andark: queue redraws and enable fastload

apps/andark/ChangeLog

@@ -5,3 +5,4 @@
 0.05: Fix support for dark theme + support widgets +
       add settings for widgets, order of drawing and hour hand length
 0.06: Fix issue showing widgets when app is fast-loaded into from launcher with widgets disabled
+0.07: Enable fast loading and queue updates to the second

apps/andark/app.js

@@ -1,3 +1,4 @@
+{
 const defaultSettings = {
   loadWidgets    : false,
   textAboveHands : false,
@@ -25,18 +26,16 @@ const zahlpos=(function() {
   return z;
 })();
 
-let unlock = false;
 
-function zeiger(len,dia,tim){
+let zeiger = function(len,dia,tim){
   const x=c.x+ Math.cos(tim)*len/2,
         y=c.y + Math.sin(tim)*len/2,
         d={"d":3,"x":dia/2*Math.cos(tim+Math.PI/2),"y":dia/2*Math.sin(tim+Math.PI/2)},
         pol=[c.x-d.x,c.y-d.y,c.x+d.x,c.y+d.y,x+d.x,y+d.y,x-d.x,y-d.y];
   return pol;
+};
 
-}
-
-function drawHands(d) {
+let drawHands = function(d) {
   let m=d.getMinutes(), h=d.getHours(), s=d.getSeconds();
   g.setColor(1,1,1);
 
@@ -61,9 +60,9 @@ function drawHands(d) {
     g.fillPoly(sekz,true);
   }
   g.fillCircle(c.x,c.y,4);
-}
+};
 
-function drawText(d) {
+let drawText = function(d) {
   g.setFont("Vector",10);
   g.setBgColor(0,0,0);
   g.setColor(1,1,1);
@@ -74,19 +73,30 @@ function drawText(d) {
     g.setBgColor(1,0,0);
   }
   g.drawString(batStr, c.x, c.y+40, true);
-}
+};
 
-function drawNumbers() {
+let drawNumbers = function() {
   //draws the numbers on the screen
   g.setFont("Vector",20);
   g.setColor(1,1,1);
   g.setBgColor(0,0,0);
   for(let i = 0;i<12;i++){
      g.drawString(zahlpos[i][0],zahlpos[i][1],zahlpos[i][2],true);
   }
-}
+};
+
+let drawTimeout;
+let queueMillis = 1000;
 
-function draw(){
+let queueDraw = function() {
+  if (drawTimeout) clearTimeout(drawTimeout);
+  drawTimeout = setTimeout(function() {
+    drawTimeout = undefined;
+    draw();
+  }, queueMillis - (Date.now() % queueMillis));
+};
+
+let draw = function(){
   // draw black rectangle in the middle to clear screen from scale and hands
   g.setColor(0,0,0);
   g.fillRect(10,10,2*c.x-10,2*c.x-10);
@@ -100,10 +110,11 @@ function draw(){
   } else {
     drawText(d); drawHands(d);
   }
-}
+  queueDraw();
+};
 
 //draws the scale once the app is startet
-function drawScale(){
+let drawScale = function(){
   // clear the screen
   g.setBgColor(0,0,0);
   g.clear();
@@ -117,36 +128,49 @@ function drawScale(){
     g.fillRect(10,10,2*c.x-10,2*c.x-10);
     g.setColor(1,1,1);
   }
-}
+};
 
 //// main running sequence ////
 
 // Show launcher when middle button pressed, and widgets that we're clock
-Bangle.setUI("clock");
+Bangle.setUI({
+  mode: "clock",
+  remove: function() {
+    if (drawTimeout) clearTimeout(drawTimeout);
+    drawTimeout = undefined;
+    Bangle.removeListener('lcdPower', updateState);
+    Bangle.removeListener('lock', updateState);
+    require("widget_utils").show();
+}});
 // Load widgets if needed, and make them show swipeable
 if (settings.loadWidgets) {
   Bangle.loadWidgets();
   require("widget_utils").swipeOn();
 } else if (global.WIDGETS) require("widget_utils").hide();
-// Clear the screen once, at startup
-drawScale();
-draw();
 
-let secondInterval = setInterval(draw, 1000);
+let updateState = function() {
+   if (Bangle.isLCDOn()) {
+     if (!Bangle.isLocked()) {
+       queueMillis = 1000;
+       unlock = true;
+     } else {
+       queueMillis = 60000;
+       unlock = false;
+   }
+     draw();
+   } else {
+    if (drawTimeout) clearTimeout(drawTimeout);
+    drawTimeout = undefined;
+   }
+};
 
 // Stop updates when LCD is off, restart when on
-Bangle.on('lcdPower',on=>{
-  if (secondInterval) clearInterval(secondInterval);
-  secondInterval = undefined;
-  if (on) {
-    secondInterval = setInterval(draw, 1000);
-    draw(); // draw immediately
-  }
-});
-Bangle.on('lock',on=>{
-  unlock = !on;
-  if (secondInterval) clearInterval(secondInterval);
-  secondInterval = setInterval(draw, unlock ? 1000 : 60000);
-  draw(); // draw immediately
-});
-Bangle.on('charging',on=>{draw();});
+Bangle.on('lcdPower', updateState);
+
+Bangle.on('lock', updateState);
+
+let unlock = true;
+updateState();
+drawScale();
+draw();
+}

apps/andark/metadata.json

@@ -1,7 +1,7 @@
 { "id": "andark",
   "name": "Analog Dark",
   "shortName":"AnDark",
-  "version":"0.06",
+  "version":"0.07",
   "description": "analog clock face without disturbing widgets",
   "icon": "andark_icon.png",
   "type": "clock",