Thread: [Pycodeocr-main] SF.net SVN: pycodeocr:[66] branches/redesign

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Revision: 66
          http://sourceforge.net/p/pycodeocr/code/66
Author:   laserb
Date:     2014-08-26 13:07:59 +0000 (Tue, 26 Aug 2014)
Log Message:
-----------
Get some basic GUI to work.

Modified Paths:
--------------
    branches/redesign/PyCodeOCR.py
    branches/redesign/Recognition/ESR.py
    branches/redesign/Recognition/ImageRecognition.py
    branches/redesign/gtkGUI/ImagePreview.py
    branches/redesign/gtkGUI/ProgressBar.py
    branches/redesign/gtkGUI/__init__.py

Removed Paths:
-------------
    branches/redesign/blacklist
    branches/redesign/tests/
    branches/redesign/utils/checksum.py
    branches/redesign/utils/ocr.py

Modified: branches/redesign/PyCodeOCR.py
===================================================================

--- branches/redesign/PyCodeOCR.py	2014-08-24 10:19:30 UTC (rev 65)
+++ branches/redesign/PyCodeOCR.py	2014-08-26 13:07:59 UTC (rev 66)
@@ -43,27 +43,80 @@
 # @include "./CHANGES"
 #
 
+import gtk, time
 import Source
 import Recognition
+import gtkGUI
+import threading
 
 class PyCodeOCR(object):
     def __init__(self):
-        self.sources = Source.Sources()
-        self.sources.searchScanner()
+        
+        srcs = Source.Sources()
+        srcs.searchScanner()
+        self.source = srcs.getSources()[0]
+        
+        self.win = gtk.Window()
+        self.win.set_border_width(5)
+        self.win.set_title('PyCodeOCR')
+        self.win.connect('delete-event', gtk.main_quit)
+        
 
+        hbox = gtk.HBox()
+        self.win.add(hbox)
+         
+        vboxImage = gtk.VBox()
+        self.imagePreview = gtkGUI.ImagePreview()
+        self.progressbar = gtkGUI.ProgressBar(4)
+        vboxImage.pack_start(self.imagePreview,True,True,0)
+        vboxImage.pack_end(self.progressbar,False,False,0)
+        
+        hbox.add(vboxImage)
+        
+        vboxProperties = gtk.VBox()
+        hbox.add(vboxProperties)
+        
+        button = gtk.Button("Scan")
+        button.connect("pressed",self.on_button_pressed)
+        vboxProperties.pack_end(button, False, False, 0)
+    
+        self.win.show_all()
+
     def __call__(self):
-        self.runRecognition()
+        gtk.main()
+
     
-    def runRecognition(self):
-        source = self.sources.getSources()[0]
-        imageRecognition = Recognition.ESR()
-        imageRecognition.setRotate([180])
+    ## Refresh window during running processes.
+    def refresh(self):
+        self.win.queue_draw()
+        time.sleep(0.1)            # give also some time to the user... :)
+        while gtk.events_pending():
+            gtk.main_iteration()
+    
+    
+    def on_button_pressed(self, event):
+        self.imageRecognition = Recognition.ESR()
+        self.imageRecognition.setRotate([180])
+        
         stdScannerData = Source.StdScannerData()
         scannerData = stdScannerData.getStdScannerData("180 deg")
-        runRecognition = Recognition.RunRecognition(source, scannerData, imageRecognition)
-        (check, msg) = runRecognition()
-        print msg
-
+        
+        runRecognition = Recognition.RunRecognition(self.source, scannerData, self.imageRecognition)
+        runRecognition.connect("updateRecognition", self.onProgressUpdate)
+        runRecognition.connect("recognized", self.on_recognized)
+        t = threading.Thread(target=runRecognition)
+        t.start()
+        #gtk.threads_enter()
+        #self.imagePreview.setRecognitionData(esr.getRecognitionData())
+        #gtk.threads_leave()
+    
+    def on_recognized(self, runRecognition):
+        self.imagePreview.setRecognitionData(self.imageRecognition.getRecognitionData())
+    
+    def onProgressUpdate(self, runRecognition, message):
+        self.progressbar.nextProgress(message)
+        
 if __name__ == '__main__':
+    gtk.threads_init()
     main = PyCodeOCR()
     main()

Modified: branches/redesign/Recognition/ESR.py
===================================================================
--- branches/redesign/Recognition/ESR.py	2014-08-24 10:19:30 UTC (rev 65)
+++ branches/redesign/Recognition/ESR.py	2014-08-26 13:07:59 UTC (rev 66)
@@ -32,7 +32,7 @@
         self.valid_code_len = [ 53, 43, 42, 32 ]                             # valid code lenghts
 
     ## @overwrite verification
-    def verify(self):
+    def doVerification(self):
         # correct for common char recognition errors
         self.recognitionData.setContent(self.char_correction(self.recognitionData.getContent()))
         
@@ -69,6 +69,11 @@
     # @see http://www.bundesbank.de/zahlungsverkehr/zahlungsverkehr_pruefziffernberechnung.php
     # @return True if checksum is valid, false otherwise
     def checksum(self, number):
+        try:
+            int(number)
+        except:
+            return False
+        
         tabelle = [0,9,4,6,8,2,7,1,3,5]
         uebertrag = 0
         

Modified: branches/redesign/Recognition/ImageRecognition.py
===================================================================
--- branches/redesign/Recognition/ImageRecognition.py	2014-08-24 10:19:30 UTC (rev 65)
+++ branches/redesign/Recognition/ImageRecognition.py	2014-08-26 13:07:59 UTC (rev 66)
@@ -19,7 +19,8 @@
 # @li Modules: utils
 #
 
-import os, gtk
+import os, gtk, threading, gobject
+import pyperclip
 from PIL import Image
 import utils
 
@@ -31,6 +32,7 @@
         self.name = name
         self.depth = 8
         self.rotate = [0,90,90,90]
+        self.recognitionData = None
     
     ## Verify if data is valid.
     # @pre image acquired and recognized
@@ -38,7 +40,9 @@
     # @return (boolean, data) True if data is valid, false otherwise
     # if data is valid return data, otherwise return error message 
     def verify(self):
-        return (True, "")
+        (check, msg) = self.doVerification()
+        self.recognitionData.setValid(check)
+        return (True, msg)
     
     ## get image and associated data
     # @pre image recognized
@@ -89,6 +93,7 @@
         self.image = image
         self.temp_name = "image_object_temp_file"
         self.content = ""
+        self.valid = None
     
     ## get image
     # @return image
@@ -118,29 +123,35 @@
     # @pre image recognized
     # @param information from image
     # @post information set
-    def setContent(self, content):
+    def setContent(self, content, valid = None):
         self.content = content
+        self.valid = valid
     
     ## get information associated with image
     # @return information content
     def getContent(self):
         return self.content
     
+    def setValid(self, valid):
+        self.valid = valid
+    
+    def isValid(self):
+        return self.valid
+    
     ## save content to clipboard
     # @pre information set
     # @post information saved in clipboard
     def saveClipboard(self): 
-        # get the clipboard
-        clipboard = gtk.clipboard_get()
         # set the clipboard text data
-        clipboard.set_text(self.content)
+        pyperclip.setcb(self.content)
         # make our data available to other applications
-        clipboard.store()
+        pyperclip.getcb()
 
 ## Run the recognition and verify the information
-class RunRecognition(object):
+class RunRecognition(gobject.GObject):
     ## init
     def __init__(self, source, data, imageRecognition):
+        self.__gobject_init__()
         self.source = source
         self.data = data
         self.imageRecognition = imageRecognition
@@ -149,6 +160,7 @@
     # @return (boolean, data), True if data is valid, False otherwise
     # data if the acquired data is image, error-message otherwise
     def __call__(self):
+        self.emit("updateRecognition","Get Image ...")
         image = self.source.getImage(self.data)
         return self.recognize(image)
     
@@ -157,15 +169,24 @@
     # data if the acquired data is image, error message otherwise
     def recognize(self, image):
         # do recognition
+        self.emit("updateRecognition","Recognize image ...")
         self.imageRecognition.recognizeImage(image)
         
         # verify data
+        self.emit("updateRecognition","Verify data ...")
         (check, msg) = self.imageRecognition.verify()
         
         # if data is valid, save to clipboard and return data
+        self.emit("recognized")
         if check:
+            self.emit("updateRecognition","Data is valid. Save to clipboard.")
             self.imageRecognition.getRecognitionData().saveClipboard()
             return (True, self.imageRecognition.getRecognitionData().getContent())
         
         # if data is invalid return error message
-        return (False, msg)
\ No newline at end of file
+        self.emit("updateRecognition","Data is not valid.")
+        return (False, msg)
+    
+gobject.type_register(RunRecognition)
+gobject.signal_new("recognized", RunRecognition, gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ())
+gobject.signal_new("updateRecognition", RunRecognition, gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, (gobject.TYPE_STRING,))

Deleted: branches/redesign/blacklist
===================================================================
--- branches/redesign/blacklist	2014-08-24 10:19:30 UTC (rev 65)
+++ branches/redesign/blacklist	2014-08-26 13:07:59 UTC (rev 66)
@@ -1 +0,0 @@
-Printer Name

Modified: branches/redesign/gtkGUI/ImagePreview.py
===================================================================
--- branches/redesign/gtkGUI/ImagePreview.py	2014-08-24 10:19:30 UTC (rev 65)
+++ branches/redesign/gtkGUI/ImagePreview.py	2014-08-26 13:07:59 UTC (rev 66)
@@ -3,20 +3,29 @@
 
 # PIL/Pillow image library and it's SANE bindings
 from PIL import Image
+import Recognition
 
-class ImagePreview(gtk.Widget):
+class ImagePreview(gtk.VBox):
     def __init__(self):
-        #Initialize the Widget
-        gtk.Widget.__init__(self)
+        #Initialize the VBox
+        gtk.VBox.__init__(self,False,0)
+        self.res_color      = { True:  gtk.gdk.color_parse("#00FF00"),
+               False: gtk.gdk.color_parse("#FF0000"),
+               None:  gtk.gdk.color_parse("#FFFFFF"), }
+        
 #        # retrieve widgets
 #        # main_window - main window
 #        ## gladefile raw_path.glade
-        self.gladefile = raw_path + ".glade"
+        self.gladefile = "/home/rf/Testing/pycodeocr/gtkGUI/ImagePreview.glade"
         # open GTKBuilder
         self.builder   = gtk.Builder()
         self.builder.add_from_file(self.gladefile)
         # connect signal handlers
         self.builder.connect_signals(self)
+        
+        ## label
+        self.scanned_code_label = self.builder.get_object('scanned_code_label')
+        
         ## event box for image
         self.main_image_eventbox   = self.builder.get_object('main_image_eventbox')
         ## event box for image window
@@ -27,26 +36,37 @@
         self.popup_image           = self.builder.get_object('popup_image')
         ## image window
         self.img_popup             = self.builder.get_object('img_popup')
+        
+        ## output line
+        self.output        = self.builder.get_object('output')
+        
         # connect eventbox to close image window
         (self.new_width, self.new_height ) = (0,0)
-        self.main_image.set_tooltip_text("Click for bigger image")
-        self.popup_image.set_tooltip_text("Leave window to close")
+        self.main_image.set_tooltip_text("Click for original image")
+        #self.main_image.connect('expose-event', self.on_image_resize, "") # high cpu usage
+        self.popup_image.set_tooltip_text("Click to close")
         
-
+        self.pack_start(self.scanned_code_label,False,False,0)
+        self.pack_start(self.main_image_eventbox,True,True,0)
+        self.pack_end(self.output,False,False,0)
         
-    def on_eventbox_button_press_event(self, source=None, event=None):
+        self.show_all()
+        
+    def on_popup_image_eventbox_button_press_event(self, source=None, event=None):
         if self.img_popup.get_visible():
             # hide window
             self.img_popup.hide()
+
+    def on_main_image_eventbox_button_press_event(self, source=None, event=None):
+        if self.img_popup.get_visible():
+            # hide window
+            self.img_popup.hide()
         else:
-            pixbuf = self.image_to_pixbuf(self.image.getImage())
+            image = self.recognitionData.getImage()
+            pixbuf = self.image_to_pixbuf(image)
             image = gtk.Image()
             image.set_from_pixbuf(pixbuf)
-            
-            scaled_pixbuf = pixbuf.scale_simple(300,300,gtk.gdk.INTERP_BILINEAR)
-
-            # set image
-            self.popup_image.set_from_pixbuf( scaled_pixbuf )
+            self.popup_image.set_from_pixbuf( pixbuf )
             # show window
             self.img_popup.show()
             
@@ -57,25 +77,73 @@
     # @see http://www.daniweb.com/code/snippet216637.html
     # @see http://www.pythonware.com/products/pil/index.htm
     def setImage(self, image): 
-        self.image = image
-        pixbuf = self.image_to_pixbuf(self.image.getImage())
+        self.recognitionData = Recognition.RecognitionData(image)
+        self.setImageHelper()
+
+    
+    def setImageHelper(self):
+        image = self.recognitionData.getImage()
+        pixbuf = self.image_to_pixbuf(image)
         image = gtk.Image()
         image.set_from_pixbuf(pixbuf)
+
+        self.main_image.set_from_pixbuf( pixbuf )
+        self.on_image_resize(self.main_image, "", "")
         
-        scaled_pixbuf = pixbuf.scale_simple(150,150,gtk.gdk.INTERP_BILINEAR)
+    def setOutput(self, output, mode = None):
+        self.recognitionData.setContent(output, mode)
+        self.setOutputHelper()
+    
+    def setOutputHelper(self):
+        self.output.set_text(self.recognitionData.getContent())
+        mode = self.recognitionData.isValid()
+        
+        # widget color
+        self.output.modify_base(gtk.STATE_NORMAL, self.res_color[mode])
 
-
-        self.main_image.set_from_pixbuf( scaled_pixbuf )
+    def setRecognitionData(self, recognitionData):
+        self.recognitionData = recognitionData
+        self.setImageHelper()
+        self.setOutputHelper()
     
-    
-    def image_to_pixbuf(self):
+    # @see http://stackoverflow.com/questions/7906814/converting-pil-image-to-gtk-pixbuf
+    def image_to_pixbuf(self, image):
         fd = StringIO.StringIO()
-        self.image.getImage().save(fd, "ppm")
+        self.recognitionData.getImage().save(fd, "png")
         contents = fd.getvalue()
         fd.close()
-        loader = gtk.gdk.PixbufLoader("pnm")
+        loader = gtk.gdk.PixbufLoader("png")
         loader.write(contents, len(contents))
         pixbuf = loader.get_pixbuf()
         loader.close()
         return pixbuf
+    
+    def on_image_resize(self, widget, event, window):
+        allocation = widget.get_allocation()
+        image = self.recognitionData.getImage()
+        pixbuf = self.image_to_pixbuf(image)
+        image = gtk.Image()
+        image.set_from_pixbuf(pixbuf)
+        
+        width = pixbuf.get_width()
+        height = pixbuf.get_height()
+        if height != allocation.height or width != allocation.width:
+            # min width and height should be 10px
+            target_width = max(100,allocation.width)
+            target_height = max(100,allocation.height)
+            
+            # get current width and height
+            width, height = pixbuf.get_width(), pixbuf.get_height()
+            
+            # get scale for width and height
+            scale_width, scale_height = float(target_width)/width, float(target_height)/height
+            
+            # target scale is minimum scale for width and height
+            scale = min(scale_width,scale_height)
+            
+            # scale pixbuf
+            pixbuf = pixbuf.scale_simple(int(width*scale), int(height*scale), gtk.gdk.INTERP_BILINEAR)
+
+            # set new pixbuf
+            widget.set_from_pixbuf(pixbuf)
     
\ No newline at end of file

Modified: branches/redesign/gtkGUI/ProgressBar.py
===================================================================
--- branches/redesign/gtkGUI/ProgressBar.py	2014-08-24 10:19:30 UTC (rev 65)
+++ branches/redesign/gtkGUI/ProgressBar.py	2014-08-26 13:07:59 UTC (rev 66)
@@ -1,24 +1,23 @@
 import gtk
 
-class ProgressBar(gtk.Widget):
+# @see http://bytes.com/topic/python/answers/579827-pygtk-custom-widgets
+class ProgressBar(gtk.HBox):
     def __init__(self,maximum):
-        gtk.Widget.__init(self)
-#        # retrieve widgets
-#        # main_window - main window
-#        ## gladefile raw_path.glade
-        self.gladefile = raw_path + ".glade"
-        # open GTKBuilder
-        self.builder   = gtk.Builder()
-        self.builder.add_from_file(self.gladefile)
-        # connect signal handlers
-        self.builder.connect_signals(self)
-        ## progressbar
-        self.progressbar           = self.builder.get_object('progressbar')
-        self.progress = 0
-        self.maximum = maximum
+        gtk.HBox.__init__(self,False,0)
+        self.maximum = 1.0*maximum
+        
+        self.set_border_width(2)
+        
+        # progressbar
+        self.progressbar = gtk.ProgressBar()
+        self.progress = 0.0
+        self.pack_start(self.progressbar,True,True,0)
+        
+        self.show_all()
     
     def nextProgress(self, message):
-        self.progress += 1
+        if self.progress < self.maximum:
+            self.progress += 1
         self.setProgress(message)
     
     def resetProgress(self, message):
@@ -28,10 +27,10 @@
     def setProgress(self, message):
         self.progressbar.set_fraction(self.progress/self.maximum)
         self.progressbar.set_text(message)
-        self.refresh()
+#        self.refresh()
     
     def setMaximum(self, maximum):
-        self.maximum = maximum
+        self.maximum = 1.0*maximum
         self.progressbar.set_fraction(self.progress/self.maximum)
     
     def getMaximum(self):

Modified: branches/redesign/gtkGUI/__init__.py
===================================================================
--- branches/redesign/gtkGUI/__init__.py	2014-08-24 10:19:30 UTC (rev 65)
+++ branches/redesign/gtkGUI/__init__.py	2014-08-26 13:07:59 UTC (rev 66)
@@ -1,3 +1,3 @@
-import ImagePreview
-import ProgressBar
+from ImagePreview import ImagePreview
+from ProgressBar import ProgressBar
 import ScanProperties
\ No newline at end of file

Deleted: branches/redesign/utils/checksum.py
===================================================================
--- branches/redesign/utils/checksum.py	2014-08-24 10:19:30 UTC (rev 65)
+++ branches/redesign/utils/checksum.py	2014-08-26 13:07:59 UTC (rev 66)
@@ -1,47 +0,0 @@
-##
-# @file      utils/checksum.py
-# @namespace utils::checksum
-# @authors   laserb, drtrigon
-# @version   1.1
-# @brief     Modulo 10 checksum for e-banking codes.
-#
-# @test Add unittest to check correct operation of this important module.
-#
-# $Id$
-#
-# @section Description
-#
-# Modulo 10 checksum for e-banking codes
-#
-
-class modulo10:
-    # thanks to http://www.hosang.ch/modulo10.aspx
-    # much more details http://www.sic.ch/de/dl_tkicch_dta.pdf ( page 51 )
-    # @see http://www.bundesbank.de/download/zahlungsverkehr/zv_pz201012.pdf
-    # @see http://www.bundesbank.de/zahlungsverkehr/zahlungsverkehr_pruefziffernberechnung.php
-    def __init__(self, amount, account, reference):
-        self.tabelle = [0,9,4,6,8,2,7,1,3,5]
-
-        self.account    = account
-        self.reference  = reference
-    
-        self.checksum_b = self._checksum(amount)
-        self.checksum_k = self._checksum(account)
-        self.checksum_r = self._checksum(reference)
-        self.checksum   = self.checksum_b and self.checksum_k and self.checksum_r
-
-        try:
-            self.amount = str(int(amount[2:-1])/100.)
-        except ValueError:
-            self.amount = amount + " [ERROR!]"
-
-    def _run(self, nr):
-        self.uebertrag = 0
-        # iterate over each character
-        for i in range(len(nr)):
-            self.uebertrag = self.tabelle[(self.uebertrag + int(nr[i]) )%10]
-        
-        return (10-self.uebertrag)%10
-    
-    def _checksum(self, value):
-        return (int(value[-1]) == self._run(value[:-1]) )

Deleted: branches/redesign/utils/ocr.py
===================================================================
--- branches/redesign/utils/ocr.py	2014-08-24 10:19:30 UTC (rev 65)
+++ branches/redesign/utils/ocr.py	2014-08-26 13:07:59 UTC (rev 66)
@@ -1,272 +0,0 @@
-# -*- coding: utf-8 -*-
-##
-# @file      utils/ocr.py
-# @namespace utils::ocr
-# @authors   laserb, drtrigon
-# @version   1.1
-# @brief     Character recogition (OCR) functions and classes.
-#
-# $Id$
-#
-# @section Description
-#
-# Character recogition (OCR) functions.
-#
-
-# python standard modules
-import os, re, sys, subprocess, gobject, threading, gtk
-from logging import logging
-
-# PIL image library and it's SANE bindings
-import sane    # f12: 'python-imaging-sane'
-
-
-## Character correction after recogition (on basis that there should be numbers and few special chars).
-#
-# @test Add unittest to check correct operation of this important module/function.
-#
-def char_correction(data):
-    data = re.sub("\n", "", data)
-    print data
-    corrections = [
-    # Zero
-    ("O", "0"), ("D", "0"), ("U", "0"), ("Q", "0"), ("\(\)", "0"), ("G", "0"), ("o", "0"),
-    # Two
-    ("Z", "2"),
-    # Three
-    ("\?>", "3"),
-    # Four
-    ("l\.", "4"), ("A", "4"), ("l»", "4"), ("h", "4"), ("i»", "4"), ("l\xe2\x80\xa2", "4"), ("&", "4"), ("l\+", "4"),
-    # Five
-    ("S", "5"),
-    # Six
-    ("c>", "6"),
-    # Seven
-    #("\?", "7"),
-    # One (critical, therefore done as last; has also Overlapps e.g. with Four)
-    (chr(226)+chr(128)+chr(153)+"I", "1"), 
-    (chr(226)+chr(128)+chr(153)+"\|", "1"),
-    (chr(226)+chr(128)+chr(152)+"\|", "1"),
-    (chr(226)+chr(128)+chr(152)+"I", "1"),
-    (chr(39)+"I", "1"),
-    ("I", "1"),
-    (chr(153)+"l", "1"),
-    (chr(39)+"l", "1"),
-    ("l", "1"),
-    (chr(39)+"!", "1"),
-    (chr(39)+"\|", "1"),
-    ("'\|", "1"),
-    ("\|", "1"),
-    ("'\]", "1"),
-    ("'\}", "1"),
-    (r'\\', "1"),
-    # non-numbers
-    (" ", ""),
-    ("\xe2", ""),
-    ("\x80", ""),
-    ("\xbb", ""),
-    ("\x99", ""),
-    ("\x98", ""),
-    ("\x5f", ""),
-    ("\x60", ""),
-    ("'", ""),
-    #('\xbb', 187)('\x99', 153)('\x98', 152)
-    ("\+", "+ "), 
-    ("\)", ">"),
-    ("\x92", "1"),    # post correction
-    ]
-    for item in corrections:
-        olddata = data
-        data = re.sub(item[0], item[1], data)
-        if not (data == olddata): print 'subst: "%s" => "%s"' % (item[0], item[1])
-
-    return data
-
-## SANE/PIL interface python wrapper/bindings.
-class RunSANE(threading.Thread):
-    #                "scanimage --format=tif --resolution 300 --mode Gray > %s.tif"
-    #                "scanimage --format=tif --resolution 600 --mode Gray  -t 82 -y 20 -l 60 -x 155.9 > %s.tif"
-    #cmd_scan       = "scanimage --format=tif --resolution 600 --mode Gray  -t %d -l %d -y %d -x %d > %s.tif"
-
-    resolution = 600
-
-    ## Init of sane interface -> device. 
-    def __init__(self, notebook, progress, device_chooser_button, BlacklistMgr,device_chooser_event,device_info_text):
-        print "init sane python interface ..."
-        self.device_chooser_event = device_chooser_event
-        self.notebook = notebook
-        self.progress = progress
-        self.device_chooser_button = device_chooser_button
-        self.BlacklistMgr = BlacklistMgr
-        self.device_info_text = device_info_text
-        
-        threading.Thread.__init__(self)
-        
-    def run(self):
-        
-        # get blacklist
-        self.blacklist = self.BlacklistMgr.read_blacklist()
-
-        # init SANE
-        self.n = 4.
-        self.progress(0.,"init sane python interface ...")
-        try:
-            self.version = sane.init()
-            self.progress(1./self.n,"init sane python interface ... search devices")
-            # get sane devices
-            self.devices = sane.get_devices()
-
-            # filter blacklisted devices
-            if len(self.devices) > 0 :
-                self.devices = self.BlacklistMgr.filter_devices(self.devices)
-            
-            # check how many devices we found
-            if len(self.devices) == 0:
-                self.progress(0./self.n,"No device found.")
-                self.device_chooser_button.set_visible(False)
-                self.found_scanner = False
-                gtk.gdk.threads_leave()
-                return
-            elif len(self.devices) > 1:
-                # simply continue and select device in GUI ( see init_sane )
-                self.progress(2./self.n,"More than one device found.")
-                self.device_chooser_button.set_visible(True)
-                self.notebook.set_show_tabs(False)
-                self.found_scanner = None
-                self.BlacklistMgr.device_treeview.set_cursor(0)
-                
-                # show tab with device list
-                # choose device and press ok to initialize scanner
-                self.notebook.set_current_page(2)
-                
-                
-                gtk.gdk.threads_leave()
-                self.device_chooser_event.wait()
-                
-                # show main tab again
-                self.notebook.set_show_tabs(True)
-                self.notebook.set_current_page(0)
-                
-                # get selection from treeview
-                self.devnr = self.BlacklistMgr.device_treeview.get_cursor()[0][0]
-                
-            else:
-                # only one device found, continue
-                self.progress(2./self.n,"Device: %s" % self.devices[0][1]+" "+self.devices[0][2])
-                self.device_chooser_button.set_visible(False)
-                self.devnr = 0
-        
-        except:
-            # No device found at all
-            self.found_scanner = False
-            self.device_chooser_button.set_visible(False)
-            print "No sane device found. Retry again."
-            self.progress(0./self.n,"No sane device found. Retry again.")
-            gtk.gdk.threads_leave()
-            return
-            
-
-        ## Init of sane interface -> scanner
-        print "Use device number: "+str(self.devnr)
-        try:    
-            # finish init device
-            self.dev = self.devices[self.devnr][0]    # choose device
-            print "%s" % self.dev
-            self.progress(3./self.n,"Device initialized. Open scanner...")
-    
-            # open scanner device
-            self.scanner = sane.open(self.dev)
-            self.params  = self.scanner.get_parameters()
-            self.opts    = self.scanner.get_options()
-        
-            self.found_scanner = True
-            
-            self.progress(4./self.n,"Ready: %s" % self.devices[self.devnr][1]+" "+self.devices[self.devnr][2])
-#            self.info()
-            self.device_chooser_button.set_visible(False)
-            print "done."
-    
-        except:
-            # init scanner failed. maybe device has no scanner
-            self.found_scanner = False
-            print "Loading sane device failed. Retry again."
-            self.progress(0./self.n,"Loading sane device failed. Retry again.")
-            gtk.gdk.threads_leave()
-            
-            
-        self.info()
-        gtk.gdk.threads_leave()
-        
-
-    ## Not init of sane and scanner, but of scan operation.
-    def post_init(self, coords, out_filename):
-        self.coords       = coords
-        self.out_filename = out_filename
-        #self.info()
-
-    ## call
-    def __call__(self):
-        (self.error, self.stdout, self.stderr) = self._run()
-        return self.error
-
-    ## Scan and save the PIL image object to file.
-    # @see http://mail.python.org/pipermail/image-sig/1997-June/000307.html
-    # @see http://sane-pygtk.sourceforge.net/)
-    def _run(self):
-        try:
-            # Set scan parameters (also with higher resolution!)
-            (t, l, y, x) = self.coords
-            self.scanner.tl_y = float(t)
-            self.scanner.tl_x = float(l)
-            self.scanner.br_y = (float(y) + self.scanner.tl_y)
-            self.scanner.br_x = (float(x) + self.scanner.tl_x)
-            self.scanner.resolution = self.resolution
-            self.scanner.mode       = "Gray"
-
-            # Initiate the scan
-            self.scanner.start()
-
-            # Get an Image object containing the scanned image
-            im = self.scanner.snap()
-            
-            # Write the image out as a TIFF file (or whatever)
-            im.save(self.out_filename)
-
-            #self.scanner.stop()
-        except:
-            return (True, "error", sys.exc_info()[1])
-
-        return (False, "ok", "")
-
-    ## Show some info about the scanner and SANE.
-    def info(self):
-        entrybuffer = self.device_info_text.get_buffer()
-        entrybuffer.delete(entrybuffer.get_start_iter(),entrybuffer.get_end_iter())
-        # redirect print to device textbuffer
-        logdev = logging(entrybuffer)
-        sys.stdout = logdev
-        
-        print 'SANE version: %s' % repr(self.version).replace('array',' ')
-        print "\n"
-        print 'Available devices:'
-        for device in self.devices:
-            print device[1]+" "+device[2]
-        print "\n"
-        print 'Selected device: '+self.devices[self.devnr][1]+" "+self.devices[self.devnr][2]
-        print "\n"
-        print 'SaneDev object= %s' % self.scanner
-        print "\n"
-        print 'Device parameters: %s' % repr(self.params).replace('array',' ')
-        print "\n"
-        print 'Device options:'
-        for opt in self.opts:
-            print "%s: %s" % (opt[2], opt[3])
-        
-        
-    def retry(self):
-        try:
-            self.scanner.close()
-        except:
-            pass
-        sane.exit()
-        self.run()

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