#region 光标捕捉
/// <summary>
/// 点击鼠标保存文本
/// </summary>
private List<StorAnnos> StorageAnnos = new List<StorAnnos>();
/// <summary>
/// TeeChart线条的指示工具
/// </summary>
Steema.TeeChart.Tools.CursorTool cursorTool;
/// <summary>
/// 鼠标指示显示的文本
/// </summary>
private Steema.TeeChart.Tools.Annotation annotation;
/// <summary>
/// 初始化线条的提示工具信息
/// </summary>
private void InitTeeChartTipTools(Steema.TeeChart.TChart tChart)
{
//以线形式对标坐标轴
cursorTool = new Steema.TeeChart.Tools.CursorTool(tChart.Chart);
cursorTool.Style = Steema.TeeChart.Tools.CursorToolStyles.Both;
cursorTool.Pen.Style = System.Drawing.Drawing2D.DashStyle.Dash;
cursorTool.Pen.Color = Color.Black;
cursorTool.FollowMouse = true;
cursorTool.Active = true;
cursorTool.Change += CursorTool_Change;
//设置提示文本的信息
annotation = new Steema.TeeChart.Tools.Annotation(tChart.Chart);
annotation.Shape.Font.Name = "Arial";
annotation.Shape.Font.Size = 9;
annotation.Shape.Pen.Visible = true;
annotation.Shape.Shadow.Visible = true;
annotation.Shape.ShapeStyle = Steema.TeeChart.Drawing.TextShapeStyle.Rectangle;
annotation.Position = Steema.TeeChart.Tools.AnnotationPositions.LeftBottom;
annotation.TextAlign = StringAlignment.Center;
annotation.Active = true;
for (int i = 0; i < tChart.Series.Count; i++)
{
tChart.Series[i].MouseEnter += Line_MouseEnter;
tChart.Series[i].MouseLeave += Line_MouseLeave;
tChart.Series[i].Click += Line_Click;
}
tChart.MouseLeave += TChart_MouseLeave;
tChart.MouseEnter += TChart_MouseEnter;
tChart.MouseUp += TChart_MouseUp;
tChart.Zoomed += tChart_Zoomed;
tChart.UndoneZoom += tChart_Zoomed;
}
/// <summary>
/// 去除选中标记
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void TChart_MouseUp(object sender, MouseEventArgs e)
{
_ = Task.Run(async () =>
{
await Task.Delay(50);
StorDeAnnos deAnnos = new StorDeAnnos();
bool isBreak = false;
for (var i = 0; i < StorageAnnos.Count; i++)
{
for (var j = 0; j < StorageAnnos[i].annotations.Count; j++)
{
StorDeAnnos anno = StorageAnnos[i].annotations[j];
if (anno.anno == null) continue;
if (anno.anno.Left - 20 < e.X && anno.anno.Top < e.Y && (anno.anno.Left + anno.anno.Width) > e.X && (anno.anno.Top + anno.anno.Height + 20) > e.Y)
{
if ((DateTime.Now - anno.dateTime).TotalSeconds > 1)
{
deAnnos = anno;
isBreak = true;
break;
}
}
}
if (isBreak) break;
}
if (isBreak && StorageAnnos.Exists(a => a.annotations.Exists(o => o == deAnnos)))
{
deAnnos.anno.Dispose();
StorageAnnos.ForEach(a => a.annotations.Remove(deAnnos));
}
});
}
/// <summary>
/// 保存注释
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Line_Click(object sender, MouseEventArgs e)
{
Line line = sender as Line;
if (StorageAnnos.Exists(a => a.line == line))
{
List<StorDeAnnos> annotations = StorageAnnos.Find(a => a.line == line).annotations;
bool oldanno = false;
for (var i = 0; i < annotations.Count; i++)
{
StorDeAnnos anno = annotations[i];
if (anno.anno == null) continue;
if (anno.anno.Left - 20 < e.X && anno.anno.Top < e.Y && (anno.anno.Left + anno.anno.Width) > e.X && (anno.anno.Top + anno.anno.Height + 20) > e.Y)
{
oldanno = true;
break;
}
}
if (!oldanno)
{
var anno = annotation.Clone() as Steema.TeeChart.Tools.Annotation;
annotations.Add(new StorDeAnnos() { anno = anno });
}
}
else
{
var anno = annotation.Clone() as Steema.TeeChart.Tools.Annotation;
StorageAnnos.Add(new StorAnnos() { line = line, annotations = new List<StorDeAnnos>() { new StorDeAnnos() { anno = anno } } });
}
}
/// <summary>
/// 鼠标进入TeeChart的事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void TChart_MouseEnter(object sender, EventArgs e)
{
cursorTool.Chart = this.tChart1.Chart;
}
/// <summary>
/// 鼠标离开TeeChart的事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void TChart_MouseLeave(object sender, EventArgs e)
{
cursorTool.Chart = null;
}
/// <summary>
/// 当鼠标进入线条时，将TeeChart的cursorTool工具指示的线条设置为对应的线条
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Line_MouseEnter(object sender, EventArgs e)
{
cursorTool.Series = sender as Steema.TeeChart.Styles.Series;
}
/// <summary>
/// 当鼠标离开线条时，将TeeChart的cursorTool工具指示的线条设置为null
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Line_MouseLeave(object sender, EventArgs e)
{
cursorTool.Series = null;
}
/// <summary>
/// 鼠标指示工具改变事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void CursorTool_Change(object sender, Steema.TeeChart.Tools.CursorChangeEventArgs e)
{
try
{
Steema.TeeChart.Tools.CursorTool cursor = sender as Steema.TeeChart.Tools.CursorTool;
if (cursor != null && cursor.Series != null)
{
annotation.Text = string.Format("{0},{1}", cursor.XValue.ToString("f1"), cursor.YValue.ToString("f1"));
annotation.Top = cursor.Series.GetVertAxis.CalcYPosValue(InterpolateLineSeries(cursor.Series, cursor.XValue));
annotation.Left = tChart1.Axes.Bottom.CalcXPosValue(cursor.XValue);
annotation.Top -= 20;//将文本放在鼠标上方
SizeF size = this.CreateGraphics().MeasureString(annotation.Text,
new Font(annotation.Shape.Font.Name, annotation.Shape.Font.Size));
if (annotation.Left + size.Width + 12 >= annotation.Chart.Width)
{
annotation.Left -= (int)size.Width + 12;//防止文本标签超出右边界而看不全
}
}
else
{
//将其设置到控件外部
annotation.Text = "";
annotation.Top = annotation.Chart.Height + 5;
annotation.Left = annotation.Chart.Width + 5;
}
}
catch (Exception ex)
{
annotation.Text = ex.Message;
annotation.Top = 5;
annotation.Left = 5;
}
}
/// <summary>
/// 计算某一点的Y值坐标
/// </summary>
/// <param name="series">曲线</param>
/// <param name="xvalue">对应的X轴的值</param>
/// <returns>计算得到的对应的Y轴的值</returns>
private double InterpolateLineSeries(Steema.TeeChart.Styles.Series series, double xvalue)
{
try
{
int index;
for (index = series.FirstVisibleIndex; index <= series.LastVisibleIndex; index++)
{
if (index == -1 || series.XValues.Value[index] > xvalue) break;
}
// safeguard
if (index < 1)
{
index = 1;
}
else if (index >= series.Count)
{
index = series.Count - 1;
}
// y=(y2-y1)/(x2-x1)*(x-x1)+y1
double dx = series.XValues[index] - series.XValues[index - 1];
double dy = series.YValues[index] - series.YValues[index - 1];
if (dx != 0.0)
{
return dy * (xvalue - series.XValues[index - 1]) / dx + series.YValues[index - 1];
}
else
{
return 0.0;
}
}
catch (Exception ex)
{
return 0.0;
}
}
/// <summary>
/// tChart放大缩小
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void tChart_Zoomed(object sender, EventArgs e)
{
_ = Task.Run(async () =>
{
await Task.Delay(50);
for (var i = 0; i < StorageAnnos.Count; i++)
{
Line line = StorageAnnos[i].line;
for (var j = 0; j < StorageAnnos[i].annotations.Count; j++)
{
StorDeAnnos anno = StorageAnnos[i].annotations[j];
if (anno.anno == null) continue;
int x = (int)Convert.ToDouble(anno.anno.Text.Split(',')[0]);
anno.anno.Top = line.CalcYPos(x) - 20;
anno.anno.Left = line.CalcXPos(x);
if ((anno.anno.Left + anno.anno.Width + 12 >= anno.anno.Chart.Width))
{
anno.anno.Left -= (int)anno.anno.Width + 12;
}
}
}
});
}
class StorAnnos
{
public Line line { get; set; }
public List<StorDeAnnos> annotations { get; set; } = new List<StorDeAnnos>();
}
class StorDeAnnos
{
public DateTime dateTime { get; set; } = DateTime.Now;
public Annotation anno { get; set; }
}
#endregiontChart光标捕捉优化
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平台声明：文章内容（如有图片或视频亦包括在内）由作者上传并发布，文章内容仅代表作者本人观点，简书系信息发布平台，仅提供信息存储服务。
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