Source: plotting/hs_plot__cursor_within.pro
hs_plot::cursor_within Select the plot transform, within whose region the cursor lies. Usage: tform_index = pltref -> cursor_within( x, y) Arguments: x,y float input Normalized cursor coordinates. Restriction: If the cursor is not in any region then the transforms are unchanged, and -1 is returned. History: Original: 1/6/94; SJT Converted to function & Plot object method: 5/6/00; SJT Use !x & !y regions to deal with !p.multi: 14/11/00; SJT