added 'volume' and 'balance' selectors to the OF block

HISTORY.md

@@ -61,6 +61,7 @@
 * Objects, Store: renamed "pan left/right" to "balance"
 * updated German translation
 * moved "stage width" and "stage height" into attribute menu of the OF block for the stage
+* added 'volume' and 'balance' selectors to the OF block
 
 ### 2019-04-03
 * Objects, Threads: Safari compatibility tweaks (only use StereoPanner if available)

src/blocks.js

@@ -8839,12 +8839,16 @@ InputSlotMorph.prototype.attributesMenu = function () {
             'direction' : ['direction'],
             'costume #' : ['costume #'],
             'costume name' : ['costume name'],
-            'size' : ['size']
+            'size' : ['size'],
+            'volume' : ['volume'],
+            'balance' : ['balance']
         };
     } else { // the stage
         dict = {
             'costume #' : ['costume #'],
             'costume name' : ['costume name'],
+            'volume' : ['volume'],
+            'balance' : ['balance'],
             'width': ['width'],
             'height': ['height']
         };

src/threads.js

@@ -3611,6 +3611,10 @@ Process.prototype.reportAttributeOf = function (attribute, name) {
                                 : localize('Empty');
             case 'size':
                 return thatObj.getScale ? thatObj.getScale() : '';
+            case 'volume':
+                return thatObj.getVolume();
+            case 'balance':
+                return thatObj.getPan();
             case 'width':
                 this.assertType(thatObj, 'stage');
                 return thatObj.dimensions.x;