Class: DrawCycle

Inherits:
Object show all
Defined in:
lib/volt/page/draw_cycle.rb

Overview

The draw cycle is responsible for queueing redraws until all of the events have fired. Once that is done, everything will be redrawn. This prevents bindings from being drawn multiple times before all events have propigated.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ DrawCycle

Returns a new instance of DrawCycle.



5
6
7
8
 
# File 'lib/volt/page/draw_cycle.rb', line 5

def initialize
  @queue = {}
  @timer = nil
end

Instance Method Details

#flush ⇒ Object 



19
20
21
22
23
24
25
26
27
28
29
30
 
# File 'lib/volt/page/draw_cycle.rb', line 19

def flush
  @timer = nil

  work_queue = @queue
  @queue = {}

  work_queue.each_pair do |binding,_|
    # Call the update if queued
    binding.update
  end

end

#queue(binding) ⇒ Object 



10
11
12
13
14
15
16
17
 
# File 'lib/volt/page/draw_cycle.rb', line 10

def queue(binding)
  @queue[binding] = true

  unless @timer
    # Flush once everything else has finished running
    @timer = `setTimeout(function() { self.$flush(); }, 0);`
  end
end