Returns a JavaScript snippet to be used on the Ajax callbacks for starting
visual effects.
If no element_id is given, it assumes “element” which should
be a local variable in the generated JavaScript execution context. This can
be used for example with drop_receiving_element:
This would fade the element that was dropped on the drop receiving element.
For toggling visual effects, you can use :toggle_appear,:toggle_slide, and :toggle_blind which will alternate
between appear/fade, slidedown/slideup, and blinddown/blindup respectively.
You can change the behaviour with various options, see http://script.aculo.us for more
documentation.
# File actionpack/lib/action_view/helpers/scriptaculous_helper.rb, line 41
def visual_effect(name, element_id = false, js_options = {})
element = element_id ? ActiveSupport::JSON.encode(element_id) : "element"
js_options[:queue] = if js_options[:queue].is_a?(Hash)
'{' + js_options[:queue].map {|k, v| k == :limit ? "#{k}:#{v}" : "#{k}:'#{v}'" }.join(',') + '}'
elsif js_options[:queue]
"'#{js_options[:queue]}'"
end if js_options[:queue]
[:endcolor, :direction, :startcolor, :scaleMode, :restorecolor].each do |option|
js_options[option] = "'#{js_options[option]}'" if js_options[option]
end
if TOGGLE_EFFECTS.include? name.to_sym
"Effect.toggle(#{element},'#{name.to_s.gsub(/^toggle_/,'')}',#{options_for_javascript(js_options)});"
else
"new Effect.#{name.to_s.camelize}(#{element},#{options_for_javascript(js_options)});"
end
end
