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Add Windows drive example command module
This module demonstrates how to use Dragonfly to create a voice command for opening any currently active Windows drive in a new explorer window. It also demonstrates how to use Dragonfly's dynamic list feature.
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# | ||
# This file is part of Dragonfly. | ||
# (c) Copyright 2023 by Dane Finlay | ||
# Licensed under the LGPL. | ||
# | ||
# Dragonfly is free software: you can redistribute it and/or modify it | ||
# under the terms of the GNU Lesser General Public License as published | ||
# by the Free Software Foundation, either version 3 of the License, or | ||
# (at your option) any later version. | ||
# | ||
# Dragonfly is distributed in the hope that it will be useful, but | ||
# WITHOUT ANY WARRANTY; without even the implied warranty of | ||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
# Lesser General Public License for more details. | ||
# | ||
# You should have received a copy of the GNU Lesser General Public | ||
# License along with Dragonfly. If not, see | ||
# <http://www.gnu.org/licenses/>. | ||
# | ||
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""" | ||
This module demonstrates how to use Dragonfly to create a voice command | ||
for opening any currently active Windows drive in a new explorer window. | ||
This module constrains the list of drive letters to active ones through | ||
use of Dragonfly's dynamic lists. Dynamic lists allow the user to | ||
change parts of spoken commands without having to reload the grammar. | ||
""" | ||
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import subprocess | ||
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import win32api | ||
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from dragonfly import (Grammar, CompoundRule, List, ListRef) | ||
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#--------------------------------------------------------------------------- | ||
# Create a compound rule for opening Windows drives in Windows explorer. | ||
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class OpenDriveRule(CompoundRule): | ||
# Define the command to be spoken. | ||
spec = "open <drive_letter> drive" | ||
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# Define a dynamic list *drive_letters*, to be populated later. | ||
drive_letters_list = List("drive_letters") | ||
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# Define extras that are part of the compound rule specification. | ||
# These are the parts of *spec* in angled brackets. In this case, the | ||
# extra is a reference to the dynamic list defined above. | ||
extras = [ | ||
ListRef("drive_letter", drive_letters_list) | ||
] | ||
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def _process_begin(self): | ||
# Retrieve a list of the system's current logical drives. | ||
system_drive_letters = win32api.GetLogicalDriveStrings() | ||
system_drive_letters = system_drive_letters.split(":\\\x00")[0:-1] | ||
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# Do nothing further if the logical drive list has not changed. | ||
drive_letters_list = self.drive_letters_list | ||
if drive_letters_list == system_drive_letters: return | ||
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# Update the dynamic *drive_letters* list to include only the | ||
# currently active letters. Use the context manager ('with') as | ||
# an optimization; this ensures only one list update. | ||
with drive_letters_list: | ||
drive_letters_list.clear() | ||
drive_letters_list.extend(system_drive_letters) | ||
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def _process_recognition(self, node, extras): | ||
# Retrieve the spoken drive letter. | ||
drive_letter = extras.get("drive_letter") | ||
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# Open a Windows explorer window at the specified drive. | ||
subprocess.Popen(["explorer.exe", drive_letter + ":"]) | ||
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open_drive_rule = OpenDriveRule() | ||
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#--------------------------------------------------------------------------- | ||
# Create this module's grammar. | ||
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grammar = Grammar("Windows drive example") | ||
grammar.add_rule(open_drive_rule) | ||
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#--------------------------------------------------------------------------- | ||
# Load the grammar instance and define how to unload it. | ||
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grammar.load() | ||
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# Unload function which will be called by natlink at unload time. | ||
def unload(): | ||
global grammar | ||
if grammar: grammar.unload() | ||
grammar = None |