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"""
Code related to traits UI menu items for the tree view of mayavi.
"""
# Author: Prabhu Ramachandran <prabhu@aero.iitb.ac.in>
# Copyright (c) 2008-2020, Prabhu Ramachandran Enthought, Inc.
# License: BSD Style.
# Standard library imports.
from os.path import splitext, isfile
# Enthought library imports.
from traits.api import HasTraits, Any, List
from traitsui.menu import Action, Menu
from pyface.api import FileDialog, OK, GUI
# Local imports.
from mayavi.core.registry import registry
from mayavi.core.common import error, get_engine
################################################################################
# `MenuHelper` class.
################################################################################
class MenuHelper(HasTraits):
# The object this menu generates the menus for.
object = Any
# The actions this helper generates.
actions = List()
######################################################################
# Public interface.
######################################################################
def check_active(self, metadata):
"""Check if the `metadata` passed can be added to `self.object`.
"""
# FIXME: This should also have logic for checking the attributes
# and attribute_types.
output_info = self.object.output_info
input_info = metadata.input_info
if output_info is None:
return True
elif input_info is None:
return True
output_datasets = output_info.datasets
input_datasets = input_info.datasets
if 'none' in output_datasets:
return False
if 'any' in input_datasets:
return True
for d in input_datasets:
if d in output_datasets:
return True
return False
def open_file_action(self):
wildcard = 'All files (*.*)|*.*'
for src in registry.sources:
if len(src.extensions) > 0:
if wildcard.endswith('|') or \
src.wildcard.startswith('|'):
wildcard += src.wildcard
else:
wildcard += '|' + src.wildcard
dialog = FileDialog(parent=None,
title='Open supported data file',
action='open', wildcard=wildcard
)
if dialog.open() == OK:
if not isfile(dialog.path):
error("File '%s' does not exist!"%dialog.path)
return
# FIXME: Ask for user input if a filetype is unknown and
# choose appropriate reader.
object = self.object
engine = get_engine(object)
engine.open(dialog.path, object)
######################################################################
# Non-public interface.
######################################################################
def _create_source(self, metadata, select=True):
"""Create source object given its metadata. If `select` is
`True` make the created object the active selection.
"""
callable = metadata.get_callable()
obj = callable()
parent = self.object
engine = get_engine(parent)
engine.add_source(obj, parent)
if select:
self._make_active(obj)
def _create_object(self, metadata, select=True):
"""Create mayavi pipeline object given its metadata. If
`select` is `True` make the created object the active selection.
"""
callable = metadata.get_callable()
obj = callable()
parent = self.object
engine = get_engine(parent)
engine.add_filter(obj, parent)
if select:
self._make_active(obj)
def _make_active(self, obj):
"""Make the object given, `obj`, the current selection of the
engine."""
engine = get_engine(obj)
if engine is not None:
# This is required when running mayavi in envisage.
GUI.set_trait_later(engine, 'current_selection', obj)
else:
print("No engine")
def _build_source_actions(self):
actions = []
a = Action(name='Open File ...',
action='object.menu_helper.open_file_action',
tooltip='Open a supported data file')
actions.append(a)
for src in registry.sources:
if len(src.extensions) == 0:
# The method that creates the source.
setattr(self, src.id,
lambda self=self, md=src, select=True:
self._create_source(md, select))
a = Action(name=src.menu_name,
action='object.menu_helper.'+src.id,
tooltip=src.tooltip)
actions.append(a)
return actions
def _build_filter_actions(self):
actions = []
for fil in registry.filters:
# The method that creates the object.
setattr(self, fil.id,
lambda self=self, md=fil, select=True:
self._create_object(md, select))
# The method that checks if the menu can be activated or
# not.
setattr(self, 'check_' + fil.id,
lambda self=self, md=fil: self.check_active(md))
a = Action(name=fil.menu_name,
action='object.menu_helper.' + fil.id,
enabled_when='object.menu_helper.check_%s()'%fil.id,
tooltip=fil.tooltip)
actions.append(a)
return actions
def _build_module_actions(self):
actions = []
for mod in registry.modules:
# The method that creates the module.
setattr(self, mod.id,
lambda self=self, md=mod, select=True:
self._create_object(md, select))
# The method that checks if the menu can be activated or
# not.
setattr(self, 'check_' + mod.id,
lambda self=self, md=mod: self.check_active(md))
a = Action(name=mod.menu_name,
action='object.menu_helper.' + mod.id,
enabled_when='object.menu_helper.check_%s()'%mod.id,
tooltip=mod.tooltip)
actions.append(a)
return actions
################################################################################
# `SourceMenuHelper` class.
################################################################################
class SourceMenuHelper(MenuHelper):
def _actions_default(self):
actions = self._build_source_actions()
return [Menu(name='Add Source', *actions)]
################################################################################
# `FilterMenuHelper` class.
################################################################################
class FilterMenuHelper(MenuHelper):
def _actions_default(self):
filter_actions = self._build_filter_actions()
module_actions = self._build_module_actions()
return [Menu(name='Add Filter', *filter_actions),
Menu(name='Add Module', *module_actions)]
################################################################################
# `ModuleMenuHelper` class.
################################################################################
class ModuleMenuHelper(MenuHelper):
def _actions_default(self):
module_actions = self._build_module_actions()
return [Menu(name='Add Module', *module_actions)]
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