event-bus provides scroll and window resize events

app/app/components/document/document-sidebar.js

@@ -30,22 +30,26 @@ export default Ember.Component.extend(TooltipMixin, NotifierMixin, {
 	},
 
 	didInsertElement() {
+		let _this = this;
+        this.eventBus.subscribe('resized', this, 'positionTool');
+		this.eventBus.subscribe('scrolled', this, 'positionTool');
+	},
+
+	willDestroyElement() {
+		this.destroyTooltips();
+	},
+
+	positionTool() {
 		let s = $(".section-tool");
         let pos = s.position();
-
-		$(window).scroll(_.throttle(function() {
 		let windowpos = $(window).scrollTop();
+
 		if (windowpos - 200 >= pos.top) {
 			s.addClass("stuck-tool");
 			s.css('left', parseInt($(".zone-sidebar").css('width')) - 18 + 'px');
 		} else {
 			s.removeClass("stuck-tool");
 		}
-        }, 50));
-	},
-
-	willDestroyElement() {
-		this.destroyTooltips();
 	},
 
     actions: {

app/app/services/event-bus.js

@@ -12,6 +12,18 @@
 import Ember from 'ember';
 
 export default Ember.Service.extend(Ember.Evented, {
+	init() {
+		let _this = this;
+
+		window.addEventListener("scroll", _.debounce(function() {
+			_this.publish('scrolled', null);
+		}, 100));
+
+		window.addEventListener("resize", _.debounce(function() {
+			_this.publish('resized', null);
+		}, 100));
+	},
+
     publish: function() {
         return this.trigger.apply(this, arguments);
     },