BangleApps/apps/gpsnav/app.min.js

var Yoff=40,pal2color=new Uint16Array([0,65535,2047,50712],0,2),buf=Graphics.createArrayBuffer(240,50,2,{msb:!0}),candraw=!0;function flip(a,c){g.drawImage({width:240,height:50,bpp:2,buffer:a.buffer,palette:pal2color},0,c);a.clear()}var brg=0,wpindex=0,labels="N NE E SE S SW W NW".split(" "),loc=require("locale");
function drawCompass(a){if(candraw){buf.setColor(1);buf.setFont("Vector",24);var c=a-90;0>c&&(c+=360);buf.fillRect(28,45,212,49);var b=30,d=15-c%15;15>d?b+=d:d=0;for(var e=d;e<=180-d;e+=15){var f=c+e;0==f%90?(buf.drawString(labels[Math.floor(f/45)%8],b-8,0),buf.fillRect(b-2,25,b+2,45)):0==f%45?(buf.drawString(labels[Math.floor(f/45)%8],b-12,0),buf.fillRect(b-2,30,b+2,45)):0==f%15&&buf.fillRect(b,35,b+1,45);b+=15}0!=wpindex&&(a=brg-a,180<a&&(a-=360),-180>a&&(a+=360),a+=120,30>a&&(a=14),210<a&&(a=226),
buf.setColor(2),buf.fillCircle(a,40,8));flip(buf,Yoff)}}var heading=0;function newHeading(a,c){var b=Math.abs(a-c),d=a>c?1:-1;180<=b&&(b=360-b,d=-d);if(2>b)return c;b=c+d*(1+Math.round(b/5));0>b&&(b+=360);360<b&&(b-=360);return b}var course=0,speed=0,satellites=0,wp,dist=0;function radians(a){return a*Math.PI/180}function degrees(a){return(180*a/Math.PI+360)%360}
function bearing(a,c){var b=radians(c.lon-a.lon),d=radians(a.lat),e=radians(c.lat);return Math.round(degrees(Math.atan2(Math.sin(b)*Math.cos(e),Math.cos(d)*Math.sin(e)-Math.sin(d)*Math.cos(e)*Math.cos(b))))}function distance(a,c){var b=radians(a.lon-c.lon)*Math.cos(radians((a.lat+c.lat)/2)),d=radians(c.lat-a.lat);return Math.round(6371E3*Math.sqrt(b*b+d*d))}var selected=!1;
function drawN(){var a=loc.speed(speed);buf.setColor(1);buf.setFont("6x8",2);buf.drawString("o",100,0);buf.setFont("6x8",1);buf.drawString(a.substring(a.length-3),220,40);buf.setFont("Vector",48);var c=course.toString();c=10>course?"00"+c:100>course?"0"+c:c;buf.drawString(c,10,0);buf.drawString(a.substring(0,a.length-3),140,4);flip(buf,Yoff+70);buf.setColor(1);buf.setFont("Vector",24);a=brg.toString();a=10>brg?"00"+a:100>brg?"0"+a:a;buf.setColor(3);buf.drawString("Brg: ",0,0);buf.drawString("Dist: ",
0,30);buf.setColor(selected?1:2);buf.drawString(wp.name,140,0);buf.setColor(1);buf.drawString(a,60,0);buf.drawString(loc.distance(dist),60,30);flip(buf,Yoff+130);g.setFont("6x8",1);g.setColor(0,0,0);g.fillRect(10,230,60,239);g.setColor(1,1,1);g.drawString("Sats "+satellites.toString(),10,230)}var savedfix;
function onGPS(a){savedfix=a;void 0!==a&&(course=isNaN(a.course)?course:Math.round(a.course),speed=isNaN(a.speed)?speed:a.speed,satellites=a.satellites);candraw&&(void 0!==a&&1==a.fix&&(dist=distance(a,wp),isNaN(dist)&&(dist=0),brg=bearing(a,wp),isNaN(brg)&&(brg=0)),drawN())}var intervalRef;function stopdraw(){candraw=!1;intervalRef&&clearInterval(intervalRef)}
function startTimers(){candraw=!0;intervalRefSec=setInterval(function(){heading=newHeading(course,heading);course!=heading&&drawCompass(heading)},200)}function drawAll(){g.setColor(1,.5,.5);g.fillPoly([120,Yoff+50,110,Yoff+70,130,Yoff+70]);g.setColor(1,1,1);drawN();drawCompass(heading)}function startdraw(){g.clear();Bangle.drawWidgets();startTimers();drawAll()}
function setButtons(){setWatch(nextwp.bind(null,-1),BTN1,{repeat:!0,edge:"falling"});setWatch(doselect,BTN2,{repeat:!0,edge:"falling"});setWatch(nextwp.bind(null,1),BTN3,{repeat:!0,edge:"falling"})}var SCREENACCESS={withApp:!0,request:function(){this.withApp=!1;stopdraw();clearWatch()},release:function(){this.withApp=!0;startdraw();setButtons()}};Bangle.on("lcdPower",function(a){SCREENACCESS.withApp&&(a?startdraw():stopdraw())});var waypoints=require("waypoints").load();
wp=waypoints[0];function nextwp(a){selected&&(wpindex+=a,wpindex>=waypoints.length&&(wpindex=0),0>wpindex&&(wpindex=waypoints.length-1),wp=waypoints[wpindex],drawN())}function doselect(){selected&&0!=wpindex&&void 0===waypoints[wpindex].lat&&savedfix.fix&&(waypoints[wpindex]={name:"@"+wp.name,lat:savedfix.lat,lon:savedfix.lon},wp=waypoints[wpindex],require("waypoints").save(waypoints));selected=!selected;drawN()}g.clear();Bangle.setLCDBrightness(1);Bangle.loadWidgets();Bangle.drawWidgets();
Bangle.setGPSPower(1);drawAll();startTimers();Bangle.on("GPS",onGPS);setButtons();