Always show tags with zero tasks.

'TagEmptyFilter' checks for the correct 'self.pane' values
and considers the newly introduced 'show_zero' field.

This fixes GitHub issue #1007

GTG/core/filters.py

@@ -42,19 +42,20 @@ def __init__(self, ds, pane):
         super(TagEmptyFilter, self).__init__()
         self.ds = ds
         self.pane = pane
+        self.show_zero = True
 
 
     def do_match(self, item) -> bool:
         tag = unwrap(item, Tag)
 
-        if self.pane == 'open':
-            return tag.task_count_open > 0
+        if self.pane == 'open_view':
+            return self.show_zero or tag.task_count_open > 0
 
-        elif self.pane == 'closed':
-            return tag.task_count_closed > 0
+        elif self.pane == 'closed_view':
+            return self.show_zero or tag.task_count_closed > 0
 
-        elif self.pane == 'workview':
-            return tag.task_count_actionable > 0 and tag.actionable
+        elif self.pane == 'actionable_view':
+            return (self.show_zero or tag.task_count_actionable > 0) and tag.actionable
 
         else:
             return True

GTG/gtk/browser/sidebar.py

@@ -146,7 +146,7 @@ def __init__(self, app, ds: Datastore, browser):
         # -------------------------------------------------------------------------------
         # Tags Section
         # -------------------------------------------------------------------------------
-        self.tags_filter = TagEmptyFilter(ds, 'open')
+        self.tags_filter = TagEmptyFilter(ds, 'open_view')
         self.filtered_tags = Gtk.FilterListModel()
         self.filtered_tags.set_model(ds.tags.tree_model)
         self.filtered_tags.set_filter(self.tags_filter)