-
Notifications
You must be signed in to change notification settings - Fork 35
Expand file tree
/
Copy pathother.html
More file actions
1700 lines (1700 loc) · 43.1 KB
/
Copy pathother.html
File metadata and controls
1700 lines (1700 loc) · 43.1 KB
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
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta content="App Inventor for Android" name="description" />
<meta content="Android, Blocks App Inventor, Mobile, Phone, IDE" name="keywords" />
<title>
Other Components - App Inventor for Android
</title>
<link href="/static/images/appinventor-16.png" rel="SHORTCUT ICON" type="image/ico" />
<link href="/static/images/appinventor-16.png" rel="icon" type="image/png" />
<link href="/static/css/appinventor.css" rel="stylesheet" />
<script src="http://www.google.com/js/gweb/analytics/autotrack.js">
</script>
<script>
var tracker = new gweb.analytics.AutoTrack({
profile: 'UA-5856106-2'
});
</script>
<script language = "JavaScript" src="/static/scripts/HeaderAndFooter.js"></script>
<style>
img.c5 {border-width:0}
li.c4 {list-style: none; display: inline}
li.c3 {list-style: none}
code.c2 {font-style: italic}
div.c1 {clear:both;}
</style>
</head>
<body>
<script language = "JavaScript">createHeader('<div id="navigation-breadcrumb"> <a href="/learn/">Learn</a> > <a href="/learn/reference/">Reference</a> > Other > ');</script><br>
<div id="aiac">
<div class="main-container">
<div class="customhr customhr-gray">
</div>
<div class="content">
<div class="content-body">
<div class="learn-page">
<h1>
Other Components
</h1>
<ul>
<li>
<a href="#ActivityStarter">
ActivityStarter
</a>
</li>
<li>
<a href="#BarcodeScanner">
BarcodeScanner
</a>
</li>
<li>
<a href="#BluetoothClient">
BluetoothClient
</a>
</li>
<li>
<a href="#BluetoothServer">
BluetoothServer
</a>
</li>
<li>
<a href="#Notifier">
Notifier
</a>
</li>
<li>
<a href="#SpeechRecognizer">
SpeechRecognizer
</a>
</li>
<li>
<a href="#TextToSpeech">
TextToSpeech
</a>
</li>
<li>
<a href="#TinyWebDB">
TinyWebDB
</a>
</li>
<li>
<a href="#Web">
Web
</a>
</li>
</ul>
<h2 id="ActivityStarter">
ActivityStarter
</h2>
<img alt="Picture of Activity Starter component" src="images/activitystarter.png" />
<p>
A component that can launch another activity from your application.
</p>
<p>
You communicate with the activity starter by setting properties of the component to
pass information related to the activity, including the action and activity class.
See
<a href="/learn/reference/other/activitystarter.html">
Using the Activity
Starter Component
</a>
for details and examples.
</p>
<p>
Activities that can be launched include:
</p>
<ul>
<li>
Starting another App Inventor for Android app. To do so, first determine
<em>
class
</em>
of the other application by downloading the source code and using a
file explorer or unzip utility to find a file named
"youngandroidproject/project.properties". The first line of the file will start
with "main=" and be followed by the class name; for example,
<p>
<code>
main=com.gmail.Bitdiddle.Ben.HelloPurr.Screen1
</code>
</p>
<p>
To make your
<code>
ActivityStarter
</code>
launch this application, set the
following properties:
</p>
<ul>
<li>
<code>
ActivityPackage
</code>
to the class name, dropping the last component
(for example,
<code>
com.gmail.Bitdiddle.Ben.HelloPurr
</code>
)
</li>
<li>
<code>
ActivityClass
</code>
to the entire class name (for example,
<code>
com.gmail.Bitdiddle.Ben.HelloPurr.Screen1
</code>
)
</li>
</ul>
</li>
<li>
Starting an activity that is built in to the Android OS, such as using the
camera, or performing a web search. You can start camera by setting the following
properties:
<ul>
<li>
<code>
Action: android.intent.action.MAIN
</code>
</li>
<li>
<code>
ActivityPackage: com.android.camera
</code>
</li>
<li>
<code>
ActivityClass: com.android.camera.Camera
</code>
</li>
</ul>
</li>
<li>
Performing web search: Assuming the term you want to search for is "vampire"
(feel free to substitute your own choice), set the properties to:
<ul>
<li>
<code>
Action: android.intent.action.WEB_SEARCH
</code>
</li>
<li>
<code>
ExtraKey: query
</code>
</li>
<li>
<code>
ExtraValue: vampire
</code>
</li>
<li>
<code>
ActivityPackage:
com.google.android.providers.enhancedgooglesearch
</code>
</li>
<li>
<code>
ActivityClass:
com.google.android.providers.enhancedgooglesearch.Launcher
</code>
</li>
</ul>
</li>
<li>
Opening a browser to a specified web page. Assuming the page you want to go to
is "www.facebook.com" (feel free to substitute your own choice), set the properties
to:
<ul>
<li>
<code>
Action: android.intent.action.VIEW
</code>
</li>
<li>
<code>
DataUri: http://www.facebook.com
</code>
</li>
</ul>
</li>
</ul>
<p>
You can also launch third-party applications installed on the phone, provided you
know the appropriate
<em>
intents
</em>
to invoke them, and you can also launch
activities that produce text results and get them back to use in your application.
The way this data is extracted depends on how the application has been implemented.
</p>
<h3>
Properties
</h3>
<dl>
<dt>
<code>
Action
</code>
: text
</dt>
<dd>
Action of the activity to be launched.
</dd>
<dt>
<code>
ActivityClass
</code>
: text
</dt>
<dd>
Class name of the activity to be launched.
</dd>
<dt>
<code>
ActivityPackage
</code>
: text
</dt>
<dd>
Package name of the activity to be launched.
</dd>
<dt>
<code>
DataUri
</code>
: text
</dt>
<dd>
URI passed to activity to be launched.
</dd>
<dt>
<code>
ExtraKey
</code>
: text
</dt>
<dd>
Key name of text passed to the activity.
</dd>
<dt>
<code>
ExtraValue
</code>
: text
</dt>
<dd>
Value of text passed to the activity.
</dd>
<dt>
<code class="c2">
Result
</code>
: text
</dt>
<dd>
Value returned by the activity being started.
</dd>
<dt>
<code>
ResultName
</code>
: text
</dt>
<dd>
The name used to extract the result returned from the activity being started.
</dd>
<dt>
<code class="c2">
ResultType
</code>
: text
</dt>
<dd>
Type information returned from the activity being started.
</dd>
<dt>
<code class="c2">
ResultUri
</code>
: text
</dt>
<dd>
URI (or Data) information returned from the activity being started.
</dd>
</dl>
<h3>
Events
</h3>
<dl>
<dt>
<code>
ActivityError(text message)
</code>
>
</dt>
<dd>
Indicates that an error occurred while using this ActivityStarter.
</dd>
<dt>
<code>
AfterActivity(text result)
</code>
</dt>
<dd>
Called after activity ends.
</dd>
</dl>
<h3>
Methods
</h3>
<dl>
<dt>
text
<code>
ResolveActivity
</code>
()
</dt>
<dd>
Returns the name of the activity that corresponds to this ActivityStarter, or an
empty string if no corresponding activity can be found. You can use this before
starting an external application to ensure that the application is installed on
the phone.
</dd>
<dt>
<code>
StartActivity()
</code>
</dt>
<dd>
Start the activity associated with this component.
</dd>
</dl>
<h2 id="BarcodeScanner">
BarcodeScanner
</h2>
<img alt="Picture of Barcode Scanner component" src="images/barcodescanner.png" />
<p>
This non-visible component uses the phone's camera to read a 1-dimensional barcode
or 2-dimensional barcode (QR code). In order for this component to work, the
Barcode scanner app from ZXing must be installed on the phone. This app is
available for free in the Android Market.
</p>
<h3>
Properties
</h3>
<dl>
<dt>
<code class="c2">
Result
</code>
</dt>
<dd>
The text result of the last successful scan. This becomes available after
<code>
AfterScan
</code>
has been signaled. This value is also returned as the
<code>
result
</code>
value.
</dd>
</dl>
<h3>
Methods
</h3>
<dl>
<dt>
<code>
DoScan()
</code>
</dt>
<dd>
Start a scan
</dd>
</dl>
<h3>
Events
</h3>
<dl>
<dt>
<code>
AfterScan(text result)
</code>
</dt>
<dd>
Called after scanning ends.
</dd>
</dl>
<h2 id="BluetoothClient">
BluetoothClient
</h2>
<img alt="Picture of Bluetooth Client component" src="images/bluetoothclient.png" />
<p>
Bluetooth client component
</p>
<h3>
Properties
</h3>
<dl>
<dt>
<code>
<em>
AddressesAndNames
</em>
</code>
</dt>
<dd>
A list of the addresses and names of paired Bluetooth devices.
</dd>
<dt>
<code>
<em>
Available
</em>
</code>
</dt>
<dd>
Tell whether Bluetooth is available on the Android device.
</dd>
<dt>
<code>
CharacterEncoding
</code>
</dt>
<dd>
The character encoding to use when sending and receiving text.
</dd>
<dt>
<code>
DelimiterByte
</code>
</dt>
<dd>
The delimiter byte to use when passing a negative number for the numberOfBytes
parameter when calling ReceiveText, ReceiveSignedBytes, or ReceiveUnsignedBytes.
</dd>
<dt>
<code>
<em>
Enabled
</em>
</code>
</dt>
<dd>
Tell whether Bluetooth is enabled.
</dd>
<dt>
<code>
HighByteFirst
</code>
</dt>
<dd>
Whether 2 and 4 byte numbers should be sent and received with the high (or most
significant) byte first. Check the documentation for the device with which your
app will be communicating for the appropriate setting. This is also known as
big-endian.
</dd>
<dt>
<code>
<em>
IsConnected
</em>
</code>
</dt>
<dd>
Tell whether a Bluetooth connection has been made.
</dd>
</dl>
<h3>
Events
</h3>
none
<h3>
Methods
</h3>
<dl>
<dt>
<code>
number BytesAvailableToReceive()
</code>
</dt>
<dd>
Returns an estimate of the number of bytes that can be received without blocking
</dd>
<dt>
<code>
boolean Connect(text address)
</code>
</dt>
<dd>
Connect to the Bluetooth device with the specified address and the Serial Port
Profile (SPP). Returns true if the connection was successful. The address
parameter can contain extra characters after the MAC address if there is a space
immediately after the MAC address. This means that you may pass an item from the
list returned from the AddressesAndNames property without splitting apart the
address and the name.
</dd>
<dt>
<code>
boolean ConnectWithUUID(text address, text uuid)
</code>
</dt>
<dd>
Connect to the Bluetooth device with the specified address and UUID. Returns true
if the connection was successful. The address parameter can contain extra
characters after the MAC address if there is a space immediately after the MAC
address. This means that you may pass an item from the list returned from the
AddressesAndNames property without splitting apart the address and the name.
</dd>
<dt>
<code>
Disconnect()
</code>
</dt>
<dd>
Disconnect from the connected Bluetooth device.
</dd>
<dt>
<code>
boolean IsDevicePaired(text address)
</code>
</dt>
<dd>
Checks whether the Bluetooth device with the specified address is paired.
</dd>
<dt>
<code>
number ReceiveSigned1ByteNumber()
</code>
</dt>
<dd>
Receive a signed 1-byte number from the connected Bluetooth device.
</dd>
<dt>
<code>
number ReceiveSigned2ByteNumber()
</code>
</dt>
<dd>
Receive a signed 2-byte number from the connected Bluetooth device.
</dd>
<dt>
<code>
number ReceiveSigned4ByteNumber()
</code>
</dt>
<dd>
Receive a signed 4-byte number from the connected Bluetooth device.
</dd>
<dt>
<code>
list ReceiveSignedBytes(number numberOfBytes)
</code>
</dt>
<dd>
Receive multiple signed byte values from the connected Bluetooth device. If
numberOfBytes is less than 0, read until a delimiter byte value is received.
</dd>
<dt>
<code>
text ReceiveText(number numberOfBytes)
</code>
</dt>
<dd>
Receive text from the connected Bluetooth device. If numberOfBytes is less than
0, read until a delimiter byte value is received.
</dd>
<dt>
<code>
number ReceiveUnsigned1ByteNumber()
</code>
</dt>
<dd>
Receive an unsigned 1-byte number from the connected Bluetooth device.
</dd>
<dt>
<code>
number ReceiveUnsigned2ByteNumber()
</code>
</dt>
<dd>
Receive a unsigned 2-byte number from the connected Bluetooth device.
</dd>
<dt>
<code>
number ReceiveUnsigned4ByteNumber()
</code>
</dt>
<dd>
Receive a unsigned 4-byte number from the connected Bluetooth device.
</dd>
<dt>
<code>
list ReceiveUnsignedBytes(number numberOfBytes)
</code>
</dt>
<dd>
Receive multiple unsigned byte values from the connected Bluetooth device. If
numberOfBytes is less than 0, read until a delimiter byte value is received.
</dd>
<dt>
<code>
Send1ByteNumber(text number)
</code>
</dt>
<dd>
Send a 1-byte number to the connected Bluetooth device.
</dd>
<dt>
<code>
Send2ByteNumber(text number)
</code>
</dt>
<dd>
Send a 2-byte number to the connected Bluetooth device.
</dd>
<dt>
<code>
Send4ByteNumber(text number)
</code>
</dt>
<dd>
Send a 4-byte number to the connected Bluetooth device.
</dd>
<dt>
<code>
SendBytes(list list)
</code>
</dt>
<dd>
Send a list of byte values to the connected Bluetooth device.
</dd>
<dt>
<code>
SendText(text text)
</code>
</dt>
<dd>
Send text to the connected Bluetooth device.
</dd>
</dl>
<h2 id="BluetoothServer">
BluetoothServer
</h2>
<img alt="Picture of Bluetooth Server component" src="images/bluetoothserver.png" />
<p>
Bluetooth server component
</p>
<h3>
Properties
</h3>
<dl>
<dt>
<code>
Available: boolean
</code>
</dt>
<dd>
Tell whether Bluetooth is available on the Android device.
</dd>
<dt>
<code>
CharacterEncoding: text
</code>
</dt>
<dd>
The character encoding to use when sending and receiving text.
</dd>
<dt>
<code>
DelimiterByte: number
</code>
</dt>
<dd>
The delimiter byte to use when passing a negative number for the numberOfBytes
parameter when calling ReceiveText, ReceiveSignedBytes, or ReceiveUnsignedBytes.
</dd>
<dt>
<code>
Enabled: boolean
</code>
</dt>
<dd>
Tell whether Bluetooth is enabled.
</dd>
<dt>
<code>
HighByteFirst: boolean
</code>
</dt>
<dd>
Whether 2 and 4 byte numbers should be sent and received with the high (or most
significant) byte first. Check the documentation for the device with which your
app will be communicating for the appropriate setting. This is also known as
big-endian.
</dd>
<dt>
<code>
IsAccepting: boolean
</code>
</dt>
<dd>
Tell whether this BluetoothServer component is accepting an incoming connection.
</dd>
<dt>
<code>
IsConnected: boolean
</code>
</dt>
<dd>
Tell whether a Bluetooth connection has been made.
</dd>
</dl>
<h3>
Events
</h3>
<dl>
<dt>
<code>
ConnectionAccepted()
</code>
</dt>
<dd>
Indicates that a bluetooth connection has been accepted.
</dd>
</dl>
<h3>
Methods
</h3>
<dl>
<dt>
<code>
AcceptConnection(text serviceName)
</code>
</dt>
<dd>
Accept an incoming connection with the Serial Port Profile (SPP).
</dd>
<dt>
<code>
AcceptConnectionWithUUID(text serviceName, text uuid)
</code>
</dt>
<dd>
Accept an incoming connection with a specific UUID.
</dd>
<dt>
<code>
number BytesAvailableToReceive()
</code>
</dt>
<dd>
Returns an estimate of the number of bytes that can be received without blocking
</dd>
<dt>
<code>
Disconnect()
</code>
</dt>
<dd>
Disconnect from the connected Bluetooth device.
</dd>
<dt>
<code>
number ReceiveSigned1ByteNumber()
</code>
</dt>
<dd>
Receive a signed 1-byte number from the connected Bluetooth device.
</dd>
<dt>
<code>
number ReceiveSigned2ByteNumber()
</code>
</dt>
<dd>
Receive a signed 2-byte number from the connected Bluetooth device.
</dd>
<dt>
<code>
number ReceiveSigned4ByteNumber()
</code>
</dt>
<dd>
Receive a signed 4-byte number from the connected Bluetooth device.
</dd>
<dt>
<code>
list ReceiveSignedBytes(number numberOfBytes)
</code>
</dt>
<dd>
Receive multiple signed byte values from the connected Bluetooth device. If
numberOfBytes is less than 0, read until a delimiter byte value is received.
</dd>
<dt>
<code>
text ReceiveText(number numberOfBytes)
</code>
</dt>
<dd>
Receive text from the connected Bluetooth device. If numberOfBytes is less than
0, read until a delimiter byte value is received.
</dd>
<dt>
<code>
number ReceiveUnsigned1ByteNumber()
</code>
</dt>
<dd>
Receive an unsigned 1-byte number from the connected Bluetooth device.
</dd>
<dt>
<code>
number ReceiveUnsigned2ByteNumber()
</code>
</dt>
<dd>
Receive a unsigned 2-byte number from the connected Bluetooth device.
</dd>
<dt>
<code>
number ReceiveUnsigned4ByteNumber()
</code>
</dt>
<dd>
Receive a unsigned 4-byte number from the connected Bluetooth device.
</dd>
<dt>
<code>
list ReceiveUnsignedBytes(number numberOfBytes)
</code>
</dt>
<dd>
Receive multiple unsigned byte values from the connected Bluetooth device. If
numberOfBytes is less than 0, read until a delimiter byte value is received.
</dd>
<dt>
<code>
Send1ByteNumber(text number)
</code>
</dt>
<dd>
Send a 1-byte number to the connected Bluetooth device.
</dd>
<dt>
<code>
Send2ByteNumber(text number)
</code>
</dt>
<dd>
Send a 2-byte number to the connected Bluetooth device.
</dd>
<dt>
<code>
Send4ByteNumber(text number)
</code>
</dt>
<dd>
Send a 4-byte number to the connected Bluetooth device.
</dd>
<dt>
<code>
SendBytes(list list)
</code>
</dt>
<dd>
Send a list of byte values to the connected Bluetooth device.
</dd>
<dt>
<code>
SendText(text text)
</code>
</dt>
<dd>
Send text to the connected Bluetooth device.
</dd>
<dt>
<code>
StopAccepting()
</code>
</dt>
<dd>
Stop accepting an incoming connection.
</dd>
</dl>
<h2 id="Notifier">
Notifier
</h2>
<img alt="Picture of Notifier component" src="images/notifier.png" />
<p>
A notifier is a non-visible component that can show verious kinds of alerts and can
log information. Use a notifier to display notices and alerts to users of your app,
and also to log information that can help you debug your app.
</p>
<h3>
Methods
</h3>
<dl>
<dt>
<code>
ShowMessageDialog(Text message, Text title, Text buttonText)
</code>
</dt>
<dd>
Pops up a notice that remains until the user taps a button with the given text.
The arguments are the message to be shown, the title of the notice, and the label
on the button.
</dd>
<dt>
<code>
ShowChooseDialog(Text message, Text title, Text button1Text, Text
button2Text)
</code>
</dt>
<dd>
Pops up a notice the user must respond to by tapping one of two buttons with the
given text. The arguments are the message to be shown, the title of the notice,
and the labels on the left and right buttons, respectively. The
<code>
AfterChoosing
</code>
event is signalled after the user taps one of the
buttons.
</dd>
<dt>
<code>
ShowTextDialog(Text message, Text title)
</code>
</dt>
<dd>
Pops up a notice which the user must respond to by entering some text. The
arguments are the message to be shown and the title of the notice. The
<code>
AfterTextInput
</code>
event is signalled after the user enters the text.
</dd>
<dt>
<code>
ShowAlert(Text message
</code>
</dt>
<dd>
Pops up a temporary notice, which vanishes after a few seconds. The argument is
the text of the notice.
</dd>
<dt>
<code>
LogError(Text message)
</code>