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function Graph(container, id, options, transform) {
if( !options ) options = { };
this.id = id;
this.cols = 100;
this.type = "line";
this.options = options;
this.transform = transform;
this.dataset = {};
var graph = document.createElement('div');
var label = document.createElement('h2');
label.innerHTML = options.title
? options.title.replace("%s", id ) : id;
container.appendChild( label );
container.appendChild( graph );
this.canvas = document.createElement('canvas');
graph.appendChild( this.canvas );
this.canvas.id = id;
this.canvas.width = ( options.width || graph.offsetWidth - 20 );
this.canvas.height = ( options.height || 300 );
}
Graph.prototype.addDataset = function(name, ds) {
if( window.console ) console.debug("AddDataset: " + name);
if( !this.layout ) {
this.layout = new PlotKit.Layout( this.type, this.options );
}
if( !ds ) {
ds = new Array();
for( var i = 0; i < this.cols; i++ )
ds[i] = new Array( i, 0 );
}
this.dataset[name] = ds;
this.layout.addDataset(name, ds);
}
Graph.prototype.updateDataset = function(name, value) {
if( window.console ) console.debug("UpdateDataset: " + name + " " + value);
if( this.dataset[name] ) {
var ds = this.dataset[name];
for( var i = 1; i < this.cols; i++ )
ds[i-1][1] = ds[i][1];
value = Math.abs( parseFloat(value) || 0 );
if( this.transform ) {
value = ( ds[this.cols-1][1] > 0 )
? this.transform(value, ds[this.cols-1][1]) : 0.01;
}
ds[this.cols-1][1] = value;
this.layout.addDataset(name, ds);
}
}
Graph.prototype.draw = function( options ) {
if( this.layout ) {
this.plotter = new PlotKit.CanvasRenderer(
this.canvas, this.layout, this.options || options || {}
);
this.layout.evaluate();
this.plotter.render();
}
}
Graph.prototype.redraw = function() {
if( this.layout && this.plotter ) {
this.layout.evaluate();
this.plotter.clear();
this.plotter.render();
}
}
function GraphRPC(container, uri, action, interval, datasources, options, transform) {
this.ds = datasources;
this.uri = uri
this.action = action;
this.options = options || { };
this.container = container;
this.transform = transform;
this.proxy = new MochiKit.JsonRpc.JsonRpcProxy(uri, [action]);
this.graphs = new Object();
this.requestData();
if( interval ) {
var self = this;
window.setInterval(function(){self.requestData()}, interval);
}
}
GraphRPC.prototype.requestData = function() {
var r = this.proxy[this.action](); var self = this;
r.addCallback(function(r){ self.dispatchResponse(r) });
r.addErrback(function(e){ throw('Error: ' + e) });
}
GraphRPC.prototype.dispatchResponse = function(response) {
var instances;
if( this.options.instances ) {
instances = this.options.instances;
}
else {
instances = new Array();
for( var instance in response ) {
instances[instances.length] = instance;
}
}
for( var j = 0; j < instances.length; j++ ) {
var instance = instances[j];
if( this.options.separateDS ) {
for( var i = 0; i < this.ds.length; i += 2 ) {
var name = this.ds[i+1] || this.ds[i];
var gid = instance + '-' + name;
var otle = this.options.title || instance;
if( !this.graphs[gid] ) {
this.options.title = otle.replace('%s', instance) + ': ' + name;
this.graphs[gid] = new Graph(
this.container, gid, this.options, this.transform
);
this.graphs[gid].addDataset(name);
this.graphs[gid].draw();
this.options.title = otle;
}
else
{
this.graphs[gid].updateDataset(
name, instance
? response[instance][this.ds[i]]
: response[parseInt(this.ds[i])]
);
this.graphs[gid].redraw();
}
}
}
else {
if( !this.graphs[instance] ) {
this.graphs[instance] = new Graph(
this.container, instance, this.options, this.transform
);
if( window.console ) console.debug("NG: " + instance);
for( var i = 0; i < this.ds.length; i += 2 ) {
var name = this.ds[i+1] || this.ds[i];
if( window.console ) console.debug("ADS: " + name);
this.graphs[instance].addDataset(name);
}
this.graphs[instance].draw();
}
else {
for( var i = 0; i < this.ds.length; i += 2 ) {
var name = this.ds[i+1] || this.ds[i];
if( window.console ) console.debug("UDS: " + name + " " + response[instance][this.ds[i]]);
this.graphs[instance].updateDataset(
name, instance
? response[instance][this.ds[i]]
: response[parseInt(this.ds[i])]
);
}
this.graphs[instance].redraw();
}
}
}
}
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