added function in constructor Transitions

Author: panManfredini

build/stateElement.js

@@ -56,6 +56,11 @@ class BaseState {
  * states are always well defined, it guarantees that UI updates are made at transition completion (final state) only.
  */
 export class StateTransition extends BaseState {
+    constructor(NAME, func) {
+        super(NAME);
+        if (typeof func === "function")
+            this.usrDefined_transition = func;
+    }
     /**
      * User defined transition to be overwritten.
      * @param input Any meaningfull data.

src/stateElement.ts

@@ -60,12 +60,19 @@ class BaseState{
 
 }
 
+
+type usrCallback = (input?: any) => void;
+
 /**
  * A stateTransition is a global function that is meant to apply simultaneously an overall state change, 
  * this can be made of just one variable change or multiple stateVariables changes at the same time, so that the initial and final
  * states are always well defined, it guarantees that UI updates are made at transition completion (final state) only.
  */
 export class StateTransition extends BaseState{
+    constructor(NAME:string,func?:usrCallback){
+        super(NAME);
+        if(typeof func === "function") this.usrDefined_transition = func;
+    }
     /**
      * User defined transition to be overwritten.
      * @param input Any meaningfull data.

test/stateTransition.test.js

@@ -6,6 +6,7 @@ export default function (){
 
     let counter_st = 0;
     let counter_gb = 0;
+    let counter_st_init = 0; 
 
     describe('Transition',()=>{
 
@@ -14,6 +15,11 @@ export default function (){
         let mess = new Message("pollo");
         let message = "ciao";
 
+        let st_init = new StateTransition("test",(i)=>{
+            if(i) counter_st_init=i;
+            else counter_st_init++;
+        });
+
 
         let test_target = document.createElement("h1");
         let test_target2 = document.createElement("h2");
@@ -103,6 +109,11 @@ export default function (){
             chai.assert.Throw(func, "Forbidden multiple-update during an update callback loop");
             chai.assert.Throw(func2, "Target is undefined");
 
+            st_init.applyTransition();
+            chai.assert.equal(counter_st_init, 1, "standalone init ok");
+            st_init.applyTransition(7);
+            chai.assert.equal(counter_st_init, 7, "standalone init ok 2");
+
         });
         it('Detaches',()=>{