From 0541cc10cd724bd8cb685914a8b032aafd2dce13 Mon Sep 17 00:00:00 2001
From: Gordon Williams <gw@pur3.co.uk>
Date: Thu, 13 Feb 2020 12:08:35 +0000
Subject: [PATCH] Add heart rate widget

---
 apps.json             |  11 +++++++++
 apps/whrm/ChangeLog   |   1 +
 apps/whrm/widget.js   |  53 ++++++++++++++++++++++++++++++++++++++++++
 apps/whrm/widget.json |   4 ++++
 apps/whrm/widget.png  | Bin 0 -> 1777 bytes
 5 files changed, 69 insertions(+)
 create mode 100644 apps/whrm/ChangeLog
 create mode 100644 apps/whrm/widget.js
 create mode 100644 apps/whrm/widget.json
 create mode 100644 apps/whrm/widget.png

diff --git a/apps.json b/apps.json
index 8915654fc..354180d09 100644
--- a/apps.json
+++ b/apps.json
@@ -319,6 +319,17 @@
       {"name":"*hrm","url":"heartrate-icon.js","evaluate":true}
     ]
   },
+  { "id": "whrm",
+    "name": "Simple Heart Rate widget",
+    "icon": "widget.png",
+    "version":"0.01",
+    "description": "When the screen is turned on, the widget turns on the heart rate monitor and displays the detected heart rate - can take 20s to get a reading.",
+    "tags": "health,widget",
+    "storage": [
+      {"name":"+whrm","url":"widget.json"},
+      {"name":"=whrm","url":"widget.js"}
+    ]
+  },
   { "id": "stetho",
     "name": "Stethoscope",
     "icon": "stetho.png",
diff --git a/apps/whrm/ChangeLog b/apps/whrm/ChangeLog
new file mode 100644
index 000000000..4c21f3ace
--- /dev/null
+++ b/apps/whrm/ChangeLog
@@ -0,0 +1 @@
+0.01: New Widget!
diff --git a/apps/whrm/widget.js b/apps/whrm/widget.js
new file mode 100644
index 000000000..3a1d5da09
--- /dev/null
+++ b/apps/whrm/widget.js
@@ -0,0 +1,53 @@
+(() => {
+  var xpos = WIDGETPOS.tl;
+  var width = 24;
+  WIDGETPOS.tl += width+2;
+  var currentBPM = undefined;
+  var lastBPM = undefined;
+  var firstBPM = true; // first reading since sensor turned on
+
+  function draw() {
+  	g.reset();
+    g.setFont("6x8", 1);
+    g.setFontAlign(0, 0);
+    g.clearRect(xpos,15,xpos+width,24); // erase background
+    var bpm = currentBPM, isCurrent = true;
+    if (bpm===undefined) {
+      bpm = lastBPM;
+      isCurrent = false;
+    }
+    if (bpm===undefined)
+      bpm = "--";
+    g.setColor(isCurrent ? "#ffffff" : "#808080");
+    g.drawString(bpm, xpos+width/2, 19);
+    g.setColor(isCurrent ? "#ff0033" : "#808080");
+    g.drawImage(atob("CgoCAAABpaQ//9v//r//5//9L//A/+AC+AAFAA=="),xpos+(width-10)/2,1);
+    g.setColor(-1);
+  }
+
+  // redraw when the LCD turns on
+  Bangle.on('lcdPower', function(on) {
+    if (on) {
+      Bangle.setHRMPower(1);
+      firstBPM = true;
+      currentBPM = undefined;
+      draw();
+    } else {
+      Bangle.setHRMPower(0);
+    }
+  });
+
+  Bangle.on('HRM',function(d) {
+    if (firstBPM)
+      firstBPM=false; // ignore the first one as it's usually rubbish
+    else {
+      currentBPM = d.bpm;
+      lastBPM = currentBPM;
+    }
+    draw();
+  });
+  Bangle.setHRMPower(Bangle.isLCDOn());
+
+  // add your widget
+  WIDGETS["hrm"]={draw:draw};
+})();
diff --git a/apps/whrm/widget.json b/apps/whrm/widget.json
new file mode 100644
index 000000000..fbc51b789
--- /dev/null
+++ b/apps/whrm/widget.json
@@ -0,0 +1,4 @@
+{
+  "name":"Heart Rate Widget", "type":"widget",
+  "src":"=whrm"
+}
diff --git a/apps/whrm/widget.png b/apps/whrm/widget.png
new file mode 100644
index 0000000000000000000000000000000000000000..5bc07d6474a68433d2610723b1dcf85b80fde104
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