Shortcuts to rate/reject all images within a group

contrib/rate_group.lua

@@ -0,0 +1,84 @@
+--[[
+
+  Rate Group:
+
+  Script to provide shortcuts for rating or rejecting all images within a group;
+  particularly useful for RAW+JPEG shooters employing a star rating workflow
+  like the below:
+
+    http://blog.chasejarvis.com/blog/2011/03/photo-editing-101/
+
+
+  Installation and usage:
+
+    1. Copy this file into ~/.config/darktable/lua/
+
+    2. Add `require "rate_group"` to new line in ~/.config/darktable/luarc
+
+    3. Restart darktable
+
+    4. Assign a keyboard shortcut to each action via settings > shortcuts > lua
+
+       I use the following shortcuts:
+
+       * Reject group: Ctrl+R
+       * Rate group 1: Ctrl+1
+       * Rate group 2: Ctrl+2
+       * Rate group 3: Ctrl+3
+       * Rate group 4: Ctrl+4
+       * Rate group 5: Ctrl+5
+       * Rate group 0: Ctrl+0
+
+
+  Author:  Dom H (dom@hxy.io)
+  License: GPLv2
+
+  This script is based on Thibault Jouannic's `reject_group` script:
+    http://redmine.darktable.org/issues/8968#note-20
+
+]]
+
+local dt = require "darktable"
+
+local function apply_rating(rating)
+  local images = dt.gui.action_images
+  for _, i in ipairs(images) do
+      local members = i:get_group_members()
+      for _, m in ipairs(members) do
+          m.rating = rating
+      end
+  end
+  if rating < 0 then
+      dt.print("rejecting group(s)")
+  else
+      dt.print("applying rating " ..rating.. " to group(s)")
+  end
+end
+
+dt.register_event("shortcut",function(event, shortcut)
+    apply_rating(-1)
+end, "Reject group")
+
+dt.register_event("shortcut",function(event, shortcut)
+    apply_rating(0)
+end, "Rate group 0")
+
+dt.register_event("shortcut",function(event, shortcut)
+    apply_rating(1)
+end, "Rate group 1")
+
+dt.register_event("shortcut",function(event, shortcut)
+    apply_rating(2)
+end, "Rate group 2")
+
+dt.register_event("shortcut",function(event, shortcut)
+    apply_rating(3)
+end, "Rate group 3")
+
+dt.register_event("shortcut",function(event, shortcut)
+    apply_rating(4)
+end, "Rate group 4")
+
+dt.register_event("shortcut",function(event, shortcut)
+    apply_rating(5)
+end, "Rate group 5")