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Versions: 27
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Contents
module SugarCube
class AnimationChain
class << self
def chains
@chains ||= []
end
def start_chain(chain)
chains << chain unless chains.include?(chain)
end
def stop_chain(chain)
chains.delete(chain)
end
end
def initialize
raise "animation chains cannot be nested" if Thread.current[:sugarcube_chaining]
@blocks = []
end
def wait(duration)
and_then(duration: duration) {}
end
def and_then(options=nil, &block)
if options
options = options.dup
else
options = {}
end
@blocks << [options, block]
self
end
def << block
and_then(&block)
end
def do_next
return nil if @block_index >= @blocks.length
options, block = @blocks[@block_index]
@after_block = ->(completed) do
if @abort || ! self.do_next
@running = false
if @loop
start
else
AnimationChain.stop_chain(self)
end
end
end.weak!
options[:after] = @after_block
UIView.animate(options) do
Thread.current[:sugarcube_chaining] = true
block.call if block
Thread.current[:sugarcube_chaining] = nil
@block_index += 1
end
true
end
def start
return if @running
AnimationChain.start_chain(self)
@running = true
@abort = nil
@block_index = 0
if Fixnum === @loop
@loop -= 1
@loop = nil if @loop == 0
end
do_next
return self
end
# @param times [Fixnum,nil] number of times to loop, or any other truthy value to loop forever
def loop(times=true)
@loop = times
start
end
# Cancels a loop, but lets the chain finish
def stop
@loop = nil
end
# stops the animation immediately
def abort
return unless @running
@loop = nil
@abort = true
@running = false
end
end
end
Version data entries
27 entries across 27 versions & 1 rubygems