This feels like something someone would have asked before, but I couldn't
find any relevant answers.
I have a usecase where my page/components have role-based security;
ENABLE/RENDER actions are dynamic as opposed to static based upon the
user/data on the page. When data on the page changes that could affect
another field, I want to refresh the other field so that it's ENABLE/RENDER
function can be re-evaluated.
In my specific example, a field in one Panel is enabled ONLY when you are in
the List of Responsible Individuals (a field on a different Panel). If that
list of RIs change, I want to immediately refresh (via AJAX) the other
(dependent) field.
I am working towards a Listerner(?) pattern whereby a Component registers
itself with another Component to be refreshed. In order for that to work, I
need to geta handle to the other Component and the only way I know to do
that is by calling get from a common parent. Other ways?
Given this hierarchy, I want to register OtherMdays to be refreshed when
ResponsibleIndividuals changes (ResponsibleIndividuals panel is responsible
for knowing when to refresh it's listeners).
content (Panel)
+ form
+ headerSection (Panel)
+ collapsibleBody (WebMarkupContainer)
+ sections (RepeatingView)
+ header (Panel)
+ responsibleIndividuals (Panel)
(other textfields, etc)
+ romEvents (RepeatingView)
+ baseEvent (Panel)
+ collapsibleBody (WebMarkupContainer)
+ sections (RepeatingView)
+ event (Panel)
+ rates (Panel)
OtherMdays (TextField)
(other textfields, etc)
+ signatures (Panel)
So, the name of the RI Panel (relative to form) is
"headerSection:collapsibleBody:sections:header:responsibleIndividuals".
Therefore, I can do
form.get("headerSection:collapsibleBody:sections:header:responsibleIndividuals")
to return that Component. But that means that everywhere that I want to get
a handle to the RI Panel, I need to use that string. Is that really the
only/best way to do it? I suppose I could extract that string into a
constant at the Page level so that at least I am not propagating a raw
string, but it is still just a plain old string, then why not store a ref to
the component at the page level? There could be many such "refreshers" that
listener Components register with.
Chuck
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