refactor: remove NgParam.unit member

refs #501

src/app/formulaire/elements/ngparam.ts

@@ -32,8 +32,6 @@ export class NgParameter extends InputField implements Observer {
     /** set to true to disable UI validation on this input */
     private _allowEmpty = false;
 
-    public unit: string;
-
     public radioConfig: ParamRadioConfig;
 
     public disabled: boolean;
@@ -207,6 +205,10 @@ export class NgParameter extends InputField implements Observer {
         return this._paramDef.valueMode;
     }
 
+    public get unit() {
+        return this._paramDef.unit;
+    }
+
     /**
      * Unlinks the parameter and updates its value when value mode changes
      */
@@ -496,7 +498,7 @@ export class NgParameter extends InputField implements Observer {
         if (this._paramDef.symbol === rep.prmDef.symbol) {
             this._paramDef.loadObjectRepresentation(rep.prmDef);
             this._allowEmpty = rep.allowEmpty;
-            this.unit = rep.unit;
+            this._paramDef.setUnit(rep.unit);
             this.radioConfig = rep.radioConfig;
         }
     }
@@ -581,7 +583,6 @@ export class NgParameter extends InputField implements Observer {
         if (json["allowEmpty"] !== undefined && typeof json["allowEmpty"] === "boolean") {
             this._allowEmpty = json["allowEmpty"];
         }
-        this.unit = this.paramDefinition.unit;
         this.radioConfig = this.getRadioConfig();
         if (json["calculable"] !== undefined && json["calculable"] === false) {
             this.radioConfig = Math.min(ParamCalculability.FREE, this.getRadioConfig());