Chart Selection

In addition to the Chart's integrated tooltip functionality, the following Chart methods can be used to handle user interaction with a chart:

• GlgGetSelectedPlot of the C API may be used to query the plot object corresponding to the last chart legend item selected with the mouse, if any
  
  
• CreateChartSelection may be used to query data sample selection at the mouse position
  
  
• CreateTooltipString may be used to implement custom tooltips
  
  
• PositionToValue may be used to query an Axis or Chart value corresponding to the current mouse position.