/// <summary>
/// private method for handling MouseMove events to display tooltips over
/// individual datapoints.
/// </summary>
/// <param name="sender">
/// A reference to the control that has the MouseMove event.
/// </param>
/// <param name="e">
/// A MouseEventArgs object.
/// </param>
private void ZedGraphControl_MouseMove(object sender,
System.Windows.Forms.MouseEventArgs e)
{
if (isShowPointValues)
{
CurveItem curve;
int iPt;
if (graphPane.FindNearestPoint(new PointF(e.X, e.Y),
out curve, out iPt))
{
if (curve.Points[iPt].Tag is string)
{
this.pointToolTip.SetToolTip(this,
(string)curve.Points[iPt].Tag);
}
else
{
this.pointToolTip.SetToolTip(this,
curve.Points[iPt].ToString(this.pointValueFormat));
}
this.pointToolTip.Active = true;
}
else
{
this.pointToolTip.Active = false;
}
}
}
public static object GetObject(this ZedGraphControl zgc, MouseEventArgs e)
{
for (int i = 0; i < zgc.MasterPane.PaneList.Count; i++)
{
GraphPane myPane = zgc.MasterPane.PaneList[i];
CurveItem item;
int iNearest;
myPane.FindNearestPoint(new PointF(e.X, e.Y), out item, out iNearest);
if (null != item)
{
return(item.Points[iNearest].Tag);
}
}
return(null);
}