Class: AGL::TextHelper

Inherits:
Object
  • Object
show all
Defined in:
lib/minigl/text.rb

Instance Method Summary collapse

Constructor Details

#initialize(font, line_spacing = 0) ⇒ TextHelper 



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# File 'lib/minigl/text.rb', line 3

def initialize font, line_spacing = 0
  @font = font
  @line_spacing = line_spacing
end

Instance Method Details

#write_breaking(text, x, y, width, mode = :left, color = 0xffffffff) ⇒ Object 



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# File 'lib/minigl/text.rb', line 19

def write_breaking text, x, y, width, mode = :left, color = 0xffffffff
  text.split("\n").each do |p|
    if mode == :justified
      y = write_paragraph_justified p, x, y, width, color
    else
      rel =
        case mode
        when :left then 0
        when :center then 0.5
        when :right then 1
        else 0
        end
      y = write_paragraph p, x, y, width, rel, color
    end
  end
end

#write_line(text, x, y, mode = :left, color = 0xffffffff) ⇒ Object 



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# File 'lib/minigl/text.rb', line 8

def write_line text, x, y, mode = :left, color = 0xffffffff
  rel =
    case mode
    when :left then 0
    when :center then 0.5
    when :right then 1
    else 0
    end
  @font.draw_rel text, x, y, 0, rel, 0, 1, 1, color
end

#write_paragraph(text, x, y, width, rel, color) ⇒ Object 



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# File 'lib/minigl/text.rb', line 36

def write_paragraph text, x, y, width, rel, color
  line = ""
  line_width = 0
  text.split(' ').each do |word|
    w = @font.text_width word
    if line_width + w > width
      @font.draw_rel line.chop, x, y, 0, rel, 0, 1, 1, color
      line = ""
      line_width = 0
      y += @font.height + @line_spacing
    end
    line += "#{word} "
    line_width += @font.text_width "#{word} "
  end
  @font.draw_rel line.chop, x, y, 0, rel, 0, 1, 1, color if not line.empty?
  y + @font.height + @line_spacing
end

#write_paragraph_justified(text, x, y, width, color) ⇒ Object 



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# File 'lib/minigl/text.rb', line 54

def write_paragraph_justified text, x, y, width, color
  space_width = @font.text_width " "
  spaces = [[]]
  line_index = 0
  new_x = x
  words = text.split(' ')
  words.each do |word|
    w = @font.text_width word
    if new_x + w > x + width
      space = x + width - new_x + space_width
      index = 0
      while space > 0
        spaces[line_index][index] += 1
        space -= 1
        index += 1
        index = 0 if index == spaces[line_index].size - 1
      end
    
      spaces << []
      line_index += 1
    
      new_x = x
    end
    new_x += @font.text_width(word) + space_width
    spaces[line_index] << space_width
  end

  index = 0
  spaces.each do |line|
    new_x = x
    line.each do |s|
      @font.draw words[index], new_x, y, 0, 1, 1, color
      new_x += @font.text_width(words[index]) + s
      index += 1
    end
    y += @font.height + @line_spacing
  end
  y
end