1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
require 'action_view/helpers/javascript_helper'
module ActionView
module Helpers
# Provides a set of helpers for calling Scriptaculous JavaScript
# functions, including those which create Ajax controls and visual effects.
#
# To be able to use these helpers, you must include the Prototype
# JavaScript framework and the Scriptaculous JavaScript library in your
# pages. See the documentation for ActionView::Helpers::JavaScriptHelper
# for more information on including the necessary JavaScript.
#
# The Scriptaculous helpers' behavior can be tweaked with various options.
# See the documentation at http://script.aculo.us for more information on
# using these helpers in your application.
module ScriptaculousHelper
unless const_defined? :TOGGLE_EFFECTS
TOGGLE_EFFECTS = [:toggle_appear, :toggle_slide, :toggle_blind]
end
# Returns a JavaScript snippet to be used on the Ajax callbacks for
# starting visual effects.
#
# Example:
# <%= link_to_remote "Reload", :update => "posts",
# :url => { :action => "reload" },
# :complete => visual_effect(:highlight, "posts", :duration => 0.5)
#
# 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:
#
# <%= drop_receiving_element (...), :loading => visual_effect(:fade) %>
#
# 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.
def visual_effect(name, element_id = false, js_options = {})
element = element_id ? element_id.to_json : "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
# Makes the element with the DOM ID specified by +element_id+ sortable
# by drag-and-drop and make an Ajax call whenever the sort order has
# changed. By default, the action called gets the serialized sortable
# element as parameters.
#
# Example:
# <%= sortable_element("my_list", :url => { :action => "order" }) %>
#
# In the example, the action gets a "my_list" array parameter
# containing the values of the ids of elements the sortable consists
# of, in the current order.
#
# Important: For this to work, the sortable elements must have id
# attributes in the form "string_identifier". For example, "item_1". Only
# the identifier part of the id attribute will be serialized.
#
# Additional +options+ are:
#
# <tt>:format</tt>:: A regular expression to determine what to send
# as the serialized id to the server (the default
# is <tt>/^[^_]*_(.*)$/</tt>).
#
# <tt>:constraint</tt>:: Whether to constrain the dragging to either <tt>:horizontal</tt>
# or <tt>:vertical</tt> (or false to make it unconstrained).
#
# <tt>:overlap</tt>:: Calculate the item overlap in the <tt>:horizontal</tt> or
# <tt>:vertical</tt> direction.
#
# <tt>:tag</tt>:: Which children of the container element to treat as
# sortable (default is <tt>li</tt>).
#
# <tt>:containment</tt>:: Takes an element or array of elements to treat as
# potential drop targets (defaults to the original
# target element).
#
# <tt>:only</tt>:: A CSS class name or arry of class names used to filter
# out child elements as candidates.
#
# <tt>:scroll</tt>:: Determines whether to scroll the list during drag
# operations if the list runs past the visual border.
#
# <tt>:tree</tt>:: Determines whether to treat nested lists as part of the
# main sortable list. This means that you can create multi-
# layer lists, and not only sort items at the same level,
# but drag and sort items between levels.
#
# <tt>:hoverclass</tt>:: If set, the Droppable will have this additional CSS class
# when an accepted Draggable is hovered over it.
#
# <tt>:handle</tt>:: Sets whether the element should only be draggable by an
# embedded handle. The value may be a string referencing a
# CSS class value (as of script.aculo.us V1.5). The first
# child/grandchild/etc. element found within the element
# that has this CSS class value will be used as the handle.
#
# <tt>:ghosting</tt>:: Clones the element and drags the clone, leaving the original
# in place until the clone is dropped (default is <tt>false</tt>).
#
# <tt>:dropOnEmpty</tt>:: If set to true, the Sortable container will be made into
# a Droppable, that can receive a Draggable (as according to
# the containment rules) as a child element when there are no
# more elements inside (default is <tt>false</tt>).
#
# <tt>:onChange</tt>:: Called whenever the sort order changes while dragging. When
# dragging from one Sortable to another, the callback is
# called once on each Sortable. Gets the affected element as
# its parameter.
#
# <tt>:onUpdate</tt>:: Called when the drag ends and the Sortable's order is
# changed in any way. When dragging from one Sortable to
# another, the callback is called once on each Sortable. Gets
# the container as its parameter.
#
# See http://script.aculo.us for more documentation.
def sortable_element(element_id, options = {})
javascript_tag(sortable_element_js(element_id, options).chop!)
end
def sortable_element_js(element_id, options = {}) #:nodoc:
options[:with] ||= "Sortable.serialize(#{element_id.to_json})"
options[:onUpdate] ||= "function(){" + remote_function(options) + "}"
options.delete_if { |key, value| PrototypeHelper::AJAX_OPTIONS.include?(key) }
[:tag, :overlap, :constraint, :handle].each do |option|
options[option] = "'#{options[option]}'" if options[option]
end
options[:containment] = array_or_string_for_javascript(options[:containment]) if options[:containment]
options[:only] = array_or_string_for_javascript(options[:only]) if options[:only]
%(Sortable.create(#{element_id.to_json}, #{options_for_javascript(options)});)
end
# Makes the element with the DOM ID specified by +element_id+ draggable.
#
# Example:
# <%= draggable_element("my_image", :revert => true)
#
# You can change the behaviour with various options, see
# http://script.aculo.us for more documentation.
def draggable_element(element_id, options = {})
javascript_tag(draggable_element_js(element_id, options).chop!)
end
def draggable_element_js(element_id, options = {}) #:nodoc:
%(new Draggable(#{element_id.to_json}, #{options_for_javascript(options)});)
end
# Makes the element with the DOM ID specified by +element_id+ receive
# dropped draggable elements (created by draggable_element).
# and make an AJAX call By default, the action called gets the DOM ID
# of the element as parameter.
#
# Example:
# <%= drop_receiving_element("my_cart", :url =>
# { :controller => "cart", :action => "add" }) %>
#
# You can change the behaviour with various options, see
# http://script.aculo.us for more documentation.
#
# Some of these +options+ include:
# <tt>:accept</tt>:: Set this to a string or an array of strings describing the
# allowable CSS classes that the draggable_element must have in order
# to be accepted by this drop_receiving_element.
#
# <tt>:confirm</tt>:: Adds a confirmation dialog.
#
# Example:
# :confirm => "Are you sure you want to do this?"
#
# <tt>:hoverclass</tt>:: If set, the drop_receiving_element will have this additional CSS class
# when an accepted draggable_element is hovered over it.
#
# <tt>:onDrop</tt>:: Called when a draggable_element is dropped onto this element.
# Override this callback with a javascript expression to
# change the default drop behavour.
#
# Example:
# :onDrop => "function(draggable_element, droppable_element, event) { alert('I like bananas') }"
#
# This callback gets three parameters:
# The +Draggable+ element, the +Droppable+ element and the
# +Event+ object. You can extract additional information about the
# drop - like if the Ctrl or Shift keys were pressed - from the +Event+ object.
#
# <tt>:with</tt>:: A JavaScript expression specifying the parameters for the XMLHttpRequest.
# Any expressions should return a valid URL query string.
def drop_receiving_element(element_id, options = {})
javascript_tag(drop_receiving_element_js(element_id, options).chop!)
end
def drop_receiving_element_js(element_id, options = {}) #:nodoc:
options[:with] ||= "'id=' + encodeURIComponent(element.id)"
options[:onDrop] ||= "function(element){" + remote_function(options) + "}"
options.delete_if { |key, value| PrototypeHelper::AJAX_OPTIONS.include?(key) }
options[:accept] = array_or_string_for_javascript(options[:accept]) if options[:accept]
options[:hoverclass] = "'#{options[:hoverclass]}'" if options[:hoverclass]
# Confirmation happens during the onDrop callback, so it can be removed from the options
options.delete(:confirm) if options[:confirm]
%(Droppables.add(#{element_id.to_json}, #{options_for_javascript(options)});)
end
end
end
end
|
