mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-12-04 23:39:57 +00:00
45 lines
1.5 KiB
Plaintext
45 lines
1.5 KiB
Plaintext
title: $:/plugins/tiddlywiki/qrcode/docs/qrcode
|
|
tags: $:/tags/QRCodeDocs
|
|
caption: makeqr Macro
|
|
|
|
The ''makeqr'' [[macro|Macros]] converts text data into an image of the corresponding QR code. The image is returned as [[base64-encoded data URI|https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs]].
|
|
|
|
!! Parameters
|
|
|
|
;text
|
|
: The text to encode
|
|
;size
|
|
: The size of the image in pixels (defaults to 500)
|
|
;errorCorrectLevel
|
|
: Determines the amount of error correction applied to the image; see below (defaults to "M").
|
|
;fallback
|
|
: The fallback image to be returned in case of an error (see below)
|
|
|
|
The conversion will fail if the text is too long and/or complex and the macro will return the provided fallback image. If no fallback image is provided then an error image is generated.
|
|
|
|
The error correction level is a [[QR code feature|http://www.qrcode.com/en/about/error_correction.html]]:
|
|
|
|
<<<
|
|
QR Code has error correction capability to restore data if the code is dirty or damaged. ... Level Q or H may be selected for factory environment where QR Code get dirty, whereas Level L may be selected for clean environment with the large amount of data. Typically, Level M (15%) is most frequently selected.
|
|
<<<
|
|
|
|
!! Examples
|
|
|
|
Making a QR code for a simple string of text:
|
|
|
|
```
|
|
<<makeqr "Hello there!">>
|
|
```
|
|
|
|
Making a QR code for the URL field of the current tiddler:
|
|
|
|
```
|
|
<$macrocall $name="makeqr" text={{!!url}}/>
|
|
```
|
|
|
|
Making a QR code for the URL of the current wiki:
|
|
|
|
```
|
|
<$macrocall $name="makeqr" text={{$:/info/url/full}}/>
|
|
```
|