Merge pull request #3793 from czeppi/cc_astro

Add a new face clock

apps/cc_astro/ChangeLog

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+0.01: First functional release

apps/cc_astro/README.md

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+# Astronomy Clock
+
+## Features
+
+* shows earth as hour and venus as minute hand
+* shows mercury as second hand only on unlocked screen
+* you will be enabled, to recognize the time from the planet positions
+* if battery is low, the sun will become a red giant
+
+![logo](screenshot1.png)

apps/cc_astro/app.js

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+// ----- const -----
+
+const center = {
+  "x": g.getWidth()/2,
+  "y": g.getHeight()/2
+};
+
+const parameters = {
+  "earthOrbitRadius": 80,
+  "venusOrbitRadius": 60,
+  "mercuryOrbitRadius": 40,
+  "earthRadius": 6,
+  "venusRadius": 6,
+  "mercuryRadius": 4,
+  "sunRadius": 12,
+  "maxSunRadius": 115
+};
+
+// ----- global vars -----
+
+let drawTimeout;
+let queueMillis = 1000;
+let unlock = true;
+let lastBatteryStates = [E.getBattery()];
+
+// ----- functions -----
+
+function updateState() {
+  updateBatteryStates();
+
+  if (Bangle.isLCDOn()) {
+    if (!Bangle.isLocked()) {
+      queueMillis = 1000;
+      unlock = true;
+    }
+    else {
+      queueMillis = 60000;
+      unlock = false;
+    }
+    draw();
+  }
+  else {
+    if (drawTimeout)
+      clearTimeout(drawTimeout);
+    drawTimeout = undefined;
+  }
+}
+
+function updateBatteryStates() {
+  lastBatteryStates.push(E.getBattery());
+  if (lastBatteryStates.length > 5)
+    lastBatteryStates.shift();  // remove 1st item
+}
+
+function draw() {
+  drawBackground();
+  drawHands();
+  queueDraw();
+}
+
+function drawBackground() {
+  clearScreen();
+  drawSun();
+}
+
+function clearScreen() {
+  g.setBgColor(0, 0, 0);
+  g.clear();
+}
+
+function drawSun() {
+  const batteryState = calcAvgBatteryState();
+
+  if (batteryState <= 25)
+    g.setColor(1, 0, 0);  // red sun, if battery low
+  else
+    g.setColor(1, 1, 0);
+
+  let r = parameters.sunRadius;
+  if (batteryState <= 20) {
+    const relSize = (20 - batteryState) / 20;
+    const dr = parameters.maxSunRadius - parameters.sunRadius;
+    r = parameters.sunRadius + relSize * dr;
+  }
+
+  g.fillCircle(center.x, center.y, r);
+}
+
+function drawHands() {
+  const date = new Date();
+
+  drawHourHand(date.getHours(), date.getMinutes());
+  drawMinuteHand(date.getMinutes());
+
+  if (unlock) {
+    drawSecondHand(date.getSeconds());
+  }
+}
+
+function drawHourHand(hours, minutes) {
+  const r = parameters.earthOrbitRadius;
+  const phi = 30 * (hours + minutes/60) * (Math.PI / 180) - Math.PI/2;
+  const x = center.x + r * Math.cos(phi);
+  const y = center.y + r * Math.sin(phi);
+
+  g.setColor(1, 1, 1);
+  g.drawCircle(center.x, center.y, r);
+
+  g.setColor(0, 1, 1);
+  g.fillCircle(x, y, parameters.earthRadius);
+}
+
+function drawMinuteHand(minutes) {
+  const r = parameters.venusOrbitRadius;
+  const phi = 6 * minutes * (Math.PI / 180) - Math.PI/2;
+  const x = center.x + r * Math.cos(phi);
+  const y = center.y + r * Math.sin(phi);
+
+  g.setColor(1, 1, 1);
+  g.drawCircle(center.x, center.y, r);
+
+  g.setColor(1, 1, 1);
+  g.fillCircle(x, y, parameters.venusRadius);
+}
+
+function drawSecondHand(seconds) {
+  const r = parameters.mercuryOrbitRadius;
+  const phi = 6 * seconds * (Math.PI / 180) - Math.PI/2;
+  const x = center.x + r * Math.cos(phi);
+  const y = center.y + r * Math.sin(phi);
+
+  g.setColor(1, 1, 1);
+  g.drawCircle(center.x, center.y, r);
+
+  g.setColor(1, 0, 1);
+  g.fillCircle(x, y, parameters.mercuryRadius);
+}
+
+function calcAvgBatteryState() {
+  const n = lastBatteryStates.length;
+  if (n == 0)
+    return 100;
+
+  let sum = lastBatteryStates.reduce((acc, value) => acc + value, 0);
+  return Math.round(sum / n);
+}
+
+function queueDraw() {
+  if (drawTimeout) 
+    clearTimeout(drawTimeout);
+
+  drawTimeout = setTimeout(function() {
+    drawTimeout = undefined;
+    draw();
+  }, queueMillis - (Date.now() % queueMillis));
+}
+
+
+//// main running sequence ////
+
+// Show launcher when middle button pressed, and widgets that we're clock
+Bangle.setUI({
+  mode: "clock",
+  remove: function() {
+    Bangle.removeListener('lcdPower', updateState);
+    Bangle.removeListener('lock', updateState);
+    Bangle.removeListener('charging', draw);
+
+    // We clear drawTimout after removing all listeners, because they can add one again
+    if (drawTimeout)
+      clearTimeout(drawTimeout);
+
+    drawTimeout = undefined;
+    require("widget_utils").show();
+  }
+});
+
+// Stop updates when LCD is off, restart when on
+Bangle.on('lcdPower', updateState);
+Bangle.on('lock', updateState);
+Bangle.on('charging', draw); // Immediately redraw when charger (dis)connected
+
+updateState();
+draw();

apps/cc_astro/app_icon.js

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+require("heatshrink").decompress(atob("mEwxH+If4AxlYALFkQOaFqITlDQ5FpJDgZUCY2s1mBeJB5bCI1W64ABDhAyKGB4PHwIvCRSgwNCw4HBwOBqxJVGBguHdrTOSCJLtMGA4QXFgYAFJywuPayIgTUyIwWFzIcPCTBhQAogLFAowuVJqRecEiQKQAAUqv1+qhgSAhQvMqnSAAWoF7iOMFwYABMI1KpQvflQvFvwMEku53MlF/6PVlS/GFwYqVd5heFd6wvNSQQABBQ4vaGBQAIlYkVF7IFiFyCuMFJgwORopMOGDIuHEJkHjkjjkHHpQxIBJBeNisjAAMcLJYnBAArDTAAReBAATsUFykAhwuCirsTFyowCisVCg4xQYZwWRC5jDQDKbpGeJapSLBYqDB5rYaDCQZWIyxHYDaaXMGKjHOFrjtKeRwA/AE4A="))

apps/cc_astro/metadata.json

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+{ "id": "cc_astro",
+  "name": "CC Astro",
+  "shortName": "CC-Astro",
+  "version": "0.01",
+  "description": "A clock with planets as clock hands",
+  "icon": "app_icon.png",
+  "type": "clock",
+  "tags": "clock,astro,planets,earth,venus,mercury,sun",
+  "supports" : ["BANGLEJS2"],
+  "screenshots": [
+    {"url":"screenshot1.png"}, 
+    {"url":"screenshot2.png"}, 
+    {"url":"screenshot3.png"}
+  ],
+  "readme": "README.md",
+  "storage": [
+    {"name": "cc_astro.app.js", "url": "app.js"},
+    {"name": "cc_astro.img", "url": "app_icon.js", "evaluate":true}
+  ],
+  "data": [{"name":"cc_astro.json"}]
+}