jcharts-users

[jCharts-users] no chart visible

[Andreas S. <sch...@mp...>]

Hi all,

I'm new to jchart and want to use it for a simple bar chart in my 
application.

I looked at the user guide and the Swing example and my code looks like 
this:

String[] goCate = new String[data.length];
double[][] counts = new double[1][data.length];
...
DataSeries ds = new DataSeries(goCate, "GO terms", "Number of hits",
    "Histogram");

AxisChartDataSet axds = new AxisChartDataSet(counts, new String[]{""}, 

    new Paint[]{Color.blue.darker()}, ChartType.BAR, new
    BarChartProperties());

ds.addIAxisPlotDataSet(axds);
AxisChart ac = new AxisChart(ds, new ChartProperties(), new
    AxisProperties(), null, 300, 400);

histogramFrame.setVisible(true);
ac.setGraphics2D((Graphics2D) histogramPanel.getGraphics());
ac.render();


However, if I run the application I only get an empty frame without 
chart. Does anybody have an idea what I could be doing wrong?

Thanks,
Andreas

[jCharts-users] chart is flickering

[Andreas S. <sch...@mp...>]

Hi all,

I'm using jdk 1.6 update 6 on Linux.

I want to create a simple Bar chart and display it in a separate JFrame. 
  The paint() method of my frame class looks like:

public void paint(Graphics g) {
         DataSeries ds = new DataSeries(goCate, "GO terms", "Number of 
hits", "Histogram");
         AxisChartDataSet axds = null;
         try {
             axds = new AxisChartDataSet(counts, new String[]{""}, new 
Paint[]{Color.blue.darker()}, ChartType.BAR, new BarChartProperties());
         } catch (ChartDataException ex) {
             ex.printStackTrace();
         }
         ds.addIAxisPlotDataSet(axds);
         AxisChart ac = new AxisChart(ds, new ChartProperties(), new 
AxisProperties(), null, this.panel.getWidth(), this.panel.getHeight());

         ac.setGraphics2D((Graphics2D) this.panel.getGraphics());
         try {
             ac.render();
         } catch (ChartDataException ex) {
             ex.printStackTrace();
         } catch (PropertyException ex) {
             ex.printStackTrace();
         }
     }

Which is essentially a copy of the SwingDemo of jCharts source code.

However, the chart is flickering and mostly showing only a grey pane. 
Furthermore, the frame is automatically resizing to a very small size. 
The 1.0.0-alpha release also shows the flickering but not the resizing.

Does anybody have an idea what goes wrong?

Thanks,
Andreas