I am drawing a pie chart using the CPTXYGraph in Core Plot. I have used the delegate method

```
-(void)pieChart:(CPTPieChart *)plot sliceWasSelectedAtRecordIndex:(NSUInteger)index

```

to perform some actions when a particular slice of a pie is clicked. But when I touch the piechart I need to have a feedback or some type of image change to be shown to signify that particular slice is touched just like the button events.

Are there any delegate methods to achieve the same.