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$LOAD_PATH << File.dirname(__FILE__) + File::SEPARATOR + "../"
require "rghost/ps_object"
require "rghost/ruby_to_ps"
require "rghost/variable"
require "rghost/units"
require "rghost/function"
require "rghost/callback"
# Grid's Header.
# You can get a header instance using:
# grid=Grid::Rails.new
# grid.header
#
# You can also define callbacks:
#
# grid.header.before_column :only => [1,2] do
# use_tag :span
# end
#
class RGhost::Grid::Header < RGhost::PsObject
include RGhost::RubyToPs
DEFAULT_OPTIONS = {width: 4, align: :center, title_align: nil, header_width: nil, format: :string}
attr_reader :data_types, :titles, :size
def initialize(headings = true, options = {}, &block) # :nodoc:
@header = RGhost::PsObject.new
@data_types = []
@options = []
@titles = []
@header.set RGhost::Variable.new(:new_page?, true)
@default_options = DEFAULT_OPTIONS.merge(options)
@header.set RGhost::Variable.new(:headings?, headings)
@size = 0
instance_eval(&block) if block
end
def ps
p, h = format_header
@header.set RGhost::Variable.new(:header_titles, to_array(@titles))
@header.set RGhost::Variable.new(:table_params, " [\n #{p}] \n")
@header.set RGhost::Variable.new(:table_header, " [\n #{h}] \n")
@header
end
def col(name = "", options = {}) # :nodoc:
opts = @default_options.merge(options)
@size += opts[:width]
@data_types << opts[:format]
@options << opts
@titles << ps_escape(name.to_s)
end
def default_options(opts) # :nodoc:
@default_options.merge!(opts)
end
def column(name, options = {}) # :nodoc:
col(name, options)
end
def next_column(name, options = {}) # :nodoc:
col(name, options)
end
def before_create(&)
# @header.set RGhost::Function.new(:before_header_create, &block )
new_static_callback(:before_header_create, &)
end
def after_create(&)
# @header.set RGhost::Function.new(:after_header_create, &block )
new_static_callback(:after_header_create, &)
end
def before_column(options = {}, &)
@header.set RGhost::Callback.new(:before_column_header, options, &)
end
def after_column(options = {}, &)
@header.set RGhost::Callback.new(:after_column_header, options, &)
end
private
def new_static_callback(name, &)
callback_body = RGhost::PsFacade.new(&)
@header.set RGhost::Function.new(name, callback_body)
end
def format_header
p = "" # params
h = "" # params_head
o = @options.dup
o.each do |v|
v[:title_align] ||= v[:align]
v[:header_width] ||= v[:width]
p << "[ #{RGhost::Units.parse(v[:width])} /st_#{v[:align]}]\n "
h << "[ #{RGhost::Units.parse(v[:header_width])} /st_#{v[:title_align]}]\n "
end
[p, h]
end
end
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