diff options
Diffstat (limited to 'test/test_pygtk.py')
| -rwxr-xr-x | test/test_pygtk.py | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/test/test_pygtk.py b/test/test_pygtk.py new file mode 100755 index 0000000..fc19fa9 --- /dev/null +++ b/test/test_pygtk.py @@ -0,0 +1,193 @@ +#!/usr/bin/env python2 +#------------------------------------------------------------------------ +# Copyright 2008-2009 (c) Jeff Brown <spadix@users.sourceforge.net> +# +# This file is part of the ZBar Bar Code Reader. +# +# The ZBar Bar Code Reader is free software; you can redistribute it +# and/or modify it under the terms of the GNU Lesser Public License as +# published by the Free Software Foundation; either version 2.1 of +# the License, or (at your option) any later version. +# +# The ZBar Bar Code Reader 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 Public License for more details. +# +# You should have received a copy of the GNU Lesser Public License +# along with the ZBar Bar Code Reader; if not, write to the Free +# Software Foundation, Inc., 51 Franklin St, Fifth Floor, +# Boston, MA 02110-1301 USA +# +# http://sourceforge.net/projects/zbar +#------------------------------------------------------------------------ +import sys, os, stat +import pygtk, gtk +import zbarpygtk + +def decoded(zbar, data): + """callback invoked when a barcode is decoded by the zbar widget. + displays the decoded data in the text box + """ + buf = results.props.buffer + end = buf.get_end_iter() + buf.insert(end, data + "\n") + results.scroll_to_iter(end, 0) + +def video_enabled(zbar, param): + """callback invoked when the zbar widget enables or disables + video streaming. updates the status button state to reflect the + current video state + """ + enabled = zbar.get_video_enabled() + if status_button.get_active() != enabled: + status_button.set_active(enabled) + +def video_opened(zbar, param): + """callback invoked when the zbar widget opens or closes a video + device. also called when a device is closed due to error. + updates the status button state to reflect the current video state + """ + opened = zbar.get_video_opened() + status_button.set_sensitive(opened) + set_status_label(opened, zbar.get_video_enabled()) + +def video_changed(widget): + """callback invoked when a new video device is selected from the + drop-down list. sets the new device for the zbar widget, + which will eventually cause it to be opened and enabled + """ + dev = video_list.get_active_text() + if dev[0] == '<': + dev = '' + zbar.set_video_device(dev) + +def status_button_toggled(button): + """callback invoked when the status button changes state + (interactively or programmatically). ensures the zbar widget + video streaming state is consistent and updates the display of the + button to represent the current state + """ + opened = zbar.get_video_opened() + active = status_button.get_active() + if opened and (active != zbar.get_video_enabled()): + zbar.set_video_enabled(active) + set_status_label(opened, active) + if active: + status_image.set_from_stock(gtk.STOCK_YES, gtk.ICON_SIZE_BUTTON) + else: + status_image.set_from_stock(gtk.STOCK_NO, gtk.ICON_SIZE_BUTTON) + +def open_button_clicked(button): + """callback invoked when the 'Open' button is clicked. pops up an + 'Open File' dialog which the user may use to select an image file. + if the image is successfully opened, it is passed to the zbar + widget which displays it and scans it for barcodes. results are + returned using the same hook used to report video results + """ + dialog = gtk.FileChooserDialog("Open Image File", window, + gtk.FILE_CHOOSER_ACTION_OPEN, + (gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL, + gtk.STOCK_OPEN, gtk.RESPONSE_ACCEPT)) + global open_file + if open_file: + dialog.set_filename(open_file) + try: + if dialog.run() == gtk.RESPONSE_ACCEPT: + open_file = dialog.get_filename() + pixbuf = gtk.gdk.pixbuf_new_from_file(open_file) + if pixbuf: + zbar.scan_image(pixbuf) + finally: + dialog.destroy() + +def set_status_label(opened, enabled): + """update status button label to reflect indicated state.""" + if not opened: + label = "closed" + elif enabled: + label = "enabled" + else: + label = "disabled" + status_button.set_label(label) + +open_file = None +video_device = None +if len(sys.argv) > 1: + video_device = sys.argv[1] + +# threads *must* be properly initialized to use zbarpygtk +gtk.gdk.threads_init() +gtk.gdk.threads_enter() + +window = gtk.Window() +window.set_title("test_pygtk") +window.set_border_width(8) +window.connect("destroy", gtk.main_quit) + +zbar = zbarpygtk.Gtk() +zbar.connect("decoded-text", decoded) + +# video device list combo box +video_list = gtk.combo_box_new_text() +video_list.connect("changed", video_changed) + +# enable/disable status button +status_button = gtk.ToggleButton("closed") +status_image = gtk.image_new_from_stock(gtk.STOCK_NO, gtk.ICON_SIZE_BUTTON) +status_button.set_image(status_image) +status_button.set_sensitive(False) + +# bind status button state and video state +status_button.connect("toggled", status_button_toggled) +zbar.connect("notify::video-enabled", video_enabled) +zbar.connect("notify::video-opened", video_opened) + +# open image file button +open_button = gtk.Button(stock=gtk.STOCK_OPEN) +open_button.connect("clicked", open_button_clicked) + +# populate video devices in combo box +video_list.append_text("<none>") +video_list.set_active(0) +for (root, dirs, files) in os.walk("/dev"): + for dev in files: + path = os.path.join(root, dev) + if not os.access(path, os.F_OK): + continue + info = os.stat(path) + if stat.S_ISCHR(info.st_mode) and os.major(info.st_rdev) == 81: + video_list.append_text(path) + if path == video_device: + video_list.set_active(len(video_list.get_model()) - 1) + video_device = None + +if video_device is not None: + video_list.append_text(video_device) + video_list.set_active(len(video_list.get_model()) - 1) + video_device = None + +# combine combo box and buttons horizontally +hbox = gtk.HBox(spacing=8) +hbox.pack_start(video_list) +hbox.pack_start(status_button, expand=False) +hbox.pack_start(open_button, expand=False) + +# text box for holding results +results = gtk.TextView() +results.set_size_request(320, 64) +results.props.editable = results.props.cursor_visible = False +results.set_left_margin(4) + +# combine inputs, scanner, and results vertically +vbox = gtk.VBox(spacing=8) +vbox.pack_start(hbox, expand=False) +vbox.pack_start(zbar) +vbox.pack_start(results, expand=False) + +window.add(vbox) +window.set_geometry_hints(zbar, min_width=320, min_height=240) +window.show_all() + +gtk.main() +gtk.gdk.threads_leave() |