help_provider.py

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# Copyright (c) 2011, Dirk Thomas, Dorian Scholz, TU Darmstadt
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import webbrowser

from python_qt_binding.QtCore import QObject, Slot
from rospkg import InvalidManifest, MANIFEST_FILE, parse_manifest_file

from .ros_package_helper import get_package_path


class HelpProvider(QObject):

    """Handler for the help action in the title bar of dock widgets."""

    def __init__(self):
        super(HelpProvider, self).__init__()

    @Slot(object)
    def plugin_help_request(self, plugin_descriptor):
        package_name = plugin_descriptor.attributes()['package_name']
        package_path = get_package_path(package_name)
        try:
            manifest = parse_manifest_file(package_path, MANIFEST_FILE)
        except (InvalidManifest, IOError):
            return
        webbrowser.open(manifest.url)