Minimal example dialog:
I believe this is the cleanest solution. Doing this you don't need to change your buttons code. This solution overrides the hide function prototype.
$(document).ready(function() {
PrimeFaces.widget.Dialog.prototype.originalHide = PrimeFaces.widget.Dialog.prototype.hide; // keep a reference to the original hide()
PrimeFaces.widget.Dialog.prototype.hide = function() {
var ajaxResponseArgs = arguments.callee.caller.arguments[2]; // accesses oncomplete arguments
if (ajaxResponseArgs && ajaxResponseArgs.validationFailed) {
return; // on validation error, prevent closing
}
this.originalHide();
};
});
This way, you can keep your code like: