Subject: | Pie chart incorrectly use text width to calculate maximum height |

Chart::Pie takes the maximum of text width and height to calculate the
maximum allowed diameter of the pie. This leaves huge vertical margins
because obviously, text is usually much wider than it's height. The attached
patch does an independent calculation for the two values and only then takes
the minimum available space to calculate the diameter.

Subject: | chart_pie_min_height.diff |

--- Chart/Pie.pm 2009-10-16 13:26:57.548734365 +0200
+++ Chart/Pie.pm.new 2009-10-16 13:27:45.340736015 +0200
@@ -823,8 +823,10 @@
# always draw a circle, which means the diameter will be the smaller
# of the width and height. let enougth space for the labels
- my $labeldistance = 2*$self->maximum($fontW,$fontH);
- $diameter = $self->minimum($width,$height) - 2*$max_label_len - $labeldistance;
+ my $min_width = $width - 2 * $max_label_len - 2 * $fontW;
+ my $min_height = $height - 2 * $fontH;
+ $diameter = $self->minimum($min_width, $min_height);
+ my $labeldistance = 2 * $self->maximum($fontW,$fontH);
# make sure, that we have a positive diameter
if ($diameter < 0)