Adding disassembler to CPU window

app/toolkit/Window.js

@@ -5,7 +5,11 @@ Toolkit.Window = class Window extends Toolkit.Panel {
 
     // Object constructor
     constructor(application, options) {
-        super(application, options);
+        super(application, options ? {
+            height : options.height,
+            visible: true,
+            width  : options.width
+        } : {});
         options = options || {};
 
         // Configure instance fields
@@ -15,15 +19,17 @@ Toolkit.Window = class Window extends Toolkit.Panel {
         this.dragCursor     = { x: 0, y: 0 };
         this.dragEdge       = null;
         this.dragPointer    = null;
-        this.initialCenter  = "center" in options ? !!options.center : false;
         this.lastFocus      = this.element;
-        this.shown          = this.visible;
+        this.shown          = "visible" in options ? !!options.visible : true;
+        this.visible        = this.shown;
 
         // Configure element
         this.setLayout("grid", { columns: "auto" });
         this.setRole("dialog");
         this.setLocation(0, 0);
         this.element.style.position = "absolute";
+        if (!this.shown)
+            this.element.style.visibility = "hidden";
         this.element.setAttribute("aria-modal", "false");
         this.element.setAttribute("focus"     , "false");
         this.element.setAttribute("tabindex"  , "0"    );
@@ -90,6 +96,13 @@ Toolkit.Window = class Window extends Toolkit.Panel {
             this.closeListeners.push(listener);
     }
 
+    // Request focus on the appropriate element
+    focus() {
+        if (this.lastFocus != this)
+            this.lastFocus.focus();
+        else this.element.focus();
+    }
+
     // Retrieve the window's title text
     getTitle() {
         return this.title.getText();
@@ -107,11 +120,15 @@ Toolkit.Window = class Window extends Toolkit.Panel {
 
     // Specify whether the component is visible
     setVisible(visible, focus) {
-        super.setVisible(visible);
+        this.visible = visible = !!visible;
+        if (!visible) {
+            this.element.style.visibility = "hidden";
+            return;
+        }
+        this.element.style.removeProperty("visibility");
         if (this.client === undefined)
             return;
-        if (visible)
-            this.contain();
+        this.contain();
         if (focus)
             this.focus();
         if (!this.shown)
@@ -126,17 +143,6 @@ Toolkit.Window = class Window extends Toolkit.Panel {
 
 
 
-    ///////////////////////////// Package Methods /////////////////////////////
-
-    // Request focus on the appropriate element
-    focus() {
-        if (this.lastFocus != this)
-            this.lastFocus.focus();
-        else this.element.focus();
-    }
-
-
-
     ///////////////////////////// Private Methods /////////////////////////////
 
     // Position the window in the center of the desktop