stripLine1->point1->setCoords(4, 0);
stripLine1->point2->setCoords(4, 10);
QCPItemStraightLine *stripLine2 = new QCPItemStraightLine(customPlot);
stripLine2->setPen(QPen(Qt::blue));
stripLine2->point1->setCoords(6, 0);
stripLine2->point2->setCoords(6, 10);
QStripLinesCollection *stripLines = new QStripLinesCollection(customPlot);
stripLines->add(stripLine1);
stripLines->add(stripLine2);

5. 显示图表：

customPlot->replot();