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require "rghost/ps_object"
require "rghost/point"
# Creates straight lines
class RGhost::Line < RGhost::PsObject
DEFAULT_POINT = {x: :limit_left, y: :current_row}
# Draw line the one pont until another, the first point is creates by moveto and de last point using the method lineto.
#===Examples
# doc=Document.new
# doc.moveto :x => 2, :y => 3
# doc.lineto :x => 5, :y => 2
#
# link:images/line01.png
#
# doc=Document.new
# doc.moveto :x => 2, :y => 3
# doc.lineto :x => 4, :y => 4
#
# link:images/line02.png
#
# doc=Document.new
# doc.border :color => '#AAFA49', :width => 4
# doc.moveto :x => 2, :y => 3
# doc.lineto :x => 4, :y => 1
#
# link:images/line03.png
#
# doc=Document.new
# doc.border :color => '#49AAFA', :width => 1
# doc.moveto :x => 2, :y => 3
# doc.lineto :x => 4, :y => 1
# doc.moveto :x => 2, :y => 3
# doc.lineto :x => 2, :y => 1
#
# link:images/line04.png
#
# Using graphic state to close path shape
#
# doc=Document.new
# doc.graphic do
# doc.border :color => '#49AAFA', :width => 1
# doc.moveto :x => 2, :y => 3
# doc.lineto :x => 4, :y => 1
# doc.lineto :x => 2, :y => 1
# doc.shape_content :color => "#F0FFFF"
# doc.closepath
# end
#
# link:images/line05.png
def self.lineto(point = {})
RGhost::Line.make_command(:lineto, point)
end
# (Relative lineto) Draw straingh line in the same manner as lineto, but from current point to distance for next :x and :y. That is, rlineto constructs a line from (x, y) to (x + dx, y + dy) and makes (x + dx, y + dy) the new current point.
#
#===Examples
# doc=Document.new
# doc.moveto :x => 2, :y => 1
# doc.rlineto :x => 3, :y => 2
#
# link:images/line06.png
#
# doc=Document.new
# doc.moveto :x => 2, :y => 1
# doc.rlineto :x => 3, :y => 2
# doc.rlineto :x => 0, :y => -2
# link:images/line07.png
def self.rlineto(point = {})
line = RGhost::Line.make_command(:rlineto, point)
end
private
def self.make_command(command, point = {})
p = DEFAULT_POINT.dup.merge(point)
p = RGhost::Point.new(p[:x], p[:y])
RGhost::PsObject.new "#{p.ps}#{command}"
end
end
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