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Code Issues Releases Wiki Activity

Update docs for makeqr macro (#8654)

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Mateusz Wilczek 2024-10-09 13:11:44 +02:00 committed by GitHub
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plugins/tiddlywiki/qrcode/docs/makeqr.tid
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@ -11,7 +11,7 @@ The ''makeqr'' [[macro|Macros]] converts text data into an image of the correspo
;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").
: 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)
@ -19,26 +19,30 @@ The conversion will fail if the text is too long and/or complex and the macro wi
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.
<<<
|errorCorrectLevel |Redundancy |Use cases |h
|L | 7%|Clean environment, large amount of data |
|M | 15%|Default value, most common choice |
|Q | 25%|Dirty environment, small amount of data |
|H | 30%|~|
!! Examples
Making a QR code for a simple string of text:
Making a QR code data URI for a simple string of text:
```
<<makeqr "Hello there!">>
```
Making a QR code for the URL field of the current tiddler:
Displaying a QR code for a simple string of text:
```
<$macrocall $name="makeqr" text={{!!url}}/>
<img src=<<makeqr "Hello there!">> />
```
Making a QR code for the URL of the current wiki:
Displaying a QR code for a transcluded value (URL of the current wiki):
```
<$macrocall $name="makeqr" text={{$:/info/url/full}}/>
\define qr(content) <img src=<<makeqr text:"""$content$""">> />
<$transclude $variable="qr" content={{$:/info/url/full}} />
```