Create widget.js

apps/widsmartbatt/widget.js

@@ -0,0 +1,110 @@
+//Learns by averaging power usage every time it is updated
+
+
+(function(){
+  
+  
+  const storage = require("Storage");
+  const filename = "widsmartbatt.json";
+  let runningAvg;
+  var newJson=false;
+  
+  //check if json file exists;
+  
+  function CalcHoursRemaining (batt, usage) {
+    
+    var hrsLeft = 175000 * batt / (100 * usage);
+    return hrsLeft;
+    
+  };
+  
+  function addValue(val) {
+    let summary = storage.readJSON(filename, 1) || { total: 0, count: 0 };
+    summary.total += val;
+    summary.count++;
+    storage.writeJSON(filename, summary); // SAVED!
+
+    let avg = summary.total / summary.count;
+    runningAvg=avg;
+  }
+
+  
+  const intervalLow = 60000; // update time when not charging
+  const intervalHigh = 2000; // update time when charging
+  var showPercent=false;
+  const width=40;
+  const height=24;
+  let COLORS = {
+    'bg':    g.theme.bg,
+    'fg':    g.theme.fg,
+    'charging': "#08f",
+    'high':     g.theme.dark ? "#fff" : "#000",
+    'low':      "#f00",
+  };
+
+  const levelColor = (l) => {
+    if (Bangle.isCharging()) return COLORS.charging;
+    if (l >= 30) return COLORS.high;
+    return COLORS.low;
+  };
+
+  function draw() {
+    var _a = require("power_usage").get(), usage = _a.usage, batt = _a.batt;
+    var s = 29;
+    var x = this.x, y = this.y;
+    var txt;
+    
+    //Add this to total and get the average
+    addValue(usage)
+      
+    if(showPercent){
+      txt=batt;
+    }else{
+      var hrsLeft=CalcHoursRemaining(batt,runningAvg);
+      var days = hrsLeft / 24;
+      txt = days >= 1 ? "".concat(Math.round(Math.min(days, 99)), "d") : "".concat(Math.round(hrsLeft), "h");
+    }
+    
+
+    let xl = x+4+batt*(s-12)/100;
+
+    g.setColor(COLORS.bg);
+    g.fillRect(x+2,y+5,x+s-6,y+18);
+
+    g.setColor(levelColor(batt));
+    g.fillRect(x+1,y+3,x+s-5,y+4);
+    g.fillRect(x+1,y+19,x+s-5,y+20);
+    g.fillRect(x,y+4,x+1,y+19);
+    g.fillRect(x+s-5,y+4,x+s-4,y+19);
+    g.fillRect(x+s-3,y+8,x+s-2,y+16); // tip of the battery
+    g.fillRect(x+4,y+15,xl,y+16); // charging bar
+
+    g.setColor(COLORS.fg);
+    g.setFontAlign(0,0);
+    g.setFont('6x8');
+    g.drawString(txt, x + 14, y + 10);
+
+    if (Bangle.isCharging()) changeInterval(id, intervalHigh);
+      else                   changeInterval(id, intervalLow);
+  }
+
+
+  Bangle.on('charging',function(charging) { draw(); });
+  var id = setInterval(()=>WIDGETS["widsmartbatt"].draw(), intervalLow);
+  Bangle.on("touch", function (_btn, xy) {
+        if (WIDGETS["back"] || !xy)
+            return;
+        var oversize = 5;
+
+        var w = WIDGETS["widsmartbatt"];
+        var x = xy.x, y = xy.y;
+        if (w.x - oversize <= x && x < w.x + width + oversize
+            && w.y - oversize <= y && y < w.y + height + oversize) {
+            E.stopEventPropagation && E.stopEventPropagation();
+            showPercent = true;
+            setTimeout(function () { return (showPercent = false, w.draw(w)); }, 3000);
+            w.draw(w);
+        }
+    });
+  WIDGETS["widsmartbatt"]={area:"tr",width:30,draw:draw};
+})();