Clean up AncestorTree report.

svn: r11796

src/plugins/drawreport/AncestorTree.py

@@ -41,8 +41,8 @@ from gen.plug import PluginManager
 from gen.plug.menu import BooleanOption, NumberOption, TextOption, PersonOption
 from ReportBase import Report, ReportUtils, CATEGORY_DRAW, MenuReportOptions
 from BasicUtils import name_displayer
+
 pt2cm = ReportUtils.pt2cm
-cm2pt = ReportUtils.cm2pt
 
 #------------------------------------------------------------------------
 #
@@ -58,6 +58,9 @@ _DIED = _('short for died|d.')
 #
 #------------------------------------------------------------------------
 def log2(val):
+    """
+    Calculate the log base 2 of a value.
+    """
     return int(math.log10(val)/math.log10(2))
 
 #------------------------------------------------------------------------
@@ -137,7 +140,7 @@ class GenChart:
                 x = 0
                 for entry in i:
                     new_map[entry] = (new_y, x)
-                    x =+ 1
+                    x += 1
                 new_y += 1
         self.array = new_array
         self.map = new_map
@@ -332,7 +335,8 @@ class AncestorTree(Report):
         self.delta = pt2cm(self.box_pad_pts) + self.box_width + 0.2
         if not self.force_fit:
             calc_width = self.box_width + 0.2 + pt2cm(self.box_pad_pts)
-            remain = self.doc.get_usable_width() - ((self.generations_per_page)*calc_width)
+            remain = self.doc.get_usable_width() -                             \
+                     ((self.generations_per_page)*calc_width)
             self.delta += remain / (self.generations_per_page)
             
     def scale_styles(self):
@@ -363,12 +367,15 @@ class AncestorTree(Report):
                     if self.genchart.get_xy(x, y) != 0:
                         blank = False
                         break
-                if not blank: break
-            if blank: return
+                if not blank: 
+                    break
+            if blank: 
+                return
 
         self.doc.start_page()
         if self.title and self.force_fit:
-            self.doc.center_text('AC2-title',self.title,self.doc.get_usable_width()/2,0)
+            self.doc.center_text('AC2-title', self.title, 
+                                 self.doc.get_usable_width() / 2, 0)
         phys_y = 0
         for y in range(starty, stopy):
             phys_x = 0