voldisp: some optimization

Hopefully. And also, probably not needed...

Author: thyttan

apps/voldisp/boot.js

@@ -1,37 +1,37 @@
 {
+  const WIDGET_UTILS_HIDE = function() {
+    //exports.cleanup();
+    if (!global.WIDGETS) return;
+    g.reset(); // reset colors
+    for (var w of global.WIDGETS) {
+      if (w._draw) return; // already hidden
+      w._draw = w.draw;
+      w.draw = () => {};
+      w._area = w.area;
+      w.area = "";
+      if (w.x!=undefined) g.clearRect(w.x,w.y,w.x+w.width-1,w.y+23);
+    }
+  };
+  /// Show any hidden widgets
+  const WIDGET_UTILS_SHOW = function() {
+    //exports.cleanup();
+    if (!global.WIDGETS) return;
+    for (var w of global.WIDGETS) {
+      if (!w._draw) return; // not hidden
+      w.draw = w._draw;
+      w.area = w._area;
+      delete w._draw;
+      delete w._area;
+      w.draw(w);
+    }
+  };
+
   let timeout;
   let onMusicVolume = (volPercent)=>{
-    if (timeout) {clearTimeout(timeout); timeout=undefined;}
+    if (timeout) {clearTimeout(timeout);}
 
     if (Bangle.CLOCK) {
 
-      const WIDGET_UTILS_HIDE = function() {
-        //exports.cleanup();
-        if (!global.WIDGETS) return;
-        g.reset(); // reset colors
-        for (var w of global.WIDGETS) {
-          if (w._draw) return; // already hidden
-          w._draw = w.draw;
-          w.draw = () => {};
-          w._area = w.area;
-          w.area = "";
-          if (w.x!=undefined) g.clearRect(w.x,w.y,w.x+w.width-1,w.y+23);
-        }
-      };
-      /// Show any hidden widgets
-      const WIDGET_UTILS_SHOW = function() {
-        //exports.cleanup();
-        if (!global.WIDGETS) return;
-        for (var w of global.WIDGETS) {
-          if (!w._draw) return; // not hidden
-          w.draw = w._draw;
-          w.area = w._area;
-          delete w._draw;
-          delete w._area;
-          w.draw(w);
-        }
-      };
-
       let isAllWidgetsHidden = true;
       if (global.WIDGETS) {
         for (var w of global.WIDGETS) {
@@ -41,7 +41,7 @@
           }
         }
       }
-      WIDGET_UTILS_HIDE();
+      if (!timeout) {WIDGET_UTILS_HIDE();}
       let barWidth = g.getWidth()*volPercent/100;
       g.
         setColor(0x0000).fillRect(0,0,g.getWidth(),24).
@@ -58,6 +58,7 @@
         } else {
           Bangle.load();
         }
+        timeout = undefined;
       };
       timeout = setTimeout(goAway, 3*1000);
     }