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require 'glimmer/data_binding/observable'
require 'glimmer/data_binding/observer'
module Glimmer
module DataBinding
# SWT List widget selection binding
class ListSelectionBinding
include Glimmer
include Observable
include Observer
attr_reader :widget_proxy
PROPERTY_TYPE_UPDATERS = {
:string => lambda { |widget_proxy, value| widget_proxy.swt_widget.select(widget_proxy.swt_widget.index_of(value.to_s)) },
:array => lambda { |widget_proxy, value| widget_proxy.swt_widget.selection=(value || []).to_java(:string) }
}
PROPERTY_EVALUATORS = {
:string => lambda do |selection_array|
return nil if selection_array.empty?
selection_array[0]
end,
:array => lambda do |selection_array|
selection_array
end
}
# Initialize with list widget and property_type
# property_type :string represents default list single selection
# property_type :array represents list multi selection
def initialize(widget_proxy, property_type)
property_type = :string if property_type.nil? or property_type == :undefined
@widget_proxy = widget_proxy
@property_type = property_type
@widget_proxy.on_widget_disposed do |dispose_event|
unregister_all_observables
end
end
def call(value)
PROPERTY_TYPE_UPDATERS[@property_type].call(@widget_proxy, value) unless evaluate_property == value
end
def evaluate_property
selection_array = @widget_proxy.swt_widget.send('selection').to_a #TODO refactor send('selection') into proper method invocation
PROPERTY_EVALUATORS[@property_type].call(selection_array)
end
end
end
end
Version data entries
27 entries across 27 versions & 1 rubygems