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igraphSen.py~
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from igraph import *
class GraphSen(Graph):
def __init__(self, *args, **kwds):
Graph.__init__(self, *args, **kwds)
def __plot__(self, context, bbox, palette, *args, **kwds):
import igraph.colors
import cairo
directed = self.is_directed()
margin = kwds.get("margin", [0., 0., 0., 0.])
try:
margin = list(margin)
except TypeError:
margin = [margin]
while len(margin)<4: margin.extend(margin)
margin = tuple(map(float, margin[:4]))
vertex_colors = drawing.collect_attributes(self.vcount(), "vertex_color", \
"color", kwds, self.vs, config, "blue", palette.get)
vertex_stroke_colors = drawing.collect_attributes(self.vcount(), "vertex_stroke_color", \
"stroke_color", kwds, self.vs, config, "black", palette.get)
vertex_sizes = drawing.collect_attributes(self.vcount(), "vertex_size", \
"size", kwds, self.vs, config, 10, float)
vertex_shapes = [drawing.known_shapes.get(x, drawing.NullDrawer) \
for x in drawing.collect_attributes(self.vcount(), "vertex_shape", \
"shape", kwds, self.vs, config, "circle")]
#layer is a variable which is basically -- do we want to have a layer?
# True allows us to layer
# Define colors2 and sizes2
vertex_layer = drawing.collect_attributes(self.vcount(), "vertex_layer", \
"layer", kwds, self.vs, config, False, bool)
vertex_colors2 = drawing.collect_attributes(self.vcount(), "vertex_color2", \
"color2", kwds, self.vs, config, "pink", palette.get)
vertex_sizes2 = drawing.collect_attributes(self.vcount(), "vertex_size2", \
"size2", kwds, self.vs, config, 10, float)
max_vertex_size = max(vertex_sizes)
layout = kwds.get("layout", None)
if isinstance(layout, Layout):
layout = Layout(layout.coords)
elif isinstance(layout, str) or layout is None:
layout = self.layout(layout)
else:
layout = Layout(layout)
sl, st, sr, sb = layout.bounding_box()
sw, sh = sr-sl, sb-st
if sw == 0 and sh == 0: sw, sh = 1, 1
if sw == 0: sw = sh
if sh == 0: sh = sw
rx, ry = float(bbox.width-max_vertex_size-margin[1]-margin[3])/sw, \
float(bbox.height-max_vertex_size-margin[0]-margin[2])/sh
layout.scale(rx, ry)
layout.translate(-sl*rx+max_vertex_size/2.+margin[1]+bbox.coords[0], \
-st*ry+max_vertex_size/2.+margin[0]+bbox.coords[1])
context.set_line_width(1)
edge_colors = drawing.collect_attributes(self.ecount(), "edge_color", \
"color", kwds, self.es, config, "gray", palette.get)
edge_widths = drawing.collect_attributes(self.ecount(), "edge_width", \
"width", kwds, self.es, config, 1, float)
edge_arrow_sizes = drawing.collect_attributes(self.ecount(), \
"edge_arrow_size", "arrow_size", kwds, self.es, config, 1, float)
edge_arrow_widths = drawing.collect_attributes(self.ecount(), \
"edge_arrow_width", "arrow_width", kwds, self.es, config, 1, float)
# Draw the edges
for idx, e in enumerate(self.es):
context.set_source_rgb(*edge_colors[idx])
context.set_line_width(edge_widths[idx])
src, tgt = e.tuple
if src == tgt:
# Loop edge
r = vertex_sizes[src]*2
cx, cy = layout[src][0]+math.cos(math.pi/4)*r/2, \
layout[src][1]-math.sin(math.pi/4)*r/2
context.arc(cx, cy, r/2., 0, math.pi*2)
else:
# Determine where the edge intersects the circumference of the
# vertex shape. TODO: theoretically this need not to be done
# if there are no arrowheads on the edge, but maybe it's not worth
# testing for
p1 = vertex_shapes[src].intersection_point( \
layout[src][0], layout[src][1], layout[tgt][0], layout[tgt][1],
vertex_sizes[src])
p2 = vertex_shapes[tgt].intersection_point( \
layout[tgt][0], layout[tgt][1], layout[src][0], layout[src][1],
vertex_sizes[tgt])
context.move_to(*p1)
context.line_to(*p2)
context.stroke()
if directed and src != tgt:
# Draw an arrowhead
angle = math.atan2(p2[1]-p1[1], p2[0]-p1[0])
arrow_size = 15.*edge_arrow_sizes[idx]
arrow_width = 10./edge_arrow_widths[idx]
a1 = (p2[0]-arrow_size*math.cos(angle-math.pi/arrow_width),
p2[1]-arrow_size*math.sin(angle-math.pi/arrow_width))
a2 = (p2[0]-arrow_size*math.cos(angle+math.pi/arrow_width),
p2[1]-arrow_size*math.sin(angle+math.pi/arrow_width))
context.move_to(*p2)
context.line_to(*a1)
context.line_to(*a2)
context.line_to(*p2)
context.fill()
del edge_colors
del edge_widths
## vertex_layer = drawing.collect_attributes(self.vcount(), "vertex_layer", \
## "layer", kwds, self.vs, config, False, bool)
## vertex_colors2 = drawing.collect_attributes(self.vcount(), "vertex_color2", \
## "color2", kwds, self.vs, config, "black", palette.get)
## vertex_sizes2 = drawing.collect_attributes(self.vcount(), "vertex_size2", \
## "size2", kwds, self.vs, config, 15, float)
# Draw the vertices
context.set_line_width(1)
for idx, v in enumerate(self.vs):
if (vertex_layer[idx]):
if (vertex_sizes2[idx] >= vertex_sizes[idx]):
vertex_shapes[idx].draw_path(context, layout[idx][0], layout[idx][1], vertex_sizes2[idx])
context.set_source_rgb(*vertex_colors2[idx])
context.fill_preserve()
context.set_source_rgb(*vertex_stroke_colors[idx])
context.stroke()
vertex_shapes[idx].draw_path(context, layout[idx][0], layout[idx][1], vertex_sizes[idx])
context.set_source_rgb(*vertex_colors[idx])
context.fill_preserve()
context.stroke()
else:
vertex_shapes[idx].draw_path(context, layout[idx][0], layout[idx][1], vertex_sizes[idx])
context.set_source_rgb(*vertex_colors[idx])
context.fill_preserve()
context.set_source_rgb(*vertex_stroke_colors[idx])
context.stroke()
vertex_shapes[idx].draw_path(context, layout[idx][0], layout[idx][1], vertex_sizes2[idx])
context.set_source_rgb(*vertex_colors2[idx])
context.fill_preserve()
context.stroke()
else:
vertex_shapes[idx].draw_path(context, layout[idx][0], layout[idx][1], vertex_sizes[idx])
context.set_source_rgb(*vertex_colors[idx])
context.fill_preserve()
context.set_source_rgb(*vertex_stroke_colors[idx])
context.stroke()
#RL ADD
del vertex_stroke_colors
del vertex_colors
del vertex_shapes
del vertex_layer
del vertex_colors2
del vertex_sizes2
# Draw the vertex labels
if not kwds.has_key("vertex_label") and "label" not in self.vs.attribute_names():
vertex_labels = map(str, xrange(self.vcount()))
elif kwds.has_key("vertex_label") and kwds["vertex_label"] is None:
vertex_labels = [""] * self.vcount()
else:
vertex_labels = drawing.collect_attributes(self.vcount(), "vertex_label", \
"label", kwds, self.vs, config, None)
vertex_dists = drawing.collect_attributes(self.vcount(), "vertex_label_dist", \
"label_dist", kwds, self.vs, config, 1, float)
vertex_degrees = drawing.collect_attributes(self.vcount(), \
"vertex_label_angle", "label_angle", kwds, self.vs, config, \
-math.pi/4, float)
vertex_label_colors = drawing.collect_attributes(self.vcount(), \
"vertex_label_color", "label_color", kwds, self.vs, config, \
"black", palette.get)
vertex_label_sizes = drawing.collect_attributes(self.vcount(), \
"vertex_label_size", "label_size", kwds, self.vs, \
config, 14, float)
context.select_font_face("sans-serif", cairo.FONT_SLANT_NORMAL, \
cairo.FONT_WEIGHT_BOLD)
for idx, v in enumerate(self.vs):
xb, yb, w, h = context.text_extents(vertex_labels[idx])[:4]
cx, cy = layout[idx]
cx += math.cos(vertex_degrees[idx]) * vertex_dists[idx] * vertex_sizes[idx]
cy += math.sin(vertex_degrees[idx]) * vertex_dists[idx] * vertex_sizes[idx]
cx -= w/2. + xb
cy -= h/2. + yb
context.move_to(cx, cy)
#RL ADD
context.select_font_face("Arial", cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_BOLD)
context.set_font_size(vertex_label_sizes[idx])
context.set_source_rgb(*vertex_label_colors[idx])
context.text_path(vertex_labels[idx])
context.fill()