def draw_legend
return if @hide_legend
@legend_labels = @data.collect {|item| item[DATA_LABEL_INDEX] }
legend_square_width = @legend_box_size
@d.font = @font if @font
@d.pointsize = @legend_font_size
metrics = @d.get_type_metrics(@base_image, @legend_labels.join(''))
legend_text_width = metrics.width
legend_width = legend_text_width +
(@legend_labels.length * legend_square_width * 2.7)
legend_left = (@raw_columns - legend_width) / 2
legend_increment = legend_width / @legend_labels.length.to_f
current_x_offset = legend_left
current_y_offset = @hide_title ?
TOP_MARGIN + LEGEND_MARGIN :
TOP_MARGIN +
TITLE_MARGIN + @title_caps_height +
LEGEND_MARGIN
debug { @d.line 0.0, current_y_offset, @raw_columns, current_y_offset }
@legend_labels.each_with_index do |legend_label, index|
@d.fill = @font_color
@d.font = @font if @font
@d.pointsize = scale_fontsize(@legend_font_size)
@d.stroke('transparent')
@d.font_weight = NormalWeight
@d.gravity = WestGravity
@d = @d.annotate_scaled( @base_image,
@raw_columns, 1.0,
current_x_offset + (legend_square_width * 1.7), current_y_offset,
legend_label.to_s, @scale)
@d = @d.stroke('transparent')
@d = @d.fill @data[index][DATA_COLOR_INDEX]
@d = @d.rectangle(current_x_offset,
current_y_offset - legend_square_width / 2.0,
current_x_offset + legend_square_width,
current_y_offset + legend_square_width / 2.0)
@d.pointsize = @legend_font_size
metrics = @d.get_type_metrics(@base_image, legend_label.to_s)
current_string_offset = metrics.width + (legend_square_width * 2.7)
current_x_offset += current_string_offset
end
@color_index = 0
end