/
app.js
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/
app.js
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Bangle.loadWidgets();
Bangle.drawWidgets();
var settings = require("Storage").readJSON("gpsrec.json",1)||{};
var osm;
try { // if it's installed, use the OpenStreetMap module
osm = require("openstmap");
} catch (e) {}
function getFN(n) {
return ".gpsrc"+n.toString(36);
}
function updateSettings() {
require("Storage").write("gpsrec.json", settings);
if (WIDGETS["gpsrec"])
WIDGETS["gpsrec"].reload();
}
function showMainMenu() {
const mainmenu = {
'': { 'title': 'GPS Record' },
'RECORD': {
value: !!settings.recording,
format: v=>v?"On":"Off",
onchange: v => {
settings.recording = v;
updateSettings();
}
},
'File #': {
value: settings.file|0,
min: 0,
max: 35,
step: 1,
onchange: v => {
settings.recording = false;
settings.file = v;
updateSettings();
}
},
'Time Period': {
value: settings.period||10,
min: 1,
max: 120,
step: 1,
format: v=>v+"s",
onchange: v => {
settings.recording = false;
settings.period = v;
updateSettings();
}
},
'View Tracks': ()=>{viewTracks();},
'< Back': ()=>{load();}
};
return E.showMenu(mainmenu);
}
function viewTracks() {
const menu = {
'': { 'title': 'GPS Tracks' }
};
var found = false;
for (var n=0;n<36;n++) {
var f = require("Storage").open(getFN(n),"r");
if (f.readLine()!==undefined) {
menu["Track "+n] = (n=>viewTrack(n)).bind(null,n,false);
found = true;
}
}
if (!found)
menu["No Tracks found"] = function(){};
menu['< Back'] = () => { showMainMenu(); };
return E.showMenu(menu);
}
function getTrackInfo(fn) {
"ram"
var filename = getFN(fn);
var minLat = 90;
var maxLat = -90;
var minLong = 180;
var maxLong = -180;
var starttime, duration=0;
var f = require("Storage").open(filename,"r");
if (f===undefined) return;
var l = f.readLine(f);
var nl = 0, c, n;
if (l!==undefined) {
c = l.split(",");
starttime = parseInt(c[0]);
}
// pushed this loop together to try and bump loading speed a little
while(l!==undefined) {
++nl;c=l.split(",");
n = +c[1];if(n>maxLat)maxLat=n;if(n<minLat)minLat=n;
n = +c[2];if(n>maxLong)maxLong=n;if(n<minLong)minLong=n;
l = f.readLine(f);
}
if (c) duration = parseInt(c[0]) - starttime;
var lfactor = Math.cos(minLat*Math.PI/180);
var ylen = (maxLat-minLat);
var xlen = (maxLong-minLong)* lfactor;
var screenSize = g.getHeight()-48; // 24 for widgets, plus a border
var scale = xlen>ylen ? screenSize/xlen : screenSize/ylen;
return {
fn : fn,
filename : filename,
time : new Date(starttime),
records : nl,
minLat : minLat, maxLat : maxLat,
minLong : minLong, maxLong : maxLong,
lat : (minLat+maxLat)/2, lon : (minLong+maxLong)/2,
lfactor : lfactor,
scale : scale,
duration : Math.round(duration/1000)
};
}
function asTime(v){
var mins = Math.floor(v/60);
var secs = v-mins*60;
return ""+mins.toString()+"m "+secs.toString()+"s";
}
function viewTrack(n, info) {
if (!info) {
E.showMessage("Loading...","GPS Track "+n);
info = getTrackInfo(n);
}
const menu = {
'': { 'title': 'GPS Track '+n }
};
if (info.time)
menu[info.time.toISOString().substr(0,16).replace("T"," ")] = function(){};
menu["Duration"] = { value : asTime(info.duration)};
menu["Records"] = { value : ""+info.records };
menu['Plot Map'] = function() {
info.qOSTM = false;
plotTrack(info);
};
if (osm)
menu['Plot OpenStMap'] = function() {
info.qOSTM = true;
plotTrack(info);
}
menu['Plot Alt.'] = function() {
plotGraph(info, "altitude");
};
menu['Plot Speed'] = function() {
plotGraph(info, "speed");
};
menu['Erase'] = function() {
E.showPrompt("Delete Track?").then(function(v) {
if (v) {
settings.recording = false;
updateSettings();
var f = require("Storage").open(getFN(n),"r");
f.erase();
viewTracks();
} else
viewTrack(n, info);
});
};
menu['< Back'] = () => { viewTracks(); };
return E.showMenu(menu);
}
function plotTrack(info) {
"ram"
function distance(lat1,long1,lat2,long2) { "ram"
var x = (long1-long2) * Math.cos((lat1+lat2)*Math.PI/360);
var y = lat2 - lat1;
return Math.sqrt(x*x + y*y) * 6371000 * Math.PI / 180;
}
// Function to convert lat/lon to XY
var getMapXY;
if (info.qOSTM) {
getMapXY = osm.latLonToXY.bind(osm);
} else {
getMapXY = function(lat, lon) { "ram"
return {x:cx + Math.round((long - info.lon)*info.lfactor*info.scale),
y:cy + Math.round((info.lat - lat)*info.scale)};
}
}
E.showMenu(); // remove menu
E.showMessage("Drawing...","GPS Track "+info.fn);
g.flip(); // on buffered screens, draw a not saying we're busy
g.clear(1);
var s = require("Storage");
var cx = g.getWidth()/2;
var cy = 24 + (g.getHeight()-24)/2;
g.setColor(1,0.5,0.5);
g.setFont("Vector",16);
g.drawString("Track"+info.fn.toString()+" - Loading",10,220);
g.setColor(g.theme.bg);
g.fillRect(0,220,239,239);
if (!info.qOSTM) {
g.setColor(1, 0, 0);
g.fillRect(9,80,11,120);
g.fillPoly([9,60,19,80,0,80]);
g.setColor(g.theme.fg);
g.drawString("N",2,40);
} else {
osm.lat = info.lat;
osm.lon = info.lon;
osm.draw();
g.setColor(0, 0, 0);
}
g.drawString(asTime(info.duration),10,220);
var f = require("Storage").open(info.filename,"r");
if (f===undefined) return;
var l = f.readLine(f);
var ox=0;
var oy=0;
var olat,olong,dist=0;
var i=0;
var c = l.split(",");
var lat = +c[1];
var long = +c[2];
var mp = getMapXY(lat, long);
g.moveTo(mp.x,mp.y);
g.setColor(0,1,0);
g.fillCircle(mp.x,mp.y,5);
if (info.qOSTM) g.setColor(1,0,0.55);
else g.setColor(g.theme.fg);
l = f.readLine(f);
while(l!==undefined) {
c = l.split(",");
lat = +c[1];
long = +c[2];
mp = getMapXY(lat, long);
g.lineTo(mp.x,mp.y);
if (info.qOSTM) g.fillCircle(mp.x,mp.y,2); // make the track more visible
var d = distance(olat,olong,lat,long);
if (!isNaN(d)) dist+=d;
olat = lat;
olong = long;
ox = mp.x;
oy = mp.y;
l = f.readLine(f);
}
g.setColor(1,0,0);
g.fillCircle(ox,oy,5);
if (info.qOSTM) g.setColor(0, 0, 0);
else g.setColor(g.theme.fg);
g.drawString(require("locale").distance(dist),g.getWidth() / 2, g.getHeight() - 20);
g.setFont("6x8",2);
g.setFontAlign(0,0,3);
g.drawString("Back",g.getWidth() - 10, g.getHeight()/2);
setWatch(function() {
viewTrack(info.fn, info);
}, global.BTN3||BTN1);
Bangle.drawWidgets();
g.flip();
}
function plotGraph(info, style) {
"ram"
E.showMenu(); // remove menu
E.showMessage("Calculating...","GPS Track "+info.fn);
var filename = getFN(info.fn);
var infn = new Float32Array(80);
var infc = new Uint16Array(80);
var title;
var lt = 0; // last time
var tn = 0; // count for each time period
var strt, dur = info.duration;
var f = require("Storage").open(filename,"r");
if (f===undefined) return;
var l = f.readLine(f);
var nl = 0, c, i;
if (l!==undefined) {
c = l.split(",");
strt = c[0]/1000;
}
if (style=="altitude") {
title = "Altitude (m)";
while(l!==undefined) {
++nl;c=l.split(",");
i = Math.round(80*(c[0]/1000 - strt)/dur);
infn[i]+=+c[3];
infc[i]++;
l = f.readLine(f);
}
} else if (style=="speed") {
title = "Speed (m/s)";
var p,lp = Bangle.project({lat:c[1],lon:c[2]});
var t,dx,dy,d,lt = c[0]/1000;
while(l!==undefined) {
++nl;c=l.split(",");
i = Math.round(80*(c[0]/1000 - strt)/dur);
t = c[0]/1000;
p = Bangle.project({lat:c[1],lon:c[2]});
dx = p.x-lp.x;
dy = p.y-lp.y;
d = Math.sqrt(dx*dx+dy*dy);
if (t!=lt) {
infn[i]+=d / (t-lt); // speed
infc[i]++;
}
lp = p;
lt = t;
l = f.readLine(f);
}
} else throw new Error("Unknown type");
var min=100000,max=-100000;
for (var i=0;i<infn.length;i++) {
if (infc[i]>0) infn[i]/=infc[i];
var n = infn[i];
if (n>max) max=n;
if (n<min) min=n;
}
// work out a nice grid value
var heightDiff = max-min;
var grid = 1;
while (heightDiff/grid > 8) {
grid*=2;
}
// draw
g.clear(1).setFont("6x8",1);
var r = require("graph").drawLine(g, infn, {
x:4,y:24,
width: g.getWidth()-24,
height: g.getHeight()-(24+8),
axes : true,
gridy : grid,
gridx : infn.length / 3,
title: title,
xlabel : x=>Math.round(x*dur/(60*infn.length))+" min" // minutes
});
g.setFont("6x8",2);
g.setFontAlign(0,0,3);
g.drawString("Back",g.getWidth() - 10, g.getHeight() - 40);
setWatch(function() {
viewTrack(info.fn, info);
}, global.BTN3||BTN1);
g.flip();
}
showMainMenu();