update abstract method

void update(
  1. ValueCell cell,
  2. bool didChange
)

The observed cell has changed its value.

This method is called after the value of cell has been recomputed.

If it is known that the value of cell has not changed, didChange is false otherwise a value of true for didChange indicates that cell's value may have changed (but necessarily has).

cell.value now holds the cell's new value.

Implementation

void update(ValueCell cell, bool didChange);