在图表上方绘制标注

注意:这是 “带小部件的图表”示例库的一部分。

显示两条曲线中某一点被标出的截图

QChart 类提供了两个方法,用于在场景坐标与系列域(由坐标轴范围定义)之间进行映射。

QPointF QChart::mapToPosition(const &value, QAbstractSeries *series)QPointF

QPointF QChart::mapToValue(const &position, QAbstractSeries *series)QPointF

© 2026 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.