场景
Winform中设置ZedGraph鼠标悬浮显示距离最近曲线上的点的坐标值和X轴与Y轴的标题:
https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/103140781
上面博客能实现鼠标悬浮显示最近的曲线上点的坐标值与X轴和Y轴的标题,
如果想要再显示其他信息,比如曲线所对应的文件名等。
那么就要在生成曲线时将自定义要保存的信息与曲线进行绑定存储。
注:
博客主页:
https://blog.csdn.net/badao_liumang_qizhi
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实现
ZedGraph的曲线对象是LineItem,其有一属性Tag可以用它来存储额外信息。
在生成曲线时
LineItem myCurve = myPane.AddCurve(yList[i].Title, list, System.Drawing.ColorTranslator.FromHtml(yList[i].Color), symbolType); //使用曲线TAG存储数据库名 文件名 //文件完整路径 string filePath = compTestDataList[k].ThisDataFile; //文件名 string fileName = System.IO.Path.GetFileNameWithoutExtension(filePath); //数据库名 string dBName = System.IO.Directory.GetParent(filePath).ToString(); dBName = dBName.Substring(dBName.LastIndexOf('\') + 1); dBName = "DB_" + dBName; //短文件名 string[] titles = fileName.Split('_'); string shortFileName = "柜" + titles[titles.Length - 2] + "通道" + titles[titles.Length - 1]; myCurve.Tag = dBName + shortFileName; myCurve.YAxisIndex = i;
生成曲线时使用曲线对象的Tag属性存储了自定义的一些信息。
那么在鼠标的悬浮事件中
tag = nearstCurve.Tag.ToString();
完整示例代码
private static string zgc_CursorValueEvent(ZedGraphControl sender, GraphPane pane, Point mousePt) { ZedGraphControl zgc = sender as ZedGraphControl; if (zgc != null) { CurveItem nearstCurve; int i; Double x = 0.0; Double y = 0.0; string xTitle = String.Empty; string yTtile = String.Empty; string tag = String.Empty; string xVlaue = String.Empty; string z = String.Empty; try { zgc.GraphPane.FindNearestPoint(mousePt, out nearstCurve, out i); if (nearstCurve != null && nearstCurve.Points.Count > i && nearstCurve.Points[i] != null) { z = nearstCurve.Points[i].Tag.ToString(); y = nearstCurve.Points[i].Y; xTitle = zgc.GraphPane.XAxis.Title.Text; //获取当前pane面板的YAxis的标题的文本内容,通过nearstCurve.YAxisIndex获取当前距离最近的曲线所对应的Y轴的Index yTtile = zgc.GraphPane.YAxisList[nearstCurve.YAxisIndex].Title.Text; tag = nearstCurve.Tag.ToString(); } } catch (Exception ex) { } return tag+ " X-" + xTitle + ": " + z + " Y-" + yTtile + ": " + y.ToString(); } else { return String.Empty; } }