Class: GraphCanvas

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ GraphCanvas

Returns a new instance of GraphCanvas.



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# File 'lib/graph_canvas.rb', line 26

def initialize
  super
  @iterative = true

  @frame = 0
  @queue = ConcurrentLinkedQueue.new

  @d = 25
  @poly = Polygon.new
  @poly.addPoint(0, 0)
  @poly.addPoint(6, 14)
  @poly.addPoint(0, 11)
  @poly.addPoint(-6, 14)
  @poly.addPoint(0, 0)
  setBackground(Color::black)
end

Instance Attribute Details

#graph ⇒ Object

Returns the value of attribute graph.



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# File 'lib/graph_canvas.rb', line 23

def graph
  @graph
end

#iterative ⇒ Object

Returns the value of attribute iterative.



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# File 'lib/graph_canvas.rb', line 24

def iterative
  @iterative
end

#layout ⇒ Object

Returns the value of attribute layout.



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# File 'lib/graph_canvas.rb', line 23

def layout
  @layout
end

Instance Method Details

#height ⇒ Object 



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# File 'lib/graph_canvas.rb', line 183

def height
  return self.getHeight
end

#paint(g) ⇒ Object 



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# File 'lib/graph_canvas.rb', line 54

def paint(g)
  if @queue.size > 0
    @painting = true
    @queued_layout = @queue.poll
    paint_graph(g)
    java.lang.Thread.sleep(20)
    repaint
  elsif @layout
    @queued_layout = @layout
    paint_graph(g)
    @painting = false
  end
end

#paint_arrowhead(g, edge) ⇒ Object 



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# File 'lib/graph_canvas.rb', line 129

def paint_arrowhead(g, edge)
  a = @queued_layout[edge.source]
  b = @queued_layout[edge.target]
  g.setStroke(BasicStroke.new(2))
  line = Line2D::Double.new(a.x, a.y, b.x, b.y)
  g.draw(line)
  teta = Math::atan2((a.x - b.x), a.y - b.y)
  dist = Math.sqrt((a.x - b.x)**2 + (a.y - b.y)**2)
  frac = @d/2.0 / dist
  px = b.x - frac * (b.x - a.x)
  py = b.y - frac * (b.y - a.y)

  at = g.getTransform
  g.translate(px, py)
  g.rotate(-teta)

  if (@queued_layout.graph.has_edge_data_key?(:path) and @queued_layout.graph.edge_data(:path)[edge])
    color = g.getColor
    stroke = g.getStroke
    g.setColor(Color::ORANGE)
    g.setStroke(BasicStroke.new(6))
    g.draw(@poly)
    g.setStroke(stroke)
    g.setColor(color)
  end
  g.draw(@poly)
  g.fill(@poly)


  g.setTransform(at)
end

#paint_edge(g, edge) ⇒ Object 



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# File 'lib/graph_canvas.rb', line 108

def paint_edge(g, edge)
  s = @queued_layout[edge.source]
  t = @queued_layout[edge.target]
  line = Line2D::Double.new(s.x, s.y, t.x, t.y)
  if (@queued_layout.graph.has_edge_data_key?(:path) and @queued_layout.graph.edge_data(:path)[edge])
    g.setColor(Color::ORANGE)
    g.setStroke(BasicStroke.new(6))
    g.draw(line)
  end
  if (@queued_layout.graph.edge_data(:is_clicked?) and @queued_layout.graph.edge_data(:is_clicked?)[edge])
    g.setColor(Color::blue)
  else
    g.setColor(Color::white)
  end
  if (edge.directed?)
    paint_arrowhead(g, edge)
  end
  g.setStroke(BasicStroke.new(2))
  g.draw(line)
end

#paint_edges(g) ⇒ Object 



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# File 'lib/graph_canvas.rb', line 161

def paint_edges(g)
  g.setColor(Color::white)
  @queued_layout.graph.each_edge do |edge|
    if edge.source == edge.target
      paint_ref_edge(g, edge)
    else
      paint_edge(g, edge)
    end
  end
end

#paint_graph(g) ⇒ Object 



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# File 'lib/graph_canvas.rb', line 68

def paint_graph(g)
  if (@queued_layout.graph)
    paint_info(g)
    paint_edges(g)
    paint_nodes(g)
  end
end

#paint_info(g) ⇒ Object 



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# File 'lib/graph_canvas.rb', line 76

def paint_info(g)
  rh =  RenderingHints.new(RenderingHints.new(RenderingHints::KEY_ANTIALIASING, RenderingHints::VALUE_ANTIALIAS_ON))
  g.setRenderingHints(rh);
  g.setStroke(BasicStroke.new(2))

  finished = ""
  finished = "finished" if @queued_layout.finished?
  g.setColor(Color::white)
  g.drawString("Iteration: #{@queued_layout.iterations}", 10, 20)
  g.drawString("Layout: #{@queued_layout.class.name} #{finished}", 10, self.height - 20)
end

#paint_node(g, node, location) ⇒ Object 



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# File 'lib/graph_canvas.rb', line 88

def paint_node(g, node, location)
  shape = Ellipse2D::Double.new(location.x-@d/2.0, location.y-@d/2.0, @d, @d)
  g.setColor(Color::black)
  g.fill(shape)
  if @queued_layout.graph.node_data(:is_clicked?) and @queued_layout.graph.node_data(:is_clicked?)[node]
    g.setColor(Color::blue)
  elsif @queued_layout.graph.node_data(:path) and @queued_layout.graph.node_data(:path)[node]
    g.setColor(Color::red)
  else
    g.setColor(Color::white)
  end
  g.draw(shape)
end

#paint_nodes(g) ⇒ Object 



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# File 'lib/graph_canvas.rb', line 102

def paint_nodes(g)
  @queued_layout.each_node_location do |node, location|
    paint_node(g, node, location)
  end
end

#paint_ref_edges(g, node) ⇒ Object 



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# File 'lib/graph_canvas.rb', line 172

def paint_ref_edges(g, node)
  loc = @layout[node]
  shape = Ellipse2D::Double.new(loc.x, loc.y, 40, 40)
  g.setColor(Color::white)
  g.draw(shape)
end

#update_layout(layout) ⇒ Object 



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# File 'lib/graph_canvas.rb', line 43

def update_layout(layout)
  if @iterative
    if @layout != layout
      @layout = layout
      @queue.clear
    end
    @queue.add(layout.deep_copy)
    repaint unless @painting
  end
end

#width ⇒ Object 



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# File 'lib/graph_canvas.rb', line 179

def width
  return self.getWidth
end