是的,有一种方法可以在Praw中创建领导者点效果。
如果你有:
space_for_dots = 1. - 2. - 3.
dots = (space_for_dots / 4) * '.'
toc_entry = entry_string + dots + entry_page_number
要计算prawn中字符串的宽度,可以使用compute_width_of,它是字体类的一部分。
您添加的图片的示例可能如下所示:
def build_toc_entry(left_text, right_text, available_width, text_size)
left_text_width = font(YOUR_FONT).compute_width_of(left_text, size: text_size)
right_text_width = font(YOUR_FONT).compute_width_of(right_text, size: text_size)
dot_width = font(YOUR_FONT).compute_width_of('.', size: text_size)
space_width = font(YOUR_FONT).compute_width_of(' ', size: text_size)
space_for_dots = available_width - left_text_width - right_text_width - space_width * 2
dots = '.' * (space_for_dots / dot_width)
"#{left_text} #{dots} #{right_text}" # return the finished toc entry
end
text 'Locate the information on the page indicated.'
text build_toc_entry('Leader Dots', '3', 350, 8)
text build_toc_entry('Dingbats', '5', 350, 8)
text build_toc_entry('Bullets', '8', 350, 8)
这有点晚了但是我这样做是为了让点与左侧文本正确对齐。但我认为修改左右文本会相当容易:
def build_dots(text, available_width, text_size)
dots_hash = {}
current_font = font.inspect.split('<')[1].split(':')[0].strip
text_width = font(current_font).compute_width_of(text, size: text_size)
dot_width = font(current_font).compute_width_of('.', size: text_size)
space_width = font(current_font).compute_width_of(' ', size: text_size)
space_for_dots = available_width - text_width - space_width * 2
dots = '.' * (space_for_dots / dot_width)
dots_width = font(current_font).compute_width_of(dots, size: text_size)
dots_start = available_width - dots_width - (space_width * 2)
dots_hash[:dots] = dots
dots_hash[:position] = dots_start
return dots_hash
end
dot_values = build_dots(officer.title,150,text_size)
p = 0
float {
text "#{officer.title}", size: text_size
}
indent(dot_values[:position]) do
float {
text dot_values[:dots], size: text_size
}
end
p += 150
indent(p,0) do
text "#{officer.name}", size: text_size
end