Image attachment

What it does
This component represents an attachment to a form which has to contain an image. The image is displayed by the component when attached.
Accepted mediatypes
By default the component accepts image/* mediatypes.
[SINCE Orbeon Forms 2017.1]
If an upload-mediatypes custom constraint is present and not blank, it is used applied to the enclosed upload control. If missing, the default is image/*.
Events
[SINCE Orbeon Forms 2017.1]
This component dispatches the following events following the enclosed upload control:
xxforms-upload-start
xxforms-upload-cancel
xxforms-upload-done
xxforms-upload-error
Image transformation
[SINCE Orbeon Forms 2022.1]
The component can transform the uploaded image. The following attributes control the transformation:
transform-max-width:
no attribute: use the default (form-level then property)
blank attribute value: don't constrain the image width
positive integer: scale the image width to the given value if the image is larger
the image's aspect ratio is preserved when used in conjunction with transform-max-height
transform-max-height:
no attribute: use the default (form-level then property)
blank attribute value: don't constrain the image width
positive integer: scale the image hight to the given value if the image is larger
the image's aspect ratio is preserved when used in conjunction with transform-max-width
transform-format:
no attribute: use the default (form-level then property)
blank attribute value: preserve the input format
jpg: force the result to JPEG
png: force the result to PNG
transform-quality:
no attribute: use the default (form-level then property)
blank attribute value: use the default compression quality (80)
for JPEG compression only
value between 1 (worst) and 100 (best), but typically between 50 and 90
The following matching properties allow setting global defaults. For example:
<property 
    as="xs:string"
    name="oxf.xforms.xbl.fr.image-attachment.transform-max-width.*.*"
    value="1024"/>
<property 
    as="xs:string"
    name="oxf.xforms.xbl.fr.image-attachment.transform-max-height.*.*"
    value="768"/>
<property 
    as="xs:string"
    name="oxf.xforms.xbl.fr.image-attachment.transform-format.*.*"
    value="jpg"/>
<property 
    as="xs:string"
    name="oxf.xforms.xbl.fr.image-attachment.transform-quality.*.*"
    value="90"/>
Form Builder customer settings
When used in Form Builder, the following custom settings for image transformation are available:
Custom settings
See also
​Image component​
​Attachment component​

Image annotation

Number

Last modified 1yr ago