Class: AasmStatechart::Renderer

Inherits:
Object
  • Object
show all
Defined in:
lib/aasm_statechart.rb

Constant Summary collapse

FORMATS = 
GraphViz::Constants::FORMATS
GRAPH_STYLE = 
{
  rankdir: :TB,
}
NODE_STYLE = 
{
  shape: :Mrecord,
  fontname: 'Arial',
  fontsize: 10,
  penwidth: 0.7,
}
EDGE_STYLE = 
{
  dir: :forward,
  fontname: 'Arial',
  fontsize: 9,
  penwidth: 0.7,
}
START_NODE_STYLE = 
{
  shape: :circle,
  label: '',
  style: :filled,
  color: 'black',
  fillcolor: 'black',
  fixedsize: true,
  width: 0.25,
  height: 0.25,
}
END_NODE_STYLE = 
{
  shape: :doublecircle,
  label: '',
  style: :filled,
  color: 'black',
  fillcolor: 'black',
  fixedsize: true,
  width: 0.20,
  height: 0.20,
}
ENTER_CALLBACKS = 
[:before_enter, :enter, :after_enter, :after_commit]
EXIT_CALLBACKS = 
[:before_exit, :exit, :after_exit]
TRANSITION_CALLBACKS = 
[:before, :on_transition, :after]

Instance Method Summary collapse

Constructor Details

#initialize(klass) ⇒ Renderer

Returns a new instance of Renderer.



56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
 
# File 'lib/aasm_statechart.rb', line 56

def initialize(klass)
  @start_node = nil
  @end_node = nil

  @graph = GraphViz.new(:statechart)
  @graph.type = 'digraph'

  # ruby-graphviz is missing an API to set styles in bulk, so set them here
  GRAPH_STYLE.each { |k, v| @graph.graph[k] = v }
  NODE_STYLE.each { |k, v| @graph.node[k] = v }
  EDGE_STYLE.each { |k, v| @graph.edge[k] = v }

  klass.aasm.states.each { |state| render_state(state) }
  klass.aasm.events.each { |name, event| render_event(name, event) }
end

Instance Method Details

#save(filename, format: 'png') ⇒ Object 



72
73
74
 
# File 'lib/aasm_statechart.rb', line 72

def save(filename, format: 'png')
  @graph.output({format => filename})
end