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require 'clevic/qt/combo_delegate.rb'
module Clevic
# Edit a relation from an id and display a list of relevant entries.
#
# attribute is the method to call on the row entity to retrieve the related object.
#
# The ids of the model objects are stored in the item data
# and the item text is fetched from them using attribute_path.
class RelationalDelegate < ComboDelegate
def item_to_editor( item )
[ field.transform_attribute( item ), item.pk.to_variant ]
end
def editor_to_item( data )
entity.related_class[ data ]
end
# called by Qt when it wants to give the delegate an index to edit
def setEditorData( editor_widget, model_index )
if is_combo?( editor_widget )
unless model_index.attribute_value.nil?
editor_widget.selected_item = model_index.attribute_value
end
editor_widget.line_edit.andand.select_all
end
end
# return an entity object, given a text selection
def translate_from_editor_text( editor_widget, text )
item_index = editor_widget.find_text( text )
# fetch record id from editor_widget item_data
item_data = editor_widget.item_data( item_index )
if item_data.valid?
# get the entity it refers to, if there is one
# return nil if nil was passed or the entity wasn't found
field.related_class[ item_data.to_int ]
end
end
end
end
require 'clevic/delegates/relational_delegate.rb'
Version data entries
8 entries across 8 versions & 1 rubygems