Class: Wee::Brush::SelectListTag

Inherits:
GenericTagBrush show all
Includes:
CallbackMixin
Defined in:
lib/wee/html_brushes.rb

Overview

Form - Select

Constant Summary collapse

HTML_TAG = 
'select'.freeze

Instance Attribute Summary

Attributes inherited from Wee::Brush

#canvas, #document

Instance Method Summary collapse

Methods included from CallbackMixin

#call, #callback, #callback_method

Methods inherited from GenericTagBrush

#get_oid, html_attr, #oid, #onclick_callback, #onclick_javascript, #onclick_update_callback, #onclick_update_self_callback, #ondblclick_callback

Methods inherited from Wee::Brush

#close, nesting?, #setup

Constructor Details

#initialize(items) ⇒ SelectListTag

Returns a new instance of SelectListTag.



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# File 'lib/wee/html_brushes.rb', line 524

def initialize(items)
  super(HTML_TAG)
  @items = items
end

Instance Method Details

#__callback ⇒ Object 



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# File 'lib/wee/html_brushes.rb', line 552

def __callback
  #
  # A callback was specified. We have to wrap it inside another
  # callback, as we want to perform some additional actions.
  #
  name(@canvas.register_callback(:input, proc {|input|
    input = [input] unless input.kind_of?(Array)
    choosen = input.map {|idx| get_item(idx) }

    if @attributes.has_key?(:multiple)
      @callback.call(choosen)
    elsif choosen.size > 1
      raise "more than one element was choosen from a not-multiple SelectListTag" 
    else
      @callback.call(choosen.first)
    end
  }))
end

#items(items) ⇒ Object 



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# File 'lib/wee/html_brushes.rb', line 529

def items(items)
  @items = items
  self
end

#labels(arg = nil, &block) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/wee/html_brushes.rb', line 540

def labels(arg=nil, &block)
  raise ArgumentError if arg and block
  if block
    @labels = proc {|i| block.call(@items[i])}
  else
    @labels = arg
  end
  self
end

#selected(arg = nil, &block) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/wee/html_brushes.rb', line 534

def selected(arg=nil, &block)
  raise ArgumentError if arg and block
  @selected = block || arg
  self
end

#with ⇒ Object 



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# File 'lib/wee/html_brushes.rb', line 579

def with
  @labels ||= @items.collect {|i| i.to_s}

  if @attributes.has_key?(:multiple)
    @selected ||= Array.new
    meth = @selected.kind_of?(Proc) ? (:call) : (:include?)
  else
    meth = @selected.kind_of?(Proc) ? (:call) : (:==)
  end

  super {
    @items.each_index do |i|
      @canvas.option.value(i).selected(@selected.send(meth, @items[i])).with(@labels[i])
    end 
  }
end