Question

I wanted to get the axisLabel value by clicking on it to plot a line graph? How can achieve this? Is there any possibilities to select each label value?. I have tried plot space delegate method of -(BOOL)plotSpace:(CPTPlotSpace *)space shouldHandlePointingDeviceDownEvent:(id)event atPoint:(CGPoint)point.By this i can able get bound values only. what would be the best solution?
Thanks in advance.

Answer 1

1. Convert the point from the coordinate system of the graph layer to the plot area:

   CGPoint pointInPlotArea = [space.graph convertPoint:interactionPoint
                                               toLayer:space.graph.plotAreaFrame.plotArea];
   

2. Convert the point to data coordinates:

   NSDecimal plotPoint[2];
   [space plotPoint:plotPoint forPlotAreaViewPoint:pointInPlotArea];
   

   or

   double plotPoint[2];
   [space doublePrecisionPlotPoint:plotPoint forPlotAreaViewPoint:pointInPlotArea];