Dynamic TimeTableXYDataset .. possible?

[mentox]

Hi,

I have tryied some different Datasets Charts and some other Stuff


Now i am at the point to say i implement my own TableXYDataset if i must

but what do i need to implement ..

i want an dynamic stackedarea chart .. which shows hits from the last mintute for each second ... i a new second is done the chart should scroll and remove the oldes entry..

to remove entries out of the TimeTableXYDataset is very komplex and not save it can be that you forget some, because you cant sag remove all older than or some thing like this...

any one have an implementation or know wich interface i have to implement in this case?


thanks
with kind regards
dominique matz

[mentox]

Hello,

i have tryed some code ...


the chart is painting the axis with the rigth values but does the areas are not painted

what do i wrong?

Code: Select all

import java.util.Date;
import java.util.TreeMap;

import org.jfree.data.DomainInfo;
import org.jfree.data.Range;
import org.jfree.data.xy.AbstractXYDataset;
import org.jfree.data.xy.TableXYDataset;

public class DynamicTimeTableXYDataset extends AbstractXYDataset implements TableXYDataset, DomainInfo {

    private static final long serialVersionUID = 1L;

    int countColumn = 5;

    TreeMap<Date, long[]> cache = new TreeMap<Date, long[]>();

    public DynamicTimeTableXYDataset() {
        for (int i = 0; i < countColumn; i++) {
            appendData(new Date(), new long[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 });
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    public void appendData(Date date, long[] data) {

        cache.put(date, data);

        while (cache.size() > countColumn) {
            cache.remove(cache.firstKey());
        }
        
        fireDatasetChanged();
    }

    @Override
    public int getItemCount() {
        return cache.size();
    }

    // @Override
    // public DomainOrder getDomainOrder() {
    // return DomainOrder.ASCENDING;
    // }

    @Override
    public int getItemCount(int series) {
        return cache.size();
    }

    @Override
    public int getSeriesCount() {
        return cache.firstEntry().getValue().length;
    }

    @Override
    public Comparable getSeriesKey(int series) {
        return String.valueOf(series);
    }

    @Override
    public Number getX(int series, int item) {
        return cache.get(cache.keySet().toArray()[item])[series];
    }

    @Override
    public Number getY(int series, int item) {
        return getX(series, item);
    }

    @Override
    public Range getDomainBounds(boolean includeInterval) {
        return new Range(getDomainLowerBound(true), getDomainUpperBound(true));
    }

    @Override
    public double getDomainLowerBound(boolean includeInterval) {
        return cache.firstKey().getTime();
    }

    @Override
    public double getDomainUpperBound(boolean includeInterval) {
        return cache.lastKey().getTime();
    }

}

if some one can use the code feel free to use it this code has no license

[david.gilbert]

A couple of suggestions:

(1) Post a small demo app that uses this class, so we can just cut, paste, compile and run your code (instead of having to take a little more time to create our own running code);

(2) Check that you really mean to call getX() within the getY() method.

[mentox]

hi

where is the different between X and Y ...

i have only some series and for every a date with one value ..

i don know where ther is an x or y .. kann you help me or give me an url where i can read what x and y means .. how it is used