app_chooser_dialog.py

#!/usr/bin/env python
# All rights waived: https://creativecommons.org/publicdomain/zero/1.0/
# Andrew Chadwick, 29 Jan 2016.

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from gi.repository import Gio

import os
import os.path

import logging
logger = logging.getLogger(__name__)


def _main():
    flags = Gtk.DialogFlags.MODAL | Gtk.DialogFlags.USE_HEADER_BAR
    parent = None
    filename = os.path.join(
        os.getcwd(),
        "desktop/icons/hicolor/512x512/apps/mypaint.png",
    )
    logger.info("filename: %r", filename)
    gfile = Gio.File.new_for_path(filename)
    app_dialog = Gtk.AppChooserDialog.new(parent, flags, gfile)
    logger.info("Constructing dialog...")
    app_dialog.set_heading("MyPaint needs to open a file...")
    app_widget = app_dialog.get_widget()
    #app_widget.set_show_fallback(True)
    #app_widget.set_show_recommended(True)
    logger.info("Running dialog...")
    resp = Gtk.ResponseType(app_dialog.run())
    logger.info("Dialog response: %r", resp)
    positive_resps = [Gtk.ResponseType.OK]
    negative_resps = [Gtk.ResponseType.CANCEL, Gtk.ResponseType.DELETE_EVENT]
    if resp in positive_resps:
        logger.info("User selected an app")
        app_info = app_dialog.get_app_info()
        logger.info("User chose: %r", app_info.get_name())
    elif resp in negative_resps:
        logger.info("User cancelled dialog")
    else:
        logger.warning("Unexpected response from dialog: %r", resp)


if __name__ == "__main__":
    logging.basicConfig(level = logging.DEBUG)
    _main()