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module Axlsx
# This class details a single cell anchor for drawings.
# @note The recommended way to manage drawings, images and charts is Worksheet#add_chart or Worksheet#add_image.
# @see Worksheet#add_chart
# @see Worksheet#add_image
class OneCellAnchor
# A marker that defines the from cell anchor. The default from column and row are 0 and 0 respectively
# @return [Marker]
attr_reader :from
# The object this anchor hosts
# @return [Pic]
attr_reader :object
# The drawing that holds this anchor
# @return [Drawing]
attr_reader :drawing
# the width of the graphic object in pixels.
# this is converted to EMU at a 92 ppi resolution
# @return [Integer]
attr_reader :width
# the height of the graphic object in pixels
# this is converted to EMU at a 92 ppi resolution
# @return [Integer]
attr_reader :height
# Creates a new OneCellAnchor object and an Pic associated with it.
# @param [Drawing] drawing
# @option options [Array] start_at the col, row to start at
# @option options [Integer] width
# @option options [Integer] height
# @option options [String] image_src the file location of the image you will render
# @option options [String] name the name attribute for the rendered image
# @option options [String] descr the description of the image rendered
def initialize(drawing, options={})
@drawing = drawing
@width = 0
@height = 0
drawing.anchors << self
@from = Marker.new
options.each do |o|
self.send("#{o[0]}=", o[1]) if self.respond_to? "#{o[0]}="
end
@object = Pic.new(self, options)
end
# @see height
def height=(v) Axlsx::validate_unsigned_int(v); @height = v; end
# @see width
def width=(v) Axlsx::validate_unsigned_int(v); @width = v; end
# The index of this anchor in the drawing
# @return [Integer]
def index
@drawing.anchors.index(self)
end
# Serializes the anchor
# @param [Nokogiri::XML::Builder] xml The document builder instance this objects xml will be added to.
# @return [String]
def to_xml(xml)
xml.send('xdr:oneCellAnchor') {
xml.send('xdr:from') {
from.to_xml(xml)
}
xml.send('xdr:ext', ext)
@object.to_xml(xml)
xml.send('xdr:clientData')
}
end
private
# converts the pixel width and height to EMU units and returns a hash of
# !{:cx=>[Integer], :cy=>[Integer]
# @return [Hash]
def ext
cy = @height * 914400 / 96
cx = @width * 914400 / 96
{:cy=>cy, :cx=>cx}
end
end
end
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