136 lines
6 KiB
Ruby
136 lines
6 KiB
Ruby
require File.dirname(__FILE__) + '/javascript_helper'
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module ActionView
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module Helpers
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# Provides a set of helpers for calling Scriptaculous JavaScript
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# functions, including those which create Ajax controls and visual effects.
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#
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# To be able to use these helpers, you must include the Prototype
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# JavaScript framework and the Scriptaculous JavaScript library in your
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# pages. See the documentation for ActionView::Helpers::JavaScriptHelper
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# for more information on including the necessary JavaScript.
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#
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# The Scriptaculous helpers' behavior can be tweaked with various options.
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# See the documentation at http://script.aculo.us for more information on
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# using these helpers in your application.
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module ScriptaculousHelper
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unless const_defined? :TOGGLE_EFFECTS
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TOGGLE_EFFECTS = [:toggle_appear, :toggle_slide, :toggle_blind]
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end
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# Returns a JavaScript snippet to be used on the Ajax callbacks for
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# starting visual effects.
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#
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# Example:
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# <%= link_to_remote "Reload", :update => "posts",
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# :url => { :action => "reload" },
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# :complete => visual_effect(:highlight, "posts", :duration => 0.5)
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#
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# If no element_id is given, it assumes "element" which should be a local
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# variable in the generated JavaScript execution context. This can be
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# used for example with drop_receiving_element:
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#
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# <%= drop_receving_element (...), :loading => visual_effect(:fade) %>
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#
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# This would fade the element that was dropped on the drop receiving
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# element.
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#
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# For toggling visual effects, you can use :toggle_appear, :toggle_slide, and
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# :toggle_blind which will alternate between appear/fade, slidedown/slideup, and
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# blinddown/blindup respectively.
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#
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# You can change the behaviour with various options, see
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# http://script.aculo.us for more documentation.
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def visual_effect(name, element_id = false, js_options = {})
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element = element_id ? element_id.to_json : "element"
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js_options[:queue] = if js_options[:queue].is_a?(Hash)
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'{' + js_options[:queue].map {|k, v| k == :limit ? "#{k}:#{v}" : "#{k}:'#{v}'" }.join(',') + '}'
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elsif js_options[:queue]
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"'#{js_options[:queue]}'"
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end if js_options[:queue]
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if TOGGLE_EFFECTS.include? name.to_sym
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"Effect.toggle(#{element},'#{name.to_s.gsub(/^toggle_/,'')}',#{options_for_javascript(js_options)});"
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else
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"new Effect.#{name.to_s.camelize}(#{element},#{options_for_javascript(js_options)});"
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end
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end
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# Makes the element with the DOM ID specified by +element_id+ sortable
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# by drag-and-drop and make an Ajax call whenever the sort order has
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# changed. By default, the action called gets the serialized sortable
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# element as parameters.
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#
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# Example:
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# <%= sortable_element("my_list", :url => { :action => "order" }) %>
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#
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# In the example, the action gets a "my_list" array parameter
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# containing the values of the ids of elements the sortable consists
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# of, in the current order.
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#
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# You can change the behaviour with various options, see
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# http://script.aculo.us for more documentation.
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def sortable_element(element_id, options = {})
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javascript_tag(sortable_element_js(element_id, options).chop!)
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end
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def sortable_element_js(element_id, options = {}) #:nodoc:
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options[:with] ||= "Sortable.serialize(#{element_id.to_json})"
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options[:onUpdate] ||= "function(){" + remote_function(options) + "}"
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options.delete_if { |key, value| PrototypeHelper::AJAX_OPTIONS.include?(key) }
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[:tag, :overlap, :constraint, :handle].each do |option|
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options[option] = "'#{options[option]}'" if options[option]
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end
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options[:containment] = array_or_string_for_javascript(options[:containment]) if options[:containment]
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options[:only] = array_or_string_for_javascript(options[:only]) if options[:only]
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%(Sortable.create(#{element_id.to_json}, #{options_for_javascript(options)});)
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end
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# Makes the element with the DOM ID specified by +element_id+ draggable.
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#
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# Example:
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# <%= draggable_element("my_image", :revert => true)
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#
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# You can change the behaviour with various options, see
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# http://script.aculo.us for more documentation.
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def draggable_element(element_id, options = {})
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javascript_tag(draggable_element_js(element_id, options).chop!)
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end
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def draggable_element_js(element_id, options = {}) #:nodoc:
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%(new Draggable(#{element_id.to_json}, #{options_for_javascript(options)});)
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end
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# Makes the element with the DOM ID specified by +element_id+ receive
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# dropped draggable elements (created by draggable_element).
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# and make an AJAX call By default, the action called gets the DOM ID
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# of the element as parameter.
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#
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# Example:
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# <%= drop_receiving_element("my_cart", :url =>
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# { :controller => "cart", :action => "add" }) %>
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#
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# You can change the behaviour with various options, see
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# http://script.aculo.us for more documentation.
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def drop_receiving_element(element_id, options = {})
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javascript_tag(drop_receiving_element_js(element_id, options).chop!)
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end
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def drop_receiving_element_js(element_id, options = {}) #:nodoc:
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options[:with] ||= "'id=' + encodeURIComponent(element.id)"
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options[:onDrop] ||= "function(element){" + remote_function(options) + "}"
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options.delete_if { |key, value| PrototypeHelper::AJAX_OPTIONS.include?(key) }
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options[:accept] = array_or_string_for_javascript(options[:accept]) if options[:accept]
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options[:hoverclass] = "'#{options[:hoverclass]}'" if options[:hoverclass]
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%(Droppables.add(#{element_id.to_json}, #{options_for_javascript(options)});)
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end
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end
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end
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end
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