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add hatches to nodes #97

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add hatches to nodes #97

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16 changes: 14 additions & 2 deletions netgraph/_graph_classes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@
_make_pretty,
_rank,
_normalize_numeric_argument,
_normalize_string_argument,
_normalize_color_argument,
_normalize_shape_argument,
_rescale_dict_values,
Expand Down Expand Up @@ -113,6 +114,12 @@ class BaseGraph(object):
If the type is dict, maps each node to an individual size.

.. note:: Values are rescaled by :py:const:`BASE_SCALE` (0.01) to be compatible with layout routines in igraph and networkx.
node_hatch : str or dict, default ""
Node hatch pattern.
If the type is str, all nodes have the same hatch pattern.
If the type is dict, maps each node to an individual hatch pattern.

Refer to https://matplotlib.org/stable/gallery/shapes_and_collections/hatch_style_reference.html for available hatch patterns.

node_edge_width : float or dict, default 0.5
Line width of node marker border.
Expand Down Expand Up @@ -262,6 +269,7 @@ def __init__(self, edges,
node_layout_kwargs=None,
node_shape='o',
node_size=3.,
node_hatch="",
node_edge_width=0.5,
node_color='w',
node_edge_color=DEFAULT_COLOR,
Expand Down Expand Up @@ -298,6 +306,7 @@ def __init__(self, edges,
# Convert all node and edge parameters to dictionaries.
node_shape = _normalize_shape_argument(node_shape, self.nodes, 'node_shape')
node_size = _normalize_numeric_argument(node_size, self.nodes, 'node_size')
node_hatch = _normalize_string_argument(node_hatch, self.nodes, 'node_hatch')
node_edge_width = _normalize_numeric_argument(node_edge_width, self.nodes, 'node_edge_width')
node_color = _normalize_color_argument(node_color, self.nodes, 'node_color')
node_edge_color = _normalize_color_argument(node_edge_color, self.nodes, 'node_edge_color')
Expand All @@ -323,7 +332,7 @@ def __init__(self, edges,
node_layout, node_layout_kwargs)
self.node_artists = dict()
self.draw_nodes(self.nodes, self.node_positions,
node_shape, self.node_size, node_edge_width,
node_shape, self.node_size, node_hatch, node_edge_width,
node_color, node_edge_color, node_alpha, node_zorder)

self.edge_layout = self._initialize_edge_layout(edge_layout, edge_layout_kwargs)
Expand Down Expand Up @@ -519,7 +528,7 @@ def _initialize_axis(self, ax):
raise TypeError(f"Variable 'ax' either None or a matplotlib axis instance. However, type(ax) is {type(ax)}.")


def draw_nodes(self, nodes, node_positions, node_shape, node_size,
def draw_nodes(self, nodes, node_positions, node_shape, node_size, node_hatch,
node_edge_width, node_color, node_edge_color, node_alpha,
node_zorder):
"""Draw or update node artists.
Expand All @@ -535,6 +544,8 @@ def draw_nodes(self, nodes, node_positions, node_shape, node_size,
Specification is as for matplotlib.scatter marker, i.e. one of 'so^>v<dph8'.
node_size : dict
Mapping of nodes to sizes.
node_hatch : dict
Mapping of nodes to hatch patterns.
node_edge_width : dict
Mapping of nodes to marker edge widths.
node_color : dict
Expand All @@ -558,6 +569,7 @@ def draw_nodes(self, nodes, node_positions, node_shape, node_size,
kwargs = dict(
xy = node_positions[node],
size = node_size[node],
hatch = node_hatch[node],
facecolor = node_color[node],
edgecolor = node_edge_color[node],
linewidth = node_edge_width[node],
Expand Down