Usually, activating a trigger or submit button on the client doesn't prevent further actions in the user interface. Sometimes however it is useful to block such actions until further processing is complete, for example calling a submission that saves a document.
You can obtain this behavior by using the
xxforms:modal="true" attribute on
<xforms:trigger> and
<xforms:submit>:
<xforms:trigger xxforms:modal="true">
<xforms:label>Save</xforms:label>
<xforms:send ev:event="DOMActivate" submission="save-submission"/>
</xforms:trigger>
With this attribute set to true, user input is blocked until all the events triggered by
DOMActivate are processed. In the meanwhile, the page is grayed out and an icon appears indicating that background processing is taking place.
As soon as users activate (press enter or click) on a modal trigger or submit, the corresponding button looses the focus. This prevents users from being able to press enter and thus activate a button which still has the focus, while screen is grayed out.
