Import of the watch repository from Pebble

applib-targets/emscripten/html/js/controls.js

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+/**
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+window.addEventListener('load', function() {
+  var form = document.getElementById("controls-form");
+  form.addEventListener('submit', function(e) {
+    e.preventDefault();
+  });
+
+  var timestampInput = document.getElementById("timestamp-input");
+  timestampInput.addEventListener('change', function(e) {
+    rockySimulator.setTime(Number(e.target.value) * 1000);
+  });
+
+  var timezoneSlider = document.getElementById("timezone-offset-input");
+  var timezoneSpan = document.getElementById("timezone-offset-span");
+  var timezoneSliderOnChange = function() {
+    var offset = timezoneSlider.value;
+    rockySimulator.setTimezoneOffset(offset);
+    var sign;
+    if (offset > 0) {
+      sign = '+';
+    } else if (offset < 0) {
+      sign = '-';
+    } else {
+      sign = '';
+    }
+    var offsetMinutes = (offset % 60);
+    var absOffsetHours = Math.abs((offset - offsetMinutes) / 60);
+    var gmtText = 'GMT ' + sign + absOffsetHours;
+    if (offsetMinutes) {
+      var absOffsetMinutes = Math.abs(offsetMinutes);
+      gmtText += ':' + (absOffsetMinutes < 10 ? '0' : '') + absOffsetMinutes;
+    }
+    timezoneSpan.innerText = gmtText;
+  };
+  timezoneSlider.addEventListener('change', timezoneSliderOnChange);
+  timezoneSlider.addEventListener('input', timezoneSliderOnChange);
+
+  // After loading the page, set the slider to the local TZ:
+  var localTimezoneOffset = new Date().getTimezoneOffset();
+  timezoneSlider.value = localTimezoneOffset;
+  timezoneSliderOnChange();
+
+  var time24hStyle = document.getElementById("24h-style-input");
+  time24hStyle.addEventListener('change', function(e) {
+    rockySimulator.set24hStyle(e.target.checked);
+  });
+});

applib-targets/emscripten/html/js/tictoc.js

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+/**
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+var WatchfaceHelper = function(date) {
+  function clockwiseRad(fraction) {
+    // TODO: figure out if this is actually correct orientation for Canvas APIs
+    return (1.5 - fraction) * 2 * Math.PI;
+  }
+
+  date = date || new Date();
+  var secondFraction = date.getSeconds() / 60;
+  var minuteFraction = (date.getMinutes()) / 60;
+  var hourFraction = (date.getHours() % 12 + minuteFraction) / 12;
+  this.secondAngle = clockwiseRad(secondFraction);
+  this.minuteAngle = clockwiseRad(minuteFraction);
+  this.hourAngle = clockwiseRad(hourFraction);
+};
+
+// book keeping so that we can easily animate the two hands for the watchface
+// .scale/.angle are updated by tween/event handler (see below)
+var renderState = {
+  minute: {style: 'white', scale: 0.80, angle: 0},
+  hour: {style: 'red', scale: 0.51, angle: 0}
+};
+
+// helper function for the draw function (see below)
+// extracted as a standalone function to satisfy common believe in efficient JS code
+// TODO: verify that this has actually any effect on byte code level
+var drawHand = function(handState, ctx, cx, cy, maxRadius) {
+  ctx.lineWidth = 8;
+  ctx.strokeStyle = handState.style;
+  ctx.beginPath();
+  ctx.moveTo(cx, cy);
+  ctx.lineTo(cx + Math.sin(handState.angle) * handState.scale * maxRadius,
+             cy + Math.cos(handState.angle) * handState.scale * maxRadius);
+  ctx.stroke();
+};
+
+// the 'draw' event is being emitted after each call to rocky.requestDraw() but
+// at most once for each screen update, even if .requestDraw() is called frequently
+// the 'draw' event might also fire at other meaningful times (e.g. upon launch)
+rocky.on('draw', function(drawEvent) {
+  var ctx = drawEvent.context;
+  var w = ctx.canvas.unobstructedWidth;
+  var h = ctx.canvas.unobstructedHeight;
+
+  // clear canvas on each render
+  ctx.fillStyle = 'black';
+  ctx.fillRect(0, 0, ctx.canvas.clientWidth, ctx.canvas.clientHeight);
+
+  // center point
+  var cx = w / 2;
+  var cy = h / 2;
+  var maxRadius = Math.min(w, h - 2 * 10) / 2;
+  drawHand(renderState.minute, ctx, cx, cy, maxRadius);
+  drawHand(renderState.hour, ctx, cx, cy, maxRadius);
+
+  // Draw a 12 o clock indicator
+  drawHand({style: 'white', scale: 0, angle: 0}, ctx, cx, 8, 0);
+  // overdraw center so that no white part of the minute hand is visible
+  drawHand({style: 'red', scale: 0, angle: 0}, ctx, cx, cy, 0);
+});
+
+// listener is called on each full minute and once immediately after registration
+rocky.on('minutechange', function(e) {
+  // WatchfaceHelper will later be extracted as npm module
+  var wfh = new WatchfaceHelper(e.date);
+  renderState.minute.angle = wfh.minuteAngle;
+  renderState.hour.angle = wfh.hourAngle;
+  rocky.requestDraw();
+});
+
+rocky.on('secondchange', function(e) {
+  console.log(e.date.toLocaleTimeString() + ' ' + e.date.toLocaleDateString() +
+    ' ' + e.date.toLocaleString());
+});
+
+console.log('TicToc launched');