BangleApps/apps/binclock/app.js

// Load fonts
require("Font7x11Numeric7Seg").add(Graphics);
// position on screen
const X = 160, Y = 180;
var displayTime = 0;
var minuteLED = [0,0,0,0,0,0];
var hourLED = [0,0,0,0,0];
var prevMinute = [0,0,0,0,0,0];
var prevHour = [0,0,0,0,0];


function drawTime(d) {
  // work out how to display the current time
  var h = d.getHours(), m = d.getMinutes();
  var time = (" "+h).substr(-2) + ":" + ("0"+m).substr(-2);
  // draw the current time (4x size 7 segment)
  g.setFont("7x11Numeric7Seg",4);
  g.setFontAlign(1,1); // align right bottom
  g.drawString(time, X, Y, true /*clear background*/);
  // draw the seconds (2x size 7 segment)
  g.setFont("7x11Numeric7Seg",2);
  g.drawString(("0"+d.getSeconds()).substr(-2), X+30, Y, true /*clear background*/);
}

function updateHourArray(hours){

  var j;
  for(j=0;j<hourLED.length;j++){
    prevHour[j] = hourLED[j];
  }

  var i;
  for(i = 0;i < hourLED.length;i++){
    hourLED[i]=0;
  }

  if(hours > 15){
    hourLED[0] = 1;
    hours = hours - 16;
  }
  if(hours > 7){
    hourLED[1] = 1;
    hours = hours - 8;
  }
  if(hours > 3){
    hourLED[2] = 1;
    hours = hours - 4;
  }
  if(hours > 1){
    hourLED[3] = 1;
    hours = hours - 2;
  }
  if(hours > 0){
    hourLED[4] = 1;
  }

  return hourLED;

}

function updateMinuteArray(minutes){
  var j;
  for(j=0;j<minuteLED.length;j++){
    prevMinute[j] = minuteLED[j];
  }

  var i;
  for(i = 0;i < minuteLED.length;i++){
    minuteLED[i]=0;
  }

  if(minutes > 31){
    minuteLED[0] = 1;
    minutes = minutes - 32;
  }
  if(minutes > 15){
    minuteLED[1] = 1;
    minutes = minutes - 16;
  }
  if(minutes > 7){
    minuteLED[2] = 1;
    minutes = minutes - 8;
  }
  if(minutes > 3){
    minuteLED[3] = 1;
    minutes = minutes - 4;
  }
  if(minutes > 1){
    minuteLED[4] = 1;
    minutes = minutes - 2;
  }
  if(minutes > 0){
    minuteLED[5] = 1;
  }

  return minuteLED;

}

function draw(){

  // work out how to display the current time
  var d = new Date();
  var h = d.getHours(), m = d.getMinutes();

  updateHourArray(h);
  updateMinuteArray(m);

  var i;
  //Draw hour circles
  for(i=0; i<hourLED.length; i++){
    if(prevHour[i] == hourLED[i]){
      if(hourLED[i] == 1){
        g.fillCircle(24+i*48,50,10);
      } else {
        var colour = g.getColor();
        g.setColor(0,0,0);
        g.fillCircle(24+i*48,50,10);
        g.setColor(colour);
        g.drawCircle(24+i*48,50,10);
      }
    }
  }

  for(i=0; i<minuteLED.length; i++){
    if(prevMinute[i] == minuteLED[i]){
      if(minuteLED[i] == 1){
        g.fillCircle(20+i*40,100,10);
      } else {
        var colour = g.getColor();
        g.setColor(0,0,0);
        g.fillCircle(20+i*40,100,10);
        g.setColor(colour);
        g.drawCircle(20+i*40,100,10);
      }
    }
  }

  // draw the date, in a normal font
  g.setFont("6x8");
  g.setFontAlign(0,1); // align center bottom
  // pad the date - this clears the background if the date were to change length
  var dateStr = "    "+require("locale").date(d)+"    ";
  g.drawString(dateStr, g.getWidth()/2, 130, true /*clear background*/);

  if(displayTime){
    drawTime(d);
  }else{
    g.clearRect(0,240,240,130);
  }
}

// Clear the screen once, at startup
g.clear();
// draw immediately at first
draw();
var secondInterval = setInterval(draw, 1000);
// Stop updates when LCD is off, restart when on
Bangle.on('lcdPower',on=>{
  if (secondInterval) clearInterval(secondInterval);
  secondInterval = undefined;
  if (on) {
    setInterval(draw, 1000);
    draw(); // draw immediately
  }
});
// Show launcher when button pressed
Bangle.setUI("clockupdown", btn=>{
  if (btn!=1) return;
  if(displayTime == 0){
    displayTime = 1;
  } else{
    displayTime = 0;
  }
});
// Load widgets
Bangle.loadWidgets();
Bangle.drawWidgets();