Legend Toggle

Toggle visibility of graphics objects by clicking on legend. Allows for custom callback function.

This function allows you to toggle the visibility of line/patch/surface objects, by clicking on the corresponding entry in the legend.

Function outputs a logical vector corresponding to the visibility of each handle object.

A custom callback can be specified to run after each object is toggled.

Currently, only supports line, patch, and surface objects. All objects must be parented to same axes.