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<html>
<head>
<script src="static/RGraph/libraries/RGraph.common.core.js" ></script>
<script src="static/RGraph/libraries/RGraph.common.effects.js" ></script>
<script src="static/RGraph/libraries/RGraph.led.js" ></script>
<script src="static/RGraph/libraries/RGraph.gauge.js" ></script>
<script src="static/RGraph/libraries/RGraph.line.js" ></script>
<style>
#led {
position: absolute;
left: 118px;
top: 95px;
z-index: 1;
}
#gauge1 {
position: absolute;
left: 5px;
}
#chart {
position: absolute;
left: 260px;
}
#chartHistory {
position: absolute;
top: 280px;
}
</style>
</head>
<body>
<canvas width=" 40px" height=" 20px" id="led"></canvas>
<canvas width="250px" height="250px" id="gauge1"></canvas>
<canvas width=" 0px" height="250px" id="chart"></canvas>
<canvas width=" 0px" height="250px" id="chartHistory"></canvas>
<script>
window.onload = function () {
document.getElementById("chart").width = window.innerWidth - document.getElementById("gauge1").width - 10;
document.getElementById("chartHistory").width = window.innerWidth - 10;
var data = {"value":null, ts:null};
var graph_data = [[],[]];
var data_max = 0;
var req_start = 0;
var GRAPH_MAX_POINTS = 1000;
for (var i=0; i< GRAPH_MAX_POINTS; ++i) {
graph_data[0].push(null);
graph_data[1].push(null);
}
var gauge1 = new RGraph.Gauge('gauge1', 20, 70);
gauge1.Set('chart.text.size', 8);
gauge1.Set('chart.units.post', 'dbA');
gauge1.Set('chart.green.color', 'lightGreen');
gauge1.Set('chart.yellow.color', 'yellow');
gauge1.Set('chart.red.color', 'red');
gauge1.Set('chart.green.end', 40);
gauge1.Set('chart.red.start', 60);
gauge1.Draw();
var led = new RGraph.LED('led', '00');
led.Set('chart.light', 'red');
led.Set('chart.zoom.background', false);
led.Set('chart.dark', 'rgba(0,0,0,0)');
led.Draw();
var graph = new RGraph.Line('chart', graph_data[0], graph_data[1]);
graph.Set('chart.title.yaxis', 'dBA');
graph.Set('chart.title.yaxis.pos', 0.4);
graph.Set('chart.ylabels.count', 5);
graph.Set('chart.gutter.top', 5);
graph.Set('chart.gutter.bottom', 5);
graph.Set('chart.gutter.left', 60);
graph.Set('chart.gutter.right', 5);
graph.Set('chart.linewidth', [3,1]);
graph.Set('chart.colors', ["red", "black"]);
graph.Set('chart.ymin', 20);
graph.Set('chart.ymax', 70);
graph.Set('chart.xticks', 25);
chartHistory = new RGraph.Line('chartHistory', []);
chartHistory.Set('chart.title.yaxis', 'dBA');
chartHistory.Set('chart.title.yaxis.pos', 0.4);
chartHistory.Set('chart.ylabels.count', 5);
chartHistory.Set('chart.gutter.top', 5);
chartHistory.Set('chart.gutter.bottom', 5);
chartHistory.Set('chart.gutter.left', 60);
chartHistory.Set('chart.gutter.right', 5);
chartHistory.Set('chart.linewidth', [1]);
chartHistory.Set('chart.colors', ["black"]);
chartHistory.Set('chart.ymin', 20);
chartHistory.Set('chart.ymax', 70);
chartHistory.Set('chart.xticks', 25);
function load() {
var http = new XMLHttpRequest();
http.open("GET", "now", true);
http.onreadystatechange = function() {
if (http.readyState == 4) {
var req_end = ( new Date ).getTime()
data = JSON.parse(http.responseText);
var d = req_end - req_start;
window.setTimeout(load, 500 - d);
}
}
req_start = ( new Date ).getTime();
http.send(null);
}
var httpinit = new XMLHttpRequest();
httpinit.open("GET", "range/", true);
httpinit.onreadystatechange = function(){
if (httpinit.readyState == 4) {
graph_data[1] = JSON.parse(httpinit.responseText);
// Start polling
init();
}
}
httpinit.send()
function json(path, func) {
var req = new XMLHttpRequest();
req.open("GET", path, true);
req.onreadystatechange = function() {
if (req.readyState == 4)
func( JSON.parse( req.responseText) );
};
req.send();
}
function refreshChartHistory() {
var now = new Date().getTime();
var from = now - ( 1000 * 60 * 60 * 24 * 2 );
var count = 1200;
json("range/" + from + "/" + now + "/" + count, function (data) {
RGraph.Clear(chartHistory.canvas);
chartHistory.original_data = [ data ];
chartHistory.Draw()
window.setTimeout( refreshChartHistory, 60 * 1000);
});
}
function init() {
load();
refreshChartHistory();
window.setInterval(function () {
// Gauge
gauge1.value = data['value'];
gauge1.Draw();
// LED
led.text = '' + Math.round(data['value']);
led.Draw()
// Line Chart
if (data['value'] > data_max) {
data_max = data['value'];
}
graph_data[0].unshift(data['value']);
while (graph_data[0].length > GRAPH_MAX_POINTS) {
graph_data[0].pop();
}
RGraph.Clear(graph.canvas);
graph.original_data = graph_data;
graph.Draw();
}, 500);
window.setInterval(function() {
// Line Chart - Max
graph_data[1].unshift(data_max);
data_max = 0;
while (graph_data[1].length > GRAPH_MAX_POINTS) {
graph_data[1].pop();
}
}, 10000);
}
}
</script>
</body>
</html>
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