Update mosaic clock for fast load and widget_utils

apps/mosaic/ChangeLog

@@ -1,2 +1,3 @@
 0.01: First release
 0.02: Use locale time
+0.03: Change for fast loading, use widget_utils to hide widgets 

apps/mosaic/README.md

@@ -4,7 +4,7 @@ A fabulously colourful clock!
 
 * Clearly shows the time on a colourful background that changes every minute.
 * Dark and Light theme compatible, with a setting to override the digit colour scheme.
-* Show or hide widgets with a setting (default shows widgets).
+* Show or hide widgets with a setting (default hides widgets, swipe down to show them thanks to `widget_utils`).
 
 ![](mosaic-scr1.png)
 ![](mosaic-scr2.png)

apps/mosaic/metadata.json

@@ -2,7 +2,7 @@
     "id":"mosaic",
     "name":"Mosaic Clock",
     "shortName": "Mosaic Clock",
-    "version": "0.02",
+    "version": "0.03",
     "description": "A fabulously colourful clock",
     "readme": "README.md",
     "icon":"mosaic.png",

apps/mosaic/mosaic.app.js

@@ -2,6 +2,7 @@ Array.prototype.sample = function(){
   return this[Math.floor(Math.random()*this.length)];
 };
 
+{
 const SETTINGS_FILE = "mosaic.settings.json";
 let settings;
 let theme;
@@ -87,8 +88,6 @@ let o_h = Math.floor((g.getHeight() - num_squares_h * s+offset_widgets)/2);
 let mid_x = Math.floor(num_squares_w/2);
 let mid_y = Math.floor((num_squares_h-1)/2);
 
-draw();
-
 Bangle.on('lcdPower',on=>{
   if (on) {
     draw(); // draw immediately, queue redraw
@@ -98,8 +97,23 @@ Bangle.on('lcdPower',on=>{
   }
 });
 
-Bangle.setUI('clock');
+Bangle.setUI({
+  mode : 'clock',
+  remove : function() {
+    // Called to unload all of the clock app
+    if (drawTimeout) clearTimeout(drawTimeout);
+    drawTimeout = undefined;
+    delete Array.prototype.sample;
+    require('widget_utils').show(); // re-show widgets
+  }
+});
+
+Bangle.loadWidgets();
 if (settings.showWidgets) {
-  Bangle.loadWidgets();
   Bangle.drawWidgets();
+} else {
+  require("widget_utils").swipeOn(); // hide widgets, make them visible with a swipe
+}
+
+draw();
 }