Module: Shoes::Basic

Defined in:

lib/shoes.rb

Instance Method Summary

• #tween(opts, &blk) ⇒ Object

Instance Method Details

#tween(opts, &blk) ⇒ Object

# File 'lib/shoes.rb', line 451

def tween opts, &blk
  opts = opts.dup

  if opts[:upward]
    opts[:top] = self.top - opts.delete(:upward)
  elsif opts[:downward]
    opts[:top] = self.top + opts.delete(:downward)
  end
  
  if opts[:sideways]
    opts[:left] = self.left + opts.delete(:sideways)
  end
  
  @TWEEN.remove if @TWEEN
  @TWEEN = parent.animate(opts[:speed] || 20) do

    # figure out a coordinate halfway between here and there
    cont = opts.select do |k, v|
      if self.respond_to? k
        n, o = v, self.send(k)
        if n != o
          n = o + ((n - o) / 2)
          n = v if o == n
          self.send("#{k}=", n)
        end
        self.style[k] != v
      end
    end

    # if we're there, get rid of the animation
    if cont.empty?
      @TWEEN.remove
      @TWEEN = nil
      blk.call if blk
    end
  end
end