On the Quote detail page, there are 2 buttons, which cause quote recalculation. The difference is in how many lines are calculated.
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Recalculate - all line items are recalculated
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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:
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change of item’s input field
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change of item’s label
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change of item’s result override
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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.
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So for "full" recalculation, all items will be marked dirty.
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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.
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The user clicks on Recalculate or Recalculate Changes
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The system calls the quote header logic in pre-phase
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usually the header logic creates input fields on the header, but can also change the structure of the document
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The system sets the
dirtyflag for line items, either for all or only for the modified ones -
for each "dirty" item the system will
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call the quote item logic
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take the logic’s element results, and store it on the line item
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the system executes the header logic in post-phase
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usually the header logic calculates some summarized results and creates the result fields
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the user can see the recalculated results on the screen