Web   ·   Wiki   ·   Activities   ·   Blog   ·   Lists   ·   Chat   ·   Meeting   ·   Bugs   ·   Git   ·   Translate   ·   Archive   ·   People   ·   Donate
summaryrefslogtreecommitdiffstats
path: root/activity.py
blob: f2896f2a5ca0260253f6300944442b9ed01586a9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
#!/usr/bin/env python
# -*- coding: utf-8 -*-

# activity.py by:
#    Agustin Zubiaga <aguz@sugarlabs.org>
#    Gonzalo Odiard <godiard@gmail.com>
#    Manuel QuiƱones <manuq@laptop.org>

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

import gtk
import gobject
import pango
import os
import simplejson
import locale
import logging
import telepathy
import utils

from gettext import gettext as _

from dbus.service import signal
from dbus.gobject_service import ExportedGObject
from StringIO import StringIO

from sugar.presence import presenceservice
from sugar.presence.tubeconn import TubeConnection
from sugar.activity import activity
from sugar.activity.widgets import ActivityToolbarButton
from sugar.activity.widgets import StopButton
from sugar.activity.widgets import ToolbarButton
from sugar.graphics.toolbarbox import ToolbarBox
from sugar.graphics.toolbutton import ToolButton
from sugar.graphics.radiotoolbutton import RadioToolButton
from sugar.graphics.colorbutton import ColorToolButton
from sugar.graphics.objectchooser import ObjectChooser
from sugar.graphics.icon import Icon
from sugar.graphics.alert import Alert
from sugar.datastore import datastore

from charts import Chart
from readers import StopWatchReader
from readers import MeasureReader

# Mime types
STOPWATCH_MIME_TYPE = "application/x-stopwatch-activity"
CSV_MIME_TYPE = "text/csv"

# GUI Colors
COLOR1 = gtk.gdk.Color(utils.get_user_color()[0])
COLOR2 = gtk.gdk.Color(utils.get_user_color()[1])
WHITE = gtk.gdk.color_parse("white")

# Paths
ACTIVITY_DIR = os.path.join(activity.get_activity_root(), "data/")
CHART_FILE = utils.get_chart_file(ACTIVITY_DIR)

# Logging
_logger = logging.getLogger('simplegraph-activity')
_logger.setLevel(logging.DEBUG)
logging.basicConfig()

# Tube
SERVICE = 'org.sugarlabs.SimpleGraph'
IFACE = SERVICE
PATH = '/org/sugarlabs/SimpleGraph'


class ChartArea(gtk.DrawingArea):

    def __init__(self, parent):
        """A class for Draw the chart"""
        super(ChartArea, self).__init__()
        self._parent = parent
        self.add_events(gtk.gdk.EXPOSURE_MASK | gtk.gdk.VISIBILITY_NOTIFY_MASK)
        self.connect("expose-event", self._expose_cb)

    def _expose_cb(self, widget, event):
        context = self.window.cairo_create()

        x, y, w, h = self.get_allocation()

        # White Background:
        context.rectangle(0, 0, w, h)
        context.set_source_rgb(255, 255, 255)
        context.fill()

        # Paint the chart:
        cw = self._parent.current_chart.width
        ch = self._parent.current_chart.height

        x, y, w, h = self.get_allocation()

        cx = x + w / 2 - cw / 2
        cy = y + h / 2 - ch / 2

        context.set_source_surface(self._parent.current_chart.surface, cx, cy)
        context.paint()


class SimpleGraph(activity.Activity):

    def __init__(self, handle):

        activity.Activity.__init__(self, handle, True)

        #self.max_participants = 1

        # CHART_OPTIONS

        self.x_label = ""
        self.y_label = ""
        self.chart_color = utils.get_user_color()[0]
        self.chart_line_color = utils.get_user_color()[1]
        self.current_chart = None
        self.charts_area = None
        self.chart_data = []

        # TOOLBARS
        toolbarbox = ToolbarBox()

        activity_button = ActivityToolbarButton(self)
        activity_btn_toolbar = activity_button.page

        save_as_image = ToolButton("save-as-image")
        save_as_image.connect("clicked", self._save_as_image)
        save_as_image.set_tooltip(_("Save as image"))
        activity_btn_toolbar.insert(save_as_image, -1)

        save_as_image.show()

        import_stopwatch = ToolButton("import-stopwatch")
        import_stopwatch.connect("clicked", self.__import_stopwatch_cb)
        activity_btn_toolbar.insert(import_stopwatch, -1)

        import_stopwatch.show()

        import_measure = ToolButton("import-measure")
        import_measure.connect("clicked", self.__import_measure_cb)
        activity_btn_toolbar.insert(import_measure, -1)

        import_measure.show()

        activity_btn_toolbar.keep.hide()

        toolbarbox.toolbar.insert(activity_button, 0)

        separator = gtk.SeparatorToolItem()
        separator.set_draw(False)
        separator.set_expand(False)
        toolbarbox.toolbar.insert(separator, -1)

        add_v = ToolButton("row-insert")
        add_v.connect("clicked", self._add_value)
        add_v.set_tooltip(_("Add a value"))

        toolbarbox.toolbar.insert(add_v, -1)

        remove_v = ToolButton("row-remove")
        remove_v.connect("clicked", self._remove_value)
        remove_v.set_tooltip(_("Remove the selected value"))

        toolbarbox.toolbar.insert(remove_v, -1)

        separator = gtk.SeparatorToolItem()
        separator.set_draw(True)
        separator.set_expand(False)
        toolbarbox.toolbar.insert(separator, -1)

        add_vbar_chart = RadioToolButton()
        add_vbar_chart.connect("clicked", self._add_chart_cb, "vbar")
        add_vbar_chart.set_tooltip(_("Vertical Bar Chart"))
        add_vbar_chart.props.icon_name = "vbar"
        charts_group = add_vbar_chart

        toolbarbox.toolbar.insert(add_vbar_chart, -1)

        add_hbar_chart = RadioToolButton()
        add_hbar_chart.connect("clicked", self._add_chart_cb, "hbar")
        add_hbar_chart.set_tooltip(_("Horizontal Bar Chart"))
        add_hbar_chart.props.icon_name = "hbar"
        add_hbar_chart.props.group = charts_group
        toolbarbox.toolbar.insert(add_hbar_chart, -1)

        add_line_chart = RadioToolButton()
        add_line_chart.connect("clicked", self._add_chart_cb, "line")
        add_line_chart.set_tooltip(_("Line Chart"))
        add_line_chart.props.icon_name = "line"
        add_line_chart.props.group = charts_group
        toolbarbox.toolbar.insert(add_line_chart, -1)

        add_pie_chart = RadioToolButton()
        add_pie_chart.connect("clicked", self._add_chart_cb, "pie")
        add_pie_chart.set_tooltip(_("Pie Chart"))
        add_pie_chart.props.icon_name = "pie"
        add_pie_chart.props.group = charts_group
        add_pie_chart.set_active(True)
        toolbarbox.toolbar.insert(add_pie_chart, -1)

        self.chart_type_buttons = [add_vbar_chart,
                                   add_hbar_chart,
                                   add_line_chart,
                                   add_pie_chart]

        separator = gtk.SeparatorToolItem()
        separator.set_draw(True)
        separator.set_expand(False)
        toolbarbox.toolbar.insert(separator, -1)

        options_button = ToolbarButton(icon_name='preferences-system')
        options_toolbar = gtk.Toolbar()

        self.chart_color_btn = ColorToolButton()
        self.chart_color_btn.set_color(COLOR1)
        self.chart_color_btn.set_title(_("Chart Color"))
        self.chart_color_btn.connect('notify::color', self._set_chart_color)
        options_toolbar.insert(self.chart_color_btn, -1)

        self.line_color_btn = ColorToolButton()
        self.line_color_btn.set_color(COLOR2)
        self.line_color_btn.set_title(_("Line Color"))
        self.line_color_btn.connect('notify::color',
                self._set_chart_line_color)
        options_toolbar.insert(self.line_color_btn, -1)

        separator = gtk.SeparatorToolItem()
        separator.set_draw(True)
        separator.set_expand(False)
        options_toolbar.insert(separator, -1)

        h_label_icon = Icon(icon_name="hlabel")
        h_label_tool_item = gtk.ToolItem()
        h_label_tool_item.add(h_label_icon)
        options_toolbar.insert(h_label_tool_item, -1)

        self.h_label = Entry(_("Horizontal label..."))
        self.h_label.entry.connect("changed", self._set_h_label)
        options_toolbar.insert(self.h_label, -1)

        separator = gtk.SeparatorToolItem()
        separator.set_draw(False)
        separator.set_expand(False)
        options_toolbar.insert(separator, -1)

        v_label_icon = Icon(icon_name="vlabel")
        v_label_tool_item = gtk.ToolItem()
        v_label_tool_item.add(v_label_icon)
        options_toolbar.insert(v_label_tool_item, -1)

        self.v_label = Entry(_("Vertical label..."))
        self.v_label.entry.connect("changed", self._set_v_label)
        options_toolbar.insert(self.v_label, -1)

        options_button.props.page = options_toolbar
        options_toolbar.show_all()

        toolbarbox.toolbar.insert(options_button, -1)

        separator = gtk.SeparatorToolItem()
        separator.set_draw(True)
        separator.set_expand(False)
        toolbarbox.toolbar.insert(separator, -1)

        fullscreen_btn = ToolButton('view-fullscreen')
        fullscreen_btn.set_tooltip(_('Fullscreen'))
        fullscreen_btn.connect("clicked", self.__fullscreen_cb)

        toolbarbox.toolbar.insert(fullscreen_btn, -1)

        separator = gtk.SeparatorToolItem()
        separator.set_draw(False)
        separator.set_expand(True)
        toolbarbox.toolbar.insert(separator, -1)

        stopbtn = StopButton(self)
        toolbarbox.toolbar.insert(stopbtn, -1)

        self.set_toolbar_box(toolbarbox)

        # CANVAS
        paned = gtk.HPaned()
        box = gtk.VBox()
        self.box = box

        # Set the info box width to 1/3 of the screen:
        def size_allocate_cb(widget, allocation):
            paned.disconnect(self._setup_handle)
            box_width = allocation.width / 3
            box.set_size_request(box_width, -1)

        self._setup_handle = paned.connect('size_allocate',
                    size_allocate_cb)

        scroll = gtk.ScrolledWindow()
        scroll.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
        self.labels_and_values = ChartData(self)
        scroll.add(self.labels_and_values)

        self.labels_and_values.connect("label-changed", self._label_changed)
        self.labels_and_values.connect("value-changed", self._value_changed)

        box.pack_start(scroll, True, True, 0)

        paned.add1(box)

        # CHARTS AREA

        eventbox = gtk.EventBox()
        self.charts_area = ChartArea(self)

        eventbox.modify_bg(gtk.STATE_NORMAL, WHITE)

        eventbox.add(self.charts_area)
        paned.add2(eventbox)

        self.set_canvas(paned)

        # Sharing
        self._setup_presence_service()
        self._sharing = False

        self.show_all()

    def _add_value(self, widget, label="", value="0.0"):
        data = (label, float(value))
        if not data in self.chart_data:
            pos = self.labels_and_values.add_value(label, value)
            self.chart_data.insert(pos, data)
            self._update_chart_data()

    def _remove_value(self, widget):
        path = self.labels_and_values.remove_selected_value()
        del self.chart_data[path]
        self._update_chart_data()

    def _add_chart_cb(self, widget, type="vbar"):
        self.current_chart = Chart(type)

        self.update_chart()

    def unfullscreen(self):
        self.box.show()
        activity.Activity.unfullscreen(self)

        # A reasonable time for the system
        gobject.timeout_add(50, self._render_chart, False)

    def __fullscreen_cb(self, button):
        self.box.hide()
        self._render_chart(fullscreen=True)
        activity.Activity.fullscreen(self)

    def _render_chart(self, fullscreen=False):
        if self.current_chart is None or self.charts_area is None:
            return

        try:
            # Resize the chart for all the screen sizes
            x, y, w, h = self.get_allocation()

            if fullscreen:
                new_width = w
                new_height = h

            if not fullscreen:
                sx, sy, width, height = self.charts_area.get_allocation()

                new_width = width - 40
                new_height = height - 40

            self.current_chart.width = new_width
            self.current_chart.height = new_height

            # Set options
            self.current_chart.set_color_scheme(color=self.chart_color)
            self.current_chart.set_line_color(self.chart_line_color)

            if self.current_chart.type == "pie":
                self.current_chart.render(self)
            else:
                self.current_chart.render()
            self.charts_area.queue_draw()

        except (ZeroDivisionError, ValueError):
            pass

        return False

    def _update_chart_data(self):
        if self.current_chart is None:
            return
        self.current_chart.data_set(self.chart_data)
        self._render_chart()

        # Send data
        self._send_chart_data(self.chart_data)

    def _update_chart_labels(self):
        if self.current_chart is None:
            return
        self.current_chart.set_x_label(self.x_label)
        self.current_chart.set_y_label(self.y_label)
        self._render_chart()

    def update_chart(self):
        if self.current_chart:
            self.current_chart.data_set(self.chart_data)
            self.current_chart.set_title(self.metadata["title"])
            self.current_chart.set_x_label(self.x_label)
            self.current_chart.set_y_label(self.y_label)
            self._render_chart()

    def _label_changed(self, tw, path, new_label):
        path = int(path)
        self.chart_data[path] = (new_label, self.chart_data[path][1])
        self._update_chart_data()

    def _value_changed(self, tw, path, new_value):
        path = int(path)
        self.chart_data[path] = (self.chart_data[path][0], float(new_value))
        self._update_chart_data()

    def _set_h_label(self, widget):
        new_text = widget.get_text()

        if new_text != self.h_label.text:
            self.x_label = new_text
            self._update_chart_labels()

    def _set_v_label(self, widget):
        new_text = widget.get_text()

        if new_text != self.v_label.text:
            self.y_label = new_text
            self._update_chart_labels()

    def _set_chart_color(self, widget, pspec):
        self.chart_color = utils.rgb_to_html(widget.get_color())
        self._render_chart()

    def _set_chart_line_color(self, widget, pspec):
        self.chart_line_color = utils.rgb_to_html(widget.get_color())
        self._render_chart()

    # Sharing activity
    def _setup_presence_service(self):
        """Setup the Presence Service."""
        self.pservice = presenceservice.get_instance()
        self.initiating = None  # sharing (True) or joining (False)

        owner = self.pservice.get_owner()
        self.owner = owner
        self._share = ""
        self.connect('shared', self._shared_cb)
        self.connect('joined', self._joined_cb)

    def _shared_cb(self, activity):
        """Either set up initial share..."""
        self._new_tube_common(True)
        self._sharing = True

    def _joined_cb(self, activity):
        """...or join an exisiting share."""
        self._new_tube_common(False)
        #self._sharing = True: FIXME, Mysterious bugs

    def _new_tube_common(self, sharer):
        """Joining and sharing are mostly the same..."""
        if self._shared_activity is None:
            _logger.debug("Error: Failed to share or join activity ... \
                _shared_activity is null in _shared_cb()")
            return

        self.initiating = sharer
        self.waiting_for_hand = not sharer

        self.conn = self._shared_activity.telepathy_conn
        self.tubes_chan = self._shared_activity.telepathy_tubes_chan
        self.text_chan = self._shared_activity.telepathy_text_chan

        self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES].connect_to_signal(
            'NewTube', self._new_tube_cb)

        if sharer:
            _logger.debug('This is my activity: making a tube...')
            id = self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES].OfferDBusTube(
                SERVICE, {})
        else:
            _logger.debug('I am joining an activity: waiting for a tube...')
            self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES].ListTubes(
                reply_handler=self._list_tubes_reply_cb,
                error_handler=self._list_tubes_error_cb)

    def _list_tubes_reply_cb(self, tubes):
        """Reply to a list request."""
        for tube_info in tubes:
            self._new_tube_cb(*tube_info)

    def _list_tubes_error_cb(self, e):
        """Log errors."""
        _logger.debug('Error: ListTubes() failed: %s' % (e))

    def _new_tube_cb(self, id, initiator, type, service, params, state):
        """Create a new tube."""
        _logger.debug('New tube: ID=%d initator=%d type=%d service=%s \
params=%r state=%d' % (id, initiator, type, service, params, state))

        if (type == telepathy.TUBE_TYPE_DBUS and service == SERVICE):
            if state == telepathy.TUBE_STATE_LOCAL_PENDING:
                self.tubes_chan[ \
                              telepathy.CHANNEL_TYPE_TUBES].AcceptDBusTube(id)

            tube_conn = TubeConnection(self.conn,
                self.tubes_chan[telepathy.CHANNEL_TYPE_TUBES], id, \
                group_iface=self.text_chan[telepathy.CHANNEL_INTERFACE_GROUP])

            self.chattube = ChatTube(tube_conn, self.initiating, \
               self.chart_data_received_cb)

    def chart_data_received_cb(self, data):
        _io_str = StringIO(data)
        chart_data = list(simplejson.load(_io_str))

        self.labels_and_values.model.clear()
        self.chart_data = []

        # Load the data
        for row  in chart_data:
            self._add_value(None, label=row[0], value=float(row[1]))

        self.update_chart()

    def _send_chart_data(self, data):
        if self._sharing:
            _io_str = StringIO()
            simplejson.dump(tuple(data), _io_str)
            _logger.info('Sending chart data...')

            self.chattube.SendText(_io_str.getvalue())

    def _object_chooser(self, mime_type, type_name):
        chooser = ObjectChooser()
        matches_mime_type = False

        response = chooser.run()
        if response == gtk.RESPONSE_ACCEPT:
            jobject = chooser.get_selected_object()
            metadata = jobject.metadata
            file_path = jobject.file_path

            if metadata['mime_type'] == mime_type:
                matches_mime_type = True

            else:
                alert = Alert()

                alert.props.title = _('Invalid object')
                alert.props.msg = \
                       _('The selected object must be a %s file' % (type_name))

                ok_icon = Icon(icon_name='dialog-ok')
                alert.add_button(gtk.RESPONSE_OK, _('Ok'), ok_icon)
                ok_icon.show()

                alert.connect('response', lambda a, r: self.remove_alert(a))

                self.add_alert(alert)

                alert.show()

        return matches_mime_type, file_path, metadata['title']

    def _graph_from_reader(self, reader):
        self.labels_and_values.model.clear()
        self.chart_data = []

        chart_data = reader.get_chart_data()

        h, v = reader.get_labels_name()

        self.v_label.entry.set_text(h)
        self.h_label.entry.set_text(v)

        # Load the data
        for row  in chart_data:
            self._add_value(None,
                            label=row[0], value=float(row[1]))

            self.update_chart()

    def __import_stopwatch_cb(self, widget):
        matches_mime_type, file_path, title = self._object_chooser(
                                                      STOPWATCH_MIME_TYPE,
                                                      _('StopWatch'))

        if matches_mime_type:
            f = open(file_path)
            reader = StopWatchReader(f)
            self._graph_from_reader(reader)

            f.close()

    def __import_measure_cb(self, widget):
        matches_mime_type, file_path, title = self._object_chooser(
                                                         CSV_MIME_TYPE,
                                                         _('Measure'))

        if matches_mime_type:
            f = open(file_path)
            reader = MeasureReader(f)
            self._graph_from_reader(reader)

            f.close()

    def _save_as_image(self, widget):
        if self.current_chart:
            jobject = datastore.create()

            jobject.metadata['title'] = self.metadata["title"]
            jobject.metadata['mime_type'] = "image/png"

            self.current_chart.as_png(CHART_FILE)
            jobject.set_file_path(CHART_FILE)

            datastore.write(jobject)

    def write_file(self, file_path):
        self.metadata['mime_type'] = "activity/x-simplegraph"
        if self.current_chart:

            data = {}
            data['title'] = self.metadata["title"]
            data['x_label'] = self.x_label
            data['y_label'] = self.y_label
            data['chart_color'] = self.chart_color
            data['chart_line_color'] = self.chart_line_color
            data['current_chart.type'] = self.current_chart.type
            data['chart_data'] = self.chart_data

            f = open(file_path, 'w')
            try:
                simplejson.dump(data, f)
            finally:
                f.close()

    def read_file(self, file_path):
        f = open(file_path, 'r')
        try:
            data = simplejson.load(f)
        finally:
            f.close()

        self.metadata["title"] = data['title']
        self.x_label = data['x_label']
        self.y_label = data['y_label']
        self.chart_color = data['chart_color']
        self.chart_line_color = data['chart_line_color']
        self.current_chart.type = data['current_chart.type']
        chart_data = data['chart_data']

        # Update charts buttons
        type = data["current_chart.type"]
        if type == "vbar":
            self.chart_type_buttons[0].set_active(True)

        elif type == "hbar":
            self.chart_type_buttons[1].set_active(True)

        elif type == "line":
            self.chart_type_buttons[2].set_active(True)

        elif type == "pie":
            self.chart_type_buttons[3].set_active(True)

        # Update the controls in the config subtoolbar
        self.chart_color_btn.set_color(gtk.gdk.Color(self.chart_color))
        self.line_color_btn.set_color(gtk.gdk.Color(self.chart_line_color))

        # If the saved label is not '', set the text entry with the saved label
        if self.x_label != '':
            self.h_label.entry.set_text(self.x_label)

        if self.y_label != '':
            self.v_label.entry.set_text(self.y_label)

        #load the data
        for row  in chart_data:
            self._add_value(None, label=row[0], value=float(row[1]))

        self.update_chart()


class ChatTube(ExportedGObject):
    """ Class for setting up tube for sharing """

    def __init__(self, tube, is_initiator, stack_received_cb):
        super(ChatTube, self).__init__(tube, PATH)
        self.tube = tube
        self.is_initiator = is_initiator  # Are we sharing or joining activity?
        self.stack_received_cb = stack_received_cb
        self.stack = ''

        self.tube.add_signal_receiver(self.send_stack_cb, 'SendText', IFACE,
                                      path=PATH, sender_keyword='sender')

    def send_stack_cb(self, text, sender=None):
        if sender == self.tube.get_unique_name():
            return
        self.stack = text
        self.stack_received_cb(text)

    @signal(dbus_interface=IFACE, signature='s')
    def SendText(self, text):
        self.stack = text


class ChartData(gtk.TreeView):

    __gsignals__ = {
             'label-changed': (gobject.SIGNAL_RUN_FIRST, None, [str, str], ),
             'value-changed': (gobject.SIGNAL_RUN_FIRST, None, [str, str], ), }

    def __init__(self, activity):

        gtk.TreeView.__init__(self)

        self.model = gtk.ListStore(str, str)
        self.set_model(self.model)

        # Label column

        column = gtk.TreeViewColumn(_("Label"))
        label = gtk.CellRendererText()
        label.set_property('editable', True)
        label.connect("edited", self._label_changed, self.model)

        column.pack_start(label)
        column.set_attributes(label, text=0)
        self.append_column(column)

        # Value column

        column = gtk.TreeViewColumn(_("Value"))
        value = gtk.CellRendererText()
        value.set_property('editable', True)
        value.connect("edited", self._value_changed, self.model, activity)

        column.pack_start(value)
        column.set_attributes(value, text=1)

        self.append_column(column)
        self.set_enable_search(False)

        self.show_all()

    def add_value(self, label, value):
        selected = self.get_selection().get_selected()[1]
        if not selected:
            path = 0

        elif selected:
            path = self.model.get_path(selected)[0] + 1

        iter = self.model.insert(path, [label, value])

        self.set_cursor(self.model.get_path(iter),
                        self.get_column(1),
                        True)

        _logger.info("Added: %s, Value: %s" % (label, value))

        return path

    def remove_selected_value(self):
        path, column = self.get_cursor()
        path = path[0]

        model, iter = self.get_selection().get_selected()
        self.model.remove(iter)

        return path

    def _label_changed(self, cell, path, new_text, model):
        _logger.info("Change '%s' to '%s'" % (model[path][0], new_text))
        model[path][0] = new_text

        self.emit("label-changed", str(path), new_text)

    def _value_changed(self, cell, path, new_text, model, activity):
        _logger.info("Change '%s' to '%s'" % (model[path][1], new_text))
        is_number = True
        number = new_text.replace(",", ".")
        try:
            float(number)
        except:
            is_number = False

        if is_number:
            decimals = utils.get_decimals(str(float(number)))
            new_text = locale.format('%.' + decimals + 'f', float(number))
            model[path][1] = str(new_text)

            self.emit("value-changed", str(path), number)

        elif not is_number:
            alert = Alert()

            alert.props.title = _('Invalid Value')
            alert.props.msg = \
                           _('The value must be a number (integer or decimal)')

            ok_icon = Icon(icon_name='dialog-ok')
            alert.add_button(gtk.RESPONSE_OK, _('Ok'), ok_icon)
            ok_icon.show()

            alert.connect('response', lambda a, r: activity.remove_alert(a))

            activity.add_alert(alert)

            alert.show()


class Entry(gtk.ToolItem):

    def __init__(self, text):
        gtk.ToolItem.__init__(self)

        self.entry = gtk.Entry()
        self.entry.set_text(text)
        self.entry.connect("focus-in-event", self._focus_in)
        self.entry.connect("focus-out-event", self._focus_out)
        self.entry.modify_font(pango.FontDescription("italic"))

        self.text = text

        self.add(self.entry)

        self.show_all()

    def _focus_in(self, widget, event):
        if widget.get_text() == self.text:
            widget.set_text("")
            widget.modify_font(pango.FontDescription(""))

    def _focus_out(self, widget, event):
        if widget.get_text() == "":
            widget.set_text(self.text)
            widget.modify_font(pango.FontDescription("italic"))