From a0040525d83cb6a80cc298e417dd13420f2a828f Mon Sep 17 00:00:00 2001
From: Richard Hopkins <hopkira@googlemail.com>
Date: Sun, 10 May 2020 19:34:46 +0100
Subject: [PATCH] Gallifreyan Wrist Watch

---
 apps/gallifrey/app.js | 200 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 200 insertions(+)
 create mode 100644 apps/gallifrey/app.js

diff --git a/apps/gallifrey/app.js b/apps/gallifrey/app.js
new file mode 100644
index 000000000..ebac920f6
--- /dev/null
+++ b/apps/gallifrey/app.js
@@ -0,0 +1,200 @@
+const locale = require('locale');
+const widgetHeight=24;
+let timer = null;
+let currentDate = new Date();
+const centerX = Math.round(g.getWidth() / 2);
+const centerY = widgetHeight + Math.round((g.getHeight()-widgetHeight) / 2);
+const radius = Math.round(Math.min(g.getWidth()/2,(g.getHeight()-widgetHeight) / 2));
+const cirRad = 2*Math.PI;
+const proportion = 0.3; // relative size of hour hand
+const thickness = 4; // thickness of decorative lines
+
+const drawSegment = (params) => {
+  angle1 = params.start/360*cirRad;
+  angle2 = (params.start + params.arc)/360*cirRad;
+  segRadius = Math.round(params.radius*radius);
+  x = centerX + (params.x * radius);
+  y = centerY - (params.y *radius);
+  g.setColor(0,0,0);
+  incr = cirRad/60;
+  for (i = angle1; i < angle2; i=i+incr) {
+    brush = thickness * (angle2-angle1) /angle2;
+    points = [
+    x + Math.sin(i) * (segRadius+brush),
+    y - Math.cos(i) * (segRadius+brush),
+    x + Math.sin(i+incr) * (segRadius+brush),
+    y - Math.cos(i+incr) * (segRadius+brush),
+    x + Math.sin(i+incr) * (segRadius-brush),
+    y - Math.cos(i+incr) * (segRadius-brush),
+    x + Math.sin(i) * (segRadius-brush),
+    y - Math.cos(i) * (segRadius-brush)
+    ];
+    g.fillPoly(points);
+  }
+};
+
+const drawThickLine = (params) => {
+  g.setColor(0,0,0);
+  from = {
+    x: centerX + (params.fromX * radius),
+    y: centerY - (params.fromY * radius)
+  };
+  to = {
+    x: centerX + (params.toX * radius),
+    y: centerY - (params.toY * radius)
+  };
+  vec = {};
+  vec.x = to.x - from.x;
+  vec.y = to.y - from.y;
+  pVec = {};
+  pVec.x = vec.y;
+  pVec.y = -vec.x;
+  length = Math.sqrt(pVec.x * pVec.x + pVec.y * pVec.y);
+  nVec = {};
+  nVec.x = pVec.x / length;
+  nVec.y = pVec.y / length;
+  array = [
+    from.x + nVec.x * thickness,
+    from.y + nVec.y * thickness,
+    from.x - nVec.x * thickness,
+    from.y - nVec.y * thickness,
+    to.x + nVec.x * thickness,
+    to.y + nVec.y * thickness,
+    to.x - nVec.x * thickness,
+    to.y - nVec.y * thickness
+  ];
+  g.fillPoly(array);
+};
+
+
+
+const drawHands = () => {
+  drawMinuteHand();
+  drawHourHand();
+  drawDecoration();
+};
+
+const drawDecoration = () => {
+  params = {
+    start: 210,
+    arc: 295,
+    radius: 0.7,
+    x: 0,
+    y: 0
+  };
+  drawSegment(params);
+  params = {
+    start: 290,
+    arc: 135,
+    radius: 0.4,
+    x: 0,
+    y: -0.7
+  };
+  drawSegment(params);
+  params = {
+    start: 0,
+    arc: 360,
+    radius: 0.4,
+    x: 0,
+    y: 0.3
+  };
+  drawSegment(params);
+    params = {
+    start: 0,
+    arc: 360,
+    radius: 0.15,
+    x: 0,
+    y: 0.3
+  };
+  drawSegment(params);
+  params = {
+    start: 0,
+    arc: 360,
+    radius: 0.15,
+    x: 0.7,
+    y: 0
+  };
+  drawSegment(params);
+  params = {
+    fromX: 0.4,
+    fromY: 0.2, 
+    toX: 0.6,
+    toY: 0.1
+  };
+  drawThickLine(params);
+    params = {
+    fromX: -0.2,
+    fromY: -0.05, 
+    toX: -0.7,
+    toY: -0.7
+  };
+  drawThickLine(params);
+  params = {
+    fromX: -0.3,
+    fromY: 0.05, 
+    toX: -0.95,
+    toY: -0.3
+  };
+  drawThickLine(params);
+};
+
+const drawMinuteHand = () => {
+  angle = currentDate.getMinutes()/60 * cirRad;
+  //angle = currentDate.getSeconds()/60 * cirRad;
+  g.setColor(0,1,0);
+  var points = [centerX,centerY];
+  for (i = 0; i < angle; i=i+cirRad/60) {
+    points.push(Math.round(centerX + Math.sin(i) * radius),
+                Math.round(centerY - Math.cos(i) * radius));
+  }
+  g.fillPoly(points);
+};
+
+const drawHourHand = () => {
+  g.setColor(0,0,0);
+  //angle = currentDate.getMinutes()/60 * cirRad;
+  angle = currentDate.getHours()/12 * cirRad;
+  g.fillCircle(
+    Math.round(centerX + Math.sin(angle) * radius * (1-proportion)),
+    Math.round(centerY - Math.cos(angle) * radius * (1-proportion)),
+    radius * proportion
+  );
+};
+
+const drawClockFace = () => {
+    g.setColor(0.1,0.7,0);
+    g.fillCircle(centerX,centerY,radius*0.98);
+  };
+
+const drawAll = () => {
+  currentDate = new Date();
+  g.clear();
+  Bangle.drawWidgets();
+  drawClockFace();
+  drawHands();
+};
+
+
+const startTimers = () => {
+  //timer = setInterval(drawAll, 1000);
+  timer = setInterval(drawAll, 1000*20);
+};
+
+Bangle.on('lcdPower', (on) => {
+  if (on) {
+    startTimers();
+    drawAll();
+  } else {
+    if (timer) {
+      clearInterval(timer);
+    }
+  }
+});
+
+g.clear();
+startTimers();
+Bangle.loadWidgets();
+drawAll();
+
+// Show launcher when middle button pressed
+setWatch(Bangle.showLauncher, BTN2, { repeat: false, edge: "falling" });