<script>
var canvas;
var context;
+ var ww;
+ var wh;
+ var tmin;
+ var tmax;
function drawplot(times, color) {
- var tmin = times[0][0];
- var tfact = 640/(times[times.length-1][0] - tmin);
+ var tfact = ww / (tmax - tmin);
var i;
var height = [];
var hmax = 0;
if (hmax < height[i]) hmax = height[i];
}
height[i+1] = height[i];
- hfact = 480 / hmax;
+ hfact = wh / hmax;
context.beginPath();
- context.moveTo(0, 480 - height[1]*hfact);
+ context.moveTo(0, wh - height[1]*hfact);
for (i = 1; i < times.length; i++) {
- context.lineTo((times[i][0] - tmin)*tfact,480 - height[i]*hfact);
- context.lineTo((times[i][0] - tmin)*tfact,480 - height[i+1]*hfact);
+ context.lineTo((times[i][0] - tmin)*tfact,wh - height[i]*hfact);
+ context.lineTo((times[i][0] - tmin)*tfact,wh - height[i+1]*hfact);
}
context.strokeStyle = color;
context.stroke();
function gotdata(data) {
canvas = document.getElementById("plot");
context = canvas.getContext("2d");
+ ww = canvas.offsetWidth;
+ wh = canvas.offsetHeight;
+ tmin = data.range.lo;
+ tmax = data.range.hi;
+ document.getElementById("cold").innerHTML = data.current.cold;
+ document.getElementById("hot").innerHTML = data.current.hot;
drawplot(data.cold, "blue");
drawplot(data.hot, "red");
}
</script>
+<style>
+h1 {
+ text-align: center;
+}
+br {
+ clear: all;
+}
+div#currentvals {
+ width: 16em;
+ margin-left: auto;
+ margin-right: auto;
+ text-align: center;
+ font-size: 150%;
+}
+div.current {
+ position: relative;
+ padding: 0.2em;
+ border: solid 1px black;
+ margin: 1em;
+}
+div#cold {
+ float: left;
+ background-color: #d0e0ff;
+}
+div#hot {
+ float: right;
+ background-color: #ffd0e0;
+}
+canvas#plot {
+ margin-left: auto;
+ margin-right: auto;
+ border: solid 1px black;
+}
+</style>
+<title>Water Meters</title>
</head><body>
-<canvas id="plot" width="640" height = "480"
- style="border:solid 1px #000000;"></canvas>
-<hr/>
+<h1>Water Meters</h1>
+<div id="currentvals">
+ Current Values
+ <div class="current" id="cold">cold</div>
+ <div class="current" id="hot">hot</div>
+</div>
+<br />
+<canvas id="plot" width="640" height = "480"></canvas>
+<br />
<div id=debug>
</div>
<script>
projects / pulsecounter.git / commitdiff