Jiri Bajer wrote: > Hi, > > I am writing an editor for multi-columned hierarchical data (for example > project tasks or software requirements) and would like to allow the user > to sort the rows as if the data had a flat structure. > > Example TreeView: > > Hierarchy | Task name | Priority | Man-days > ----------+-----------+------------+--------- > >> 1 | Task 1 | High | 5 >> > 1.1 | Subtask 1 | High | 3 > 1.2 | Subtask 2 | Low | 2 > 2 | Task 2 | High | 1 > > Now I would like to sort all the project tasks and subtasks by priority. > > If I store the data in a TreeModel, wrap a TreeModelSort over it and > display the result via TreeView, the sorting mechanism is not able to > put "Task 2" before "Task 1.2" even if "Task 2" has higher priority. It > is caused by respecting the hierarchy - sorting won't break a child from > its parent (but I need to do so). > > Required result: > > Hierarchy | Task name | Priority v | Man-days > ----------+-----------+------------+--------- > 1 | Task 1 | High | 5 > 1.1 | Subtask 1 | High | 3 > 2 | Task 2 | High | 1 > 1.2 | Subtask 2 | Low | 2 <--- breaks the hierarchy > > Is there any way how to achieve such sorting without maintaining two > copies of all data - one in TreeStore and one in ListStore and > sorting/displaying the ListStore instead? > > I was able to hide the expanders via setting the expander column to a > hidden one so the view part seems to be OK. > > I don't think TreeSortable.set_sort_func() would help here as the > comparison works but the rows to be compared are chosen only from one > parent and within the same tree depth (i.e. 1.1 is compared only with > 1.2 but not with 1 or 2). > > Maybe I could write a wrapper providing a ListStore-like behavior while > having no own data but taking them from a TreeStore + put this ListStore > in its own TreeView? Or inheriting from a plain ListStore and implement > "child" collapse/expand on my own? > > Any ideas are welcome, thanks! > Look at the TreeModelFilter. With the right set_modify_func() function you may be able to massage the look for your purposes.
John _______________________________________________ pygtk mailing list pygtk@daa.com.au http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://faq.pygtk.org/
