On the Quote detail page, there are 2 buttons, which cause quote recalculation. The difference is in how many lines are calculated.
Recalculate - all line items are recalculated
Recalculate Changes - recalculate only the line items, which have some changes against the previously calculated version. (Note, that the button is on the line item’s panel with input parameters.)
A change of the line is, for example:
change of item’s input field
change of item’s label
change of item’s result override
change of header input field
A line item has field dirty, which is set by system to true for each line, which should be recalculated.
So for "full" recalculation, all items will be marked dirty.
For Recalculate Changes, only lines with some changes
If you want, you can read the value of the item’s dirty field in the header logic’s post-phase, and do only processing of the recalculated items.
...
The user clicks on Recalculate or Recalculate Changes
The system calls the quote header logic in pre-phase
usually the header logic creates input fields on the header, but can also change the structure of the document
The system sets the
dirtyflag for line items, either for all or only for the modified onesfor each "dirty" item the system will
call the quote item logic
take the logic’s element results, and store it on the line item
the system executes the header logic in post-phase
usually the header logic calculates some summarized results and creates the result fields
the user can see the recalculated results on the screen