Add a patch of DCWorkflowGraph.

This is needed, because graph was not drawn.

product/ERP5Type/ZopePatch.py

@@ -28,6 +28,7 @@ from Products.ERP5Type.patches import PropertyManager
 from Products.ERP5Type.patches import TM
 from Products.ERP5Type.patches import DA
 from Products.ERP5Type.patches import DCWorkflow
+from Products.ERP5Type.patches import DCWorkflowGraph
 from Products.ERP5Type.patches import Worklists
 from Products.ERP5Type.patches import BTreeFolder2
 from Products.ERP5Type.patches import WorkflowTool

product/ERP5Type/patches/DCWorkflowGraph.py

+#########################################################################
+# This code is taken from Products.DCWorkflowGraph-0.4-py2.6.egg
+# http://pypi.python.org/pypi/Products.DCWorkflowGraph
+# Author: panjunyong (panjy at zopen.cn, from ZOpen) <panjy at zopen cn>
+# License: ZPL 
+# The license term should be this one: http://www.zope.org/Resources/ZPL
+#########################################################################
+
+try:
+    from Products.DCWorkflowGraph import DCWorkflowGraph
+    from Products.DCWorkflowGraph.DCWorkflowGraph import (
+        getPOT, mktemp, os, bin_search, DOT_EXE)
+except ImportError:
+    DCWorkflowGraph = None
+
+if DCWorkflowGraph is not None:
+    def getGraph(self, wf_id="", format="gif", REQUEST=None):
+        """show a workflow as a graph, copy from:
+    "OpenFlowEditor":http://www.openflow.it/wwwopenflow/Download/OpenFlowEditor_0_4.tgz
+        """
+        pot = getPOT(self, wf_id, REQUEST)
+        encoding = 'utf-8' #### PATCHED
+        pot = pot.encode(encoding)
+        infile = mktemp('.dot')
+        f = open(infile, 'w')
+        f.write(pot)
+        f.close()
+
+        if REQUEST is None:
+            REQUEST = self.REQUEST
+        response = REQUEST.RESPONSE
+
+        if format != 'dot':
+            outfile = mktemp('.%s' % format)
+            os.system('%s -T%s -o %s %s' % (bin_search(DOT_EXE), format, outfile, infile))
+            out = open(outfile, 'rb')
+            result = out.read()
+            out.close()
+            os.remove(outfile)
+            response.setHeader('Content-Type', 'image/%s' % format)
+        else:
+            result = open(infile, 'r').read()
+            filename = wf_id or self.getId()
+            response.setHeader('Content-Type', 'text/x-graphviz')
+            response.setHeader('Content-Disposition',
+                               'attachment; filename=%s.dot' % filename)
+
+        os.remove(infile)
+        return result
+    from Products.DCWorkflow.DCWorkflow import DCWorkflowDefinition
+    DCWorkflowDefinition.getGraph = getGraph