propagate HIDE and SHOW to nested sprite parts

history.txt

@@ -2250,3 +2250,7 @@ ______
 * updated German translation
 * Morphic: fixed #497 (prevent bubble shadows from getting cut-off)
 * Blocks: keep result-bubbles within the enclosing scripting pane
+
+140730
+------
+* Objects: propagate HIDE and SHOW to nested sprite parts

objects.js

@@ -125,7 +125,7 @@ PrototypeHatBlockMorph*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.objects = '2014-July-29';
+modules.objects = '2014-July-30';
 
 var SpriteMorph;
 var StageMorph;
@@ -2708,6 +2708,23 @@ SpriteMorph.prototype.removeClone = function () {
 
 // SpriteMorph primitives
 
+// SpriteMorph hiding and showing:
+
+/*
+    override the inherited behavior to also hide/show all
+    nested parts.
+*/
+
+SpriteMorph.prototype.hide = function () {
+    SpriteMorph.uber.hide.call(this);
+    this.parts.forEach(function (part) {part.hide(); });
+};
+
+SpriteMorph.prototype.show = function () {
+    SpriteMorph.uber.show.call(this);
+    this.parts.forEach(function (part) {part.show(); });
+};
+
 // SpriteMorph pen color
 
 SpriteMorph.prototype.setColor = function (aColor) {