From: John Wiegley <firstname.lastname@example.org> To: Carsten Dominik <email@example.com> Cc: emacs-orgmode Org-Mode <firstname.lastname@example.org> Subject: A much simpler way of handling dependent tasks Date: Mon, 26 Jan 2009 17:16:17 -0400 [thread overview] Message-ID: <B9150568-E659-4A3F-AFDE-535437A6EE21@newartisans.com> (raw) [-- Attachment #1: Type: text/plain, Size: 553 bytes --] I've been wanting a simple method for managing dependent tasks for some time now, and only now did it occur to me that I could just implement a much simpler method using your current blocking mechanism. The attached file, confusingly named org-depends.el, implements the following scheme: 1. Any TODO which has incomplete child TODOs is blocked. 2. If a parent TODO has the ORDERED property, it's children must be completed in order. Undone siblings block later siblings. 3. Blocked items are greyed out in the agenda list. John [-- Attachment #2: org-depends.el --] [-- Type: application/octet-stream, Size: 4353 bytes --] ;;; org-depends.el --- Hierarchical TODO dependencies for Org-mode ;; Copyright (C) 2008 Free Software Foundation, Inc. ;; ;; Author: John Wiegley <johnw at newartisans dot com> ;; Keywords: outlines, hypermedia, calendar, wp ;; Homepage: http://www.newartisans.com/ ;; Version: 0.01 ;; ;; This file is not part of GNU Emacs. ;; ;; This file is free software; you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation; either version 3, or (at your option) ;; any later version. ;; GNU Emacs is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with GNU Emacs; see the file COPYING. If not, write to the ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, ;; Boston, MA 02110-1301, USA. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;;; Commentary: ;; (require 'org) (defun org-depends-block-todo (change-plist) "Block turning an entry into a TODO. This checks whether the current task should be blocked from state changes. Such blocking occurs when: 1. The task has children which are not all in a completed state. 2. A task has a parent with the property :ORDERED:, and there are siblings prior to the current task with incomplete status." (catch 'dont-block ;; If this task has children, and any are undone, it's blocked (save-excursion (outline-back-to-heading) (let ((this-level (funcall outline-level))) (outline-next-heading) (let ((child-level (funcall outline-level))) (while (and (not (eobp)) (> child-level this-level)) ;; this todo has children, check whether they are all ;; completed (if (and (not (org-entry-is-done-p)) (org-entry-is-todo-p)) (throw 'dont-block nil)) (outline-next-heading) (setq child-level (funcall outline-level)))))) ;; Otherwise, if the task's parent has the :ORDERED: property, and ;; any previous siblings are undone, it's blocked (save-excursion (outline-back-to-heading) (when (save-excursion (outline-up-heading 1) (org-entry-get (point) "ORDERED")) (let* ((this-level (funcall outline-level)) (current-level this-level)) (while (and (not (bobp)) (= current-level this-level)) (outline-previous-heading) (setq current-level (funcall outline-level)) (if (= current-level this-level) ;; this todo has children, check whether they are all ;; completed (if (and (not (org-entry-is-done-p)) (org-entry-is-todo-p)) (throw 'dont-block nil))))))) t)) ; don't block (add-hook 'org-blocker-hook 'org-depends-block-todo) (defface org-depends-dimmed-todo-face '((((background light)) (:foreground "grey50")) (((background dark)) (:foreground "grey50"))) "Face used to hide leading stars in headlines. The foreground color of this face should be equal to the background color of the frame." :group 'org-depends) (defun org-depends-dim-blocked-todos () "Dim currently blocked TODO's in the agenda display." (interactive) (mapc (lambda (o) (if (eq (org-overlay-get o 'org-type) 'org-blocked-todo) (org-delete-overlay o))) (org-overlays-in (point-min) (point-max))) (save-excursion (let ((inhibit-read-only t) b e p ov h l) (goto-char (point-min)) (while (let ((pos (next-single-property-change (point) 'todo-state))) (and pos (goto-char (1+ pos)))) (let ((marker (get-text-property (point) 'org-hd-marker))) (when (and marker (not (with-current-buffer (marker-buffer marker) (save-excursion (goto-char marker) (org-depends-block-todo (list :type 'todo-state-change :position marker :from "TODO" :to "DONE")))))) (setq b (point) e (point-at-eol) ov (org-make-overlay b e)) (org-overlay-put ov 'face 'org-depends-dimmed-todo-face) (org-overlay-put ov 'org-type 'org-blocked-todo))))))) (add-hook 'org-finalize-agenda-hook 'org-depends-dim-blocked-todos) (provide 'org-depends) ;;; org-depends.el ends here [-- Attachment #3: Type: text/plain, Size: 1 bytes --] [-- Attachment #4: Type: text/plain, Size: 204 bytes --] _______________________________________________ Emacs-orgmode mailing list Remember: use `Reply All' to send replies to the list. 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next reply other threads:[~2009-01-26 21:16 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2009-01-26 21:16 John Wiegley [this message] 2009-01-26 23:48 ` Oliver Charles 2009-01-27 1:18 ` Jesse Alama 2009-01-27 6:46 ` Carsten Dominik 2009-01-27 6:47 ` John Wiegley 2009-01-27 6:47 ` Carsten Dominik 2009-01-27 7:31 ` John Wiegley 2009-01-27 7:43 ` Carsten Dominik 2009-01-27 22:51 ` Mike Newman 2009-01-30 15:02 ` Rainer Stengele 2009-01-30 17:37 ` Carsten Dominik 2009-01-30 20:07 ` John Wiegley
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