diff --git a/BART.wdgt/BART.html b/BART.wdgt/BART.html
index a7c7a06..037216c 100644
--- a/BART.wdgt/BART.html
+++ b/BART.wdgt/BART.html
@@ -14,6 +14,16 @@
 
     <!-- JavaScript -->
     
+    <script>
+        window.widget = {
+        preferenceForKey: (k) => localStorage.getItem(k),
+        setPreferenceForKey: (v, k) => localStorage.setItem(k, v ?? ''),
+        openURL: (url) => window.open(url, '_blank'),
+        system: () => ({ outputString: '' }),
+        onshow: null, onhide: null, onremove: null,
+    };
+   </script>
+
     <script type='text/javascript' src='Script/MiscUtils.js' charset='utf-8'></script>
     <script type='text/javascript' src='Script/ArrayUtils.js' charset='utf-8'></script>
     <script type='text/javascript' src='Script/DateUtils.js' charset='utf-8'></script>
diff --git a/BART.wdgt/Script/BART.js b/BART.wdgt/Script/BART.js
index 07386db..92fa4e9 100644
--- a/BART.wdgt/Script/BART.js
+++ b/BART.wdgt/Script/BART.js
@@ -85,9 +85,12 @@ function Bart () {
     // to the trip list are incorrect, but it works because the the trip list only cares
     // about deltas, not absolutes.
     function getCoordsFromEvent (event) {
-        if (!event.clientX || !event.clientY) { return {} }
-        var x = event.clientX - 8;  // canvas left
-        var y = event.clientY - 31; // titlebar height
+        if (event.clientX == null || event.clientY == null) { return {} }
+        var canvas = document.getElementById("bart_map_canvas")
+        var rect = canvas.getBoundingClientRect()
+        var scale = rect.width / canvas.width  // handles CSS transform: scale()
+        var x = (event.clientX - rect.left) / scale
+        var y = (event.clientY - rect.top)  / scale
         return { x:x, y:y }
     }