cairo_draw.py 66.1 KB
Newer Older
Tiago Peixoto's avatar
Tiago Peixoto committed
1
2
3
4
5
#! /usr/bin/env python
# -*- coding: utf-8 -*-
#
# graph_tool -- a general graph manipulation python module
#
Tiago Peixoto's avatar
Tiago Peixoto committed
6
# Copyright (C) 2006-2015 Tiago de Paula Peixoto <tiago@skewed.de>
Tiago Peixoto's avatar
Tiago Peixoto committed
7
8
9
10
11
12
13
14
15
16
17
18
19
20
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

21
from __future__ import division, absolute_import, print_function
22
23
24
import sys
if sys.version_info < (3,):
    range = xrange
25

Tiago Peixoto's avatar
Tiago Peixoto committed
26
27
import os
import warnings
28
import numpy
Tiago Peixoto's avatar
Tiago Peixoto committed
29
30
31
32

try:
    import cairo
except ImportError:
33
34
35
    msg = "Error importing cairo. Graph drawing will not work."
    warnings.filterwarnings("always", msg, ImportWarning)
    warnings.warn(msg, ImportWarning)
36
    raise
Tiago Peixoto's avatar
Tiago Peixoto committed
37

Tiago Peixoto's avatar
Tiago Peixoto committed
38
default_cm = None
Tiago Peixoto's avatar
Tiago Peixoto committed
39
try:
40
41
    import matplotlib.artist
    import matplotlib.backends.backend_cairo
42
43
    import matplotlib.cm
    import matplotlib.colors
44
    from matplotlib.cbook import flatten
45
46
47
48
49
50
51
52
53
54
55
56
57
58
    default_clrs = [(0.5529411764705883, 0.8274509803921568, 0.7803921568627451, 1.0),
                    #(1.0, 1.0, 0.7019607843137254, 1.0),
                    (0.7450980392156863, 0.7294117647058823, 0.8549019607843137, 1.0),
                    (0.984313725490196, 0.5019607843137255, 0.4470588235294118, 1.0),
                    (0.5019607843137255, 0.6941176470588235, 0.8274509803921568, 1.0),
                    (0.9921568627450981, 0.7058823529411765, 0.3843137254901961, 1.0),
                    (0.7019607843137254, 0.8705882352941177, 0.4117647058823529, 1.0),
                    (0.9882352941176471, 0.803921568627451, 0.8980392156862745, 1.0),
                    (0.8509803921568627, 0.8509803921568627, 0.8509803921568627, 1.0),
                    (0.7372549019607844, 0.5019607843137255, 0.7411764705882353, 1.0),
                    (0.8, 0.9215686274509803, 0.7725490196078432, 1.0),
                    (1.0, 0.9294117647058824, 0.43529411764705883, 1.0)]
    default_cm = matplotlib.colors.LinearSegmentedColormap.from_list("Set3",
                                                                     default_clrs)
59
    is_draw_inline = 'inline' in matplotlib.get_backend()
Tiago Peixoto's avatar
Tiago Peixoto committed
60
except ImportError:
61
62
63
    msg = "Error importing matplotlib module. Graph drawing will not work."
    warnings.filterwarnings("always", msg, ImportWarning)
    warnings.warn(msg, ImportWarning)
64
    raise
Tiago Peixoto's avatar
Tiago Peixoto committed
65

66
67
try:
    import IPython.display
Tiago Peixoto's avatar
Tiago Peixoto committed
68
except ImportError:
69
70
    pass

Tiago Peixoto's avatar
Tiago Peixoto committed
71
72
73
74
import numpy as np
import gzip
import bz2
import zipfile
75
import copy
76
import io
Tiago Peixoto's avatar
Tiago Peixoto committed
77
78
79
from collections import defaultdict

from .. import GraphView, PropertyMap, ungroup_vector_property,\
80
81
     group_vector_property, _prop, _check_prop_vector

Tiago Peixoto's avatar
Tiago Peixoto committed
82
83
84
from .. stats import label_parallel_edges, label_self_loops

from .. dl_import import dl_import
85
dl_import("from . import libgraph_tool_draw")
Tiago Peixoto's avatar
Tiago Peixoto committed
86
try:
87
    from .libgraph_tool_draw import vertex_attrs, edge_attrs, vertex_shape,\
Tiago Peixoto's avatar
Tiago Peixoto committed
88
89
        edge_marker
except ImportError:
90
91
92
93
    msg = "Error importing cairo-based drawing library. " + \
        "Was graph-tool compiled with cairomm support?"
    warnings.filterwarnings("always", msg, ImportWarning)
    warnings.warn(msg, ImportWarning)
Tiago Peixoto's avatar
Tiago Peixoto committed
94
95
96
97
98
99

from .. draw import sfdp_layout, random_layout, _avg_edge_distance, \
    coarse_graphs

_vdefaults = {
    "shape": "circle",
100
101
    "color": (0.6, 0.6, 0.6, 0.8),
    "fill_color": (0.6470588235294118, 0.058823529411764705, 0.08235294117647059, 0.8),
Tiago Peixoto's avatar
Tiago Peixoto committed
102
    "size": 5,
103
    "aspect": 1.,
104
    "anchor": 1,
Tiago Peixoto's avatar
Tiago Peixoto committed
105
106
107
    "pen_width": 0.8,
    "halo": 0,
    "halo_color": [0., 0., 1., 0.5],
108
    "halo_size": 1.5,
Tiago Peixoto's avatar
Tiago Peixoto committed
109
110
111
    "text": "",
    "text_color": [0., 0., 0., 1.],
    "text_position": -1.,
112
113
    "text_rotation": 0.,
    "text_offset": [0., 0.],
Tiago Peixoto's avatar
Tiago Peixoto committed
114
115
116
    "font_family": "serif",
    "font_slant": cairo.FONT_SLANT_NORMAL,
    "font_weight": cairo.FONT_WEIGHT_NORMAL,
117
    "font_size": 12.,
118
119
    "surface": None,
    "pie_fractions": [0.75, 0.25],
120
    "pie_colors": default_clrs # ('b', 'g', 'r', 'c', 'm', 'y', 'k')
Tiago Peixoto's avatar
Tiago Peixoto committed
121
122
123
    }

_edefaults = {
124
    "color": (0.1796875, 0.203125, 0.2109375, 0.8),
Tiago Peixoto's avatar
Tiago Peixoto committed
125
126
127
128
129
    "pen_width": 1,
    "start_marker": "none",
    "mid_marker": "none",
    "end_marker": "none",
    "marker_size": 4.,
130
    "mid_marker_pos": .5,
Tiago Peixoto's avatar
Tiago Peixoto committed
131
    "control_points": [],
Tiago Peixoto's avatar
Tiago Peixoto committed
132
    "gradient": [],
133
    "dash_style": [],
134
    "text": "",
135
    "text_color": (0., 0., 0., 1.),
136
137
138
139
140
141
    "text_distance": 5,
    "text_parallel": True,
    "font_family": "serif",
    "font_slant": cairo.FONT_SLANT_NORMAL,
    "font_weight": cairo.FONT_WEIGHT_NORMAL,
    "font_size": 12.,
142
    "sloppy": False
Tiago Peixoto's avatar
Tiago Peixoto committed
143
144
145
146
147
148
149
150
151
152
153
154
    }


def shape_from_prop(shape, enum):
    if isinstance(shape, PropertyMap):
        if shape.key_type() == "v":
            prop = shape.get_graph().new_vertex_property("int")
            descs = shape.get_graph().vertices()
        else:
            descs = shape.get_graph().edges()
            prop = shape.get_graph().new_edge_property("int")
        offset = min(enum.values.keys())
155
        vals = dict([(int(k - offset), v) for k, v in enum.values.items()])
Tiago Peixoto's avatar
Tiago Peixoto committed
156
157
158
        for v in descs:
            if shape.value_type() == "string":
                prop[v] = int(enum.__dict__[shape[v]])
159
160
161
162
            elif int(shape[v]) in vals:
                prop[v] = int(vals[int(shape[v])])
            elif int(shape[v]) - offset in vals:
                prop[v] = int(vals[int(shape[v]) - offset])
Tiago Peixoto's avatar
Tiago Peixoto committed
163
            else:
164
165
                raise ValueError("Invalid value for attribute %s: %s" %
                                 (repr(enum), repr(shape[v])))
Tiago Peixoto's avatar
Tiago Peixoto committed
166
167
168
169
170
171
172
173
174
175
        return prop

    if isinstance(shape, str):
        return int(enum.__dict__[shape])
    else:
        return shape

    raise ValueError("Invalid value for attribute %s: %s" %
                     (repr(enum), repr(shape)))

176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
def open_file(name, mode="r"):
    name = os.path.expanduser(name)
    base, ext = os.path.splitext(name)
    if ext == ".gz":
        out = gzip.GzipFile(name, mode)
        name = base
    elif ext == ".bz2":
        out = bz2.BZ2File(name, mode)
        name = base
    elif ext == ".zip":
        out = zipfile.ZipFile(name, mode)
        name = base
    else:
        out = open(name, mode)
    fmt = os.path.splitext(name)[1].replace(".", "")
191
    return out, fmt
192

193
194
195
196
197
198
199
200
201
202
203
204
def get_file_fmt(name):
    name = os.path.expanduser(name)
    base, ext = os.path.splitext(name)
    if ext == ".gz":
        name = base
    elif ext == ".bz2":
        name = base
    elif ext == ".zip":
        name = base
    fmt = os.path.splitext(name)[1].replace(".", "")
    return fmt

205
206
207
208
209
210
211
212
213
214
215
216
217
218
219

def surface_from_prop(surface):
    if isinstance(surface, PropertyMap):
        if surface.key_type() == "v":
            prop = surface.get_graph().new_vertex_property("object")
            descs = surface.get_graph().vertices()
        else:
            descs = surface.get_graph().edges()
            prop = surface.get_graph().new_edge_property("object")
        surface_map = {}
        for v in descs:
            if surface.value_type() == "string":
                if surface[v] not in surface_map:
                    sfc = gen_surface(surface[v])
                    surface_map[surface[v]] = sfc
220
                prop[v] = surface_map[surface[v]]
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
            elif surface.value_type() == "python::object":
                if isinstance(surface[v], cairo.Surface):
                    prop[v] = surface[v]
                else:
                    raise ValueError("Invalid value type for surface property: " +
                                     str(type(surface[v])))
            else:
                raise ValueError("Invalid value type for surface property: " +
                                 surface.value_type())
        return prop

    if isinstance(surface, str):
        return gen_surface(surface)
    elif isinstance(surface, cairo.Surface) or surface is None:
        return surface

    raise ValueError("Invalid value for attribute surface: " + repr(surface))

239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
def centered_rotation(g, pos, text_pos=True):
    x, y = ungroup_vector_property(pos, [0, 1])
    cm = (x.fa.mean(), y.fa.mean())
    dx = x.fa - cm[0]
    dy = y.fa - cm[0]
    angle = g.new_vertex_property("double")
    angle.fa = numpy.arctan2(dy, dx)
    pi = numpy.pi
    angle.fa += 2 * pi
    angle.fa %= 2 * pi
    if text_pos:
        idx = (angle.a > pi / 2 ) * (angle.a < 3 * pi / 2)
        tpos = g.new_vertex_property("double")
        angle.a[idx] += pi
        tpos.a[idx] = pi
        return angle, tpos
    return angle
Tiago Peixoto's avatar
Tiago Peixoto committed
256
257
258
259

def _convert(attr, val, cmap):
    if attr == vertex_attrs.shape:
        return shape_from_prop(val, vertex_shape)
260
261
    if attr == vertex_attrs.surface:
        return surface_from_prop(val)
Tiago Peixoto's avatar
Tiago Peixoto committed
262
263
264
265
    if attr in [edge_attrs.start_marker, edge_attrs.mid_marker,
                edge_attrs.end_marker]:
        return shape_from_prop(val, edge_marker)

266
267
268
269
    if attr in [vertex_attrs.pie_colors]:
        if isinstance(val, PropertyMap):
            if val.value_type() in ["vector<double>", "vector<long double>"]:
                return val
270
            if val.value_type() in ["vector<int32_t>", "vector<int64_t>", "vector<bool>"]:
271
272
273
274
275
                g = val.get_graph()
                new_val = g.new_vertex_property("vector<double>")
                rg = [float("inf"), -float("inf")]
                for v in g.vertices():
                    for x in val[v]:
276
277
                        rg[0] = min(x, rg[0])
                        rg[1] = max(x, rg[1])
278
279
280
                if rg[0] == rg[1]:
                    rg[1] = 1
                for v in g.vertices():
281
                    new_val[v] = flatten([cmap((x - rg[0]) / (rg[1] - rg[0])) for x in val[v]])
282
                return new_val
283
284
285
286
            if val.value_type() == "vector<string>":
                g = val.get_graph()
                new_val = g.new_vertex_property("vector<double>")
                for v in g.vertices():
287
                    new_val[v] = flatten([matplotlib.colors.ColorConverter().to_rgba(x) for x in val[v]])
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
                return new_val
            if val.value_type() == "python::object":
                try:
                    g = val.get_graph()
                    new_val = g.new_vertex_property("vector<double>")
                    for v in g.vertices():
                        try:
                            new_val[v] = [float(x) for x in flatten(val[v])]
                        except ValueError:
                            new_val[v] = flatten([matplotlib.colors.ColorConverter().to_rgba(x) for x in val[v]])
                    return new_val
                except ValueError:
                    pass
        else:
            try:
                return [float(x) for x in flatten(val)]
            except ValueError:
                try:
                    new_val = flatten(matplotlib.colors.ColorConverter().to_rgba(x) for x in val)
                    return list(new_val)
                except ValueError:
                    pass
Tiago Peixoto's avatar
Tiago Peixoto committed
310
    if attr in [vertex_attrs.color, vertex_attrs.fill_color,
311
                vertex_attrs.text_color, vertex_attrs.halo_color,
312
                edge_attrs.color, edge_attrs.text_color]:
Tiago Peixoto's avatar
Tiago Peixoto committed
313
314
315
316
317
318
319
320
321
322
323
        if isinstance(val, list):
            return val
        if isinstance(val, (tuple, np.ndarray)):
            return list(val)
        if isinstance(val, str):
            return list(matplotlib.colors.ColorConverter().to_rgba(val))
        if isinstance(val, PropertyMap):
            if val.value_type() in ["vector<double>", "vector<long double>"]:
                return val
            if val.value_type() in ["int32_t", "int64_t", "double",
                                    "long double", "unsigned long", "bool"]:
Tiago Peixoto's avatar
Tiago Peixoto committed
324
325
326
                try:
                    vrange = [val.fa.min(), val.fa.max()]
                except ValueError:
Tiago Peixoto's avatar
Tiago Peixoto committed
327
328
329
330
331
                    vrange = val[val.get_graph().vertex(0)]
                    vrange = [vrange, vrange]
                    for v in val.get_graph().vertices():
                        vrange[0] = min(vrange[0], val[v])
                        vrange[1] = max(vrange[1], val[v])
332
                cnorm = matplotlib.colors.Normalize(vmin=vrange[0],
Tiago Peixoto's avatar
Tiago Peixoto committed
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
                                                    vmax=vrange[1])
                if val.key_type() == "v":
                    prop = val.get_graph().new_vertex_property("vector<double>")
                    descs = val.get_graph().vertices()
                else:
                    prop = val.get_graph().new_edge_property("vector<double>")
                    descs = val.get_graph().edges()
                for v in descs:
                    prop[v] = cmap(cnorm(val[v]))
                return prop
            if val.value_type() == "string":
                if val.key_type() == "v":
                    prop = val.get_graph().new_vertex_property("vector<double>")
                    for v in val.get_graph().vertices():
                        prop[v] = matplotlib.colors.ColorConverter().to_rgba(val[v])
                elif val.key_type() == "e":
                    prop = val.get_graph().new_edge_property("vector<double>")
                    for e in val.get_graph().edges():
                        prop[e] = matplotlib.colors.ColorConverter().to_rgba(val[e])
                return prop
        raise ValueError("Invalid value for attribute %s: %s" %
                         (repr(attr), repr(val)))
    return val


def _attrs(attrs, d, g, cmap):
    nattrs = {}
    defaults = {}
361
    for k, v in list(attrs.items()):
Tiago Peixoto's avatar
Tiago Peixoto committed
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
        try:
            if d == "v":
                attr = vertex_attrs.__dict__[k]
            else:
                attr = edge_attrs.__dict__[k]
        except KeyError:
            warnings.warn("Unknown attribute: " + k, UserWarning)
            continue
        if isinstance(v, PropertyMap):
            nattrs[int(attr)] = _prop(d, g, _convert(attr, v, cmap))
        else:
            defaults[int(attr)] = _convert(attr, v, cmap)
    return nattrs, defaults


def get_attr(attr, d, attrs, defaults):
    if attr in attrs:
        p = attrs[attr]
    else:
        p = defaults[attr]
    if isinstance(p, PropertyMap):
        return p[d]
    else:
        return p


388
389
def position_parallel_edges(g, pos, loop_angle=float("nan"),
                            parallel_distance=1):
Tiago Peixoto's avatar
Tiago Peixoto committed
390
391
    lp = label_parallel_edges(GraphView(g, directed=False))
    ll = label_self_loops(g)
392
393
394
395
396
397
    if isinstance(loop_angle, PropertyMap):
        angle = loop_angle
    else:
        angle = g.new_vertex_property("double")
        angle.a = float(loop_angle)

Tiago Peixoto's avatar
Tiago Peixoto committed
398
    g = GraphView(g, directed=True)
399
400
    if ((len(lp.fa) == 0 or lp.fa.max() == 0) and
        (len(ll.fa) == 0 or ll.fa.max() == 0)):
Tiago Peixoto's avatar
Tiago Peixoto committed
401
402
403
404
        return []
    else:
        spline = g.new_edge_property("vector<double>")
        libgraph_tool_draw.put_parallel_splines(g._Graph__graph,
405
                                                _prop("v", g, pos),
Tiago Peixoto's avatar
Tiago Peixoto committed
406
                                                _prop("e", g, lp),
407
                                                _prop("e", g, spline),
408
                                                _prop("v", g, angle),
409
                                                parallel_distance)
Tiago Peixoto's avatar
Tiago Peixoto committed
410
411
412
413
414
415
        return spline


def parse_props(prefix, args):
    props = {}
    others = {}
416
    for k, v in list(args.items()):
Tiago Peixoto's avatar
Tiago Peixoto committed
417
418
419
420
421
422
423
424
        if k.startswith(prefix + "_"):
            props[k.replace(prefix + "_", "")] = v
        else:
            others[k] = v
    return props, others


def cairo_draw(g, pos, cr, vprops=None, eprops=None, vorder=None, eorder=None,
425
426
               nodesfirst=False, vcmap=default_cm,
               ecmap=default_cm, loop_angle=float("nan"),
427
               parallel_distance=None, fit_view=False, **kwargs):
Tiago Peixoto's avatar
Tiago Peixoto committed
428
    r"""
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
    Draw a graph to a :mod:`cairo` context.

    Parameters
    ----------
    g : :class:`~graph_tool.Graph`
        Graph to be drawn.
    pos : :class:`~graph_tool.PropertyMap`
        Vector-valued vertex property map containing the x and y coordinates of
        the vertices.
    cr : :class:`~cairo.Context`
        A :class:`~cairo.Context` instance.
    vprops : dict (optional, default: ``None``)
        Dictionary with the vertex properties. Individual properties may also be
        given via the ``vertex_<prop-name>`` parameters, where ``<prop-name>`` is
        the name of the property.
    eprops : dict (optional, default: ``None``)
        Dictionary with the vertex properties. Individual properties may also be
        given via the ``edge_<prop-name>`` parameters, where ``<prop-name>`` is
        the name of the property.
    vorder : :class:`~graph_tool.PropertyMap` (optional, default: ``None``)
        If provided, defines the relative order in which the vertices are drawn.
    eorder : :class:`~graph_tool.PropertyMap` (optional, default: ``None``)
        If provided, defines the relative order in which the edges are drawn.
    nodesfirst : bool (optional, default: ``False``)
        If ``True``, the vertices are drawn first, otherwise the edges are.
454
    vcmap : :class:`matplotlib.colors.Colormap` (optional, default: :class:`default_cm`)
455
        Vertex color map.
456
    ecmap : :class:`matplotlib.colors.Colormap` (optional, default: :class:`default_cm`)
457
        Edge color map.
458
    loop_angle : float or :class:`~graph_tool.PropertyMap` (optional, default: ``nan``)
459
460
461
462
463
        Angle used to draw self-loops. If ``nan`` is given, they will be placed
        radially from the center of the layout.
    parallel_distance : float (optional, default: ``None``)
        Distance used between parallel edges. If not provided, it will be
        determined automatically.
464
    fit_view : bool or float or tuple (optional, default: ``True``)
465
        If ``True``, the layout will be scaled to fit the entire clip region.
466
        If a float value is given, it will be interpreted as ``True``, and in
467
468
469
        addition the viewport will be scaled out by that factor. If a tuple
        value is given, it should have four values ``(x, y, w, h)`` that
        specify the view in user coordinates.
470
471
    bg_color : str or sequence (optional, default: ``None``)
        Background color. The default is transparent.
472
473
474
475
476
477
478
479
    vertex_* : :class:`~graph_tool.PropertyMap` or arbitrary types (optional, default: ``None``)
        Parameters following the pattern ``vertex_<prop-name>`` specify the
        vertex property with name ``<prop-name>``, as an alternative to the
        ``vprops`` parameter.
    edge_* : :class:`~graph_tool.PropertyMap` or arbitrary types (optional, default: ``None``)
        Parameters following the pattern ``edge_<prop-name>`` specify the edge
        property with name ``<prop-name>``, as an alternative to the ``eprops``
        parameter.
Tiago Peixoto's avatar
Tiago Peixoto committed
480
481
482

    """

483
484
    vprops = {} if vprops is None else copy.copy(vprops)
    eprops = {} if eprops is None else copy.copy(eprops)
Tiago Peixoto's avatar
Tiago Peixoto committed
485
486
487
488
489
490
491
492

    props, kwargs = parse_props("vertex", kwargs)
    vprops.update(props)
    props, kwargs = parse_props("edge", kwargs)
    eprops.update(props)
    for k in kwargs:
        warnings.warn("Unknown parameter: " + k, UserWarning)

493
    cr.save()
494
    if fit_view != False:
495
496
        extents = cr.clip_extents()
        output_size = (extents[2] - extents[0], extents[3] - extents[1])
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
        try:
            x, y, w, h = fit_view
            cr.scale(output_size[0] / w, output_size[1] / h)
            cr.translate(-x, -y)
        except TypeError:
            offset, zoom = fit_to_view(g, pos, output_size,
                                       vprops.get("size", _vdefaults["size"]),
                                       vprops.get("pen_width", _vdefaults["pen_width"]),
                                       None, vprops.get("text", None),
                                       vprops.get("font_family",
                                                  _vdefaults["font_family"]),
                                       vprops.get("font_size",
                                                  _vdefaults["font_size"]),
                                       cr)
            cr.translate(offset[0], offset[1])
            if not isinstance(fit_view, bool):
                zoom /= fit_view
            cr.scale(zoom, zoom)
515

Tiago Peixoto's avatar
Tiago Peixoto committed
516
    if "control_points" not in eprops:
517
518
519
520
521
522
523
524
525
526
        if parallel_distance is None:
            parallel_distance = vprops.get("size", _vdefaults["size"])
            if isinstance(parallel_distance, PropertyMap):
                parallel_distance = parallel_distance.fa.mean()
            parallel_distance /= 1.5
            M = cr.get_matrix()
            scale = transform_scale(M, 1,)
            parallel_distance /= scale
        eprops["control_points"] = position_parallel_edges(g, pos, loop_angle,
                                                           parallel_distance)
Tiago Peixoto's avatar
Tiago Peixoto committed
527
528
    if g.is_directed() and "end_marker" not in eprops:
        eprops["end_marker"] = "arrow"
529

530
531
532
533
534
    if vprops.get("text_position", None) == "centered":
        angle, tpos = centered_rotation(g, pos, text_pos=True)
        vprops["text_position"] = tpos
        vprops["text_rotation"] = angle

Tiago Peixoto's avatar
Tiago Peixoto committed
535
536
537
538
539
540
    vattrs, vdefaults = _attrs(vprops, "v", g, vcmap)
    eattrs, edefaults = _attrs(eprops, "e", g, ecmap)
    vdefs = _attrs(_vdefaults, "v", g, vcmap)[1]
    vdefs.update(vdefaults)
    edefs = _attrs(_edefaults, "e", g, ecmap)[1]
    edefs.update(edefaults)
541
542
543
544
545
546

    if "control_points" not in eprops:
        if parallel_distance is None:
            parallel_distance = _defaults
        eprops["control_points"] = position_parallel_edges(g, pos, loop_angle,
                                                           parallel_distance)
Tiago Peixoto's avatar
Tiago Peixoto committed
547
548
549
550
    g = GraphView(g, directed=True)
    libgraph_tool_draw.cairo_draw(g._Graph__graph, _prop("v", g, pos),
                                  _prop("v", g, vorder), _prop("e", g, eorder),
                                  nodesfirst, vattrs, eattrs, vdefs, edefs, cr)
551
    cr.restore()
Tiago Peixoto's avatar
Tiago Peixoto committed
552
553


554
555
def color_contrast(color):
    c = np.asarray(color)
556
557
    y = c[0] * .299 + c[1] * .587 + c[2] * .114
    if y < .5:
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
        c[:3] = 1
    else:
        c[:3] = 0
    return c


def auto_colors(g, bg, pos, back):
    c = g.new_vertex_property("vector<double>")
    for v in g.vertices():
        if isinstance(bg, PropertyMap):
            bgc = bg[v]
        elif isinstance(bg, str):
            bgc = matplotlib.colors.ColorConverter().to_rgba(bg)
        else:
            bgc = bg
        if isinstance(pos, PropertyMap):
            p = pos[v]
        else:
576
577
578
579
            if pos == "centered":
                p = 0
            else:
                p = pos
580
581
582
583
584
585
        if p < 0:
            c[v] = color_contrast(bgc)
        else:
            c[v] = color_contrast(back)
    return c

Tiago Peixoto's avatar
Tiago Peixoto committed
586
587
def graph_draw(g, pos=None, vprops=None, eprops=None, vorder=None, eorder=None,
               nodesfirst=False, output_size=(600, 600), fit_view=True,
588
               inline=is_draw_inline, mplfig=None, output=None, fmt="auto", **kwargs):
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
    r"""Draw a graph to screen or to a file using :mod:`cairo`.

    Parameters
    ----------
    g : :class:`~graph_tool.Graph`
        Graph to be drawn.
    pos : :class:`~graph_tool.PropertyMap` (optional, default: ``None``)
        Vector-valued vertex property map containing the x and y coordinates of
        the vertices. If not given, it will be computed using :func:`sfdp_layout`.
    vprops : dict (optional, default: ``None``)
        Dictionary with the vertex properties. Individual properties may also be
        given via the ``vertex_<prop-name>`` parameters, where ``<prop-name>`` is
        the name of the property.
    eprops : dict (optional, default: ``None``)
        Dictionary with the vertex properties. Individual properties may also be
        given via the ``edge_<prop-name>`` parameters, where ``<prop-name>`` is
        the name of the property.
    vorder : :class:`~graph_tool.PropertyMap` (optional, default: ``None``)
        If provided, defines the relative order in which the vertices are drawn.
    eorder : :class:`~graph_tool.PropertyMap` (optional, default: ``None``)
        If provided, defines the relative order in which the edges are drawn.
    nodesfirst : bool (optional, default: ``False``)
        If ``True``, the vertices are drawn first, otherwise the edges are.
    output_size : tuple of scalars (optional, default: ``(600,600)``)
        Size of the drawing canvas. The units will depend on the output format
        (pixels for the screen, points for PDF, etc).
615
616
617
618
619
620
    fit_view : bool, float or tuple (optional, default: ``True``)
        If ``True``, the layout will be scaled to fit the entire clip region.
        If a float value is given, it will be interpreted as ``True``, and in
        addition the viewport will be scaled out by that factor. If a tuple
        value is given, it should have four values ``(x, y, w, h)`` that
        specify the view in user coordinates.
621
622
623
    inline : bool (optional, default: ``False``)
        If ``True`` and an `IPython notebook <http://ipython.org/notebook>`_  is
        being used, an inline version of the drawing will be returned.
624
625
626
627
628
    mplfig : :mod:`matplotlib` container object (optional, default: ``None``)
        The ``mplfig`` object needs to have an ``artists`` attribute. This can
        for example be a :class:`matplotlib.figure.Figure` or
        :class:`matplotlib.axes.Axes`. Only the cairo backend is supported; use
        ``switch_backend('cairo')``.
629
630
    output : string or file object (optional, default: ``None``)
        Output file name (or object). If not given, the graph will be displayed via
631
632
633
634
635
        :func:`interactive_window`.
    fmt : string (default: ``"auto"``)
        Output file format. Possible values are ``"auto"``, ``"ps"``, ``"pdf"``,
        ``"svg"``, and ``"png"``. If the value is ``"auto"``, the format is
        guessed from the ``output`` parameter.
636
637
    bg_color : str or sequence (optional, default: ``None``)
        Background color. The default is transparent.
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
    vertex_* : :class:`~graph_tool.PropertyMap` or arbitrary types (optional, default: ``None``)
        Parameters following the pattern ``vertex_<prop-name>`` specify the
        vertex property with name ``<prop-name>``, as an alternative to the
        ``vprops`` parameter.
    edge_* : :class:`~graph_tool.PropertyMap` or arbitrary types (optional, default: ``None``)
        Parameters following the pattern ``edge_<prop-name>`` specify the edge
        property with name ``<prop-name>``, as an alternative to the ``eprops``
        parameter.
    **kwargs
        Any extra parameters are passed to :func:`~graph_tool.draw.interactive_window`,
        :class:`~graph_tool.draw.GraphWindow`, :class:`~graph_tool.draw.GraphWidget`
        and :func:`~graph_tool.draw.cairo_draw`.

    Returns
    -------
    pos : :class:`~graph_tool.PropertyMap`
        Vector vertex property map with the x and y coordinates of the vertices.
    selected : :class:`~graph_tool.PropertyMap` (optional, only if ``output is None``)
        Boolean-valued vertex property map marking the vertices which were
        selected interactively.

    Notes
    -----


    .. table:: **List of vertex properties**

        +---------------+---------------------------------------------------+------------------------+----------------------------------+
        | Name          | Description                                       | Accepted types         | Default Value                    |
        +===============+===================================================+========================+==================================+
        | shape         | The vertex shape. Can be one of the following     | ``str`` or ``int``     | ``"circle"``                     |
        |               | strings: "circle", "triangle", "square",          |                        |                                  |
        |               | "pentagon", "hexagon", "heptagon", "octagon"      |                        |                                  |
        |               | "double_circle", "double_triangle",               |                        |                                  |
        |               | "double_square", "double_pentagon",               |                        |                                  |
        |               | "double_hexagon", "double_heptagon",              |                        |                                  |
674
        |               | "double_octagon", "pie".                          |                        |                                  |
675
676
677
678
679
680
681
682
683
684
685
686
687
        |               | Optionally, this might take a numeric value       |                        |                                  |
        |               | corresponding to position in the list above.      |                        |                                  |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
        | color         | Color used to stroke the lines of the vertex.     | ``str`` or list of     | ``[0., 0., 0., 1]``              |
        |               |                                                   | ``floats``             |                                  |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
        | fill_color    | Color used to fill the interior of the vertex.    | ``str`` or list of     | ``[0.640625, 0, 0, 0.9]``        |
        |               |                                                   | ``floats``             |                                  |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
        | size          | The size of the vertex, in the default units of   | ``float`` or ``int``   | ``5``                            |
        |               | the output format (normally either pixels or      |                        |                                  |
        |               | points).                                          |                        |                                  |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
688
689
        | aspect        | The aspect ratio of the vertex.                   | ``float`` or ``int``   | ``1.0``                          |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
690
691
692
693
        | anchor        | Specifies how the edges anchor to the vertices.   |  ``int``               | ``1``                            |
        |               | If `0`, the anchor is at the center of the vertex,|                        |                                  |
        |               | otherwise it is at the border.                    |                        |                                  |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
694
695
696
697
698
699
700
701
702
703
        | pen_width     | Width of the lines used to draw the vertex, in    | ``float`` or ``int``   | ``0.8``                          |
        |               | the default units of the output format (normally  |                        |                                  |
        |               | either pixels or points).                         |                        |                                  |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
        | halo          | Whether to draw a circular halo around the        | ``bool``               | ``False``                        |
        |               | vertex.                                           |                        |                                  |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
        | halo_color    | Color used to draw the halo.                      | ``str`` or list of     | ``[0., 0., 1., 0.5]``            |
        |               |                                                   | ``floats``             |                                  |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
704
705
706
        | halo_size     | Relative size of the halo.                        | ``float``              | ``1.5``                          |
        |               |                                                   |                        |                                  |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
707
708
        | text          | Text to draw together with the vertex.            | ``str``                | ``""``                           |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
709
710
711
        | text_color    | Color used to draw the text. If the value is      | ``str`` or list of     | ``"auto"``                       |
        |               | ``"auto"``, it will be computed based on          | ``floats``             |                                  |
        |               | fill_color to maximize contrast.                  |                        |                                  |
712
713
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
        | text_position | Position of the text relative to the vertex.      | ``float`` or ``int``   | ``-1``                           |
714
        |               | If the passed value is positive, it will          |  or ``"centered"``     |                                  |
715
716
717
        |               | correspond to an angle in radians, which will     |                        |                                  |
        |               | determine where the text will be placed outside   |                        |                                  |
        |               | the vertex. If the value is negative, the text    |                        |                                  |
718
719
        |               | will be placed inside the vertex. If the value is |                        |                                  |
        |               | ``-1``, the vertex size will be automatically     |                        |                                  |
720
721
722
        |               | increased to accommodate the text. The special    |                        |                                  |
        |               | value ``"centered"`` positions the texts rotated  |                        |                                  |
        |               | radially around the center of mass.               |                        |                                  |
723
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
724
725
726
727
728
729
        | text_offset   | Text position offset.                             | list of ``float``      | ``[0.0, 0.0]``                   |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
        | text_rotation | Angle of rotation (in radians) for the text.      | ``float``              | ``0.0``                          |
        |               | The center of rotation is the position of the     |                        |                                  |
        |               | vertex.                                           |                        |                                  |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
730
731
732
733
734
735
736
737
        | font_family   | Font family used to draw the text.                | ``str``                | ``"serif"``                      |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
        | font_slant    | Font slant used to draw the text.                 | ``cairo.FONT_SLANT_*`` | :data:`cairo.FONT_SLANT_NORMAL`  |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
        | font_weight   | Font weight used to draw the text.                | ``cairo.FONT_WEIGHT_*``| :data:`cairo.FONT_WEIGHT_NORMAL` |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
        | font_size     | Font size used to draw the text.                  | ``float`` or ``int``   | ``12``                           |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
738
739
        | surface       | The cairo surface used to draw the vertex. If     | :class:`cairo.Surface` | ``None``                         |
        |               | the value passed is a string, it is interpreted   | or ``str``             |                                  |
Tiago Peixoto's avatar
Tiago Peixoto committed
740
        |               | as an image file name to be loaded.               |                        |                                  |
741
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
742
743
744
745
746
747
        | pie_fractions | Fractions of the pie sections for the vertices if | list of ``int`` or     | ``[0.75, 0.25]``                 |
        |               | ``shape=="pie"``.                                 | ``float``              |                                  |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
        | pie_colors    | Colors used in the pie sections if                | list of strings or     | ``('b','g','r','c','m','y','k')``|
        |               | ``shape=="pie"``.                                 | ``float``.             |                                  |
        +---------------+---------------------------------------------------+------------------------+----------------------------------+
748
749
750
751
752
753
754
755
756
757
758
759
760
761


    .. table:: **List of edge properties**

        +----------------+---------------------------------------------------+------------------------+----------------------------------+
        | Name           | Description                                       | Accepted types         | Default Value                    |
        +================+===================================================+========================+==================================+
        | color          | Color used to stroke the edge lines.              | ``str`` or list of     | ``[0.179, 0.203,0.210, 0.8]``    |
        |                |                                                   | floats                 |                                  |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
        | pen_width      | Width of the line used to draw the edge, in       | ``float`` or ``int``   | ``1.0``                          |
        |                | the default units of the output format (normally  |                        |                                  |
        |                | either pixels or points).                         |                        |                                  |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
762
        | start_marker,  | Edge markers. Can be one of "none", "arrow",      | ``str`` or ``int``     | ``none``                         |
763
764
765
766
        | mid_marker,    | "circle", "square", "diamond", or "bar".          |                        |                                  |
        | end_marker     | Optionally, this might take a numeric value       |                        |                                  |
        |                | corresponding to position in the list above.      |                        |                                  |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
767
768
        | mid_marker_pos | Relative position of the middle marker.           | ``float``              | ``0.5``                          |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
769
770
771
772
        | marker_size    | Size of edge markers, in units appropriate to the | ``float`` or ``int``   | ``4``                            |
        |                | output format (normally either pixels or points). |                        |                                  |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
        | control_points | Control points of a Bézier spline used to draw    | sequence of ``floats`` | ``[]``                           |
Tiago Peixoto's avatar
Tiago Peixoto committed
773
774
775
776
777
778
779
780
781
        |                | the edge. Each spline segment requires 6 values   |                        |                                  |
        |                | corresponding to the (x,y) coordinates of the two |                        |                                  |
        |                | intermediary control points and the final point.  |                        |                                  |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
        | gradient       | Stop points of a linear gradient used to stroke   | sequence of ``floats`` | ``[]``                           |
        |                | the edge. Each group of 5 elements is interpreted |                        |                                  |
        |                | as ``[o, r, g, b, a]`` where ``o`` is the offset  |                        |                                  |
        |                | in the range [0, 1] and the remaining values      |                        |                                  |
        |                | specify the colors.                               |                        |                                  |
782
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
783
784
785
786
787
788
        | dash_style     | Dash pattern is specified by an array of positive | sequence of ``floats`` | ``[]``                           |
        |                | values. Each value provides the length of         |                        |                                  |
        |                | alternate "on" and "off" portions of the stroke.  |                        |                                  |
        |                | The last value specifies an offset into the       |                        |                                  |
        |                | pattern at which the stroke begins.               |                        |                                  |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
        | text           | Text to draw next to the edges.                   | ``str``                | ``""``                           |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
        | text_color     | Color used to draw the text.                      | ``str`` or list of     | ``[0., 0., 0., 1.]``             |
        |                |                                                   | ``floats``             |                                  |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
        | text_distance  | Distance from the edge and its text.              | ``float`` or ``int``   | ``4``                            |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
        | text_parallel  | If ``True`` the text will be drawn parallel to    | ``bool``               | ``True``                         |
        |                | the edges.                                        |                        |                                  |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
        | font_family    | Font family used to draw the text.                | ``str``                | ``"serif"``                      |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
        | font_slant     | Font slant used to draw the text.                 | ``cairo.FONT_SLANT_*`` | :data:`cairo.FONT_SLANT_NORMAL`  |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
        | font_weight    | Font weight used to draw the text.                | ``cairo.FONT_WEIGHT_*``| :data:`cairo.FONT_WEIGHT_NORMAL` |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
        | font_size      | Font size used to draw the text.                  | ``float`` or ``int``   | ``12``                           |
        +----------------+---------------------------------------------------+------------------------+----------------------------------+
807
808
809

    Examples
    --------
810
811
812
813
814
815
816
    .. testcode::
       :hide:

       np.random.seed(42)
       gt.seed_rng(42)
       from numpy import sqrt

817
818
819
    >>> g = gt.price_network(1500)
    >>> deg = g.degree_property_map("in")
    >>> deg.a = 4 * (sqrt(deg.a) * 0.5 + 0.4)
820
821
    >>> ebet = gt.betweenness(g)[1]
    >>> ebet.a /= ebet.a.max() / 10.
822
823
824
825
826
827
828
829
830
831
    >>> eorder = ebet.copy()
    >>> eorder.a *= -1
    >>> pos = gt.sfdp_layout(g)
    >>> control = g.new_edge_property("vector<double>")
    >>> for e in g.edges():
    ...     d = sqrt(sum((pos[e.source()].a - pos[e.target()].a) ** 2)) / 5
    ...     control[e] = [0.3, d, 0.7, d]
    >>> gt.graph_draw(g, pos=pos, vertex_size=deg, vertex_fill_color=deg, vorder=deg,
    ...               edge_color=ebet, eorder=eorder, edge_pen_width=ebet,
    ...               edge_control_points=control, # some curvy edges
832
833
834
    ...               output="graph-draw.pdf")
    <...>

835
836
837
838
839
840
841
842
843
    .. testcode::
       :hide:

       gt.graph_draw(g, pos=pos, vertex_size=deg, vertex_fill_color=deg, vorder=deg,
                     edge_color=ebet, eorder=eorder, edge_pen_width=ebet,
                     edge_control_points=control,
                     output="graph-draw.png")


844
845
846
    .. figure:: graph-draw.*
        :align: center

847
848
        SFDP force-directed layout of a Price network with 1500 nodes. The
        vertex size and color indicate the degree, and the edge color and width
849
        the edge betweenness centrality.
850
851
852

    """

Tiago Peixoto's avatar
Tiago Peixoto committed
853
854
855
856
857
858
859
860
861
    vprops = vprops.copy() if vprops is not None else {}
    eprops = eprops.copy() if eprops is not None else {}

    props, kwargs = parse_props("vertex", kwargs)
    vprops.update(props)
    props, kwargs = parse_props("edge", kwargs)
    eprops.update(props)

    if pos is None:
862
        if (g.num_vertices() > 2 and output is None and
863
            not inline and kwargs.get("update_layout", True)):
Tiago Peixoto's avatar
Tiago Peixoto committed
864
865
866
867
868
869
870
871
872
            L = np.sqrt(g.num_vertices())
            pos = random_layout(g, [L, L])
            if g.num_vertices() > 1000:
                if "multilevel" not in kwargs:
                    kwargs["multilevel"] = True
            if "layout_K" not in kwargs:
                kwargs["layout_K"] = _avg_edge_distance(g, pos) / 10
        else:
            pos = sfdp_layout(g)
873
874
    else:
        _check_prop_vector(pos, name="pos", floating=True)
875
        if output is None and not inline:
876
877
878
879
            if "layout_K" not in kwargs:
                kwargs["layout_K"] = _avg_edge_distance(g, pos)
            if "update_layout" not in kwargs:
                kwargs["update_layout"] = False
Tiago Peixoto's avatar
Tiago Peixoto committed
880

881
882
883
884
885
886
887
888
    if "pen_width" in eprops and "marker_size" not in eprops:
        pw = eprops["pen_width"]
        if isinstance(pw, PropertyMap):
            pw = pw.copy()
            pw.a = pw.a * 2.75
            eprops["marker_size"] = pw
        else:
            eprops["marker_size"] = pw * 2.75
889

890
891
892
893
894
895
896
897
898
    if "text" in eprops and "text_distance" not in eprops and "pen_width" in eprops:
        pw = eprops["pen_width"]
        if isinstance(pw, PropertyMap):
            pw = pw.copy()
            pw.a *= 2
            eprops["text_distance"] = pw
        else:
            eprops["text_distance"] = pw * 2

899
    if "text" in vprops and ("text_color" not in vprops or vprops["text_color"] == "auto"):
900
901
        vcmap = kwargs.get("vcmap", matplotlib.cm.jet)
        bg = _convert(vertex_attrs.fill_color, vprops.get("fill_color", _vdefaults["fill_color"]), vcmap)
902
903
904
905
906
907
908
909
910
        if "bg_color" in kwargs:
            bg_color = kwargs["bg_color"]
        else:
            bg_color = [1., 1., 1., 1.]
        vprops["text_color"] = auto_colors(g, bg,
                                           vprops.get("text_position",
                                                      _vdefaults["text_position"]),
                                           bg_color)

911
    if mplfig:
912
913
914
915
916
917
918
919
920
921
922
923
        ax = None
        if isinstance(mplfig, matplotlib.figure.Figure):
            ctr = ax = mplfig.gca()
        elif isinstance(mplfig, matplotlib.axes.Axes):
            ctr = ax = mplfig
        else:
            ctr = mplfig

        artist = GraphArtist(g, pos, vprops, eprops, vorder, eorder, nodesfirst,
                             ax, **kwargs)
        ctr.artists.append(artist)

924
925
926
927
928
929
930
931
932
        if fit_view != False and ax is not None:
            try:
                x, y, w, h = fit_view
            except TypeError:
                x, y = ungroup_vector_property(pos, [0, 1])
                l, r = x.a.min(), x.a.max()
                b, t = y.a.min(), y.a.max()
                w = r - l
                h = t - b
933
934
935
936
            ax.set_xlim(l - w * .1, r + w * .1)
            ax.set_ylim(b - h * .1, t + h * .1)

        return pos
937

938
939
    if inline:
        if fmt == "auto":
940
941
942
943
944
            if output is None:
                fmt = "png"
            else:
                fmt = get_file_fmt(output)
        output_file = output
945
946
        output = io.BytesIO()

947
    if output is None:
948
949
950
951
952
953
954
955
        for p, val in vprops.items():
            if isinstance(val, PropertyMap):
                vprops[p] = _convert(vertex_attrs.__dict__[p], val,
                                     kwargs.get("vcmap", default_cm))
        for p, val in eprops.items():
            if isinstance(val, PropertyMap):
                eprops[p] = _convert(edge_attrs.__dict__[p], val,
                                     kwargs.get("ecmap", default_cm))
Tiago Peixoto's avatar
Tiago Peixoto committed
956
957
958
        return interactive_window(g, pos, vprops, eprops, vorder, eorder,
                                  nodesfirst, **kwargs)
    else:
959
960
961
962
963
964
        if isinstance(output, str):
            out, auto_fmt = open_file(output, mode="wb")
        else:
            out = output
            if fmt == "auto":
                raise ValueError("File format must be specified.")
Tiago Peixoto's avatar
Tiago Peixoto committed
965
966

        if fmt == "auto":
967
            fmt = auto_fmt
Tiago Peixoto's avatar
Tiago Peixoto committed
968
969
970
971
        if fmt == "pdf":
            srf = cairo.PDFSurface(out, output_size[0], output_size[1])
        elif fmt == "ps":
            srf = cairo.PSSurface(out, output_size[0], output_size[1])
Tiago Peixoto's avatar
Tiago Peixoto committed
972
973
974
        elif fmt == "eps":
            srf = cairo.PSSurface(out, output_size[0], output_size[1])
            srf.set_eps(True)
Tiago Peixoto's avatar
Tiago Peixoto committed
975
976
977
978
979
980
981
982
983
984
985
        elif fmt == "svg":
            srf = cairo.SVGSurface(out, output_size[0], output_size[1])
        elif fmt == "png":
            srf = cairo.ImageSurface(cairo.FORMAT_ARGB32, output_size[0],
                                     output_size[1])
        else:
            raise ValueError("Invalid format type: " + fmt)

        cr = cairo.Context(srf)

        adjust_default_sizes(g, output_size, vprops, eprops)
986
987
988
989
990
991
992
993
994
995
996
997
998
999
        if fit_view != False:
            try:
                x, y, w, h = fit_view
                offset, zoom = [0, 0], 1
            except TypeError:
                offset, zoom = fit_to_view(g, pos, output_size, vprops["size"],
                                           vprops["pen_width"], None,
                                           vprops.get("text", None),
                                           vprops.get("font_family",
                                                      _vdefaults["font_family"]),
                                           vprops.get("font_size",
                                                      _vdefaults["font_size"]),
                                           cr)
                fit_view = False
Tiago Peixoto's avatar
Tiago Peixoto committed
1000
        else: