Class: AttributeBinding
Instance Attribute Summary
Attributes inherited from BaseBinding
#binding_name, #context, #target
Instance Method Summary
collapse
Methods inherited from BaseBinding
#queue_update, #remove_anchors, #section, #value_from_getter
Constructor Details
#initialize(page, target, context, binding_name, attribute_name, getter) ⇒ AttributeBinding
Returns a new instance of AttributeBinding.
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# File 'lib/volt/page/bindings/attribute_binding.rb', line 5
def initialize(page, target, context, binding_name, attribute_name, getter)
super(page, target, context, binding_name)
@attribute_name = attribute_name
@getter = getter
setup
end
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Instance Method Details
#changed(event = nil) ⇒ Object
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# File 'lib/volt/page/bindings/attribute_binding.rb', line 34
def changed(event=nil)
case @attribute_name
when 'value'
current_value = element.value
else
current_value = element.is(':checked')
end
@value.cur = current_value
end
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# File 'lib/volt/page/bindings/attribute_binding.rb', line 46
def element
Element.find('#' + binding_name)
end
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# File 'lib/volt/page/bindings/attribute_binding.rb', line 93
def remove
case @attribute_name
when 'value'
element.off('input.attrbind', nil)
when 'checked'
element.off('change.attrbind', nil)
end
if @update_listener
@update_listener.remove
@update_listener = nil
end
@target = nil
@context = nil
@section = nil
end
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# File 'lib/volt/page/bindings/attribute_binding.rb', line 15
def setup
@value = value_from_getter(@getter)
update
@update_listener = @value.on('changed') { update }
case @attribute_name
when 'value'
element.on('input.attrbind') { changed }
when 'checked'
element.on('change.attrbind') {|event| changed(event) }
end
end
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# File 'lib/volt/page/bindings/attribute_binding.rb', line 50
def update
if @attribute_target
value = @attribute_target.to_html
else
value = @value.cur
end
if @attribute_name == 'checked'
update_checked
return
end
if value.is_a?(NilMethodCall) || value.nil?
value = ''
end
self.value = value
end
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#update_checked ⇒ Object
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# File 'lib/volt/page/bindings/attribute_binding.rb', line 82
def update_checked
value = @value.cur
if value.is_a?(NilMethodCall) || value.nil?
value = false
end
element.prop('checked', value)
end
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#value=(val) ⇒ Object
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# File 'lib/volt/page/bindings/attribute_binding.rb', line 69
def value=(val)
case @attribute_name
when 'value'
if val != element.value
element.value = val
end
else
element[@attribute_name] = val
end
end
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