Draw the legend beneath the existing graph.
# File lib/gruff/mini/legend.rb, line 21 21: def draw_vertical_legend 22: return if @hide_mini_legend 23: 24: @legend_labels = @data.collect {|item| item[Gruff::Base::DATA_LABEL_INDEX] } 25: 26: legend_square_width = 40.0 # small square with color of this item 27: legend_square_margin = 10.0 28: @legend_left_margin = 100.0 29: legend_top_margin = 40.0 30: 31: # May fix legend drawing problem at small sizes 32: @d.font = @font if @font 33: @d.pointsize = @legend_font_size 34: 35: current_x_offset = @legend_left_margin 36: current_y_offset = @original_rows + legend_top_margin 37: 38: debug { @d.line 0.0, current_y_offset, @raw_columns, current_y_offset } 39: 40: @legend_labels.each_with_index do |legend_label, index| 41: 42: # Draw label 43: @d.fill = @font_color 44: @d.font = @font if @font 45: @d.pointsize = scale_fontsize(@legend_font_size) 46: @d.stroke = 'transparent' 47: @d.font_weight = Magick::NormalWeight 48: @d.gravity = Magick::WestGravity 49: @d = @d.annotate_scaled( @base_image, 50: @raw_columns, 1.0, 51: current_x_offset + (legend_square_width * 1.7), current_y_offset, 52: truncate_legend_label(legend_label), @scale) 53: 54: # Now draw box with color of this dataset 55: @d = @d.stroke 'transparent' 56: @d = @d.fill @data[index][Gruff::Base::DATA_COLOR_INDEX] 57: @d = @d.rectangle(current_x_offset, 58: current_y_offset - legend_square_width / 2.0, 59: current_x_offset + legend_square_width, 60: current_y_offset + legend_square_width / 2.0) 61: 62: current_y_offset += calculate_caps_height(@legend_font_size) * 1.7 63: end 64: @color_index = 0 65: end
The canvas needs to be bigger so we can put the legend beneath it.
# File lib/gruff/mini/legend.rb, line 10 10: def expand_canvas_for_vertical_legend 11: return if @hide_mini_legend 12: 13: @original_rows = @raw_rows 14: @rows += @data.length * calculate_caps_height(scale_fontsize(@legend_font_size)) * 1.7 15: render_background 16: end
Shorten long labels so they will fit on the canvas.
Department of Hu...
# File lib/gruff/mini/legend.rb, line 72 72: def truncate_legend_label(label) 73: truncated_label = label.to_s 74: while calculate_width(scale_fontsize(@legend_font_size), truncated_label) > (@columns - @legend_left_margin - @right_margin) && (truncated_label.length > 1) 75: truncated_label = truncated_label[0..truncated_label.length-2] 76: end 77: truncated_label + (truncated_label.length < label.to_s.length ? "..." : '') 78: end
Disabled; run with --debug to generate this.
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