Module: ActionView::Helpers::SliderHelper

Defined in:
lib/helpers/slider_helper.rb

Instance Method Summary collapse

Instance Method Details

#slider_element(element_id, options = {}) ⇒ Object

Creates a slider control out of an element.



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# File 'lib/helpers/slider_helper.rb', line 30

def slider_element(element_id, options={})
  prepare = "Element.cleanWhitespace('#{element_id}');"
  
  [:change, :slide].each do |k|
    if options.include?(k)
      name = 'on' + k.to_s.capitalize
      options[name] = "function(value){#{options[k]}}"
      options.delete k
     end
  end
  
  [:spans, :axis].each do |k|
    options[k] = array_or_string_for_javascript(options[k]) if options[k]
  end
  
  options[:sliderValue] = array_or_numeric_for_javascript(options[:sliderValue]) if options[:sliderValue]
  
  options[:range] = "$R(#{options[:range].min},#{options[:range].max})" if options[:range]
  options[:values] = "$R(#{options[:values].min},#{options[:values].max})" if options[:values]
  
  slider = ''
  
  if options[:hidden_fields] == true
    slider = if options[:handles].kind_of?(Array)
      hidden_fields = options[:handles].collect { |h| hidden_field_tag(h.to_s + "_value") }
      hidden_fields.join("\n")
    elsif !options[:handles].nil?
      hidden_field_tag(options[:handles].to_s + "_value")
    end
    
    options.delete(:hidden_fields)
  end
  
  handle = array_or_string_for_javascript(options[:handles]) || "$('#{element_id}').firstChild"
  options.delete :handles
          
  slider += javascript_tag("#{prepare} #{element_id} = new Control.Slider(#{handle},'#{element_id}', #{options_for_javascript(options)})")
end

#slider_field(object, method, options = {}) ⇒ Object

Creates a simple slider control and associates it with a hidden text field



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# File 'lib/helpers/slider_helper.rb', line 70

def slider_field(object, method, options={})
  options.merge!({ 
    :change => "$('#{object}_#{method}').value = value",
    :hidden_fields => false
  })
  if slider_value = instance_variable_get("@#{object}").send(method)
    options.merge!({ :sliderValue  => slider_value })
  end
  hidden_field(object, method) <<        
  content_tag('div',content_tag('div', ''), 
    :class => 'slider', :id => "#{object}_#{method}_slider") << 
  slider_element("#{object}_#{method}_slider", options).html_safe
end

#slider_stylesheet ⇒ Object 



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# File 'lib/helpers/slider_helper.rb', line 84

def slider_stylesheet
  content_tag("style", <<-EOT
    div.slider {
      width: 150px;
      height: 5px;
      margin-top:5px;
      margin-bottom:5px;
      background: #ddd;
      position: relative;
    }
    div.slider div {
      position:absolute;
      width:8px;
      height:15px;
      margin-top:-5px;
      background: #999;
      border:1px outset white;
    }
  EOT
  )
end