var ww, wh;
var hmax, hfact;
var tmin, tmax, tfact;
- var xzero = 20, yzero = 20;
+ var xzero = 36, yzero = 24;
var cold_d = [], hot_d = [];
+ function showdate(utime) {
+ var dt = new Date(utime*1000);
+ return dt.toLocaleDateString() + " " + dt.toLocaleTimeString();
+ }
+
+ function getcomb(lo, hi) {
+ var comb = [], lb = [];
+ var d = hi - lo;
+ var ord = Math.pow(10, Math.floor(Math.log10(d)));
+ var scl = Math.floor(d / ord);
+ var inc, inc2, first, x, lb;
+
+ if (scl < 2) { inc = 0.1; inc2 = 0.2; }
+ else if (scl < 5) { inc = 0.1; inc2 = 0.2; }
+ else { inc = 0.5; inc2 = 1; }
+ inc *= ord;
+ inc2 *= ord;
+ first = (Math.floor(lo / inc) + 1) * inc;
+ for (x = 0; x < (d / inc) - 1.2; x++)
+ comb.push(first + inc * x);
+ first = (Math.floor(lo / inc2) + 1) * inc2;
+ for (x = 0; x < (d / inc2) - 1.2; x++)
+ lb.push(first + inc2 * x);
+ //dbg.innerHTML = "ord=" + ord + "<br>inc=" + inc + "<br>"
+ // + comb + "<br>" + lb;
+ return [comb, lb];
+ }
+
function px(x) {
return xzero + ((x - tmin) * tfact);
}
+
function py(y) {
return wh - yzero - (y * hfact);
}
+
function xaxis() {
ctx.beginPath();
ctx.moveTo(px(tmin), py(0));
ctx.lineTo(px(tmax), py(0));
ctx.strokeStyle = "black";
ctx.stroke();
+
+ ctx.fillStyle = "black";
+ ctx.font = "bold 12px Courier";
+ ctx.textAlign = "left";
+ ctx.fillText(showdate(tmin), px(tmin), py(0) + 20);
+ ctx.textAlign = "right";
+ ctx.fillText(showdate(tmax), px(tmax), py(0) + 20);
}
+
function yaxis() {
+ var comb = getcomb(0, hmax);
+ var i;
+
+ ctx.beginPath();
+ for (i = 0; comb[0][i]; i++) {
+ ctx.moveTo(px(tmin) - 5, py(comb[0][i]));
+ ctx.lineTo(px(tmax), py(comb[0][i]));
+ }
+ ctx.strokeStyle = "lightgray";
+ ctx.stroke();
+
ctx.beginPath();
ctx.moveTo(px(tmin), py(0));
ctx.lineTo(px(tmin), py(hmax));
ctx.strokeStyle = "black";
ctx.stroke();
+
+ ctx.fillStyle = "black";
+ ctx.font = "bold 12px Courier";
+ ctx.textAlign = "right";
+ ctx.fillText(0, px(tmin) - 6, py(0));
+ for (i = 0; comb[1][i]; i++) {
+ ctx.fillText(comb[1][i].toFixed(1), px(tmin) - 6, py(comb[1][i]));
+ }
+ ctx.textAlign = "left";
+ ctx.fillText("l/h", px(tmin) + 4, py(hmax) + 8);
}
+
/* @ updates global var `hmax` */
function differentiate(times) {
var res = [];
dv = times[i+1][1] - times[i][1];
dt = times[i+1][0] - times[i][0];
if (dt != 0 && dv != 0) {
- v = dv / dt;
+ v = (dv / dt) * 360 ; /* Litres per hour */
if (hmax < v) hmax = v;
res.push([times[i][0], v]);
}
}
- res.push([times[i][0], v]);
+ if (i) res.push([times[i][0], v]);
return res;
}
+
function drawplot(data, color) {
var i;
ctx.strokeStyle = color;
ctx.stroke();
}
+
+ function showloading() {
+ ctx.fillStyle = "green";
+ ctx.font = "bold 16px Courier";
+ ctx.textAlign="center";
+ ctx.fillText("...loading...", (ww / 2) , (wh / 2) + 8);
+ }
+
+ function showempty() {
+ ctx.fillStyle = "red";
+ ctx.font = "bold 24px Courier";
+ ctx.textAlign="center";
+ ctx.fillText("No data for the requested time interval",
+ (ww / 2) , (wh / 2) + 8);
+ }
+
+ function clearplot() {
+ ctx.clearRect(0, 0, ww, wh);
+ }
+
function redraw() {
- if (cold_d.length && hot_d.length) {
- drawplot(cold_d, "blue");
- drawplot(hot_d, "red");
+ clearplot();
+ if (cold_d.length || hot_d.length) {
+ tfact = (ww - xzero) / (tmax - tmin);
+ hfact = (wh - yzero) / hmax;
xaxis();
yaxis();
+ drawplot(cold_d, "blue");
+ drawplot(hot_d, "red");
} else {
- /* load animation here */ ;
+ showempty();
}
}
(data.current.hot / 100).toFixed(2);
tmin = data.range.lo;
tmax = data.range.hi;
- tfact = (ww - xzero) / (tmax - tmin);
+ //dbg.innerHTML = "from " + tmin + " to " + tmax
+ // + "<br>from " + showdate(tmin) + " to " + showdate(tmax);
/* differetiate() updates hmax */
hmax = 0;
cold_d = differentiate(data.cold);
hot_d = differentiate(data.hot);
- hfact = (wh - yzero) / hmax;
- //document.getElementById("debug").innerHTML = cold_d + "<br>" + hot_d;
+ //dbg.innerHTML = "hmax=" + hmax + " hfact=" + hfact + "<br>"
+ // + cold_d + "<br>" + hot_d;
redraw();
}
+ function iso2qu(idate) {
+ return idate.replace("T", "+").replace("0Z", "");
+ }
+
function sendquery(lo, hi) {
- var url = "query.cgi";
+ var url = "query.cgi" + "?lo=" + iso2qu(lo) + "&hi=" + iso2qu(hi);
- if (lo && hi) url += "?lo=" + lo + "&" + hi;
- else url = "query.cgi?lo=2015-12-19+00:00:00&hi=2015-12-20+00:00:00"; //FIX
+ //dbg.innerHTML = url;
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
// dbg.innerHTML = xmlhttp.responseText;
}
}
xmlhttp.open("GET", url, true);
+ clearplot();
+ showloading();
xmlhttp.send();
}
function resize() {
- ww = window.innerWidth;
+ ww = window.innerWidth - 4;
if (ww > window.innerHeight) ww = window.innerHeight;
wh = ww / 2;
canvas.width = ww;
redraw();
}
+ function daystart(date) {
+ date.setMilliseconds(0);
+ date.setSeconds(0);
+ date.setMinutes(0);
+ date.setHours(0);
+ return date;
+ }
+
+ function prevweek() {
+ var tdy = daystart(new Date());
+ var dow = tdy.getDay();
+ var wstart, wend;
+
+ wstart = new Date(1*tdy - 86400000 * (dow + 7));
+ wend = new Date(1*wstart + 86400000 * 7);
+ xmlhttp = new XMLHttpRequest();
+ sendquery(wstart.toISOString(), wend.toISOString());
+ }
+
+ function thisweek() {
+ var tdy = daystart(new Date());
+ var dow = tdy.getDay();
+ var wstart, wend;
+
+ wstart = new Date(1*tdy - 86400000 * dow);
+ wend = new Date(1*wstart + 86400000 * 7);
+ xmlhttp = new XMLHttpRequest();
+ sendquery(wstart.toISOString(), wend.toISOString());
+ }
+
+ function beforeyesterday() {
+ var tdy = daystart(new Date());
+ var ytd = new Date(1*tdy - 86400000);
+ var byd = new Date(1*ytd - 86400000);
+ xmlhttp = new XMLHttpRequest();
+ sendquery(byd.toISOString(), ytd.toISOString());
+ }
+
+ function yesterday() {
+ var tdy = daystart(new Date());
+ var ytd = new Date(1*tdy - 86400000);
+ xmlhttp = new XMLHttpRequest();
+ sendquery(ytd.toISOString(), tdy.toISOString());
+ }
+
+ function today() {
+ var tdy = daystart(new Date());
+ var tmr = new Date(1*tdy + 86400000);
+ xmlhttp = new XMLHttpRequest();
+ sendquery(tdy.toISOString(), tmr.toISOString());
+ }
+
function initialize() {
dbg = document.getElementById("debug");
canvas = document.getElementById("plot");
ctx = canvas.getContext("2d");
- xmlhttp = new XMLHttpRequest();
resize();
- sendquery();
+ today();
+
+ document.getElementById("today").onclick = today;
+ document.getElementById("yesterday").onclick = yesterday;
+ document.getElementById("beforeyesterday").onclick = beforeyesterday;
+ document.getElementById("thisweek").onclick = thisweek;
+ document.getElementById("prevweek").onclick = prevweek;
}
/* Set up */
}
</script>
<style>
+@font-face {
+ font-family: PipeDream;
+ src: url('PIPED.TTF') format('truetype');
+ /* Free to use font from http://www.mlink.net/~paterson/jpfonts.htm */
+}
h1 {
+ margin-top: 5px;
text-align: center;
+ font-family: PipeDream;
+ font-size: 64px;
+ font-weight: normal;
+ background-color: lightgray;
}
br {
clear: both;
}
div#currentvals {
- width: 14em;
+ width: 18em;
margin-left: auto;
margin-right: auto;
margin-bottom: 10px;
display: block;
width: 640px;
height: 320px;
+ /* border: solid 1px black; */
+}
+div#queries {
+ margin-left: auto;
+ margin-right: auto;
+ margin-bottom: 10px;
+ text-align: center;
+}
+div.query {
+ display: inline-block;
+ width: 8em;
+ height: 8em;
border: solid 1px black;
+ background-color: lightgray;
+ cursor: pointer;
+ vertical-align: middle;
+}
+span.query {
+ display: inline-block;
+ vertical-align: middle; /* does not work for some reason */
}
body {
margin: 0px;
</style>
<title>Water Meters</title>
</head><body>
-<h1>Water Meters</h1>
+<h1>WATER METERS</h1>
<div id="currentvals">
Current Values
<div class="current" id="cold">cold</div>
<br />
<canvas id="plot" width="640" height = "320"></canvas>
<br />
-<div id=debug>
+<div id="queries">
+ <div class="query" id="prevweek"><span class="query">PREVIOUS WEEK</span></div>
+ <div class="query" id="beforeyesterday"><span class="query">DAY
+ BEFORE YESTERDAY</span></div>
+ <div class="query" id="yesterday"><span class="query">YESTERDAY</span></div>
+ <div class="query" id="today"><span class="query">TODAY</span></div>
+ <div class="query" id="thisweek"><span class="query">THIS WEEK</span></div>
</div>
+<br />
+<div id="debug"></div>
</body>
projects / pulsecounter.git / blobdiff