module RGL::GraphVisitor::ClassMethods

Public Instance Methods

def_event_handler(*events)
Alias for: def_event_handlers
def_event_handlers(*events) click to toggle source

Defines an event handler.

    # File lib/rgl/graph_visitor.rb
101       def def_event_handlers(*events)
102         events.each do |event|
103           params = event.to_s.include?('edge') ? 'u, v' : 'u'
104 
105           handler = "@#{event}_event_handler"
106 
107           class_eval <<-END
108             def handle_#{event}(#{params})
109               #{handler}.call(#{params}) if defined? #{handler}
110             end
111 
112             def set_#{event}_event_handler(&block)
113               #{handler} = block
114             end
115           END
116         end
117       end
Also aliased as: def_event_handler