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