Add debug messages

src/app/app.component.ts

@@ -602,6 +602,7 @@ export class AppComponent implements OnInit, OnDestroy, Observer {
   disableScroll(event: any) {
     if (event.srcElement.type === "number") {
         event.preventDefault();
+        // @TODO how to send event to parent so that scrolling the page works ?
     }
   }
   @HostListener("keydown", [ "$event" ]) onKeydown(event: any) {

src/app/formulaire/definition/concrete/form-pab.ts

@@ -39,5 +39,6 @@ export class FormulairePab extends FormulaireBase {
         if (pab.downWall) {
             console.log(`+ downstream wall: ${pab.downWall.uid}`);
         }
+        console.log(`>> calculating: ${pab.calculatedParam.symbol}`);
     }
 }