lib/gruff/pie.rb in gruff-0.2.6 vs lib/gruff/pie.rb in gruff-0.2.7

@@ -3,10 +3,19 @@
 
 class Gruff::Pie < Gruff::Base
 
   TEXT_OFFSET_PERCENTAGE = 0.15
 
+  # Can be used to make the pie start cutting slices at the top (-90.0)
+  # or at another angle. Default is 0.0, which starts at 3 o'clock.
+  attr_accessor :zero_degree
+  
+  def initialize_ivars
+    super
+    @zero_degree = 0.0
+  end
+
   def draw
     @hide_line_markers = true
     
     super
 
@@ -16,11 +25,11 @@
     radius = ([@graph_width, @graph_height].min / 2.0) * 0.8
     top_x = @graph_left + (@graph_width - diameter) / 2.0
     center_x = @graph_left + (@graph_width / 2.0)
     center_y = @graph_top + (@graph_height / 2.0) - 10 # Move graph up a bit
     total_sum = sums_for_pie()
-    prev_degrees = 0.0
+    prev_degrees = @zero_degree
 
     # Use full data since we can easily calculate percentages
     @data.sort{ |a, b| a[DATA_VALUES_INDEX][0] <=> b[DATA_VALUES_INDEX][0] }.each do |data_row|
       if data_row[DATA_VALUES_INDEX][0] > 0
         @d = @d.stroke data_row[DATA_COLOR_INDEX]
@@ -59,14 +68,14 @@
   ##
   # Labels are drawn around a slightly wider ellipse to give room for 
   # labels on the left and right.
   def draw_label(center_x, center_y, angle, radius, amount)
     # TODO Don't use so many hard-coded numbers
-    r_offset = 5.0      # The distance out from the center of the pie to get point
+    r_offset = 20.0      # The distance out from the center of the pie to get point
     x_offset = center_x # + 15.0 # The label points need to be tweaked slightly
     y_offset = center_y  # This one doesn't though
     radius_offset = (radius + r_offset)
-    ellipse_factor = radius_offset * 0.10
+    ellipse_factor = radius_offset * 0.15
     x = x_offset + ((radius_offset + ellipse_factor) * Math.cos(angle.deg2rad))
     y = y_offset + (radius_offset * Math.sin(angle.deg2rad))
     
     # Draw label
     @d.fill = @font_color