我想在一个柱状图的图例上方加个标签,如图所示:
使用环境哪个标签怎么加?
Huier_YFB 下午好🌅🌅🌅
本答案参考ChatGPT-3.5
要在QChart的图例上方加标签,可以通过以下步骤实现:
chart->legend()->setTitleText("标签");
QLabel *label = new QLabel("标签", chart);
label->setGeometry(chart->legend()->geometry().x(), chart->legend()->geometry().y() - label->height() - 5, chart->legend()->width(), label->height());
完整示例代码如下:
QChart *chart = new QChart();
// 创建柱状图,并将其添加到图表中
QBarSeries *series = new QBarSeries();
series->append(new QBarSet("出"));
series->append(new QBarSet("安"));
series->append(new QBarSet("电量监测"));
series->setLabelsVisible(true);
chart->addSeries(series);
QValueAxis *axisY = new QValueAxis;
chart->addAxis(axisY, Qt::AlignLeft);
series->attachAxis(axisY);
QBarCategoryAxis *axisX = new QBarCategoryAxis;
chart->addAxis(axisX, Qt::AlignBottom);
series->attachAxis(axisX);
// 设置图例
chart->legend()->setVisible(true);
chart->legend()->setAlignment(Qt::AlignBottom);
// 设置图例标题
chart->legend()->setTitleText("标签");
// 添加标签
QLabel *label = new QLabel("标签", chart);
label->setGeometry(chart->legend()->geometry().x(), chart->legend()->geometry().y() - label->height() - 5, chart->legend()->width(), label->height());
注意:上述示例中的代码是基于Qt的QChart模块,如果你使用的是其他绘图库或工具,可能需要相应的调整。