Dear Celtikers: (or how do we call Celtk users ;-)

In the quest of generating a dynamic GUI for my sweet little app I encountered the need to separate widget instance creation from making them actually appear... Celtk does handle widget appearance as a side effekt of creating an instance - at least I understand the Celtk mechanism as such.

Now there's a couple of solutions of that I can imagine - each requiring a change to deeper Celtk mechanisms like adding a new slot "visiblep" to the widget class and then preventing placing, packing, and/or gridding when that slot is nil ... Too much low level stuff - I wonder if there's another solution ?!

I have:

(defmodel tibrv-console (window) ((active-workarea :accessor active-workarea :initform (c-in nil) :initarg :active-workarea) (workareas :accessor workareas :initform (c-in nil) :initarg :workareas)) (:default-initargs :id :tibrv-console :title$ (conc$ "*** G&C::TIBCO Rendezvous Console - " *tibrv- console-version* " ***") :width (c-in 800) :height (c-in 605) :workareas (c? (the-kids (make-kid 'msg-workarea) ;; These two families should not (make-kid 'listener- workarea))) ;; appear upon creation :kids (c? (the-kids (main-menubar) (application-view self) (header-view self) (tool-header-view self) ))))

(defmodel workarea (tibrv-model ctk::frame) ((visiblep :accessor visiblep :initform (c- in :unplaced) :initarg :visiblep) (title :accessor title :initform (c-in nil) :initarg :title) (required-field-color :accessor required-field-color :initform (c-in nil) :initarg :required-field-color)) (:default-initargs :id (gensym "WORKAREA-") :required-field-color (c-in "#f0d5da")))

(defobserver visiblep ((self workarea)) (if (or (not new-value) (eql new-value :unplaced)) (hide self) (unhide self)))

(defmethod hide (self) (when self (dolist (kid (kids self)) (when kid (hide kid))) (when (eql (type-of self) 'ctk::widget) (tk-format '(:fini self) "place forget ~a" (path self))) (tk-format '(:fini self) "update idletasks")))

(defmethod unhide (self) (when (and self (eql (type-of self) 'ctk::widget)) (tk-format '(:fini self) "place configure ~a -x ~a -y ~a" (^path) (ctk::^parent-x) (ctk::^parent-y)) (dolist (kid (kids self)) (when kid (unhide kid))) (tk-format '(:fini self) "update idletasks")))

Hiding and unhiding works OK when called directly for a workarea object.. So that part is solved already...

Any ideas really appreciated.

Frank