Add a Help Button and Help Topic
For custom Wires blocks that require more than simple tooltips for user assistance, you can also create an HTML page as a help topic and add this to the block properties form using the macro metadata element <help> within <block>. This adds a ? button to the properties form.
The button opens your help topic (HTML page) in a new window that is 550px wide, by default, but can be resized.
How you handle CSS and images for help topics depends on how this HTML page will be accessed:
Absolute URLs: the help topic HTML page, along with any CSS stylesheets and images must be hosted in a web server or application server that is accessible to the
Presto Server. There are no special requirements for links to CSS or images.
Relative URLs: the help topic HTML page and
any images should be uploaded to
Presto by a
Presto administrator. You may also upload CSS stylesheets or simply define all classes in an internal <style> tag in the <head> element of the help topic HTML page.
With relative URLs, you refer to CSS or images using a URL in the form /presto/files/path/filename-assigned using the path and filename assigned in Presto.
Create the HTML page for the help topic and either:
Deploy it, with any required resources in an appropriate web server or application server that accessible to the
Presto Server.
Upload it, with any required resources, to
Presto.
Then add a URL to <help> in <block>:
This example shows an absolute URL. If you have uploaded the help topic to Presto, use a URL in the form /presto/files/path/help-topic-name.
