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|
""" Charm - the model for a simple Python IDE. """
# Enthought library imports.
from enthought.envisage.developer.api import CodeBrowser, Module
from enthought.traits.api import Event, HasTraits, Instance, Str
class Charm(HasTraits):
""" Charm - the model for a simple Python IDE. """
#### 'Charm' interface ####################################################
# The code browser.
code_browser = Instance(CodeBrowser)
# The filename of the code database.
filename = Str('code_database.pickle')
# The current module.
module = Instance(Module)
#### Events ####
# Fired when a module is about to be parsed.
parsing_module = Event
# Fired when a module has been parsed.
parsed_module = Event
###########################################################################
# 'Charm' interface.
###########################################################################
#### Trait initializers ###################################################
def _code_browser_default(self):
""" Trait initializer. """
code_browser = CodeBrowser(filename=self.filename)
self._setup_code_browser(code_browser)
return code_browser
#### Methods ##############################################################
def load(self):
""" Loads the code database. """
self.code_browser.load()
return
def save(self):
""" Saves the code database. """
self.code_browser.save()
return
###########################################################################
# Private interface.
###########################################################################
def _setup_code_browser(self, code_browser):
""" Adds trait change listeners to a code browser. """
code_browser.on_trait_change(self._on_parsing_module, 'parsing_module')
code_browser.on_trait_change(self._on_parsed_module, 'parsed_module')
return
def _tear_down_code_browser(self, code_browser):
""" Removes trait change listeners from a code browser. """
code_browser.on_trait_change(
self._on_parsing_module, 'parsing_module', remove=True
)
code_browser.on_trait_change(
self._on_parsed_module, 'parsed_module', remove=True
)
return
#### Trait change handlers ################################################
def _code_browser_changed(self, old, new):
""" Static trait change handler. """
if old is not None:
self._tear_down_code_browser(old)
if new is not None:
self._setup_code_browser(new)
return
def _filename_changed(self, old, new):
""" Static trait change handler. """
self.code_browser.filename = new
return
def _on_parsing_module(self, event):
""" Dysnamic trait change handler. """
self.parsing_module = event
return
def _on_parsed_module(self, event):
""" Dysnamic trait change handler. """
self.parsed_module = event
return
#### EOF ######################################################################
|
