add widhr (Last announced heartrate BPM Widget)

apps/widhr/ChangeLog

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+0.01: First release

apps/widhr/README.md

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+# Last announced heartrate BPM Widget
+
+*Displays the last announced bpm measurement from Bangle.on('HRM', ...);
+*it does not enable the heartrate sensor to do measurements it waits on such annoucement. I use it to view the last read value when letting the system take a reading every 10 minutes.
+*saves last read value to a file so it can display that last value between app starts / reboots
+
+![](screenshot_widhr.png)
+
+Code based on Lato Pedometer Written by: [Hugh Barney](https://github.com/hughbarney)
+Code Modified by: [Willems Davy](https://github.com/joyrider3774)

apps/widhr/metadata.json

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+{
+  "id": "widhr",
+  "name": "Last announced heartrate BPM Widget",
+  "shortName":"Last Heartrate BPM",
+  "icon": "widhr.icon.png",
+  "screenshots": [{"url":"screenshot_widhr.png"}],
+  "version":"0.01",
+  "type": "widget",
+  "supports": ["BANGLEJS2"],
+  "readme": "README.md",
+  "description": "Displays the last announced heartrate BPM from `Bangle.on(\"HRM\", ...);` (it does not enable the hrm sensor it expects the system or other app todo so)",
+  "tags": "widget",
+  "data": [
+	{"name":"widhr.data.json"}
+  ],
+  "storage": [
+    {"name":"widhr.wid.js","url":"widhr.wid.js"}
+   ]
+ }

apps/widhr/widhr.wid.js

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+function widhr_hrm(hrm) {
+  require("Storage").writeJSON("widhr.data.json", {"bpm":hrm.bpm});
+  WIDGETS["widhr"].draw();
+}
+
+Bangle.on('HRM', widhr_hrm);
+
+function widhr_draw() {
+  var json = require("Storage").readJSON("widhr.data.json");
+  var bpm = json === undefined ? 0 : json.bpm;
+  //3x6 from bpm text in 6x8 font
+  var w = (bpm.toString().length)*8 > 3 * 6 ? (bpm.toString().length)*8 : 3 * 6;
+  if (w != this.width)
+  {
+    this.width = w;
+    setTimeout(() => Bangle.drawWidgets(),10); return;
+  }
+  g.reset();
+  g.setColor(g.theme.bg);
+  g.fillRect(this.x, this.y, this.x + this.width, this.y + 23); // erase background
+  g.setColor(g.theme.fg);
+  g.setFont("6x8:1");
+  g.setFontAlign(-1, 0);
+  g.drawString("bpm", this.x, this.y + 5);
+  g.setFont("4x6:2");
+  g.setFontAlign(-1, 0);
+  g.drawString(bpm, this.x, this.y + 17);
+}
+
+WIDGETS["widhr"]={area:"tl",sortorder:-1,width:13,draw:widhr_draw};