| 1 | #!/usr/bin/env python |
| 2 | # |
| 3 | # Author: Sascha Silbe <sascha-pgp@silbe.org> |
| 4 | # |
| 5 | # This program is free software; you can redistribute it and/or modify |
| 6 | # it under the terms of the GNU General Public License version 3 |
| 7 | # as published by the Free Software Foundation. |
| 8 | # |
| 9 | # This program is distributed in the hope that it will be useful, |
| 10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | # GNU General Public License for more details. |
| 13 | # |
| 14 | # You should have received a copy of the GNU General Public License |
| 15 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | """Scan: Import images using a document scanner. |
| 17 | """ |
| 18 | from __future__ import with_statement |
| 19 | |
| 20 | from gettext import lgettext as _ |
| 21 | from gettext import lngettext as ngettext |
| 22 | import logging |
| 23 | import math |
| 24 | import os |
| 25 | import sys |
| 26 | import tempfile |
| 27 | import time |
| 28 | |
| 29 | import gobject |
| 30 | import gtk |
| 31 | |
| 32 | import reportlab.pdfgen.canvas |
| 33 | from reportlab.lib import units |
| 34 | import sane |
| 35 | import threading |
| 36 | |
| 37 | from sugar.activity.widgets import ActivityToolbarButton, StopButton |
| 38 | from sugar.graphics.toggletoolbutton import ToggleToolButton |
| 39 | from sugar.activity import activity |
| 40 | from sugar.datastore import datastore |
| 41 | from sugar.graphics.toolbutton import ToolButton |
| 42 | from sugar.graphics.combobox import ComboBox |
| 43 | from sugar.graphics.toolbarbox import ToolbarButton, ToolbarBox |
| 44 | from sugar.graphics import style |
| 45 | from sugar.logger import trace |
| 46 | |
| 47 | |
| 48 | class SettingsToolbar(gtk.Toolbar): |
| 49 | |
| 50 | @trace() |
| 51 | def __init__(self): |
| 52 | gtk.Toolbar.__init__(self) |
| 53 | self._scanner = None |
| 54 | self.props.show_arrow = True |
| 55 | |
| 56 | def set_scanner(self, scanner): |
| 57 | self._scanner = scanner |
| 58 | self._clear() |
| 59 | if self._scanner: |
| 60 | self._add_options() |
| 61 | |
| 62 | def _clear(self): |
| 63 | for widget in list(self): |
| 64 | self.remove(widget) |
| 65 | |
| 66 | @trace() |
| 67 | def _get_groups(self): |
| 68 | group = [] |
| 69 | groups = [(None, group)] |
| 70 | options = self._scanner.get_options() |
| 71 | for idx, name, title, dsc_, _type, unit_, siz_, cap_, cons_ in options: |
| 72 | if _type == sane.TYPE_GROUP: |
| 73 | group = [] |
| 74 | groups.append((title, group)) |
| 75 | continue |
| 76 | |
| 77 | if not name and idx != 0: |
| 78 | logging.warning('ignoring unnamed option (index %d)', idx) |
| 79 | continue |
| 80 | |
| 81 | group.append(name) |
| 82 | |
| 83 | return groups |
| 84 | |
| 85 | def _add_options(self): |
| 86 | groups = self._get_groups() |
| 87 | name_map = dict([(self._scanner[py_name].name, py_name) |
| 88 | for py_name in self._scanner.optlist]) |
| 89 | |
| 90 | first_group = True |
| 91 | for group_name, group in groups: |
| 92 | if not group: |
| 93 | continue |
| 94 | |
| 95 | if first_group: |
| 96 | first_group = False |
| 97 | else: |
| 98 | self.insert(gtk.SeparatorToolItem(), -1) |
| 99 | |
| 100 | # TODO: handle SANE_CAP_ADVANCED and maybe other capabilities |
| 101 | # TODO: handle area by paper size presets + single fields in |
| 102 | # advanced options |
| 103 | |
| 104 | for option_name in group: |
| 105 | py_name = name_map[option_name] |
| 106 | option = self._scanner[py_name] |
| 107 | if not option.is_active(): |
| 108 | # FIXME: check SANE docs what inactive is used for |
| 109 | # I have a feeling we might need to cope with this |
| 110 | # changing after changing other settings like the mode |
| 111 | # (color/gray/...) |
| 112 | logging.warning('skipping inactive option %r', option_name) |
| 113 | continue |
| 114 | |
| 115 | value = getattr(self._scanner, py_name) |
| 116 | if (option.type == sane.TYPE_BOOL): |
| 117 | widget = self._add_bool(option, value) |
| 118 | elif (option.type == sane.TYPE_INT): |
| 119 | widget = self._add_integer(option, value) |
| 120 | elif (option.type == sane.TYPE_FIXED): |
| 121 | widget = self._add_fixed_point(option, value) |
| 122 | elif (option.type == sane.TYPE_STRING): |
| 123 | widget = self._add_string(option, value) |
| 124 | elif (option.type == sane.TYPE_BUTTON): |
| 125 | widget = self._add_action(option, value) |
| 126 | |
| 127 | if not widget: |
| 128 | continue |
| 129 | |
| 130 | widget.set_sensitive(option.is_settable()) |
| 131 | |
| 132 | # FIXME: take translation from SANE |
| 133 | label = gtk.Label(_(option.title)) |
| 134 | hbox = gtk.HBox(False, style.DEFAULT_SPACING) |
| 135 | hbox.pack_start(label, False) |
| 136 | hbox.pack_start(widget) |
| 137 | label.show() |
| 138 | |
| 139 | tool_item = gtk.ToolItem() |
| 140 | tool_item.add(hbox) |
| 141 | # FIXME: take translation from SANE |
| 142 | tool_item.set_tooltip_text(_(option.desc)) |
| 143 | # TODO: represent unit |
| 144 | self.insert(tool_item, -1) |
| 145 | |
| 146 | self.show_all() |
| 147 | |
| 148 | def _add_bool(self, option, value): |
| 149 | button = gtk.CheckButton() |
| 150 | button.set_active(value) |
| 151 | button.connect('toggled', lambda widget, |
| 152 | option=option: self._toggle_cb(widget, option)) |
| 153 | return button |
| 154 | |
| 155 | def _add_integer(self, option, value): |
| 156 | if isinstance(option.constraint, tuple): |
| 157 | return self._add_spinbutton(option, value) |
| 158 | elif isinstance(option.constraint, list): |
| 159 | # TODO |
| 160 | return None |
| 161 | return self._add_spinbutton(option, value) |
| 162 | |
| 163 | def _add_fixed_point(self, option, value): |
| 164 | if isinstance(option.constraint, tuple): |
| 165 | return self._add_spinbutton(option, value) |
| 166 | elif isinstance(option.constraint, list): |
| 167 | # TODO |
| 168 | return None |
| 169 | else: |
| 170 | # TODO |
| 171 | return None |
| 172 | |
| 173 | @trace() |
| 174 | def _add_string(self, option, value): |
| 175 | if option.constraint: |
| 176 | return self._add_combo(option, value) |
| 177 | |
| 178 | return self._add_entry(option, value) |
| 179 | |
| 180 | def _add_action(self, option, value): |
| 181 | # TODO |
| 182 | return None |
| 183 | |
| 184 | def _add_spinbutton(self, option, value): |
| 185 | if isinstance(option.constraint, tuple): |
| 186 | lower, upper, step = option.constraint |
| 187 | else: |
| 188 | lower, upper, step = 0, sys.maxint, 1 |
| 189 | |
| 190 | if not step: |
| 191 | # no quantization set => guess it |
| 192 | step = 1 |
| 193 | |
| 194 | spin_adj = gtk.Adjustment(value, lower, upper, step, step*10, 0) |
| 195 | spin = gtk.SpinButton(spin_adj, 0, 0) |
| 196 | spin.props.snap_to_ticks = True |
| 197 | spin.set_digits(self._calc_digits(step)) |
| 198 | |
| 199 | if isinstance(value, float): |
| 200 | spin.connect('value-changed', lambda widget, option=option: |
| 201 | self._spin_float_changed_cb(widget, option)) |
| 202 | else: |
| 203 | spin.connect('value-changed', lambda widget, option=option: |
| 204 | self._spin_int_changed_cb(widget, option)) |
| 205 | |
| 206 | spin.set_numeric(True) |
| 207 | spin.show() |
| 208 | |
| 209 | return spin |
| 210 | |
| 211 | def _calc_digits(self, step): |
| 212 | digits = 0 |
| 213 | while math.modf(step)[0] > .001: |
| 214 | digits += 1 |
| 215 | step *= 10 |
| 216 | |
| 217 | return digits |
| 218 | |
| 219 | def _add_entry(self, option, value): |
| 220 | # untested |
| 221 | entry = gtk.Entry() |
| 222 | entry.set_text(value) |
| 223 | entry.connect('focus-out-event', lambda widget, option=option: |
| 224 | self._entry_changed_cb(widget, option)) |
| 225 | entry.connect('activated', lambda widget, option=option: |
| 226 | self._entry_changed_cb(widget, option)) |
| 227 | return entry |
| 228 | |
| 229 | @trace() |
| 230 | def _add_combo(self, option, value): |
| 231 | box = ComboBox() |
| 232 | for combo_value in option.constraint: |
| 233 | # FIXME: take translation from SANE |
| 234 | box.append_item(combo_value, _(combo_value)) |
| 235 | |
| 236 | new_idx = option.constraint.index(value) |
| 237 | box.set_active(new_idx) |
| 238 | box.connect('changed', lambda widget, option=option: |
| 239 | self._combo_changed_cb(widget, option)) |
| 240 | return box |
| 241 | |
| 242 | @trace() |
| 243 | def _toggle_cb(self, button, option): |
| 244 | new_value = button.get_active() |
| 245 | setattr(self._scanner, option.py_name, new_value) |
| 246 | |
| 247 | @trace() |
| 248 | def _entry_changed_cb(self, entry, option): |
| 249 | setattr(self._scanner, option.py_name, entry.get_text()) |
| 250 | |
| 251 | @trace() |
| 252 | def _combo_changed_cb(self, combo, option): |
| 253 | setattr(self._scanner, option.py_name, combo.get_value()) |
| 254 | |
| 255 | @trace() |
| 256 | def _spin_float_changed_cb(self, spin, option): |
| 257 | setattr(self._scanner, option.py_name, spin.get_value()) |
| 258 | |
| 259 | @trace() |
| 260 | def _spin_int_changed_cb(self, spin, option): |
| 261 | setattr(self._scanner, option.py_name, int(spin.get_value())) |
| 262 | |
| 263 | |
| 264 | class ScanThread(threading.Thread): |
| 265 | |
| 266 | def __init__(self, devs, temp_dir, callback=None): |
| 267 | threading.Thread.__init__(self) |
| 268 | self._devs = devs |
| 269 | self._temp_dir = temp_dir |
| 270 | self._callback = callback |
| 271 | self._cond = threading.Condition() |
| 272 | self._action = None |
| 273 | self._images = [] |
| 274 | self._error = None |
| 275 | self._ready = False |
| 276 | self._dpi = None |
| 277 | |
| 278 | def run(self): |
| 279 | while True: |
| 280 | with self._cond: |
| 281 | while not self._action: |
| 282 | logging.debug('waiting') |
| 283 | self._cond.wait() |
| 284 | logging.debug('woken') |
| 285 | |
| 286 | action = self._action |
| 287 | self._action = None |
| 288 | |
| 289 | if action == 'quit': |
| 290 | return |
| 291 | |
| 292 | if action == 'start': |
| 293 | self._scan() |
| 294 | |
| 295 | def stop_thread(self): |
| 296 | with self._cond: |
| 297 | self._action = 'quit' |
| 298 | self._cond.notify() |
| 299 | |
| 300 | @trace() |
| 301 | def start_scan(self): |
| 302 | with self._cond: |
| 303 | logging.debug('start_scan(): got lock') |
| 304 | self._action = 'start' |
| 305 | self._cond.notify() |
| 306 | logging.debug('start_scan(): notified') |
| 307 | |
| 308 | logging.debug('start_scan(): lock released') |
| 309 | |
| 310 | @trace() |
| 311 | def stop_scan(self): |
| 312 | with self._cond: |
| 313 | logging.debug('stop_scan(): got lock') |
| 314 | self._action = 'stop' |
| 315 | self._cond.notify() |
| 316 | logging.debug('stop_scan(): notified') |
| 317 | |
| 318 | logging.debug('stop_scan(): lock released') |
| 319 | |
| 320 | def is_ready(self): |
| 321 | with self._cond: |
| 322 | return self._ready |
| 323 | |
| 324 | def get_result(self): |
| 325 | with self._cond: |
| 326 | if self._error: |
| 327 | raise self._error |
| 328 | |
| 329 | images = self._images |
| 330 | self._images = [] |
| 331 | return images |
| 332 | |
| 333 | @trace() |
| 334 | def _scan(self): |
| 335 | self._images = None |
| 336 | self._error = None |
| 337 | |
| 338 | source = getattr(self._devs[0], 'source', 'Auto') |
| 339 | if getattr(self._devs[0], 'batch_scan', False): |
| 340 | scan_multi = source in ['Auto', 'ADF'] |
| 341 | else: |
| 342 | scan_multi = source == 'ADF' |
| 343 | |
| 344 | try: |
| 345 | if scan_multi: |
| 346 | self._scan_multi() |
| 347 | else: |
| 348 | logging.debug('starting single scan') |
| 349 | self._dpi = self._devs[0].resolution |
| 350 | self._images = [self._process_image(self._devs[0].scan())] |
| 351 | |
| 352 | except sane.error, exc: |
| 353 | # Ouch. sane.error doesn't derive from Exception :-/ |
| 354 | self._error = ValueError('SANE error: %s' % (exc, )) |
| 355 | |
| 356 | except Exception, exc: |
| 357 | self._error = exc |
| 358 | |
| 359 | with self._cond: |
| 360 | self._ready = True |
| 361 | |
| 362 | try: |
| 363 | self._callback(self._images, self._error) |
| 364 | |
| 365 | except: |
| 366 | logging.exception('_scan(): Uncaught exception in callback') |
| 367 | |
| 368 | @trace() |
| 369 | def _scan_multi(self): |
| 370 | logging.debug('_scan: calling multi_scan()') |
| 371 | scan_iter = self._devs[0].multi_scan() |
| 372 | |
| 373 | logging.debug('_scan: acquiring images') |
| 374 | images = [] |
| 375 | try: |
| 376 | self._dpi = self._devs[0].resolution |
| 377 | for image in scan_iter: |
| 378 | images.append(self._process_image(image)) |
| 379 | if self._check_action(['stop', 'quit']): |
| 380 | break |
| 381 | |
| 382 | self._dpi = self._devs[0].resolution |
| 383 | |
| 384 | self._images = images |
| 385 | |
| 386 | finally: |
| 387 | logging.debug('_scan(): closing iterator') |
| 388 | # make sure the scan is "cancelled" _now_ |
| 389 | del scan_iter |
| 390 | logging.debug('_scan(): iterator closed') |
| 391 | |
| 392 | @trace() |
| 393 | def _check_action(self, actions): |
| 394 | with self._cond: |
| 395 | return self._action in actions |
| 396 | |
| 397 | def _process_image(self, image): |
| 398 | image_file = tempfile.NamedTemporaryFile(dir=self._temp_dir, |
| 399 | suffix='.png') |
| 400 | image.save(image_file.name) |
| 401 | image_file.flush() |
| 402 | info = { |
| 403 | 'file': image_file, |
| 404 | 'width_pixel': image.size[0], |
| 405 | 'height_pixel': image.size[1], |
| 406 | 'dpi': self._dpi, |
| 407 | } |
| 408 | del image |
| 409 | return info |
| 410 | |
| 411 | |
| 412 | class ScanActivity(activity.Activity): |
| 413 | |
| 414 | _STATUS_MSGS = { |
| 415 | 'no-dev': _('No scanner found'), |
| 416 | 'ready': _('Ready'), |
| 417 | 'stopping': _('Stopping...'), |
| 418 | 'scanning': _('Scanning...'), |
| 419 | 'error': _('Error: %s'), |
| 420 | } |
| 421 | |
| 422 | def __init__(self, handle): |
| 423 | activity.Activity.__init__(self, handle) |
| 424 | self.max_participants = 1 |
| 425 | self._scanner_name = None |
| 426 | self._scanners = [] |
| 427 | self._scanner_options = {'source': 'ADF'} |
| 428 | self._image_infos = [] |
| 429 | self._status = 'init' |
| 430 | self._msg_box_buf = None |
| 431 | self._status_entry = None |
| 432 | self._scan_button = None |
| 433 | self._settings_toolbar = None |
| 434 | temp_dir = os.path.join(self.get_activity_root(), 'tmp') |
| 435 | self._scan_thread = ScanThread(self._scanners, temp_dir, |
| 436 | callback=self._scan_finished_cb) |
| 437 | self._scan_thread.start() |
| 438 | self._setup_widgets() |
| 439 | self._init_scanner() |
| 440 | |
| 441 | @trace() |
| 442 | def destroy(self): |
| 443 | self._scan_thread.stop_thread() |
| 444 | self._scan_thread.join() |
| 445 | logging.debug('ScanThread finished') |
| 446 | [info['file'].close() for info in self._image_infos] |
| 447 | activity.Activity.destroy(self) |
| 448 | |
| 449 | def read_file(self, file_path): |
| 450 | if not self._scanners: |
| 451 | return |
| 452 | |
| 453 | globals_dict = {'__builtins__': None} |
| 454 | settings = eval(file(file_path).read(), globals_dict) |
| 455 | self._set_settings(settings) |
| 456 | # TODO: don't call set_scanner() twice when resuming (once in |
| 457 | # _init_scanner() and once here) |
| 458 | self._settings_toolbar.set_scanner(self._scanners[0]) |
| 459 | |
| 460 | def write_file(self, file_path): |
| 461 | self.metadata['mime_type'] = 'text/plain' |
| 462 | with file(file_path, 'w') as f: |
| 463 | f.write(repr(self._get_settings())) |
| 464 | |
| 465 | @trace() |
| 466 | def _get_settings(self): |
| 467 | if not self._scanners: |
| 468 | return {} |
| 469 | |
| 470 | settings = {} |
| 471 | scanner = self._scanners[0] |
| 472 | for py_name in scanner.optlist: |
| 473 | logging.debug('getting value for setting %r', py_name) |
| 474 | option = scanner[py_name] |
| 475 | if option.type in [sane.TYPE_BOOL, sane.TYPE_INT, |
| 476 | sane.TYPE_FIXED, sane.TYPE_STRING] and option.is_active(): |
| 477 | |
| 478 | settings[py_name] = getattr(scanner, py_name) |
| 479 | |
| 480 | return settings |
| 481 | |
| 482 | @trace() |
| 483 | def _set_settings(self, settings): |
| 484 | if not self._scanners: |
| 485 | return |
| 486 | |
| 487 | scanner = self._scanners[0] |
| 488 | for name, value in settings.items(): |
| 489 | try: |
| 490 | setattr(scanner, name, value) |
| 491 | |
| 492 | except AttributeError: |
| 493 | logging.info('Saved setting %r=%r not support by current' |
| 494 | ' scanner', name, value) |
| 495 | |
| 496 | except sane.error: |
| 497 | logging.exception('Cannot set saved setting %r=%r', name, |
| 498 | value) |
| 499 | |
| 500 | @trace() |
| 501 | def _init_scanner(self): |
| 502 | sane.init() |
| 503 | scanner_devs = sane.get_devices() |
| 504 | if not scanner_devs: |
| 505 | self._set_status('no-dev') |
| 506 | return |
| 507 | |
| 508 | self._scanner_name = scanner_devs[0][0] |
| 509 | self._reopen_scanner() |
| 510 | |
| 511 | def _reopen_scanner(self): |
| 512 | """Reopen scanner device to work around lower layer bugs.""" |
| 513 | if self._scanners: |
| 514 | try: |
| 515 | old_scanner = self._scanners.pop() |
| 516 | old_scanner.close() |
| 517 | del old_scanner |
| 518 | |
| 519 | except sane.error, exc: |
| 520 | logging.exception('Error closing scanner') |
| 521 | |
| 522 | if not self._scanner_name: |
| 523 | self._set_status('no-dev') |
| 524 | return |
| 525 | |
| 526 | try: |
| 527 | self._scanners.append(sane.open(self._scanner_name)) |
| 528 | |
| 529 | except sane.error, exc: |
| 530 | logging.exception('Error opening scanner %r', self._scanner_name) |
| 531 | self._show_error(exc) |
| 532 | return |
| 533 | |
| 534 | self._settings_toolbar.set_scanner(self._scanners[0]) |
| 535 | |
| 536 | self._set_status('ready') |
| 537 | |
| 538 | def _setup_widgets(self): |
| 539 | self._setup_toolbar() |
| 540 | self._setup_canvas() |
| 541 | |
| 542 | def _setup_canvas(self): |
| 543 | vbox = gtk.VBox() |
| 544 | self._status_entry = gtk.Entry() |
| 545 | self._status_entry.set_editable(False) |
| 546 | self._status_entry.set_sensitive(False) |
| 547 | vbox.pack_start(self._status_entry, expand=False) |
| 548 | self._status_entry.show() |
| 549 | |
| 550 | msg_box = gtk.TextView() |
| 551 | msg_box.set_editable(False) |
| 552 | msg_box.set_wrap_mode(gtk.WRAP_WORD) |
| 553 | self._msg_box_buf = msg_box.get_buffer() |
| 554 | vbox.pack_start(msg_box, expand=True, fill=True) |
| 555 | msg_box.show() |
| 556 | self.set_canvas(vbox) |
| 557 | vbox.show() |
| 558 | |
| 559 | def _setup_toolbar(self): |
| 560 | toolbar_box = ToolbarBox() |
| 561 | |
| 562 | activity_button = ActivityToolbarButton(self) |
| 563 | toolbar_box.toolbar.insert(activity_button, -1) |
| 564 | activity_button.show() |
| 565 | |
| 566 | self._scan_button = ToolButton('start-scan1') |
| 567 | self._scan_button.props.tooltip = _('Start scan') |
| 568 | self._scan_button.connect('clicked', self._scan_button_cb) |
| 569 | toolbar_box.toolbar.insert(self._scan_button, -1) |
| 570 | self._scan_button.show() |
| 571 | |
| 572 | self._settings_toolbar = SettingsToolbar() |
| 573 | settings_button = ToolbarButton() |
| 574 | settings_button.props.page = self._settings_toolbar |
| 575 | settings_button.props.icon_name = 'preferences-system' |
| 576 | settings_button.props.label = _('Scanner settings') |
| 577 | toolbar_box.toolbar.insert(settings_button, -1) |
| 578 | settings_button.show() |
| 579 | |
| 580 | self._save_button = ToolButton('document-save') |
| 581 | self._save_button.props.tooltip = _('Save collection as PDF') |
| 582 | self._save_button.set_sensitive(False) |
| 583 | self._save_button.connect('clicked', self._save_button_cb) |
| 584 | toolbar_box.toolbar.insert(self._save_button, -1) |
| 585 | self._save_button.show() |
| 586 | |
| 587 | separator = gtk.SeparatorToolItem() |
| 588 | separator.props.draw = False |
| 589 | separator.set_expand(True) |
| 590 | toolbar_box.toolbar.insert(separator, -1) |
| 591 | separator.show() |
| 592 | |
| 593 | stop_button = StopButton(self) |
| 594 | toolbar_box.toolbar.insert(stop_button, -1) |
| 595 | stop_button.show() |
| 596 | |
| 597 | self.set_toolbar_box(toolbar_box) |
| 598 | toolbar_box.show() |
| 599 | |
| 600 | @trace() |
| 601 | def _scan_button_cb(self, *args): |
| 602 | if self._status == 'ready': |
| 603 | self._add_msg('triggering scan') |
| 604 | self._set_status('scanning') |
| 605 | self._scan_thread.start_scan() |
| 606 | elif self._status == 'scanning': |
| 607 | self._add_msg('stopping scan') |
| 608 | self._set_status('stopping') |
| 609 | self._scan_thread.stop_scan() |
| 610 | else: |
| 611 | logging.warning('_scan_button_cb called with status=%r', |
| 612 | self._status) |
| 613 | |
| 614 | |
| 615 | @trace() |
| 616 | def _scan_finished_cb(self, image_infos, exc): |
| 617 | gobject.idle_add(self._scan_finished_real_cb, image_infos, exc) |
| 618 | |
| 619 | @trace() |
| 620 | def _scan_finished_real_cb(self, image_infos, exc): |
| 621 | if exc: |
| 622 | self._show_error(exc) |
| 623 | |
| 624 | if image_infos: |
| 625 | num_images = len(image_infos) |
| 626 | self._add_msg(ngettext('%d page scanned', '%d pages scanned', |
| 627 | num_images) % (num_images, )) |
| 628 | self._save_button.set_sensitive(True) |
| 629 | |
| 630 | self._image_infos += image_infos |
| 631 | |
| 632 | if not exc: |
| 633 | self._set_status('ready') |
| 634 | else: |
| 635 | self._reopen_scanner() |
| 636 | |
| 637 | @trace() |
| 638 | def _save_button_cb(self, *args): |
| 639 | # TODO: do processing in background (another thread?) |
| 640 | save_dir = os.path.join(self.get_activity_root(), 'instance') |
| 641 | fd, name = tempfile.mkstemp(dir=save_dir) |
| 642 | with os.fdopen(fd, 'w') as f: |
| 643 | self._save_pdf(f) |
| 644 | |
| 645 | jobject = datastore.create() |
| 646 | jobject.metadata['mime_type'] = 'application/pdf' |
| 647 | jobject.metadata['title'] = 'Scanned document' |
| 648 | # TODO: add tags, description etc. |
| 649 | jobject.file_path = name |
| 650 | self._save_button.set_sensitive(False) |
| 651 | datastore.write(jobject, transfer_ownership=True, |
| 652 | reply_handler=self._save_reply_cb, |
| 653 | error_handler=self._save_error_cb) |
| 654 | jobject.destroy() |
| 655 | |
| 656 | @trace() |
| 657 | def _save_pdf(self, f): |
| 658 | max_width_inch = reduce(max, |
| 659 | [info['width_pixel']/info['dpi'] for info in self._image_infos]) |
| 660 | max_height_inch = reduce(max, |
| 661 | [info['height_pixel']/info['dpi'] for info in self._image_infos]) |
| 662 | canvas = reportlab.pdfgen.canvas.Canvas(f, |
| 663 | pagesize=(max_width_inch*units.inch, max_height_inch*units.inch)) |
| 664 | |
| 665 | for info in self._image_infos: |
| 666 | width_inch = float(info['width_pixel'])/info['dpi'] |
| 667 | height_inch = float(info['height_pixel'])/info['dpi'] |
| 668 | canvas.setFillColorRGB(1, 1, 1) |
| 669 | canvas.rect(0, 0, max_width_inch*units.inch, |
| 670 | max_height_inch*units.inch, fill=1) |
| 671 | canvas.drawImage(info['file'].name, 0, 0, width_inch*units.inch, |
| 672 | height_inch*units.inch) |
| 673 | canvas.showPage() |
| 674 | |
| 675 | canvas.save() |
| 676 | |
| 677 | @trace() |
| 678 | def _save_reply_cb(self, *args): |
| 679 | [info['file'].close() for info in self._image_infos] |
| 680 | self._image_infos = [] |
| 681 | |
| 682 | @trace() |
| 683 | def _save_error_cb(self, error): |
| 684 | self._show_error(error) |
| 685 | self._save_button.set_sensitive(True) |
| 686 | |
| 687 | @trace() |
| 688 | def _show_error(self, exc): |
| 689 | self._add_msg(exc) |
| 690 | self._set_status('error', exc) |
| 691 | |
| 692 | @trace() |
| 693 | def _add_msg(self, msg): |
| 694 | logging.info('%s', msg) |
| 695 | self._msg_box_buf.insert(self._msg_box_buf.get_end_iter(), |
| 696 | '%.1f %s\n' % (time.time(), msg)) |
| 697 | |
| 698 | @trace() |
| 699 | def _set_status(self, status, *args): |
| 700 | self._status = status |
| 701 | self._status_entry.set_text(self._STATUS_MSGS[status] % tuple(args)) |
| 702 | |
| 703 | if self._status == 'ready': |
| 704 | self._scan_button.set_icon('start-scan1') |
| 705 | self._scan_button.props.tooltip = _('Start scan') |
| 706 | self._scan_button.set_sensitive(True) |
| 707 | elif self._status == 'scanning': |
| 708 | self._scan_button.set_icon('stop-scan1') |
| 709 | self._scan_button.props.tooltip = _('Stop scan') |
| 710 | self._scan_button.set_sensitive(True) |
| 711 | else: |
| 712 | self._scan_button.set_sensitive(False) |
| 713 | |
| 714 | |
| 715 | def start(): |
| 716 | gtk.gdk.threads_init() |
| 717 | gtk.gdk.threads_enter() |
| 718 | |
| 719 | # FIXME: can't call gtk.gdk.threads_leave() because sugar-activity |
| 720 | # (sugar.activity.main.main()) doesn't provide a hook for that. :( |
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