ImageScanner/ImageScanner.py at master · jakm/ImageScanner · GitHub

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#!/usr/bin/env python
# -*- coding: utf8 -*-

import pygtk
pygtk.require20()
import gtk
import gobject

from datetime import datetime
import os.path
import sys

import imagescanner
import imagescanner.events

if sys.platform in ('win32', 'cygwin'):
    from imagescanner.backends.twain import twain as _twain

# imagescanner setup
imagescanner.settings.ENABLE_NET_BACKEND = False
imagescanner.settings.ENABLE_TEST_BACKEND = False

class ImageScanner(object):
    def __init__(self):
        builder = gtk.Builder()
        builder.add_from_file('Resources/MainWindow.glade')

        signals = { 'on_scanBtn_clicked' : self.on_scanBtn_clicked,
                    'on_loadBtn_clicked' : self.on_loadBtn_clicked }
        builder.connect_signals(signals)

        self.main_window = builder.get_object('mainWindow')
        self.main_window.connect('destroy', gtk.main_quit)

        self.scanner_combo = builder.get_object('scannerCombo')
        self.target_dir_btn = builder.get_object('targetDirBtn')
        self.dpi_combo = builder.get_object('dpiCombo')
        self.format_combo = builder.get_object('formatCombo')

        self.scanners = {}

        self.main_window.show_all()

    def main(self):
        try:
            gtk.main()
        except BaseException as e:
            # uklid
            raise

    def on_scanBtn_clicked(self, widget, data = None):
        try:
            self.main_window.set_sensitive(False)

            scanner_name = self.__get_active_item(self.scanner_combo)
            if scanner_name == None:
                self.__show_error('Vyberte skener z nabídky.')
                return
            scanner = self.scanners[scanner_name]

            dpi = self.__get_active_item(self.dpi_combo)
            form = self.__get_active_item(self.format_combo)

            target_dir = self.target_dir_btn.get_current_folder()
            if target_dir == None:
                self.__show_error('Vyberte cílový adresář.')
                return
            target_dir = target_dir.decode('utf8')

            image = self.__scan_image(scanner, dpi)
            self.__store_image(target_dir, image, form)
        finally:
            self.main_window.set_sensitive(True)

    def on_loadBtn_clicked(self, widget, data = None):
        try:
            self.main_window.set_sensitive(False)

            try:
                self.__load_scanners()
            except Exception as e:
                self.__show_error('Chyba při načítání dostupných skenerů:\n\n' + str(e))

            self.__set_scanners_to_model()
        finally:
            self.main_window.set_sensitive(True)

    def __load_scanners(self):
        iscan = imagescanner.ImageScanner()
        scanners = iscan.list_scanners()
        for scanner in scanners:
            if scanner.name not in self.scanners:
                self.scanners[scanner.name] = scanner
            else:
                self.scanners[scanner.id] = scanner

    def __set_scanners_to_model(self):
        if len(self.scanners) == 0:
            return
        model = self.scanner_combo.get_model()
        for scanner_name in self.scanners.keys():
            model.append([scanner_name])

    def __show_error(self, message):
        dialog = gtk.MessageDialog(parent=self.main_window, type=gtk.MESSAGE_ERROR, buttons=gtk.BUTTONS_OK, message_format=message)
        dialog.run()
        dialog.destroy()

    def __get_active_item(self, combo):
        model = combo.get_model()
        active = combo.get_active()
        if (active < 0):
            return None
        return model[active][0]

    def __scan_image(self, scanner, dpi):
        self.__set_scanner_settings(scanner, dpi)
        image = scanner.scan(dpi)
        self.__remove_scanner_settings(scanner)
        return image

    def __set_scanner_settings(self, scanner, dpi):
        if sys.platform in ('win32', 'cygwin'):
            def set_capability(ea):
                dev = ea.event_data # scanner device
                dev.SetCapability(_twain.ICAP_PIXELTYPE, _twain.TWTY_UINT16, _twain.TWPT_RGB)
        elif sys.platform in ('linux2'):
            def set_capability(ea):
                dev = ea.event_data # scanner device
                dev.resolution = int(dpi)

        if set_capability:
            scanner.bind(imagescanner.events.SCAN_BEFORE_EVENT, set_capability)

    def __remove_scanner_settings(self, scanner):
        if sys.platform in ('win32', 'cygwin', 'linux2'):
            scanner.unbind(imagescanner.events.SCAN_BEFORE_EVENT)

    def __store_image(self, target_dir, image, img_format):
        path = self.__build_path(target_dir, img_format)
        while os.path.exists(path):
            path = self.__build_path(target_dir, img_format)
        image.save(path, img_format)

    def __build_path(self, target_dir, img_format):
        now = datetime.now()
        filename = 'Scanned_at_%s.%s' % (now.strftime('%Y-%m-%d_%H-%M-%S'), img_format.lower())
        return os.path.join(target_dir, filename)

if __name__ == '__main__':
    gui = ImageScanner()
    gui.main()