Chart Selection

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

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