Source code for pm4py.visualization.bpmn.variants.classic

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from pm4py.util import exec_utils
from enum import Enum
import tempfile
from graphviz import Digraph
from typing import Optional, Dict, Any, Union, Tuple
from pm4py.objects.bpmn.obj import BPMN
from pm4py.util import typing
import graphviz

[docs]class Parameters(Enum): FORMAT = "format" RANKDIR = "rankdir" FONT_SIZE = "font_size" BGCOLOR = "bgcolor"
[docs]def apply(bpmn_graph: BPMN, parameters: Optional[Dict[Any, Any]] = None) -> graphviz.Digraph: """ Visualize a BPMN graph Parameters ------------- bpmn_graph BPMN graph parameters Parameters of the visualization, including: - Parameters.FORMAT: the format of the visualization - Parameters.RANKDIR: the direction of the representation (default: LR) Returns ------------ gviz Graphviz representation """ if parameters is None: parameters = {} from pm4py.objects.bpmn.obj import BPMN from pm4py.objects.bpmn.util.sorting import get_sorted_nodes_edges image_format = exec_utils.get_param_value(Parameters.FORMAT, parameters, "png") rankdir = exec_utils.get_param_value(Parameters.RANKDIR, parameters, "LR") font_size = exec_utils.get_param_value(Parameters.FONT_SIZE, parameters, 12) font_size = str(font_size) bgcolor = exec_utils.get_param_value(Parameters.BGCOLOR, parameters, "transparent") filename = tempfile.NamedTemporaryFile(suffix='.gv') viz = Digraph("",, engine='dot', graph_attr={'bgcolor': bgcolor}) viz.graph_attr['rankdir'] = rankdir nodes, edges = get_sorted_nodes_edges(bpmn_graph) for n in nodes: n_id = str(id(n)) if isinstance(n, BPMN.Task): viz.node(n_id, shape="box", label=n.get_name(), fontsize=font_size) elif isinstance(n, BPMN.StartEvent): viz.node(n_id, label="", shape="circle", style="filled", fillcolor="green", fontsize=font_size) elif isinstance(n, BPMN.EndEvent): viz.node(n_id, label="", shape="circle", style="filled", fillcolor="orange", fontsize=font_size) elif isinstance(n, BPMN.ParallelGateway): viz.node(n_id, label="+", shape="diamond", fontsize=font_size) elif isinstance(n, BPMN.ExclusiveGateway): viz.node(n_id, label="X", shape="diamond", fontsize=font_size) elif isinstance(n, BPMN.InclusiveGateway): viz.node(n_id, label="O", shape="diamond", fontsize=font_size) else: viz.node(n_id, label="", shape="circle", fontsize=font_size) for e in edges: n_id_1 = str(id(e[0])) n_id_2 = str(id(e[1])) viz.edge(n_id_1, n_id_2) viz.attr(overlap='false') viz.format = image_format return viz