+require File.dirname(__FILE__) + '/base'
+
+##
+# Graph with individual horizontal bars instead of vertical bars.
+
+class Gruff::SideBar < Gruff::Base
+
+ def draw
+ @has_left_labels = true
+ super
+
+ return unless @has_data
+
+ # Setup spacing.
+ #
+ # Columns sit stacked.
+ spacing_factor = 0.9
+
+ @bar_width = @graph_height / @column_count.to_f
+ @d = @d.stroke_opacity 0.0
+ height = Array.new(@column_count, 0)
+ length = Array.new(@column_count, @graph_left)
+
+ @norm_data.each_with_index do |data_row, row_index|
+ @d = @d.fill data_row[DATA_COLOR_INDEX]
+
+ data_row[1].each_with_index do |data_point, point_index|
+
+ # Using the original calcs from the stacked bar chart
+ # to get the difference between
+ # part of the bart chart we wish to stack.
+ temp1 = @graph_left + (@graph_width -
+ data_point * @graph_width -
+ height[point_index]) + 1
+ temp2 = @graph_left + @graph_width - height[point_index] - 1
+ difference = temp2 - temp1
+
+ left_x = length[point_index] #+ 1
+ left_y = @graph_top + (@bar_width * point_index)
+ right_x = left_x + difference
+ right_y = left_y + @bar_width * spacing_factor
+
+ length[point_index] += difference
+ height[point_index] += (data_point * @graph_width - 2)
+
+ @d = @d.rectangle(left_x, left_y, right_x, right_y)
+
+ # Calculate center based on bar_width and current row
+ label_center = @graph_top + (@bar_width * point_index) + (@bar_width * spacing_factor / 2.0)
+ draw_label(label_center, point_index)
+ end
+
+ end
+
+ @d.draw(@base_image)
+ end
+
+protected
+
+ # Instead of base class version, draws vertical background lines and label
+ def draw_line_markers
+
+ return if @hide_line_markers
+
+ @d = @d.stroke_antialias false
+
+ # Draw horizontal line markers and annotate with numbers
+ @d = @d.stroke(@marker_color)
+ @d = @d.stroke_width 1
+ number_of_lines = 5
+
+ # TODO Round maximum marker value to a round number like 100, 0.1, 0.5, etc.
+ increment = significant(@maximum_value.to_f / number_of_lines)
+ (0..number_of_lines).each do |index|
+
+ line_diff = (@graph_right - @graph_left) / number_of_lines
+ x = @graph_right - (line_diff * index) - 1
+ @d = @d.line(x, @graph_bottom, x, @graph_top)
+ diff = index - number_of_lines
+ marker_label = diff.abs * increment
+
+ unless @hide_line_numbers
+ @d.fill = @font_color
+ @d.font = @font if @font
+ @d.stroke = 'transparent'
+ @d.pointsize = scale_fontsize(@marker_font_size)
+ @d.gravity = CenterGravity
+ # TODO Center text over line
+ @d = @d.annotate_scaled( @base_image,
+ 0, 0, # Width of box to draw text in
+ x, @graph_bottom + (LABEL_MARGIN * 2.0), # Coordinates of text
+ marker_label.to_s, @scale)
+ end # unless
+ @d = @d.stroke_antialias true
+ end
+ end
+
+ ##
+ # Draw on the Y axis instead of the X
+
+ def draw_label(y_offset, index)
+ if !@labels[index].nil? && @labels_seen[index].nil?
+ @d.fill = @font_color
+ @d.font = @font if @font
+ @d.stroke = 'transparent'
+ @d.font_weight = NormalWeight
+ @d.pointsize = scale_fontsize(@marker_font_size)
+ @d.gravity = EastGravity
+ @d = @d.annotate_scaled(@base_image,
+ 1, 1,
+ -@graph_left + LABEL_MARGIN * 2.0, y_offset,
+ @labels[index], @scale)
+ @labels_seen[index] = 1
+ end
+ end
+
+end