After a bit of messing around I got this working by adding class="cq-dialog-checkbox-enabledisable" to my sling:resourceType="granite/ui/components/foundation/form/checkbox" and class="cq-dialog-checkbox-enabledisable-target" to the sling:resourceType="granite/ui/components/foundation/form/textarea" that I wanted to disable in my cq:dialog.xml.
I then created my own clientLib that has dependencies on granite.jquery and categories cq.authoring.dialog.
UPDATE: turns out the disabled property can't be set programatically on pathbrowser field types at the top level, so you neeed to disable the child fields contained inside it (js-coral-pathbrowser-input and js-coral-pathbrowser-button) code snippet below updated to reflect this.
/**
* Extension to the standard checkbox component. It enables/disables other components based on the
* selection made in the checkbox.
*
* How to use:
*
* - add the class cq-dialog-checkbox-enabledisable to the checkbox element
* - add the class cq-dialog-checkbox-enabledisable-target to each target component that can be enabled/disabled
*/
(function(document, $) {
"use strict";
// when dialog gets injected
$(document).on("foundation-contentloaded", function(e) {
// if there is already an inital value make sure the according target element becomes visible
enableDisable($(".cq-dialog-checkbox-enabledisable", e.target));
});
$(document).on("change", ".cq-dialog-checkbox-enabledisable", function(e) {
enableDisable($(this));
});
function enableDisable(el){
el.each(function(i, element) {
if ($(element).attr("type") === "checkbox"){
if ($(element).prop('checked')){
$('.cq-dialog-checkbox-enabledisable-target').enable();
} else {
$('.cq-dialog-checkbox-enabledisable-target').disable();
}
}
})
}
//recurse all pathbrowser children and grandchildren etc
function iteratePathBrowserDescendants (node, enable) {
for (var i = 0; i < node.childNodes.length; i++) {
var child = node.childNodes[i];
if ((child.className.indexOf('js-coral-pathbrowser-input') > -1 ) || (child.className.indexOf('js-coral-pathbrowser-button') > -1 )) {
enablePathBrowser(child, enable);
} else {
iteratePathBrowserDescendants(child, enable);
}
}
}
function enablePathBrowser(node, enable) {
node.disabled = enable;
}
//iterate class cq-dialog-checkbox-enabledisable-target's and enable
$.prototype.enable = function () {
$.each(this, function (index, el) {
//special treatment for pathBrowser as it is made up of multiple fields and cannot be disabled at the top level
if (el.hasAttribute('data-init')) {
if (el.getAttribute('data-init') == 'pathbrowser'){
iteratePathBrowserDescendants(el, false);
};
} else {
el.disabled = false;
}
});
}
//iterate class cq-dialog-checkbox-enabledisable-target's and disable
$.prototype.disable = function () {
$.each(this, function (index, el) {
//special treatment for pathBrowser as it is made up of multiple fields and cannot be disabled at the top level
if (el.hasAttribute('data-init')) {
if (el.getAttribute('data-init') == 'pathbrowser'){
iteratePathBrowserDescendants(el, true);
};
} else {
el.disabled = true;
}
});
}
})(document,Granite.$);