Class: Ziya::Charts::Support::Draw

Inherits:
Base
  • Object
show all
Includes:
HtmlHelpers::Charts
Defined in:
lib/ziya/charts/support/draw.rb

Overview

Sets up a drawing area on the chart to draw text, rect, circles…

Holds any number of elements to draw. A draw element can be a circle, image (JPEG or SWF), line, rectangle, or text. Use draw “image” to include SWF flash file with animation, roll-over buttons, sounds, scripts, etc.

:

See www.maani.us/xml_charts/index.php?menu=Reference&submenu=draw for additional documentation, examples and futher detail.

Instance Method Summary collapse

Methods included from HtmlHelpers::Charts

#_ziya_chart, #chart_path, #charts_swf, #charts_swf_base, #class_id, #codebase, #composite_base_url, #composite_url, #default_chart_options, #gen_composite_path, #gen_swf_path, #ziya_chart, #ziya_chart_js, #ziya_javascript_include_tag

Methods included from HtmlHelpers::Base

#escape_chars, #escape_once, #escape_url, #mime, #plugin_url, #setup_movie_size, #setup_wmode, #tag, #tag_options

Methods inherited from Base

#==, attributes, #attributes_for, #configured?, has_attribute, #has_sub_components, #initialize, #options, #options_as_string

Constructor Details

This class inherits a constructor from Ziya::Charts::Support::Base

Instance Method Details

#flatten(xml, composite_urls = nil) ⇒ Object

Dump has_attribute into xml element



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# File 'lib/ziya/charts/support/draw.rb', line 35

def flatten( xml, composite_urls=nil )
  if components or composite_urls
    xml.draw do 
      components.each { |comp| comp.flatten( xml ) } if components
      gen_composites( xml, composite_urls ) if composite_urls
    end
  end
end

#gen_composites(xml, composite_urls) ⇒ Object

Generates Draw component for composite charts



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# File 'lib/ziya/charts/support/draw.rb', line 46

def gen_composites( xml, composite_urls ) 
  composite_urls.keys.sort{ |a,b| a.to_s <=> b.to_s }.each do |chart_id|
    # composite descriptor can either be a string for the comp url or a pair for the swf lib_path and url
    raise "You must specify a hash of options" unless composite_urls[chart_id].is_a? Hash
    opts = composite_urls[chart_id].clone
    url  = opts.delete( :url )
    raise "Unable to find composite chart url" unless url
    path = opts.delete(:path ) || chart_path 
    opts[:url] = gen_composite_path( path, url, chart_id )
    
    self.class.module_eval <<-XML
     xml.image( #{opts_as_string( opts )} )
    XML
    
    # xml.image( opts )
  end
end

#merge(parent_attributes, override = false) ⇒ Object

Override merge attributes enhance component definitions vs override



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# File 'lib/ziya/charts/support/draw.rb', line 27

def merge( parent_attributes, override=false )
  comps = send( :components ) || []
  comps = comps + parent_attributes.send( :components ) if parent_attributes.send( :components )
  send( "components=", comps )      
end

#opts_as_string(opts) ⇒ Object

Turns options hash into string representation



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# File 'lib/ziya/charts/support/draw.rb', line 66

def opts_as_string( opts )
  buff = []
  opts.keys.sort{ |a,b| a.to_s <=> b.to_s }.each do |k|
    value = opts[k]
    buff << sprintf( ":%s => '%s'", k, value.to_s ) if value
  end    
  buff.join( "," )
end