Convert method between timestamp unaware collection and TimestampedValue about live-chart HOT 3 CLOSED

var renderer = new LiveChart.SmoothLineArea();
var cpu = new LiveChart.Serie("CPU", renderer);

var chart = new LiveChart.Chart();
chart.add_serie(cpu);
//Other stuff

//To add the CPU history 

var values = renderer.get_values();
values.clear(); // Clear all the data

//Here's your own data from ArrayList<double>
var cpu_history = new Gee.ArrayList<double?>();
cpu_history.add(10);
cpu_history.add(30);
cpu_history.add(20);
cpu_history.add(40);
cpu_history.add(20);
cpu_history.add(60);
cpu_history.add(30);
cpu_history.add(90);

var refresh_rate_is_ms = 2000; //your own refresh rate in milliseconds
var now = GLib.get_real_time() / 1000; //now in milliseconds

//the  timestamp of the first point
//we are considering that it is "now", but because of your data structure
//it can be between now and now - 2secs), we can't guess
var ts = now - (cpu_history.size * refresh_rate_is_ms); 

cpu_history.foreach((value) => {
    values.add({ts, value});    
    ts += refresh_rate_is_ms;
    return true;
});

var cpu = new LiveChart.Serie("CPU", new LiveChart.SmoothLineArea(););
var chart = new LiveChart.Chart();
chart.add_serie(cpu);

//Here's your own data from ArrayList<double>
var cpu_history = new Gee.ArrayList<double?>();
cpu_history.add(10);
cpu_history.add(30);
cpu_history.add(20);
cpu_history.add(40);
cpu_history.add(20);
cpu_history.add(60);
cpu_history.add(30);
cpu_history.add(90);

var refresh_rate_is_ms = 2000; //your own refresh rate in milliseconds

cpu.clear(); // Clear all the data
chart.add_unaware_timestamp_collection(cpu, cpu_history, refresh_rate_is_ms);