Merge pull request #557 from normanjaeckel/ExpandTreeByDefault

Added option to DraggableMPTTAdmin to expand the tree on first page visit

docs/admin.rst

@@ -103,6 +103,11 @@ see below.)
 ``list_per_page`` is set to 2000 by default (which effectively disables
 pagination for most trees).
 
+You may set the attribute ``expand_tree_by_default = True`` in your
+DraggableMPTTAdmin to expand the tree on first page visit (default is
+False). After this the state of every node (expanded or collapsed) is saved
+to the browser storage.
+
 
 Replacing ``indented_title``
 ----------------------------

mptt/admin.py

@@ -154,6 +154,7 @@ class DraggableMPTTAdmin(MPTTModelAdmin):
     list_display = ('tree_actions', 'indented_title')  # Sane defaults.
     list_display_links = ('indented_title',)  # Sane defaults.
     mptt_level_indent = 20
+    expand_tree_by_default = False
 
     def tree_actions(self, item):
         try:
@@ -256,6 +257,7 @@ def _tree_context(self, request):
                 'collapseTree': _('Collapse tree'),
                 'expandTree': _('Expand tree'),
             },
+            'expandTreeByDefault': self.expand_tree_by_default,
         }
 
     def _build_tree_structure(self, queryset):

mptt/static/mptt/draggable-admin.js

@@ -402,7 +402,9 @@ django.jQuery(function($){
                 expandOrCollapseNode(treeNode(storedNodes[i]));
             }
         } else {
-            collapseTree();
+            if (!DraggableMPTTAdmin.expandTreeByDefault) {
+                collapseTree();
+            }
         }
     }