Merge branch 'pr/1985' into dev

Author: Lionel Laské

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Stickman activity
 - Add "Global Time" feature to Clock activity with timezone selection #1825
 - Add Water mode in Physics activity #1863
+- Add pen tool for freehand drawing in Physics activity #1858
 
 ### Changed
 - Rewrite of Sugarizer Core using Vue.js

activities/PhysicsJS.activity/css/activity.css

@@ -50,6 +50,11 @@ body {
     z-index: 2;
 }
 
+#main-toolbar #pen-button {
+  background-image: url(../icons/pen.svg);
+  z-index: 3;
+}
+
 /* Left water */
 #viewport.water-mode[data-water-region="left"]::after {
     content: "";

activities/PhysicsJS.activity/icons/pen.svg

@@ -29,6 +29,7 @@
   <button class="toolbutton" id="box-button" title="Box"></button>
   <button class="toolbutton" id="triangle-button" title="Triangle"></button>
   <button class="toolbutton" id="polygon-button" title="Polygon"></button>
+  <button class="toolbutton" id="pen-button" title="Drawing tool"></button>
   <button class="toolbutton" id="gravity-button" title="Gravity"></button>
   <button class="toolbutton" id="sensor-button" title="Sensor"></button>
   <button class="toolbutton" id="apple-button" title="Newton"></button>