JavaFX LineChart with many entrys

问题

i want to display the cpu usage in a line chart. The Problem it, that if there are to many entrys i becomes confused. I tried to delete the first entry after X entrys but then the chart is not fully used. I want, that the line chart is filled with data but from begining to end.

Example with many entrys and delet the first one

Here is some example code:

This is the Controller, where i create the series and start the Thread to update my data.

public class FXMLDocumentController implements Initializable {

@FXML private LineChart chart;
XYChart.Series series = new XYChart.Series();

@Override
public void initialize(URL url, ResourceBundle rb) {
    chart.getData().add(series);
    ThreadTest updateChart = new ThreadTest(series);
    Thread test = new Thread(updateChart);
    test.start();
}

}

Here is the thread to update the data and after more then 10 entrys have been added i remove the first one, so that there are not to many entrys on the chart. I tried also to move after remove the first one to get the rest of the entrys and set them to 0-X so that there is always an first one. But i think the series do this autmaticly but i dont get an exception if i try to remove the first item over and over again.

public class ThreadTest extends Task<Void>{

private int chartCounter;
private XYChart.Series series;
private boolean running=true;

public ThreadTest(XYChart.Series series){
    this.series=series;
}

@Override
protected Void call() throws Exception {
    while(running){
    series.getData().add(new XYChart.Data(chartCounter, (int)(Math.random() * 10)));
    System.out.println("Test");
    chartCounter++;
    if(series.getData().size()>10){
        series.getData().remove(0);
    }
    Thread.sleep(1000);
    }
    return null;
}

}

Thanks for help!!

来源：https://stackoverflow.com/questions/32291239/javafx-linechart-with-many-entrys

标签

user-interface

charts

javafx