Tcl Requires Chilkat v11.7.0+

QR Code Numeric, Alphanumeric and Byte Modes

See more QR Code Examples

Demonstrates the QR encoding modes. Digits alone are stored in numeric mode, and text made only of digits, upper-case letters, space and $ % * + - . / : in alphanumeric mode. Both pack more characters into a symbol than byte mode, which is used for everything else. QrCode chooses the most compact mode the text allows, and the response reports it. A product code written in upper case therefore gives a smaller symbol than the same code in lower case. Tcl

load ./chilkat.dll

set success 0

#  This example requires the Chilkat API to have been previously unlocked.
#  See Global Unlock Sample for sample code.

set fmt [new_CkFormats]

set json [new_CkJsonObject]

set jsonOut [new_CkJsonObject]

#  Digits only.
CkJsonObject_UpdateString $json "payload.text" "00123456789012345678"
set success [CkFormats_QrCode $fmt "generate" $json $jsonOut]
if {$success == 0} then {
    puts [CkFormats_lastErrorText $fmt]
    delete_CkFormats $fmt
    delete_CkJsonObject $json
    delete_CkJsonObject $jsonOut
    exit
}

puts "digits: mode [CkJsonObject_stringOf $jsonOut {symbols[0].selectedEncoding.mode}], version [CkJsonObject_IntOf $jsonOut {symbols[0].selectedEncoding.version}]"

#  Upper-case letters, digits, space and - are all in the alphanumeric set.
CkJsonObject_UpdateString $json "payload.text" "ORDER-12345 LOT A7 SHELF 12-C"
set success [CkFormats_QrCode $fmt "generate" $json $jsonOut]
if {$success == 0} then {
    puts [CkFormats_lastErrorText $fmt]
    delete_CkFormats $fmt
    delete_CkJsonObject $json
    delete_CkJsonObject $jsonOut
    exit
}

puts "upper case: mode [CkJsonObject_stringOf $jsonOut {symbols[0].selectedEncoding.mode}], version [CkJsonObject_IntOf $jsonOut {symbols[0].selectedEncoding.version}]"

#  Lower-case letters are not, so the same text in lower case needs byte mode.
CkJsonObject_UpdateString $json "payload.text" "order-12345 lot a7 shelf 12-c"
set success [CkFormats_QrCode $fmt "generate" $json $jsonOut]
if {$success == 0} then {
    puts [CkFormats_lastErrorText $fmt]
    delete_CkFormats $fmt
    delete_CkJsonObject $json
    delete_CkJsonObject $jsonOut
    exit
}

puts "lower case: mode [CkJsonObject_stringOf $jsonOut {symbols[0].selectedEncoding.mode}], version [CkJsonObject_IntOf $jsonOut {symbols[0].selectedEncoding.version}]"

#  The mode can be named.  Byte mode can hold any text.  Naming a mode the text cannot use
#  (numeric for text with letters, for example) fails with conflictingOptions.
CkJsonObject_UpdateString $json "payload.text" "00123456789012345678"
CkJsonObject_UpdateString $json "encoding.qr.mode" "byte"
set success [CkFormats_QrCode $fmt "generate" $json $jsonOut]
if {$success == 0} then {
    puts [CkFormats_lastErrorText $fmt]
    delete_CkFormats $fmt
    delete_CkJsonObject $json
    delete_CkJsonObject $jsonOut
    exit
}

puts "digits as bytes: mode [CkJsonObject_stringOf $jsonOut {symbols[0].selectedEncoding.mode}], version [CkJsonObject_IntOf $jsonOut {symbols[0].selectedEncoding.version}]"

#  The four symbols, in the order they were made:

#  

#  Sample output:

#  digits: mode numeric, version 1
#  upper case: mode alphanumeric, version 2
#  lower case: mode byte, version 3
#  digits as bytes: mode byte, version 2

delete_CkFormats $fmt
delete_CkJsonObject $json
delete_CkJsonObject $jsonOut