+
+my $chart = $chart_class->new( 600 => 400 );
+$chart->set( pie_height => 60 ) if $chart_class eq 'GD::Graph::pie';
+my %font_config = RT->Config->Get('ChartFont');
+my $font = $font_config{ $session{CurrentUser}->UserObj->Lang || '' }
+ || $font_config{'others'};
+$chart->set_title_font( $font, 16 ) if $chart->can('set_title_font');
+$chart->set_legend_font( $font, 16 ) if $chart->can('set_legend_font');
+$chart->set_x_label_font( $font, 14 ) if $chart->can('set_x_label_font');
+$chart->set_y_label_font( $font, 14 ) if $chart->can('set_y_label_font');
+$chart->set_label_font( $font, 14 ) if $chart->can('set_label_font');
+$chart->set_x_axis_font( $font, 12 ) if $chart->can('set_x_axis_font');
+$chart->set_y_axis_font( $font, 12 ) if $chart->can('set_y_axis_font');
+$chart->set_values_font( $font, 12 ) if $chart->can('set_values_font');
+$chart->set_value_font( $font, 12 ) if $chart->can('set_value_font');
+
+# Pie charts don't like having no input, so we show a special image
+# that indicates an error message. Because this is used in an <img>
+# context, it can't be a simple error message. Without this check,
+# the chart will just be a non-loading image.
+if ($tix->Count == 0) {
+ my $plot = GD::Image->new(600 => 400);
+ $plot->colorAllocate(255, 255, 255); # background
+ my $black = $plot->colorAllocate(0, 0, 0);
+
+ require GD::Text::Wrap;
+ my $error = GD::Text::Wrap->new($plot,
+ color => $black,
+ text => loc("No tickets found."),
+ );
+ $error->set_font( $font, 16 );
+ $error->draw(0, 0);
+
+ $m->comp( 'SELF:Plot', plot => $plot, %ARGS );
+}
+
+if ($chart_class eq "GD::Graph::bars") {
+ my $count = keys %data;
+ $chart->set(
+ x_label => $tix->Label( $PrimaryGroupBy ),
+ y_label => loc('Tickets'),
+ show_values => 1,
+ x_label_position => 0.6,
+ y_label_position => 0.6,
+ values_space => -1,
+# use a top margin enough to display values over the top line if needed
+ t_margin => 18,
+# the following line to make sure there's enough space for values to show
+ y_max_value => 5*(int($max_value/5) + 2),
+# if there're too many bars or at least one key is too long, use vertical
+ x_labels_vertical => ( $count * $max_key_length > 60 ) ? 1 : 0,
+ $count > 30 ? ( bar_spacing => 1 ) : ( $count > 20 ? ( bar_spacing => 2 ) :
+ ( $count > 10 ? ( bar_spacing => 3 ) : ( bar_spacing => 5 ) )
+ ),
+ );
+}
+
+# refine values' colors, with both Color::Scheme's help and my own tweak
+$chart->{dclrs} = [
+ '66cc66', 'ff6666', 'ffcc66', '663399',
+ '3333cc', '339933', '993333', '996633',
+ '33cc33', 'cc3333', 'cc9933', '6633cc',
+];
+
+{
+ no warnings 'redefine';
+ *GD::Graph::pick_data_clr = sub {
+ my $self = shift;
+ my $color_hex = $self->{dclrs}[ $_[0] % @{ $self->{dclrs} } - 1 ];
+ return map { hex } ( $color_hex =~ /(..)(..)(..)/ );
+ };
+}
+