5081c97ac5
- built in Christian Gavin's os.listdir replacement - added os.isdir replacement Fixed ViewBox causing errors at shutdown
103 lines
3.2 KiB
Python
103 lines
3.2 KiB
Python
# -*- coding: utf-8 -*-
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from pyqtgraph.pgcollections import OrderedDict
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from pyqtgraph import importModules
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import os, types
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from pyqtgraph.debug import printExc
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from ..Node import Node
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import pyqtgraph.reload as reload
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NODE_LIST = OrderedDict() ## maps name:class for all registered Node subclasses
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NODE_TREE = OrderedDict() ## categorized tree of Node subclasses
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def getNodeType(name):
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try:
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return NODE_LIST[name]
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except KeyError:
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raise Exception("No node type called '%s'" % name)
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def getNodeTree():
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return NODE_TREE
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def registerNodeType(cls, paths, override=False):
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"""
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Register a new node type. If the type's name is already in use,
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an exception will be raised (unless override=True).
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Arguments:
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cls - a subclass of Node (must have typ.nodeName)
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paths - list of tuples specifying the location(s) this
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type will appear in the library tree.
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override - if True, overwrite any class having the same name
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"""
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if not isNodeClass(cls):
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raise Exception("Object %s is not a Node subclass" % str(cls))
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name = cls.nodeName
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if not override and name in NODE_LIST:
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raise Exception("Node type name '%s' is already registered." % name)
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NODE_LIST[name] = cls
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for path in paths:
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root = NODE_TREE
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for n in path:
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if n not in root:
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root[n] = OrderedDict()
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root = root[n]
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root[name] = cls
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def isNodeClass(cls):
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try:
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if not issubclass(cls, Node):
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return False
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except:
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return False
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return hasattr(cls, 'nodeName')
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def loadLibrary(reloadLibs=False, libPath=None):
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"""Import all Node subclasses found within files in the library module."""
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global NODE_LIST, NODE_TREE
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#if libPath is None:
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#libPath = os.path.dirname(os.path.abspath(__file__))
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if reloadLibs:
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reload.reloadAll(libPath)
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mods = importModules('', globals(), locals())
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#for f in frozenSupport.listdir(libPath):
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#pathName, ext = os.path.splitext(f)
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#if ext not in ('.py', '.pyc') or '__init__' in pathName or '__pycache__' in pathName:
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#continue
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#try:
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##print "importing from", f
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#mod = __import__(pathName, globals(), locals())
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#except:
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#printExc("Error loading flowchart library %s:" % pathName)
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#continue
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for name, mod in mods.items():
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nodes = []
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for n in dir(mod):
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o = getattr(mod, n)
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if isNodeClass(o):
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#print " ", str(o)
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registerNodeType(o, [(name,)], override=reloadLibs)
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#nodes.append((o.nodeName, o))
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#if len(nodes) > 0:
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#NODE_TREE[name] = OrderedDict(nodes)
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#NODE_LIST.extend(nodes)
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#NODE_LIST = OrderedDict(NODE_LIST)
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def reloadLibrary():
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loadLibrary(reloadLibs=True)
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loadLibrary()
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#NODE_LIST = []
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#for o in locals().values():
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#if type(o) is type(AddNode) and issubclass(o, Node) and o is not Node and hasattr(o, 'nodeName'):
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#NODE_LIST.append((o.nodeName, o))
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#NODE_LIST.sort(lambda a,b: cmp(a[0], b[0]))
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#NODE_LIST = OrderedDict(NODE_LIST) |