Add an option for the notification position. Update documentation.

README.md

@@ -8,14 +8,26 @@ cd ~/.config/awesome
 git clone https://github.com/lmanul/awesome-workspace-grid.git
 ```
 
+Arguments to pass to the contructor (all of them are optional):
+
+| Arg        | Default        | Description |
+----------------------------------
+| `rows`     | 2              | Number of rows (1 to 9) |
+| `columns`  | 3              | Number of columns (1 to 9) |
+| `position` | `"top_middle"` | Notification position on the screen |
+| `visual`   | `true`         | Whether to show workspace changes |
+----------------------------------
+
+Please make sure that `rows` × `columns` is equal to your number of tags, as
+defined by the call to `awful.tag()` in your configuration.
+
 Sample usage in `rc.lua`:
 
 ```
 local workspace_grid = require("awesome-workspace-grid")
 grid = workspace_grid({
-  rows = 2,        -- supported: 1 to 9
-  columns = 3,     -- supported: 1 to 9
-  visual = true,   -- whether to show workspace changes
+  rows = 3,
+  columns = 3,
 })
 
 -- Insert after 'globalkeys' is defined but before it is passed to 'root':

awesome-workspace-grid.lua

@@ -15,8 +15,10 @@ end
 function workspace_grid:init(args)
    self.rows = args.rows or 2
    self.columns = args.columns or 3
+   self.position = args.position or "top_middle"
+   self.visual = args.visual or true
 
-   if args.visual then
+   if self.visual then
       awful.screen.connect_for_each_screen(function(s)
             s.workspace_notification_id = nil
       end)
@@ -80,7 +82,7 @@ function workspace_grid:on_tag_selected(t)
             icon = script_path() .. icon_path,
             icon_size = 100,
             margin = 0,
-            position = "top_middle",
+            position = self.position,
             preset = naughty.config.presets.normal,
             replaces_id = s.workspace_notification_id,
             screen = i,