Minor enhancements and fixes for GenealogyTree[gramps50] (#184)

* GenealogyTree: Correctly handle max_up

If there is more data than the user wants to export (specified by
the 'max_up' parameter), correctly emit a termination node instead
of omitting the last level. The check is analogous to the case in
subgraph_down.

* GenealogyTree: Add option to exclude siblings of ancestors

This reduces some space problems for sandclock reports.

* GenealogyTree: Allow no generations up or down

This makes sense for Sandclock reports to end immediately above /
below the center person / family.

Author: hahnjo

GenealogyTree/gt_sandclock.py

@@ -77,6 +77,7 @@ def __init__(self, database, options, user):
         self._pid = get_value('pid')
         self.max_up = menu.get_option_by_name('genup').get_value()
         self.max_down = menu.get_option_by_name('gendown').get_value()
+        self.include_siblings = menu.get_option_by_name('siblings').get_value()
         self.include_images = menu.get_option_by_name('images').get_value()
 
     def write_report(self):
@@ -137,7 +138,7 @@ def subgraph_up_parents(self, level, family):
             if handle:
                 parent = self._db.get_person_from_handle(handle)
                 family_handle = parent.get_main_parents_family_handle()
-                if family_handle:
+                if family_handle and level < self.max_up:
                     self.subgraph_up(level+1, 'parent', family_handle,
                                      handle)
                 else:
@@ -154,7 +155,7 @@ def subgraph_up(self, level, subgraph_type, family_handle, ghandle):
             if childref.ref == ghandle:
                 if subgraph_type != 'sandclock':
                     self.doc.write_node(self._db, level+1, 'g', child, True)
-            else:
+            elif self.include_siblings:
                 self.doc.write_node(self._db, level+1, 'c', child, False)
 
         if self._person_report and subgraph_type == 'sandclock':
@@ -222,14 +223,18 @@ def add_menu_options(self, menu):
             self.__pid.set_help(_("The center family for the report"))
             menu.add_option(category_name, "pid", self.__pid)
 
-        genup = NumberOption(_("Generations up"), 10, 1, 100)
+        genup = NumberOption(_("Generations up"), 10, 0, 100)
         genup.set_help(_("The number of generations to include in the tree"))
         menu.add_option(category_name, "genup", genup)
 
-        gendown = NumberOption(_("Generations down"), 10, 1, 100)
+        gendown = NumberOption(_("Generations down"), 10, 0, 100)
         gendown.set_help(_("The number of generations to include in the tree"))
         menu.add_option(category_name, "gendown", gendown)
 
+        siblings = BooleanOption(_("Include siblings"), True)
+        siblings.set_help(_("Include siblings of ancestors."))
+        menu.add_option(category_name, "siblings", siblings)
+
         images = BooleanOption(_("Include images"), False)
         images.set_help(_("Include images of people in the nodes."))
         menu.add_option(category_name, "images", images)