gbmusic: `Simple button` setting to disable double/triple pressing

For music players which handle multiple button presses themselves.
see http://forum.espruino.com/comments/15984222/

apps/gbmusic/ChangeLog

@@ -2,4 +2,4 @@
 0.02: Increase text brightness, improve controls, (try to) reduce memory usage
 0.03: Only auto-start if active app is a clock, auto close after 1 hour of inactivity
 0.04: Setting to disable touch controls, minor bugfix
-0.05: Remove touch controls setting, reduce fadeout flicker
+0.05: Setting to disable double/triple press control, remove touch controls setting, reduce fadeout flicker

apps/gbmusic/README.md

@@ -22,6 +22,9 @@ You can change these under `Settings`->`App/Widget Settings`->`Music Controls`.
 Automatically load the app when you play music and close when the music stops.
 (If the app opened automatically, it closes after music has been paused for 5 minutes.)
 
+**Simple button**:
+Disable double/triple pressing Button 2: always simply toggle play/pause.
+(For music players which handle multiple button presses themselves.)
 
 ## Controls
 

apps/gbmusic/app.js

@@ -485,11 +485,19 @@ function startButtonWatches() {
       tPress = setTimeout(() => {Bangle.showLauncher();}, 3000);
     }
   }, BTN2, {repeat: true, edge: "rising"});
-  setWatch(() => {
-    nPress++;
-    clearTimeout(tPress);
-    tPress = setTimeout(handleButton2Press, 500);
-  }, BTN2, {repeat: true, edge: "falling"});
+  const s = require("Storage").readJSON("gbmusic.json", 1) || {};
+  if (s.simpleButton) {
+    setWatch(() => {
+      clearTimeout(tPress);
+      togglePlay();
+    }, BTN2, {repeat: true, edge: "falling"});
+  } else {
+    setWatch(() => {
+      nPress++;
+      clearTimeout(tPress);
+      tPress = setTimeout(handleButton2Press, 500);
+    }, BTN2, {repeat: true, edge: "falling"});
+  }
 }
 function handleButton2Press() {
   tPress = null;

apps/gbmusic/settings.js

@@ -9,6 +9,7 @@
   // initialize with default settings...
   let s = {
     autoStart: true,
+    simpleButton: false,
   };
   // ...and overwrite them with any saved values
   // This way saved values are preserved if a new version adds more settings
@@ -34,6 +35,11 @@
     format: yesNo,
     onchange: save("autoStart"),
   };
+  menu[translate("Simple button")] = {
+    value: !!s.simpleButton,
+    format: yesNo,
+    onchange: save("simpleButton"),
+  };
 
   E.showMenu(menu);
 });