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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Alexander Adolf From: Alexander Adolf via "General discussions about Org-mode." Errors-To: emacs-orgmode-bounces+larch=yhetil.org@gnu.org Sender: emacs-orgmode-bounces+larch=yhetil.org@gnu.org X-Migadu-Flow: FLOW_IN X-Migadu-Country: US X-Migadu-Spam-Score: -3.97 X-Spam-Score: -3.97 X-Migadu-Queue-Id: C8F1771781 X-Migadu-Scanner: mx11.migadu.com X-TUID: Zp4KcsjR9Vq0 --=-=-= Content-Type: text/plain Ihor Radchenko writes: > [...] > I agree that the manual can be improved. It would be nice if someone > actively using column views contributed such an improvement ;) > [...] Ok, I've given it a try. --=-=-= Content-Type: text/x-patch Content-Disposition: inline; filename=0001-doc-org-manual.org-better-explain-columnview-column-.patch >From 4bb89a24269ee2ef42ed2b1c5713faa37b33f72d Mon Sep 17 00:00:00 2001 From: Alexander Adolf Date: Sat, 17 Aug 2024 18:29:51 +0200 Subject: [PATCH] doc/org-manual.org: better explain columnview column summary types * doc/org-manual.org (Column attributes): Shed more words on how summary types for columnview columns work, which property values are taken into account, and which property values get updated in the buffer under what circumstances. --- doc/org-manual.org | 39 +++++++++++++++++++++++++++++++++++---- etc/ORG-NEWS | 6 ++++++ 2 files changed, 41 insertions(+), 4 deletions(-) diff --git a/doc/org-manual.org b/doc/org-manual.org index 6cf51ebca..b435a4526 100644 --- a/doc/org-manual.org +++ b/doc/org-manual.org @@ -5734,10 +5734,8 @@ optional. The individual parts have the following meaning: - {{{var(SUMMARY-TYPE)}}} :: - The summary type. If specified, the column values for parent nodes - are computed from the children[fn:: If more than one summary type - applies to the same property, the parent values are computed - according to the first of them.]. + The summary type. If specified, the column and property values for + ancestor nodes are computed from their descendants. Supported summary types are: @@ -5810,6 +5808,39 @@ children have been checked. The =CLOCKSUM= and =CLOCKSUM_T= columns are special, they list the sums of CLOCK intervals in the subtree, either for all clocks or just for today. +When using summary types for non-special properties like the +=Time_Estimate= column in the example, the collection of data for the +summary in each subtree within scope will start at the furthest +descendant nodes which have the respective property. When any of +their sibling nodes also have the property in question, all the +siblings' values of the property are used to compute the summary +result according to the summary type specified. Then the closest +ancestor node which also has the respective property is located, and +the buffer is modified as the value of that node's property is updated +with the summary result of its descendant nodes. This process is +repeated starting from each updated node, until the top of each +subtree has been reached, and all branches of the subtree have been +traversed. Since the property values of ancestor nodes get updated in +this process, only the furthest descendant nodes which have the +respective property along each subtree axis will contribute to the +summary results. + +When a non-special property appears more than once in a columns +definition, and with different summary type specifications (including +with none), the values of that property present on any ancestor nodes +will be updated according to the summary type specification (if any) +of the first instance of the property in the columns definition. +Hence, when the first occurrence of a property in a columns definition +has no summary type specification, the property values of ancestor +nodes will not be updated. + +When using summary types with columns for the special properties +=CLOCKSUM= and =CLOCKSUM_T=, the summary process will be different. +First, as these are special properties that are not stored in property +drawers, no updates will be made to any nodes involved. Secondly, the +summary value will be computed not just from the furthest descendant +nodes, but from the special property values of all nodes in a subtree. + *** Using column view :PROPERTIES: :DESCRIPTION: How to create and use column view. diff --git a/etc/ORG-NEWS b/etc/ORG-NEWS index 6f858f3ca..3e81f0f46 100644 --- a/etc/ORG-NEWS +++ b/etc/ORG-NEWS @@ -187,6 +187,12 @@ This way, attachments will remain accessible when opening symlinked Org file. When no attach dir exists, Org mode will still prefer creating it in the "default" directory - where the symlink is located. +*** improved description of how summary types in column definitions for columnview work + +Made the manual more explicit about how summary types work for +non-special and special properties, and when which property's value +gets updated in the buffer when a columnview is updated. + * Version 9.7 ** Important announcements and breaking changes -- 2.39.3 (Apple Git-146) --=-=-=--