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Show newest inserted values in chart with TimeSeriesCollection when zoomed


Show newest inserted values in chart with TimeSeriesCollection when zoomed

By : Navanath Gadsing
Date : November 20 2020, 04:01 AM
this will help I have such like a live chart realized with JFreeChart. The x-axis shows the time and there are several TimeSeriesCollections in the chart. If the a value is added to the TimeSeries the charts updates and shows the value only if it is not zoomed. Is there a possibility in the zoomed mode to show automatically new values (means to keep the zoom range and jump to the right). , I found a possible solution:
code :
this.chart.addChangeListener((ChartChangeEvent cce) -> {
        if (scrollToNewest) {
            Number max = DatasetUtilities.findMaximumDomainValue(this.plot.getDataset(0));
            ValueAxis va = this.plot.getDomainAxis();
            Range r = va.getRange();
            double curUpperBound = r.getUpperBound();
            double diff = max.doubleValue() - curUpperBound;
            Range newR = new Range(r.getLowerBound() + diff, r.getUpperBound() + diff);
            va.setRange(newR);
        }
    });


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Save/Load jFreechart TimeSeriesCollection chart from XML

Save/Load jFreechart TimeSeriesCollection chart from XML


By : Amit Kumar
Date : March 29 2020, 07:55 AM
wish helps you
The example uses the default values specified in TimeSeries for the maximum item age and count. You'll want to change them to suit your requirements.
Show specific month when zoomed on a quarterly chart using highcharts

Show specific month when zoomed on a quarterly chart using highcharts


By : Dan Weaving
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Okay, after reading their docs I found tickInterval and afterSetExtream to be what I needed to go from a quarterly view to a monthly view once I'm zoomed in.
Here's a code example:
code :
xAxis: {
  type: 'datetime',
  tickInterval: 3 * 30 * 24 * 3600 * 1000,
  events: {
    afterSetExtremes: function(event){
      if (event.max < this.getExtremes().dataMax || event.min > this.getExtremes().dataMin) {
        this.update({
          tickInterval: 1 * 30 * 24 * 3600 * 1000
        });
      } else {
        this.update({
          tickInterval: 3 * 30 * 24 * 3600 * 1000
        });
      }
    }
  }
Why is the data in a timeseriescollection chart don't appear correctly?

Why is the data in a timeseriescollection chart don't appear correctly?


By : jj2170937
Date : March 29 2020, 07:55 AM
help you fix your problem You're truncating dateI to the nearest hour. Instead, use Second to preserve the full resolution retrieved from the query and store the result in the model.
code :
s1.addOrUpdate(new Second(dateI), value);
axis.setDateFormatOverride(new SimpleDateFormat("yyyy-MM-dd HH"));
Highcharts showing points on hovering over the line which are outside the chart area when the chart is zoomed in

Highcharts showing points on hovering over the line which are outside the chart area when the chart is zoomed in


By : NMaity
Date : March 29 2020, 07:55 AM
To fix the issue you can do How about this - fiddle
Added these series options:
code :
type: 'scatter',
stickyTracking: false,
lineWidth: 2,
In jfreechart TimeSeriesCollection how to show dates which has only values?

In jfreechart TimeSeriesCollection how to show dates which has only values?


By : Marco Reis
Date : March 29 2020, 07:55 AM
To fix this issue , Try this:
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