[Selection] Sketch in overlay manager

src/ui/OverlayManager.js

@@ -0,0 +1,24 @@
+define(['zepto'], function ($) {
+    function OverlayManager(bodyElement) {
+        this.$body = $(bodyElement);
+    }
+
+    OverlayManager.prototype.show = function (view, x, y) {
+        var $container = $('<div></div>');
+
+        x = x || 0;
+        y = y || 0;
+
+        $container.attr('left', x + 'px');
+        $container.attr('top', y + 'px');
+
+        view.show($container[0]);
+
+        return function () {
+            $container.remove();
+            view.destroy();
+        };
+    };
+
+    return OverlayManager;
+});