Class: Rubygame::EventTriggers::AttrTrigger

Inherits:

Object

• Object
• Rubygame::EventTriggers::AttrTrigger

Defined in:

lib/rubygame/event_triggers.rb

Overview

AttrTrigger is an event trigger which fires when an event has the expected value(s) for one or more attributes.

AttrTrigger stores a Hash of :attr => value pairs, and checks each event to see if event.attr returns value. If all attributes have the expected value, the trigger fires.

Instance Method Summary

• #initialize(attributes) ⇒ AttrTrigger constructor

  Initialize a new instance of AttrTrigger with a Hash of one or more :attr => value pairs.

• #match?(event) ⇒ Boolean

  Returns true if, for every :attr => value pair, the event responds to :attr and calling event.attr returns value.

Constructor Details

#initialize(attributes) ⇒ AttrTrigger

Initialize a new instance of AttrTrigger with a Hash of one or more :attr => value pairs.

attributes

The attributes / value pairs to check. (Hash, required)

Example:

# Matches if event.color returns :red and
# event.size returns :big
AttrTrigger.new( :color => :red, :size => :big )

# File 'lib/rubygame/event_triggers.rb', line 193

def initialize( attributes )
	@attributes = attributes
end

Instance Method Details

#match?(event) ⇒ Boolean

Returns true if, for every :attr => value pair, the event responds to :attr and calling event.attr returns value.

Returns false if any of the attributes is not the expected value.

Returns:

• (Boolean)

# File 'lib/rubygame/event_triggers.rb', line 202

def match?( event )
	@attributes.all? { |key, value|
		event.respond_to?(key) and (event.send(key) == value)
	}
end